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