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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; |
a2928c42 ACM |
192 | } |
193 | ||
194 | return self; | |
195 | } | |
196 | ||
fcf1203a | 197 | static void symbols__delete(struct rb_root *self) |
a2928c42 ACM |
198 | { |
199 | struct symbol *pos; | |
fcf1203a | 200 | struct rb_node *next = rb_first(self); |
a2928c42 ACM |
201 | |
202 | while (next) { | |
203 | pos = rb_entry(next, struct symbol, rb_node); | |
204 | next = rb_next(&pos->rb_node); | |
fcf1203a | 205 | rb_erase(&pos->rb_node, self); |
00a192b3 | 206 | symbol__delete(pos); |
a2928c42 ACM |
207 | } |
208 | } | |
209 | ||
210 | void dso__delete(struct dso *self) | |
211 | { | |
6a4694a4 ACM |
212 | int i; |
213 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
214 | symbols__delete(&self->symbols[i]); | |
439d473b ACM |
215 | if (self->long_name != self->name) |
216 | free(self->long_name); | |
a2928c42 ACM |
217 | free(self); |
218 | } | |
219 | ||
8d06367f ACM |
220 | void dso__set_build_id(struct dso *self, void *build_id) |
221 | { | |
222 | memcpy(self->build_id, build_id, sizeof(self->build_id)); | |
223 | self->has_build_id = 1; | |
224 | } | |
225 | ||
fcf1203a | 226 | static void symbols__insert(struct rb_root *self, struct symbol *sym) |
a2928c42 | 227 | { |
fcf1203a | 228 | struct rb_node **p = &self->rb_node; |
a2928c42 | 229 | struct rb_node *parent = NULL; |
9cffa8d5 | 230 | const u64 ip = sym->start; |
a2928c42 ACM |
231 | struct symbol *s; |
232 | ||
233 | while (*p != NULL) { | |
234 | parent = *p; | |
235 | s = rb_entry(parent, struct symbol, rb_node); | |
236 | if (ip < s->start) | |
237 | p = &(*p)->rb_left; | |
238 | else | |
239 | p = &(*p)->rb_right; | |
240 | } | |
241 | rb_link_node(&sym->rb_node, parent, p); | |
fcf1203a | 242 | rb_insert_color(&sym->rb_node, self); |
a2928c42 ACM |
243 | } |
244 | ||
fcf1203a | 245 | static struct symbol *symbols__find(struct rb_root *self, u64 ip) |
a2928c42 ACM |
246 | { |
247 | struct rb_node *n; | |
248 | ||
249 | if (self == NULL) | |
250 | return NULL; | |
251 | ||
fcf1203a | 252 | n = self->rb_node; |
a2928c42 ACM |
253 | |
254 | while (n) { | |
255 | struct symbol *s = rb_entry(n, struct symbol, rb_node); | |
256 | ||
257 | if (ip < s->start) | |
258 | n = n->rb_left; | |
259 | else if (ip > s->end) | |
260 | n = n->rb_right; | |
261 | else | |
262 | return s; | |
263 | } | |
264 | ||
265 | return NULL; | |
266 | } | |
267 | ||
79406cd7 ACM |
268 | struct symbol_name_rb_node { |
269 | struct rb_node rb_node; | |
270 | struct symbol sym; | |
271 | }; | |
272 | ||
273 | static void symbols__insert_by_name(struct rb_root *self, struct symbol *sym) | |
274 | { | |
275 | struct rb_node **p = &self->rb_node; | |
276 | struct rb_node *parent = NULL; | |
277 | struct symbol_name_rb_node *symn = ((void *)sym) - sizeof(*parent), *s; | |
278 | ||
279 | while (*p != NULL) { | |
280 | parent = *p; | |
281 | s = rb_entry(parent, struct symbol_name_rb_node, rb_node); | |
282 | if (strcmp(sym->name, s->sym.name) < 0) | |
283 | p = &(*p)->rb_left; | |
284 | else | |
285 | p = &(*p)->rb_right; | |
286 | } | |
287 | rb_link_node(&symn->rb_node, parent, p); | |
288 | rb_insert_color(&symn->rb_node, self); | |
289 | } | |
290 | ||
291 | static void symbols__sort_by_name(struct rb_root *self, struct rb_root *source) | |
292 | { | |
293 | struct rb_node *nd; | |
294 | ||
295 | for (nd = rb_first(source); nd; nd = rb_next(nd)) { | |
296 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
297 | symbols__insert_by_name(self, pos); | |
298 | } | |
299 | } | |
300 | ||
301 | static struct symbol *symbols__find_by_name(struct rb_root *self, const char *name) | |
302 | { | |
303 | struct rb_node *n; | |
304 | ||
305 | if (self == NULL) | |
306 | return NULL; | |
307 | ||
308 | n = self->rb_node; | |
309 | ||
310 | while (n) { | |
311 | struct symbol_name_rb_node *s; | |
312 | int cmp; | |
313 | ||
314 | s = rb_entry(n, struct symbol_name_rb_node, rb_node); | |
315 | cmp = strcmp(name, s->sym.name); | |
316 | ||
317 | if (cmp < 0) | |
318 | n = n->rb_left; | |
319 | else if (cmp > 0) | |
320 | n = n->rb_right; | |
321 | else | |
322 | return &s->sym; | |
323 | } | |
324 | ||
325 | return NULL; | |
326 | } | |
327 | ||
328 | struct symbol *dso__find_symbol(struct dso *self, | |
329 | enum map_type type, u64 addr) | |
fcf1203a | 330 | { |
6a4694a4 | 331 | return symbols__find(&self->symbols[type], addr); |
fcf1203a ACM |
332 | } |
333 | ||
79406cd7 ACM |
334 | struct symbol *dso__find_symbol_by_name(struct dso *self, enum map_type type, |
335 | const char *name) | |
336 | { | |
337 | return symbols__find_by_name(&self->symbol_names[type], name); | |
338 | } | |
339 | ||
340 | void dso__sort_by_name(struct dso *self, enum map_type type) | |
341 | { | |
342 | dso__set_sorted_by_name(self, type); | |
343 | return symbols__sort_by_name(&self->symbol_names[type], | |
344 | &self->symbols[type]); | |
345 | } | |
346 | ||
ef12a141 | 347 | int build_id__sprintf(const u8 *self, int len, char *bf) |
a2928c42 | 348 | { |
8d06367f | 349 | char *bid = bf; |
ef12a141 | 350 | const u8 *raw = self; |
8d06367f | 351 | int i; |
a2928c42 | 352 | |
8d06367f ACM |
353 | for (i = 0; i < len; ++i) { |
354 | sprintf(bid, "%02x", *raw); | |
355 | ++raw; | |
356 | bid += 2; | |
357 | } | |
358 | ||
359 | return raw - self; | |
360 | } | |
361 | ||
9e03eb2d | 362 | size_t dso__fprintf_buildid(struct dso *self, FILE *fp) |
8d06367f ACM |
363 | { |
364 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
8d06367f ACM |
365 | |
366 | build_id__sprintf(self->build_id, sizeof(self->build_id), sbuild_id); | |
9e03eb2d ACM |
367 | return fprintf(fp, "%s", sbuild_id); |
368 | } | |
369 | ||
95011c60 | 370 | size_t dso__fprintf(struct dso *self, enum map_type type, FILE *fp) |
9e03eb2d ACM |
371 | { |
372 | struct rb_node *nd; | |
373 | size_t ret = fprintf(fp, "dso: %s (", self->short_name); | |
374 | ||
3846df2e ACM |
375 | if (self->short_name != self->long_name) |
376 | ret += fprintf(fp, "%s, ", self->long_name); | |
377 | ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type], | |
378 | self->loaded ? "" : "NOT "); | |
9e03eb2d | 379 | ret += dso__fprintf_buildid(self, fp); |
6a4694a4 | 380 | ret += fprintf(fp, ")\n"); |
95011c60 ACM |
381 | for (nd = rb_first(&self->symbols[type]); nd; nd = rb_next(nd)) { |
382 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
383 | ret += symbol__fprintf(pos, fp); | |
a2928c42 ACM |
384 | } |
385 | ||
386 | return ret; | |
387 | } | |
388 | ||
9e201442 ACM |
389 | int kallsyms__parse(const char *filename, void *arg, |
390 | int (*process_symbol)(void *arg, const char *name, | |
682b335a | 391 | char type, u64 start)) |
a2928c42 | 392 | { |
a2928c42 ACM |
393 | char *line = NULL; |
394 | size_t n; | |
682b335a | 395 | int err = 0; |
9e201442 | 396 | FILE *file = fopen(filename, "r"); |
a2928c42 ACM |
397 | |
398 | if (file == NULL) | |
399 | goto out_failure; | |
400 | ||
401 | while (!feof(file)) { | |
9cffa8d5 | 402 | u64 start; |
a2928c42 ACM |
403 | int line_len, len; |
404 | char symbol_type; | |
2e538c4a | 405 | char *symbol_name; |
a2928c42 ACM |
406 | |
407 | line_len = getline(&line, &n, file); | |
a1645ce1 | 408 | if (line_len < 0 || !line) |
a2928c42 ACM |
409 | break; |
410 | ||
a2928c42 ACM |
411 | line[--line_len] = '\0'; /* \n */ |
412 | ||
a0055ae2 | 413 | len = hex2u64(line, &start); |
a2928c42 ACM |
414 | |
415 | len++; | |
416 | if (len + 2 >= line_len) | |
417 | continue; | |
418 | ||
419 | symbol_type = toupper(line[len]); | |
af427bf5 | 420 | symbol_name = line + len + 2; |
682b335a ACM |
421 | |
422 | err = process_symbol(arg, symbol_name, symbol_type, start); | |
423 | if (err) | |
424 | break; | |
2e538c4a ACM |
425 | } |
426 | ||
427 | free(line); | |
428 | fclose(file); | |
682b335a | 429 | return err; |
2e538c4a | 430 | |
2e538c4a ACM |
431 | out_failure: |
432 | return -1; | |
433 | } | |
434 | ||
682b335a ACM |
435 | struct process_kallsyms_args { |
436 | struct map *map; | |
437 | struct dso *dso; | |
438 | }; | |
439 | ||
440 | static int map__process_kallsym_symbol(void *arg, const char *name, | |
441 | char type, u64 start) | |
442 | { | |
443 | struct symbol *sym; | |
444 | struct process_kallsyms_args *a = arg; | |
445 | struct rb_root *root = &a->dso->symbols[a->map->type]; | |
446 | ||
447 | if (!symbol_type__is_a(type, a->map->type)) | |
448 | return 0; | |
449 | ||
450 | /* | |
451 | * Will fix up the end later, when we have all symbols sorted. | |
452 | */ | |
453 | sym = symbol__new(start, 0, name); | |
454 | ||
455 | if (sym == NULL) | |
456 | return -ENOMEM; | |
457 | /* | |
458 | * We will pass the symbols to the filter later, in | |
459 | * map__split_kallsyms, when we have split the maps per module | |
460 | */ | |
461 | symbols__insert(root, sym); | |
a1645ce1 | 462 | |
682b335a ACM |
463 | return 0; |
464 | } | |
465 | ||
466 | /* | |
467 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
468 | * so that we can in the next step set the symbol ->end address and then | |
469 | * call kernel_maps__split_kallsyms. | |
470 | */ | |
9e201442 ACM |
471 | static int dso__load_all_kallsyms(struct dso *self, const char *filename, |
472 | struct map *map) | |
682b335a ACM |
473 | { |
474 | struct process_kallsyms_args args = { .map = map, .dso = self, }; | |
9e201442 | 475 | return kallsyms__parse(filename, &args, map__process_kallsym_symbol); |
682b335a ACM |
476 | } |
477 | ||
2e538c4a ACM |
478 | /* |
479 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
480 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
481 | * the original ELF section names vmlinux have. | |
482 | */ | |
9958e1f0 | 483 | static int dso__split_kallsyms(struct dso *self, struct map *map, |
9de89fe7 | 484 | symbol_filter_t filter) |
2e538c4a | 485 | { |
9de89fe7 | 486 | struct map_groups *kmaps = map__kmap(map)->kmaps; |
a1645ce1 | 487 | struct kernel_info *kerninfo = kmaps->this_kerninfo; |
4e06255f | 488 | struct map *curr_map = map; |
2e538c4a ACM |
489 | struct symbol *pos; |
490 | int count = 0; | |
4e06255f ACM |
491 | struct rb_root *root = &self->symbols[map->type]; |
492 | struct rb_node *next = rb_first(root); | |
2e538c4a ACM |
493 | int kernel_range = 0; |
494 | ||
495 | while (next) { | |
496 | char *module; | |
497 | ||
498 | pos = rb_entry(next, struct symbol, rb_node); | |
499 | next = rb_next(&pos->rb_node); | |
500 | ||
501 | module = strchr(pos->name, '\t'); | |
502 | if (module) { | |
75be6cf4 | 503 | if (!symbol_conf.use_modules) |
1de8e245 ACM |
504 | goto discard_symbol; |
505 | ||
2e538c4a ACM |
506 | *module++ = '\0'; |
507 | ||
b7cece76 | 508 | if (strcmp(curr_map->dso->short_name, module)) { |
a1645ce1 ZY |
509 | if (curr_map != map && |
510 | self->kernel == DSO_TYPE_GUEST_KERNEL && | |
511 | is_default_guest(kerninfo)) { | |
512 | /* | |
513 | * We assume all symbols of a module are | |
514 | * continuous in * kallsyms, so curr_map | |
515 | * points to a module and all its | |
516 | * symbols are in its kmap. Mark it as | |
517 | * loaded. | |
518 | */ | |
519 | dso__set_loaded(curr_map->dso, | |
520 | curr_map->type); | |
521 | } | |
522 | ||
523 | curr_map = map_groups__find_by_name(kmaps, | |
524 | map->type, module); | |
4e06255f | 525 | if (curr_map == NULL) { |
a1645ce1 | 526 | pr_err("%s/proc/{kallsyms,modules} " |
b7cece76 | 527 | "inconsistency while looking " |
a1645ce1 ZY |
528 | "for \"%s\" module!\n", |
529 | kerninfo->root_dir, module); | |
530 | curr_map = map; | |
531 | goto discard_symbol; | |
af427bf5 | 532 | } |
b7cece76 | 533 | |
a1645ce1 ZY |
534 | if (curr_map->dso->loaded && |
535 | !is_default_guest(kmaps->this_kerninfo)) | |
b7cece76 | 536 | goto discard_symbol; |
af427bf5 | 537 | } |
2e538c4a ACM |
538 | /* |
539 | * So that we look just like we get from .ko files, | |
540 | * i.e. not prelinked, relative to map->start. | |
541 | */ | |
4e06255f ACM |
542 | pos->start = curr_map->map_ip(curr_map, pos->start); |
543 | pos->end = curr_map->map_ip(curr_map, pos->end); | |
544 | } else if (curr_map != map) { | |
2e538c4a ACM |
545 | char dso_name[PATH_MAX]; |
546 | struct dso *dso; | |
547 | ||
a1645ce1 ZY |
548 | if (self->kernel == DSO_TYPE_GUEST_KERNEL) |
549 | snprintf(dso_name, sizeof(dso_name), | |
550 | "[guest.kernel].%d", | |
551 | kernel_range++); | |
552 | else | |
553 | snprintf(dso_name, sizeof(dso_name), | |
554 | "[kernel].%d", | |
555 | kernel_range++); | |
2e538c4a | 556 | |
00a192b3 | 557 | dso = dso__new(dso_name); |
2e538c4a ACM |
558 | if (dso == NULL) |
559 | return -1; | |
560 | ||
a1645ce1 ZY |
561 | dso->kernel = self->kernel; |
562 | ||
4e06255f | 563 | curr_map = map__new2(pos->start, dso, map->type); |
37fe5fcb | 564 | if (curr_map == NULL) { |
2e538c4a ACM |
565 | dso__delete(dso); |
566 | return -1; | |
567 | } | |
a2928c42 | 568 | |
4e06255f | 569 | curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; |
9de89fe7 | 570 | map_groups__insert(kmaps, curr_map); |
2e538c4a ACM |
571 | ++kernel_range; |
572 | } | |
a2928c42 | 573 | |
4e06255f | 574 | if (filter && filter(curr_map, pos)) { |
1de8e245 | 575 | discard_symbol: rb_erase(&pos->rb_node, root); |
00a192b3 | 576 | symbol__delete(pos); |
2e538c4a | 577 | } else { |
4e06255f ACM |
578 | if (curr_map != map) { |
579 | rb_erase(&pos->rb_node, root); | |
580 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
2e538c4a | 581 | } |
9974f496 MG |
582 | count++; |
583 | } | |
a2928c42 ACM |
584 | } |
585 | ||
a1645ce1 ZY |
586 | if (curr_map != map && |
587 | self->kernel == DSO_TYPE_GUEST_KERNEL && | |
588 | is_default_guest(kmaps->this_kerninfo)) { | |
589 | dso__set_loaded(curr_map->dso, curr_map->type); | |
590 | } | |
591 | ||
9974f496 | 592 | return count; |
2e538c4a | 593 | } |
a2928c42 | 594 | |
9de89fe7 ACM |
595 | int dso__load_kallsyms(struct dso *self, const char *filename, |
596 | struct map *map, symbol_filter_t filter) | |
2e538c4a | 597 | { |
9e201442 | 598 | if (dso__load_all_kallsyms(self, filename, map) < 0) |
2e538c4a ACM |
599 | return -1; |
600 | ||
4e06255f | 601 | symbols__fixup_end(&self->symbols[map->type]); |
a1645ce1 ZY |
602 | if (self->kernel == DSO_TYPE_GUEST_KERNEL) |
603 | self->origin = DSO__ORIG_GUEST_KERNEL; | |
604 | else | |
605 | self->origin = DSO__ORIG_KERNEL; | |
2e538c4a | 606 | |
9de89fe7 | 607 | return dso__split_kallsyms(self, map, filter); |
af427bf5 ACM |
608 | } |
609 | ||
439d473b | 610 | static int dso__load_perf_map(struct dso *self, struct map *map, |
6beba7ad | 611 | symbol_filter_t filter) |
80d496be PE |
612 | { |
613 | char *line = NULL; | |
614 | size_t n; | |
615 | FILE *file; | |
616 | int nr_syms = 0; | |
617 | ||
439d473b | 618 | file = fopen(self->long_name, "r"); |
80d496be PE |
619 | if (file == NULL) |
620 | goto out_failure; | |
621 | ||
622 | while (!feof(file)) { | |
9cffa8d5 | 623 | u64 start, size; |
80d496be PE |
624 | struct symbol *sym; |
625 | int line_len, len; | |
626 | ||
627 | line_len = getline(&line, &n, file); | |
628 | if (line_len < 0) | |
629 | break; | |
630 | ||
631 | if (!line) | |
632 | goto out_failure; | |
633 | ||
634 | line[--line_len] = '\0'; /* \n */ | |
635 | ||
636 | len = hex2u64(line, &start); | |
637 | ||
638 | len++; | |
639 | if (len + 2 >= line_len) | |
640 | continue; | |
641 | ||
642 | len += hex2u64(line + len, &size); | |
643 | ||
644 | len++; | |
645 | if (len + 2 >= line_len) | |
646 | continue; | |
647 | ||
00a192b3 | 648 | sym = symbol__new(start, size, line + len); |
80d496be PE |
649 | |
650 | if (sym == NULL) | |
651 | goto out_delete_line; | |
652 | ||
439d473b | 653 | if (filter && filter(map, sym)) |
00a192b3 | 654 | symbol__delete(sym); |
80d496be | 655 | else { |
6a4694a4 | 656 | symbols__insert(&self->symbols[map->type], sym); |
80d496be PE |
657 | nr_syms++; |
658 | } | |
659 | } | |
660 | ||
661 | free(line); | |
662 | fclose(file); | |
663 | ||
664 | return nr_syms; | |
665 | ||
666 | out_delete_line: | |
667 | free(line); | |
668 | out_failure: | |
669 | return -1; | |
670 | } | |
671 | ||
a2928c42 ACM |
672 | /** |
673 | * elf_symtab__for_each_symbol - iterate thru all the symbols | |
674 | * | |
675 | * @self: struct elf_symtab instance to iterate | |
83a0944f | 676 | * @idx: uint32_t idx |
a2928c42 ACM |
677 | * @sym: GElf_Sym iterator |
678 | */ | |
83a0944f IM |
679 | #define elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) \ |
680 | for (idx = 0, gelf_getsym(syms, idx, &sym);\ | |
681 | idx < nr_syms; \ | |
682 | idx++, gelf_getsym(syms, idx, &sym)) | |
a2928c42 ACM |
683 | |
684 | static inline uint8_t elf_sym__type(const GElf_Sym *sym) | |
685 | { | |
686 | return GELF_ST_TYPE(sym->st_info); | |
687 | } | |
688 | ||
689 | static inline int elf_sym__is_function(const GElf_Sym *sym) | |
690 | { | |
691 | return elf_sym__type(sym) == STT_FUNC && | |
692 | sym->st_name != 0 && | |
81833130 | 693 | sym->st_shndx != SHN_UNDEF; |
a2928c42 ACM |
694 | } |
695 | ||
f1dfa0b1 ACM |
696 | static inline bool elf_sym__is_object(const GElf_Sym *sym) |
697 | { | |
698 | return elf_sym__type(sym) == STT_OBJECT && | |
699 | sym->st_name != 0 && | |
700 | sym->st_shndx != SHN_UNDEF; | |
701 | } | |
702 | ||
6cfcc53e MG |
703 | static inline int elf_sym__is_label(const GElf_Sym *sym) |
704 | { | |
705 | return elf_sym__type(sym) == STT_NOTYPE && | |
706 | sym->st_name != 0 && | |
707 | sym->st_shndx != SHN_UNDEF && | |
708 | sym->st_shndx != SHN_ABS; | |
709 | } | |
710 | ||
711 | static inline const char *elf_sec__name(const GElf_Shdr *shdr, | |
712 | const Elf_Data *secstrs) | |
713 | { | |
714 | return secstrs->d_buf + shdr->sh_name; | |
715 | } | |
716 | ||
717 | static inline int elf_sec__is_text(const GElf_Shdr *shdr, | |
718 | const Elf_Data *secstrs) | |
719 | { | |
720 | return strstr(elf_sec__name(shdr, secstrs), "text") != NULL; | |
721 | } | |
722 | ||
f1dfa0b1 ACM |
723 | static inline bool elf_sec__is_data(const GElf_Shdr *shdr, |
724 | const Elf_Data *secstrs) | |
725 | { | |
726 | return strstr(elf_sec__name(shdr, secstrs), "data") != NULL; | |
727 | } | |
728 | ||
a2928c42 ACM |
729 | static inline const char *elf_sym__name(const GElf_Sym *sym, |
730 | const Elf_Data *symstrs) | |
731 | { | |
732 | return symstrs->d_buf + sym->st_name; | |
733 | } | |
734 | ||
735 | static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, | |
736 | GElf_Shdr *shp, const char *name, | |
83a0944f | 737 | size_t *idx) |
a2928c42 ACM |
738 | { |
739 | Elf_Scn *sec = NULL; | |
740 | size_t cnt = 1; | |
741 | ||
742 | while ((sec = elf_nextscn(elf, sec)) != NULL) { | |
743 | char *str; | |
744 | ||
745 | gelf_getshdr(sec, shp); | |
746 | str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name); | |
747 | if (!strcmp(name, str)) { | |
83a0944f IM |
748 | if (idx) |
749 | *idx = cnt; | |
a2928c42 ACM |
750 | break; |
751 | } | |
752 | ++cnt; | |
753 | } | |
754 | ||
755 | return sec; | |
756 | } | |
757 | ||
8ce998d6 ACM |
758 | #define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \ |
759 | for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \ | |
760 | idx < nr_entries; \ | |
761 | ++idx, pos = gelf_getrel(reldata, idx, &pos_mem)) | |
762 | ||
763 | #define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \ | |
764 | for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \ | |
765 | idx < nr_entries; \ | |
766 | ++idx, pos = gelf_getrela(reldata, idx, &pos_mem)) | |
767 | ||
a25e46c4 ACM |
768 | /* |
769 | * We need to check if we have a .dynsym, so that we can handle the | |
770 | * .plt, synthesizing its symbols, that aren't on the symtabs (be it | |
771 | * .dynsym or .symtab). | |
772 | * And always look at the original dso, not at debuginfo packages, that | |
773 | * have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS). | |
774 | */ | |
82164161 ACM |
775 | static int dso__synthesize_plt_symbols(struct dso *self, struct map *map, |
776 | symbol_filter_t filter) | |
8ce998d6 ACM |
777 | { |
778 | uint32_t nr_rel_entries, idx; | |
779 | GElf_Sym sym; | |
9cffa8d5 | 780 | u64 plt_offset; |
8ce998d6 ACM |
781 | GElf_Shdr shdr_plt; |
782 | struct symbol *f; | |
a25e46c4 | 783 | GElf_Shdr shdr_rel_plt, shdr_dynsym; |
8ce998d6 | 784 | Elf_Data *reldata, *syms, *symstrs; |
a25e46c4 ACM |
785 | Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym; |
786 | size_t dynsym_idx; | |
787 | GElf_Ehdr ehdr; | |
8ce998d6 | 788 | char sympltname[1024]; |
a25e46c4 ACM |
789 | Elf *elf; |
790 | int nr = 0, symidx, fd, err = 0; | |
791 | ||
439d473b | 792 | fd = open(self->long_name, O_RDONLY); |
a25e46c4 ACM |
793 | if (fd < 0) |
794 | goto out; | |
795 | ||
84087126 | 796 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a25e46c4 ACM |
797 | if (elf == NULL) |
798 | goto out_close; | |
799 | ||
800 | if (gelf_getehdr(elf, &ehdr) == NULL) | |
801 | goto out_elf_end; | |
802 | ||
803 | scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym, | |
804 | ".dynsym", &dynsym_idx); | |
805 | if (scn_dynsym == NULL) | |
806 | goto out_elf_end; | |
8ce998d6 | 807 | |
a25e46c4 | 808 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
809 | ".rela.plt", NULL); |
810 | if (scn_plt_rel == NULL) { | |
a25e46c4 | 811 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
812 | ".rel.plt", NULL); |
813 | if (scn_plt_rel == NULL) | |
a25e46c4 | 814 | goto out_elf_end; |
8ce998d6 ACM |
815 | } |
816 | ||
a25e46c4 ACM |
817 | err = -1; |
818 | ||
8ce998d6 | 819 | if (shdr_rel_plt.sh_link != dynsym_idx) |
a25e46c4 | 820 | goto out_elf_end; |
8ce998d6 | 821 | |
a25e46c4 ACM |
822 | if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL) |
823 | goto out_elf_end; | |
8ce998d6 ACM |
824 | |
825 | /* | |
83a0944f | 826 | * Fetch the relocation section to find the idxes to the GOT |
8ce998d6 ACM |
827 | * and the symbols in the .dynsym they refer to. |
828 | */ | |
829 | reldata = elf_getdata(scn_plt_rel, NULL); | |
830 | if (reldata == NULL) | |
a25e46c4 | 831 | goto out_elf_end; |
8ce998d6 ACM |
832 | |
833 | syms = elf_getdata(scn_dynsym, NULL); | |
834 | if (syms == NULL) | |
a25e46c4 | 835 | goto out_elf_end; |
8ce998d6 | 836 | |
a25e46c4 | 837 | scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link); |
8ce998d6 | 838 | if (scn_symstrs == NULL) |
a25e46c4 | 839 | goto out_elf_end; |
8ce998d6 ACM |
840 | |
841 | symstrs = elf_getdata(scn_symstrs, NULL); | |
842 | if (symstrs == NULL) | |
a25e46c4 | 843 | goto out_elf_end; |
8ce998d6 ACM |
844 | |
845 | nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize; | |
846 | plt_offset = shdr_plt.sh_offset; | |
847 | ||
848 | if (shdr_rel_plt.sh_type == SHT_RELA) { | |
849 | GElf_Rela pos_mem, *pos; | |
850 | ||
851 | elf_section__for_each_rela(reldata, pos, pos_mem, idx, | |
852 | nr_rel_entries) { | |
853 | symidx = GELF_R_SYM(pos->r_info); | |
854 | plt_offset += shdr_plt.sh_entsize; | |
855 | gelf_getsym(syms, symidx, &sym); | |
856 | snprintf(sympltname, sizeof(sympltname), | |
857 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
858 | ||
859 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
00a192b3 | 860 | sympltname); |
8ce998d6 | 861 | if (!f) |
a25e46c4 | 862 | goto out_elf_end; |
8ce998d6 | 863 | |
82164161 ACM |
864 | if (filter && filter(map, f)) |
865 | symbol__delete(f); | |
866 | else { | |
6a4694a4 | 867 | symbols__insert(&self->symbols[map->type], f); |
82164161 ACM |
868 | ++nr; |
869 | } | |
8ce998d6 ACM |
870 | } |
871 | } else if (shdr_rel_plt.sh_type == SHT_REL) { | |
872 | GElf_Rel pos_mem, *pos; | |
873 | elf_section__for_each_rel(reldata, pos, pos_mem, idx, | |
874 | nr_rel_entries) { | |
875 | symidx = GELF_R_SYM(pos->r_info); | |
876 | plt_offset += shdr_plt.sh_entsize; | |
877 | gelf_getsym(syms, symidx, &sym); | |
878 | snprintf(sympltname, sizeof(sympltname), | |
879 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
880 | ||
881 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
00a192b3 | 882 | sympltname); |
8ce998d6 | 883 | if (!f) |
a25e46c4 | 884 | goto out_elf_end; |
8ce998d6 | 885 | |
82164161 ACM |
886 | if (filter && filter(map, f)) |
887 | symbol__delete(f); | |
888 | else { | |
6a4694a4 | 889 | symbols__insert(&self->symbols[map->type], f); |
82164161 ACM |
890 | ++nr; |
891 | } | |
8ce998d6 | 892 | } |
8ce998d6 ACM |
893 | } |
894 | ||
a25e46c4 ACM |
895 | err = 0; |
896 | out_elf_end: | |
897 | elf_end(elf); | |
898 | out_close: | |
899 | close(fd); | |
900 | ||
901 | if (err == 0) | |
902 | return nr; | |
903 | out: | |
fe2197b8 ACM |
904 | pr_debug("%s: problems reading %s PLT info.\n", |
905 | __func__, self->long_name); | |
a25e46c4 | 906 | return 0; |
8ce998d6 ACM |
907 | } |
908 | ||
d45868d3 ACM |
909 | static bool elf_sym__is_a(GElf_Sym *self, enum map_type type) |
910 | { | |
911 | switch (type) { | |
912 | case MAP__FUNCTION: | |
913 | return elf_sym__is_function(self); | |
f1dfa0b1 ACM |
914 | case MAP__VARIABLE: |
915 | return elf_sym__is_object(self); | |
d45868d3 ACM |
916 | default: |
917 | return false; | |
918 | } | |
919 | } | |
920 | ||
921 | static bool elf_sec__is_a(GElf_Shdr *self, Elf_Data *secstrs, enum map_type type) | |
922 | { | |
923 | switch (type) { | |
924 | case MAP__FUNCTION: | |
925 | return elf_sec__is_text(self, secstrs); | |
f1dfa0b1 ACM |
926 | case MAP__VARIABLE: |
927 | return elf_sec__is_data(self, secstrs); | |
d45868d3 ACM |
928 | default: |
929 | return false; | |
930 | } | |
931 | } | |
932 | ||
9de89fe7 ACM |
933 | static int dso__load_sym(struct dso *self, struct map *map, const char *name, |
934 | int fd, symbol_filter_t filter, int kmodule) | |
a2928c42 | 935 | { |
9de89fe7 | 936 | struct kmap *kmap = self->kernel ? map__kmap(map) : NULL; |
2e538c4a ACM |
937 | struct map *curr_map = map; |
938 | struct dso *curr_dso = self; | |
6cfcc53e | 939 | Elf_Data *symstrs, *secstrs; |
a2928c42 ACM |
940 | uint32_t nr_syms; |
941 | int err = -1; | |
83a0944f | 942 | uint32_t idx; |
a2928c42 ACM |
943 | GElf_Ehdr ehdr; |
944 | GElf_Shdr shdr; | |
945 | Elf_Data *syms; | |
946 | GElf_Sym sym; | |
a25e46c4 | 947 | Elf_Scn *sec, *sec_strndx; |
a2928c42 | 948 | Elf *elf; |
439d473b | 949 | int nr = 0; |
a2928c42 | 950 | |
84087126 | 951 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a2928c42 | 952 | if (elf == NULL) { |
6beba7ad | 953 | pr_err("%s: cannot read %s ELF file.\n", __func__, name); |
a2928c42 ACM |
954 | goto out_close; |
955 | } | |
956 | ||
957 | if (gelf_getehdr(elf, &ehdr) == NULL) { | |
6beba7ad | 958 | pr_err("%s: cannot get elf header.\n", __func__); |
a2928c42 ACM |
959 | goto out_elf_end; |
960 | } | |
961 | ||
962 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL); | |
8ce998d6 | 963 | if (sec == NULL) { |
a25e46c4 ACM |
964 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL); |
965 | if (sec == NULL) | |
8ce998d6 | 966 | goto out_elf_end; |
8ce998d6 | 967 | } |
a2928c42 ACM |
968 | |
969 | syms = elf_getdata(sec, NULL); | |
970 | if (syms == NULL) | |
971 | goto out_elf_end; | |
972 | ||
973 | sec = elf_getscn(elf, shdr.sh_link); | |
974 | if (sec == NULL) | |
975 | goto out_elf_end; | |
976 | ||
977 | symstrs = elf_getdata(sec, NULL); | |
978 | if (symstrs == NULL) | |
979 | goto out_elf_end; | |
980 | ||
6cfcc53e MG |
981 | sec_strndx = elf_getscn(elf, ehdr.e_shstrndx); |
982 | if (sec_strndx == NULL) | |
983 | goto out_elf_end; | |
984 | ||
985 | secstrs = elf_getdata(sec_strndx, NULL); | |
9b30a26b | 986 | if (secstrs == NULL) |
6cfcc53e MG |
987 | goto out_elf_end; |
988 | ||
a2928c42 ACM |
989 | nr_syms = shdr.sh_size / shdr.sh_entsize; |
990 | ||
e9fbc9dc | 991 | memset(&sym, 0, sizeof(sym)); |
a1645ce1 | 992 | if (self->kernel == DSO_TYPE_USER) { |
d20ff6bd | 993 | self->adjust_symbols = (ehdr.e_type == ET_EXEC || |
30d7a77d ACM |
994 | elf_section_by_name(elf, &ehdr, &shdr, |
995 | ".gnu.prelink_undo", | |
996 | NULL) != NULL); | |
d20ff6bd MG |
997 | } else self->adjust_symbols = 0; |
998 | ||
83a0944f | 999 | elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) { |
a2928c42 | 1000 | struct symbol *f; |
56b03f3c | 1001 | const char *elf_name = elf_sym__name(&sym, symstrs); |
2e538c4a | 1002 | char *demangled = NULL; |
6cfcc53e MG |
1003 | int is_label = elf_sym__is_label(&sym); |
1004 | const char *section_name; | |
a2928c42 | 1005 | |
9de89fe7 ACM |
1006 | if (kmap && kmap->ref_reloc_sym && kmap->ref_reloc_sym->name && |
1007 | strcmp(elf_name, kmap->ref_reloc_sym->name) == 0) | |
1008 | kmap->ref_reloc_sym->unrelocated_addr = sym.st_value; | |
56b03f3c | 1009 | |
d45868d3 | 1010 | if (!is_label && !elf_sym__is_a(&sym, map->type)) |
a2928c42 ACM |
1011 | continue; |
1012 | ||
1013 | sec = elf_getscn(elf, sym.st_shndx); | |
1014 | if (!sec) | |
1015 | goto out_elf_end; | |
1016 | ||
1017 | gelf_getshdr(sec, &shdr); | |
6cfcc53e | 1018 | |
d45868d3 | 1019 | if (is_label && !elf_sec__is_a(&shdr, secstrs, map->type)) |
6cfcc53e MG |
1020 | continue; |
1021 | ||
1022 | section_name = elf_sec__name(&shdr, secstrs); | |
0b73da3f | 1023 | |
a1645ce1 | 1024 | if (self->kernel != DSO_TYPE_USER || kmodule) { |
2e538c4a ACM |
1025 | char dso_name[PATH_MAX]; |
1026 | ||
1027 | if (strcmp(section_name, | |
b63be8d7 ACM |
1028 | (curr_dso->short_name + |
1029 | self->short_name_len)) == 0) | |
2e538c4a ACM |
1030 | goto new_symbol; |
1031 | ||
1032 | if (strcmp(section_name, ".text") == 0) { | |
1033 | curr_map = map; | |
1034 | curr_dso = self; | |
1035 | goto new_symbol; | |
1036 | } | |
1037 | ||
1038 | snprintf(dso_name, sizeof(dso_name), | |
1039 | "%s%s", self->short_name, section_name); | |
1040 | ||
9de89fe7 | 1041 | curr_map = map_groups__find_by_name(kmap->kmaps, map->type, dso_name); |
2e538c4a ACM |
1042 | if (curr_map == NULL) { |
1043 | u64 start = sym.st_value; | |
1044 | ||
1045 | if (kmodule) | |
1046 | start += map->start + shdr.sh_offset; | |
1047 | ||
00a192b3 | 1048 | curr_dso = dso__new(dso_name); |
2e538c4a ACM |
1049 | if (curr_dso == NULL) |
1050 | goto out_elf_end; | |
a1645ce1 | 1051 | curr_dso->kernel = self->kernel; |
3610583c | 1052 | curr_map = map__new2(start, curr_dso, |
6275ce2d | 1053 | map->type); |
2e538c4a ACM |
1054 | if (curr_map == NULL) { |
1055 | dso__delete(curr_dso); | |
1056 | goto out_elf_end; | |
1057 | } | |
ed52ce2e ACM |
1058 | curr_map->map_ip = identity__map_ip; |
1059 | curr_map->unmap_ip = identity__map_ip; | |
b0a9ab62 | 1060 | curr_dso->origin = self->origin; |
9de89fe7 | 1061 | map_groups__insert(kmap->kmaps, curr_map); |
a1645ce1 | 1062 | dsos__add(&self->node, curr_dso); |
6275ce2d | 1063 | dso__set_loaded(curr_dso, map->type); |
2e538c4a ACM |
1064 | } else |
1065 | curr_dso = curr_map->dso; | |
1066 | ||
1067 | goto new_symbol; | |
af427bf5 ACM |
1068 | } |
1069 | ||
2e538c4a | 1070 | if (curr_dso->adjust_symbols) { |
29a9f66d ACM |
1071 | pr_debug4("%s: adjusting symbol: st_value: %#Lx " |
1072 | "sh_addr: %#Lx sh_offset: %#Lx\n", __func__, | |
1073 | (u64)sym.st_value, (u64)shdr.sh_addr, | |
1074 | (u64)shdr.sh_offset); | |
f5812a7a | 1075 | sym.st_value -= shdr.sh_addr - shdr.sh_offset; |
af427bf5 | 1076 | } |
28ac909b ACM |
1077 | /* |
1078 | * We need to figure out if the object was created from C++ sources | |
1079 | * DWARF DW_compile_unit has this, but we don't always have access | |
1080 | * to it... | |
1081 | */ | |
83a0944f | 1082 | demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI); |
28ac909b | 1083 | if (demangled != NULL) |
83a0944f | 1084 | elf_name = demangled; |
2e538c4a | 1085 | new_symbol: |
00a192b3 | 1086 | f = symbol__new(sym.st_value, sym.st_size, elf_name); |
28ac909b | 1087 | free(demangled); |
a2928c42 ACM |
1088 | if (!f) |
1089 | goto out_elf_end; | |
1090 | ||
2e538c4a | 1091 | if (filter && filter(curr_map, f)) |
00a192b3 | 1092 | symbol__delete(f); |
69ee69f6 | 1093 | else { |
6a4694a4 | 1094 | symbols__insert(&curr_dso->symbols[curr_map->type], f); |
69ee69f6 ACM |
1095 | nr++; |
1096 | } | |
a2928c42 ACM |
1097 | } |
1098 | ||
2e538c4a ACM |
1099 | /* |
1100 | * For misannotated, zeroed, ASM function sizes. | |
1101 | */ | |
6275ce2d | 1102 | if (nr > 0) { |
6a4694a4 | 1103 | symbols__fixup_end(&self->symbols[map->type]); |
6275ce2d ACM |
1104 | if (kmap) { |
1105 | /* | |
1106 | * We need to fixup this here too because we create new | |
1107 | * maps here, for things like vsyscall sections. | |
1108 | */ | |
1109 | __map_groups__fixup_end(kmap->kmaps, map->type); | |
1110 | } | |
1111 | } | |
a2928c42 ACM |
1112 | err = nr; |
1113 | out_elf_end: | |
1114 | elf_end(elf); | |
1115 | out_close: | |
1116 | return err; | |
1117 | } | |
1118 | ||
78075caa ACM |
1119 | static bool dso__build_id_equal(const struct dso *self, u8 *build_id) |
1120 | { | |
1121 | return memcmp(self->build_id, build_id, sizeof(self->build_id)) == 0; | |
1122 | } | |
1123 | ||
a1645ce1 | 1124 | bool __dsos__read_build_ids(struct list_head *head, bool with_hits) |
57f395a7 | 1125 | { |
e30a3d12 | 1126 | bool have_build_id = false; |
57f395a7 FW |
1127 | struct dso *pos; |
1128 | ||
6122e4e4 ACM |
1129 | list_for_each_entry(pos, head, node) { |
1130 | if (with_hits && !pos->hit) | |
1131 | continue; | |
e30a3d12 ACM |
1132 | if (filename__read_build_id(pos->long_name, pos->build_id, |
1133 | sizeof(pos->build_id)) > 0) { | |
1134 | have_build_id = true; | |
1135 | pos->has_build_id = true; | |
1136 | } | |
6122e4e4 | 1137 | } |
57f395a7 | 1138 | |
e30a3d12 | 1139 | return have_build_id; |
57f395a7 FW |
1140 | } |
1141 | ||
fd7a346e ACM |
1142 | /* |
1143 | * Align offset to 4 bytes as needed for note name and descriptor data. | |
1144 | */ | |
1145 | #define NOTE_ALIGN(n) (((n) + 3) & -4U) | |
1146 | ||
2643ce11 | 1147 | int filename__read_build_id(const char *filename, void *bf, size_t size) |
4d1e00a8 | 1148 | { |
2643ce11 | 1149 | int fd, err = -1; |
4d1e00a8 ACM |
1150 | GElf_Ehdr ehdr; |
1151 | GElf_Shdr shdr; | |
fd7a346e | 1152 | Elf_Data *data; |
4d1e00a8 | 1153 | Elf_Scn *sec; |
e57cfcda | 1154 | Elf_Kind ek; |
fd7a346e | 1155 | void *ptr; |
4d1e00a8 | 1156 | Elf *elf; |
4d1e00a8 | 1157 | |
2643ce11 ACM |
1158 | if (size < BUILD_ID_SIZE) |
1159 | goto out; | |
1160 | ||
1161 | fd = open(filename, O_RDONLY); | |
4d1e00a8 ACM |
1162 | if (fd < 0) |
1163 | goto out; | |
1164 | ||
84087126 | 1165 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
4d1e00a8 | 1166 | if (elf == NULL) { |
8d06367f | 1167 | pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename); |
4d1e00a8 ACM |
1168 | goto out_close; |
1169 | } | |
1170 | ||
e57cfcda PE |
1171 | ek = elf_kind(elf); |
1172 | if (ek != ELF_K_ELF) | |
1173 | goto out_elf_end; | |
1174 | ||
4d1e00a8 | 1175 | if (gelf_getehdr(elf, &ehdr) == NULL) { |
6beba7ad | 1176 | pr_err("%s: cannot get elf header.\n", __func__); |
4d1e00a8 ACM |
1177 | goto out_elf_end; |
1178 | } | |
1179 | ||
2643ce11 ACM |
1180 | sec = elf_section_by_name(elf, &ehdr, &shdr, |
1181 | ".note.gnu.build-id", NULL); | |
fd7a346e ACM |
1182 | if (sec == NULL) { |
1183 | sec = elf_section_by_name(elf, &ehdr, &shdr, | |
1184 | ".notes", NULL); | |
1185 | if (sec == NULL) | |
1186 | goto out_elf_end; | |
1187 | } | |
4d1e00a8 | 1188 | |
fd7a346e ACM |
1189 | data = elf_getdata(sec, NULL); |
1190 | if (data == NULL) | |
4d1e00a8 | 1191 | goto out_elf_end; |
fd7a346e ACM |
1192 | |
1193 | ptr = data->d_buf; | |
1194 | while (ptr < (data->d_buf + data->d_size)) { | |
1195 | GElf_Nhdr *nhdr = ptr; | |
1196 | int namesz = NOTE_ALIGN(nhdr->n_namesz), | |
1197 | descsz = NOTE_ALIGN(nhdr->n_descsz); | |
1198 | const char *name; | |
1199 | ||
1200 | ptr += sizeof(*nhdr); | |
1201 | name = ptr; | |
1202 | ptr += namesz; | |
1203 | if (nhdr->n_type == NT_GNU_BUILD_ID && | |
1204 | nhdr->n_namesz == sizeof("GNU")) { | |
1205 | if (memcmp(name, "GNU", sizeof("GNU")) == 0) { | |
1206 | memcpy(bf, ptr, BUILD_ID_SIZE); | |
1207 | err = BUILD_ID_SIZE; | |
1208 | break; | |
1209 | } | |
1210 | } | |
1211 | ptr += descsz; | |
1212 | } | |
2643ce11 ACM |
1213 | out_elf_end: |
1214 | elf_end(elf); | |
1215 | out_close: | |
1216 | close(fd); | |
1217 | out: | |
1218 | return err; | |
1219 | } | |
1220 | ||
f1617b40 ACM |
1221 | int sysfs__read_build_id(const char *filename, void *build_id, size_t size) |
1222 | { | |
1223 | int fd, err = -1; | |
1224 | ||
1225 | if (size < BUILD_ID_SIZE) | |
1226 | goto out; | |
1227 | ||
1228 | fd = open(filename, O_RDONLY); | |
1229 | if (fd < 0) | |
1230 | goto out; | |
1231 | ||
1232 | while (1) { | |
1233 | char bf[BUFSIZ]; | |
1234 | GElf_Nhdr nhdr; | |
1235 | int namesz, descsz; | |
1236 | ||
1237 | if (read(fd, &nhdr, sizeof(nhdr)) != sizeof(nhdr)) | |
1238 | break; | |
1239 | ||
fd7a346e ACM |
1240 | namesz = NOTE_ALIGN(nhdr.n_namesz); |
1241 | descsz = NOTE_ALIGN(nhdr.n_descsz); | |
f1617b40 ACM |
1242 | if (nhdr.n_type == NT_GNU_BUILD_ID && |
1243 | nhdr.n_namesz == sizeof("GNU")) { | |
1244 | if (read(fd, bf, namesz) != namesz) | |
1245 | break; | |
1246 | if (memcmp(bf, "GNU", sizeof("GNU")) == 0) { | |
1247 | if (read(fd, build_id, | |
1248 | BUILD_ID_SIZE) == BUILD_ID_SIZE) { | |
1249 | err = 0; | |
1250 | break; | |
1251 | } | |
1252 | } else if (read(fd, bf, descsz) != descsz) | |
1253 | break; | |
1254 | } else { | |
1255 | int n = namesz + descsz; | |
1256 | if (read(fd, bf, n) != n) | |
1257 | break; | |
1258 | } | |
1259 | } | |
1260 | close(fd); | |
1261 | out: | |
1262 | return err; | |
1263 | } | |
1264 | ||
94cb9e38 ACM |
1265 | char dso__symtab_origin(const struct dso *self) |
1266 | { | |
1267 | static const char origin[] = { | |
1268 | [DSO__ORIG_KERNEL] = 'k', | |
1269 | [DSO__ORIG_JAVA_JIT] = 'j', | |
4cf40131 | 1270 | [DSO__ORIG_BUILD_ID_CACHE] = 'B', |
94cb9e38 ACM |
1271 | [DSO__ORIG_FEDORA] = 'f', |
1272 | [DSO__ORIG_UBUNTU] = 'u', | |
1273 | [DSO__ORIG_BUILDID] = 'b', | |
1274 | [DSO__ORIG_DSO] = 'd', | |
439d473b | 1275 | [DSO__ORIG_KMODULE] = 'K', |
a1645ce1 ZY |
1276 | [DSO__ORIG_GUEST_KERNEL] = 'g', |
1277 | [DSO__ORIG_GUEST_KMODULE] = 'G', | |
94cb9e38 ACM |
1278 | }; |
1279 | ||
1280 | if (self == NULL || self->origin == DSO__ORIG_NOT_FOUND) | |
1281 | return '!'; | |
1282 | return origin[self->origin]; | |
1283 | } | |
1284 | ||
9de89fe7 | 1285 | int dso__load(struct dso *self, struct map *map, symbol_filter_t filter) |
a2928c42 | 1286 | { |
4d1e00a8 | 1287 | int size = PATH_MAX; |
c338aee8 | 1288 | char *name; |
d3379ab9 | 1289 | u8 build_id[BUILD_ID_SIZE]; |
4cf40131 | 1290 | char build_id_hex[BUILD_ID_SIZE * 2 + 1]; |
a2928c42 ACM |
1291 | int ret = -1; |
1292 | int fd; | |
a1645ce1 ZY |
1293 | struct kernel_info *kerninfo; |
1294 | const char *root_dir; | |
a2928c42 | 1295 | |
3610583c | 1296 | dso__set_loaded(self, map->type); |
66bd8424 | 1297 | |
a1645ce1 | 1298 | if (self->kernel == DSO_TYPE_KERNEL) |
9de89fe7 | 1299 | return dso__load_kernel_sym(self, map, filter); |
a1645ce1 ZY |
1300 | else if (self->kernel == DSO_TYPE_GUEST_KERNEL) |
1301 | return dso__load_guest_kernel_sym(self, map, filter); | |
1302 | ||
1303 | if (map->groups && map->groups->this_kerninfo) | |
1304 | kerninfo = map->groups->this_kerninfo; | |
1305 | else | |
1306 | kerninfo = NULL; | |
c338aee8 ACM |
1307 | |
1308 | name = malloc(size); | |
a2928c42 ACM |
1309 | if (!name) |
1310 | return -1; | |
1311 | ||
30d7a77d | 1312 | self->adjust_symbols = 0; |
f5812a7a | 1313 | |
94cb9e38 | 1314 | if (strncmp(self->name, "/tmp/perf-", 10) == 0) { |
6beba7ad | 1315 | ret = dso__load_perf_map(self, map, filter); |
94cb9e38 ACM |
1316 | self->origin = ret > 0 ? DSO__ORIG_JAVA_JIT : |
1317 | DSO__ORIG_NOT_FOUND; | |
1318 | return ret; | |
1319 | } | |
1320 | ||
4cf40131 | 1321 | self->origin = DSO__ORIG_BUILD_ID_CACHE; |
80d496be | 1322 | |
4cf40131 ACM |
1323 | if (self->has_build_id) { |
1324 | build_id__sprintf(self->build_id, sizeof(self->build_id), | |
1325 | build_id_hex); | |
1326 | snprintf(name, size, "%s/%s/.build-id/%.2s/%s", | |
1327 | getenv("HOME"), DEBUG_CACHE_DIR, | |
1328 | build_id_hex, build_id_hex + 2); | |
1329 | goto open_file; | |
1330 | } | |
a2928c42 ACM |
1331 | more: |
1332 | do { | |
94cb9e38 ACM |
1333 | self->origin++; |
1334 | switch (self->origin) { | |
1335 | case DSO__ORIG_FEDORA: | |
439d473b ACM |
1336 | snprintf(name, size, "/usr/lib/debug%s.debug", |
1337 | self->long_name); | |
a2928c42 | 1338 | break; |
94cb9e38 | 1339 | case DSO__ORIG_UBUNTU: |
439d473b ACM |
1340 | snprintf(name, size, "/usr/lib/debug%s", |
1341 | self->long_name); | |
a2928c42 | 1342 | break; |
94cb9e38 | 1343 | case DSO__ORIG_BUILDID: |
d3379ab9 ACM |
1344 | if (filename__read_build_id(self->long_name, build_id, |
1345 | sizeof(build_id))) { | |
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 ZY |
1360 | case DSO__ORIG_GUEST_KMODULE: |
1361 | if (map->groups && map->groups->this_kerninfo) | |
1362 | root_dir = map->groups->this_kerninfo->root_dir; | |
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 | ||
1530 | static int map_groups__set_modules_path(struct map_groups *self, | |
1531 | const char *root_dir) | |
1532 | { | |
1533 | char *version; | |
439d473b | 1534 | char modules_path[PATH_MAX]; |
6cfcc53e | 1535 | |
a1645ce1 ZY |
1536 | version = get_kernel_version(root_dir); |
1537 | if (!version) | |
439d473b | 1538 | return -1; |
6cfcc53e | 1539 | |
a1645ce1 ZY |
1540 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s/kernel", |
1541 | root_dir, version); | |
1542 | free(version); | |
6cfcc53e | 1543 | |
9de89fe7 | 1544 | return map_groups__set_modules_path_dir(self, modules_path); |
6cfcc53e MG |
1545 | } |
1546 | ||
439d473b ACM |
1547 | /* |
1548 | * Constructor variant for modules (where we know from /proc/modules where | |
1549 | * they are loaded) and for vmlinux, where only after we load all the | |
1550 | * symbols we'll know where it starts and ends. | |
1551 | */ | |
3610583c | 1552 | static struct map *map__new2(u64 start, struct dso *dso, enum map_type type) |
6cfcc53e | 1553 | { |
5aab621b ACM |
1554 | struct map *self = calloc(1, (sizeof(*self) + |
1555 | (dso->kernel ? sizeof(struct kmap) : 0))); | |
439d473b | 1556 | if (self != NULL) { |
439d473b | 1557 | /* |
afb7b4f0 | 1558 | * ->end will be filled after we load all the symbols |
439d473b | 1559 | */ |
3610583c | 1560 | map__init(self, type, start, 0, 0, dso); |
439d473b | 1561 | } |
afb7b4f0 | 1562 | |
439d473b ACM |
1563 | return self; |
1564 | } | |
1565 | ||
9de89fe7 | 1566 | struct map *map_groups__new_module(struct map_groups *self, u64 start, |
a1645ce1 ZY |
1567 | const char *filename, |
1568 | struct kernel_info *kerninfo) | |
b7cece76 ACM |
1569 | { |
1570 | struct map *map; | |
a1645ce1 | 1571 | struct dso *dso; |
b7cece76 | 1572 | |
a1645ce1 | 1573 | dso = __dsos__findnew(&kerninfo->dsos__kernel, filename); |
b7cece76 ACM |
1574 | if (dso == NULL) |
1575 | return NULL; | |
1576 | ||
1577 | map = map__new2(start, dso, MAP__FUNCTION); | |
1578 | if (map == NULL) | |
1579 | return NULL; | |
1580 | ||
a1645ce1 ZY |
1581 | if (is_host_kernel(kerninfo)) |
1582 | dso->origin = DSO__ORIG_KMODULE; | |
1583 | else | |
1584 | dso->origin = DSO__ORIG_GUEST_KMODULE; | |
9de89fe7 | 1585 | map_groups__insert(self, map); |
b7cece76 ACM |
1586 | return map; |
1587 | } | |
1588 | ||
a1645ce1 | 1589 | static int map_groups__create_modules(struct kernel_info *kerninfo) |
439d473b ACM |
1590 | { |
1591 | char *line = NULL; | |
1592 | size_t n; | |
a1645ce1 | 1593 | FILE *file; |
439d473b | 1594 | struct map *map; |
a1645ce1 ZY |
1595 | const char *root_dir; |
1596 | const char *modules; | |
1597 | char path[PATH_MAX]; | |
1598 | ||
1599 | if (is_default_guest(kerninfo)) | |
1600 | modules = symbol_conf.default_guest_modules; | |
1601 | else { | |
1602 | sprintf(path, "%s/proc/modules", kerninfo->root_dir); | |
1603 | modules = path; | |
1604 | } | |
6cfcc53e | 1605 | |
a1645ce1 | 1606 | file = fopen(modules, "r"); |
439d473b ACM |
1607 | if (file == NULL) |
1608 | return -1; | |
6cfcc53e | 1609 | |
a1645ce1 ZY |
1610 | root_dir = kerninfo->root_dir; |
1611 | ||
439d473b ACM |
1612 | while (!feof(file)) { |
1613 | char name[PATH_MAX]; | |
1614 | u64 start; | |
439d473b ACM |
1615 | char *sep; |
1616 | int line_len; | |
6cfcc53e | 1617 | |
439d473b ACM |
1618 | line_len = getline(&line, &n, file); |
1619 | if (line_len < 0) | |
1620 | break; | |
1621 | ||
1622 | if (!line) | |
1623 | goto out_failure; | |
1624 | ||
1625 | line[--line_len] = '\0'; /* \n */ | |
1626 | ||
1627 | sep = strrchr(line, 'x'); | |
1628 | if (sep == NULL) | |
1629 | continue; | |
1630 | ||
1631 | hex2u64(sep + 1, &start); | |
1632 | ||
1633 | sep = strchr(line, ' '); | |
1634 | if (sep == NULL) | |
1635 | continue; | |
1636 | ||
1637 | *sep = '\0'; | |
1638 | ||
1639 | snprintf(name, sizeof(name), "[%s]", line); | |
a1645ce1 ZY |
1640 | map = map_groups__new_module(&kerninfo->kmaps, |
1641 | start, name, kerninfo); | |
b7cece76 | 1642 | if (map == NULL) |
439d473b | 1643 | goto out_delete_line; |
a1645ce1 | 1644 | dso__kernel_module_get_build_id(map->dso, root_dir); |
6cfcc53e | 1645 | } |
439d473b ACM |
1646 | |
1647 | free(line); | |
1648 | fclose(file); | |
1649 | ||
a1645ce1 | 1650 | return map_groups__set_modules_path(&kerninfo->kmaps, root_dir); |
439d473b ACM |
1651 | |
1652 | out_delete_line: | |
1653 | free(line); | |
1654 | out_failure: | |
1655 | return -1; | |
6cfcc53e MG |
1656 | } |
1657 | ||
9958e1f0 | 1658 | static int dso__load_vmlinux(struct dso *self, struct map *map, |
6beba7ad | 1659 | const char *vmlinux, symbol_filter_t filter) |
a2928c42 | 1660 | { |
fbd733b8 | 1661 | int err = -1, fd; |
a2928c42 | 1662 | |
fbd733b8 ACM |
1663 | if (self->has_build_id) { |
1664 | u8 build_id[BUILD_ID_SIZE]; | |
1665 | ||
1666 | if (filename__read_build_id(vmlinux, build_id, | |
1667 | sizeof(build_id)) < 0) { | |
1668 | pr_debug("No build_id in %s, ignoring it\n", vmlinux); | |
1669 | return -1; | |
1670 | } | |
1671 | if (!dso__build_id_equal(self, build_id)) { | |
1672 | char expected_build_id[BUILD_ID_SIZE * 2 + 1], | |
1673 | vmlinux_build_id[BUILD_ID_SIZE * 2 + 1]; | |
1674 | ||
1675 | build_id__sprintf(self->build_id, | |
1676 | sizeof(self->build_id), | |
1677 | expected_build_id); | |
1678 | build_id__sprintf(build_id, sizeof(build_id), | |
1679 | vmlinux_build_id); | |
1680 | pr_debug("build_id in %s is %s while expected is %s, " | |
1681 | "ignoring it\n", vmlinux, vmlinux_build_id, | |
1682 | expected_build_id); | |
1683 | return -1; | |
1684 | } | |
1685 | } | |
66bd8424 | 1686 | |
fbd733b8 | 1687 | fd = open(vmlinux, O_RDONLY); |
a2928c42 ACM |
1688 | if (fd < 0) |
1689 | return -1; | |
1690 | ||
3610583c | 1691 | dso__set_loaded(self, map->type); |
9de89fe7 | 1692 | err = dso__load_sym(self, map, vmlinux, fd, filter, 0); |
a2928c42 ACM |
1693 | close(fd); |
1694 | ||
3846df2e ACM |
1695 | if (err > 0) |
1696 | pr_debug("Using %s for symbols\n", vmlinux); | |
1697 | ||
a2928c42 ACM |
1698 | return err; |
1699 | } | |
1700 | ||
a19afe46 | 1701 | int dso__load_vmlinux_path(struct dso *self, struct map *map, |
9de89fe7 | 1702 | symbol_filter_t filter) |
a19afe46 ACM |
1703 | { |
1704 | int i, err = 0; | |
1705 | ||
1706 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", | |
1707 | vmlinux_path__nr_entries); | |
1708 | ||
1709 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { | |
9de89fe7 | 1710 | err = dso__load_vmlinux(self, map, vmlinux_path[i], filter); |
a19afe46 | 1711 | if (err > 0) { |
a19afe46 ACM |
1712 | dso__set_long_name(self, strdup(vmlinux_path[i])); |
1713 | break; | |
1714 | } | |
1715 | } | |
1716 | ||
1717 | return err; | |
1718 | } | |
1719 | ||
c338aee8 | 1720 | static int dso__load_kernel_sym(struct dso *self, struct map *map, |
9de89fe7 | 1721 | symbol_filter_t filter) |
a827c875 | 1722 | { |
cc612d81 | 1723 | int err; |
9e201442 ACM |
1724 | const char *kallsyms_filename = NULL; |
1725 | char *kallsyms_allocated_filename = NULL; | |
dc8d6ab2 ACM |
1726 | /* |
1727 | * Step 1: if the user specified a vmlinux filename, use it and only | |
1728 | * it, reporting errors to the user if it cannot be used. | |
1729 | * | |
1730 | * For instance, try to analyse an ARM perf.data file _without_ a | |
1731 | * build-id, or if the user specifies the wrong path to the right | |
1732 | * vmlinux file, obviously we can't fallback to another vmlinux (a | |
1733 | * x86_86 one, on the machine where analysis is being performed, say), | |
1734 | * or worse, /proc/kallsyms. | |
1735 | * | |
1736 | * If the specified file _has_ a build-id and there is a build-id | |
1737 | * section in the perf.data file, we will still do the expected | |
1738 | * validation in dso__load_vmlinux and will bail out if they don't | |
1739 | * match. | |
1740 | */ | |
1741 | if (symbol_conf.vmlinux_name != NULL) { | |
9de89fe7 | 1742 | err = dso__load_vmlinux(self, map, |
dc8d6ab2 ACM |
1743 | symbol_conf.vmlinux_name, filter); |
1744 | goto out_try_fixup; | |
1745 | } | |
cc612d81 ACM |
1746 | |
1747 | if (vmlinux_path != NULL) { | |
9de89fe7 | 1748 | err = dso__load_vmlinux_path(self, map, filter); |
a19afe46 ACM |
1749 | if (err > 0) |
1750 | goto out_fixup; | |
cc612d81 ACM |
1751 | } |
1752 | ||
b7cece76 ACM |
1753 | /* |
1754 | * Say the kernel DSO was created when processing the build-id header table, | |
1755 | * we have a build-id, so check if it is the same as the running kernel, | |
1756 | * using it if it is. | |
1757 | */ | |
1758 | if (self->has_build_id) { | |
1759 | u8 kallsyms_build_id[BUILD_ID_SIZE]; | |
9e201442 | 1760 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; |
b7cece76 ACM |
1761 | |
1762 | if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id, | |
8d0591f6 | 1763 | sizeof(kallsyms_build_id)) == 0) { |
9e201442 ACM |
1764 | if (dso__build_id_equal(self, kallsyms_build_id)) { |
1765 | kallsyms_filename = "/proc/kallsyms"; | |
8d0591f6 | 1766 | goto do_kallsyms; |
9e201442 | 1767 | } |
8d0591f6 | 1768 | } |
dc8d6ab2 ACM |
1769 | /* |
1770 | * Now look if we have it on the build-id cache in | |
1771 | * $HOME/.debug/[kernel.kallsyms]. | |
1772 | */ | |
9e201442 ACM |
1773 | build_id__sprintf(self->build_id, sizeof(self->build_id), |
1774 | sbuild_id); | |
1775 | ||
1776 | if (asprintf(&kallsyms_allocated_filename, | |
1777 | "%s/.debug/[kernel.kallsyms]/%s", | |
3846df2e ACM |
1778 | getenv("HOME"), sbuild_id) == -1) { |
1779 | pr_err("Not enough memory for kallsyms file lookup\n"); | |
dc8d6ab2 | 1780 | return -1; |
3846df2e | 1781 | } |
dc8d6ab2 | 1782 | |
19fc2ded ACM |
1783 | kallsyms_filename = kallsyms_allocated_filename; |
1784 | ||
dc8d6ab2 | 1785 | if (access(kallsyms_filename, F_OK)) { |
3846df2e ACM |
1786 | pr_err("No kallsyms or vmlinux with build-id %s " |
1787 | "was found\n", sbuild_id); | |
9e201442 | 1788 | free(kallsyms_allocated_filename); |
dc8d6ab2 | 1789 | return -1; |
9e201442 | 1790 | } |
dc8d6ab2 ACM |
1791 | } else { |
1792 | /* | |
1793 | * Last resort, if we don't have a build-id and couldn't find | |
1794 | * any vmlinux file, try the running kernel kallsyms table. | |
1795 | */ | |
9e201442 | 1796 | kallsyms_filename = "/proc/kallsyms"; |
9e201442 | 1797 | } |
439d473b | 1798 | |
cc612d81 | 1799 | do_kallsyms: |
9de89fe7 | 1800 | err = dso__load_kallsyms(self, kallsyms_filename, map, filter); |
3846df2e ACM |
1801 | if (err > 0) |
1802 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
dc8d6ab2 | 1803 | free(kallsyms_allocated_filename); |
439d473b | 1804 | |
dc8d6ab2 | 1805 | out_try_fixup: |
439d473b | 1806 | if (err > 0) { |
cc612d81 | 1807 | out_fixup: |
e1c7c6a4 | 1808 | if (kallsyms_filename != NULL) |
dc8d6ab2 | 1809 | dso__set_long_name(self, strdup("[kernel.kallsyms]")); |
6a4694a4 ACM |
1810 | map__fixup_start(map); |
1811 | map__fixup_end(map); | |
439d473b | 1812 | } |
94cb9e38 | 1813 | |
a827c875 ACM |
1814 | return err; |
1815 | } | |
1816 | ||
a1645ce1 ZY |
1817 | static int dso__load_guest_kernel_sym(struct dso *self, struct map *map, |
1818 | symbol_filter_t filter) | |
1819 | { | |
1820 | int err; | |
1821 | const char *kallsyms_filename = NULL; | |
1822 | struct kernel_info *kerninfo; | |
1823 | char path[PATH_MAX]; | |
1824 | ||
1825 | if (!map->groups) { | |
1826 | pr_debug("Guest kernel map hasn't the point to groups\n"); | |
1827 | return -1; | |
1828 | } | |
1829 | kerninfo = map->groups->this_kerninfo; | |
1830 | ||
1831 | if (is_default_guest(kerninfo)) { | |
1832 | /* | |
1833 | * if the user specified a vmlinux filename, use it and only | |
1834 | * it, reporting errors to the user if it cannot be used. | |
1835 | * Or use file guest_kallsyms inputted by user on commandline | |
1836 | */ | |
1837 | if (symbol_conf.default_guest_vmlinux_name != NULL) { | |
1838 | err = dso__load_vmlinux(self, map, | |
1839 | symbol_conf.default_guest_vmlinux_name, filter); | |
1840 | goto out_try_fixup; | |
1841 | } | |
1842 | ||
1843 | kallsyms_filename = symbol_conf.default_guest_kallsyms; | |
1844 | if (!kallsyms_filename) | |
1845 | return -1; | |
1846 | } else { | |
1847 | sprintf(path, "%s/proc/kallsyms", kerninfo->root_dir); | |
1848 | kallsyms_filename = path; | |
1849 | } | |
1850 | ||
1851 | err = dso__load_kallsyms(self, kallsyms_filename, map, filter); | |
1852 | if (err > 0) | |
1853 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
1854 | ||
1855 | out_try_fixup: | |
1856 | if (err > 0) { | |
1857 | if (kallsyms_filename != NULL) { | |
1858 | kern_mmap_name(kerninfo, path); | |
1859 | dso__set_long_name(self, | |
1860 | strdup(path)); | |
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 | ||
a1645ce1 | 1910 | void dsos__fprintf(struct rb_root *kerninfo_root, FILE *fp) |
b0da954a | 1911 | { |
a1645ce1 ZY |
1912 | struct rb_node *nd; |
1913 | ||
1914 | for (nd = rb_first(kerninfo_root); nd; nd = rb_next(nd)) { | |
1915 | struct kernel_info *pos = rb_entry(nd, struct kernel_info, | |
1916 | rb_node); | |
1917 | __dsos__fprintf(&pos->dsos__kernel, fp); | |
1918 | __dsos__fprintf(&pos->dsos__user, fp); | |
1919 | } | |
b0da954a ACM |
1920 | } |
1921 | ||
88d3d9b7 ACM |
1922 | static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp, |
1923 | bool with_hits) | |
9e03eb2d ACM |
1924 | { |
1925 | struct dso *pos; | |
1926 | size_t ret = 0; | |
1927 | ||
b0da954a | 1928 | list_for_each_entry(pos, head, node) { |
88d3d9b7 ACM |
1929 | if (with_hits && !pos->hit) |
1930 | continue; | |
9e03eb2d | 1931 | ret += dso__fprintf_buildid(pos, fp); |
1124ba73 | 1932 | ret += fprintf(fp, " %s\n", pos->long_name); |
9e03eb2d ACM |
1933 | } |
1934 | return ret; | |
1935 | } | |
1936 | ||
a1645ce1 ZY |
1937 | size_t dsos__fprintf_buildid(struct rb_root *kerninfo_root, |
1938 | FILE *fp, bool with_hits) | |
b0da954a | 1939 | { |
a1645ce1 ZY |
1940 | struct rb_node *nd; |
1941 | size_t ret = 0; | |
1942 | ||
1943 | for (nd = rb_first(kerninfo_root); nd; nd = rb_next(nd)) { | |
1944 | struct kernel_info *pos = rb_entry(nd, struct kernel_info, | |
1945 | rb_node); | |
1946 | ret += __dsos__fprintf_buildid(&pos->dsos__kernel, | |
1947 | fp, with_hits); | |
1948 | ret += __dsos__fprintf_buildid(&pos->dsos__user, | |
1949 | fp, with_hits); | |
1950 | } | |
1951 | return ret; | |
b0da954a ACM |
1952 | } |
1953 | ||
fd1d908c ACM |
1954 | struct dso *dso__new_kernel(const char *name) |
1955 | { | |
1956 | struct dso *self = dso__new(name ?: "[kernel.kallsyms]"); | |
1957 | ||
1958 | if (self != NULL) { | |
b63be8d7 | 1959 | dso__set_short_name(self, "[kernel]"); |
a1645ce1 ZY |
1960 | self->kernel = DSO_TYPE_KERNEL; |
1961 | } | |
1962 | ||
1963 | return self; | |
1964 | } | |
1965 | ||
1966 | static struct dso *dso__new_guest_kernel(struct kernel_info *kerninfo, | |
1967 | const char *name) | |
1968 | { | |
1969 | char buff[PATH_MAX]; | |
1970 | struct dso *self; | |
1971 | ||
1972 | kern_mmap_name(kerninfo, buff); | |
1973 | self = dso__new(name ?: buff); | |
1974 | if (self != NULL) { | |
1975 | dso__set_short_name(self, "[guest.kernel]"); | |
1976 | self->kernel = DSO_TYPE_GUEST_KERNEL; | |
fd1d908c ACM |
1977 | } |
1978 | ||
1979 | return self; | |
1980 | } | |
1981 | ||
a1645ce1 ZY |
1982 | void dso__read_running_kernel_build_id(struct dso *self, |
1983 | struct kernel_info *kerninfo) | |
fd1d908c | 1984 | { |
a1645ce1 ZY |
1985 | char path[PATH_MAX]; |
1986 | ||
1987 | if (is_default_guest(kerninfo)) | |
1988 | return; | |
1989 | sprintf(path, "%s/sys/kernel/notes", kerninfo->root_dir); | |
1990 | if (sysfs__read_build_id(path, self->build_id, | |
fd1d908c ACM |
1991 | sizeof(self->build_id)) == 0) |
1992 | self->has_build_id = true; | |
1993 | } | |
1994 | ||
a1645ce1 | 1995 | static struct dso *dsos__create_kernel(struct kernel_info *kerninfo) |
cd84c2ac | 1996 | { |
a1645ce1 ZY |
1997 | const char *vmlinux_name = NULL; |
1998 | struct dso *kernel; | |
cd84c2ac | 1999 | |
a1645ce1 ZY |
2000 | if (is_host_kernel(kerninfo)) { |
2001 | vmlinux_name = symbol_conf.vmlinux_name; | |
2002 | kernel = dso__new_kernel(vmlinux_name); | |
2003 | } else { | |
2004 | if (is_default_guest(kerninfo)) | |
2005 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; | |
2006 | kernel = dso__new_guest_kernel(kerninfo, vmlinux_name); | |
8d92c02a | 2007 | } |
cd84c2ac | 2008 | |
a1645ce1 ZY |
2009 | if (kernel != NULL) { |
2010 | dso__read_running_kernel_build_id(kernel, kerninfo); | |
2011 | dsos__add(&kerninfo->dsos__kernel, kernel); | |
2012 | } | |
f1dfa0b1 | 2013 | return kernel; |
f1dfa0b1 ACM |
2014 | } |
2015 | ||
b7cece76 ACM |
2016 | int __map_groups__create_kernel_maps(struct map_groups *self, |
2017 | struct map *vmlinux_maps[MAP__NR_TYPES], | |
2018 | struct dso *kernel) | |
f1dfa0b1 | 2019 | { |
de176489 | 2020 | enum map_type type; |
f1dfa0b1 | 2021 | |
de176489 | 2022 | for (type = 0; type < MAP__NR_TYPES; ++type) { |
9de89fe7 ACM |
2023 | struct kmap *kmap; |
2024 | ||
de176489 ACM |
2025 | vmlinux_maps[type] = map__new2(0, kernel, type); |
2026 | if (vmlinux_maps[type] == NULL) | |
2027 | return -1; | |
f1dfa0b1 | 2028 | |
de176489 ACM |
2029 | vmlinux_maps[type]->map_ip = |
2030 | vmlinux_maps[type]->unmap_ip = identity__map_ip; | |
9de89fe7 ACM |
2031 | |
2032 | kmap = map__kmap(vmlinux_maps[type]); | |
2033 | kmap->kmaps = self; | |
de176489 | 2034 | map_groups__insert(self, vmlinux_maps[type]); |
f1dfa0b1 ACM |
2035 | } |
2036 | ||
f1dfa0b1 | 2037 | return 0; |
2446042c ACM |
2038 | } |
2039 | ||
cc612d81 ACM |
2040 | static void vmlinux_path__exit(void) |
2041 | { | |
2042 | while (--vmlinux_path__nr_entries >= 0) { | |
2043 | free(vmlinux_path[vmlinux_path__nr_entries]); | |
2044 | vmlinux_path[vmlinux_path__nr_entries] = NULL; | |
2045 | } | |
2046 | ||
2047 | free(vmlinux_path); | |
2048 | vmlinux_path = NULL; | |
2049 | } | |
2050 | ||
2051 | static int vmlinux_path__init(void) | |
2052 | { | |
2053 | struct utsname uts; | |
2054 | char bf[PATH_MAX]; | |
2055 | ||
2056 | if (uname(&uts) < 0) | |
2057 | return -1; | |
2058 | ||
2059 | vmlinux_path = malloc(sizeof(char *) * 5); | |
2060 | if (vmlinux_path == NULL) | |
2061 | return -1; | |
2062 | ||
2063 | vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux"); | |
2064 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2065 | goto out_fail; | |
2066 | ++vmlinux_path__nr_entries; | |
2067 | vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux"); | |
2068 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2069 | goto out_fail; | |
2070 | ++vmlinux_path__nr_entries; | |
2071 | snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", uts.release); | |
2072 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2073 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2074 | goto out_fail; | |
2075 | ++vmlinux_path__nr_entries; | |
2076 | snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", uts.release); | |
2077 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2078 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2079 | goto out_fail; | |
2080 | ++vmlinux_path__nr_entries; | |
2081 | snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux", | |
2082 | uts.release); | |
2083 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2084 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2085 | goto out_fail; | |
2086 | ++vmlinux_path__nr_entries; | |
2087 | ||
2088 | return 0; | |
2089 | ||
2090 | out_fail: | |
2091 | vmlinux_path__exit(); | |
2092 | return -1; | |
2093 | } | |
2094 | ||
b0a9ab62 ACM |
2095 | size_t vmlinux_path__fprintf(FILE *fp) |
2096 | { | |
2097 | int i; | |
2098 | size_t printed = 0; | |
2099 | ||
2100 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
2101 | printed += fprintf(fp, "[%d] %s\n", i, vmlinux_path[i]); | |
2102 | ||
2103 | return printed; | |
2104 | } | |
2105 | ||
655000e7 ACM |
2106 | static int setup_list(struct strlist **list, const char *list_str, |
2107 | const char *list_name) | |
2108 | { | |
2109 | if (list_str == NULL) | |
2110 | return 0; | |
2111 | ||
2112 | *list = strlist__new(true, list_str); | |
2113 | if (!*list) { | |
2114 | pr_err("problems parsing %s list\n", list_name); | |
2115 | return -1; | |
2116 | } | |
2117 | return 0; | |
2118 | } | |
2119 | ||
75be6cf4 | 2120 | int symbol__init(void) |
2446042c | 2121 | { |
95011c60 | 2122 | elf_version(EV_CURRENT); |
75be6cf4 ACM |
2123 | if (symbol_conf.sort_by_name) |
2124 | symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - | |
2125 | sizeof(struct symbol)); | |
b32d133a | 2126 | |
75be6cf4 | 2127 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init() < 0) |
2446042c ACM |
2128 | return -1; |
2129 | ||
c410a338 ACM |
2130 | if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { |
2131 | pr_err("'.' is the only non valid --field-separator argument\n"); | |
2132 | return -1; | |
2133 | } | |
2134 | ||
655000e7 ACM |
2135 | if (setup_list(&symbol_conf.dso_list, |
2136 | symbol_conf.dso_list_str, "dso") < 0) | |
2137 | return -1; | |
2138 | ||
2139 | if (setup_list(&symbol_conf.comm_list, | |
2140 | symbol_conf.comm_list_str, "comm") < 0) | |
2141 | goto out_free_dso_list; | |
2142 | ||
2143 | if (setup_list(&symbol_conf.sym_list, | |
2144 | symbol_conf.sym_list_str, "symbol") < 0) | |
2145 | goto out_free_comm_list; | |
2146 | ||
4aa65636 | 2147 | return 0; |
655000e7 ACM |
2148 | |
2149 | out_free_dso_list: | |
2150 | strlist__delete(symbol_conf.dso_list); | |
2151 | out_free_comm_list: | |
2152 | strlist__delete(symbol_conf.comm_list); | |
2153 | return -1; | |
4aa65636 ACM |
2154 | } |
2155 | ||
a1645ce1 | 2156 | int map_groups__create_kernel_maps(struct rb_root *kerninfo_root, pid_t pid) |
4aa65636 | 2157 | { |
a1645ce1 ZY |
2158 | struct kernel_info *kerninfo; |
2159 | struct dso *kernel; | |
9de89fe7 | 2160 | |
a1645ce1 ZY |
2161 | kerninfo = kerninfo__findnew(kerninfo_root, pid); |
2162 | if (kerninfo == NULL) | |
2163 | return -1; | |
2164 | kernel = dsos__create_kernel(kerninfo); | |
9de89fe7 ACM |
2165 | if (kernel == NULL) |
2166 | return -1; | |
2167 | ||
a1645ce1 ZY |
2168 | if (__map_groups__create_kernel_maps(&kerninfo->kmaps, |
2169 | kerninfo->vmlinux_maps, kernel) < 0) | |
cc612d81 | 2170 | return -1; |
cc612d81 | 2171 | |
a1645ce1 ZY |
2172 | if (symbol_conf.use_modules && |
2173 | map_groups__create_modules(kerninfo) < 0) | |
10fe12ef | 2174 | pr_debug("Problems creating module maps, continuing anyway...\n"); |
90c83218 ACM |
2175 | /* |
2176 | * Now that we have all the maps created, just set the ->end of them: | |
2177 | */ | |
a1645ce1 | 2178 | map_groups__fixup_end(&kerninfo->kmaps); |
6671cb16 | 2179 | return 0; |
cd84c2ac | 2180 | } |
5aab621b ACM |
2181 | |
2182 | static int hex(char ch) | |
2183 | { | |
2184 | if ((ch >= '0') && (ch <= '9')) | |
2185 | return ch - '0'; | |
2186 | if ((ch >= 'a') && (ch <= 'f')) | |
2187 | return ch - 'a' + 10; | |
2188 | if ((ch >= 'A') && (ch <= 'F')) | |
2189 | return ch - 'A' + 10; | |
2190 | return -1; | |
2191 | } | |
2192 | ||
2193 | /* | |
2194 | * While we find nice hex chars, build a long_val. | |
2195 | * Return number of chars processed. | |
2196 | */ | |
2197 | int hex2u64(const char *ptr, u64 *long_val) | |
2198 | { | |
2199 | const char *p = ptr; | |
2200 | *long_val = 0; | |
2201 | ||
2202 | while (*p) { | |
2203 | const int hex_val = hex(*p); | |
2204 | ||
2205 | if (hex_val < 0) | |
2206 | break; | |
2207 | ||
2208 | *long_val = (*long_val << 4) | hex_val; | |
2209 | p++; | |
2210 | } | |
2211 | ||
2212 | return p - ptr; | |
2213 | } | |
2214 | ||
2215 | char *strxfrchar(char *s, char from, char to) | |
2216 | { | |
2217 | char *p = s; | |
2218 | ||
2219 | while ((p = strchr(p, from)) != NULL) | |
2220 | *p++ = to; | |
2221 | ||
2222 | return s; | |
2223 | } | |
a1645ce1 ZY |
2224 | |
2225 | int map_groups__create_guest_kernel_maps(struct rb_root *kerninfo_root) | |
2226 | { | |
2227 | int ret = 0; | |
2228 | struct dirent **namelist = NULL; | |
2229 | int i, items = 0; | |
2230 | char path[PATH_MAX]; | |
2231 | pid_t pid; | |
2232 | ||
2233 | if (symbol_conf.default_guest_vmlinux_name || | |
2234 | symbol_conf.default_guest_modules || | |
2235 | symbol_conf.default_guest_kallsyms) { | |
2236 | map_groups__create_kernel_maps(kerninfo_root, | |
2237 | DEFAULT_GUEST_KERNEL_ID); | |
2238 | } | |
2239 | ||
2240 | if (symbol_conf.guestmount) { | |
2241 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
2242 | if (items <= 0) | |
2243 | return -ENOENT; | |
2244 | for (i = 0; i < items; i++) { | |
2245 | if (!isdigit(namelist[i]->d_name[0])) { | |
2246 | /* Filter out . and .. */ | |
2247 | continue; | |
2248 | } | |
2249 | pid = atoi(namelist[i]->d_name); | |
2250 | sprintf(path, "%s/%s/proc/kallsyms", | |
2251 | symbol_conf.guestmount, | |
2252 | namelist[i]->d_name); | |
2253 | ret = access(path, R_OK); | |
2254 | if (ret) { | |
2255 | pr_debug("Can't access file %s\n", path); | |
2256 | goto failure; | |
2257 | } | |
2258 | map_groups__create_kernel_maps(kerninfo_root, | |
2259 | pid); | |
2260 | } | |
2261 | failure: | |
2262 | free(namelist); | |
2263 | } | |
2264 | ||
2265 | return ret; | |
2266 | } |