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Commit | Line | Data |
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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 | |
0b73da3f | 133 | self->start = start; |
6cfcc53e | 134 | self->end = len ? start + len - 1 : start; |
e4204992 | 135 | |
29a9f66d | 136 | pr_debug4("%s: %s %#Lx-%#Lx\n", __func__, name, start, self->end); |
e4204992 | 137 | |
0b73da3f | 138 | memcpy(self->name, name, namelen); |
a2928c42 ACM |
139 | |
140 | return self; | |
141 | } | |
142 | ||
628ada0c | 143 | void symbol__delete(struct symbol *self) |
a2928c42 | 144 | { |
75be6cf4 | 145 | free(((void *)self) - symbol_conf.priv_size); |
a2928c42 ACM |
146 | } |
147 | ||
148 | static size_t symbol__fprintf(struct symbol *self, FILE *fp) | |
149 | { | |
439d473b | 150 | return fprintf(fp, " %llx-%llx %s\n", |
a2928c42 ACM |
151 | self->start, self->end, self->name); |
152 | } | |
153 | ||
b7cece76 | 154 | void dso__set_long_name(struct dso *self, char *name) |
cfc10d3b | 155 | { |
ef6ae724 ACM |
156 | if (name == NULL) |
157 | return; | |
cfc10d3b ACM |
158 | self->long_name = name; |
159 | self->long_name_len = strlen(name); | |
160 | } | |
161 | ||
b63be8d7 ACM |
162 | static void dso__set_short_name(struct dso *self, const char *name) |
163 | { | |
164 | if (name == NULL) | |
165 | return; | |
166 | self->short_name = name; | |
167 | self->short_name_len = strlen(name); | |
168 | } | |
169 | ||
cfc10d3b ACM |
170 | static void dso__set_basename(struct dso *self) |
171 | { | |
b63be8d7 | 172 | dso__set_short_name(self, basename(self->long_name)); |
cfc10d3b ACM |
173 | } |
174 | ||
00a192b3 | 175 | struct dso *dso__new(const char *name) |
a2928c42 | 176 | { |
5aab621b | 177 | struct dso *self = calloc(1, sizeof(*self) + strlen(name) + 1); |
a2928c42 ACM |
178 | |
179 | if (self != NULL) { | |
6a4694a4 | 180 | int i; |
a2928c42 | 181 | strcpy(self->name, name); |
cfc10d3b | 182 | dso__set_long_name(self, self->name); |
b63be8d7 | 183 | dso__set_short_name(self, self->name); |
6a4694a4 | 184 | for (i = 0; i < MAP__NR_TYPES; ++i) |
79406cd7 | 185 | self->symbols[i] = self->symbol_names[i] = RB_ROOT; |
52d422de | 186 | self->slen_calculated = 0; |
94cb9e38 | 187 | self->origin = DSO__ORIG_NOT_FOUND; |
8d06367f | 188 | self->loaded = 0; |
79406cd7 | 189 | self->sorted_by_name = 0; |
8d06367f | 190 | self->has_build_id = 0; |
a1645ce1 | 191 | self->kernel = DSO_TYPE_USER; |
0ab061cd | 192 | INIT_LIST_HEAD(&self->node); |
a2928c42 ACM |
193 | } |
194 | ||
195 | return self; | |
196 | } | |
197 | ||
fcf1203a | 198 | static void symbols__delete(struct rb_root *self) |
a2928c42 ACM |
199 | { |
200 | struct symbol *pos; | |
fcf1203a | 201 | struct rb_node *next = rb_first(self); |
a2928c42 ACM |
202 | |
203 | while (next) { | |
204 | pos = rb_entry(next, struct symbol, rb_node); | |
205 | next = rb_next(&pos->rb_node); | |
fcf1203a | 206 | rb_erase(&pos->rb_node, self); |
00a192b3 | 207 | symbol__delete(pos); |
a2928c42 ACM |
208 | } |
209 | } | |
210 | ||
211 | void dso__delete(struct dso *self) | |
212 | { | |
6a4694a4 ACM |
213 | int i; |
214 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
215 | symbols__delete(&self->symbols[i]); | |
439d473b ACM |
216 | if (self->long_name != self->name) |
217 | free(self->long_name); | |
a2928c42 ACM |
218 | free(self); |
219 | } | |
220 | ||
8d06367f ACM |
221 | void dso__set_build_id(struct dso *self, void *build_id) |
222 | { | |
223 | memcpy(self->build_id, build_id, sizeof(self->build_id)); | |
224 | self->has_build_id = 1; | |
225 | } | |
226 | ||
fcf1203a | 227 | static void symbols__insert(struct rb_root *self, struct symbol *sym) |
a2928c42 | 228 | { |
fcf1203a | 229 | struct rb_node **p = &self->rb_node; |
a2928c42 | 230 | struct rb_node *parent = NULL; |
9cffa8d5 | 231 | const u64 ip = sym->start; |
a2928c42 ACM |
232 | struct symbol *s; |
233 | ||
234 | while (*p != NULL) { | |
235 | parent = *p; | |
236 | s = rb_entry(parent, struct symbol, rb_node); | |
237 | if (ip < s->start) | |
238 | p = &(*p)->rb_left; | |
239 | else | |
240 | p = &(*p)->rb_right; | |
241 | } | |
242 | rb_link_node(&sym->rb_node, parent, p); | |
fcf1203a | 243 | rb_insert_color(&sym->rb_node, self); |
a2928c42 ACM |
244 | } |
245 | ||
fcf1203a | 246 | static struct symbol *symbols__find(struct rb_root *self, u64 ip) |
a2928c42 ACM |
247 | { |
248 | struct rb_node *n; | |
249 | ||
250 | if (self == NULL) | |
251 | return NULL; | |
252 | ||
fcf1203a | 253 | n = self->rb_node; |
a2928c42 ACM |
254 | |
255 | while (n) { | |
256 | struct symbol *s = rb_entry(n, struct symbol, rb_node); | |
257 | ||
258 | if (ip < s->start) | |
259 | n = n->rb_left; | |
260 | else if (ip > s->end) | |
261 | n = n->rb_right; | |
262 | else | |
263 | return s; | |
264 | } | |
265 | ||
266 | return NULL; | |
267 | } | |
268 | ||
79406cd7 ACM |
269 | struct symbol_name_rb_node { |
270 | struct rb_node rb_node; | |
271 | struct symbol sym; | |
272 | }; | |
273 | ||
274 | static void symbols__insert_by_name(struct rb_root *self, struct symbol *sym) | |
275 | { | |
276 | struct rb_node **p = &self->rb_node; | |
277 | struct rb_node *parent = NULL; | |
278 | struct symbol_name_rb_node *symn = ((void *)sym) - sizeof(*parent), *s; | |
279 | ||
280 | while (*p != NULL) { | |
281 | parent = *p; | |
282 | s = rb_entry(parent, struct symbol_name_rb_node, rb_node); | |
283 | if (strcmp(sym->name, s->sym.name) < 0) | |
284 | p = &(*p)->rb_left; | |
285 | else | |
286 | p = &(*p)->rb_right; | |
287 | } | |
288 | rb_link_node(&symn->rb_node, parent, p); | |
289 | rb_insert_color(&symn->rb_node, self); | |
290 | } | |
291 | ||
292 | static void symbols__sort_by_name(struct rb_root *self, struct rb_root *source) | |
293 | { | |
294 | struct rb_node *nd; | |
295 | ||
296 | for (nd = rb_first(source); nd; nd = rb_next(nd)) { | |
297 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
298 | symbols__insert_by_name(self, pos); | |
299 | } | |
300 | } | |
301 | ||
302 | static struct symbol *symbols__find_by_name(struct rb_root *self, const char *name) | |
303 | { | |
304 | struct rb_node *n; | |
305 | ||
306 | if (self == NULL) | |
307 | return NULL; | |
308 | ||
309 | n = self->rb_node; | |
310 | ||
311 | while (n) { | |
312 | struct symbol_name_rb_node *s; | |
313 | int cmp; | |
314 | ||
315 | s = rb_entry(n, struct symbol_name_rb_node, rb_node); | |
316 | cmp = strcmp(name, s->sym.name); | |
317 | ||
318 | if (cmp < 0) | |
319 | n = n->rb_left; | |
320 | else if (cmp > 0) | |
321 | n = n->rb_right; | |
322 | else | |
323 | return &s->sym; | |
324 | } | |
325 | ||
326 | return NULL; | |
327 | } | |
328 | ||
329 | struct symbol *dso__find_symbol(struct dso *self, | |
330 | enum map_type type, u64 addr) | |
fcf1203a | 331 | { |
6a4694a4 | 332 | return symbols__find(&self->symbols[type], addr); |
fcf1203a ACM |
333 | } |
334 | ||
79406cd7 ACM |
335 | struct symbol *dso__find_symbol_by_name(struct dso *self, enum map_type type, |
336 | const char *name) | |
337 | { | |
338 | return symbols__find_by_name(&self->symbol_names[type], name); | |
339 | } | |
340 | ||
341 | void dso__sort_by_name(struct dso *self, enum map_type type) | |
342 | { | |
343 | dso__set_sorted_by_name(self, type); | |
344 | return symbols__sort_by_name(&self->symbol_names[type], | |
345 | &self->symbols[type]); | |
346 | } | |
347 | ||
ef12a141 | 348 | int build_id__sprintf(const u8 *self, int len, char *bf) |
a2928c42 | 349 | { |
8d06367f | 350 | char *bid = bf; |
ef12a141 | 351 | const u8 *raw = self; |
8d06367f | 352 | int i; |
a2928c42 | 353 | |
8d06367f ACM |
354 | for (i = 0; i < len; ++i) { |
355 | sprintf(bid, "%02x", *raw); | |
356 | ++raw; | |
357 | bid += 2; | |
358 | } | |
359 | ||
360 | return raw - self; | |
361 | } | |
362 | ||
9e03eb2d | 363 | size_t dso__fprintf_buildid(struct dso *self, FILE *fp) |
8d06367f ACM |
364 | { |
365 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
8d06367f ACM |
366 | |
367 | build_id__sprintf(self->build_id, sizeof(self->build_id), sbuild_id); | |
9e03eb2d ACM |
368 | return fprintf(fp, "%s", sbuild_id); |
369 | } | |
370 | ||
95011c60 | 371 | size_t dso__fprintf(struct dso *self, enum map_type type, FILE *fp) |
9e03eb2d ACM |
372 | { |
373 | struct rb_node *nd; | |
374 | size_t ret = fprintf(fp, "dso: %s (", self->short_name); | |
375 | ||
3846df2e ACM |
376 | if (self->short_name != self->long_name) |
377 | ret += fprintf(fp, "%s, ", self->long_name); | |
378 | ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type], | |
379 | self->loaded ? "" : "NOT "); | |
9e03eb2d | 380 | ret += dso__fprintf_buildid(self, fp); |
6a4694a4 | 381 | ret += fprintf(fp, ")\n"); |
95011c60 ACM |
382 | for (nd = rb_first(&self->symbols[type]); nd; nd = rb_next(nd)) { |
383 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
384 | ret += symbol__fprintf(pos, fp); | |
a2928c42 ACM |
385 | } |
386 | ||
387 | return ret; | |
388 | } | |
389 | ||
9e201442 ACM |
390 | int kallsyms__parse(const char *filename, void *arg, |
391 | int (*process_symbol)(void *arg, const char *name, | |
682b335a | 392 | char type, u64 start)) |
a2928c42 | 393 | { |
a2928c42 ACM |
394 | char *line = NULL; |
395 | size_t n; | |
682b335a | 396 | int err = 0; |
9e201442 | 397 | FILE *file = fopen(filename, "r"); |
a2928c42 ACM |
398 | |
399 | if (file == NULL) | |
400 | goto out_failure; | |
401 | ||
402 | while (!feof(file)) { | |
9cffa8d5 | 403 | u64 start; |
a2928c42 ACM |
404 | int line_len, len; |
405 | char symbol_type; | |
2e538c4a | 406 | char *symbol_name; |
a2928c42 ACM |
407 | |
408 | line_len = getline(&line, &n, file); | |
a1645ce1 | 409 | if (line_len < 0 || !line) |
a2928c42 ACM |
410 | break; |
411 | ||
a2928c42 ACM |
412 | line[--line_len] = '\0'; /* \n */ |
413 | ||
a0055ae2 | 414 | len = hex2u64(line, &start); |
a2928c42 ACM |
415 | |
416 | len++; | |
417 | if (len + 2 >= line_len) | |
418 | continue; | |
419 | ||
420 | symbol_type = toupper(line[len]); | |
af427bf5 | 421 | symbol_name = line + len + 2; |
682b335a ACM |
422 | |
423 | err = process_symbol(arg, symbol_name, symbol_type, start); | |
424 | if (err) | |
425 | break; | |
2e538c4a ACM |
426 | } |
427 | ||
428 | free(line); | |
429 | fclose(file); | |
682b335a | 430 | return err; |
2e538c4a | 431 | |
2e538c4a ACM |
432 | out_failure: |
433 | return -1; | |
434 | } | |
435 | ||
682b335a ACM |
436 | struct process_kallsyms_args { |
437 | struct map *map; | |
438 | struct dso *dso; | |
439 | }; | |
440 | ||
441 | static int map__process_kallsym_symbol(void *arg, const char *name, | |
442 | char type, u64 start) | |
443 | { | |
444 | struct symbol *sym; | |
445 | struct process_kallsyms_args *a = arg; | |
446 | struct rb_root *root = &a->dso->symbols[a->map->type]; | |
447 | ||
448 | if (!symbol_type__is_a(type, a->map->type)) | |
449 | return 0; | |
450 | ||
451 | /* | |
452 | * Will fix up the end later, when we have all symbols sorted. | |
453 | */ | |
454 | sym = symbol__new(start, 0, name); | |
455 | ||
456 | if (sym == NULL) | |
457 | return -ENOMEM; | |
458 | /* | |
459 | * We will pass the symbols to the filter later, in | |
460 | * map__split_kallsyms, when we have split the maps per module | |
461 | */ | |
462 | symbols__insert(root, sym); | |
a1645ce1 | 463 | |
682b335a ACM |
464 | return 0; |
465 | } | |
466 | ||
467 | /* | |
468 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
469 | * so that we can in the next step set the symbol ->end address and then | |
470 | * call kernel_maps__split_kallsyms. | |
471 | */ | |
9e201442 ACM |
472 | static int dso__load_all_kallsyms(struct dso *self, const char *filename, |
473 | struct map *map) | |
682b335a ACM |
474 | { |
475 | struct process_kallsyms_args args = { .map = map, .dso = self, }; | |
9e201442 | 476 | return kallsyms__parse(filename, &args, map__process_kallsym_symbol); |
682b335a ACM |
477 | } |
478 | ||
2e538c4a ACM |
479 | /* |
480 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
481 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
482 | * the original ELF section names vmlinux have. | |
483 | */ | |
9958e1f0 | 484 | static int dso__split_kallsyms(struct dso *self, struct map *map, |
9de89fe7 | 485 | symbol_filter_t filter) |
2e538c4a | 486 | { |
9de89fe7 | 487 | struct map_groups *kmaps = map__kmap(map)->kmaps; |
23346f21 | 488 | struct machine *machine = kmaps->machine; |
4e06255f | 489 | struct map *curr_map = map; |
2e538c4a ACM |
490 | struct symbol *pos; |
491 | int count = 0; | |
4e06255f ACM |
492 | struct rb_root *root = &self->symbols[map->type]; |
493 | struct rb_node *next = rb_first(root); | |
2e538c4a ACM |
494 | int kernel_range = 0; |
495 | ||
496 | while (next) { | |
497 | char *module; | |
498 | ||
499 | pos = rb_entry(next, struct symbol, rb_node); | |
500 | next = rb_next(&pos->rb_node); | |
501 | ||
502 | module = strchr(pos->name, '\t'); | |
503 | if (module) { | |
75be6cf4 | 504 | if (!symbol_conf.use_modules) |
1de8e245 ACM |
505 | goto discard_symbol; |
506 | ||
2e538c4a ACM |
507 | *module++ = '\0'; |
508 | ||
b7cece76 | 509 | if (strcmp(curr_map->dso->short_name, module)) { |
a1645ce1 | 510 | if (curr_map != map && |
23346f21 ACM |
511 | self->kernel == DSO_TYPE_GUEST_KERNEL && |
512 | machine__is_default_guest(machine)) { | |
a1645ce1 ZY |
513 | /* |
514 | * We assume all symbols of a module are | |
515 | * continuous in * kallsyms, so curr_map | |
516 | * points to a module and all its | |
517 | * symbols are in its kmap. Mark it as | |
518 | * loaded. | |
519 | */ | |
520 | dso__set_loaded(curr_map->dso, | |
521 | curr_map->type); | |
522 | } | |
523 | ||
524 | curr_map = map_groups__find_by_name(kmaps, | |
525 | map->type, module); | |
4e06255f | 526 | if (curr_map == NULL) { |
a1645ce1 | 527 | pr_err("%s/proc/{kallsyms,modules} " |
b7cece76 | 528 | "inconsistency while looking " |
a1645ce1 | 529 | "for \"%s\" module!\n", |
23346f21 | 530 | machine->root_dir, module); |
a1645ce1 ZY |
531 | curr_map = map; |
532 | goto discard_symbol; | |
af427bf5 | 533 | } |
b7cece76 | 534 | |
a1645ce1 | 535 | if (curr_map->dso->loaded && |
23346f21 | 536 | !machine__is_default_guest(machine)) |
b7cece76 | 537 | goto discard_symbol; |
af427bf5 | 538 | } |
2e538c4a ACM |
539 | /* |
540 | * So that we look just like we get from .ko files, | |
541 | * i.e. not prelinked, relative to map->start. | |
542 | */ | |
4e06255f ACM |
543 | pos->start = curr_map->map_ip(curr_map, pos->start); |
544 | pos->end = curr_map->map_ip(curr_map, pos->end); | |
545 | } else if (curr_map != map) { | |
2e538c4a ACM |
546 | char dso_name[PATH_MAX]; |
547 | struct dso *dso; | |
548 | ||
a1645ce1 ZY |
549 | if (self->kernel == DSO_TYPE_GUEST_KERNEL) |
550 | snprintf(dso_name, sizeof(dso_name), | |
551 | "[guest.kernel].%d", | |
552 | kernel_range++); | |
553 | else | |
554 | snprintf(dso_name, sizeof(dso_name), | |
555 | "[kernel].%d", | |
556 | kernel_range++); | |
2e538c4a | 557 | |
00a192b3 | 558 | dso = dso__new(dso_name); |
2e538c4a ACM |
559 | if (dso == NULL) |
560 | return -1; | |
561 | ||
a1645ce1 ZY |
562 | dso->kernel = self->kernel; |
563 | ||
4e06255f | 564 | curr_map = map__new2(pos->start, dso, map->type); |
37fe5fcb | 565 | if (curr_map == NULL) { |
2e538c4a ACM |
566 | dso__delete(dso); |
567 | return -1; | |
568 | } | |
a2928c42 | 569 | |
4e06255f | 570 | curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; |
9de89fe7 | 571 | map_groups__insert(kmaps, curr_map); |
2e538c4a ACM |
572 | ++kernel_range; |
573 | } | |
a2928c42 | 574 | |
4e06255f | 575 | if (filter && filter(curr_map, pos)) { |
1de8e245 | 576 | discard_symbol: rb_erase(&pos->rb_node, root); |
00a192b3 | 577 | symbol__delete(pos); |
2e538c4a | 578 | } else { |
4e06255f ACM |
579 | if (curr_map != map) { |
580 | rb_erase(&pos->rb_node, root); | |
581 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
2e538c4a | 582 | } |
9974f496 MG |
583 | count++; |
584 | } | |
a2928c42 ACM |
585 | } |
586 | ||
a1645ce1 ZY |
587 | if (curr_map != map && |
588 | self->kernel == DSO_TYPE_GUEST_KERNEL && | |
23346f21 | 589 | machine__is_default_guest(kmaps->machine)) { |
a1645ce1 ZY |
590 | dso__set_loaded(curr_map->dso, curr_map->type); |
591 | } | |
592 | ||
9974f496 | 593 | return count; |
2e538c4a | 594 | } |
a2928c42 | 595 | |
9de89fe7 ACM |
596 | int dso__load_kallsyms(struct dso *self, const char *filename, |
597 | struct map *map, symbol_filter_t filter) | |
2e538c4a | 598 | { |
9e201442 | 599 | if (dso__load_all_kallsyms(self, filename, map) < 0) |
2e538c4a ACM |
600 | return -1; |
601 | ||
4e06255f | 602 | symbols__fixup_end(&self->symbols[map->type]); |
a1645ce1 ZY |
603 | if (self->kernel == DSO_TYPE_GUEST_KERNEL) |
604 | self->origin = DSO__ORIG_GUEST_KERNEL; | |
605 | else | |
606 | self->origin = DSO__ORIG_KERNEL; | |
2e538c4a | 607 | |
9de89fe7 | 608 | return dso__split_kallsyms(self, map, filter); |
af427bf5 ACM |
609 | } |
610 | ||
439d473b | 611 | static int dso__load_perf_map(struct dso *self, struct map *map, |
6beba7ad | 612 | symbol_filter_t filter) |
80d496be PE |
613 | { |
614 | char *line = NULL; | |
615 | size_t n; | |
616 | FILE *file; | |
617 | int nr_syms = 0; | |
618 | ||
439d473b | 619 | file = fopen(self->long_name, "r"); |
80d496be PE |
620 | if (file == NULL) |
621 | goto out_failure; | |
622 | ||
623 | while (!feof(file)) { | |
9cffa8d5 | 624 | u64 start, size; |
80d496be PE |
625 | struct symbol *sym; |
626 | int line_len, len; | |
627 | ||
628 | line_len = getline(&line, &n, file); | |
629 | if (line_len < 0) | |
630 | break; | |
631 | ||
632 | if (!line) | |
633 | goto out_failure; | |
634 | ||
635 | line[--line_len] = '\0'; /* \n */ | |
636 | ||
637 | len = hex2u64(line, &start); | |
638 | ||
639 | len++; | |
640 | if (len + 2 >= line_len) | |
641 | continue; | |
642 | ||
643 | len += hex2u64(line + len, &size); | |
644 | ||
645 | len++; | |
646 | if (len + 2 >= line_len) | |
647 | continue; | |
648 | ||
00a192b3 | 649 | sym = symbol__new(start, size, line + len); |
80d496be PE |
650 | |
651 | if (sym == NULL) | |
652 | goto out_delete_line; | |
653 | ||
439d473b | 654 | if (filter && filter(map, sym)) |
00a192b3 | 655 | symbol__delete(sym); |
80d496be | 656 | else { |
6a4694a4 | 657 | symbols__insert(&self->symbols[map->type], sym); |
80d496be PE |
658 | nr_syms++; |
659 | } | |
660 | } | |
661 | ||
662 | free(line); | |
663 | fclose(file); | |
664 | ||
665 | return nr_syms; | |
666 | ||
667 | out_delete_line: | |
668 | free(line); | |
669 | out_failure: | |
670 | return -1; | |
671 | } | |
672 | ||
a2928c42 ACM |
673 | /** |
674 | * elf_symtab__for_each_symbol - iterate thru all the symbols | |
675 | * | |
676 | * @self: struct elf_symtab instance to iterate | |
83a0944f | 677 | * @idx: uint32_t idx |
a2928c42 ACM |
678 | * @sym: GElf_Sym iterator |
679 | */ | |
83a0944f IM |
680 | #define elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) \ |
681 | for (idx = 0, gelf_getsym(syms, idx, &sym);\ | |
682 | idx < nr_syms; \ | |
683 | idx++, gelf_getsym(syms, idx, &sym)) | |
a2928c42 ACM |
684 | |
685 | static inline uint8_t elf_sym__type(const GElf_Sym *sym) | |
686 | { | |
687 | return GELF_ST_TYPE(sym->st_info); | |
688 | } | |
689 | ||
690 | static inline int elf_sym__is_function(const GElf_Sym *sym) | |
691 | { | |
692 | return elf_sym__type(sym) == STT_FUNC && | |
693 | sym->st_name != 0 && | |
81833130 | 694 | sym->st_shndx != SHN_UNDEF; |
a2928c42 ACM |
695 | } |
696 | ||
f1dfa0b1 ACM |
697 | static inline bool elf_sym__is_object(const GElf_Sym *sym) |
698 | { | |
699 | return elf_sym__type(sym) == STT_OBJECT && | |
700 | sym->st_name != 0 && | |
701 | sym->st_shndx != SHN_UNDEF; | |
702 | } | |
703 | ||
6cfcc53e MG |
704 | static inline int elf_sym__is_label(const GElf_Sym *sym) |
705 | { | |
706 | return elf_sym__type(sym) == STT_NOTYPE && | |
707 | sym->st_name != 0 && | |
708 | sym->st_shndx != SHN_UNDEF && | |
709 | sym->st_shndx != SHN_ABS; | |
710 | } | |
711 | ||
712 | static inline const char *elf_sec__name(const GElf_Shdr *shdr, | |
713 | const Elf_Data *secstrs) | |
714 | { | |
715 | return secstrs->d_buf + shdr->sh_name; | |
716 | } | |
717 | ||
718 | static inline int elf_sec__is_text(const GElf_Shdr *shdr, | |
719 | const Elf_Data *secstrs) | |
720 | { | |
721 | return strstr(elf_sec__name(shdr, secstrs), "text") != NULL; | |
722 | } | |
723 | ||
f1dfa0b1 ACM |
724 | static inline bool elf_sec__is_data(const GElf_Shdr *shdr, |
725 | const Elf_Data *secstrs) | |
726 | { | |
727 | return strstr(elf_sec__name(shdr, secstrs), "data") != NULL; | |
728 | } | |
729 | ||
a2928c42 ACM |
730 | static inline const char *elf_sym__name(const GElf_Sym *sym, |
731 | const Elf_Data *symstrs) | |
732 | { | |
733 | return symstrs->d_buf + sym->st_name; | |
734 | } | |
735 | ||
736 | static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, | |
737 | GElf_Shdr *shp, const char *name, | |
83a0944f | 738 | size_t *idx) |
a2928c42 ACM |
739 | { |
740 | Elf_Scn *sec = NULL; | |
741 | size_t cnt = 1; | |
742 | ||
743 | while ((sec = elf_nextscn(elf, sec)) != NULL) { | |
744 | char *str; | |
745 | ||
746 | gelf_getshdr(sec, shp); | |
747 | str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name); | |
748 | if (!strcmp(name, str)) { | |
83a0944f IM |
749 | if (idx) |
750 | *idx = cnt; | |
a2928c42 ACM |
751 | break; |
752 | } | |
753 | ++cnt; | |
754 | } | |
755 | ||
756 | return sec; | |
757 | } | |
758 | ||
8ce998d6 ACM |
759 | #define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \ |
760 | for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \ | |
761 | idx < nr_entries; \ | |
762 | ++idx, pos = gelf_getrel(reldata, idx, &pos_mem)) | |
763 | ||
764 | #define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \ | |
765 | for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \ | |
766 | idx < nr_entries; \ | |
767 | ++idx, pos = gelf_getrela(reldata, idx, &pos_mem)) | |
768 | ||
a25e46c4 ACM |
769 | /* |
770 | * We need to check if we have a .dynsym, so that we can handle the | |
771 | * .plt, synthesizing its symbols, that aren't on the symtabs (be it | |
772 | * .dynsym or .symtab). | |
773 | * And always look at the original dso, not at debuginfo packages, that | |
774 | * have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS). | |
775 | */ | |
82164161 ACM |
776 | static int dso__synthesize_plt_symbols(struct dso *self, struct map *map, |
777 | symbol_filter_t filter) | |
8ce998d6 ACM |
778 | { |
779 | uint32_t nr_rel_entries, idx; | |
780 | GElf_Sym sym; | |
9cffa8d5 | 781 | u64 plt_offset; |
8ce998d6 ACM |
782 | GElf_Shdr shdr_plt; |
783 | struct symbol *f; | |
a25e46c4 | 784 | GElf_Shdr shdr_rel_plt, shdr_dynsym; |
8ce998d6 | 785 | Elf_Data *reldata, *syms, *symstrs; |
a25e46c4 ACM |
786 | Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym; |
787 | size_t dynsym_idx; | |
788 | GElf_Ehdr ehdr; | |
8ce998d6 | 789 | char sympltname[1024]; |
a25e46c4 ACM |
790 | Elf *elf; |
791 | int nr = 0, symidx, fd, err = 0; | |
792 | ||
439d473b | 793 | fd = open(self->long_name, O_RDONLY); |
a25e46c4 ACM |
794 | if (fd < 0) |
795 | goto out; | |
796 | ||
84087126 | 797 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a25e46c4 ACM |
798 | if (elf == NULL) |
799 | goto out_close; | |
800 | ||
801 | if (gelf_getehdr(elf, &ehdr) == NULL) | |
802 | goto out_elf_end; | |
803 | ||
804 | scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym, | |
805 | ".dynsym", &dynsym_idx); | |
806 | if (scn_dynsym == NULL) | |
807 | goto out_elf_end; | |
8ce998d6 | 808 | |
a25e46c4 | 809 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
810 | ".rela.plt", NULL); |
811 | if (scn_plt_rel == NULL) { | |
a25e46c4 | 812 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
813 | ".rel.plt", NULL); |
814 | if (scn_plt_rel == NULL) | |
a25e46c4 | 815 | goto out_elf_end; |
8ce998d6 ACM |
816 | } |
817 | ||
a25e46c4 ACM |
818 | err = -1; |
819 | ||
8ce998d6 | 820 | if (shdr_rel_plt.sh_link != dynsym_idx) |
a25e46c4 | 821 | goto out_elf_end; |
8ce998d6 | 822 | |
a25e46c4 ACM |
823 | if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL) |
824 | goto out_elf_end; | |
8ce998d6 ACM |
825 | |
826 | /* | |
83a0944f | 827 | * Fetch the relocation section to find the idxes to the GOT |
8ce998d6 ACM |
828 | * and the symbols in the .dynsym they refer to. |
829 | */ | |
830 | reldata = elf_getdata(scn_plt_rel, NULL); | |
831 | if (reldata == NULL) | |
a25e46c4 | 832 | goto out_elf_end; |
8ce998d6 ACM |
833 | |
834 | syms = elf_getdata(scn_dynsym, NULL); | |
835 | if (syms == NULL) | |
a25e46c4 | 836 | goto out_elf_end; |
8ce998d6 | 837 | |
a25e46c4 | 838 | scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link); |
8ce998d6 | 839 | if (scn_symstrs == NULL) |
a25e46c4 | 840 | goto out_elf_end; |
8ce998d6 ACM |
841 | |
842 | symstrs = elf_getdata(scn_symstrs, NULL); | |
843 | if (symstrs == NULL) | |
a25e46c4 | 844 | goto out_elf_end; |
8ce998d6 ACM |
845 | |
846 | nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize; | |
847 | plt_offset = shdr_plt.sh_offset; | |
848 | ||
849 | if (shdr_rel_plt.sh_type == SHT_RELA) { | |
850 | GElf_Rela pos_mem, *pos; | |
851 | ||
852 | elf_section__for_each_rela(reldata, pos, pos_mem, idx, | |
853 | nr_rel_entries) { | |
854 | symidx = GELF_R_SYM(pos->r_info); | |
855 | plt_offset += shdr_plt.sh_entsize; | |
856 | gelf_getsym(syms, symidx, &sym); | |
857 | snprintf(sympltname, sizeof(sympltname), | |
858 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
859 | ||
860 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
00a192b3 | 861 | sympltname); |
8ce998d6 | 862 | if (!f) |
a25e46c4 | 863 | goto out_elf_end; |
8ce998d6 | 864 | |
82164161 ACM |
865 | if (filter && filter(map, f)) |
866 | symbol__delete(f); | |
867 | else { | |
6a4694a4 | 868 | symbols__insert(&self->symbols[map->type], f); |
82164161 ACM |
869 | ++nr; |
870 | } | |
8ce998d6 ACM |
871 | } |
872 | } else if (shdr_rel_plt.sh_type == SHT_REL) { | |
873 | GElf_Rel pos_mem, *pos; | |
874 | elf_section__for_each_rel(reldata, pos, pos_mem, idx, | |
875 | nr_rel_entries) { | |
876 | symidx = GELF_R_SYM(pos->r_info); | |
877 | plt_offset += shdr_plt.sh_entsize; | |
878 | gelf_getsym(syms, symidx, &sym); | |
879 | snprintf(sympltname, sizeof(sympltname), | |
880 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
881 | ||
882 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
00a192b3 | 883 | sympltname); |
8ce998d6 | 884 | if (!f) |
a25e46c4 | 885 | goto out_elf_end; |
8ce998d6 | 886 | |
82164161 ACM |
887 | if (filter && filter(map, f)) |
888 | symbol__delete(f); | |
889 | else { | |
6a4694a4 | 890 | symbols__insert(&self->symbols[map->type], f); |
82164161 ACM |
891 | ++nr; |
892 | } | |
8ce998d6 | 893 | } |
8ce998d6 ACM |
894 | } |
895 | ||
a25e46c4 ACM |
896 | err = 0; |
897 | out_elf_end: | |
898 | elf_end(elf); | |
899 | out_close: | |
900 | close(fd); | |
901 | ||
902 | if (err == 0) | |
903 | return nr; | |
904 | out: | |
fe2197b8 ACM |
905 | pr_debug("%s: problems reading %s PLT info.\n", |
906 | __func__, self->long_name); | |
a25e46c4 | 907 | return 0; |
8ce998d6 ACM |
908 | } |
909 | ||
d45868d3 ACM |
910 | static bool elf_sym__is_a(GElf_Sym *self, enum map_type type) |
911 | { | |
912 | switch (type) { | |
913 | case MAP__FUNCTION: | |
914 | return elf_sym__is_function(self); | |
f1dfa0b1 ACM |
915 | case MAP__VARIABLE: |
916 | return elf_sym__is_object(self); | |
d45868d3 ACM |
917 | default: |
918 | return false; | |
919 | } | |
920 | } | |
921 | ||
922 | static bool elf_sec__is_a(GElf_Shdr *self, Elf_Data *secstrs, enum map_type type) | |
923 | { | |
924 | switch (type) { | |
925 | case MAP__FUNCTION: | |
926 | return elf_sec__is_text(self, secstrs); | |
f1dfa0b1 ACM |
927 | case MAP__VARIABLE: |
928 | return elf_sec__is_data(self, secstrs); | |
d45868d3 ACM |
929 | default: |
930 | return false; | |
931 | } | |
932 | } | |
933 | ||
9de89fe7 ACM |
934 | static int dso__load_sym(struct dso *self, struct map *map, const char *name, |
935 | int fd, symbol_filter_t filter, int kmodule) | |
a2928c42 | 936 | { |
9de89fe7 | 937 | struct kmap *kmap = self->kernel ? map__kmap(map) : NULL; |
2e538c4a ACM |
938 | struct map *curr_map = map; |
939 | struct dso *curr_dso = self; | |
6cfcc53e | 940 | Elf_Data *symstrs, *secstrs; |
a2928c42 ACM |
941 | uint32_t nr_syms; |
942 | int err = -1; | |
83a0944f | 943 | uint32_t idx; |
a2928c42 ACM |
944 | GElf_Ehdr ehdr; |
945 | GElf_Shdr shdr; | |
946 | Elf_Data *syms; | |
947 | GElf_Sym sym; | |
a25e46c4 | 948 | Elf_Scn *sec, *sec_strndx; |
a2928c42 | 949 | Elf *elf; |
439d473b | 950 | int nr = 0; |
a2928c42 | 951 | |
84087126 | 952 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a2928c42 | 953 | if (elf == NULL) { |
6beba7ad | 954 | pr_err("%s: cannot read %s ELF file.\n", __func__, name); |
a2928c42 ACM |
955 | goto out_close; |
956 | } | |
957 | ||
958 | if (gelf_getehdr(elf, &ehdr) == NULL) { | |
6beba7ad | 959 | pr_err("%s: cannot get elf header.\n", __func__); |
a2928c42 ACM |
960 | goto out_elf_end; |
961 | } | |
962 | ||
963 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL); | |
8ce998d6 | 964 | if (sec == NULL) { |
a25e46c4 ACM |
965 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL); |
966 | if (sec == NULL) | |
8ce998d6 | 967 | goto out_elf_end; |
8ce998d6 | 968 | } |
a2928c42 ACM |
969 | |
970 | syms = elf_getdata(sec, NULL); | |
971 | if (syms == NULL) | |
972 | goto out_elf_end; | |
973 | ||
974 | sec = elf_getscn(elf, shdr.sh_link); | |
975 | if (sec == NULL) | |
976 | goto out_elf_end; | |
977 | ||
978 | symstrs = elf_getdata(sec, NULL); | |
979 | if (symstrs == NULL) | |
980 | goto out_elf_end; | |
981 | ||
6cfcc53e MG |
982 | sec_strndx = elf_getscn(elf, ehdr.e_shstrndx); |
983 | if (sec_strndx == NULL) | |
984 | goto out_elf_end; | |
985 | ||
986 | secstrs = elf_getdata(sec_strndx, NULL); | |
9b30a26b | 987 | if (secstrs == NULL) |
6cfcc53e MG |
988 | goto out_elf_end; |
989 | ||
a2928c42 ACM |
990 | nr_syms = shdr.sh_size / shdr.sh_entsize; |
991 | ||
e9fbc9dc | 992 | memset(&sym, 0, sizeof(sym)); |
a1645ce1 | 993 | if (self->kernel == DSO_TYPE_USER) { |
d20ff6bd | 994 | self->adjust_symbols = (ehdr.e_type == ET_EXEC || |
30d7a77d ACM |
995 | elf_section_by_name(elf, &ehdr, &shdr, |
996 | ".gnu.prelink_undo", | |
997 | NULL) != NULL); | |
d20ff6bd MG |
998 | } else self->adjust_symbols = 0; |
999 | ||
83a0944f | 1000 | elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) { |
a2928c42 | 1001 | struct symbol *f; |
56b03f3c | 1002 | const char *elf_name = elf_sym__name(&sym, symstrs); |
2e538c4a | 1003 | char *demangled = NULL; |
6cfcc53e MG |
1004 | int is_label = elf_sym__is_label(&sym); |
1005 | const char *section_name; | |
a2928c42 | 1006 | |
9de89fe7 ACM |
1007 | if (kmap && kmap->ref_reloc_sym && kmap->ref_reloc_sym->name && |
1008 | strcmp(elf_name, kmap->ref_reloc_sym->name) == 0) | |
1009 | kmap->ref_reloc_sym->unrelocated_addr = sym.st_value; | |
56b03f3c | 1010 | |
d45868d3 | 1011 | if (!is_label && !elf_sym__is_a(&sym, map->type)) |
a2928c42 ACM |
1012 | continue; |
1013 | ||
1014 | sec = elf_getscn(elf, sym.st_shndx); | |
1015 | if (!sec) | |
1016 | goto out_elf_end; | |
1017 | ||
1018 | gelf_getshdr(sec, &shdr); | |
6cfcc53e | 1019 | |
d45868d3 | 1020 | if (is_label && !elf_sec__is_a(&shdr, secstrs, map->type)) |
6cfcc53e MG |
1021 | continue; |
1022 | ||
1023 | section_name = elf_sec__name(&shdr, secstrs); | |
0b73da3f | 1024 | |
a1645ce1 | 1025 | if (self->kernel != DSO_TYPE_USER || kmodule) { |
2e538c4a ACM |
1026 | char dso_name[PATH_MAX]; |
1027 | ||
1028 | if (strcmp(section_name, | |
b63be8d7 ACM |
1029 | (curr_dso->short_name + |
1030 | self->short_name_len)) == 0) | |
2e538c4a ACM |
1031 | goto new_symbol; |
1032 | ||
1033 | if (strcmp(section_name, ".text") == 0) { | |
1034 | curr_map = map; | |
1035 | curr_dso = self; | |
1036 | goto new_symbol; | |
1037 | } | |
1038 | ||
1039 | snprintf(dso_name, sizeof(dso_name), | |
1040 | "%s%s", self->short_name, section_name); | |
1041 | ||
9de89fe7 | 1042 | curr_map = map_groups__find_by_name(kmap->kmaps, map->type, dso_name); |
2e538c4a ACM |
1043 | if (curr_map == NULL) { |
1044 | u64 start = sym.st_value; | |
1045 | ||
1046 | if (kmodule) | |
1047 | start += map->start + shdr.sh_offset; | |
1048 | ||
00a192b3 | 1049 | curr_dso = dso__new(dso_name); |
2e538c4a ACM |
1050 | if (curr_dso == NULL) |
1051 | goto out_elf_end; | |
a1645ce1 | 1052 | curr_dso->kernel = self->kernel; |
3610583c | 1053 | curr_map = map__new2(start, curr_dso, |
6275ce2d | 1054 | map->type); |
2e538c4a ACM |
1055 | if (curr_map == NULL) { |
1056 | dso__delete(curr_dso); | |
1057 | goto out_elf_end; | |
1058 | } | |
ed52ce2e ACM |
1059 | curr_map->map_ip = identity__map_ip; |
1060 | curr_map->unmap_ip = identity__map_ip; | |
b0a9ab62 | 1061 | curr_dso->origin = self->origin; |
9de89fe7 | 1062 | map_groups__insert(kmap->kmaps, curr_map); |
a1645ce1 | 1063 | dsos__add(&self->node, curr_dso); |
6275ce2d | 1064 | dso__set_loaded(curr_dso, map->type); |
2e538c4a ACM |
1065 | } else |
1066 | curr_dso = curr_map->dso; | |
1067 | ||
1068 | goto new_symbol; | |
af427bf5 ACM |
1069 | } |
1070 | ||
2e538c4a | 1071 | if (curr_dso->adjust_symbols) { |
29a9f66d ACM |
1072 | pr_debug4("%s: adjusting symbol: st_value: %#Lx " |
1073 | "sh_addr: %#Lx sh_offset: %#Lx\n", __func__, | |
1074 | (u64)sym.st_value, (u64)shdr.sh_addr, | |
1075 | (u64)shdr.sh_offset); | |
f5812a7a | 1076 | sym.st_value -= shdr.sh_addr - shdr.sh_offset; |
af427bf5 | 1077 | } |
28ac909b ACM |
1078 | /* |
1079 | * We need to figure out if the object was created from C++ sources | |
1080 | * DWARF DW_compile_unit has this, but we don't always have access | |
1081 | * to it... | |
1082 | */ | |
83a0944f | 1083 | demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI); |
28ac909b | 1084 | if (demangled != NULL) |
83a0944f | 1085 | elf_name = demangled; |
2e538c4a | 1086 | new_symbol: |
00a192b3 | 1087 | f = symbol__new(sym.st_value, sym.st_size, elf_name); |
28ac909b | 1088 | free(demangled); |
a2928c42 ACM |
1089 | if (!f) |
1090 | goto out_elf_end; | |
1091 | ||
2e538c4a | 1092 | if (filter && filter(curr_map, f)) |
00a192b3 | 1093 | symbol__delete(f); |
69ee69f6 | 1094 | else { |
6a4694a4 | 1095 | symbols__insert(&curr_dso->symbols[curr_map->type], f); |
69ee69f6 ACM |
1096 | nr++; |
1097 | } | |
a2928c42 ACM |
1098 | } |
1099 | ||
2e538c4a ACM |
1100 | /* |
1101 | * For misannotated, zeroed, ASM function sizes. | |
1102 | */ | |
6275ce2d | 1103 | if (nr > 0) { |
6a4694a4 | 1104 | symbols__fixup_end(&self->symbols[map->type]); |
6275ce2d ACM |
1105 | if (kmap) { |
1106 | /* | |
1107 | * We need to fixup this here too because we create new | |
1108 | * maps here, for things like vsyscall sections. | |
1109 | */ | |
1110 | __map_groups__fixup_end(kmap->kmaps, map->type); | |
1111 | } | |
1112 | } | |
a2928c42 ACM |
1113 | err = nr; |
1114 | out_elf_end: | |
1115 | elf_end(elf); | |
1116 | out_close: | |
1117 | return err; | |
1118 | } | |
1119 | ||
78075caa ACM |
1120 | static bool dso__build_id_equal(const struct dso *self, u8 *build_id) |
1121 | { | |
1122 | return memcmp(self->build_id, build_id, sizeof(self->build_id)) == 0; | |
1123 | } | |
1124 | ||
a1645ce1 | 1125 | bool __dsos__read_build_ids(struct list_head *head, bool with_hits) |
57f395a7 | 1126 | { |
e30a3d12 | 1127 | bool have_build_id = false; |
57f395a7 FW |
1128 | struct dso *pos; |
1129 | ||
6122e4e4 ACM |
1130 | list_for_each_entry(pos, head, node) { |
1131 | if (with_hits && !pos->hit) | |
1132 | continue; | |
e30a3d12 ACM |
1133 | if (filename__read_build_id(pos->long_name, pos->build_id, |
1134 | sizeof(pos->build_id)) > 0) { | |
1135 | have_build_id = true; | |
1136 | pos->has_build_id = true; | |
1137 | } | |
6122e4e4 | 1138 | } |
57f395a7 | 1139 | |
e30a3d12 | 1140 | return have_build_id; |
57f395a7 FW |
1141 | } |
1142 | ||
fd7a346e ACM |
1143 | /* |
1144 | * Align offset to 4 bytes as needed for note name and descriptor data. | |
1145 | */ | |
1146 | #define NOTE_ALIGN(n) (((n) + 3) & -4U) | |
1147 | ||
2643ce11 | 1148 | int filename__read_build_id(const char *filename, void *bf, size_t size) |
4d1e00a8 | 1149 | { |
2643ce11 | 1150 | int fd, err = -1; |
4d1e00a8 ACM |
1151 | GElf_Ehdr ehdr; |
1152 | GElf_Shdr shdr; | |
fd7a346e | 1153 | Elf_Data *data; |
4d1e00a8 | 1154 | Elf_Scn *sec; |
e57cfcda | 1155 | Elf_Kind ek; |
fd7a346e | 1156 | void *ptr; |
4d1e00a8 | 1157 | Elf *elf; |
4d1e00a8 | 1158 | |
2643ce11 ACM |
1159 | if (size < BUILD_ID_SIZE) |
1160 | goto out; | |
1161 | ||
1162 | fd = open(filename, O_RDONLY); | |
4d1e00a8 ACM |
1163 | if (fd < 0) |
1164 | goto out; | |
1165 | ||
84087126 | 1166 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
4d1e00a8 | 1167 | if (elf == NULL) { |
8d06367f | 1168 | pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename); |
4d1e00a8 ACM |
1169 | goto out_close; |
1170 | } | |
1171 | ||
e57cfcda PE |
1172 | ek = elf_kind(elf); |
1173 | if (ek != ELF_K_ELF) | |
1174 | goto out_elf_end; | |
1175 | ||
4d1e00a8 | 1176 | if (gelf_getehdr(elf, &ehdr) == NULL) { |
6beba7ad | 1177 | pr_err("%s: cannot get elf header.\n", __func__); |
4d1e00a8 ACM |
1178 | goto out_elf_end; |
1179 | } | |
1180 | ||
2643ce11 ACM |
1181 | sec = elf_section_by_name(elf, &ehdr, &shdr, |
1182 | ".note.gnu.build-id", NULL); | |
fd7a346e ACM |
1183 | if (sec == NULL) { |
1184 | sec = elf_section_by_name(elf, &ehdr, &shdr, | |
1185 | ".notes", NULL); | |
1186 | if (sec == NULL) | |
1187 | goto out_elf_end; | |
1188 | } | |
4d1e00a8 | 1189 | |
fd7a346e ACM |
1190 | data = elf_getdata(sec, NULL); |
1191 | if (data == NULL) | |
4d1e00a8 | 1192 | goto out_elf_end; |
fd7a346e ACM |
1193 | |
1194 | ptr = data->d_buf; | |
1195 | while (ptr < (data->d_buf + data->d_size)) { | |
1196 | GElf_Nhdr *nhdr = ptr; | |
1197 | int namesz = NOTE_ALIGN(nhdr->n_namesz), | |
1198 | descsz = NOTE_ALIGN(nhdr->n_descsz); | |
1199 | const char *name; | |
1200 | ||
1201 | ptr += sizeof(*nhdr); | |
1202 | name = ptr; | |
1203 | ptr += namesz; | |
1204 | if (nhdr->n_type == NT_GNU_BUILD_ID && | |
1205 | nhdr->n_namesz == sizeof("GNU")) { | |
1206 | if (memcmp(name, "GNU", sizeof("GNU")) == 0) { | |
1207 | memcpy(bf, ptr, BUILD_ID_SIZE); | |
1208 | err = BUILD_ID_SIZE; | |
1209 | break; | |
1210 | } | |
1211 | } | |
1212 | ptr += descsz; | |
1213 | } | |
2643ce11 ACM |
1214 | out_elf_end: |
1215 | elf_end(elf); | |
1216 | out_close: | |
1217 | close(fd); | |
1218 | out: | |
1219 | return err; | |
1220 | } | |
1221 | ||
f1617b40 ACM |
1222 | int sysfs__read_build_id(const char *filename, void *build_id, size_t size) |
1223 | { | |
1224 | int fd, err = -1; | |
1225 | ||
1226 | if (size < BUILD_ID_SIZE) | |
1227 | goto out; | |
1228 | ||
1229 | fd = open(filename, O_RDONLY); | |
1230 | if (fd < 0) | |
1231 | goto out; | |
1232 | ||
1233 | while (1) { | |
1234 | char bf[BUFSIZ]; | |
1235 | GElf_Nhdr nhdr; | |
1236 | int namesz, descsz; | |
1237 | ||
1238 | if (read(fd, &nhdr, sizeof(nhdr)) != sizeof(nhdr)) | |
1239 | break; | |
1240 | ||
fd7a346e ACM |
1241 | namesz = NOTE_ALIGN(nhdr.n_namesz); |
1242 | descsz = NOTE_ALIGN(nhdr.n_descsz); | |
f1617b40 ACM |
1243 | if (nhdr.n_type == NT_GNU_BUILD_ID && |
1244 | nhdr.n_namesz == sizeof("GNU")) { | |
1245 | if (read(fd, bf, namesz) != namesz) | |
1246 | break; | |
1247 | if (memcmp(bf, "GNU", sizeof("GNU")) == 0) { | |
1248 | if (read(fd, build_id, | |
1249 | BUILD_ID_SIZE) == BUILD_ID_SIZE) { | |
1250 | err = 0; | |
1251 | break; | |
1252 | } | |
1253 | } else if (read(fd, bf, descsz) != descsz) | |
1254 | break; | |
1255 | } else { | |
1256 | int n = namesz + descsz; | |
1257 | if (read(fd, bf, n) != n) | |
1258 | break; | |
1259 | } | |
1260 | } | |
1261 | close(fd); | |
1262 | out: | |
1263 | return err; | |
1264 | } | |
1265 | ||
94cb9e38 ACM |
1266 | char dso__symtab_origin(const struct dso *self) |
1267 | { | |
1268 | static const char origin[] = { | |
1269 | [DSO__ORIG_KERNEL] = 'k', | |
1270 | [DSO__ORIG_JAVA_JIT] = 'j', | |
4cf40131 | 1271 | [DSO__ORIG_BUILD_ID_CACHE] = 'B', |
94cb9e38 ACM |
1272 | [DSO__ORIG_FEDORA] = 'f', |
1273 | [DSO__ORIG_UBUNTU] = 'u', | |
1274 | [DSO__ORIG_BUILDID] = 'b', | |
1275 | [DSO__ORIG_DSO] = 'd', | |
439d473b | 1276 | [DSO__ORIG_KMODULE] = 'K', |
a1645ce1 ZY |
1277 | [DSO__ORIG_GUEST_KERNEL] = 'g', |
1278 | [DSO__ORIG_GUEST_KMODULE] = 'G', | |
94cb9e38 ACM |
1279 | }; |
1280 | ||
1281 | if (self == NULL || self->origin == DSO__ORIG_NOT_FOUND) | |
1282 | return '!'; | |
1283 | return origin[self->origin]; | |
1284 | } | |
1285 | ||
9de89fe7 | 1286 | int dso__load(struct dso *self, struct map *map, symbol_filter_t filter) |
a2928c42 | 1287 | { |
4d1e00a8 | 1288 | int size = PATH_MAX; |
c338aee8 | 1289 | char *name; |
d3379ab9 | 1290 | u8 build_id[BUILD_ID_SIZE]; |
4cf40131 | 1291 | char build_id_hex[BUILD_ID_SIZE * 2 + 1]; |
a2928c42 ACM |
1292 | int ret = -1; |
1293 | int fd; | |
23346f21 | 1294 | struct machine *machine; |
a1645ce1 | 1295 | const char *root_dir; |
a2928c42 | 1296 | |
3610583c | 1297 | dso__set_loaded(self, map->type); |
66bd8424 | 1298 | |
a1645ce1 | 1299 | if (self->kernel == DSO_TYPE_KERNEL) |
9de89fe7 | 1300 | return dso__load_kernel_sym(self, map, filter); |
a1645ce1 ZY |
1301 | else if (self->kernel == DSO_TYPE_GUEST_KERNEL) |
1302 | return dso__load_guest_kernel_sym(self, map, filter); | |
1303 | ||
23346f21 ACM |
1304 | if (map->groups && map->groups->machine) |
1305 | machine = map->groups->machine; | |
a1645ce1 | 1306 | else |
23346f21 | 1307 | machine = NULL; |
c338aee8 ACM |
1308 | |
1309 | name = malloc(size); | |
a2928c42 ACM |
1310 | if (!name) |
1311 | return -1; | |
1312 | ||
30d7a77d | 1313 | self->adjust_symbols = 0; |
f5812a7a | 1314 | |
94cb9e38 | 1315 | if (strncmp(self->name, "/tmp/perf-", 10) == 0) { |
6beba7ad | 1316 | ret = dso__load_perf_map(self, map, filter); |
94cb9e38 ACM |
1317 | self->origin = ret > 0 ? DSO__ORIG_JAVA_JIT : |
1318 | DSO__ORIG_NOT_FOUND; | |
1319 | return ret; | |
1320 | } | |
1321 | ||
4cf40131 | 1322 | self->origin = DSO__ORIG_BUILD_ID_CACHE; |
80d496be | 1323 | |
4cf40131 ACM |
1324 | if (self->has_build_id) { |
1325 | build_id__sprintf(self->build_id, sizeof(self->build_id), | |
1326 | build_id_hex); | |
1327 | snprintf(name, size, "%s/%s/.build-id/%.2s/%s", | |
1328 | getenv("HOME"), DEBUG_CACHE_DIR, | |
1329 | build_id_hex, build_id_hex + 2); | |
1330 | goto open_file; | |
1331 | } | |
a2928c42 ACM |
1332 | more: |
1333 | do { | |
94cb9e38 ACM |
1334 | self->origin++; |
1335 | switch (self->origin) { | |
1336 | case DSO__ORIG_FEDORA: | |
439d473b ACM |
1337 | snprintf(name, size, "/usr/lib/debug%s.debug", |
1338 | self->long_name); | |
a2928c42 | 1339 | break; |
94cb9e38 | 1340 | case DSO__ORIG_UBUNTU: |
439d473b ACM |
1341 | snprintf(name, size, "/usr/lib/debug%s", |
1342 | self->long_name); | |
a2928c42 | 1343 | break; |
94cb9e38 | 1344 | case DSO__ORIG_BUILDID: |
d3379ab9 ACM |
1345 | if (filename__read_build_id(self->long_name, build_id, |
1346 | sizeof(build_id))) { | |
d3379ab9 ACM |
1347 | build_id__sprintf(build_id, sizeof(build_id), |
1348 | build_id_hex); | |
4d1e00a8 ACM |
1349 | snprintf(name, size, |
1350 | "/usr/lib/debug/.build-id/%.2s/%s.debug", | |
d3379ab9 ACM |
1351 | build_id_hex, build_id_hex + 2); |
1352 | if (self->has_build_id) | |
1353 | goto compare_build_id; | |
1354 | break; | |
4d1e00a8 | 1355 | } |
94cb9e38 | 1356 | self->origin++; |
4d1e00a8 | 1357 | /* Fall thru */ |
94cb9e38 | 1358 | case DSO__ORIG_DSO: |
439d473b | 1359 | snprintf(name, size, "%s", self->long_name); |
a2928c42 | 1360 | break; |
a1645ce1 | 1361 | case DSO__ORIG_GUEST_KMODULE: |
23346f21 ACM |
1362 | if (map->groups && map->groups->machine) |
1363 | root_dir = map->groups->machine->root_dir; | |
a1645ce1 ZY |
1364 | else |
1365 | root_dir = ""; | |
1366 | snprintf(name, size, "%s%s", root_dir, self->long_name); | |
1367 | break; | |
a2928c42 ACM |
1368 | |
1369 | default: | |
1370 | goto out; | |
1371 | } | |
a2928c42 | 1372 | |
8d06367f | 1373 | if (self->has_build_id) { |
d3379ab9 ACM |
1374 | if (filename__read_build_id(name, build_id, |
1375 | sizeof(build_id)) < 0) | |
8d06367f | 1376 | goto more; |
8d06367f | 1377 | compare_build_id: |
78075caa | 1378 | if (!dso__build_id_equal(self, build_id)) |
8d06367f ACM |
1379 | goto more; |
1380 | } | |
4cf40131 | 1381 | open_file: |
a2928c42 ACM |
1382 | fd = open(name, O_RDONLY); |
1383 | } while (fd < 0); | |
1384 | ||
9de89fe7 | 1385 | ret = dso__load_sym(self, map, name, fd, filter, 0); |
a2928c42 ACM |
1386 | close(fd); |
1387 | ||
1388 | /* | |
1389 | * Some people seem to have debuginfo files _WITHOUT_ debug info!?!? | |
1390 | */ | |
1391 | if (!ret) | |
1392 | goto more; | |
1393 | ||
a25e46c4 | 1394 | if (ret > 0) { |
82164161 | 1395 | int nr_plt = dso__synthesize_plt_symbols(self, map, filter); |
a25e46c4 ACM |
1396 | if (nr_plt > 0) |
1397 | ret += nr_plt; | |
1398 | } | |
a2928c42 ACM |
1399 | out: |
1400 | free(name); | |
1340e6bb ACM |
1401 | if (ret < 0 && strstr(self->name, " (deleted)") != NULL) |
1402 | return 0; | |
a2928c42 ACM |
1403 | return ret; |
1404 | } | |
1405 | ||
79406cd7 ACM |
1406 | struct map *map_groups__find_by_name(struct map_groups *self, |
1407 | enum map_type type, const char *name) | |
439d473b ACM |
1408 | { |
1409 | struct rb_node *nd; | |
1410 | ||
79406cd7 | 1411 | for (nd = rb_first(&self->maps[type]); nd; nd = rb_next(nd)) { |
439d473b ACM |
1412 | struct map *map = rb_entry(nd, struct map, rb_node); |
1413 | ||
b7cece76 | 1414 | if (map->dso && strcmp(map->dso->short_name, name) == 0) |
439d473b ACM |
1415 | return map; |
1416 | } | |
1417 | ||
1418 | return NULL; | |
1419 | } | |
1420 | ||
a1645ce1 ZY |
1421 | static int dso__kernel_module_get_build_id(struct dso *self, |
1422 | const char *root_dir) | |
b7cece76 ACM |
1423 | { |
1424 | char filename[PATH_MAX]; | |
1425 | /* | |
1426 | * kernel module short names are of the form "[module]" and | |
1427 | * we need just "module" here. | |
1428 | */ | |
1429 | const char *name = self->short_name + 1; | |
1430 | ||
1431 | snprintf(filename, sizeof(filename), | |
a1645ce1 ZY |
1432 | "%s/sys/module/%.*s/notes/.note.gnu.build-id", |
1433 | root_dir, (int)strlen(name) - 1, name); | |
b7cece76 ACM |
1434 | |
1435 | if (sysfs__read_build_id(filename, self->build_id, | |
1436 | sizeof(self->build_id)) == 0) | |
1437 | self->has_build_id = true; | |
1438 | ||
1439 | return 0; | |
1440 | } | |
1441 | ||
a1645ce1 ZY |
1442 | static int map_groups__set_modules_path_dir(struct map_groups *self, |
1443 | const char *dir_name) | |
6cfcc53e | 1444 | { |
439d473b | 1445 | struct dirent *dent; |
5aab621b | 1446 | DIR *dir = opendir(dir_name); |
6cfcc53e | 1447 | |
439d473b | 1448 | if (!dir) { |
5aab621b | 1449 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); |
439d473b ACM |
1450 | return -1; |
1451 | } | |
6cfcc53e | 1452 | |
439d473b ACM |
1453 | while ((dent = readdir(dir)) != NULL) { |
1454 | char path[PATH_MAX]; | |
a1645ce1 ZY |
1455 | struct stat st; |
1456 | ||
1457 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
1458 | sprintf(path, "%s/%s", dir_name, dent->d_name); | |
1459 | if (stat(path, &st)) | |
1460 | continue; | |
439d473b | 1461 | |
a1645ce1 | 1462 | if (S_ISDIR(st.st_mode)) { |
439d473b ACM |
1463 | if (!strcmp(dent->d_name, ".") || |
1464 | !strcmp(dent->d_name, "..")) | |
1465 | continue; | |
1466 | ||
1467 | snprintf(path, sizeof(path), "%s/%s", | |
5aab621b | 1468 | dir_name, dent->d_name); |
9de89fe7 | 1469 | if (map_groups__set_modules_path_dir(self, path) < 0) |
439d473b ACM |
1470 | goto failure; |
1471 | } else { | |
1472 | char *dot = strrchr(dent->d_name, '.'), | |
1473 | dso_name[PATH_MAX]; | |
1474 | struct map *map; | |
cfc10d3b | 1475 | char *long_name; |
439d473b ACM |
1476 | |
1477 | if (dot == NULL || strcmp(dot, ".ko")) | |
1478 | continue; | |
1479 | snprintf(dso_name, sizeof(dso_name), "[%.*s]", | |
1480 | (int)(dot - dent->d_name), dent->d_name); | |
1481 | ||
a2a99e8e | 1482 | strxfrchar(dso_name, '-', '_'); |
9de89fe7 | 1483 | map = map_groups__find_by_name(self, MAP__FUNCTION, dso_name); |
439d473b ACM |
1484 | if (map == NULL) |
1485 | continue; | |
1486 | ||
1487 | snprintf(path, sizeof(path), "%s/%s", | |
5aab621b | 1488 | dir_name, dent->d_name); |
439d473b | 1489 | |
cfc10d3b ACM |
1490 | long_name = strdup(path); |
1491 | if (long_name == NULL) | |
439d473b | 1492 | goto failure; |
cfc10d3b | 1493 | dso__set_long_name(map->dso, long_name); |
a1645ce1 | 1494 | dso__kernel_module_get_build_id(map->dso, ""); |
439d473b | 1495 | } |
439d473b | 1496 | } |
6cfcc53e | 1497 | |
c338aee8 | 1498 | return 0; |
439d473b ACM |
1499 | failure: |
1500 | closedir(dir); | |
1501 | return -1; | |
1502 | } | |
6cfcc53e | 1503 | |
a1645ce1 | 1504 | static char *get_kernel_version(const char *root_dir) |
439d473b | 1505 | { |
a1645ce1 ZY |
1506 | char version[PATH_MAX]; |
1507 | FILE *file; | |
1508 | char *name, *tmp; | |
1509 | const char *prefix = "Linux version "; | |
1510 | ||
1511 | sprintf(version, "%s/proc/version", root_dir); | |
1512 | file = fopen(version, "r"); | |
1513 | if (!file) | |
1514 | return NULL; | |
1515 | ||
1516 | version[0] = '\0'; | |
1517 | tmp = fgets(version, sizeof(version), file); | |
1518 | fclose(file); | |
1519 | ||
1520 | name = strstr(version, prefix); | |
1521 | if (!name) | |
1522 | return NULL; | |
1523 | name += strlen(prefix); | |
1524 | tmp = strchr(name, ' '); | |
1525 | if (tmp) | |
1526 | *tmp = '\0'; | |
1527 | ||
1528 | return strdup(name); | |
1529 | } | |
1530 | ||
1531 | static int map_groups__set_modules_path(struct map_groups *self, | |
1532 | const char *root_dir) | |
1533 | { | |
1534 | char *version; | |
439d473b | 1535 | char modules_path[PATH_MAX]; |
6cfcc53e | 1536 | |
a1645ce1 ZY |
1537 | version = get_kernel_version(root_dir); |
1538 | if (!version) | |
439d473b | 1539 | return -1; |
6cfcc53e | 1540 | |
a1645ce1 ZY |
1541 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s/kernel", |
1542 | root_dir, version); | |
1543 | free(version); | |
6cfcc53e | 1544 | |
9de89fe7 | 1545 | return map_groups__set_modules_path_dir(self, modules_path); |
6cfcc53e MG |
1546 | } |
1547 | ||
439d473b ACM |
1548 | /* |
1549 | * Constructor variant for modules (where we know from /proc/modules where | |
1550 | * they are loaded) and for vmlinux, where only after we load all the | |
1551 | * symbols we'll know where it starts and ends. | |
1552 | */ | |
3610583c | 1553 | static struct map *map__new2(u64 start, struct dso *dso, enum map_type type) |
6cfcc53e | 1554 | { |
5aab621b ACM |
1555 | struct map *self = calloc(1, (sizeof(*self) + |
1556 | (dso->kernel ? sizeof(struct kmap) : 0))); | |
439d473b | 1557 | if (self != NULL) { |
439d473b | 1558 | /* |
afb7b4f0 | 1559 | * ->end will be filled after we load all the symbols |
439d473b | 1560 | */ |
3610583c | 1561 | map__init(self, type, start, 0, 0, dso); |
439d473b | 1562 | } |
afb7b4f0 | 1563 | |
439d473b ACM |
1564 | return self; |
1565 | } | |
1566 | ||
9de89fe7 | 1567 | struct map *map_groups__new_module(struct map_groups *self, u64 start, |
a1645ce1 | 1568 | const char *filename, |
23346f21 | 1569 | struct machine *machine) |
b7cece76 ACM |
1570 | { |
1571 | struct map *map; | |
a1645ce1 | 1572 | struct dso *dso; |
b7cece76 | 1573 | |
23346f21 | 1574 | dso = __dsos__findnew(&machine->kernel_dsos, filename); |
b7cece76 ACM |
1575 | if (dso == NULL) |
1576 | return NULL; | |
1577 | ||
1578 | map = map__new2(start, dso, MAP__FUNCTION); | |
1579 | if (map == NULL) | |
1580 | return NULL; | |
1581 | ||
23346f21 | 1582 | if (machine__is_host(machine)) |
a1645ce1 ZY |
1583 | dso->origin = DSO__ORIG_KMODULE; |
1584 | else | |
1585 | dso->origin = DSO__ORIG_GUEST_KMODULE; | |
9de89fe7 | 1586 | map_groups__insert(self, map); |
b7cece76 ACM |
1587 | return map; |
1588 | } | |
1589 | ||
23346f21 | 1590 | static int map_groups__create_modules(struct machine *machine) |
439d473b ACM |
1591 | { |
1592 | char *line = NULL; | |
1593 | size_t n; | |
a1645ce1 | 1594 | FILE *file; |
439d473b | 1595 | struct map *map; |
a1645ce1 ZY |
1596 | const char *root_dir; |
1597 | const char *modules; | |
1598 | char path[PATH_MAX]; | |
1599 | ||
23346f21 | 1600 | if (machine__is_default_guest(machine)) |
a1645ce1 ZY |
1601 | modules = symbol_conf.default_guest_modules; |
1602 | else { | |
23346f21 | 1603 | sprintf(path, "%s/proc/modules", machine->root_dir); |
a1645ce1 ZY |
1604 | modules = path; |
1605 | } | |
6cfcc53e | 1606 | |
a1645ce1 | 1607 | file = fopen(modules, "r"); |
439d473b ACM |
1608 | if (file == NULL) |
1609 | return -1; | |
6cfcc53e | 1610 | |
23346f21 | 1611 | root_dir = machine->root_dir; |
a1645ce1 | 1612 | |
439d473b ACM |
1613 | while (!feof(file)) { |
1614 | char name[PATH_MAX]; | |
1615 | u64 start; | |
439d473b ACM |
1616 | char *sep; |
1617 | int line_len; | |
6cfcc53e | 1618 | |
439d473b ACM |
1619 | line_len = getline(&line, &n, file); |
1620 | if (line_len < 0) | |
1621 | break; | |
1622 | ||
1623 | if (!line) | |
1624 | goto out_failure; | |
1625 | ||
1626 | line[--line_len] = '\0'; /* \n */ | |
1627 | ||
1628 | sep = strrchr(line, 'x'); | |
1629 | if (sep == NULL) | |
1630 | continue; | |
1631 | ||
1632 | hex2u64(sep + 1, &start); | |
1633 | ||
1634 | sep = strchr(line, ' '); | |
1635 | if (sep == NULL) | |
1636 | continue; | |
1637 | ||
1638 | *sep = '\0'; | |
1639 | ||
1640 | snprintf(name, sizeof(name), "[%s]", line); | |
23346f21 ACM |
1641 | map = map_groups__new_module(&machine->kmaps, start, |
1642 | name, machine); | |
b7cece76 | 1643 | if (map == NULL) |
439d473b | 1644 | goto out_delete_line; |
a1645ce1 | 1645 | dso__kernel_module_get_build_id(map->dso, root_dir); |
6cfcc53e | 1646 | } |
439d473b ACM |
1647 | |
1648 | free(line); | |
1649 | fclose(file); | |
1650 | ||
23346f21 | 1651 | return map_groups__set_modules_path(&machine->kmaps, root_dir); |
439d473b ACM |
1652 | |
1653 | out_delete_line: | |
1654 | free(line); | |
1655 | out_failure: | |
1656 | return -1; | |
6cfcc53e MG |
1657 | } |
1658 | ||
9958e1f0 | 1659 | static int dso__load_vmlinux(struct dso *self, struct map *map, |
6beba7ad | 1660 | const char *vmlinux, symbol_filter_t filter) |
a2928c42 | 1661 | { |
fbd733b8 | 1662 | int err = -1, fd; |
a2928c42 | 1663 | |
fbd733b8 ACM |
1664 | if (self->has_build_id) { |
1665 | u8 build_id[BUILD_ID_SIZE]; | |
1666 | ||
1667 | if (filename__read_build_id(vmlinux, build_id, | |
1668 | sizeof(build_id)) < 0) { | |
1669 | pr_debug("No build_id in %s, ignoring it\n", vmlinux); | |
1670 | return -1; | |
1671 | } | |
1672 | if (!dso__build_id_equal(self, build_id)) { | |
1673 | char expected_build_id[BUILD_ID_SIZE * 2 + 1], | |
1674 | vmlinux_build_id[BUILD_ID_SIZE * 2 + 1]; | |
1675 | ||
1676 | build_id__sprintf(self->build_id, | |
1677 | sizeof(self->build_id), | |
1678 | expected_build_id); | |
1679 | build_id__sprintf(build_id, sizeof(build_id), | |
1680 | vmlinux_build_id); | |
1681 | pr_debug("build_id in %s is %s while expected is %s, " | |
1682 | "ignoring it\n", vmlinux, vmlinux_build_id, | |
1683 | expected_build_id); | |
1684 | return -1; | |
1685 | } | |
1686 | } | |
66bd8424 | 1687 | |
fbd733b8 | 1688 | fd = open(vmlinux, O_RDONLY); |
a2928c42 ACM |
1689 | if (fd < 0) |
1690 | return -1; | |
1691 | ||
3610583c | 1692 | dso__set_loaded(self, map->type); |
9de89fe7 | 1693 | err = dso__load_sym(self, map, vmlinux, fd, filter, 0); |
a2928c42 ACM |
1694 | close(fd); |
1695 | ||
3846df2e ACM |
1696 | if (err > 0) |
1697 | pr_debug("Using %s for symbols\n", vmlinux); | |
1698 | ||
a2928c42 ACM |
1699 | return err; |
1700 | } | |
1701 | ||
a19afe46 | 1702 | int dso__load_vmlinux_path(struct dso *self, struct map *map, |
9de89fe7 | 1703 | symbol_filter_t filter) |
a19afe46 ACM |
1704 | { |
1705 | int i, err = 0; | |
1706 | ||
1707 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", | |
1708 | vmlinux_path__nr_entries); | |
1709 | ||
1710 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { | |
9de89fe7 | 1711 | err = dso__load_vmlinux(self, map, vmlinux_path[i], filter); |
a19afe46 | 1712 | if (err > 0) { |
a19afe46 ACM |
1713 | dso__set_long_name(self, strdup(vmlinux_path[i])); |
1714 | break; | |
1715 | } | |
1716 | } | |
1717 | ||
1718 | return err; | |
1719 | } | |
1720 | ||
c338aee8 | 1721 | static int dso__load_kernel_sym(struct dso *self, struct map *map, |
9de89fe7 | 1722 | symbol_filter_t filter) |
a827c875 | 1723 | { |
cc612d81 | 1724 | int err; |
9e201442 ACM |
1725 | const char *kallsyms_filename = NULL; |
1726 | char *kallsyms_allocated_filename = NULL; | |
dc8d6ab2 ACM |
1727 | /* |
1728 | * Step 1: if the user specified a vmlinux filename, use it and only | |
1729 | * it, reporting errors to the user if it cannot be used. | |
1730 | * | |
1731 | * For instance, try to analyse an ARM perf.data file _without_ a | |
1732 | * build-id, or if the user specifies the wrong path to the right | |
1733 | * vmlinux file, obviously we can't fallback to another vmlinux (a | |
1734 | * x86_86 one, on the machine where analysis is being performed, say), | |
1735 | * or worse, /proc/kallsyms. | |
1736 | * | |
1737 | * If the specified file _has_ a build-id and there is a build-id | |
1738 | * section in the perf.data file, we will still do the expected | |
1739 | * validation in dso__load_vmlinux and will bail out if they don't | |
1740 | * match. | |
1741 | */ | |
1742 | if (symbol_conf.vmlinux_name != NULL) { | |
9de89fe7 | 1743 | err = dso__load_vmlinux(self, map, |
dc8d6ab2 ACM |
1744 | symbol_conf.vmlinux_name, filter); |
1745 | goto out_try_fixup; | |
1746 | } | |
cc612d81 ACM |
1747 | |
1748 | if (vmlinux_path != NULL) { | |
9de89fe7 | 1749 | err = dso__load_vmlinux_path(self, map, filter); |
a19afe46 ACM |
1750 | if (err > 0) |
1751 | goto out_fixup; | |
cc612d81 ACM |
1752 | } |
1753 | ||
b7cece76 ACM |
1754 | /* |
1755 | * Say the kernel DSO was created when processing the build-id header table, | |
1756 | * we have a build-id, so check if it is the same as the running kernel, | |
1757 | * using it if it is. | |
1758 | */ | |
1759 | if (self->has_build_id) { | |
1760 | u8 kallsyms_build_id[BUILD_ID_SIZE]; | |
9e201442 | 1761 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; |
b7cece76 ACM |
1762 | |
1763 | if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id, | |
8d0591f6 | 1764 | sizeof(kallsyms_build_id)) == 0) { |
9e201442 ACM |
1765 | if (dso__build_id_equal(self, kallsyms_build_id)) { |
1766 | kallsyms_filename = "/proc/kallsyms"; | |
8d0591f6 | 1767 | goto do_kallsyms; |
9e201442 | 1768 | } |
8d0591f6 | 1769 | } |
dc8d6ab2 ACM |
1770 | /* |
1771 | * Now look if we have it on the build-id cache in | |
1772 | * $HOME/.debug/[kernel.kallsyms]. | |
1773 | */ | |
9e201442 ACM |
1774 | build_id__sprintf(self->build_id, sizeof(self->build_id), |
1775 | sbuild_id); | |
1776 | ||
1777 | if (asprintf(&kallsyms_allocated_filename, | |
1778 | "%s/.debug/[kernel.kallsyms]/%s", | |
3846df2e ACM |
1779 | getenv("HOME"), sbuild_id) == -1) { |
1780 | pr_err("Not enough memory for kallsyms file lookup\n"); | |
dc8d6ab2 | 1781 | return -1; |
3846df2e | 1782 | } |
dc8d6ab2 | 1783 | |
19fc2ded ACM |
1784 | kallsyms_filename = kallsyms_allocated_filename; |
1785 | ||
dc8d6ab2 | 1786 | if (access(kallsyms_filename, F_OK)) { |
3846df2e ACM |
1787 | pr_err("No kallsyms or vmlinux with build-id %s " |
1788 | "was found\n", sbuild_id); | |
9e201442 | 1789 | free(kallsyms_allocated_filename); |
dc8d6ab2 | 1790 | return -1; |
9e201442 | 1791 | } |
dc8d6ab2 ACM |
1792 | } else { |
1793 | /* | |
1794 | * Last resort, if we don't have a build-id and couldn't find | |
1795 | * any vmlinux file, try the running kernel kallsyms table. | |
1796 | */ | |
9e201442 | 1797 | kallsyms_filename = "/proc/kallsyms"; |
9e201442 | 1798 | } |
439d473b | 1799 | |
cc612d81 | 1800 | do_kallsyms: |
9de89fe7 | 1801 | err = dso__load_kallsyms(self, kallsyms_filename, map, filter); |
3846df2e ACM |
1802 | if (err > 0) |
1803 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
dc8d6ab2 | 1804 | free(kallsyms_allocated_filename); |
439d473b | 1805 | |
dc8d6ab2 | 1806 | out_try_fixup: |
439d473b | 1807 | if (err > 0) { |
cc612d81 | 1808 | out_fixup: |
e1c7c6a4 | 1809 | if (kallsyms_filename != NULL) |
dc8d6ab2 | 1810 | dso__set_long_name(self, strdup("[kernel.kallsyms]")); |
6a4694a4 ACM |
1811 | map__fixup_start(map); |
1812 | map__fixup_end(map); | |
439d473b | 1813 | } |
94cb9e38 | 1814 | |
a827c875 ACM |
1815 | return err; |
1816 | } | |
1817 | ||
a1645ce1 ZY |
1818 | static int dso__load_guest_kernel_sym(struct dso *self, struct map *map, |
1819 | symbol_filter_t filter) | |
1820 | { | |
1821 | int err; | |
1822 | const char *kallsyms_filename = NULL; | |
23346f21 | 1823 | struct machine *machine; |
a1645ce1 ZY |
1824 | char path[PATH_MAX]; |
1825 | ||
1826 | if (!map->groups) { | |
1827 | pr_debug("Guest kernel map hasn't the point to groups\n"); | |
1828 | return -1; | |
1829 | } | |
23346f21 | 1830 | machine = map->groups->machine; |
a1645ce1 | 1831 | |
23346f21 | 1832 | if (machine__is_default_guest(machine)) { |
a1645ce1 ZY |
1833 | /* |
1834 | * if the user specified a vmlinux filename, use it and only | |
1835 | * it, reporting errors to the user if it cannot be used. | |
1836 | * Or use file guest_kallsyms inputted by user on commandline | |
1837 | */ | |
1838 | if (symbol_conf.default_guest_vmlinux_name != NULL) { | |
1839 | err = dso__load_vmlinux(self, map, | |
1840 | symbol_conf.default_guest_vmlinux_name, filter); | |
1841 | goto out_try_fixup; | |
1842 | } | |
1843 | ||
1844 | kallsyms_filename = symbol_conf.default_guest_kallsyms; | |
1845 | if (!kallsyms_filename) | |
1846 | return -1; | |
1847 | } else { | |
23346f21 | 1848 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); |
a1645ce1 ZY |
1849 | kallsyms_filename = path; |
1850 | } | |
1851 | ||
1852 | err = dso__load_kallsyms(self, kallsyms_filename, map, filter); | |
1853 | if (err > 0) | |
1854 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
1855 | ||
1856 | out_try_fixup: | |
1857 | if (err > 0) { | |
1858 | if (kallsyms_filename != NULL) { | |
48ea8f54 | 1859 | machine__mmap_name(machine, path, sizeof(path)); |
23346f21 | 1860 | dso__set_long_name(self, strdup(path)); |
a1645ce1 ZY |
1861 | } |
1862 | map__fixup_start(map); | |
1863 | map__fixup_end(map); | |
1864 | } | |
1865 | ||
1866 | return err; | |
1867 | } | |
cd84c2ac | 1868 | |
b0da954a | 1869 | static void dsos__add(struct list_head *head, struct dso *dso) |
cd84c2ac | 1870 | { |
b0da954a | 1871 | list_add_tail(&dso->node, head); |
cd84c2ac FW |
1872 | } |
1873 | ||
b0da954a | 1874 | static struct dso *dsos__find(struct list_head *head, const char *name) |
cd84c2ac FW |
1875 | { |
1876 | struct dso *pos; | |
1877 | ||
b0da954a | 1878 | list_for_each_entry(pos, head, node) |
cf4e5b08 | 1879 | if (strcmp(pos->long_name, name) == 0) |
cd84c2ac FW |
1880 | return pos; |
1881 | return NULL; | |
1882 | } | |
1883 | ||
a89e5abe | 1884 | struct dso *__dsos__findnew(struct list_head *head, const char *name) |
cd84c2ac | 1885 | { |
a89e5abe | 1886 | struct dso *dso = dsos__find(head, name); |
cd84c2ac | 1887 | |
e4204992 | 1888 | if (!dso) { |
00a192b3 | 1889 | dso = dso__new(name); |
cfc10d3b | 1890 | if (dso != NULL) { |
a89e5abe | 1891 | dsos__add(head, dso); |
cfc10d3b ACM |
1892 | dso__set_basename(dso); |
1893 | } | |
66bd8424 | 1894 | } |
cd84c2ac FW |
1895 | |
1896 | return dso; | |
cd84c2ac FW |
1897 | } |
1898 | ||
b0da954a | 1899 | static void __dsos__fprintf(struct list_head *head, FILE *fp) |
cd84c2ac FW |
1900 | { |
1901 | struct dso *pos; | |
1902 | ||
95011c60 ACM |
1903 | list_for_each_entry(pos, head, node) { |
1904 | int i; | |
1905 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
1906 | dso__fprintf(pos, i, fp); | |
1907 | } | |
cd84c2ac FW |
1908 | } |
1909 | ||
23346f21 | 1910 | void dsos__fprintf(struct rb_root *machines, FILE *fp) |
b0da954a | 1911 | { |
a1645ce1 ZY |
1912 | struct rb_node *nd; |
1913 | ||
23346f21 ACM |
1914 | for (nd = rb_first(machines); nd; nd = rb_next(nd)) { |
1915 | struct machine *pos = rb_entry(nd, struct machine, rb_node); | |
1916 | __dsos__fprintf(&pos->kernel_dsos, fp); | |
1917 | __dsos__fprintf(&pos->user_dsos, fp); | |
a1645ce1 | 1918 | } |
b0da954a ACM |
1919 | } |
1920 | ||
88d3d9b7 ACM |
1921 | static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp, |
1922 | bool with_hits) | |
9e03eb2d ACM |
1923 | { |
1924 | struct dso *pos; | |
1925 | size_t ret = 0; | |
1926 | ||
b0da954a | 1927 | list_for_each_entry(pos, head, node) { |
88d3d9b7 ACM |
1928 | if (with_hits && !pos->hit) |
1929 | continue; | |
9e03eb2d | 1930 | ret += dso__fprintf_buildid(pos, fp); |
1124ba73 | 1931 | ret += fprintf(fp, " %s\n", pos->long_name); |
9e03eb2d ACM |
1932 | } |
1933 | return ret; | |
1934 | } | |
1935 | ||
23346f21 | 1936 | size_t dsos__fprintf_buildid(struct rb_root *machines, FILE *fp, bool with_hits) |
b0da954a | 1937 | { |
a1645ce1 ZY |
1938 | struct rb_node *nd; |
1939 | size_t ret = 0; | |
1940 | ||
23346f21 ACM |
1941 | for (nd = rb_first(machines); nd; nd = rb_next(nd)) { |
1942 | struct machine *pos = rb_entry(nd, struct machine, rb_node); | |
1943 | ret += __dsos__fprintf_buildid(&pos->kernel_dsos, fp, with_hits); | |
1944 | ret += __dsos__fprintf_buildid(&pos->user_dsos, fp, with_hits); | |
a1645ce1 ZY |
1945 | } |
1946 | return ret; | |
b0da954a ACM |
1947 | } |
1948 | ||
fd1d908c ACM |
1949 | struct dso *dso__new_kernel(const char *name) |
1950 | { | |
1951 | struct dso *self = dso__new(name ?: "[kernel.kallsyms]"); | |
1952 | ||
1953 | if (self != NULL) { | |
b63be8d7 | 1954 | dso__set_short_name(self, "[kernel]"); |
a1645ce1 ZY |
1955 | self->kernel = DSO_TYPE_KERNEL; |
1956 | } | |
1957 | ||
1958 | return self; | |
1959 | } | |
1960 | ||
23346f21 | 1961 | static struct dso *dso__new_guest_kernel(struct machine *machine, |
a1645ce1 ZY |
1962 | const char *name) |
1963 | { | |
48ea8f54 ACM |
1964 | char bf[PATH_MAX]; |
1965 | struct dso *self = dso__new(name ?: machine__mmap_name(machine, bf, sizeof(bf))); | |
a1645ce1 | 1966 | |
a1645ce1 ZY |
1967 | if (self != NULL) { |
1968 | dso__set_short_name(self, "[guest.kernel]"); | |
1969 | self->kernel = DSO_TYPE_GUEST_KERNEL; | |
fd1d908c ACM |
1970 | } |
1971 | ||
1972 | return self; | |
1973 | } | |
1974 | ||
23346f21 | 1975 | void dso__read_running_kernel_build_id(struct dso *self, struct machine *machine) |
fd1d908c | 1976 | { |
a1645ce1 ZY |
1977 | char path[PATH_MAX]; |
1978 | ||
23346f21 | 1979 | if (machine__is_default_guest(machine)) |
a1645ce1 | 1980 | return; |
23346f21 | 1981 | sprintf(path, "%s/sys/kernel/notes", machine->root_dir); |
a1645ce1 | 1982 | if (sysfs__read_build_id(path, self->build_id, |
fd1d908c ACM |
1983 | sizeof(self->build_id)) == 0) |
1984 | self->has_build_id = true; | |
1985 | } | |
1986 | ||
23346f21 | 1987 | static struct dso *dsos__create_kernel(struct machine *machine) |
cd84c2ac | 1988 | { |
a1645ce1 ZY |
1989 | const char *vmlinux_name = NULL; |
1990 | struct dso *kernel; | |
cd84c2ac | 1991 | |
23346f21 | 1992 | if (machine__is_host(machine)) { |
a1645ce1 ZY |
1993 | vmlinux_name = symbol_conf.vmlinux_name; |
1994 | kernel = dso__new_kernel(vmlinux_name); | |
1995 | } else { | |
23346f21 | 1996 | if (machine__is_default_guest(machine)) |
a1645ce1 | 1997 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; |
23346f21 | 1998 | kernel = dso__new_guest_kernel(machine, vmlinux_name); |
8d92c02a | 1999 | } |
cd84c2ac | 2000 | |
a1645ce1 | 2001 | if (kernel != NULL) { |
23346f21 ACM |
2002 | dso__read_running_kernel_build_id(kernel, machine); |
2003 | dsos__add(&machine->kernel_dsos, kernel); | |
a1645ce1 | 2004 | } |
f1dfa0b1 | 2005 | return kernel; |
f1dfa0b1 ACM |
2006 | } |
2007 | ||
b7cece76 ACM |
2008 | int __map_groups__create_kernel_maps(struct map_groups *self, |
2009 | struct map *vmlinux_maps[MAP__NR_TYPES], | |
2010 | struct dso *kernel) | |
f1dfa0b1 | 2011 | { |
de176489 | 2012 | enum map_type type; |
f1dfa0b1 | 2013 | |
de176489 | 2014 | for (type = 0; type < MAP__NR_TYPES; ++type) { |
9de89fe7 ACM |
2015 | struct kmap *kmap; |
2016 | ||
de176489 ACM |
2017 | vmlinux_maps[type] = map__new2(0, kernel, type); |
2018 | if (vmlinux_maps[type] == NULL) | |
2019 | return -1; | |
f1dfa0b1 | 2020 | |
de176489 ACM |
2021 | vmlinux_maps[type]->map_ip = |
2022 | vmlinux_maps[type]->unmap_ip = identity__map_ip; | |
9de89fe7 ACM |
2023 | |
2024 | kmap = map__kmap(vmlinux_maps[type]); | |
2025 | kmap->kmaps = self; | |
de176489 | 2026 | map_groups__insert(self, vmlinux_maps[type]); |
f1dfa0b1 ACM |
2027 | } |
2028 | ||
f1dfa0b1 | 2029 | return 0; |
2446042c ACM |
2030 | } |
2031 | ||
cc612d81 ACM |
2032 | static void vmlinux_path__exit(void) |
2033 | { | |
2034 | while (--vmlinux_path__nr_entries >= 0) { | |
2035 | free(vmlinux_path[vmlinux_path__nr_entries]); | |
2036 | vmlinux_path[vmlinux_path__nr_entries] = NULL; | |
2037 | } | |
2038 | ||
2039 | free(vmlinux_path); | |
2040 | vmlinux_path = NULL; | |
2041 | } | |
2042 | ||
2043 | static int vmlinux_path__init(void) | |
2044 | { | |
2045 | struct utsname uts; | |
2046 | char bf[PATH_MAX]; | |
2047 | ||
2048 | if (uname(&uts) < 0) | |
2049 | return -1; | |
2050 | ||
2051 | vmlinux_path = malloc(sizeof(char *) * 5); | |
2052 | if (vmlinux_path == NULL) | |
2053 | return -1; | |
2054 | ||
2055 | vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux"); | |
2056 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2057 | goto out_fail; | |
2058 | ++vmlinux_path__nr_entries; | |
2059 | vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux"); | |
2060 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2061 | goto out_fail; | |
2062 | ++vmlinux_path__nr_entries; | |
2063 | snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", uts.release); | |
2064 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2065 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2066 | goto out_fail; | |
2067 | ++vmlinux_path__nr_entries; | |
2068 | snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", uts.release); | |
2069 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2070 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2071 | goto out_fail; | |
2072 | ++vmlinux_path__nr_entries; | |
2073 | snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux", | |
2074 | uts.release); | |
2075 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2076 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2077 | goto out_fail; | |
2078 | ++vmlinux_path__nr_entries; | |
2079 | ||
2080 | return 0; | |
2081 | ||
2082 | out_fail: | |
2083 | vmlinux_path__exit(); | |
2084 | return -1; | |
2085 | } | |
2086 | ||
b0a9ab62 ACM |
2087 | size_t vmlinux_path__fprintf(FILE *fp) |
2088 | { | |
2089 | int i; | |
2090 | size_t printed = 0; | |
2091 | ||
2092 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
2093 | printed += fprintf(fp, "[%d] %s\n", i, vmlinux_path[i]); | |
2094 | ||
2095 | return printed; | |
2096 | } | |
2097 | ||
655000e7 ACM |
2098 | static int setup_list(struct strlist **list, const char *list_str, |
2099 | const char *list_name) | |
2100 | { | |
2101 | if (list_str == NULL) | |
2102 | return 0; | |
2103 | ||
2104 | *list = strlist__new(true, list_str); | |
2105 | if (!*list) { | |
2106 | pr_err("problems parsing %s list\n", list_name); | |
2107 | return -1; | |
2108 | } | |
2109 | return 0; | |
2110 | } | |
2111 | ||
75be6cf4 | 2112 | int symbol__init(void) |
2446042c | 2113 | { |
95011c60 | 2114 | elf_version(EV_CURRENT); |
75be6cf4 ACM |
2115 | if (symbol_conf.sort_by_name) |
2116 | symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - | |
2117 | sizeof(struct symbol)); | |
b32d133a | 2118 | |
75be6cf4 | 2119 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init() < 0) |
2446042c ACM |
2120 | return -1; |
2121 | ||
c410a338 ACM |
2122 | if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { |
2123 | pr_err("'.' is the only non valid --field-separator argument\n"); | |
2124 | return -1; | |
2125 | } | |
2126 | ||
655000e7 ACM |
2127 | if (setup_list(&symbol_conf.dso_list, |
2128 | symbol_conf.dso_list_str, "dso") < 0) | |
2129 | return -1; | |
2130 | ||
2131 | if (setup_list(&symbol_conf.comm_list, | |
2132 | symbol_conf.comm_list_str, "comm") < 0) | |
2133 | goto out_free_dso_list; | |
2134 | ||
2135 | if (setup_list(&symbol_conf.sym_list, | |
2136 | symbol_conf.sym_list_str, "symbol") < 0) | |
2137 | goto out_free_comm_list; | |
2138 | ||
4aa65636 | 2139 | return 0; |
655000e7 ACM |
2140 | |
2141 | out_free_dso_list: | |
2142 | strlist__delete(symbol_conf.dso_list); | |
2143 | out_free_comm_list: | |
2144 | strlist__delete(symbol_conf.comm_list); | |
2145 | return -1; | |
4aa65636 ACM |
2146 | } |
2147 | ||
23346f21 | 2148 | int map_groups__create_kernel_maps(struct rb_root *machines, pid_t pid) |
4aa65636 | 2149 | { |
a1645ce1 | 2150 | struct dso *kernel; |
23346f21 | 2151 | struct machine *machine = machines__findnew(machines, pid); |
9de89fe7 | 2152 | |
23346f21 | 2153 | if (machine == NULL) |
a1645ce1 | 2154 | return -1; |
23346f21 | 2155 | kernel = dsos__create_kernel(machine); |
9de89fe7 ACM |
2156 | if (kernel == NULL) |
2157 | return -1; | |
2158 | ||
23346f21 ACM |
2159 | if (__map_groups__create_kernel_maps(&machine->kmaps, |
2160 | machine->vmlinux_maps, kernel) < 0) | |
cc612d81 | 2161 | return -1; |
cc612d81 | 2162 | |
a1645ce1 | 2163 | if (symbol_conf.use_modules && |
23346f21 | 2164 | map_groups__create_modules(machine) < 0) |
10fe12ef | 2165 | pr_debug("Problems creating module maps, continuing anyway...\n"); |
90c83218 ACM |
2166 | /* |
2167 | * Now that we have all the maps created, just set the ->end of them: | |
2168 | */ | |
23346f21 | 2169 | map_groups__fixup_end(&machine->kmaps); |
6671cb16 | 2170 | return 0; |
cd84c2ac | 2171 | } |
5aab621b ACM |
2172 | |
2173 | static int hex(char ch) | |
2174 | { | |
2175 | if ((ch >= '0') && (ch <= '9')) | |
2176 | return ch - '0'; | |
2177 | if ((ch >= 'a') && (ch <= 'f')) | |
2178 | return ch - 'a' + 10; | |
2179 | if ((ch >= 'A') && (ch <= 'F')) | |
2180 | return ch - 'A' + 10; | |
2181 | return -1; | |
2182 | } | |
2183 | ||
2184 | /* | |
2185 | * While we find nice hex chars, build a long_val. | |
2186 | * Return number of chars processed. | |
2187 | */ | |
2188 | int hex2u64(const char *ptr, u64 *long_val) | |
2189 | { | |
2190 | const char *p = ptr; | |
2191 | *long_val = 0; | |
2192 | ||
2193 | while (*p) { | |
2194 | const int hex_val = hex(*p); | |
2195 | ||
2196 | if (hex_val < 0) | |
2197 | break; | |
2198 | ||
2199 | *long_val = (*long_val << 4) | hex_val; | |
2200 | p++; | |
2201 | } | |
2202 | ||
2203 | return p - ptr; | |
2204 | } | |
2205 | ||
2206 | char *strxfrchar(char *s, char from, char to) | |
2207 | { | |
2208 | char *p = s; | |
2209 | ||
2210 | while ((p = strchr(p, from)) != NULL) | |
2211 | *p++ = to; | |
2212 | ||
2213 | return s; | |
2214 | } | |
a1645ce1 | 2215 | |
23346f21 | 2216 | int map_groups__create_guest_kernel_maps(struct rb_root *machines) |
a1645ce1 ZY |
2217 | { |
2218 | int ret = 0; | |
2219 | struct dirent **namelist = NULL; | |
2220 | int i, items = 0; | |
2221 | char path[PATH_MAX]; | |
2222 | pid_t pid; | |
2223 | ||
2224 | if (symbol_conf.default_guest_vmlinux_name || | |
2225 | symbol_conf.default_guest_modules || | |
2226 | symbol_conf.default_guest_kallsyms) { | |
23346f21 | 2227 | map_groups__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID); |
a1645ce1 ZY |
2228 | } |
2229 | ||
2230 | if (symbol_conf.guestmount) { | |
2231 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
2232 | if (items <= 0) | |
2233 | return -ENOENT; | |
2234 | for (i = 0; i < items; i++) { | |
2235 | if (!isdigit(namelist[i]->d_name[0])) { | |
2236 | /* Filter out . and .. */ | |
2237 | continue; | |
2238 | } | |
2239 | pid = atoi(namelist[i]->d_name); | |
2240 | sprintf(path, "%s/%s/proc/kallsyms", | |
2241 | symbol_conf.guestmount, | |
2242 | namelist[i]->d_name); | |
2243 | ret = access(path, R_OK); | |
2244 | if (ret) { | |
2245 | pr_debug("Can't access file %s\n", path); | |
2246 | goto failure; | |
2247 | } | |
23346f21 | 2248 | map_groups__create_kernel_maps(machines, pid); |
a1645ce1 ZY |
2249 | } |
2250 | failure: | |
2251 | free(namelist); | |
2252 | } | |
2253 | ||
2254 | return ret; | |
2255 | } |