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