]>
Commit | Line | Data |
---|---|---|
5aab621b ACM |
1 | #define _GNU_SOURCE |
2 | #include <ctype.h> | |
3 | #include <dirent.h> | |
4 | #include <errno.h> | |
5 | #include <libgen.h> | |
6 | #include <stdlib.h> | |
7 | #include <stdio.h> | |
8 | #include <string.h> | |
9 | #include <sys/types.h> | |
10 | #include <sys/stat.h> | |
11 | #include <sys/param.h> | |
12 | #include <fcntl.h> | |
13 | #include <unistd.h> | |
b36f19d5 | 14 | #include "build-id.h" |
8a6c5b26 | 15 | #include "debug.h" |
a2928c42 | 16 | #include "symbol.h" |
5aab621b | 17 | #include "strlist.h" |
a2928c42 ACM |
18 | |
19 | #include <libelf.h> | |
20 | #include <gelf.h> | |
21 | #include <elf.h> | |
f1617b40 | 22 | #include <limits.h> |
439d473b | 23 | #include <sys/utsname.h> |
2cdbc46d | 24 | |
c12e15e7 ACM |
25 | #ifndef NT_GNU_BUILD_ID |
26 | #define NT_GNU_BUILD_ID 3 | |
27 | #endif | |
28 | ||
b0da954a | 29 | static void dsos__add(struct list_head *head, struct dso *dso); |
3610583c | 30 | static struct map *map__new2(u64 start, struct dso *dso, enum map_type type); |
c338aee8 | 31 | static int dso__load_kernel_sym(struct dso *self, struct map *map, |
9de89fe7 | 32 | symbol_filter_t filter); |
a1645ce1 ZY |
33 | static int dso__load_guest_kernel_sym(struct dso *self, struct map *map, |
34 | symbol_filter_t filter); | |
cc612d81 ACM |
35 | static int vmlinux_path__nr_entries; |
36 | static char **vmlinux_path; | |
439d473b | 37 | |
75be6cf4 | 38 | struct symbol_conf symbol_conf = { |
d599db3f | 39 | .exclude_other = true, |
b32d133a ACM |
40 | .use_modules = true, |
41 | .try_vmlinux_path = true, | |
42 | }; | |
43 | ||
8a6c5b26 ACM |
44 | int dso__name_len(const struct dso *self) |
45 | { | |
46 | if (verbose) | |
47 | return self->long_name_len; | |
48 | ||
49 | return self->short_name_len; | |
50 | } | |
51 | ||
3610583c ACM |
52 | bool dso__loaded(const struct dso *self, enum map_type type) |
53 | { | |
54 | return self->loaded & (1 << type); | |
55 | } | |
56 | ||
79406cd7 ACM |
57 | bool dso__sorted_by_name(const struct dso *self, enum map_type type) |
58 | { | |
59 | return self->sorted_by_name & (1 << type); | |
60 | } | |
61 | ||
79406cd7 ACM |
62 | static void dso__set_sorted_by_name(struct dso *self, enum map_type type) |
63 | { | |
64 | self->sorted_by_name |= (1 << type); | |
65 | } | |
66 | ||
36a3e646 | 67 | bool symbol_type__is_a(char symbol_type, enum map_type map_type) |
6893d4ee ACM |
68 | { |
69 | switch (map_type) { | |
70 | case MAP__FUNCTION: | |
71 | return symbol_type == 'T' || symbol_type == 'W'; | |
f1dfa0b1 ACM |
72 | case MAP__VARIABLE: |
73 | return symbol_type == 'D' || symbol_type == 'd'; | |
6893d4ee ACM |
74 | default: |
75 | return false; | |
76 | } | |
77 | } | |
78 | ||
fcf1203a | 79 | static void symbols__fixup_end(struct rb_root *self) |
af427bf5 | 80 | { |
fcf1203a | 81 | struct rb_node *nd, *prevnd = rb_first(self); |
2e538c4a | 82 | struct symbol *curr, *prev; |
af427bf5 ACM |
83 | |
84 | if (prevnd == NULL) | |
85 | return; | |
86 | ||
2e538c4a ACM |
87 | curr = rb_entry(prevnd, struct symbol, rb_node); |
88 | ||
af427bf5 | 89 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { |
2e538c4a ACM |
90 | prev = curr; |
91 | curr = rb_entry(nd, struct symbol, rb_node); | |
af427bf5 ACM |
92 | |
93 | if (prev->end == prev->start) | |
94 | prev->end = curr->start - 1; | |
af427bf5 | 95 | } |
2e538c4a ACM |
96 | |
97 | /* Last entry */ | |
98 | if (curr->end == curr->start) | |
99 | curr->end = roundup(curr->start, 4096); | |
af427bf5 ACM |
100 | } |
101 | ||
9958e1f0 | 102 | static void __map_groups__fixup_end(struct map_groups *self, enum map_type type) |
af427bf5 ACM |
103 | { |
104 | struct map *prev, *curr; | |
95011c60 | 105 | struct rb_node *nd, *prevnd = rb_first(&self->maps[type]); |
af427bf5 ACM |
106 | |
107 | if (prevnd == NULL) | |
108 | return; | |
109 | ||
110 | curr = rb_entry(prevnd, struct map, rb_node); | |
af427bf5 ACM |
111 | |
112 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { | |
113 | prev = curr; | |
114 | curr = rb_entry(nd, struct map, rb_node); | |
115 | prev->end = curr->start - 1; | |
2e538c4a | 116 | } |
90c83218 ACM |
117 | |
118 | /* | |
119 | * We still haven't the actual symbols, so guess the | |
120 | * last map final address. | |
121 | */ | |
122 | curr->end = ~0UL; | |
af427bf5 ACM |
123 | } |
124 | ||
9958e1f0 | 125 | static void map_groups__fixup_end(struct map_groups *self) |
23ea4a3f ACM |
126 | { |
127 | int i; | |
128 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
9958e1f0 | 129 | __map_groups__fixup_end(self, i); |
23ea4a3f ACM |
130 | } |
131 | ||
00a192b3 | 132 | static struct symbol *symbol__new(u64 start, u64 len, const char *name) |
a2928c42 | 133 | { |
0085c954 | 134 | size_t namelen = strlen(name) + 1; |
5aab621b ACM |
135 | struct symbol *self = calloc(1, (symbol_conf.priv_size + |
136 | sizeof(*self) + namelen)); | |
36479484 | 137 | if (self == NULL) |
0b73da3f IM |
138 | return NULL; |
139 | ||
75be6cf4 ACM |
140 | if (symbol_conf.priv_size) |
141 | self = ((void *)self) + symbol_conf.priv_size; | |
36479484 | 142 | |
fefb0b94 ACM |
143 | self->start = start; |
144 | self->end = len ? start + len - 1 : start; | |
145 | self->namelen = namelen - 1; | |
e4204992 | 146 | |
29a9f66d | 147 | pr_debug4("%s: %s %#Lx-%#Lx\n", __func__, name, start, self->end); |
e4204992 | 148 | |
0b73da3f | 149 | memcpy(self->name, name, namelen); |
a2928c42 ACM |
150 | |
151 | return self; | |
152 | } | |
153 | ||
628ada0c | 154 | void symbol__delete(struct symbol *self) |
a2928c42 | 155 | { |
75be6cf4 | 156 | free(((void *)self) - symbol_conf.priv_size); |
a2928c42 ACM |
157 | } |
158 | ||
159 | static size_t symbol__fprintf(struct symbol *self, FILE *fp) | |
160 | { | |
439d473b | 161 | return fprintf(fp, " %llx-%llx %s\n", |
a2928c42 ACM |
162 | self->start, self->end, self->name); |
163 | } | |
164 | ||
b7cece76 | 165 | void dso__set_long_name(struct dso *self, char *name) |
cfc10d3b | 166 | { |
ef6ae724 ACM |
167 | if (name == NULL) |
168 | return; | |
cfc10d3b ACM |
169 | self->long_name = name; |
170 | self->long_name_len = strlen(name); | |
171 | } | |
172 | ||
b63be8d7 ACM |
173 | static void dso__set_short_name(struct dso *self, const char *name) |
174 | { | |
175 | if (name == NULL) | |
176 | return; | |
177 | self->short_name = name; | |
178 | self->short_name_len = strlen(name); | |
179 | } | |
180 | ||
cfc10d3b ACM |
181 | static void dso__set_basename(struct dso *self) |
182 | { | |
b63be8d7 | 183 | dso__set_short_name(self, basename(self->long_name)); |
cfc10d3b ACM |
184 | } |
185 | ||
00a192b3 | 186 | struct dso *dso__new(const char *name) |
a2928c42 | 187 | { |
5aab621b | 188 | struct dso *self = calloc(1, sizeof(*self) + strlen(name) + 1); |
a2928c42 ACM |
189 | |
190 | if (self != NULL) { | |
6a4694a4 | 191 | int i; |
a2928c42 | 192 | strcpy(self->name, name); |
cfc10d3b | 193 | dso__set_long_name(self, self->name); |
b63be8d7 | 194 | dso__set_short_name(self, self->name); |
6a4694a4 | 195 | for (i = 0; i < MAP__NR_TYPES; ++i) |
79406cd7 | 196 | self->symbols[i] = self->symbol_names[i] = RB_ROOT; |
52d422de | 197 | self->slen_calculated = 0; |
94cb9e38 | 198 | self->origin = DSO__ORIG_NOT_FOUND; |
8d06367f | 199 | self->loaded = 0; |
79406cd7 | 200 | self->sorted_by_name = 0; |
8d06367f | 201 | self->has_build_id = 0; |
a1645ce1 | 202 | self->kernel = DSO_TYPE_USER; |
0ab061cd | 203 | INIT_LIST_HEAD(&self->node); |
a2928c42 ACM |
204 | } |
205 | ||
206 | return self; | |
207 | } | |
208 | ||
fcf1203a | 209 | static void symbols__delete(struct rb_root *self) |
a2928c42 ACM |
210 | { |
211 | struct symbol *pos; | |
fcf1203a | 212 | struct rb_node *next = rb_first(self); |
a2928c42 ACM |
213 | |
214 | while (next) { | |
215 | pos = rb_entry(next, struct symbol, rb_node); | |
216 | next = rb_next(&pos->rb_node); | |
fcf1203a | 217 | rb_erase(&pos->rb_node, self); |
00a192b3 | 218 | symbol__delete(pos); |
a2928c42 ACM |
219 | } |
220 | } | |
221 | ||
222 | void dso__delete(struct dso *self) | |
223 | { | |
6a4694a4 ACM |
224 | int i; |
225 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
226 | symbols__delete(&self->symbols[i]); | |
6e406257 ACM |
227 | if (self->sname_alloc) |
228 | free((char *)self->short_name); | |
229 | if (self->lname_alloc) | |
439d473b | 230 | free(self->long_name); |
a2928c42 ACM |
231 | free(self); |
232 | } | |
233 | ||
8d06367f ACM |
234 | void dso__set_build_id(struct dso *self, void *build_id) |
235 | { | |
236 | memcpy(self->build_id, build_id, sizeof(self->build_id)); | |
237 | self->has_build_id = 1; | |
238 | } | |
239 | ||
fcf1203a | 240 | static void symbols__insert(struct rb_root *self, struct symbol *sym) |
a2928c42 | 241 | { |
fcf1203a | 242 | struct rb_node **p = &self->rb_node; |
a2928c42 | 243 | struct rb_node *parent = NULL; |
9cffa8d5 | 244 | const u64 ip = sym->start; |
a2928c42 ACM |
245 | struct symbol *s; |
246 | ||
247 | while (*p != NULL) { | |
248 | parent = *p; | |
249 | s = rb_entry(parent, struct symbol, rb_node); | |
250 | if (ip < s->start) | |
251 | p = &(*p)->rb_left; | |
252 | else | |
253 | p = &(*p)->rb_right; | |
254 | } | |
255 | rb_link_node(&sym->rb_node, parent, p); | |
fcf1203a | 256 | rb_insert_color(&sym->rb_node, self); |
a2928c42 ACM |
257 | } |
258 | ||
fcf1203a | 259 | static struct symbol *symbols__find(struct rb_root *self, u64 ip) |
a2928c42 ACM |
260 | { |
261 | struct rb_node *n; | |
262 | ||
263 | if (self == NULL) | |
264 | return NULL; | |
265 | ||
fcf1203a | 266 | n = self->rb_node; |
a2928c42 ACM |
267 | |
268 | while (n) { | |
269 | struct symbol *s = rb_entry(n, struct symbol, rb_node); | |
270 | ||
271 | if (ip < s->start) | |
272 | n = n->rb_left; | |
273 | else if (ip > s->end) | |
274 | n = n->rb_right; | |
275 | else | |
276 | return s; | |
277 | } | |
278 | ||
279 | return NULL; | |
280 | } | |
281 | ||
79406cd7 ACM |
282 | struct symbol_name_rb_node { |
283 | struct rb_node rb_node; | |
284 | struct symbol sym; | |
285 | }; | |
286 | ||
287 | static void symbols__insert_by_name(struct rb_root *self, struct symbol *sym) | |
288 | { | |
289 | struct rb_node **p = &self->rb_node; | |
290 | struct rb_node *parent = NULL; | |
291 | struct symbol_name_rb_node *symn = ((void *)sym) - sizeof(*parent), *s; | |
292 | ||
293 | while (*p != NULL) { | |
294 | parent = *p; | |
295 | s = rb_entry(parent, struct symbol_name_rb_node, rb_node); | |
296 | if (strcmp(sym->name, s->sym.name) < 0) | |
297 | p = &(*p)->rb_left; | |
298 | else | |
299 | p = &(*p)->rb_right; | |
300 | } | |
301 | rb_link_node(&symn->rb_node, parent, p); | |
302 | rb_insert_color(&symn->rb_node, self); | |
303 | } | |
304 | ||
305 | static void symbols__sort_by_name(struct rb_root *self, struct rb_root *source) | |
306 | { | |
307 | struct rb_node *nd; | |
308 | ||
309 | for (nd = rb_first(source); nd; nd = rb_next(nd)) { | |
310 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
311 | symbols__insert_by_name(self, pos); | |
312 | } | |
313 | } | |
314 | ||
315 | static struct symbol *symbols__find_by_name(struct rb_root *self, const char *name) | |
316 | { | |
317 | struct rb_node *n; | |
318 | ||
319 | if (self == NULL) | |
320 | return NULL; | |
321 | ||
322 | n = self->rb_node; | |
323 | ||
324 | while (n) { | |
325 | struct symbol_name_rb_node *s; | |
326 | int cmp; | |
327 | ||
328 | s = rb_entry(n, struct symbol_name_rb_node, rb_node); | |
329 | cmp = strcmp(name, s->sym.name); | |
330 | ||
331 | if (cmp < 0) | |
332 | n = n->rb_left; | |
333 | else if (cmp > 0) | |
334 | n = n->rb_right; | |
335 | else | |
336 | return &s->sym; | |
337 | } | |
338 | ||
339 | return NULL; | |
340 | } | |
341 | ||
342 | struct symbol *dso__find_symbol(struct dso *self, | |
343 | enum map_type type, u64 addr) | |
fcf1203a | 344 | { |
6a4694a4 | 345 | return symbols__find(&self->symbols[type], addr); |
fcf1203a ACM |
346 | } |
347 | ||
79406cd7 ACM |
348 | struct symbol *dso__find_symbol_by_name(struct dso *self, enum map_type type, |
349 | const char *name) | |
350 | { | |
351 | return symbols__find_by_name(&self->symbol_names[type], name); | |
352 | } | |
353 | ||
354 | void dso__sort_by_name(struct dso *self, enum map_type type) | |
355 | { | |
356 | dso__set_sorted_by_name(self, type); | |
357 | return symbols__sort_by_name(&self->symbol_names[type], | |
358 | &self->symbols[type]); | |
359 | } | |
360 | ||
ef12a141 | 361 | int build_id__sprintf(const u8 *self, int len, char *bf) |
a2928c42 | 362 | { |
8d06367f | 363 | char *bid = bf; |
ef12a141 | 364 | const u8 *raw = self; |
8d06367f | 365 | int i; |
a2928c42 | 366 | |
8d06367f ACM |
367 | for (i = 0; i < len; ++i) { |
368 | sprintf(bid, "%02x", *raw); | |
369 | ++raw; | |
370 | bid += 2; | |
371 | } | |
372 | ||
373 | return raw - self; | |
374 | } | |
375 | ||
9e03eb2d | 376 | size_t dso__fprintf_buildid(struct dso *self, FILE *fp) |
8d06367f ACM |
377 | { |
378 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
8d06367f ACM |
379 | |
380 | build_id__sprintf(self->build_id, sizeof(self->build_id), sbuild_id); | |
9e03eb2d ACM |
381 | return fprintf(fp, "%s", sbuild_id); |
382 | } | |
383 | ||
95011c60 | 384 | size_t dso__fprintf(struct dso *self, enum map_type type, FILE *fp) |
9e03eb2d ACM |
385 | { |
386 | struct rb_node *nd; | |
387 | size_t ret = fprintf(fp, "dso: %s (", self->short_name); | |
388 | ||
3846df2e ACM |
389 | if (self->short_name != self->long_name) |
390 | ret += fprintf(fp, "%s, ", self->long_name); | |
391 | ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type], | |
392 | self->loaded ? "" : "NOT "); | |
9e03eb2d | 393 | ret += dso__fprintf_buildid(self, fp); |
6a4694a4 | 394 | ret += fprintf(fp, ")\n"); |
95011c60 ACM |
395 | for (nd = rb_first(&self->symbols[type]); nd; nd = rb_next(nd)) { |
396 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
397 | ret += symbol__fprintf(pos, fp); | |
a2928c42 ACM |
398 | } |
399 | ||
400 | return ret; | |
401 | } | |
402 | ||
9e201442 ACM |
403 | int kallsyms__parse(const char *filename, void *arg, |
404 | int (*process_symbol)(void *arg, const char *name, | |
682b335a | 405 | char type, u64 start)) |
a2928c42 | 406 | { |
a2928c42 ACM |
407 | char *line = NULL; |
408 | size_t n; | |
682b335a | 409 | int err = 0; |
9e201442 | 410 | FILE *file = fopen(filename, "r"); |
a2928c42 ACM |
411 | |
412 | if (file == NULL) | |
413 | goto out_failure; | |
414 | ||
415 | while (!feof(file)) { | |
9cffa8d5 | 416 | u64 start; |
a2928c42 ACM |
417 | int line_len, len; |
418 | char symbol_type; | |
2e538c4a | 419 | char *symbol_name; |
a2928c42 ACM |
420 | |
421 | line_len = getline(&line, &n, file); | |
a1645ce1 | 422 | if (line_len < 0 || !line) |
a2928c42 ACM |
423 | break; |
424 | ||
a2928c42 ACM |
425 | line[--line_len] = '\0'; /* \n */ |
426 | ||
a0055ae2 | 427 | len = hex2u64(line, &start); |
a2928c42 ACM |
428 | |
429 | len++; | |
430 | if (len + 2 >= line_len) | |
431 | continue; | |
432 | ||
433 | symbol_type = toupper(line[len]); | |
af427bf5 | 434 | symbol_name = line + len + 2; |
682b335a ACM |
435 | |
436 | err = process_symbol(arg, symbol_name, symbol_type, start); | |
437 | if (err) | |
438 | break; | |
2e538c4a ACM |
439 | } |
440 | ||
441 | free(line); | |
442 | fclose(file); | |
682b335a | 443 | return err; |
2e538c4a | 444 | |
2e538c4a ACM |
445 | out_failure: |
446 | return -1; | |
447 | } | |
448 | ||
682b335a ACM |
449 | struct process_kallsyms_args { |
450 | struct map *map; | |
451 | struct dso *dso; | |
452 | }; | |
453 | ||
454 | static int map__process_kallsym_symbol(void *arg, const char *name, | |
455 | char type, u64 start) | |
456 | { | |
457 | struct symbol *sym; | |
458 | struct process_kallsyms_args *a = arg; | |
459 | struct rb_root *root = &a->dso->symbols[a->map->type]; | |
460 | ||
461 | if (!symbol_type__is_a(type, a->map->type)) | |
462 | return 0; | |
463 | ||
464 | /* | |
465 | * Will fix up the end later, when we have all symbols sorted. | |
466 | */ | |
467 | sym = symbol__new(start, 0, name); | |
468 | ||
469 | if (sym == NULL) | |
470 | return -ENOMEM; | |
471 | /* | |
472 | * We will pass the symbols to the filter later, in | |
473 | * map__split_kallsyms, when we have split the maps per module | |
474 | */ | |
475 | symbols__insert(root, sym); | |
a1645ce1 | 476 | |
682b335a ACM |
477 | return 0; |
478 | } | |
479 | ||
480 | /* | |
481 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
482 | * so that we can in the next step set the symbol ->end address and then | |
483 | * call kernel_maps__split_kallsyms. | |
484 | */ | |
9e201442 ACM |
485 | static int dso__load_all_kallsyms(struct dso *self, const char *filename, |
486 | struct map *map) | |
682b335a ACM |
487 | { |
488 | struct process_kallsyms_args args = { .map = map, .dso = self, }; | |
9e201442 | 489 | return kallsyms__parse(filename, &args, map__process_kallsym_symbol); |
682b335a ACM |
490 | } |
491 | ||
2e538c4a ACM |
492 | /* |
493 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
494 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
495 | * the original ELF section names vmlinux have. | |
496 | */ | |
9958e1f0 | 497 | static int dso__split_kallsyms(struct dso *self, struct map *map, |
9de89fe7 | 498 | symbol_filter_t filter) |
2e538c4a | 499 | { |
9de89fe7 | 500 | struct map_groups *kmaps = map__kmap(map)->kmaps; |
23346f21 | 501 | struct machine *machine = kmaps->machine; |
4e06255f | 502 | struct map *curr_map = map; |
2e538c4a ACM |
503 | struct symbol *pos; |
504 | int count = 0; | |
4e06255f ACM |
505 | struct rb_root *root = &self->symbols[map->type]; |
506 | struct rb_node *next = rb_first(root); | |
2e538c4a ACM |
507 | int kernel_range = 0; |
508 | ||
509 | while (next) { | |
510 | char *module; | |
511 | ||
512 | pos = rb_entry(next, struct symbol, rb_node); | |
513 | next = rb_next(&pos->rb_node); | |
514 | ||
515 | module = strchr(pos->name, '\t'); | |
516 | if (module) { | |
75be6cf4 | 517 | if (!symbol_conf.use_modules) |
1de8e245 ACM |
518 | goto discard_symbol; |
519 | ||
2e538c4a ACM |
520 | *module++ = '\0'; |
521 | ||
b7cece76 | 522 | if (strcmp(curr_map->dso->short_name, module)) { |
a1645ce1 | 523 | if (curr_map != map && |
23346f21 ACM |
524 | self->kernel == DSO_TYPE_GUEST_KERNEL && |
525 | machine__is_default_guest(machine)) { | |
a1645ce1 ZY |
526 | /* |
527 | * We assume all symbols of a module are | |
528 | * continuous in * kallsyms, so curr_map | |
529 | * points to a module and all its | |
530 | * symbols are in its kmap. Mark it as | |
531 | * loaded. | |
532 | */ | |
533 | dso__set_loaded(curr_map->dso, | |
534 | curr_map->type); | |
535 | } | |
536 | ||
537 | curr_map = map_groups__find_by_name(kmaps, | |
538 | map->type, module); | |
4e06255f | 539 | if (curr_map == NULL) { |
2f51903b | 540 | pr_debug("%s/proc/{kallsyms,modules} " |
b7cece76 | 541 | "inconsistency while looking " |
a1645ce1 | 542 | "for \"%s\" module!\n", |
23346f21 | 543 | machine->root_dir, module); |
a1645ce1 ZY |
544 | curr_map = map; |
545 | goto discard_symbol; | |
af427bf5 | 546 | } |
b7cece76 | 547 | |
a1645ce1 | 548 | if (curr_map->dso->loaded && |
23346f21 | 549 | !machine__is_default_guest(machine)) |
b7cece76 | 550 | goto discard_symbol; |
af427bf5 | 551 | } |
2e538c4a ACM |
552 | /* |
553 | * So that we look just like we get from .ko files, | |
554 | * i.e. not prelinked, relative to map->start. | |
555 | */ | |
4e06255f ACM |
556 | pos->start = curr_map->map_ip(curr_map, pos->start); |
557 | pos->end = curr_map->map_ip(curr_map, pos->end); | |
558 | } else if (curr_map != map) { | |
2e538c4a ACM |
559 | char dso_name[PATH_MAX]; |
560 | struct dso *dso; | |
561 | ||
a1645ce1 ZY |
562 | if (self->kernel == DSO_TYPE_GUEST_KERNEL) |
563 | snprintf(dso_name, sizeof(dso_name), | |
564 | "[guest.kernel].%d", | |
565 | kernel_range++); | |
566 | else | |
567 | snprintf(dso_name, sizeof(dso_name), | |
568 | "[kernel].%d", | |
569 | kernel_range++); | |
2e538c4a | 570 | |
00a192b3 | 571 | dso = dso__new(dso_name); |
2e538c4a ACM |
572 | if (dso == NULL) |
573 | return -1; | |
574 | ||
a1645ce1 ZY |
575 | dso->kernel = self->kernel; |
576 | ||
4e06255f | 577 | curr_map = map__new2(pos->start, dso, map->type); |
37fe5fcb | 578 | if (curr_map == NULL) { |
2e538c4a ACM |
579 | dso__delete(dso); |
580 | return -1; | |
581 | } | |
a2928c42 | 582 | |
4e06255f | 583 | curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; |
9de89fe7 | 584 | map_groups__insert(kmaps, curr_map); |
2e538c4a ACM |
585 | ++kernel_range; |
586 | } | |
a2928c42 | 587 | |
4e06255f | 588 | if (filter && filter(curr_map, pos)) { |
1de8e245 | 589 | discard_symbol: rb_erase(&pos->rb_node, root); |
00a192b3 | 590 | symbol__delete(pos); |
2e538c4a | 591 | } else { |
4e06255f ACM |
592 | if (curr_map != map) { |
593 | rb_erase(&pos->rb_node, root); | |
594 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
2e538c4a | 595 | } |
9974f496 MG |
596 | count++; |
597 | } | |
a2928c42 ACM |
598 | } |
599 | ||
a1645ce1 ZY |
600 | if (curr_map != map && |
601 | self->kernel == DSO_TYPE_GUEST_KERNEL && | |
23346f21 | 602 | machine__is_default_guest(kmaps->machine)) { |
a1645ce1 ZY |
603 | dso__set_loaded(curr_map->dso, curr_map->type); |
604 | } | |
605 | ||
9974f496 | 606 | return count; |
2e538c4a | 607 | } |
a2928c42 | 608 | |
9de89fe7 ACM |
609 | int dso__load_kallsyms(struct dso *self, const char *filename, |
610 | struct map *map, symbol_filter_t filter) | |
2e538c4a | 611 | { |
9e201442 | 612 | if (dso__load_all_kallsyms(self, filename, map) < 0) |
2e538c4a ACM |
613 | return -1; |
614 | ||
4e06255f | 615 | symbols__fixup_end(&self->symbols[map->type]); |
a1645ce1 ZY |
616 | if (self->kernel == DSO_TYPE_GUEST_KERNEL) |
617 | self->origin = DSO__ORIG_GUEST_KERNEL; | |
618 | else | |
619 | self->origin = DSO__ORIG_KERNEL; | |
2e538c4a | 620 | |
9de89fe7 | 621 | return dso__split_kallsyms(self, map, filter); |
af427bf5 ACM |
622 | } |
623 | ||
439d473b | 624 | static int dso__load_perf_map(struct dso *self, struct map *map, |
6beba7ad | 625 | symbol_filter_t filter) |
80d496be PE |
626 | { |
627 | char *line = NULL; | |
628 | size_t n; | |
629 | FILE *file; | |
630 | int nr_syms = 0; | |
631 | ||
439d473b | 632 | file = fopen(self->long_name, "r"); |
80d496be PE |
633 | if (file == NULL) |
634 | goto out_failure; | |
635 | ||
636 | while (!feof(file)) { | |
9cffa8d5 | 637 | u64 start, size; |
80d496be PE |
638 | struct symbol *sym; |
639 | int line_len, len; | |
640 | ||
641 | line_len = getline(&line, &n, file); | |
642 | if (line_len < 0) | |
643 | break; | |
644 | ||
645 | if (!line) | |
646 | goto out_failure; | |
647 | ||
648 | line[--line_len] = '\0'; /* \n */ | |
649 | ||
650 | len = hex2u64(line, &start); | |
651 | ||
652 | len++; | |
653 | if (len + 2 >= line_len) | |
654 | continue; | |
655 | ||
656 | len += hex2u64(line + len, &size); | |
657 | ||
658 | len++; | |
659 | if (len + 2 >= line_len) | |
660 | continue; | |
661 | ||
00a192b3 | 662 | sym = symbol__new(start, size, line + len); |
80d496be PE |
663 | |
664 | if (sym == NULL) | |
665 | goto out_delete_line; | |
666 | ||
439d473b | 667 | if (filter && filter(map, sym)) |
00a192b3 | 668 | symbol__delete(sym); |
80d496be | 669 | else { |
6a4694a4 | 670 | symbols__insert(&self->symbols[map->type], sym); |
80d496be PE |
671 | nr_syms++; |
672 | } | |
673 | } | |
674 | ||
675 | free(line); | |
676 | fclose(file); | |
677 | ||
678 | return nr_syms; | |
679 | ||
680 | out_delete_line: | |
681 | free(line); | |
682 | out_failure: | |
683 | return -1; | |
684 | } | |
685 | ||
a2928c42 ACM |
686 | /** |
687 | * elf_symtab__for_each_symbol - iterate thru all the symbols | |
688 | * | |
689 | * @self: struct elf_symtab instance to iterate | |
83a0944f | 690 | * @idx: uint32_t idx |
a2928c42 ACM |
691 | * @sym: GElf_Sym iterator |
692 | */ | |
83a0944f IM |
693 | #define elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) \ |
694 | for (idx = 0, gelf_getsym(syms, idx, &sym);\ | |
695 | idx < nr_syms; \ | |
696 | idx++, gelf_getsym(syms, idx, &sym)) | |
a2928c42 ACM |
697 | |
698 | static inline uint8_t elf_sym__type(const GElf_Sym *sym) | |
699 | { | |
700 | return GELF_ST_TYPE(sym->st_info); | |
701 | } | |
702 | ||
703 | static inline int elf_sym__is_function(const GElf_Sym *sym) | |
704 | { | |
705 | return elf_sym__type(sym) == STT_FUNC && | |
706 | sym->st_name != 0 && | |
81833130 | 707 | sym->st_shndx != SHN_UNDEF; |
a2928c42 ACM |
708 | } |
709 | ||
f1dfa0b1 ACM |
710 | static inline bool elf_sym__is_object(const GElf_Sym *sym) |
711 | { | |
712 | return elf_sym__type(sym) == STT_OBJECT && | |
713 | sym->st_name != 0 && | |
714 | sym->st_shndx != SHN_UNDEF; | |
715 | } | |
716 | ||
6cfcc53e MG |
717 | static inline int elf_sym__is_label(const GElf_Sym *sym) |
718 | { | |
719 | return elf_sym__type(sym) == STT_NOTYPE && | |
720 | sym->st_name != 0 && | |
721 | sym->st_shndx != SHN_UNDEF && | |
722 | sym->st_shndx != SHN_ABS; | |
723 | } | |
724 | ||
725 | static inline const char *elf_sec__name(const GElf_Shdr *shdr, | |
726 | const Elf_Data *secstrs) | |
727 | { | |
728 | return secstrs->d_buf + shdr->sh_name; | |
729 | } | |
730 | ||
731 | static inline int elf_sec__is_text(const GElf_Shdr *shdr, | |
732 | const Elf_Data *secstrs) | |
733 | { | |
734 | return strstr(elf_sec__name(shdr, secstrs), "text") != NULL; | |
735 | } | |
736 | ||
f1dfa0b1 ACM |
737 | static inline bool elf_sec__is_data(const GElf_Shdr *shdr, |
738 | const Elf_Data *secstrs) | |
739 | { | |
740 | return strstr(elf_sec__name(shdr, secstrs), "data") != NULL; | |
741 | } | |
742 | ||
a2928c42 ACM |
743 | static inline const char *elf_sym__name(const GElf_Sym *sym, |
744 | const Elf_Data *symstrs) | |
745 | { | |
746 | return symstrs->d_buf + sym->st_name; | |
747 | } | |
748 | ||
749 | static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, | |
750 | GElf_Shdr *shp, const char *name, | |
83a0944f | 751 | size_t *idx) |
a2928c42 ACM |
752 | { |
753 | Elf_Scn *sec = NULL; | |
754 | size_t cnt = 1; | |
755 | ||
756 | while ((sec = elf_nextscn(elf, sec)) != NULL) { | |
757 | char *str; | |
758 | ||
759 | gelf_getshdr(sec, shp); | |
760 | str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name); | |
761 | if (!strcmp(name, str)) { | |
83a0944f IM |
762 | if (idx) |
763 | *idx = cnt; | |
a2928c42 ACM |
764 | break; |
765 | } | |
766 | ++cnt; | |
767 | } | |
768 | ||
769 | return sec; | |
770 | } | |
771 | ||
8ce998d6 ACM |
772 | #define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \ |
773 | for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \ | |
774 | idx < nr_entries; \ | |
775 | ++idx, pos = gelf_getrel(reldata, idx, &pos_mem)) | |
776 | ||
777 | #define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \ | |
778 | for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \ | |
779 | idx < nr_entries; \ | |
780 | ++idx, pos = gelf_getrela(reldata, idx, &pos_mem)) | |
781 | ||
a25e46c4 ACM |
782 | /* |
783 | * We need to check if we have a .dynsym, so that we can handle the | |
784 | * .plt, synthesizing its symbols, that aren't on the symtabs (be it | |
785 | * .dynsym or .symtab). | |
786 | * And always look at the original dso, not at debuginfo packages, that | |
787 | * have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS). | |
788 | */ | |
82164161 ACM |
789 | static int dso__synthesize_plt_symbols(struct dso *self, struct map *map, |
790 | symbol_filter_t filter) | |
8ce998d6 ACM |
791 | { |
792 | uint32_t nr_rel_entries, idx; | |
793 | GElf_Sym sym; | |
9cffa8d5 | 794 | u64 plt_offset; |
8ce998d6 ACM |
795 | GElf_Shdr shdr_plt; |
796 | struct symbol *f; | |
a25e46c4 | 797 | GElf_Shdr shdr_rel_plt, shdr_dynsym; |
8ce998d6 | 798 | Elf_Data *reldata, *syms, *symstrs; |
a25e46c4 ACM |
799 | Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym; |
800 | size_t dynsym_idx; | |
801 | GElf_Ehdr ehdr; | |
8ce998d6 | 802 | char sympltname[1024]; |
a25e46c4 ACM |
803 | Elf *elf; |
804 | int nr = 0, symidx, fd, err = 0; | |
805 | ||
439d473b | 806 | fd = open(self->long_name, O_RDONLY); |
a25e46c4 ACM |
807 | if (fd < 0) |
808 | goto out; | |
809 | ||
84087126 | 810 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a25e46c4 ACM |
811 | if (elf == NULL) |
812 | goto out_close; | |
813 | ||
814 | if (gelf_getehdr(elf, &ehdr) == NULL) | |
815 | goto out_elf_end; | |
816 | ||
817 | scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym, | |
818 | ".dynsym", &dynsym_idx); | |
819 | if (scn_dynsym == NULL) | |
820 | goto out_elf_end; | |
8ce998d6 | 821 | |
a25e46c4 | 822 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
823 | ".rela.plt", NULL); |
824 | if (scn_plt_rel == NULL) { | |
a25e46c4 | 825 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
826 | ".rel.plt", NULL); |
827 | if (scn_plt_rel == NULL) | |
a25e46c4 | 828 | goto out_elf_end; |
8ce998d6 ACM |
829 | } |
830 | ||
a25e46c4 ACM |
831 | err = -1; |
832 | ||
8ce998d6 | 833 | if (shdr_rel_plt.sh_link != dynsym_idx) |
a25e46c4 | 834 | goto out_elf_end; |
8ce998d6 | 835 | |
a25e46c4 ACM |
836 | if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL) |
837 | goto out_elf_end; | |
8ce998d6 ACM |
838 | |
839 | /* | |
83a0944f | 840 | * Fetch the relocation section to find the idxes to the GOT |
8ce998d6 ACM |
841 | * and the symbols in the .dynsym they refer to. |
842 | */ | |
843 | reldata = elf_getdata(scn_plt_rel, NULL); | |
844 | if (reldata == NULL) | |
a25e46c4 | 845 | goto out_elf_end; |
8ce998d6 ACM |
846 | |
847 | syms = elf_getdata(scn_dynsym, NULL); | |
848 | if (syms == NULL) | |
a25e46c4 | 849 | goto out_elf_end; |
8ce998d6 | 850 | |
a25e46c4 | 851 | scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link); |
8ce998d6 | 852 | if (scn_symstrs == NULL) |
a25e46c4 | 853 | goto out_elf_end; |
8ce998d6 ACM |
854 | |
855 | symstrs = elf_getdata(scn_symstrs, NULL); | |
856 | if (symstrs == NULL) | |
a25e46c4 | 857 | goto out_elf_end; |
8ce998d6 ACM |
858 | |
859 | nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize; | |
860 | plt_offset = shdr_plt.sh_offset; | |
861 | ||
862 | if (shdr_rel_plt.sh_type == SHT_RELA) { | |
863 | GElf_Rela pos_mem, *pos; | |
864 | ||
865 | elf_section__for_each_rela(reldata, pos, pos_mem, idx, | |
866 | nr_rel_entries) { | |
867 | symidx = GELF_R_SYM(pos->r_info); | |
868 | plt_offset += shdr_plt.sh_entsize; | |
869 | gelf_getsym(syms, symidx, &sym); | |
870 | snprintf(sympltname, sizeof(sympltname), | |
871 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
872 | ||
873 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
00a192b3 | 874 | sympltname); |
8ce998d6 | 875 | if (!f) |
a25e46c4 | 876 | goto out_elf_end; |
8ce998d6 | 877 | |
82164161 ACM |
878 | if (filter && filter(map, f)) |
879 | symbol__delete(f); | |
880 | else { | |
6a4694a4 | 881 | symbols__insert(&self->symbols[map->type], f); |
82164161 ACM |
882 | ++nr; |
883 | } | |
8ce998d6 ACM |
884 | } |
885 | } else if (shdr_rel_plt.sh_type == SHT_REL) { | |
886 | GElf_Rel pos_mem, *pos; | |
887 | elf_section__for_each_rel(reldata, pos, pos_mem, idx, | |
888 | nr_rel_entries) { | |
889 | symidx = GELF_R_SYM(pos->r_info); | |
890 | plt_offset += shdr_plt.sh_entsize; | |
891 | gelf_getsym(syms, symidx, &sym); | |
892 | snprintf(sympltname, sizeof(sympltname), | |
893 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
894 | ||
895 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
00a192b3 | 896 | sympltname); |
8ce998d6 | 897 | if (!f) |
a25e46c4 | 898 | goto out_elf_end; |
8ce998d6 | 899 | |
82164161 ACM |
900 | if (filter && filter(map, f)) |
901 | symbol__delete(f); | |
902 | else { | |
6a4694a4 | 903 | symbols__insert(&self->symbols[map->type], f); |
82164161 ACM |
904 | ++nr; |
905 | } | |
8ce998d6 | 906 | } |
8ce998d6 ACM |
907 | } |
908 | ||
a25e46c4 ACM |
909 | err = 0; |
910 | out_elf_end: | |
911 | elf_end(elf); | |
912 | out_close: | |
913 | close(fd); | |
914 | ||
915 | if (err == 0) | |
916 | return nr; | |
917 | out: | |
fe2197b8 ACM |
918 | pr_debug("%s: problems reading %s PLT info.\n", |
919 | __func__, self->long_name); | |
a25e46c4 | 920 | return 0; |
8ce998d6 ACM |
921 | } |
922 | ||
d45868d3 ACM |
923 | static bool elf_sym__is_a(GElf_Sym *self, enum map_type type) |
924 | { | |
925 | switch (type) { | |
926 | case MAP__FUNCTION: | |
927 | return elf_sym__is_function(self); | |
f1dfa0b1 ACM |
928 | case MAP__VARIABLE: |
929 | return elf_sym__is_object(self); | |
d45868d3 ACM |
930 | default: |
931 | return false; | |
932 | } | |
933 | } | |
934 | ||
935 | static bool elf_sec__is_a(GElf_Shdr *self, Elf_Data *secstrs, enum map_type type) | |
936 | { | |
937 | switch (type) { | |
938 | case MAP__FUNCTION: | |
939 | return elf_sec__is_text(self, secstrs); | |
f1dfa0b1 ACM |
940 | case MAP__VARIABLE: |
941 | return elf_sec__is_data(self, secstrs); | |
d45868d3 ACM |
942 | default: |
943 | return false; | |
944 | } | |
945 | } | |
946 | ||
70c3856b EM |
947 | static size_t elf_addr_to_index(Elf *elf, GElf_Addr addr) |
948 | { | |
949 | Elf_Scn *sec = NULL; | |
950 | GElf_Shdr shdr; | |
951 | size_t cnt = 1; | |
952 | ||
953 | while ((sec = elf_nextscn(elf, sec)) != NULL) { | |
954 | gelf_getshdr(sec, &shdr); | |
955 | ||
956 | if ((addr >= shdr.sh_addr) && | |
957 | (addr < (shdr.sh_addr + shdr.sh_size))) | |
958 | return cnt; | |
959 | ||
960 | ++cnt; | |
961 | } | |
962 | ||
963 | return -1; | |
964 | } | |
965 | ||
9de89fe7 ACM |
966 | static int dso__load_sym(struct dso *self, struct map *map, const char *name, |
967 | int fd, symbol_filter_t filter, int kmodule) | |
a2928c42 | 968 | { |
9de89fe7 | 969 | struct kmap *kmap = self->kernel ? map__kmap(map) : NULL; |
2e538c4a ACM |
970 | struct map *curr_map = map; |
971 | struct dso *curr_dso = self; | |
6cfcc53e | 972 | Elf_Data *symstrs, *secstrs; |
a2928c42 ACM |
973 | uint32_t nr_syms; |
974 | int err = -1; | |
83a0944f | 975 | uint32_t idx; |
a2928c42 | 976 | GElf_Ehdr ehdr; |
70c3856b EM |
977 | GElf_Shdr shdr, opdshdr; |
978 | Elf_Data *syms, *opddata = NULL; | |
a2928c42 | 979 | GElf_Sym sym; |
70c3856b | 980 | Elf_Scn *sec, *sec_strndx, *opdsec; |
a2928c42 | 981 | Elf *elf; |
439d473b | 982 | int nr = 0; |
70c3856b | 983 | size_t opdidx = 0; |
a2928c42 | 984 | |
84087126 | 985 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a2928c42 | 986 | if (elf == NULL) { |
6beba7ad | 987 | pr_err("%s: cannot read %s ELF file.\n", __func__, name); |
a2928c42 ACM |
988 | goto out_close; |
989 | } | |
990 | ||
991 | if (gelf_getehdr(elf, &ehdr) == NULL) { | |
6beba7ad | 992 | pr_err("%s: cannot get elf header.\n", __func__); |
a2928c42 ACM |
993 | goto out_elf_end; |
994 | } | |
995 | ||
996 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL); | |
8ce998d6 | 997 | if (sec == NULL) { |
a25e46c4 ACM |
998 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL); |
999 | if (sec == NULL) | |
8ce998d6 | 1000 | goto out_elf_end; |
8ce998d6 | 1001 | } |
a2928c42 | 1002 | |
70c3856b EM |
1003 | opdsec = elf_section_by_name(elf, &ehdr, &opdshdr, ".opd", &opdidx); |
1004 | if (opdsec) | |
1005 | opddata = elf_rawdata(opdsec, NULL); | |
1006 | ||
a2928c42 ACM |
1007 | syms = elf_getdata(sec, NULL); |
1008 | if (syms == NULL) | |
1009 | goto out_elf_end; | |
1010 | ||
1011 | sec = elf_getscn(elf, shdr.sh_link); | |
1012 | if (sec == NULL) | |
1013 | goto out_elf_end; | |
1014 | ||
1015 | symstrs = elf_getdata(sec, NULL); | |
1016 | if (symstrs == NULL) | |
1017 | goto out_elf_end; | |
1018 | ||
6cfcc53e MG |
1019 | sec_strndx = elf_getscn(elf, ehdr.e_shstrndx); |
1020 | if (sec_strndx == NULL) | |
1021 | goto out_elf_end; | |
1022 | ||
1023 | secstrs = elf_getdata(sec_strndx, NULL); | |
9b30a26b | 1024 | if (secstrs == NULL) |
6cfcc53e MG |
1025 | goto out_elf_end; |
1026 | ||
a2928c42 ACM |
1027 | nr_syms = shdr.sh_size / shdr.sh_entsize; |
1028 | ||
e9fbc9dc | 1029 | memset(&sym, 0, sizeof(sym)); |
a1645ce1 | 1030 | if (self->kernel == DSO_TYPE_USER) { |
d20ff6bd | 1031 | self->adjust_symbols = (ehdr.e_type == ET_EXEC || |
30d7a77d ACM |
1032 | elf_section_by_name(elf, &ehdr, &shdr, |
1033 | ".gnu.prelink_undo", | |
1034 | NULL) != NULL); | |
d20ff6bd MG |
1035 | } else self->adjust_symbols = 0; |
1036 | ||
83a0944f | 1037 | elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) { |
a2928c42 | 1038 | struct symbol *f; |
56b03f3c | 1039 | const char *elf_name = elf_sym__name(&sym, symstrs); |
2e538c4a | 1040 | char *demangled = NULL; |
6cfcc53e MG |
1041 | int is_label = elf_sym__is_label(&sym); |
1042 | const char *section_name; | |
a2928c42 | 1043 | |
9de89fe7 ACM |
1044 | if (kmap && kmap->ref_reloc_sym && kmap->ref_reloc_sym->name && |
1045 | strcmp(elf_name, kmap->ref_reloc_sym->name) == 0) | |
1046 | kmap->ref_reloc_sym->unrelocated_addr = sym.st_value; | |
56b03f3c | 1047 | |
d45868d3 | 1048 | if (!is_label && !elf_sym__is_a(&sym, map->type)) |
a2928c42 ACM |
1049 | continue; |
1050 | ||
70c3856b EM |
1051 | if (opdsec && sym.st_shndx == opdidx) { |
1052 | u32 offset = sym.st_value - opdshdr.sh_addr; | |
1053 | u64 *opd = opddata->d_buf + offset; | |
1054 | sym.st_value = *opd; | |
1055 | sym.st_shndx = elf_addr_to_index(elf, sym.st_value); | |
1056 | } | |
1057 | ||
a2928c42 ACM |
1058 | sec = elf_getscn(elf, sym.st_shndx); |
1059 | if (!sec) | |
1060 | goto out_elf_end; | |
1061 | ||
1062 | gelf_getshdr(sec, &shdr); | |
6cfcc53e | 1063 | |
d45868d3 | 1064 | if (is_label && !elf_sec__is_a(&shdr, secstrs, map->type)) |
6cfcc53e MG |
1065 | continue; |
1066 | ||
1067 | section_name = elf_sec__name(&shdr, secstrs); | |
0b73da3f | 1068 | |
a1645ce1 | 1069 | if (self->kernel != DSO_TYPE_USER || kmodule) { |
2e538c4a ACM |
1070 | char dso_name[PATH_MAX]; |
1071 | ||
1072 | if (strcmp(section_name, | |
b63be8d7 ACM |
1073 | (curr_dso->short_name + |
1074 | self->short_name_len)) == 0) | |
2e538c4a ACM |
1075 | goto new_symbol; |
1076 | ||
1077 | if (strcmp(section_name, ".text") == 0) { | |
1078 | curr_map = map; | |
1079 | curr_dso = self; | |
1080 | goto new_symbol; | |
1081 | } | |
1082 | ||
1083 | snprintf(dso_name, sizeof(dso_name), | |
1084 | "%s%s", self->short_name, section_name); | |
1085 | ||
9de89fe7 | 1086 | curr_map = map_groups__find_by_name(kmap->kmaps, map->type, dso_name); |
2e538c4a ACM |
1087 | if (curr_map == NULL) { |
1088 | u64 start = sym.st_value; | |
1089 | ||
1090 | if (kmodule) | |
1091 | start += map->start + shdr.sh_offset; | |
1092 | ||
00a192b3 | 1093 | curr_dso = dso__new(dso_name); |
2e538c4a ACM |
1094 | if (curr_dso == NULL) |
1095 | goto out_elf_end; | |
a1645ce1 | 1096 | curr_dso->kernel = self->kernel; |
3610583c | 1097 | curr_map = map__new2(start, curr_dso, |
6275ce2d | 1098 | map->type); |
2e538c4a ACM |
1099 | if (curr_map == NULL) { |
1100 | dso__delete(curr_dso); | |
1101 | goto out_elf_end; | |
1102 | } | |
ed52ce2e ACM |
1103 | curr_map->map_ip = identity__map_ip; |
1104 | curr_map->unmap_ip = identity__map_ip; | |
b0a9ab62 | 1105 | curr_dso->origin = self->origin; |
9de89fe7 | 1106 | map_groups__insert(kmap->kmaps, curr_map); |
a1645ce1 | 1107 | dsos__add(&self->node, curr_dso); |
6275ce2d | 1108 | dso__set_loaded(curr_dso, map->type); |
2e538c4a ACM |
1109 | } else |
1110 | curr_dso = curr_map->dso; | |
1111 | ||
1112 | goto new_symbol; | |
af427bf5 ACM |
1113 | } |
1114 | ||
2e538c4a | 1115 | if (curr_dso->adjust_symbols) { |
29a9f66d ACM |
1116 | pr_debug4("%s: adjusting symbol: st_value: %#Lx " |
1117 | "sh_addr: %#Lx sh_offset: %#Lx\n", __func__, | |
1118 | (u64)sym.st_value, (u64)shdr.sh_addr, | |
1119 | (u64)shdr.sh_offset); | |
f5812a7a | 1120 | sym.st_value -= shdr.sh_addr - shdr.sh_offset; |
af427bf5 | 1121 | } |
28ac909b ACM |
1122 | /* |
1123 | * We need to figure out if the object was created from C++ sources | |
1124 | * DWARF DW_compile_unit has this, but we don't always have access | |
1125 | * to it... | |
1126 | */ | |
83a0944f | 1127 | demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI); |
28ac909b | 1128 | if (demangled != NULL) |
83a0944f | 1129 | elf_name = demangled; |
2e538c4a | 1130 | new_symbol: |
00a192b3 | 1131 | f = symbol__new(sym.st_value, sym.st_size, elf_name); |
28ac909b | 1132 | free(demangled); |
a2928c42 ACM |
1133 | if (!f) |
1134 | goto out_elf_end; | |
1135 | ||
2e538c4a | 1136 | if (filter && filter(curr_map, f)) |
00a192b3 | 1137 | symbol__delete(f); |
69ee69f6 | 1138 | else { |
6a4694a4 | 1139 | symbols__insert(&curr_dso->symbols[curr_map->type], f); |
69ee69f6 ACM |
1140 | nr++; |
1141 | } | |
a2928c42 ACM |
1142 | } |
1143 | ||
2e538c4a ACM |
1144 | /* |
1145 | * For misannotated, zeroed, ASM function sizes. | |
1146 | */ | |
6275ce2d | 1147 | if (nr > 0) { |
6a4694a4 | 1148 | symbols__fixup_end(&self->symbols[map->type]); |
6275ce2d ACM |
1149 | if (kmap) { |
1150 | /* | |
1151 | * We need to fixup this here too because we create new | |
1152 | * maps here, for things like vsyscall sections. | |
1153 | */ | |
1154 | __map_groups__fixup_end(kmap->kmaps, map->type); | |
1155 | } | |
1156 | } | |
a2928c42 ACM |
1157 | err = nr; |
1158 | out_elf_end: | |
1159 | elf_end(elf); | |
1160 | out_close: | |
1161 | return err; | |
1162 | } | |
1163 | ||
78075caa ACM |
1164 | static bool dso__build_id_equal(const struct dso *self, u8 *build_id) |
1165 | { | |
1166 | return memcmp(self->build_id, build_id, sizeof(self->build_id)) == 0; | |
1167 | } | |
1168 | ||
a1645ce1 | 1169 | bool __dsos__read_build_ids(struct list_head *head, bool with_hits) |
57f395a7 | 1170 | { |
e30a3d12 | 1171 | bool have_build_id = false; |
57f395a7 FW |
1172 | struct dso *pos; |
1173 | ||
6122e4e4 ACM |
1174 | list_for_each_entry(pos, head, node) { |
1175 | if (with_hits && !pos->hit) | |
1176 | continue; | |
f6e1467d ACM |
1177 | if (pos->has_build_id) { |
1178 | have_build_id = true; | |
1179 | continue; | |
1180 | } | |
e30a3d12 ACM |
1181 | if (filename__read_build_id(pos->long_name, pos->build_id, |
1182 | sizeof(pos->build_id)) > 0) { | |
1183 | have_build_id = true; | |
1184 | pos->has_build_id = true; | |
1185 | } | |
6122e4e4 | 1186 | } |
57f395a7 | 1187 | |
e30a3d12 | 1188 | return have_build_id; |
57f395a7 FW |
1189 | } |
1190 | ||
fd7a346e ACM |
1191 | /* |
1192 | * Align offset to 4 bytes as needed for note name and descriptor data. | |
1193 | */ | |
1194 | #define NOTE_ALIGN(n) (((n) + 3) & -4U) | |
1195 | ||
2643ce11 | 1196 | int filename__read_build_id(const char *filename, void *bf, size_t size) |
4d1e00a8 | 1197 | { |
2643ce11 | 1198 | int fd, err = -1; |
4d1e00a8 ACM |
1199 | GElf_Ehdr ehdr; |
1200 | GElf_Shdr shdr; | |
fd7a346e | 1201 | Elf_Data *data; |
4d1e00a8 | 1202 | Elf_Scn *sec; |
e57cfcda | 1203 | Elf_Kind ek; |
fd7a346e | 1204 | void *ptr; |
4d1e00a8 | 1205 | Elf *elf; |
4d1e00a8 | 1206 | |
2643ce11 ACM |
1207 | if (size < BUILD_ID_SIZE) |
1208 | goto out; | |
1209 | ||
1210 | fd = open(filename, O_RDONLY); | |
4d1e00a8 ACM |
1211 | if (fd < 0) |
1212 | goto out; | |
1213 | ||
84087126 | 1214 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
4d1e00a8 | 1215 | if (elf == NULL) { |
8d06367f | 1216 | pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename); |
4d1e00a8 ACM |
1217 | goto out_close; |
1218 | } | |
1219 | ||
e57cfcda PE |
1220 | ek = elf_kind(elf); |
1221 | if (ek != ELF_K_ELF) | |
1222 | goto out_elf_end; | |
1223 | ||
4d1e00a8 | 1224 | if (gelf_getehdr(elf, &ehdr) == NULL) { |
6beba7ad | 1225 | pr_err("%s: cannot get elf header.\n", __func__); |
4d1e00a8 ACM |
1226 | goto out_elf_end; |
1227 | } | |
1228 | ||
2643ce11 ACM |
1229 | sec = elf_section_by_name(elf, &ehdr, &shdr, |
1230 | ".note.gnu.build-id", NULL); | |
fd7a346e ACM |
1231 | if (sec == NULL) { |
1232 | sec = elf_section_by_name(elf, &ehdr, &shdr, | |
1233 | ".notes", NULL); | |
1234 | if (sec == NULL) | |
1235 | goto out_elf_end; | |
1236 | } | |
4d1e00a8 | 1237 | |
fd7a346e ACM |
1238 | data = elf_getdata(sec, NULL); |
1239 | if (data == NULL) | |
4d1e00a8 | 1240 | goto out_elf_end; |
fd7a346e ACM |
1241 | |
1242 | ptr = data->d_buf; | |
1243 | while (ptr < (data->d_buf + data->d_size)) { | |
1244 | GElf_Nhdr *nhdr = ptr; | |
1245 | int namesz = NOTE_ALIGN(nhdr->n_namesz), | |
1246 | descsz = NOTE_ALIGN(nhdr->n_descsz); | |
1247 | const char *name; | |
1248 | ||
1249 | ptr += sizeof(*nhdr); | |
1250 | name = ptr; | |
1251 | ptr += namesz; | |
1252 | if (nhdr->n_type == NT_GNU_BUILD_ID && | |
1253 | nhdr->n_namesz == sizeof("GNU")) { | |
1254 | if (memcmp(name, "GNU", sizeof("GNU")) == 0) { | |
1255 | memcpy(bf, ptr, BUILD_ID_SIZE); | |
1256 | err = BUILD_ID_SIZE; | |
1257 | break; | |
1258 | } | |
1259 | } | |
1260 | ptr += descsz; | |
1261 | } | |
2643ce11 ACM |
1262 | out_elf_end: |
1263 | elf_end(elf); | |
1264 | out_close: | |
1265 | close(fd); | |
1266 | out: | |
1267 | return err; | |
1268 | } | |
1269 | ||
f1617b40 ACM |
1270 | int sysfs__read_build_id(const char *filename, void *build_id, size_t size) |
1271 | { | |
1272 | int fd, err = -1; | |
1273 | ||
1274 | if (size < BUILD_ID_SIZE) | |
1275 | goto out; | |
1276 | ||
1277 | fd = open(filename, O_RDONLY); | |
1278 | if (fd < 0) | |
1279 | goto out; | |
1280 | ||
1281 | while (1) { | |
1282 | char bf[BUFSIZ]; | |
1283 | GElf_Nhdr nhdr; | |
1284 | int namesz, descsz; | |
1285 | ||
1286 | if (read(fd, &nhdr, sizeof(nhdr)) != sizeof(nhdr)) | |
1287 | break; | |
1288 | ||
fd7a346e ACM |
1289 | namesz = NOTE_ALIGN(nhdr.n_namesz); |
1290 | descsz = NOTE_ALIGN(nhdr.n_descsz); | |
f1617b40 ACM |
1291 | if (nhdr.n_type == NT_GNU_BUILD_ID && |
1292 | nhdr.n_namesz == sizeof("GNU")) { | |
1293 | if (read(fd, bf, namesz) != namesz) | |
1294 | break; | |
1295 | if (memcmp(bf, "GNU", sizeof("GNU")) == 0) { | |
1296 | if (read(fd, build_id, | |
1297 | BUILD_ID_SIZE) == BUILD_ID_SIZE) { | |
1298 | err = 0; | |
1299 | break; | |
1300 | } | |
1301 | } else if (read(fd, bf, descsz) != descsz) | |
1302 | break; | |
1303 | } else { | |
1304 | int n = namesz + descsz; | |
1305 | if (read(fd, bf, n) != n) | |
1306 | break; | |
1307 | } | |
1308 | } | |
1309 | close(fd); | |
1310 | out: | |
1311 | return err; | |
1312 | } | |
1313 | ||
94cb9e38 ACM |
1314 | char dso__symtab_origin(const struct dso *self) |
1315 | { | |
1316 | static const char origin[] = { | |
1317 | [DSO__ORIG_KERNEL] = 'k', | |
1318 | [DSO__ORIG_JAVA_JIT] = 'j', | |
4cf40131 | 1319 | [DSO__ORIG_BUILD_ID_CACHE] = 'B', |
94cb9e38 ACM |
1320 | [DSO__ORIG_FEDORA] = 'f', |
1321 | [DSO__ORIG_UBUNTU] = 'u', | |
1322 | [DSO__ORIG_BUILDID] = 'b', | |
1323 | [DSO__ORIG_DSO] = 'd', | |
439d473b | 1324 | [DSO__ORIG_KMODULE] = 'K', |
a1645ce1 ZY |
1325 | [DSO__ORIG_GUEST_KERNEL] = 'g', |
1326 | [DSO__ORIG_GUEST_KMODULE] = 'G', | |
94cb9e38 ACM |
1327 | }; |
1328 | ||
1329 | if (self == NULL || self->origin == DSO__ORIG_NOT_FOUND) | |
1330 | return '!'; | |
1331 | return origin[self->origin]; | |
1332 | } | |
1333 | ||
9de89fe7 | 1334 | int dso__load(struct dso *self, struct map *map, symbol_filter_t filter) |
a2928c42 | 1335 | { |
4d1e00a8 | 1336 | int size = PATH_MAX; |
c338aee8 | 1337 | char *name; |
d3379ab9 | 1338 | u8 build_id[BUILD_ID_SIZE]; |
a2928c42 ACM |
1339 | int ret = -1; |
1340 | int fd; | |
23346f21 | 1341 | struct machine *machine; |
a1645ce1 | 1342 | const char *root_dir; |
a2928c42 | 1343 | |
3610583c | 1344 | dso__set_loaded(self, map->type); |
66bd8424 | 1345 | |
a1645ce1 | 1346 | if (self->kernel == DSO_TYPE_KERNEL) |
9de89fe7 | 1347 | return dso__load_kernel_sym(self, map, filter); |
a1645ce1 ZY |
1348 | else if (self->kernel == DSO_TYPE_GUEST_KERNEL) |
1349 | return dso__load_guest_kernel_sym(self, map, filter); | |
1350 | ||
23346f21 ACM |
1351 | if (map->groups && map->groups->machine) |
1352 | machine = map->groups->machine; | |
a1645ce1 | 1353 | else |
23346f21 | 1354 | machine = NULL; |
c338aee8 ACM |
1355 | |
1356 | name = malloc(size); | |
a2928c42 ACM |
1357 | if (!name) |
1358 | return -1; | |
1359 | ||
30d7a77d | 1360 | self->adjust_symbols = 0; |
f5812a7a | 1361 | |
94cb9e38 | 1362 | if (strncmp(self->name, "/tmp/perf-", 10) == 0) { |
6beba7ad | 1363 | ret = dso__load_perf_map(self, map, filter); |
94cb9e38 ACM |
1364 | self->origin = ret > 0 ? DSO__ORIG_JAVA_JIT : |
1365 | DSO__ORIG_NOT_FOUND; | |
1366 | return ret; | |
1367 | } | |
1368 | ||
4cf40131 | 1369 | self->origin = DSO__ORIG_BUILD_ID_CACHE; |
b36f19d5 | 1370 | if (dso__build_id_filename(self, name, size) != NULL) |
4cf40131 | 1371 | goto open_file; |
a2928c42 ACM |
1372 | more: |
1373 | do { | |
94cb9e38 ACM |
1374 | self->origin++; |
1375 | switch (self->origin) { | |
1376 | case DSO__ORIG_FEDORA: | |
439d473b ACM |
1377 | snprintf(name, size, "/usr/lib/debug%s.debug", |
1378 | self->long_name); | |
a2928c42 | 1379 | break; |
94cb9e38 | 1380 | case DSO__ORIG_UBUNTU: |
439d473b ACM |
1381 | snprintf(name, size, "/usr/lib/debug%s", |
1382 | self->long_name); | |
a2928c42 | 1383 | break; |
94cb9e38 | 1384 | case DSO__ORIG_BUILDID: |
d3379ab9 ACM |
1385 | if (filename__read_build_id(self->long_name, build_id, |
1386 | sizeof(build_id))) { | |
b36f19d5 | 1387 | char build_id_hex[BUILD_ID_SIZE * 2 + 1]; |
d3379ab9 ACM |
1388 | build_id__sprintf(build_id, sizeof(build_id), |
1389 | build_id_hex); | |
4d1e00a8 ACM |
1390 | snprintf(name, size, |
1391 | "/usr/lib/debug/.build-id/%.2s/%s.debug", | |
d3379ab9 ACM |
1392 | build_id_hex, build_id_hex + 2); |
1393 | if (self->has_build_id) | |
1394 | goto compare_build_id; | |
1395 | break; | |
4d1e00a8 | 1396 | } |
94cb9e38 | 1397 | self->origin++; |
4d1e00a8 | 1398 | /* Fall thru */ |
94cb9e38 | 1399 | case DSO__ORIG_DSO: |
439d473b | 1400 | snprintf(name, size, "%s", self->long_name); |
a2928c42 | 1401 | break; |
a1645ce1 | 1402 | case DSO__ORIG_GUEST_KMODULE: |
23346f21 ACM |
1403 | if (map->groups && map->groups->machine) |
1404 | root_dir = map->groups->machine->root_dir; | |
a1645ce1 ZY |
1405 | else |
1406 | root_dir = ""; | |
1407 | snprintf(name, size, "%s%s", root_dir, self->long_name); | |
1408 | break; | |
a2928c42 ACM |
1409 | |
1410 | default: | |
1411 | goto out; | |
1412 | } | |
a2928c42 | 1413 | |
8d06367f | 1414 | if (self->has_build_id) { |
d3379ab9 ACM |
1415 | if (filename__read_build_id(name, build_id, |
1416 | sizeof(build_id)) < 0) | |
8d06367f | 1417 | goto more; |
8d06367f | 1418 | compare_build_id: |
78075caa | 1419 | if (!dso__build_id_equal(self, build_id)) |
8d06367f ACM |
1420 | goto more; |
1421 | } | |
4cf40131 | 1422 | open_file: |
a2928c42 ACM |
1423 | fd = open(name, O_RDONLY); |
1424 | } while (fd < 0); | |
1425 | ||
9de89fe7 | 1426 | ret = dso__load_sym(self, map, name, fd, filter, 0); |
a2928c42 ACM |
1427 | close(fd); |
1428 | ||
1429 | /* | |
1430 | * Some people seem to have debuginfo files _WITHOUT_ debug info!?!? | |
1431 | */ | |
1432 | if (!ret) | |
1433 | goto more; | |
1434 | ||
a25e46c4 | 1435 | if (ret > 0) { |
82164161 | 1436 | int nr_plt = dso__synthesize_plt_symbols(self, map, filter); |
a25e46c4 ACM |
1437 | if (nr_plt > 0) |
1438 | ret += nr_plt; | |
1439 | } | |
a2928c42 ACM |
1440 | out: |
1441 | free(name); | |
1340e6bb ACM |
1442 | if (ret < 0 && strstr(self->name, " (deleted)") != NULL) |
1443 | return 0; | |
a2928c42 ACM |
1444 | return ret; |
1445 | } | |
1446 | ||
79406cd7 ACM |
1447 | struct map *map_groups__find_by_name(struct map_groups *self, |
1448 | enum map_type type, const char *name) | |
439d473b ACM |
1449 | { |
1450 | struct rb_node *nd; | |
1451 | ||
79406cd7 | 1452 | for (nd = rb_first(&self->maps[type]); nd; nd = rb_next(nd)) { |
439d473b ACM |
1453 | struct map *map = rb_entry(nd, struct map, rb_node); |
1454 | ||
b7cece76 | 1455 | if (map->dso && strcmp(map->dso->short_name, name) == 0) |
439d473b ACM |
1456 | return map; |
1457 | } | |
1458 | ||
1459 | return NULL; | |
1460 | } | |
1461 | ||
a1645ce1 ZY |
1462 | static int dso__kernel_module_get_build_id(struct dso *self, |
1463 | const char *root_dir) | |
b7cece76 ACM |
1464 | { |
1465 | char filename[PATH_MAX]; | |
1466 | /* | |
1467 | * kernel module short names are of the form "[module]" and | |
1468 | * we need just "module" here. | |
1469 | */ | |
1470 | const char *name = self->short_name + 1; | |
1471 | ||
1472 | snprintf(filename, sizeof(filename), | |
a1645ce1 ZY |
1473 | "%s/sys/module/%.*s/notes/.note.gnu.build-id", |
1474 | root_dir, (int)strlen(name) - 1, name); | |
b7cece76 ACM |
1475 | |
1476 | if (sysfs__read_build_id(filename, self->build_id, | |
1477 | sizeof(self->build_id)) == 0) | |
1478 | self->has_build_id = true; | |
1479 | ||
1480 | return 0; | |
1481 | } | |
1482 | ||
a1645ce1 ZY |
1483 | static int map_groups__set_modules_path_dir(struct map_groups *self, |
1484 | const char *dir_name) | |
6cfcc53e | 1485 | { |
439d473b | 1486 | struct dirent *dent; |
5aab621b | 1487 | DIR *dir = opendir(dir_name); |
6cfcc53e | 1488 | |
439d473b | 1489 | if (!dir) { |
5aab621b | 1490 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); |
439d473b ACM |
1491 | return -1; |
1492 | } | |
6cfcc53e | 1493 | |
439d473b ACM |
1494 | while ((dent = readdir(dir)) != NULL) { |
1495 | char path[PATH_MAX]; | |
a1645ce1 ZY |
1496 | struct stat st; |
1497 | ||
1498 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
1499 | sprintf(path, "%s/%s", dir_name, dent->d_name); | |
1500 | if (stat(path, &st)) | |
1501 | continue; | |
439d473b | 1502 | |
a1645ce1 | 1503 | if (S_ISDIR(st.st_mode)) { |
439d473b ACM |
1504 | if (!strcmp(dent->d_name, ".") || |
1505 | !strcmp(dent->d_name, "..")) | |
1506 | continue; | |
1507 | ||
1508 | snprintf(path, sizeof(path), "%s/%s", | |
5aab621b | 1509 | dir_name, dent->d_name); |
9de89fe7 | 1510 | if (map_groups__set_modules_path_dir(self, path) < 0) |
439d473b ACM |
1511 | goto failure; |
1512 | } else { | |
1513 | char *dot = strrchr(dent->d_name, '.'), | |
1514 | dso_name[PATH_MAX]; | |
1515 | struct map *map; | |
cfc10d3b | 1516 | char *long_name; |
439d473b ACM |
1517 | |
1518 | if (dot == NULL || strcmp(dot, ".ko")) | |
1519 | continue; | |
1520 | snprintf(dso_name, sizeof(dso_name), "[%.*s]", | |
1521 | (int)(dot - dent->d_name), dent->d_name); | |
1522 | ||
a2a99e8e | 1523 | strxfrchar(dso_name, '-', '_'); |
9de89fe7 | 1524 | map = map_groups__find_by_name(self, MAP__FUNCTION, dso_name); |
439d473b ACM |
1525 | if (map == NULL) |
1526 | continue; | |
1527 | ||
1528 | snprintf(path, sizeof(path), "%s/%s", | |
5aab621b | 1529 | dir_name, dent->d_name); |
439d473b | 1530 | |
cfc10d3b ACM |
1531 | long_name = strdup(path); |
1532 | if (long_name == NULL) | |
439d473b | 1533 | goto failure; |
cfc10d3b | 1534 | dso__set_long_name(map->dso, long_name); |
6e406257 | 1535 | map->dso->lname_alloc = 1; |
a1645ce1 | 1536 | dso__kernel_module_get_build_id(map->dso, ""); |
439d473b | 1537 | } |
439d473b | 1538 | } |
6cfcc53e | 1539 | |
c338aee8 | 1540 | return 0; |
439d473b ACM |
1541 | failure: |
1542 | closedir(dir); | |
1543 | return -1; | |
1544 | } | |
6cfcc53e | 1545 | |
a1645ce1 | 1546 | static char *get_kernel_version(const char *root_dir) |
439d473b | 1547 | { |
a1645ce1 ZY |
1548 | char version[PATH_MAX]; |
1549 | FILE *file; | |
1550 | char *name, *tmp; | |
1551 | const char *prefix = "Linux version "; | |
1552 | ||
1553 | sprintf(version, "%s/proc/version", root_dir); | |
1554 | file = fopen(version, "r"); | |
1555 | if (!file) | |
1556 | return NULL; | |
1557 | ||
1558 | version[0] = '\0'; | |
1559 | tmp = fgets(version, sizeof(version), file); | |
1560 | fclose(file); | |
1561 | ||
1562 | name = strstr(version, prefix); | |
1563 | if (!name) | |
1564 | return NULL; | |
1565 | name += strlen(prefix); | |
1566 | tmp = strchr(name, ' '); | |
1567 | if (tmp) | |
1568 | *tmp = '\0'; | |
1569 | ||
1570 | return strdup(name); | |
1571 | } | |
1572 | ||
d28c6223 | 1573 | static int machine__set_modules_path(struct machine *self) |
a1645ce1 ZY |
1574 | { |
1575 | char *version; | |
439d473b | 1576 | char modules_path[PATH_MAX]; |
6cfcc53e | 1577 | |
d28c6223 | 1578 | version = get_kernel_version(self->root_dir); |
a1645ce1 | 1579 | if (!version) |
439d473b | 1580 | return -1; |
6cfcc53e | 1581 | |
a1645ce1 | 1582 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s/kernel", |
d28c6223 | 1583 | self->root_dir, version); |
a1645ce1 | 1584 | free(version); |
6cfcc53e | 1585 | |
d28c6223 | 1586 | return map_groups__set_modules_path_dir(&self->kmaps, modules_path); |
6cfcc53e MG |
1587 | } |
1588 | ||
439d473b ACM |
1589 | /* |
1590 | * Constructor variant for modules (where we know from /proc/modules where | |
1591 | * they are loaded) and for vmlinux, where only after we load all the | |
1592 | * symbols we'll know where it starts and ends. | |
1593 | */ | |
3610583c | 1594 | static struct map *map__new2(u64 start, struct dso *dso, enum map_type type) |
6cfcc53e | 1595 | { |
5aab621b ACM |
1596 | struct map *self = calloc(1, (sizeof(*self) + |
1597 | (dso->kernel ? sizeof(struct kmap) : 0))); | |
439d473b | 1598 | if (self != NULL) { |
439d473b | 1599 | /* |
afb7b4f0 | 1600 | * ->end will be filled after we load all the symbols |
439d473b | 1601 | */ |
3610583c | 1602 | map__init(self, type, start, 0, 0, dso); |
439d473b | 1603 | } |
afb7b4f0 | 1604 | |
439d473b ACM |
1605 | return self; |
1606 | } | |
1607 | ||
d28c6223 ACM |
1608 | struct map *machine__new_module(struct machine *self, u64 start, |
1609 | const char *filename) | |
b7cece76 ACM |
1610 | { |
1611 | struct map *map; | |
d28c6223 | 1612 | struct dso *dso = __dsos__findnew(&self->kernel_dsos, filename); |
b7cece76 ACM |
1613 | |
1614 | if (dso == NULL) | |
1615 | return NULL; | |
1616 | ||
1617 | map = map__new2(start, dso, MAP__FUNCTION); | |
1618 | if (map == NULL) | |
1619 | return NULL; | |
1620 | ||
d28c6223 | 1621 | if (machine__is_host(self)) |
a1645ce1 ZY |
1622 | dso->origin = DSO__ORIG_KMODULE; |
1623 | else | |
1624 | dso->origin = DSO__ORIG_GUEST_KMODULE; | |
d28c6223 | 1625 | map_groups__insert(&self->kmaps, map); |
b7cece76 ACM |
1626 | return map; |
1627 | } | |
1628 | ||
d28c6223 | 1629 | static int machine__create_modules(struct machine *self) |
439d473b ACM |
1630 | { |
1631 | char *line = NULL; | |
1632 | size_t n; | |
a1645ce1 | 1633 | FILE *file; |
439d473b | 1634 | struct map *map; |
a1645ce1 ZY |
1635 | const char *modules; |
1636 | char path[PATH_MAX]; | |
1637 | ||
d28c6223 | 1638 | if (machine__is_default_guest(self)) |
a1645ce1 ZY |
1639 | modules = symbol_conf.default_guest_modules; |
1640 | else { | |
d28c6223 | 1641 | sprintf(path, "%s/proc/modules", self->root_dir); |
a1645ce1 ZY |
1642 | modules = path; |
1643 | } | |
6cfcc53e | 1644 | |
a1645ce1 | 1645 | file = fopen(modules, "r"); |
439d473b ACM |
1646 | if (file == NULL) |
1647 | return -1; | |
6cfcc53e | 1648 | |
439d473b ACM |
1649 | while (!feof(file)) { |
1650 | char name[PATH_MAX]; | |
1651 | u64 start; | |
439d473b ACM |
1652 | char *sep; |
1653 | int line_len; | |
6cfcc53e | 1654 | |
439d473b ACM |
1655 | line_len = getline(&line, &n, file); |
1656 | if (line_len < 0) | |
1657 | break; | |
1658 | ||
1659 | if (!line) | |
1660 | goto out_failure; | |
1661 | ||
1662 | line[--line_len] = '\0'; /* \n */ | |
1663 | ||
1664 | sep = strrchr(line, 'x'); | |
1665 | if (sep == NULL) | |
1666 | continue; | |
1667 | ||
1668 | hex2u64(sep + 1, &start); | |
1669 | ||
1670 | sep = strchr(line, ' '); | |
1671 | if (sep == NULL) | |
1672 | continue; | |
1673 | ||
1674 | *sep = '\0'; | |
1675 | ||
1676 | snprintf(name, sizeof(name), "[%s]", line); | |
d28c6223 | 1677 | map = machine__new_module(self, start, name); |
b7cece76 | 1678 | if (map == NULL) |
439d473b | 1679 | goto out_delete_line; |
d28c6223 | 1680 | dso__kernel_module_get_build_id(map->dso, self->root_dir); |
6cfcc53e | 1681 | } |
439d473b ACM |
1682 | |
1683 | free(line); | |
1684 | fclose(file); | |
1685 | ||
d28c6223 | 1686 | return machine__set_modules_path(self); |
439d473b ACM |
1687 | |
1688 | out_delete_line: | |
1689 | free(line); | |
1690 | out_failure: | |
1691 | return -1; | |
6cfcc53e MG |
1692 | } |
1693 | ||
9958e1f0 | 1694 | static int dso__load_vmlinux(struct dso *self, struct map *map, |
6beba7ad | 1695 | const char *vmlinux, symbol_filter_t filter) |
a2928c42 | 1696 | { |
fbd733b8 | 1697 | int err = -1, fd; |
a2928c42 | 1698 | |
fbd733b8 ACM |
1699 | if (self->has_build_id) { |
1700 | u8 build_id[BUILD_ID_SIZE]; | |
1701 | ||
1702 | if (filename__read_build_id(vmlinux, build_id, | |
1703 | sizeof(build_id)) < 0) { | |
1704 | pr_debug("No build_id in %s, ignoring it\n", vmlinux); | |
1705 | return -1; | |
1706 | } | |
1707 | if (!dso__build_id_equal(self, build_id)) { | |
1708 | char expected_build_id[BUILD_ID_SIZE * 2 + 1], | |
1709 | vmlinux_build_id[BUILD_ID_SIZE * 2 + 1]; | |
1710 | ||
1711 | build_id__sprintf(self->build_id, | |
1712 | sizeof(self->build_id), | |
1713 | expected_build_id); | |
1714 | build_id__sprintf(build_id, sizeof(build_id), | |
1715 | vmlinux_build_id); | |
1716 | pr_debug("build_id in %s is %s while expected is %s, " | |
1717 | "ignoring it\n", vmlinux, vmlinux_build_id, | |
1718 | expected_build_id); | |
1719 | return -1; | |
1720 | } | |
1721 | } | |
66bd8424 | 1722 | |
fbd733b8 | 1723 | fd = open(vmlinux, O_RDONLY); |
a2928c42 ACM |
1724 | if (fd < 0) |
1725 | return -1; | |
1726 | ||
3610583c | 1727 | dso__set_loaded(self, map->type); |
9de89fe7 | 1728 | err = dso__load_sym(self, map, vmlinux, fd, filter, 0); |
a2928c42 ACM |
1729 | close(fd); |
1730 | ||
3846df2e ACM |
1731 | if (err > 0) |
1732 | pr_debug("Using %s for symbols\n", vmlinux); | |
1733 | ||
a2928c42 ACM |
1734 | return err; |
1735 | } | |
1736 | ||
a19afe46 | 1737 | int dso__load_vmlinux_path(struct dso *self, struct map *map, |
9de89fe7 | 1738 | symbol_filter_t filter) |
a19afe46 ACM |
1739 | { |
1740 | int i, err = 0; | |
5ad90e4e | 1741 | char *filename; |
a19afe46 ACM |
1742 | |
1743 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", | |
5ad90e4e ACM |
1744 | vmlinux_path__nr_entries + 1); |
1745 | ||
1746 | filename = dso__build_id_filename(self, NULL, 0); | |
1747 | if (filename != NULL) { | |
1748 | err = dso__load_vmlinux(self, map, filename, filter); | |
1749 | if (err > 0) { | |
1750 | dso__set_long_name(self, filename); | |
1751 | goto out; | |
1752 | } | |
1753 | free(filename); | |
1754 | } | |
a19afe46 ACM |
1755 | |
1756 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { | |
9de89fe7 | 1757 | err = dso__load_vmlinux(self, map, vmlinux_path[i], filter); |
a19afe46 | 1758 | if (err > 0) { |
a19afe46 ACM |
1759 | dso__set_long_name(self, strdup(vmlinux_path[i])); |
1760 | break; | |
1761 | } | |
1762 | } | |
5ad90e4e | 1763 | out: |
a19afe46 ACM |
1764 | return err; |
1765 | } | |
1766 | ||
c338aee8 | 1767 | static int dso__load_kernel_sym(struct dso *self, struct map *map, |
9de89fe7 | 1768 | symbol_filter_t filter) |
a827c875 | 1769 | { |
cc612d81 | 1770 | int err; |
9e201442 ACM |
1771 | const char *kallsyms_filename = NULL; |
1772 | char *kallsyms_allocated_filename = NULL; | |
dc8d6ab2 ACM |
1773 | /* |
1774 | * Step 1: if the user specified a vmlinux filename, use it and only | |
1775 | * it, reporting errors to the user if it cannot be used. | |
1776 | * | |
1777 | * For instance, try to analyse an ARM perf.data file _without_ a | |
1778 | * build-id, or if the user specifies the wrong path to the right | |
1779 | * vmlinux file, obviously we can't fallback to another vmlinux (a | |
1780 | * x86_86 one, on the machine where analysis is being performed, say), | |
1781 | * or worse, /proc/kallsyms. | |
1782 | * | |
1783 | * If the specified file _has_ a build-id and there is a build-id | |
1784 | * section in the perf.data file, we will still do the expected | |
1785 | * validation in dso__load_vmlinux and will bail out if they don't | |
1786 | * match. | |
1787 | */ | |
1788 | if (symbol_conf.vmlinux_name != NULL) { | |
9de89fe7 | 1789 | err = dso__load_vmlinux(self, map, |
dc8d6ab2 | 1790 | symbol_conf.vmlinux_name, filter); |
e7dadc00 ACM |
1791 | if (err > 0) { |
1792 | dso__set_long_name(self, | |
1793 | strdup(symbol_conf.vmlinux_name)); | |
1794 | goto out_fixup; | |
1795 | } | |
1796 | return err; | |
dc8d6ab2 | 1797 | } |
cc612d81 ACM |
1798 | |
1799 | if (vmlinux_path != NULL) { | |
9de89fe7 | 1800 | err = dso__load_vmlinux_path(self, map, filter); |
a19afe46 ACM |
1801 | if (err > 0) |
1802 | goto out_fixup; | |
cc612d81 ACM |
1803 | } |
1804 | ||
b7cece76 ACM |
1805 | /* |
1806 | * Say the kernel DSO was created when processing the build-id header table, | |
1807 | * we have a build-id, so check if it is the same as the running kernel, | |
1808 | * using it if it is. | |
1809 | */ | |
1810 | if (self->has_build_id) { | |
1811 | u8 kallsyms_build_id[BUILD_ID_SIZE]; | |
9e201442 | 1812 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; |
b7cece76 ACM |
1813 | |
1814 | if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id, | |
8d0591f6 | 1815 | sizeof(kallsyms_build_id)) == 0) { |
9e201442 ACM |
1816 | if (dso__build_id_equal(self, kallsyms_build_id)) { |
1817 | kallsyms_filename = "/proc/kallsyms"; | |
8d0591f6 | 1818 | goto do_kallsyms; |
9e201442 | 1819 | } |
8d0591f6 | 1820 | } |
dc8d6ab2 ACM |
1821 | /* |
1822 | * Now look if we have it on the build-id cache in | |
1823 | * $HOME/.debug/[kernel.kallsyms]. | |
1824 | */ | |
9e201442 ACM |
1825 | build_id__sprintf(self->build_id, sizeof(self->build_id), |
1826 | sbuild_id); | |
1827 | ||
1828 | if (asprintf(&kallsyms_allocated_filename, | |
1829 | "%s/.debug/[kernel.kallsyms]/%s", | |
3846df2e ACM |
1830 | getenv("HOME"), sbuild_id) == -1) { |
1831 | pr_err("Not enough memory for kallsyms file lookup\n"); | |
dc8d6ab2 | 1832 | return -1; |
3846df2e | 1833 | } |
dc8d6ab2 | 1834 | |
19fc2ded ACM |
1835 | kallsyms_filename = kallsyms_allocated_filename; |
1836 | ||
dc8d6ab2 | 1837 | if (access(kallsyms_filename, F_OK)) { |
3846df2e ACM |
1838 | pr_err("No kallsyms or vmlinux with build-id %s " |
1839 | "was found\n", sbuild_id); | |
9e201442 | 1840 | free(kallsyms_allocated_filename); |
dc8d6ab2 | 1841 | return -1; |
9e201442 | 1842 | } |
dc8d6ab2 ACM |
1843 | } else { |
1844 | /* | |
1845 | * Last resort, if we don't have a build-id and couldn't find | |
1846 | * any vmlinux file, try the running kernel kallsyms table. | |
1847 | */ | |
9e201442 | 1848 | kallsyms_filename = "/proc/kallsyms"; |
9e201442 | 1849 | } |
439d473b | 1850 | |
cc612d81 | 1851 | do_kallsyms: |
9de89fe7 | 1852 | err = dso__load_kallsyms(self, kallsyms_filename, map, filter); |
3846df2e ACM |
1853 | if (err > 0) |
1854 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
dc8d6ab2 | 1855 | free(kallsyms_allocated_filename); |
439d473b ACM |
1856 | |
1857 | if (err > 0) { | |
cc612d81 | 1858 | out_fixup: |
e1c7c6a4 | 1859 | if (kallsyms_filename != NULL) |
dc8d6ab2 | 1860 | dso__set_long_name(self, strdup("[kernel.kallsyms]")); |
6a4694a4 ACM |
1861 | map__fixup_start(map); |
1862 | map__fixup_end(map); | |
439d473b | 1863 | } |
94cb9e38 | 1864 | |
a827c875 ACM |
1865 | return err; |
1866 | } | |
1867 | ||
a1645ce1 ZY |
1868 | static int dso__load_guest_kernel_sym(struct dso *self, struct map *map, |
1869 | symbol_filter_t filter) | |
1870 | { | |
1871 | int err; | |
1872 | const char *kallsyms_filename = NULL; | |
23346f21 | 1873 | struct machine *machine; |
a1645ce1 ZY |
1874 | char path[PATH_MAX]; |
1875 | ||
1876 | if (!map->groups) { | |
1877 | pr_debug("Guest kernel map hasn't the point to groups\n"); | |
1878 | return -1; | |
1879 | } | |
23346f21 | 1880 | machine = map->groups->machine; |
a1645ce1 | 1881 | |
23346f21 | 1882 | if (machine__is_default_guest(machine)) { |
a1645ce1 ZY |
1883 | /* |
1884 | * if the user specified a vmlinux filename, use it and only | |
1885 | * it, reporting errors to the user if it cannot be used. | |
1886 | * Or use file guest_kallsyms inputted by user on commandline | |
1887 | */ | |
1888 | if (symbol_conf.default_guest_vmlinux_name != NULL) { | |
1889 | err = dso__load_vmlinux(self, map, | |
1890 | symbol_conf.default_guest_vmlinux_name, filter); | |
1891 | goto out_try_fixup; | |
1892 | } | |
1893 | ||
1894 | kallsyms_filename = symbol_conf.default_guest_kallsyms; | |
1895 | if (!kallsyms_filename) | |
1896 | return -1; | |
1897 | } else { | |
23346f21 | 1898 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); |
a1645ce1 ZY |
1899 | kallsyms_filename = path; |
1900 | } | |
1901 | ||
1902 | err = dso__load_kallsyms(self, kallsyms_filename, map, filter); | |
1903 | if (err > 0) | |
1904 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
1905 | ||
1906 | out_try_fixup: | |
1907 | if (err > 0) { | |
1908 | if (kallsyms_filename != NULL) { | |
48ea8f54 | 1909 | machine__mmap_name(machine, path, sizeof(path)); |
23346f21 | 1910 | dso__set_long_name(self, strdup(path)); |
a1645ce1 ZY |
1911 | } |
1912 | map__fixup_start(map); | |
1913 | map__fixup_end(map); | |
1914 | } | |
1915 | ||
1916 | return err; | |
1917 | } | |
cd84c2ac | 1918 | |
b0da954a | 1919 | static void dsos__add(struct list_head *head, struct dso *dso) |
cd84c2ac | 1920 | { |
b0da954a | 1921 | list_add_tail(&dso->node, head); |
cd84c2ac FW |
1922 | } |
1923 | ||
b0da954a | 1924 | static struct dso *dsos__find(struct list_head *head, const char *name) |
cd84c2ac FW |
1925 | { |
1926 | struct dso *pos; | |
1927 | ||
b0da954a | 1928 | list_for_each_entry(pos, head, node) |
cf4e5b08 | 1929 | if (strcmp(pos->long_name, name) == 0) |
cd84c2ac FW |
1930 | return pos; |
1931 | return NULL; | |
1932 | } | |
1933 | ||
a89e5abe | 1934 | struct dso *__dsos__findnew(struct list_head *head, const char *name) |
cd84c2ac | 1935 | { |
a89e5abe | 1936 | struct dso *dso = dsos__find(head, name); |
cd84c2ac | 1937 | |
e4204992 | 1938 | if (!dso) { |
00a192b3 | 1939 | dso = dso__new(name); |
cfc10d3b | 1940 | if (dso != NULL) { |
a89e5abe | 1941 | dsos__add(head, dso); |
cfc10d3b ACM |
1942 | dso__set_basename(dso); |
1943 | } | |
66bd8424 | 1944 | } |
cd84c2ac FW |
1945 | |
1946 | return dso; | |
cd84c2ac FW |
1947 | } |
1948 | ||
1f626bc3 | 1949 | size_t __dsos__fprintf(struct list_head *head, FILE *fp) |
cd84c2ac FW |
1950 | { |
1951 | struct dso *pos; | |
cbf69680 | 1952 | size_t ret = 0; |
cd84c2ac | 1953 | |
95011c60 ACM |
1954 | list_for_each_entry(pos, head, node) { |
1955 | int i; | |
1956 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
cbf69680 | 1957 | ret += dso__fprintf(pos, i, fp); |
95011c60 | 1958 | } |
cbf69680 ACM |
1959 | |
1960 | return ret; | |
cd84c2ac FW |
1961 | } |
1962 | ||
cbf69680 | 1963 | size_t machines__fprintf_dsos(struct rb_root *self, FILE *fp) |
b0da954a | 1964 | { |
a1645ce1 | 1965 | struct rb_node *nd; |
cbf69680 | 1966 | size_t ret = 0; |
a1645ce1 | 1967 | |
cbf69680 | 1968 | for (nd = rb_first(self); nd; nd = rb_next(nd)) { |
23346f21 | 1969 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
cbf69680 ACM |
1970 | ret += __dsos__fprintf(&pos->kernel_dsos, fp); |
1971 | ret += __dsos__fprintf(&pos->user_dsos, fp); | |
a1645ce1 | 1972 | } |
cbf69680 ACM |
1973 | |
1974 | return ret; | |
b0da954a ACM |
1975 | } |
1976 | ||
88d3d9b7 ACM |
1977 | static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp, |
1978 | bool with_hits) | |
9e03eb2d ACM |
1979 | { |
1980 | struct dso *pos; | |
1981 | size_t ret = 0; | |
1982 | ||
b0da954a | 1983 | list_for_each_entry(pos, head, node) { |
88d3d9b7 ACM |
1984 | if (with_hits && !pos->hit) |
1985 | continue; | |
9e03eb2d | 1986 | ret += dso__fprintf_buildid(pos, fp); |
1124ba73 | 1987 | ret += fprintf(fp, " %s\n", pos->long_name); |
9e03eb2d ACM |
1988 | } |
1989 | return ret; | |
1990 | } | |
1991 | ||
f869097e ACM |
1992 | size_t machine__fprintf_dsos_buildid(struct machine *self, FILE *fp, bool with_hits) |
1993 | { | |
1994 | return __dsos__fprintf_buildid(&self->kernel_dsos, fp, with_hits) + | |
1995 | __dsos__fprintf_buildid(&self->user_dsos, fp, with_hits); | |
1996 | } | |
1997 | ||
cbf69680 | 1998 | size_t machines__fprintf_dsos_buildid(struct rb_root *self, FILE *fp, bool with_hits) |
b0da954a | 1999 | { |
a1645ce1 ZY |
2000 | struct rb_node *nd; |
2001 | size_t ret = 0; | |
2002 | ||
cbf69680 | 2003 | for (nd = rb_first(self); nd; nd = rb_next(nd)) { |
23346f21 | 2004 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
f869097e | 2005 | ret += machine__fprintf_dsos_buildid(pos, fp, with_hits); |
a1645ce1 ZY |
2006 | } |
2007 | return ret; | |
b0da954a ACM |
2008 | } |
2009 | ||
fd1d908c ACM |
2010 | struct dso *dso__new_kernel(const char *name) |
2011 | { | |
2012 | struct dso *self = dso__new(name ?: "[kernel.kallsyms]"); | |
2013 | ||
2014 | if (self != NULL) { | |
b63be8d7 | 2015 | dso__set_short_name(self, "[kernel]"); |
a1645ce1 ZY |
2016 | self->kernel = DSO_TYPE_KERNEL; |
2017 | } | |
2018 | ||
2019 | return self; | |
2020 | } | |
2021 | ||
23346f21 | 2022 | static struct dso *dso__new_guest_kernel(struct machine *machine, |
a1645ce1 ZY |
2023 | const char *name) |
2024 | { | |
48ea8f54 ACM |
2025 | char bf[PATH_MAX]; |
2026 | struct dso *self = dso__new(name ?: machine__mmap_name(machine, bf, sizeof(bf))); | |
a1645ce1 | 2027 | |
a1645ce1 ZY |
2028 | if (self != NULL) { |
2029 | dso__set_short_name(self, "[guest.kernel]"); | |
2030 | self->kernel = DSO_TYPE_GUEST_KERNEL; | |
fd1d908c ACM |
2031 | } |
2032 | ||
2033 | return self; | |
2034 | } | |
2035 | ||
23346f21 | 2036 | void dso__read_running_kernel_build_id(struct dso *self, struct machine *machine) |
fd1d908c | 2037 | { |
a1645ce1 ZY |
2038 | char path[PATH_MAX]; |
2039 | ||
23346f21 | 2040 | if (machine__is_default_guest(machine)) |
a1645ce1 | 2041 | return; |
23346f21 | 2042 | sprintf(path, "%s/sys/kernel/notes", machine->root_dir); |
a1645ce1 | 2043 | if (sysfs__read_build_id(path, self->build_id, |
fd1d908c ACM |
2044 | sizeof(self->build_id)) == 0) |
2045 | self->has_build_id = true; | |
2046 | } | |
2047 | ||
5c0541d5 | 2048 | static struct dso *machine__create_kernel(struct machine *self) |
cd84c2ac | 2049 | { |
a1645ce1 ZY |
2050 | const char *vmlinux_name = NULL; |
2051 | struct dso *kernel; | |
cd84c2ac | 2052 | |
5c0541d5 | 2053 | if (machine__is_host(self)) { |
a1645ce1 ZY |
2054 | vmlinux_name = symbol_conf.vmlinux_name; |
2055 | kernel = dso__new_kernel(vmlinux_name); | |
2056 | } else { | |
5c0541d5 | 2057 | if (machine__is_default_guest(self)) |
a1645ce1 | 2058 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; |
5c0541d5 | 2059 | kernel = dso__new_guest_kernel(self, vmlinux_name); |
8d92c02a | 2060 | } |
cd84c2ac | 2061 | |
a1645ce1 | 2062 | if (kernel != NULL) { |
5c0541d5 ACM |
2063 | dso__read_running_kernel_build_id(kernel, self); |
2064 | dsos__add(&self->kernel_dsos, kernel); | |
a1645ce1 | 2065 | } |
f1dfa0b1 | 2066 | return kernel; |
f1dfa0b1 ACM |
2067 | } |
2068 | ||
d28c6223 | 2069 | int __machine__create_kernel_maps(struct machine *self, struct dso *kernel) |
f1dfa0b1 | 2070 | { |
de176489 | 2071 | enum map_type type; |
f1dfa0b1 | 2072 | |
de176489 | 2073 | for (type = 0; type < MAP__NR_TYPES; ++type) { |
9de89fe7 ACM |
2074 | struct kmap *kmap; |
2075 | ||
d28c6223 ACM |
2076 | self->vmlinux_maps[type] = map__new2(0, kernel, type); |
2077 | if (self->vmlinux_maps[type] == NULL) | |
de176489 | 2078 | return -1; |
f1dfa0b1 | 2079 | |
d28c6223 ACM |
2080 | self->vmlinux_maps[type]->map_ip = |
2081 | self->vmlinux_maps[type]->unmap_ip = identity__map_ip; | |
9de89fe7 | 2082 | |
d28c6223 ACM |
2083 | kmap = map__kmap(self->vmlinux_maps[type]); |
2084 | kmap->kmaps = &self->kmaps; | |
2085 | map_groups__insert(&self->kmaps, self->vmlinux_maps[type]); | |
f1dfa0b1 ACM |
2086 | } |
2087 | ||
f1dfa0b1 | 2088 | return 0; |
2446042c ACM |
2089 | } |
2090 | ||
5c0541d5 ACM |
2091 | int machine__create_kernel_maps(struct machine *self) |
2092 | { | |
2093 | struct dso *kernel = machine__create_kernel(self); | |
2094 | ||
2095 | if (kernel == NULL || | |
2096 | __machine__create_kernel_maps(self, kernel) < 0) | |
2097 | return -1; | |
2098 | ||
2099 | if (symbol_conf.use_modules && machine__create_modules(self) < 0) | |
2100 | pr_debug("Problems creating module maps, continuing anyway...\n"); | |
2101 | /* | |
2102 | * Now that we have all the maps created, just set the ->end of them: | |
2103 | */ | |
2104 | map_groups__fixup_end(&self->kmaps); | |
2105 | return 0; | |
2106 | } | |
2107 | ||
cc612d81 ACM |
2108 | static void vmlinux_path__exit(void) |
2109 | { | |
2110 | while (--vmlinux_path__nr_entries >= 0) { | |
2111 | free(vmlinux_path[vmlinux_path__nr_entries]); | |
2112 | vmlinux_path[vmlinux_path__nr_entries] = NULL; | |
2113 | } | |
2114 | ||
2115 | free(vmlinux_path); | |
2116 | vmlinux_path = NULL; | |
2117 | } | |
2118 | ||
2119 | static int vmlinux_path__init(void) | |
2120 | { | |
2121 | struct utsname uts; | |
2122 | char bf[PATH_MAX]; | |
2123 | ||
2124 | if (uname(&uts) < 0) | |
2125 | return -1; | |
2126 | ||
2127 | vmlinux_path = malloc(sizeof(char *) * 5); | |
2128 | if (vmlinux_path == NULL) | |
2129 | return -1; | |
2130 | ||
2131 | vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux"); | |
2132 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2133 | goto out_fail; | |
2134 | ++vmlinux_path__nr_entries; | |
2135 | vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux"); | |
2136 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2137 | goto out_fail; | |
2138 | ++vmlinux_path__nr_entries; | |
2139 | snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", uts.release); | |
2140 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2141 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2142 | goto out_fail; | |
2143 | ++vmlinux_path__nr_entries; | |
2144 | snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", uts.release); | |
2145 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2146 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2147 | goto out_fail; | |
2148 | ++vmlinux_path__nr_entries; | |
2149 | snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux", | |
2150 | uts.release); | |
2151 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2152 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2153 | goto out_fail; | |
2154 | ++vmlinux_path__nr_entries; | |
2155 | ||
2156 | return 0; | |
2157 | ||
2158 | out_fail: | |
2159 | vmlinux_path__exit(); | |
2160 | return -1; | |
2161 | } | |
2162 | ||
5ad90e4e | 2163 | size_t machine__fprintf_vmlinux_path(struct machine *self, FILE *fp) |
b0a9ab62 ACM |
2164 | { |
2165 | int i; | |
2166 | size_t printed = 0; | |
5ad90e4e ACM |
2167 | struct dso *kdso = self->vmlinux_maps[MAP__FUNCTION]->dso; |
2168 | ||
2169 | if (kdso->has_build_id) { | |
2170 | char filename[PATH_MAX]; | |
2171 | if (dso__build_id_filename(kdso, filename, sizeof(filename))) | |
2172 | printed += fprintf(fp, "[0] %s\n", filename); | |
2173 | } | |
b0a9ab62 ACM |
2174 | |
2175 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
5ad90e4e ACM |
2176 | printed += fprintf(fp, "[%d] %s\n", |
2177 | i + kdso->has_build_id, vmlinux_path[i]); | |
b0a9ab62 ACM |
2178 | |
2179 | return printed; | |
2180 | } | |
2181 | ||
655000e7 ACM |
2182 | static int setup_list(struct strlist **list, const char *list_str, |
2183 | const char *list_name) | |
2184 | { | |
2185 | if (list_str == NULL) | |
2186 | return 0; | |
2187 | ||
2188 | *list = strlist__new(true, list_str); | |
2189 | if (!*list) { | |
2190 | pr_err("problems parsing %s list\n", list_name); | |
2191 | return -1; | |
2192 | } | |
2193 | return 0; | |
2194 | } | |
2195 | ||
75be6cf4 | 2196 | int symbol__init(void) |
2446042c | 2197 | { |
95011c60 | 2198 | elf_version(EV_CURRENT); |
75be6cf4 ACM |
2199 | if (symbol_conf.sort_by_name) |
2200 | symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - | |
2201 | sizeof(struct symbol)); | |
b32d133a | 2202 | |
75be6cf4 | 2203 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init() < 0) |
2446042c ACM |
2204 | return -1; |
2205 | ||
c410a338 ACM |
2206 | if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { |
2207 | pr_err("'.' is the only non valid --field-separator argument\n"); | |
2208 | return -1; | |
2209 | } | |
2210 | ||
655000e7 ACM |
2211 | if (setup_list(&symbol_conf.dso_list, |
2212 | symbol_conf.dso_list_str, "dso") < 0) | |
2213 | return -1; | |
2214 | ||
2215 | if (setup_list(&symbol_conf.comm_list, | |
2216 | symbol_conf.comm_list_str, "comm") < 0) | |
2217 | goto out_free_dso_list; | |
2218 | ||
2219 | if (setup_list(&symbol_conf.sym_list, | |
2220 | symbol_conf.sym_list_str, "symbol") < 0) | |
2221 | goto out_free_comm_list; | |
2222 | ||
4aa65636 | 2223 | return 0; |
655000e7 ACM |
2224 | |
2225 | out_free_dso_list: | |
2226 | strlist__delete(symbol_conf.dso_list); | |
2227 | out_free_comm_list: | |
2228 | strlist__delete(symbol_conf.comm_list); | |
2229 | return -1; | |
4aa65636 ACM |
2230 | } |
2231 | ||
d28c6223 | 2232 | int machines__create_kernel_maps(struct rb_root *self, pid_t pid) |
4aa65636 | 2233 | { |
d28c6223 | 2234 | struct machine *machine = machines__findnew(self, pid); |
9de89fe7 | 2235 | |
23346f21 | 2236 | if (machine == NULL) |
a1645ce1 | 2237 | return -1; |
cc612d81 | 2238 | |
5c0541d5 | 2239 | return machine__create_kernel_maps(machine); |
cd84c2ac | 2240 | } |
5aab621b ACM |
2241 | |
2242 | static int hex(char ch) | |
2243 | { | |
2244 | if ((ch >= '0') && (ch <= '9')) | |
2245 | return ch - '0'; | |
2246 | if ((ch >= 'a') && (ch <= 'f')) | |
2247 | return ch - 'a' + 10; | |
2248 | if ((ch >= 'A') && (ch <= 'F')) | |
2249 | return ch - 'A' + 10; | |
2250 | return -1; | |
2251 | } | |
2252 | ||
2253 | /* | |
2254 | * While we find nice hex chars, build a long_val. | |
2255 | * Return number of chars processed. | |
2256 | */ | |
2257 | int hex2u64(const char *ptr, u64 *long_val) | |
2258 | { | |
2259 | const char *p = ptr; | |
2260 | *long_val = 0; | |
2261 | ||
2262 | while (*p) { | |
2263 | const int hex_val = hex(*p); | |
2264 | ||
2265 | if (hex_val < 0) | |
2266 | break; | |
2267 | ||
2268 | *long_val = (*long_val << 4) | hex_val; | |
2269 | p++; | |
2270 | } | |
2271 | ||
2272 | return p - ptr; | |
2273 | } | |
2274 | ||
2275 | char *strxfrchar(char *s, char from, char to) | |
2276 | { | |
2277 | char *p = s; | |
2278 | ||
2279 | while ((p = strchr(p, from)) != NULL) | |
2280 | *p++ = to; | |
2281 | ||
2282 | return s; | |
2283 | } | |
a1645ce1 | 2284 | |
d28c6223 | 2285 | int machines__create_guest_kernel_maps(struct rb_root *self) |
a1645ce1 ZY |
2286 | { |
2287 | int ret = 0; | |
2288 | struct dirent **namelist = NULL; | |
2289 | int i, items = 0; | |
2290 | char path[PATH_MAX]; | |
2291 | pid_t pid; | |
2292 | ||
2293 | if (symbol_conf.default_guest_vmlinux_name || | |
2294 | symbol_conf.default_guest_modules || | |
2295 | symbol_conf.default_guest_kallsyms) { | |
d28c6223 | 2296 | machines__create_kernel_maps(self, DEFAULT_GUEST_KERNEL_ID); |
a1645ce1 ZY |
2297 | } |
2298 | ||
2299 | if (symbol_conf.guestmount) { | |
2300 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
2301 | if (items <= 0) | |
2302 | return -ENOENT; | |
2303 | for (i = 0; i < items; i++) { | |
2304 | if (!isdigit(namelist[i]->d_name[0])) { | |
2305 | /* Filter out . and .. */ | |
2306 | continue; | |
2307 | } | |
2308 | pid = atoi(namelist[i]->d_name); | |
2309 | sprintf(path, "%s/%s/proc/kallsyms", | |
2310 | symbol_conf.guestmount, | |
2311 | namelist[i]->d_name); | |
2312 | ret = access(path, R_OK); | |
2313 | if (ret) { | |
2314 | pr_debug("Can't access file %s\n", path); | |
2315 | goto failure; | |
2316 | } | |
d28c6223 | 2317 | machines__create_kernel_maps(self, pid); |
a1645ce1 ZY |
2318 | } |
2319 | failure: | |
2320 | free(namelist); | |
2321 | } | |
2322 | ||
2323 | return ret; | |
2324 | } | |
5c0541d5 ACM |
2325 | |
2326 | int machine__load_kallsyms(struct machine *self, const char *filename, | |
2327 | enum map_type type, symbol_filter_t filter) | |
2328 | { | |
2329 | struct map *map = self->vmlinux_maps[type]; | |
2330 | int ret = dso__load_kallsyms(map->dso, filename, map, filter); | |
2331 | ||
2332 | if (ret > 0) { | |
2333 | dso__set_loaded(map->dso, type); | |
2334 | /* | |
2335 | * Since /proc/kallsyms will have multiple sessions for the | |
2336 | * kernel, with modules between them, fixup the end of all | |
2337 | * sections. | |
2338 | */ | |
2339 | __map_groups__fixup_end(&self->kmaps, type); | |
2340 | } | |
2341 | ||
2342 | return ret; | |
2343 | } | |
2344 | ||
2345 | int machine__load_vmlinux_path(struct machine *self, enum map_type type, | |
2346 | symbol_filter_t filter) | |
2347 | { | |
2348 | struct map *map = self->vmlinux_maps[type]; | |
2349 | int ret = dso__load_vmlinux_path(map->dso, map, filter); | |
2350 | ||
2351 | if (ret > 0) { | |
2352 | dso__set_loaded(map->dso, type); | |
2353 | map__reloc_vmlinux(map); | |
2354 | } | |
2355 | ||
2356 | return ret; | |
2357 | } |