Commit | Line | Data |
---|---|---|
5aab621b ACM |
1 | #define _GNU_SOURCE |
2 | #include <ctype.h> | |
3 | #include <dirent.h> | |
4 | #include <errno.h> | |
5 | #include <libgen.h> | |
6 | #include <stdlib.h> | |
7 | #include <stdio.h> | |
8 | #include <string.h> | |
9 | #include <sys/types.h> | |
10 | #include <sys/stat.h> | |
11 | #include <sys/param.h> | |
12 | #include <fcntl.h> | |
13 | #include <unistd.h> | |
9486aa38 | 14 | #include <inttypes.h> |
b36f19d5 | 15 | #include "build-id.h" |
8a6c5b26 | 16 | #include "debug.h" |
a2928c42 | 17 | #include "symbol.h" |
5aab621b | 18 | #include "strlist.h" |
a2928c42 ACM |
19 | |
20 | #include <libelf.h> | |
21 | #include <gelf.h> | |
22 | #include <elf.h> | |
f1617b40 | 23 | #include <limits.h> |
439d473b | 24 | #include <sys/utsname.h> |
2cdbc46d | 25 | |
3b01a413 ACM |
26 | #ifndef KSYM_NAME_LEN |
27 | #define KSYM_NAME_LEN 128 | |
28 | #endif | |
29 | ||
c12e15e7 ACM |
30 | #ifndef NT_GNU_BUILD_ID |
31 | #define NT_GNU_BUILD_ID 3 | |
32 | #endif | |
33 | ||
21916c38 DM |
34 | static bool dso__build_id_equal(const struct dso *self, u8 *build_id); |
35 | static int elf_read_build_id(Elf *elf, void *bf, size_t size); | |
b0da954a | 36 | static void dsos__add(struct list_head *head, struct dso *dso); |
3610583c | 37 | static struct map *map__new2(u64 start, struct dso *dso, enum map_type type); |
c338aee8 | 38 | static int dso__load_kernel_sym(struct dso *self, struct map *map, |
9de89fe7 | 39 | symbol_filter_t filter); |
a1645ce1 ZY |
40 | static int dso__load_guest_kernel_sym(struct dso *self, struct map *map, |
41 | symbol_filter_t filter); | |
cc612d81 ACM |
42 | static int vmlinux_path__nr_entries; |
43 | static char **vmlinux_path; | |
439d473b | 44 | |
75be6cf4 | 45 | struct symbol_conf symbol_conf = { |
d599db3f | 46 | .exclude_other = true, |
b32d133a ACM |
47 | .use_modules = true, |
48 | .try_vmlinux_path = true, | |
ec5761ea | 49 | .symfs = "", |
b32d133a ACM |
50 | }; |
51 | ||
8a6c5b26 ACM |
52 | int dso__name_len(const struct dso *self) |
53 | { | |
54 | if (verbose) | |
55 | return self->long_name_len; | |
56 | ||
57 | return self->short_name_len; | |
58 | } | |
59 | ||
3610583c ACM |
60 | bool dso__loaded(const struct dso *self, enum map_type type) |
61 | { | |
62 | return self->loaded & (1 << type); | |
63 | } | |
64 | ||
79406cd7 ACM |
65 | bool dso__sorted_by_name(const struct dso *self, enum map_type type) |
66 | { | |
67 | return self->sorted_by_name & (1 << type); | |
68 | } | |
69 | ||
79406cd7 ACM |
70 | static void dso__set_sorted_by_name(struct dso *self, enum map_type type) |
71 | { | |
72 | self->sorted_by_name |= (1 << type); | |
73 | } | |
74 | ||
36a3e646 | 75 | bool symbol_type__is_a(char symbol_type, enum map_type map_type) |
6893d4ee ACM |
76 | { |
77 | switch (map_type) { | |
78 | case MAP__FUNCTION: | |
79 | return symbol_type == 'T' || symbol_type == 'W'; | |
f1dfa0b1 ACM |
80 | case MAP__VARIABLE: |
81 | return symbol_type == 'D' || symbol_type == 'd'; | |
6893d4ee ACM |
82 | default: |
83 | return false; | |
84 | } | |
85 | } | |
86 | ||
fcf1203a | 87 | static void symbols__fixup_end(struct rb_root *self) |
af427bf5 | 88 | { |
fcf1203a | 89 | struct rb_node *nd, *prevnd = rb_first(self); |
2e538c4a | 90 | struct symbol *curr, *prev; |
af427bf5 ACM |
91 | |
92 | if (prevnd == NULL) | |
93 | return; | |
94 | ||
2e538c4a ACM |
95 | curr = rb_entry(prevnd, struct symbol, rb_node); |
96 | ||
af427bf5 | 97 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { |
2e538c4a ACM |
98 | prev = curr; |
99 | curr = rb_entry(nd, struct symbol, rb_node); | |
af427bf5 | 100 | |
3b01a413 | 101 | if (prev->end == prev->start && prev->end != curr->start) |
af427bf5 | 102 | prev->end = curr->start - 1; |
af427bf5 | 103 | } |
2e538c4a ACM |
104 | |
105 | /* Last entry */ | |
106 | if (curr->end == curr->start) | |
107 | curr->end = roundup(curr->start, 4096); | |
af427bf5 ACM |
108 | } |
109 | ||
9958e1f0 | 110 | static void __map_groups__fixup_end(struct map_groups *self, enum map_type type) |
af427bf5 ACM |
111 | { |
112 | struct map *prev, *curr; | |
95011c60 | 113 | struct rb_node *nd, *prevnd = rb_first(&self->maps[type]); |
af427bf5 ACM |
114 | |
115 | if (prevnd == NULL) | |
116 | return; | |
117 | ||
118 | curr = rb_entry(prevnd, struct map, rb_node); | |
af427bf5 ACM |
119 | |
120 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { | |
121 | prev = curr; | |
122 | curr = rb_entry(nd, struct map, rb_node); | |
123 | prev->end = curr->start - 1; | |
2e538c4a | 124 | } |
90c83218 ACM |
125 | |
126 | /* | |
127 | * We still haven't the actual symbols, so guess the | |
128 | * last map final address. | |
129 | */ | |
9d1faba5 | 130 | curr->end = ~0ULL; |
af427bf5 ACM |
131 | } |
132 | ||
9958e1f0 | 133 | static void map_groups__fixup_end(struct map_groups *self) |
23ea4a3f ACM |
134 | { |
135 | int i; | |
136 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
9958e1f0 | 137 | __map_groups__fixup_end(self, i); |
23ea4a3f ACM |
138 | } |
139 | ||
c408fedf ACM |
140 | static struct symbol *symbol__new(u64 start, u64 len, u8 binding, |
141 | const char *name) | |
a2928c42 | 142 | { |
0085c954 | 143 | size_t namelen = strlen(name) + 1; |
5aab621b ACM |
144 | struct symbol *self = calloc(1, (symbol_conf.priv_size + |
145 | sizeof(*self) + namelen)); | |
36479484 | 146 | if (self == NULL) |
0b73da3f IM |
147 | return NULL; |
148 | ||
75be6cf4 ACM |
149 | if (symbol_conf.priv_size) |
150 | self = ((void *)self) + symbol_conf.priv_size; | |
36479484 | 151 | |
fefb0b94 ACM |
152 | self->start = start; |
153 | self->end = len ? start + len - 1 : start; | |
c408fedf | 154 | self->binding = binding; |
fefb0b94 | 155 | self->namelen = namelen - 1; |
e4204992 | 156 | |
9486aa38 | 157 | pr_debug4("%s: %s %#" PRIx64 "-%#" PRIx64 "\n", __func__, name, start, self->end); |
e4204992 | 158 | |
0b73da3f | 159 | memcpy(self->name, name, namelen); |
a2928c42 ACM |
160 | |
161 | return self; | |
162 | } | |
163 | ||
628ada0c | 164 | void symbol__delete(struct symbol *self) |
a2928c42 | 165 | { |
75be6cf4 | 166 | free(((void *)self) - symbol_conf.priv_size); |
a2928c42 ACM |
167 | } |
168 | ||
169 | static size_t symbol__fprintf(struct symbol *self, FILE *fp) | |
170 | { | |
9486aa38 | 171 | return fprintf(fp, " %" PRIx64 "-%" PRIx64 " %c %s\n", |
c408fedf ACM |
172 | self->start, self->end, |
173 | self->binding == STB_GLOBAL ? 'g' : | |
174 | self->binding == STB_LOCAL ? 'l' : 'w', | |
175 | self->name); | |
a2928c42 ACM |
176 | } |
177 | ||
b7cece76 | 178 | void dso__set_long_name(struct dso *self, char *name) |
cfc10d3b | 179 | { |
ef6ae724 ACM |
180 | if (name == NULL) |
181 | return; | |
cfc10d3b ACM |
182 | self->long_name = name; |
183 | self->long_name_len = strlen(name); | |
184 | } | |
185 | ||
b63be8d7 ACM |
186 | static void dso__set_short_name(struct dso *self, const char *name) |
187 | { | |
188 | if (name == NULL) | |
189 | return; | |
190 | self->short_name = name; | |
191 | self->short_name_len = strlen(name); | |
192 | } | |
193 | ||
cfc10d3b ACM |
194 | static void dso__set_basename(struct dso *self) |
195 | { | |
b63be8d7 | 196 | dso__set_short_name(self, basename(self->long_name)); |
cfc10d3b ACM |
197 | } |
198 | ||
00a192b3 | 199 | struct dso *dso__new(const char *name) |
a2928c42 | 200 | { |
5aab621b | 201 | struct dso *self = calloc(1, sizeof(*self) + strlen(name) + 1); |
a2928c42 ACM |
202 | |
203 | if (self != NULL) { | |
6a4694a4 | 204 | int i; |
a2928c42 | 205 | strcpy(self->name, name); |
cfc10d3b | 206 | dso__set_long_name(self, self->name); |
b63be8d7 | 207 | dso__set_short_name(self, self->name); |
6a4694a4 | 208 | for (i = 0; i < MAP__NR_TYPES; ++i) |
79406cd7 | 209 | self->symbols[i] = self->symbol_names[i] = RB_ROOT; |
878b439d | 210 | self->symtab_type = SYMTAB__NOT_FOUND; |
8d06367f | 211 | self->loaded = 0; |
79406cd7 | 212 | self->sorted_by_name = 0; |
8d06367f | 213 | self->has_build_id = 0; |
a1645ce1 | 214 | self->kernel = DSO_TYPE_USER; |
0ab061cd | 215 | INIT_LIST_HEAD(&self->node); |
a2928c42 ACM |
216 | } |
217 | ||
218 | return self; | |
219 | } | |
220 | ||
fcf1203a | 221 | static void symbols__delete(struct rb_root *self) |
a2928c42 ACM |
222 | { |
223 | struct symbol *pos; | |
fcf1203a | 224 | struct rb_node *next = rb_first(self); |
a2928c42 ACM |
225 | |
226 | while (next) { | |
227 | pos = rb_entry(next, struct symbol, rb_node); | |
228 | next = rb_next(&pos->rb_node); | |
fcf1203a | 229 | rb_erase(&pos->rb_node, self); |
00a192b3 | 230 | symbol__delete(pos); |
a2928c42 ACM |
231 | } |
232 | } | |
233 | ||
234 | void dso__delete(struct dso *self) | |
235 | { | |
6a4694a4 ACM |
236 | int i; |
237 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
238 | symbols__delete(&self->symbols[i]); | |
6e406257 ACM |
239 | if (self->sname_alloc) |
240 | free((char *)self->short_name); | |
241 | if (self->lname_alloc) | |
439d473b | 242 | free(self->long_name); |
a2928c42 ACM |
243 | free(self); |
244 | } | |
245 | ||
8d06367f ACM |
246 | void dso__set_build_id(struct dso *self, void *build_id) |
247 | { | |
248 | memcpy(self->build_id, build_id, sizeof(self->build_id)); | |
249 | self->has_build_id = 1; | |
250 | } | |
251 | ||
fcf1203a | 252 | static void symbols__insert(struct rb_root *self, struct symbol *sym) |
a2928c42 | 253 | { |
fcf1203a | 254 | struct rb_node **p = &self->rb_node; |
a2928c42 | 255 | struct rb_node *parent = NULL; |
9cffa8d5 | 256 | const u64 ip = sym->start; |
a2928c42 ACM |
257 | struct symbol *s; |
258 | ||
259 | while (*p != NULL) { | |
260 | parent = *p; | |
261 | s = rb_entry(parent, struct symbol, rb_node); | |
262 | if (ip < s->start) | |
263 | p = &(*p)->rb_left; | |
264 | else | |
265 | p = &(*p)->rb_right; | |
266 | } | |
267 | rb_link_node(&sym->rb_node, parent, p); | |
fcf1203a | 268 | rb_insert_color(&sym->rb_node, self); |
a2928c42 ACM |
269 | } |
270 | ||
fcf1203a | 271 | static struct symbol *symbols__find(struct rb_root *self, u64 ip) |
a2928c42 ACM |
272 | { |
273 | struct rb_node *n; | |
274 | ||
275 | if (self == NULL) | |
276 | return NULL; | |
277 | ||
fcf1203a | 278 | n = self->rb_node; |
a2928c42 ACM |
279 | |
280 | while (n) { | |
281 | struct symbol *s = rb_entry(n, struct symbol, rb_node); | |
282 | ||
283 | if (ip < s->start) | |
284 | n = n->rb_left; | |
285 | else if (ip > s->end) | |
286 | n = n->rb_right; | |
287 | else | |
288 | return s; | |
289 | } | |
290 | ||
291 | return NULL; | |
292 | } | |
293 | ||
79406cd7 ACM |
294 | struct symbol_name_rb_node { |
295 | struct rb_node rb_node; | |
296 | struct symbol sym; | |
297 | }; | |
298 | ||
299 | static void symbols__insert_by_name(struct rb_root *self, struct symbol *sym) | |
300 | { | |
301 | struct rb_node **p = &self->rb_node; | |
302 | struct rb_node *parent = NULL; | |
02a9d037 RV |
303 | struct symbol_name_rb_node *symn, *s; |
304 | ||
305 | symn = container_of(sym, struct symbol_name_rb_node, sym); | |
79406cd7 ACM |
306 | |
307 | while (*p != NULL) { | |
308 | parent = *p; | |
309 | s = rb_entry(parent, struct symbol_name_rb_node, rb_node); | |
310 | if (strcmp(sym->name, s->sym.name) < 0) | |
311 | p = &(*p)->rb_left; | |
312 | else | |
313 | p = &(*p)->rb_right; | |
314 | } | |
315 | rb_link_node(&symn->rb_node, parent, p); | |
316 | rb_insert_color(&symn->rb_node, self); | |
317 | } | |
318 | ||
319 | static void symbols__sort_by_name(struct rb_root *self, struct rb_root *source) | |
320 | { | |
321 | struct rb_node *nd; | |
322 | ||
323 | for (nd = rb_first(source); nd; nd = rb_next(nd)) { | |
324 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
325 | symbols__insert_by_name(self, pos); | |
326 | } | |
327 | } | |
328 | ||
329 | static struct symbol *symbols__find_by_name(struct rb_root *self, const char *name) | |
330 | { | |
331 | struct rb_node *n; | |
332 | ||
333 | if (self == NULL) | |
334 | return NULL; | |
335 | ||
336 | n = self->rb_node; | |
337 | ||
338 | while (n) { | |
339 | struct symbol_name_rb_node *s; | |
340 | int cmp; | |
341 | ||
342 | s = rb_entry(n, struct symbol_name_rb_node, rb_node); | |
343 | cmp = strcmp(name, s->sym.name); | |
344 | ||
345 | if (cmp < 0) | |
346 | n = n->rb_left; | |
347 | else if (cmp > 0) | |
348 | n = n->rb_right; | |
349 | else | |
350 | return &s->sym; | |
351 | } | |
352 | ||
353 | return NULL; | |
354 | } | |
355 | ||
356 | struct symbol *dso__find_symbol(struct dso *self, | |
357 | enum map_type type, u64 addr) | |
fcf1203a | 358 | { |
6a4694a4 | 359 | return symbols__find(&self->symbols[type], addr); |
fcf1203a ACM |
360 | } |
361 | ||
79406cd7 ACM |
362 | struct symbol *dso__find_symbol_by_name(struct dso *self, enum map_type type, |
363 | const char *name) | |
364 | { | |
365 | return symbols__find_by_name(&self->symbol_names[type], name); | |
366 | } | |
367 | ||
368 | void dso__sort_by_name(struct dso *self, enum map_type type) | |
369 | { | |
370 | dso__set_sorted_by_name(self, type); | |
371 | return symbols__sort_by_name(&self->symbol_names[type], | |
372 | &self->symbols[type]); | |
373 | } | |
374 | ||
ef12a141 | 375 | int build_id__sprintf(const u8 *self, int len, char *bf) |
a2928c42 | 376 | { |
8d06367f | 377 | char *bid = bf; |
ef12a141 | 378 | const u8 *raw = self; |
8d06367f | 379 | int i; |
a2928c42 | 380 | |
8d06367f ACM |
381 | for (i = 0; i < len; ++i) { |
382 | sprintf(bid, "%02x", *raw); | |
383 | ++raw; | |
384 | bid += 2; | |
385 | } | |
386 | ||
387 | return raw - self; | |
388 | } | |
389 | ||
9e03eb2d | 390 | size_t dso__fprintf_buildid(struct dso *self, FILE *fp) |
8d06367f ACM |
391 | { |
392 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
8d06367f ACM |
393 | |
394 | build_id__sprintf(self->build_id, sizeof(self->build_id), sbuild_id); | |
9e03eb2d ACM |
395 | return fprintf(fp, "%s", sbuild_id); |
396 | } | |
397 | ||
90f18e63 SD |
398 | size_t dso__fprintf_symbols_by_name(struct dso *self, enum map_type type, FILE *fp) |
399 | { | |
400 | size_t ret = 0; | |
401 | struct rb_node *nd; | |
402 | struct symbol_name_rb_node *pos; | |
403 | ||
404 | for (nd = rb_first(&self->symbol_names[type]); nd; nd = rb_next(nd)) { | |
405 | pos = rb_entry(nd, struct symbol_name_rb_node, rb_node); | |
406 | fprintf(fp, "%s\n", pos->sym.name); | |
407 | } | |
408 | ||
409 | return ret; | |
410 | } | |
411 | ||
95011c60 | 412 | size_t dso__fprintf(struct dso *self, enum map_type type, FILE *fp) |
9e03eb2d ACM |
413 | { |
414 | struct rb_node *nd; | |
415 | size_t ret = fprintf(fp, "dso: %s (", self->short_name); | |
416 | ||
3846df2e ACM |
417 | if (self->short_name != self->long_name) |
418 | ret += fprintf(fp, "%s, ", self->long_name); | |
419 | ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type], | |
420 | self->loaded ? "" : "NOT "); | |
9e03eb2d | 421 | ret += dso__fprintf_buildid(self, fp); |
6a4694a4 | 422 | ret += fprintf(fp, ")\n"); |
95011c60 ACM |
423 | for (nd = rb_first(&self->symbols[type]); nd; nd = rb_next(nd)) { |
424 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
425 | ret += symbol__fprintf(pos, fp); | |
a2928c42 ACM |
426 | } |
427 | ||
428 | return ret; | |
429 | } | |
430 | ||
9e201442 ACM |
431 | int kallsyms__parse(const char *filename, void *arg, |
432 | int (*process_symbol)(void *arg, const char *name, | |
3b01a413 | 433 | char type, u64 start, u64 end)) |
a2928c42 | 434 | { |
a2928c42 ACM |
435 | char *line = NULL; |
436 | size_t n; | |
3b01a413 ACM |
437 | int err = -1; |
438 | u64 prev_start = 0; | |
439 | char prev_symbol_type = 0; | |
440 | char *prev_symbol_name; | |
9e201442 | 441 | FILE *file = fopen(filename, "r"); |
a2928c42 ACM |
442 | |
443 | if (file == NULL) | |
444 | goto out_failure; | |
445 | ||
3b01a413 ACM |
446 | prev_symbol_name = malloc(KSYM_NAME_LEN); |
447 | if (prev_symbol_name == NULL) | |
448 | goto out_close; | |
449 | ||
450 | err = 0; | |
451 | ||
a2928c42 | 452 | while (!feof(file)) { |
9cffa8d5 | 453 | u64 start; |
a2928c42 ACM |
454 | int line_len, len; |
455 | char symbol_type; | |
2e538c4a | 456 | char *symbol_name; |
a2928c42 ACM |
457 | |
458 | line_len = getline(&line, &n, file); | |
a1645ce1 | 459 | if (line_len < 0 || !line) |
a2928c42 ACM |
460 | break; |
461 | ||
a2928c42 ACM |
462 | line[--line_len] = '\0'; /* \n */ |
463 | ||
a0055ae2 | 464 | len = hex2u64(line, &start); |
a2928c42 ACM |
465 | |
466 | len++; | |
467 | if (len + 2 >= line_len) | |
468 | continue; | |
469 | ||
470 | symbol_type = toupper(line[len]); | |
3b01a413 ACM |
471 | len += 2; |
472 | symbol_name = line + len; | |
473 | len = line_len - len; | |
682b335a | 474 | |
3b01a413 ACM |
475 | if (len >= KSYM_NAME_LEN) { |
476 | err = -1; | |
682b335a | 477 | break; |
3b01a413 ACM |
478 | } |
479 | ||
480 | if (prev_symbol_type) { | |
481 | u64 end = start; | |
482 | if (end != prev_start) | |
483 | --end; | |
484 | err = process_symbol(arg, prev_symbol_name, | |
485 | prev_symbol_type, prev_start, end); | |
486 | if (err) | |
487 | break; | |
488 | } | |
489 | ||
490 | memcpy(prev_symbol_name, symbol_name, len + 1); | |
491 | prev_symbol_type = symbol_type; | |
492 | prev_start = start; | |
2e538c4a ACM |
493 | } |
494 | ||
3b01a413 | 495 | free(prev_symbol_name); |
2e538c4a | 496 | free(line); |
3b01a413 | 497 | out_close: |
2e538c4a | 498 | fclose(file); |
682b335a | 499 | return err; |
2e538c4a | 500 | |
2e538c4a ACM |
501 | out_failure: |
502 | return -1; | |
503 | } | |
504 | ||
682b335a ACM |
505 | struct process_kallsyms_args { |
506 | struct map *map; | |
507 | struct dso *dso; | |
508 | }; | |
509 | ||
c408fedf ACM |
510 | static u8 kallsyms2elf_type(char type) |
511 | { | |
512 | if (type == 'W') | |
513 | return STB_WEAK; | |
514 | ||
515 | return isupper(type) ? STB_GLOBAL : STB_LOCAL; | |
516 | } | |
517 | ||
682b335a | 518 | static int map__process_kallsym_symbol(void *arg, const char *name, |
3b01a413 | 519 | char type, u64 start, u64 end) |
682b335a ACM |
520 | { |
521 | struct symbol *sym; | |
522 | struct process_kallsyms_args *a = arg; | |
523 | struct rb_root *root = &a->dso->symbols[a->map->type]; | |
524 | ||
525 | if (!symbol_type__is_a(type, a->map->type)) | |
526 | return 0; | |
527 | ||
3b01a413 ACM |
528 | sym = symbol__new(start, end - start + 1, |
529 | kallsyms2elf_type(type), name); | |
682b335a ACM |
530 | if (sym == NULL) |
531 | return -ENOMEM; | |
532 | /* | |
533 | * We will pass the symbols to the filter later, in | |
534 | * map__split_kallsyms, when we have split the maps per module | |
535 | */ | |
536 | symbols__insert(root, sym); | |
a1645ce1 | 537 | |
682b335a ACM |
538 | return 0; |
539 | } | |
540 | ||
541 | /* | |
542 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
543 | * so that we can in the next step set the symbol ->end address and then | |
544 | * call kernel_maps__split_kallsyms. | |
545 | */ | |
9e201442 ACM |
546 | static int dso__load_all_kallsyms(struct dso *self, const char *filename, |
547 | struct map *map) | |
682b335a ACM |
548 | { |
549 | struct process_kallsyms_args args = { .map = map, .dso = self, }; | |
9e201442 | 550 | return kallsyms__parse(filename, &args, map__process_kallsym_symbol); |
682b335a ACM |
551 | } |
552 | ||
2e538c4a ACM |
553 | /* |
554 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
555 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
556 | * the original ELF section names vmlinux have. | |
557 | */ | |
9958e1f0 | 558 | static int dso__split_kallsyms(struct dso *self, struct map *map, |
9de89fe7 | 559 | symbol_filter_t filter) |
2e538c4a | 560 | { |
9de89fe7 | 561 | struct map_groups *kmaps = map__kmap(map)->kmaps; |
23346f21 | 562 | struct machine *machine = kmaps->machine; |
4e06255f | 563 | struct map *curr_map = map; |
2e538c4a | 564 | struct symbol *pos; |
8a953312 | 565 | int count = 0, moved = 0; |
4e06255f ACM |
566 | struct rb_root *root = &self->symbols[map->type]; |
567 | struct rb_node *next = rb_first(root); | |
2e538c4a ACM |
568 | int kernel_range = 0; |
569 | ||
570 | while (next) { | |
571 | char *module; | |
572 | ||
573 | pos = rb_entry(next, struct symbol, rb_node); | |
574 | next = rb_next(&pos->rb_node); | |
575 | ||
576 | module = strchr(pos->name, '\t'); | |
577 | if (module) { | |
75be6cf4 | 578 | if (!symbol_conf.use_modules) |
1de8e245 ACM |
579 | goto discard_symbol; |
580 | ||
2e538c4a ACM |
581 | *module++ = '\0'; |
582 | ||
b7cece76 | 583 | if (strcmp(curr_map->dso->short_name, module)) { |
a1645ce1 | 584 | if (curr_map != map && |
23346f21 ACM |
585 | self->kernel == DSO_TYPE_GUEST_KERNEL && |
586 | machine__is_default_guest(machine)) { | |
a1645ce1 ZY |
587 | /* |
588 | * We assume all symbols of a module are | |
589 | * continuous in * kallsyms, so curr_map | |
590 | * points to a module and all its | |
591 | * symbols are in its kmap. Mark it as | |
592 | * loaded. | |
593 | */ | |
594 | dso__set_loaded(curr_map->dso, | |
595 | curr_map->type); | |
596 | } | |
597 | ||
598 | curr_map = map_groups__find_by_name(kmaps, | |
599 | map->type, module); | |
4e06255f | 600 | if (curr_map == NULL) { |
2f51903b | 601 | pr_debug("%s/proc/{kallsyms,modules} " |
b7cece76 | 602 | "inconsistency while looking " |
a1645ce1 | 603 | "for \"%s\" module!\n", |
23346f21 | 604 | machine->root_dir, module); |
a1645ce1 ZY |
605 | curr_map = map; |
606 | goto discard_symbol; | |
af427bf5 | 607 | } |
b7cece76 | 608 | |
a1645ce1 | 609 | if (curr_map->dso->loaded && |
23346f21 | 610 | !machine__is_default_guest(machine)) |
b7cece76 | 611 | goto discard_symbol; |
af427bf5 | 612 | } |
2e538c4a ACM |
613 | /* |
614 | * So that we look just like we get from .ko files, | |
615 | * i.e. not prelinked, relative to map->start. | |
616 | */ | |
4e06255f ACM |
617 | pos->start = curr_map->map_ip(curr_map, pos->start); |
618 | pos->end = curr_map->map_ip(curr_map, pos->end); | |
619 | } else if (curr_map != map) { | |
2e538c4a ACM |
620 | char dso_name[PATH_MAX]; |
621 | struct dso *dso; | |
622 | ||
8a953312 ACM |
623 | if (count == 0) { |
624 | curr_map = map; | |
625 | goto filter_symbol; | |
626 | } | |
627 | ||
a1645ce1 ZY |
628 | if (self->kernel == DSO_TYPE_GUEST_KERNEL) |
629 | snprintf(dso_name, sizeof(dso_name), | |
630 | "[guest.kernel].%d", | |
631 | kernel_range++); | |
632 | else | |
633 | snprintf(dso_name, sizeof(dso_name), | |
634 | "[kernel].%d", | |
635 | kernel_range++); | |
2e538c4a | 636 | |
00a192b3 | 637 | dso = dso__new(dso_name); |
2e538c4a ACM |
638 | if (dso == NULL) |
639 | return -1; | |
640 | ||
a1645ce1 ZY |
641 | dso->kernel = self->kernel; |
642 | ||
4e06255f | 643 | curr_map = map__new2(pos->start, dso, map->type); |
37fe5fcb | 644 | if (curr_map == NULL) { |
2e538c4a ACM |
645 | dso__delete(dso); |
646 | return -1; | |
647 | } | |
a2928c42 | 648 | |
4e06255f | 649 | curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; |
9de89fe7 | 650 | map_groups__insert(kmaps, curr_map); |
2e538c4a ACM |
651 | ++kernel_range; |
652 | } | |
8a953312 | 653 | filter_symbol: |
4e06255f | 654 | if (filter && filter(curr_map, pos)) { |
1de8e245 | 655 | discard_symbol: rb_erase(&pos->rb_node, root); |
00a192b3 | 656 | symbol__delete(pos); |
2e538c4a | 657 | } else { |
4e06255f ACM |
658 | if (curr_map != map) { |
659 | rb_erase(&pos->rb_node, root); | |
660 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
8a953312 ACM |
661 | ++moved; |
662 | } else | |
663 | ++count; | |
9974f496 | 664 | } |
a2928c42 ACM |
665 | } |
666 | ||
a1645ce1 ZY |
667 | if (curr_map != map && |
668 | self->kernel == DSO_TYPE_GUEST_KERNEL && | |
23346f21 | 669 | machine__is_default_guest(kmaps->machine)) { |
a1645ce1 ZY |
670 | dso__set_loaded(curr_map->dso, curr_map->type); |
671 | } | |
672 | ||
8a953312 | 673 | return count + moved; |
2e538c4a | 674 | } |
a2928c42 | 675 | |
9de89fe7 ACM |
676 | int dso__load_kallsyms(struct dso *self, const char *filename, |
677 | struct map *map, symbol_filter_t filter) | |
2e538c4a | 678 | { |
9e201442 | 679 | if (dso__load_all_kallsyms(self, filename, map) < 0) |
2e538c4a ACM |
680 | return -1; |
681 | ||
a1645ce1 | 682 | if (self->kernel == DSO_TYPE_GUEST_KERNEL) |
878b439d | 683 | self->symtab_type = SYMTAB__GUEST_KALLSYMS; |
a1645ce1 | 684 | else |
878b439d | 685 | self->symtab_type = SYMTAB__KALLSYMS; |
2e538c4a | 686 | |
9de89fe7 | 687 | return dso__split_kallsyms(self, map, filter); |
af427bf5 ACM |
688 | } |
689 | ||
439d473b | 690 | static int dso__load_perf_map(struct dso *self, struct map *map, |
6beba7ad | 691 | symbol_filter_t filter) |
80d496be PE |
692 | { |
693 | char *line = NULL; | |
694 | size_t n; | |
695 | FILE *file; | |
696 | int nr_syms = 0; | |
697 | ||
439d473b | 698 | file = fopen(self->long_name, "r"); |
80d496be PE |
699 | if (file == NULL) |
700 | goto out_failure; | |
701 | ||
702 | while (!feof(file)) { | |
9cffa8d5 | 703 | u64 start, size; |
80d496be PE |
704 | struct symbol *sym; |
705 | int line_len, len; | |
706 | ||
707 | line_len = getline(&line, &n, file); | |
708 | if (line_len < 0) | |
709 | break; | |
710 | ||
711 | if (!line) | |
712 | goto out_failure; | |
713 | ||
714 | line[--line_len] = '\0'; /* \n */ | |
715 | ||
716 | len = hex2u64(line, &start); | |
717 | ||
718 | len++; | |
719 | if (len + 2 >= line_len) | |
720 | continue; | |
721 | ||
722 | len += hex2u64(line + len, &size); | |
723 | ||
724 | len++; | |
725 | if (len + 2 >= line_len) | |
726 | continue; | |
727 | ||
c408fedf | 728 | sym = symbol__new(start, size, STB_GLOBAL, line + len); |
80d496be PE |
729 | |
730 | if (sym == NULL) | |
731 | goto out_delete_line; | |
732 | ||
439d473b | 733 | if (filter && filter(map, sym)) |
00a192b3 | 734 | symbol__delete(sym); |
80d496be | 735 | else { |
6a4694a4 | 736 | symbols__insert(&self->symbols[map->type], sym); |
80d496be PE |
737 | nr_syms++; |
738 | } | |
739 | } | |
740 | ||
741 | free(line); | |
742 | fclose(file); | |
743 | ||
744 | return nr_syms; | |
745 | ||
746 | out_delete_line: | |
747 | free(line); | |
748 | out_failure: | |
749 | return -1; | |
750 | } | |
751 | ||
a2928c42 ACM |
752 | /** |
753 | * elf_symtab__for_each_symbol - iterate thru all the symbols | |
754 | * | |
755 | * @self: struct elf_symtab instance to iterate | |
83a0944f | 756 | * @idx: uint32_t idx |
a2928c42 ACM |
757 | * @sym: GElf_Sym iterator |
758 | */ | |
83a0944f IM |
759 | #define elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) \ |
760 | for (idx = 0, gelf_getsym(syms, idx, &sym);\ | |
761 | idx < nr_syms; \ | |
762 | idx++, gelf_getsym(syms, idx, &sym)) | |
a2928c42 ACM |
763 | |
764 | static inline uint8_t elf_sym__type(const GElf_Sym *sym) | |
765 | { | |
766 | return GELF_ST_TYPE(sym->st_info); | |
767 | } | |
768 | ||
769 | static inline int elf_sym__is_function(const GElf_Sym *sym) | |
770 | { | |
771 | return elf_sym__type(sym) == STT_FUNC && | |
772 | sym->st_name != 0 && | |
81833130 | 773 | sym->st_shndx != SHN_UNDEF; |
a2928c42 ACM |
774 | } |
775 | ||
f1dfa0b1 ACM |
776 | static inline bool elf_sym__is_object(const GElf_Sym *sym) |
777 | { | |
778 | return elf_sym__type(sym) == STT_OBJECT && | |
779 | sym->st_name != 0 && | |
780 | sym->st_shndx != SHN_UNDEF; | |
781 | } | |
782 | ||
6cfcc53e MG |
783 | static inline int elf_sym__is_label(const GElf_Sym *sym) |
784 | { | |
785 | return elf_sym__type(sym) == STT_NOTYPE && | |
786 | sym->st_name != 0 && | |
787 | sym->st_shndx != SHN_UNDEF && | |
788 | sym->st_shndx != SHN_ABS; | |
789 | } | |
790 | ||
791 | static inline const char *elf_sec__name(const GElf_Shdr *shdr, | |
792 | const Elf_Data *secstrs) | |
793 | { | |
794 | return secstrs->d_buf + shdr->sh_name; | |
795 | } | |
796 | ||
797 | static inline int elf_sec__is_text(const GElf_Shdr *shdr, | |
798 | const Elf_Data *secstrs) | |
799 | { | |
800 | return strstr(elf_sec__name(shdr, secstrs), "text") != NULL; | |
801 | } | |
802 | ||
f1dfa0b1 ACM |
803 | static inline bool elf_sec__is_data(const GElf_Shdr *shdr, |
804 | const Elf_Data *secstrs) | |
805 | { | |
806 | return strstr(elf_sec__name(shdr, secstrs), "data") != NULL; | |
807 | } | |
808 | ||
a2928c42 ACM |
809 | static inline const char *elf_sym__name(const GElf_Sym *sym, |
810 | const Elf_Data *symstrs) | |
811 | { | |
812 | return symstrs->d_buf + sym->st_name; | |
813 | } | |
814 | ||
815 | static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, | |
816 | GElf_Shdr *shp, const char *name, | |
83a0944f | 817 | size_t *idx) |
a2928c42 ACM |
818 | { |
819 | Elf_Scn *sec = NULL; | |
820 | size_t cnt = 1; | |
821 | ||
822 | while ((sec = elf_nextscn(elf, sec)) != NULL) { | |
823 | char *str; | |
824 | ||
825 | gelf_getshdr(sec, shp); | |
826 | str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name); | |
827 | if (!strcmp(name, str)) { | |
83a0944f IM |
828 | if (idx) |
829 | *idx = cnt; | |
a2928c42 ACM |
830 | break; |
831 | } | |
832 | ++cnt; | |
833 | } | |
834 | ||
835 | return sec; | |
836 | } | |
837 | ||
8ce998d6 ACM |
838 | #define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \ |
839 | for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \ | |
840 | idx < nr_entries; \ | |
841 | ++idx, pos = gelf_getrel(reldata, idx, &pos_mem)) | |
842 | ||
843 | #define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \ | |
844 | for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \ | |
845 | idx < nr_entries; \ | |
846 | ++idx, pos = gelf_getrela(reldata, idx, &pos_mem)) | |
847 | ||
a25e46c4 ACM |
848 | /* |
849 | * We need to check if we have a .dynsym, so that we can handle the | |
850 | * .plt, synthesizing its symbols, that aren't on the symtabs (be it | |
851 | * .dynsym or .symtab). | |
852 | * And always look at the original dso, not at debuginfo packages, that | |
853 | * have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS). | |
854 | */ | |
82164161 ACM |
855 | static int dso__synthesize_plt_symbols(struct dso *self, struct map *map, |
856 | symbol_filter_t filter) | |
8ce998d6 ACM |
857 | { |
858 | uint32_t nr_rel_entries, idx; | |
859 | GElf_Sym sym; | |
9cffa8d5 | 860 | u64 plt_offset; |
8ce998d6 ACM |
861 | GElf_Shdr shdr_plt; |
862 | struct symbol *f; | |
a25e46c4 | 863 | GElf_Shdr shdr_rel_plt, shdr_dynsym; |
8ce998d6 | 864 | Elf_Data *reldata, *syms, *symstrs; |
a25e46c4 ACM |
865 | Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym; |
866 | size_t dynsym_idx; | |
867 | GElf_Ehdr ehdr; | |
8ce998d6 | 868 | char sympltname[1024]; |
a25e46c4 ACM |
869 | Elf *elf; |
870 | int nr = 0, symidx, fd, err = 0; | |
ec5761ea | 871 | char name[PATH_MAX]; |
a25e46c4 | 872 | |
ec5761ea DA |
873 | snprintf(name, sizeof(name), "%s%s", |
874 | symbol_conf.symfs, self->long_name); | |
875 | fd = open(name, O_RDONLY); | |
a25e46c4 ACM |
876 | if (fd < 0) |
877 | goto out; | |
878 | ||
84087126 | 879 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a25e46c4 ACM |
880 | if (elf == NULL) |
881 | goto out_close; | |
882 | ||
883 | if (gelf_getehdr(elf, &ehdr) == NULL) | |
884 | goto out_elf_end; | |
885 | ||
886 | scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym, | |
887 | ".dynsym", &dynsym_idx); | |
888 | if (scn_dynsym == NULL) | |
889 | goto out_elf_end; | |
8ce998d6 | 890 | |
a25e46c4 | 891 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
892 | ".rela.plt", NULL); |
893 | if (scn_plt_rel == NULL) { | |
a25e46c4 | 894 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
895 | ".rel.plt", NULL); |
896 | if (scn_plt_rel == NULL) | |
a25e46c4 | 897 | goto out_elf_end; |
8ce998d6 ACM |
898 | } |
899 | ||
a25e46c4 ACM |
900 | err = -1; |
901 | ||
8ce998d6 | 902 | if (shdr_rel_plt.sh_link != dynsym_idx) |
a25e46c4 | 903 | goto out_elf_end; |
8ce998d6 | 904 | |
a25e46c4 ACM |
905 | if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL) |
906 | goto out_elf_end; | |
8ce998d6 ACM |
907 | |
908 | /* | |
83a0944f | 909 | * Fetch the relocation section to find the idxes to the GOT |
8ce998d6 ACM |
910 | * and the symbols in the .dynsym they refer to. |
911 | */ | |
912 | reldata = elf_getdata(scn_plt_rel, NULL); | |
913 | if (reldata == NULL) | |
a25e46c4 | 914 | goto out_elf_end; |
8ce998d6 ACM |
915 | |
916 | syms = elf_getdata(scn_dynsym, NULL); | |
917 | if (syms == NULL) | |
a25e46c4 | 918 | goto out_elf_end; |
8ce998d6 | 919 | |
a25e46c4 | 920 | scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link); |
8ce998d6 | 921 | if (scn_symstrs == NULL) |
a25e46c4 | 922 | goto out_elf_end; |
8ce998d6 ACM |
923 | |
924 | symstrs = elf_getdata(scn_symstrs, NULL); | |
925 | if (symstrs == NULL) | |
a25e46c4 | 926 | goto out_elf_end; |
8ce998d6 ACM |
927 | |
928 | nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize; | |
929 | plt_offset = shdr_plt.sh_offset; | |
930 | ||
931 | if (shdr_rel_plt.sh_type == SHT_RELA) { | |
932 | GElf_Rela pos_mem, *pos; | |
933 | ||
934 | elf_section__for_each_rela(reldata, pos, pos_mem, idx, | |
935 | nr_rel_entries) { | |
936 | symidx = GELF_R_SYM(pos->r_info); | |
937 | plt_offset += shdr_plt.sh_entsize; | |
938 | gelf_getsym(syms, symidx, &sym); | |
939 | snprintf(sympltname, sizeof(sympltname), | |
940 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
941 | ||
942 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
c408fedf | 943 | STB_GLOBAL, sympltname); |
8ce998d6 | 944 | if (!f) |
a25e46c4 | 945 | goto out_elf_end; |
8ce998d6 | 946 | |
82164161 ACM |
947 | if (filter && filter(map, f)) |
948 | symbol__delete(f); | |
949 | else { | |
6a4694a4 | 950 | symbols__insert(&self->symbols[map->type], f); |
82164161 ACM |
951 | ++nr; |
952 | } | |
8ce998d6 ACM |
953 | } |
954 | } else if (shdr_rel_plt.sh_type == SHT_REL) { | |
955 | GElf_Rel pos_mem, *pos; | |
956 | elf_section__for_each_rel(reldata, pos, pos_mem, idx, | |
957 | nr_rel_entries) { | |
958 | symidx = GELF_R_SYM(pos->r_info); | |
959 | plt_offset += shdr_plt.sh_entsize; | |
960 | gelf_getsym(syms, symidx, &sym); | |
961 | snprintf(sympltname, sizeof(sympltname), | |
962 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
963 | ||
964 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
c408fedf | 965 | STB_GLOBAL, sympltname); |
8ce998d6 | 966 | if (!f) |
a25e46c4 | 967 | goto out_elf_end; |
8ce998d6 | 968 | |
82164161 ACM |
969 | if (filter && filter(map, f)) |
970 | symbol__delete(f); | |
971 | else { | |
6a4694a4 | 972 | symbols__insert(&self->symbols[map->type], f); |
82164161 ACM |
973 | ++nr; |
974 | } | |
8ce998d6 | 975 | } |
8ce998d6 ACM |
976 | } |
977 | ||
a25e46c4 ACM |
978 | err = 0; |
979 | out_elf_end: | |
980 | elf_end(elf); | |
981 | out_close: | |
982 | close(fd); | |
983 | ||
984 | if (err == 0) | |
985 | return nr; | |
986 | out: | |
fe2197b8 ACM |
987 | pr_debug("%s: problems reading %s PLT info.\n", |
988 | __func__, self->long_name); | |
a25e46c4 | 989 | return 0; |
8ce998d6 ACM |
990 | } |
991 | ||
d45868d3 ACM |
992 | static bool elf_sym__is_a(GElf_Sym *self, enum map_type type) |
993 | { | |
994 | switch (type) { | |
995 | case MAP__FUNCTION: | |
996 | return elf_sym__is_function(self); | |
f1dfa0b1 ACM |
997 | case MAP__VARIABLE: |
998 | return elf_sym__is_object(self); | |
d45868d3 ACM |
999 | default: |
1000 | return false; | |
1001 | } | |
1002 | } | |
1003 | ||
1004 | static bool elf_sec__is_a(GElf_Shdr *self, Elf_Data *secstrs, enum map_type type) | |
1005 | { | |
1006 | switch (type) { | |
1007 | case MAP__FUNCTION: | |
1008 | return elf_sec__is_text(self, secstrs); | |
f1dfa0b1 ACM |
1009 | case MAP__VARIABLE: |
1010 | return elf_sec__is_data(self, secstrs); | |
d45868d3 ACM |
1011 | default: |
1012 | return false; | |
1013 | } | |
1014 | } | |
1015 | ||
70c3856b EM |
1016 | static size_t elf_addr_to_index(Elf *elf, GElf_Addr addr) |
1017 | { | |
1018 | Elf_Scn *sec = NULL; | |
1019 | GElf_Shdr shdr; | |
1020 | size_t cnt = 1; | |
1021 | ||
1022 | while ((sec = elf_nextscn(elf, sec)) != NULL) { | |
1023 | gelf_getshdr(sec, &shdr); | |
1024 | ||
1025 | if ((addr >= shdr.sh_addr) && | |
1026 | (addr < (shdr.sh_addr + shdr.sh_size))) | |
1027 | return cnt; | |
1028 | ||
1029 | ++cnt; | |
1030 | } | |
1031 | ||
1032 | return -1; | |
1033 | } | |
1034 | ||
9de89fe7 | 1035 | static int dso__load_sym(struct dso *self, struct map *map, const char *name, |
6da80ce8 DM |
1036 | int fd, symbol_filter_t filter, int kmodule, |
1037 | int want_symtab) | |
a2928c42 | 1038 | { |
9de89fe7 | 1039 | struct kmap *kmap = self->kernel ? map__kmap(map) : NULL; |
2e538c4a ACM |
1040 | struct map *curr_map = map; |
1041 | struct dso *curr_dso = self; | |
6cfcc53e | 1042 | Elf_Data *symstrs, *secstrs; |
a2928c42 ACM |
1043 | uint32_t nr_syms; |
1044 | int err = -1; | |
83a0944f | 1045 | uint32_t idx; |
a2928c42 | 1046 | GElf_Ehdr ehdr; |
70c3856b EM |
1047 | GElf_Shdr shdr, opdshdr; |
1048 | Elf_Data *syms, *opddata = NULL; | |
a2928c42 | 1049 | GElf_Sym sym; |
70c3856b | 1050 | Elf_Scn *sec, *sec_strndx, *opdsec; |
a2928c42 | 1051 | Elf *elf; |
439d473b | 1052 | int nr = 0; |
70c3856b | 1053 | size_t opdidx = 0; |
a2928c42 | 1054 | |
84087126 | 1055 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a2928c42 | 1056 | if (elf == NULL) { |
8b1389ef | 1057 | pr_debug("%s: cannot read %s ELF file.\n", __func__, name); |
a2928c42 ACM |
1058 | goto out_close; |
1059 | } | |
1060 | ||
1061 | if (gelf_getehdr(elf, &ehdr) == NULL) { | |
8b1389ef | 1062 | pr_debug("%s: cannot get elf header.\n", __func__); |
a2928c42 ACM |
1063 | goto out_elf_end; |
1064 | } | |
1065 | ||
6da80ce8 | 1066 | /* Always reject images with a mismatched build-id: */ |
21916c38 DM |
1067 | if (self->has_build_id) { |
1068 | u8 build_id[BUILD_ID_SIZE]; | |
1069 | ||
1070 | if (elf_read_build_id(elf, build_id, | |
1071 | BUILD_ID_SIZE) != BUILD_ID_SIZE) | |
1072 | goto out_elf_end; | |
1073 | ||
1074 | if (!dso__build_id_equal(self, build_id)) | |
1075 | goto out_elf_end; | |
1076 | } | |
1077 | ||
a2928c42 | 1078 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL); |
8ce998d6 | 1079 | if (sec == NULL) { |
6da80ce8 DM |
1080 | if (want_symtab) |
1081 | goto out_elf_end; | |
1082 | ||
a25e46c4 ACM |
1083 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL); |
1084 | if (sec == NULL) | |
8ce998d6 | 1085 | goto out_elf_end; |
8ce998d6 | 1086 | } |
a2928c42 | 1087 | |
70c3856b EM |
1088 | opdsec = elf_section_by_name(elf, &ehdr, &opdshdr, ".opd", &opdidx); |
1089 | if (opdsec) | |
1090 | opddata = elf_rawdata(opdsec, NULL); | |
1091 | ||
a2928c42 ACM |
1092 | syms = elf_getdata(sec, NULL); |
1093 | if (syms == NULL) | |
1094 | goto out_elf_end; | |
1095 | ||
1096 | sec = elf_getscn(elf, shdr.sh_link); | |
1097 | if (sec == NULL) | |
1098 | goto out_elf_end; | |
1099 | ||
1100 | symstrs = elf_getdata(sec, NULL); | |
1101 | if (symstrs == NULL) | |
1102 | goto out_elf_end; | |
1103 | ||
6cfcc53e MG |
1104 | sec_strndx = elf_getscn(elf, ehdr.e_shstrndx); |
1105 | if (sec_strndx == NULL) | |
1106 | goto out_elf_end; | |
1107 | ||
1108 | secstrs = elf_getdata(sec_strndx, NULL); | |
9b30a26b | 1109 | if (secstrs == NULL) |
6cfcc53e MG |
1110 | goto out_elf_end; |
1111 | ||
a2928c42 ACM |
1112 | nr_syms = shdr.sh_size / shdr.sh_entsize; |
1113 | ||
e9fbc9dc | 1114 | memset(&sym, 0, sizeof(sym)); |
a1645ce1 | 1115 | if (self->kernel == DSO_TYPE_USER) { |
d20ff6bd | 1116 | self->adjust_symbols = (ehdr.e_type == ET_EXEC || |
30d7a77d ACM |
1117 | elf_section_by_name(elf, &ehdr, &shdr, |
1118 | ".gnu.prelink_undo", | |
1119 | NULL) != NULL); | |
d20ff6bd MG |
1120 | } else self->adjust_symbols = 0; |
1121 | ||
83a0944f | 1122 | elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) { |
a2928c42 | 1123 | struct symbol *f; |
56b03f3c | 1124 | const char *elf_name = elf_sym__name(&sym, symstrs); |
2e538c4a | 1125 | char *demangled = NULL; |
6cfcc53e MG |
1126 | int is_label = elf_sym__is_label(&sym); |
1127 | const char *section_name; | |
a2928c42 | 1128 | |
9de89fe7 ACM |
1129 | if (kmap && kmap->ref_reloc_sym && kmap->ref_reloc_sym->name && |
1130 | strcmp(elf_name, kmap->ref_reloc_sym->name) == 0) | |
1131 | kmap->ref_reloc_sym->unrelocated_addr = sym.st_value; | |
56b03f3c | 1132 | |
d45868d3 | 1133 | if (!is_label && !elf_sym__is_a(&sym, map->type)) |
a2928c42 ACM |
1134 | continue; |
1135 | ||
696b97a5 DM |
1136 | /* Reject ARM ELF "mapping symbols": these aren't unique and |
1137 | * don't identify functions, so will confuse the profile | |
1138 | * output: */ | |
1139 | if (ehdr.e_machine == EM_ARM) { | |
1140 | if (!strcmp(elf_name, "$a") || | |
1141 | !strcmp(elf_name, "$d") || | |
1142 | !strcmp(elf_name, "$t")) | |
1143 | continue; | |
1144 | } | |
1145 | ||
70c3856b EM |
1146 | if (opdsec && sym.st_shndx == opdidx) { |
1147 | u32 offset = sym.st_value - opdshdr.sh_addr; | |
1148 | u64 *opd = opddata->d_buf + offset; | |
1149 | sym.st_value = *opd; | |
1150 | sym.st_shndx = elf_addr_to_index(elf, sym.st_value); | |
1151 | } | |
1152 | ||
a2928c42 ACM |
1153 | sec = elf_getscn(elf, sym.st_shndx); |
1154 | if (!sec) | |
1155 | goto out_elf_end; | |
1156 | ||
1157 | gelf_getshdr(sec, &shdr); | |
6cfcc53e | 1158 | |
d45868d3 | 1159 | if (is_label && !elf_sec__is_a(&shdr, secstrs, map->type)) |
6cfcc53e MG |
1160 | continue; |
1161 | ||
1162 | section_name = elf_sec__name(&shdr, secstrs); | |
0b73da3f | 1163 | |
b2f8fb23 DDAG |
1164 | /* On ARM, symbols for thumb functions have 1 added to |
1165 | * the symbol address as a flag - remove it */ | |
1166 | if ((ehdr.e_machine == EM_ARM) && | |
1167 | (map->type == MAP__FUNCTION) && | |
1168 | (sym.st_value & 1)) | |
1169 | --sym.st_value; | |
1170 | ||
a1645ce1 | 1171 | if (self->kernel != DSO_TYPE_USER || kmodule) { |
2e538c4a ACM |
1172 | char dso_name[PATH_MAX]; |
1173 | ||
1174 | if (strcmp(section_name, | |
b63be8d7 ACM |
1175 | (curr_dso->short_name + |
1176 | self->short_name_len)) == 0) | |
2e538c4a ACM |
1177 | goto new_symbol; |
1178 | ||
1179 | if (strcmp(section_name, ".text") == 0) { | |
1180 | curr_map = map; | |
1181 | curr_dso = self; | |
1182 | goto new_symbol; | |
1183 | } | |
1184 | ||
1185 | snprintf(dso_name, sizeof(dso_name), | |
1186 | "%s%s", self->short_name, section_name); | |
1187 | ||
9de89fe7 | 1188 | curr_map = map_groups__find_by_name(kmap->kmaps, map->type, dso_name); |
2e538c4a ACM |
1189 | if (curr_map == NULL) { |
1190 | u64 start = sym.st_value; | |
1191 | ||
1192 | if (kmodule) | |
1193 | start += map->start + shdr.sh_offset; | |
1194 | ||
00a192b3 | 1195 | curr_dso = dso__new(dso_name); |
2e538c4a ACM |
1196 | if (curr_dso == NULL) |
1197 | goto out_elf_end; | |
a1645ce1 | 1198 | curr_dso->kernel = self->kernel; |
6c6804fb AL |
1199 | curr_dso->long_name = self->long_name; |
1200 | curr_dso->long_name_len = self->long_name_len; | |
3610583c | 1201 | curr_map = map__new2(start, curr_dso, |
6275ce2d | 1202 | map->type); |
2e538c4a ACM |
1203 | if (curr_map == NULL) { |
1204 | dso__delete(curr_dso); | |
1205 | goto out_elf_end; | |
1206 | } | |
ed52ce2e ACM |
1207 | curr_map->map_ip = identity__map_ip; |
1208 | curr_map->unmap_ip = identity__map_ip; | |
878b439d | 1209 | curr_dso->symtab_type = self->symtab_type; |
9de89fe7 | 1210 | map_groups__insert(kmap->kmaps, curr_map); |
a1645ce1 | 1211 | dsos__add(&self->node, curr_dso); |
6275ce2d | 1212 | dso__set_loaded(curr_dso, map->type); |
2e538c4a ACM |
1213 | } else |
1214 | curr_dso = curr_map->dso; | |
1215 | ||
1216 | goto new_symbol; | |
af427bf5 ACM |
1217 | } |
1218 | ||
2e538c4a | 1219 | if (curr_dso->adjust_symbols) { |
9486aa38 ACM |
1220 | pr_debug4("%s: adjusting symbol: st_value: %#" PRIx64 " " |
1221 | "sh_addr: %#" PRIx64 " sh_offset: %#" PRIx64 "\n", __func__, | |
29a9f66d ACM |
1222 | (u64)sym.st_value, (u64)shdr.sh_addr, |
1223 | (u64)shdr.sh_offset); | |
f5812a7a | 1224 | sym.st_value -= shdr.sh_addr - shdr.sh_offset; |
af427bf5 | 1225 | } |
28ac909b ACM |
1226 | /* |
1227 | * We need to figure out if the object was created from C++ sources | |
1228 | * DWARF DW_compile_unit has this, but we don't always have access | |
1229 | * to it... | |
1230 | */ | |
83a0944f | 1231 | demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI); |
28ac909b | 1232 | if (demangled != NULL) |
83a0944f | 1233 | elf_name = demangled; |
2e538c4a | 1234 | new_symbol: |
c408fedf ACM |
1235 | f = symbol__new(sym.st_value, sym.st_size, |
1236 | GELF_ST_BIND(sym.st_info), elf_name); | |
28ac909b | 1237 | free(demangled); |
a2928c42 ACM |
1238 | if (!f) |
1239 | goto out_elf_end; | |
1240 | ||
2e538c4a | 1241 | if (filter && filter(curr_map, f)) |
00a192b3 | 1242 | symbol__delete(f); |
69ee69f6 | 1243 | else { |
6a4694a4 | 1244 | symbols__insert(&curr_dso->symbols[curr_map->type], f); |
69ee69f6 ACM |
1245 | nr++; |
1246 | } | |
a2928c42 ACM |
1247 | } |
1248 | ||
2e538c4a ACM |
1249 | /* |
1250 | * For misannotated, zeroed, ASM function sizes. | |
1251 | */ | |
6275ce2d | 1252 | if (nr > 0) { |
6a4694a4 | 1253 | symbols__fixup_end(&self->symbols[map->type]); |
6275ce2d ACM |
1254 | if (kmap) { |
1255 | /* | |
1256 | * We need to fixup this here too because we create new | |
1257 | * maps here, for things like vsyscall sections. | |
1258 | */ | |
1259 | __map_groups__fixup_end(kmap->kmaps, map->type); | |
1260 | } | |
1261 | } | |
a2928c42 ACM |
1262 | err = nr; |
1263 | out_elf_end: | |
1264 | elf_end(elf); | |
1265 | out_close: | |
1266 | return err; | |
1267 | } | |
1268 | ||
78075caa ACM |
1269 | static bool dso__build_id_equal(const struct dso *self, u8 *build_id) |
1270 | { | |
1271 | return memcmp(self->build_id, build_id, sizeof(self->build_id)) == 0; | |
1272 | } | |
1273 | ||
a1645ce1 | 1274 | bool __dsos__read_build_ids(struct list_head *head, bool with_hits) |
57f395a7 | 1275 | { |
e30a3d12 | 1276 | bool have_build_id = false; |
57f395a7 FW |
1277 | struct dso *pos; |
1278 | ||
6122e4e4 ACM |
1279 | list_for_each_entry(pos, head, node) { |
1280 | if (with_hits && !pos->hit) | |
1281 | continue; | |
f6e1467d ACM |
1282 | if (pos->has_build_id) { |
1283 | have_build_id = true; | |
1284 | continue; | |
1285 | } | |
e30a3d12 ACM |
1286 | if (filename__read_build_id(pos->long_name, pos->build_id, |
1287 | sizeof(pos->build_id)) > 0) { | |
1288 | have_build_id = true; | |
1289 | pos->has_build_id = true; | |
1290 | } | |
6122e4e4 | 1291 | } |
57f395a7 | 1292 | |
e30a3d12 | 1293 | return have_build_id; |
57f395a7 FW |
1294 | } |
1295 | ||
fd7a346e ACM |
1296 | /* |
1297 | * Align offset to 4 bytes as needed for note name and descriptor data. | |
1298 | */ | |
1299 | #define NOTE_ALIGN(n) (((n) + 3) & -4U) | |
1300 | ||
21916c38 | 1301 | static int elf_read_build_id(Elf *elf, void *bf, size_t size) |
4d1e00a8 | 1302 | { |
21916c38 | 1303 | int err = -1; |
4d1e00a8 ACM |
1304 | GElf_Ehdr ehdr; |
1305 | GElf_Shdr shdr; | |
fd7a346e | 1306 | Elf_Data *data; |
4d1e00a8 | 1307 | Elf_Scn *sec; |
e57cfcda | 1308 | Elf_Kind ek; |
fd7a346e | 1309 | void *ptr; |
4d1e00a8 | 1310 | |
2643ce11 ACM |
1311 | if (size < BUILD_ID_SIZE) |
1312 | goto out; | |
1313 | ||
e57cfcda PE |
1314 | ek = elf_kind(elf); |
1315 | if (ek != ELF_K_ELF) | |
21916c38 | 1316 | goto out; |
e57cfcda | 1317 | |
4d1e00a8 | 1318 | if (gelf_getehdr(elf, &ehdr) == NULL) { |
6beba7ad | 1319 | pr_err("%s: cannot get elf header.\n", __func__); |
21916c38 | 1320 | goto out; |
4d1e00a8 ACM |
1321 | } |
1322 | ||
2643ce11 ACM |
1323 | sec = elf_section_by_name(elf, &ehdr, &shdr, |
1324 | ".note.gnu.build-id", NULL); | |
fd7a346e ACM |
1325 | if (sec == NULL) { |
1326 | sec = elf_section_by_name(elf, &ehdr, &shdr, | |
1327 | ".notes", NULL); | |
1328 | if (sec == NULL) | |
21916c38 | 1329 | goto out; |
fd7a346e | 1330 | } |
4d1e00a8 | 1331 | |
fd7a346e ACM |
1332 | data = elf_getdata(sec, NULL); |
1333 | if (data == NULL) | |
21916c38 | 1334 | goto out; |
fd7a346e ACM |
1335 | |
1336 | ptr = data->d_buf; | |
1337 | while (ptr < (data->d_buf + data->d_size)) { | |
1338 | GElf_Nhdr *nhdr = ptr; | |
1339 | int namesz = NOTE_ALIGN(nhdr->n_namesz), | |
1340 | descsz = NOTE_ALIGN(nhdr->n_descsz); | |
1341 | const char *name; | |
1342 | ||
1343 | ptr += sizeof(*nhdr); | |
1344 | name = ptr; | |
1345 | ptr += namesz; | |
1346 | if (nhdr->n_type == NT_GNU_BUILD_ID && | |
1347 | nhdr->n_namesz == sizeof("GNU")) { | |
1348 | if (memcmp(name, "GNU", sizeof("GNU")) == 0) { | |
1349 | memcpy(bf, ptr, BUILD_ID_SIZE); | |
1350 | err = BUILD_ID_SIZE; | |
1351 | break; | |
1352 | } | |
1353 | } | |
1354 | ptr += descsz; | |
1355 | } | |
21916c38 DM |
1356 | |
1357 | out: | |
1358 | return err; | |
1359 | } | |
1360 | ||
1361 | int filename__read_build_id(const char *filename, void *bf, size_t size) | |
1362 | { | |
1363 | int fd, err = -1; | |
1364 | Elf *elf; | |
1365 | ||
1366 | if (size < BUILD_ID_SIZE) | |
1367 | goto out; | |
1368 | ||
1369 | fd = open(filename, O_RDONLY); | |
1370 | if (fd < 0) | |
1371 | goto out; | |
1372 | ||
1373 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); | |
1374 | if (elf == NULL) { | |
1375 | pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename); | |
1376 | goto out_close; | |
1377 | } | |
1378 | ||
1379 | err = elf_read_build_id(elf, bf, size); | |
1380 | ||
2643ce11 ACM |
1381 | elf_end(elf); |
1382 | out_close: | |
1383 | close(fd); | |
1384 | out: | |
1385 | return err; | |
1386 | } | |
1387 | ||
f1617b40 ACM |
1388 | int sysfs__read_build_id(const char *filename, void *build_id, size_t size) |
1389 | { | |
1390 | int fd, err = -1; | |
1391 | ||
1392 | if (size < BUILD_ID_SIZE) | |
1393 | goto out; | |
1394 | ||
1395 | fd = open(filename, O_RDONLY); | |
1396 | if (fd < 0) | |
1397 | goto out; | |
1398 | ||
1399 | while (1) { | |
1400 | char bf[BUFSIZ]; | |
1401 | GElf_Nhdr nhdr; | |
1402 | int namesz, descsz; | |
1403 | ||
1404 | if (read(fd, &nhdr, sizeof(nhdr)) != sizeof(nhdr)) | |
1405 | break; | |
1406 | ||
fd7a346e ACM |
1407 | namesz = NOTE_ALIGN(nhdr.n_namesz); |
1408 | descsz = NOTE_ALIGN(nhdr.n_descsz); | |
f1617b40 ACM |
1409 | if (nhdr.n_type == NT_GNU_BUILD_ID && |
1410 | nhdr.n_namesz == sizeof("GNU")) { | |
1411 | if (read(fd, bf, namesz) != namesz) | |
1412 | break; | |
1413 | if (memcmp(bf, "GNU", sizeof("GNU")) == 0) { | |
1414 | if (read(fd, build_id, | |
1415 | BUILD_ID_SIZE) == BUILD_ID_SIZE) { | |
1416 | err = 0; | |
1417 | break; | |
1418 | } | |
1419 | } else if (read(fd, bf, descsz) != descsz) | |
1420 | break; | |
1421 | } else { | |
1422 | int n = namesz + descsz; | |
1423 | if (read(fd, bf, n) != n) | |
1424 | break; | |
1425 | } | |
1426 | } | |
1427 | close(fd); | |
1428 | out: | |
1429 | return err; | |
1430 | } | |
1431 | ||
94cb9e38 ACM |
1432 | char dso__symtab_origin(const struct dso *self) |
1433 | { | |
1434 | static const char origin[] = { | |
878b439d ACM |
1435 | [SYMTAB__KALLSYMS] = 'k', |
1436 | [SYMTAB__JAVA_JIT] = 'j', | |
1437 | [SYMTAB__BUILD_ID_CACHE] = 'B', | |
1438 | [SYMTAB__FEDORA_DEBUGINFO] = 'f', | |
1439 | [SYMTAB__UBUNTU_DEBUGINFO] = 'u', | |
1440 | [SYMTAB__BUILDID_DEBUGINFO] = 'b', | |
1441 | [SYMTAB__SYSTEM_PATH_DSO] = 'd', | |
1442 | [SYMTAB__SYSTEM_PATH_KMODULE] = 'K', | |
1443 | [SYMTAB__GUEST_KALLSYMS] = 'g', | |
1444 | [SYMTAB__GUEST_KMODULE] = 'G', | |
94cb9e38 ACM |
1445 | }; |
1446 | ||
878b439d | 1447 | if (self == NULL || self->symtab_type == SYMTAB__NOT_FOUND) |
94cb9e38 | 1448 | return '!'; |
878b439d | 1449 | return origin[self->symtab_type]; |
94cb9e38 ACM |
1450 | } |
1451 | ||
9de89fe7 | 1452 | int dso__load(struct dso *self, struct map *map, symbol_filter_t filter) |
a2928c42 | 1453 | { |
4d1e00a8 | 1454 | int size = PATH_MAX; |
c338aee8 | 1455 | char *name; |
a2928c42 ACM |
1456 | int ret = -1; |
1457 | int fd; | |
23346f21 | 1458 | struct machine *machine; |
a1645ce1 | 1459 | const char *root_dir; |
6da80ce8 | 1460 | int want_symtab; |
a2928c42 | 1461 | |
3610583c | 1462 | dso__set_loaded(self, map->type); |
66bd8424 | 1463 | |
a1645ce1 | 1464 | if (self->kernel == DSO_TYPE_KERNEL) |
9de89fe7 | 1465 | return dso__load_kernel_sym(self, map, filter); |
a1645ce1 ZY |
1466 | else if (self->kernel == DSO_TYPE_GUEST_KERNEL) |
1467 | return dso__load_guest_kernel_sym(self, map, filter); | |
1468 | ||
23346f21 ACM |
1469 | if (map->groups && map->groups->machine) |
1470 | machine = map->groups->machine; | |
a1645ce1 | 1471 | else |
23346f21 | 1472 | machine = NULL; |
c338aee8 ACM |
1473 | |
1474 | name = malloc(size); | |
a2928c42 ACM |
1475 | if (!name) |
1476 | return -1; | |
1477 | ||
30d7a77d | 1478 | self->adjust_symbols = 0; |
f5812a7a | 1479 | |
94cb9e38 | 1480 | if (strncmp(self->name, "/tmp/perf-", 10) == 0) { |
6beba7ad | 1481 | ret = dso__load_perf_map(self, map, filter); |
878b439d ACM |
1482 | self->symtab_type = ret > 0 ? SYMTAB__JAVA_JIT : |
1483 | SYMTAB__NOT_FOUND; | |
94cb9e38 ACM |
1484 | return ret; |
1485 | } | |
1486 | ||
6da80ce8 DM |
1487 | /* Iterate over candidate debug images. |
1488 | * On the first pass, only load images if they have a full symtab. | |
1489 | * Failing that, do a second pass where we accept .dynsym also | |
1490 | */ | |
60e4b10c ACM |
1491 | want_symtab = 1; |
1492 | restart: | |
1493 | for (self->symtab_type = SYMTAB__BUILD_ID_CACHE; | |
878b439d ACM |
1494 | self->symtab_type != SYMTAB__NOT_FOUND; |
1495 | self->symtab_type++) { | |
1496 | switch (self->symtab_type) { | |
1497 | case SYMTAB__BUILD_ID_CACHE: | |
ec5761ea DA |
1498 | /* skip the locally configured cache if a symfs is given */ |
1499 | if (symbol_conf.symfs[0] || | |
1500 | (dso__build_id_filename(self, name, size) == NULL)) { | |
6da80ce8 | 1501 | continue; |
ec5761ea | 1502 | } |
6da80ce8 | 1503 | break; |
878b439d | 1504 | case SYMTAB__FEDORA_DEBUGINFO: |
ec5761ea DA |
1505 | snprintf(name, size, "%s/usr/lib/debug%s.debug", |
1506 | symbol_conf.symfs, self->long_name); | |
a2928c42 | 1507 | break; |
878b439d | 1508 | case SYMTAB__UBUNTU_DEBUGINFO: |
ec5761ea DA |
1509 | snprintf(name, size, "%s/usr/lib/debug%s", |
1510 | symbol_conf.symfs, self->long_name); | |
a2928c42 | 1511 | break; |
878b439d | 1512 | case SYMTAB__BUILDID_DEBUGINFO: { |
6da80ce8 DM |
1513 | char build_id_hex[BUILD_ID_SIZE * 2 + 1]; |
1514 | ||
1515 | if (!self->has_build_id) | |
1516 | continue; | |
1517 | ||
1518 | build_id__sprintf(self->build_id, | |
1519 | sizeof(self->build_id), | |
1520 | build_id_hex); | |
1521 | snprintf(name, size, | |
ec5761ea DA |
1522 | "%s/usr/lib/debug/.build-id/%.2s/%s.debug", |
1523 | symbol_conf.symfs, build_id_hex, build_id_hex + 2); | |
4d1e00a8 | 1524 | } |
6da80ce8 | 1525 | break; |
878b439d | 1526 | case SYMTAB__SYSTEM_PATH_DSO: |
ec5761ea DA |
1527 | snprintf(name, size, "%s%s", |
1528 | symbol_conf.symfs, self->long_name); | |
a2928c42 | 1529 | break; |
878b439d | 1530 | case SYMTAB__GUEST_KMODULE: |
fb7d0b3c KM |
1531 | if (map->groups && machine) |
1532 | root_dir = machine->root_dir; | |
a1645ce1 ZY |
1533 | else |
1534 | root_dir = ""; | |
ec5761ea DA |
1535 | snprintf(name, size, "%s%s%s", symbol_conf.symfs, |
1536 | root_dir, self->long_name); | |
1537 | break; | |
1538 | ||
878b439d | 1539 | case SYMTAB__SYSTEM_PATH_KMODULE: |
ec5761ea DA |
1540 | snprintf(name, size, "%s%s", symbol_conf.symfs, |
1541 | self->long_name); | |
a1645ce1 | 1542 | break; |
60e4b10c | 1543 | default:; |
a2928c42 | 1544 | } |
6da80ce8 DM |
1545 | |
1546 | /* Name is now the name of the next image to try */ | |
a2928c42 | 1547 | fd = open(name, O_RDONLY); |
6da80ce8 DM |
1548 | if (fd < 0) |
1549 | continue; | |
a2928c42 | 1550 | |
6da80ce8 DM |
1551 | ret = dso__load_sym(self, map, name, fd, filter, 0, |
1552 | want_symtab); | |
1553 | close(fd); | |
a2928c42 | 1554 | |
6da80ce8 DM |
1555 | /* |
1556 | * Some people seem to have debuginfo files _WITHOUT_ debug | |
1557 | * info!?!? | |
1558 | */ | |
1559 | if (!ret) | |
1560 | continue; | |
a2928c42 | 1561 | |
6da80ce8 DM |
1562 | if (ret > 0) { |
1563 | int nr_plt = dso__synthesize_plt_symbols(self, map, filter); | |
1564 | if (nr_plt > 0) | |
1565 | ret += nr_plt; | |
1566 | break; | |
1567 | } | |
a25e46c4 | 1568 | } |
6da80ce8 | 1569 | |
60e4b10c ACM |
1570 | /* |
1571 | * If we wanted a full symtab but no image had one, | |
1572 | * relax our requirements and repeat the search. | |
1573 | */ | |
1574 | if (ret <= 0 && want_symtab) { | |
1575 | want_symtab = 0; | |
1576 | goto restart; | |
1577 | } | |
1578 | ||
a2928c42 | 1579 | free(name); |
1340e6bb ACM |
1580 | if (ret < 0 && strstr(self->name, " (deleted)") != NULL) |
1581 | return 0; | |
a2928c42 ACM |
1582 | return ret; |
1583 | } | |
1584 | ||
79406cd7 ACM |
1585 | struct map *map_groups__find_by_name(struct map_groups *self, |
1586 | enum map_type type, const char *name) | |
439d473b ACM |
1587 | { |
1588 | struct rb_node *nd; | |
1589 | ||
79406cd7 | 1590 | for (nd = rb_first(&self->maps[type]); nd; nd = rb_next(nd)) { |
439d473b ACM |
1591 | struct map *map = rb_entry(nd, struct map, rb_node); |
1592 | ||
b7cece76 | 1593 | if (map->dso && strcmp(map->dso->short_name, name) == 0) |
439d473b ACM |
1594 | return map; |
1595 | } | |
1596 | ||
1597 | return NULL; | |
1598 | } | |
1599 | ||
a1645ce1 ZY |
1600 | static int dso__kernel_module_get_build_id(struct dso *self, |
1601 | const char *root_dir) | |
b7cece76 ACM |
1602 | { |
1603 | char filename[PATH_MAX]; | |
1604 | /* | |
1605 | * kernel module short names are of the form "[module]" and | |
1606 | * we need just "module" here. | |
1607 | */ | |
1608 | const char *name = self->short_name + 1; | |
1609 | ||
1610 | snprintf(filename, sizeof(filename), | |
a1645ce1 ZY |
1611 | "%s/sys/module/%.*s/notes/.note.gnu.build-id", |
1612 | root_dir, (int)strlen(name) - 1, name); | |
b7cece76 ACM |
1613 | |
1614 | if (sysfs__read_build_id(filename, self->build_id, | |
1615 | sizeof(self->build_id)) == 0) | |
1616 | self->has_build_id = true; | |
1617 | ||
1618 | return 0; | |
1619 | } | |
1620 | ||
a1645ce1 ZY |
1621 | static int map_groups__set_modules_path_dir(struct map_groups *self, |
1622 | const char *dir_name) | |
6cfcc53e | 1623 | { |
439d473b | 1624 | struct dirent *dent; |
5aab621b | 1625 | DIR *dir = opendir(dir_name); |
74534341 | 1626 | int ret = 0; |
6cfcc53e | 1627 | |
439d473b | 1628 | if (!dir) { |
5aab621b | 1629 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); |
439d473b ACM |
1630 | return -1; |
1631 | } | |
6cfcc53e | 1632 | |
439d473b ACM |
1633 | while ((dent = readdir(dir)) != NULL) { |
1634 | char path[PATH_MAX]; | |
a1645ce1 ZY |
1635 | struct stat st; |
1636 | ||
1637 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
1638 | sprintf(path, "%s/%s", dir_name, dent->d_name); | |
1639 | if (stat(path, &st)) | |
1640 | continue; | |
439d473b | 1641 | |
a1645ce1 | 1642 | if (S_ISDIR(st.st_mode)) { |
439d473b ACM |
1643 | if (!strcmp(dent->d_name, ".") || |
1644 | !strcmp(dent->d_name, "..")) | |
1645 | continue; | |
1646 | ||
1647 | snprintf(path, sizeof(path), "%s/%s", | |
5aab621b | 1648 | dir_name, dent->d_name); |
74534341 GJ |
1649 | ret = map_groups__set_modules_path_dir(self, path); |
1650 | if (ret < 0) | |
1651 | goto out; | |
439d473b ACM |
1652 | } else { |
1653 | char *dot = strrchr(dent->d_name, '.'), | |
1654 | dso_name[PATH_MAX]; | |
1655 | struct map *map; | |
cfc10d3b | 1656 | char *long_name; |
439d473b ACM |
1657 | |
1658 | if (dot == NULL || strcmp(dot, ".ko")) | |
1659 | continue; | |
1660 | snprintf(dso_name, sizeof(dso_name), "[%.*s]", | |
1661 | (int)(dot - dent->d_name), dent->d_name); | |
1662 | ||
a2a99e8e | 1663 | strxfrchar(dso_name, '-', '_'); |
9de89fe7 | 1664 | map = map_groups__find_by_name(self, MAP__FUNCTION, dso_name); |
439d473b ACM |
1665 | if (map == NULL) |
1666 | continue; | |
1667 | ||
1668 | snprintf(path, sizeof(path), "%s/%s", | |
5aab621b | 1669 | dir_name, dent->d_name); |
439d473b | 1670 | |
cfc10d3b | 1671 | long_name = strdup(path); |
74534341 GJ |
1672 | if (long_name == NULL) { |
1673 | ret = -1; | |
1674 | goto out; | |
1675 | } | |
cfc10d3b | 1676 | dso__set_long_name(map->dso, long_name); |
6e406257 | 1677 | map->dso->lname_alloc = 1; |
a1645ce1 | 1678 | dso__kernel_module_get_build_id(map->dso, ""); |
439d473b | 1679 | } |
439d473b | 1680 | } |
6cfcc53e | 1681 | |
74534341 | 1682 | out: |
439d473b | 1683 | closedir(dir); |
74534341 | 1684 | return ret; |
439d473b | 1685 | } |
6cfcc53e | 1686 | |
a1645ce1 | 1687 | static char *get_kernel_version(const char *root_dir) |
439d473b | 1688 | { |
a1645ce1 ZY |
1689 | char version[PATH_MAX]; |
1690 | FILE *file; | |
1691 | char *name, *tmp; | |
1692 | const char *prefix = "Linux version "; | |
1693 | ||
1694 | sprintf(version, "%s/proc/version", root_dir); | |
1695 | file = fopen(version, "r"); | |
1696 | if (!file) | |
1697 | return NULL; | |
1698 | ||
1699 | version[0] = '\0'; | |
1700 | tmp = fgets(version, sizeof(version), file); | |
1701 | fclose(file); | |
1702 | ||
1703 | name = strstr(version, prefix); | |
1704 | if (!name) | |
1705 | return NULL; | |
1706 | name += strlen(prefix); | |
1707 | tmp = strchr(name, ' '); | |
1708 | if (tmp) | |
1709 | *tmp = '\0'; | |
1710 | ||
1711 | return strdup(name); | |
1712 | } | |
1713 | ||
d28c6223 | 1714 | static int machine__set_modules_path(struct machine *self) |
a1645ce1 ZY |
1715 | { |
1716 | char *version; | |
439d473b | 1717 | char modules_path[PATH_MAX]; |
6cfcc53e | 1718 | |
d28c6223 | 1719 | version = get_kernel_version(self->root_dir); |
a1645ce1 | 1720 | if (!version) |
439d473b | 1721 | return -1; |
6cfcc53e | 1722 | |
a1645ce1 | 1723 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s/kernel", |
d28c6223 | 1724 | self->root_dir, version); |
a1645ce1 | 1725 | free(version); |
6cfcc53e | 1726 | |
d28c6223 | 1727 | return map_groups__set_modules_path_dir(&self->kmaps, modules_path); |
6cfcc53e MG |
1728 | } |
1729 | ||
439d473b ACM |
1730 | /* |
1731 | * Constructor variant for modules (where we know from /proc/modules where | |
1732 | * they are loaded) and for vmlinux, where only after we load all the | |
1733 | * symbols we'll know where it starts and ends. | |
1734 | */ | |
3610583c | 1735 | static struct map *map__new2(u64 start, struct dso *dso, enum map_type type) |
6cfcc53e | 1736 | { |
5aab621b ACM |
1737 | struct map *self = calloc(1, (sizeof(*self) + |
1738 | (dso->kernel ? sizeof(struct kmap) : 0))); | |
439d473b | 1739 | if (self != NULL) { |
439d473b | 1740 | /* |
afb7b4f0 | 1741 | * ->end will be filled after we load all the symbols |
439d473b | 1742 | */ |
3610583c | 1743 | map__init(self, type, start, 0, 0, dso); |
439d473b | 1744 | } |
afb7b4f0 | 1745 | |
439d473b ACM |
1746 | return self; |
1747 | } | |
1748 | ||
d28c6223 ACM |
1749 | struct map *machine__new_module(struct machine *self, u64 start, |
1750 | const char *filename) | |
b7cece76 ACM |
1751 | { |
1752 | struct map *map; | |
d28c6223 | 1753 | struct dso *dso = __dsos__findnew(&self->kernel_dsos, filename); |
b7cece76 ACM |
1754 | |
1755 | if (dso == NULL) | |
1756 | return NULL; | |
1757 | ||
1758 | map = map__new2(start, dso, MAP__FUNCTION); | |
1759 | if (map == NULL) | |
1760 | return NULL; | |
1761 | ||
d28c6223 | 1762 | if (machine__is_host(self)) |
878b439d | 1763 | dso->symtab_type = SYMTAB__SYSTEM_PATH_KMODULE; |
a1645ce1 | 1764 | else |
878b439d | 1765 | dso->symtab_type = SYMTAB__GUEST_KMODULE; |
d28c6223 | 1766 | map_groups__insert(&self->kmaps, map); |
b7cece76 ACM |
1767 | return map; |
1768 | } | |
1769 | ||
d28c6223 | 1770 | static int machine__create_modules(struct machine *self) |
439d473b ACM |
1771 | { |
1772 | char *line = NULL; | |
1773 | size_t n; | |
a1645ce1 | 1774 | FILE *file; |
439d473b | 1775 | struct map *map; |
a1645ce1 ZY |
1776 | const char *modules; |
1777 | char path[PATH_MAX]; | |
1778 | ||
d28c6223 | 1779 | if (machine__is_default_guest(self)) |
a1645ce1 ZY |
1780 | modules = symbol_conf.default_guest_modules; |
1781 | else { | |
d28c6223 | 1782 | sprintf(path, "%s/proc/modules", self->root_dir); |
a1645ce1 ZY |
1783 | modules = path; |
1784 | } | |
6cfcc53e | 1785 | |
a1645ce1 | 1786 | file = fopen(modules, "r"); |
439d473b ACM |
1787 | if (file == NULL) |
1788 | return -1; | |
6cfcc53e | 1789 | |
439d473b ACM |
1790 | while (!feof(file)) { |
1791 | char name[PATH_MAX]; | |
1792 | u64 start; | |
439d473b ACM |
1793 | char *sep; |
1794 | int line_len; | |
6cfcc53e | 1795 | |
439d473b ACM |
1796 | line_len = getline(&line, &n, file); |
1797 | if (line_len < 0) | |
1798 | break; | |
1799 | ||
1800 | if (!line) | |
1801 | goto out_failure; | |
1802 | ||
1803 | line[--line_len] = '\0'; /* \n */ | |
1804 | ||
1805 | sep = strrchr(line, 'x'); | |
1806 | if (sep == NULL) | |
1807 | continue; | |
1808 | ||
1809 | hex2u64(sep + 1, &start); | |
1810 | ||
1811 | sep = strchr(line, ' '); | |
1812 | if (sep == NULL) | |
1813 | continue; | |
1814 | ||
1815 | *sep = '\0'; | |
1816 | ||
1817 | snprintf(name, sizeof(name), "[%s]", line); | |
d28c6223 | 1818 | map = machine__new_module(self, start, name); |
b7cece76 | 1819 | if (map == NULL) |
439d473b | 1820 | goto out_delete_line; |
d28c6223 | 1821 | dso__kernel_module_get_build_id(map->dso, self->root_dir); |
6cfcc53e | 1822 | } |
439d473b ACM |
1823 | |
1824 | free(line); | |
1825 | fclose(file); | |
1826 | ||
d28c6223 | 1827 | return machine__set_modules_path(self); |
439d473b ACM |
1828 | |
1829 | out_delete_line: | |
1830 | free(line); | |
1831 | out_failure: | |
1832 | return -1; | |
6cfcc53e MG |
1833 | } |
1834 | ||
fd930ff9 FBH |
1835 | int dso__load_vmlinux(struct dso *self, struct map *map, |
1836 | const char *vmlinux, symbol_filter_t filter) | |
a2928c42 | 1837 | { |
fbd733b8 | 1838 | int err = -1, fd; |
ec5761ea | 1839 | char symfs_vmlinux[PATH_MAX]; |
a2928c42 | 1840 | |
a639dc64 | 1841 | snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s%s", |
ec5761ea DA |
1842 | symbol_conf.symfs, vmlinux); |
1843 | fd = open(symfs_vmlinux, O_RDONLY); | |
a2928c42 ACM |
1844 | if (fd < 0) |
1845 | return -1; | |
1846 | ||
6c6804fb | 1847 | dso__set_long_name(self, (char *)vmlinux); |
3610583c | 1848 | dso__set_loaded(self, map->type); |
ec5761ea | 1849 | err = dso__load_sym(self, map, symfs_vmlinux, fd, filter, 0, 0); |
a2928c42 ACM |
1850 | close(fd); |
1851 | ||
3846df2e | 1852 | if (err > 0) |
ec5761ea | 1853 | pr_debug("Using %s for symbols\n", symfs_vmlinux); |
3846df2e | 1854 | |
a2928c42 ACM |
1855 | return err; |
1856 | } | |
1857 | ||
a19afe46 | 1858 | int dso__load_vmlinux_path(struct dso *self, struct map *map, |
9de89fe7 | 1859 | symbol_filter_t filter) |
a19afe46 ACM |
1860 | { |
1861 | int i, err = 0; | |
5ad90e4e | 1862 | char *filename; |
a19afe46 ACM |
1863 | |
1864 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", | |
5ad90e4e ACM |
1865 | vmlinux_path__nr_entries + 1); |
1866 | ||
1867 | filename = dso__build_id_filename(self, NULL, 0); | |
1868 | if (filename != NULL) { | |
1869 | err = dso__load_vmlinux(self, map, filename, filter); | |
1870 | if (err > 0) { | |
1871 | dso__set_long_name(self, filename); | |
1872 | goto out; | |
1873 | } | |
1874 | free(filename); | |
1875 | } | |
a19afe46 ACM |
1876 | |
1877 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { | |
9de89fe7 | 1878 | err = dso__load_vmlinux(self, map, vmlinux_path[i], filter); |
a19afe46 | 1879 | if (err > 0) { |
a19afe46 ACM |
1880 | dso__set_long_name(self, strdup(vmlinux_path[i])); |
1881 | break; | |
1882 | } | |
1883 | } | |
5ad90e4e | 1884 | out: |
a19afe46 ACM |
1885 | return err; |
1886 | } | |
1887 | ||
c338aee8 | 1888 | static int dso__load_kernel_sym(struct dso *self, struct map *map, |
9de89fe7 | 1889 | symbol_filter_t filter) |
a827c875 | 1890 | { |
cc612d81 | 1891 | int err; |
9e201442 ACM |
1892 | const char *kallsyms_filename = NULL; |
1893 | char *kallsyms_allocated_filename = NULL; | |
dc8d6ab2 | 1894 | /* |
b226a5a7 DA |
1895 | * Step 1: if the user specified a kallsyms or vmlinux filename, use |
1896 | * it and only it, reporting errors to the user if it cannot be used. | |
dc8d6ab2 ACM |
1897 | * |
1898 | * For instance, try to analyse an ARM perf.data file _without_ a | |
1899 | * build-id, or if the user specifies the wrong path to the right | |
1900 | * vmlinux file, obviously we can't fallback to another vmlinux (a | |
1901 | * x86_86 one, on the machine where analysis is being performed, say), | |
1902 | * or worse, /proc/kallsyms. | |
1903 | * | |
1904 | * If the specified file _has_ a build-id and there is a build-id | |
1905 | * section in the perf.data file, we will still do the expected | |
1906 | * validation in dso__load_vmlinux and will bail out if they don't | |
1907 | * match. | |
1908 | */ | |
b226a5a7 DA |
1909 | if (symbol_conf.kallsyms_name != NULL) { |
1910 | kallsyms_filename = symbol_conf.kallsyms_name; | |
1911 | goto do_kallsyms; | |
1912 | } | |
1913 | ||
dc8d6ab2 | 1914 | if (symbol_conf.vmlinux_name != NULL) { |
9de89fe7 | 1915 | err = dso__load_vmlinux(self, map, |
dc8d6ab2 | 1916 | symbol_conf.vmlinux_name, filter); |
e7dadc00 ACM |
1917 | if (err > 0) { |
1918 | dso__set_long_name(self, | |
1919 | strdup(symbol_conf.vmlinux_name)); | |
1920 | goto out_fixup; | |
1921 | } | |
1922 | return err; | |
dc8d6ab2 | 1923 | } |
cc612d81 ACM |
1924 | |
1925 | if (vmlinux_path != NULL) { | |
9de89fe7 | 1926 | err = dso__load_vmlinux_path(self, map, filter); |
a19afe46 ACM |
1927 | if (err > 0) |
1928 | goto out_fixup; | |
cc612d81 ACM |
1929 | } |
1930 | ||
ec5761ea DA |
1931 | /* do not try local files if a symfs was given */ |
1932 | if (symbol_conf.symfs[0] != 0) | |
1933 | return -1; | |
1934 | ||
b7cece76 ACM |
1935 | /* |
1936 | * Say the kernel DSO was created when processing the build-id header table, | |
1937 | * we have a build-id, so check if it is the same as the running kernel, | |
1938 | * using it if it is. | |
1939 | */ | |
1940 | if (self->has_build_id) { | |
1941 | u8 kallsyms_build_id[BUILD_ID_SIZE]; | |
9e201442 | 1942 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; |
b7cece76 ACM |
1943 | |
1944 | if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id, | |
8d0591f6 | 1945 | sizeof(kallsyms_build_id)) == 0) { |
9e201442 ACM |
1946 | if (dso__build_id_equal(self, kallsyms_build_id)) { |
1947 | kallsyms_filename = "/proc/kallsyms"; | |
8d0591f6 | 1948 | goto do_kallsyms; |
9e201442 | 1949 | } |
8d0591f6 | 1950 | } |
dc8d6ab2 ACM |
1951 | /* |
1952 | * Now look if we have it on the build-id cache in | |
1953 | * $HOME/.debug/[kernel.kallsyms]. | |
1954 | */ | |
9e201442 ACM |
1955 | build_id__sprintf(self->build_id, sizeof(self->build_id), |
1956 | sbuild_id); | |
1957 | ||
1958 | if (asprintf(&kallsyms_allocated_filename, | |
1959 | "%s/.debug/[kernel.kallsyms]/%s", | |
3846df2e ACM |
1960 | getenv("HOME"), sbuild_id) == -1) { |
1961 | pr_err("Not enough memory for kallsyms file lookup\n"); | |
dc8d6ab2 | 1962 | return -1; |
3846df2e | 1963 | } |
dc8d6ab2 | 1964 | |
19fc2ded ACM |
1965 | kallsyms_filename = kallsyms_allocated_filename; |
1966 | ||
dc8d6ab2 | 1967 | if (access(kallsyms_filename, F_OK)) { |
3846df2e ACM |
1968 | pr_err("No kallsyms or vmlinux with build-id %s " |
1969 | "was found\n", sbuild_id); | |
9e201442 | 1970 | free(kallsyms_allocated_filename); |
dc8d6ab2 | 1971 | return -1; |
9e201442 | 1972 | } |
dc8d6ab2 ACM |
1973 | } else { |
1974 | /* | |
1975 | * Last resort, if we don't have a build-id and couldn't find | |
1976 | * any vmlinux file, try the running kernel kallsyms table. | |
1977 | */ | |
9e201442 | 1978 | kallsyms_filename = "/proc/kallsyms"; |
9e201442 | 1979 | } |
439d473b | 1980 | |
cc612d81 | 1981 | do_kallsyms: |
9de89fe7 | 1982 | err = dso__load_kallsyms(self, kallsyms_filename, map, filter); |
3846df2e ACM |
1983 | if (err > 0) |
1984 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
dc8d6ab2 | 1985 | free(kallsyms_allocated_filename); |
439d473b ACM |
1986 | |
1987 | if (err > 0) { | |
cc612d81 | 1988 | out_fixup: |
e1c7c6a4 | 1989 | if (kallsyms_filename != NULL) |
dc8d6ab2 | 1990 | dso__set_long_name(self, strdup("[kernel.kallsyms]")); |
6a4694a4 ACM |
1991 | map__fixup_start(map); |
1992 | map__fixup_end(map); | |
439d473b | 1993 | } |
94cb9e38 | 1994 | |
a827c875 ACM |
1995 | return err; |
1996 | } | |
1997 | ||
a1645ce1 ZY |
1998 | static int dso__load_guest_kernel_sym(struct dso *self, struct map *map, |
1999 | symbol_filter_t filter) | |
2000 | { | |
2001 | int err; | |
2002 | const char *kallsyms_filename = NULL; | |
23346f21 | 2003 | struct machine *machine; |
a1645ce1 ZY |
2004 | char path[PATH_MAX]; |
2005 | ||
2006 | if (!map->groups) { | |
2007 | pr_debug("Guest kernel map hasn't the point to groups\n"); | |
2008 | return -1; | |
2009 | } | |
23346f21 | 2010 | machine = map->groups->machine; |
a1645ce1 | 2011 | |
23346f21 | 2012 | if (machine__is_default_guest(machine)) { |
a1645ce1 ZY |
2013 | /* |
2014 | * if the user specified a vmlinux filename, use it and only | |
2015 | * it, reporting errors to the user if it cannot be used. | |
2016 | * Or use file guest_kallsyms inputted by user on commandline | |
2017 | */ | |
2018 | if (symbol_conf.default_guest_vmlinux_name != NULL) { | |
2019 | err = dso__load_vmlinux(self, map, | |
2020 | symbol_conf.default_guest_vmlinux_name, filter); | |
2021 | goto out_try_fixup; | |
2022 | } | |
2023 | ||
2024 | kallsyms_filename = symbol_conf.default_guest_kallsyms; | |
2025 | if (!kallsyms_filename) | |
2026 | return -1; | |
2027 | } else { | |
23346f21 | 2028 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); |
a1645ce1 ZY |
2029 | kallsyms_filename = path; |
2030 | } | |
2031 | ||
2032 | err = dso__load_kallsyms(self, kallsyms_filename, map, filter); | |
2033 | if (err > 0) | |
2034 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
2035 | ||
2036 | out_try_fixup: | |
2037 | if (err > 0) { | |
2038 | if (kallsyms_filename != NULL) { | |
48ea8f54 | 2039 | machine__mmap_name(machine, path, sizeof(path)); |
23346f21 | 2040 | dso__set_long_name(self, strdup(path)); |
a1645ce1 ZY |
2041 | } |
2042 | map__fixup_start(map); | |
2043 | map__fixup_end(map); | |
2044 | } | |
2045 | ||
2046 | return err; | |
2047 | } | |
cd84c2ac | 2048 | |
b0da954a | 2049 | static void dsos__add(struct list_head *head, struct dso *dso) |
cd84c2ac | 2050 | { |
b0da954a | 2051 | list_add_tail(&dso->node, head); |
cd84c2ac FW |
2052 | } |
2053 | ||
b0da954a | 2054 | static struct dso *dsos__find(struct list_head *head, const char *name) |
cd84c2ac FW |
2055 | { |
2056 | struct dso *pos; | |
2057 | ||
b0da954a | 2058 | list_for_each_entry(pos, head, node) |
cf4e5b08 | 2059 | if (strcmp(pos->long_name, name) == 0) |
cd84c2ac FW |
2060 | return pos; |
2061 | return NULL; | |
2062 | } | |
2063 | ||
a89e5abe | 2064 | struct dso *__dsos__findnew(struct list_head *head, const char *name) |
cd84c2ac | 2065 | { |
a89e5abe | 2066 | struct dso *dso = dsos__find(head, name); |
cd84c2ac | 2067 | |
e4204992 | 2068 | if (!dso) { |
00a192b3 | 2069 | dso = dso__new(name); |
cfc10d3b | 2070 | if (dso != NULL) { |
a89e5abe | 2071 | dsos__add(head, dso); |
cfc10d3b ACM |
2072 | dso__set_basename(dso); |
2073 | } | |
66bd8424 | 2074 | } |
cd84c2ac FW |
2075 | |
2076 | return dso; | |
cd84c2ac FW |
2077 | } |
2078 | ||
1f626bc3 | 2079 | size_t __dsos__fprintf(struct list_head *head, FILE *fp) |
cd84c2ac FW |
2080 | { |
2081 | struct dso *pos; | |
cbf69680 | 2082 | size_t ret = 0; |
cd84c2ac | 2083 | |
95011c60 ACM |
2084 | list_for_each_entry(pos, head, node) { |
2085 | int i; | |
2086 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
cbf69680 | 2087 | ret += dso__fprintf(pos, i, fp); |
95011c60 | 2088 | } |
cbf69680 ACM |
2089 | |
2090 | return ret; | |
cd84c2ac FW |
2091 | } |
2092 | ||
cbf69680 | 2093 | size_t machines__fprintf_dsos(struct rb_root *self, FILE *fp) |
b0da954a | 2094 | { |
a1645ce1 | 2095 | struct rb_node *nd; |
cbf69680 | 2096 | size_t ret = 0; |
a1645ce1 | 2097 | |
cbf69680 | 2098 | for (nd = rb_first(self); nd; nd = rb_next(nd)) { |
23346f21 | 2099 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
cbf69680 ACM |
2100 | ret += __dsos__fprintf(&pos->kernel_dsos, fp); |
2101 | ret += __dsos__fprintf(&pos->user_dsos, fp); | |
a1645ce1 | 2102 | } |
cbf69680 ACM |
2103 | |
2104 | return ret; | |
b0da954a ACM |
2105 | } |
2106 | ||
88d3d9b7 ACM |
2107 | static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp, |
2108 | bool with_hits) | |
9e03eb2d ACM |
2109 | { |
2110 | struct dso *pos; | |
2111 | size_t ret = 0; | |
2112 | ||
b0da954a | 2113 | list_for_each_entry(pos, head, node) { |
88d3d9b7 ACM |
2114 | if (with_hits && !pos->hit) |
2115 | continue; | |
9e03eb2d | 2116 | ret += dso__fprintf_buildid(pos, fp); |
1124ba73 | 2117 | ret += fprintf(fp, " %s\n", pos->long_name); |
9e03eb2d ACM |
2118 | } |
2119 | return ret; | |
2120 | } | |
2121 | ||
f869097e ACM |
2122 | size_t machine__fprintf_dsos_buildid(struct machine *self, FILE *fp, bool with_hits) |
2123 | { | |
2124 | return __dsos__fprintf_buildid(&self->kernel_dsos, fp, with_hits) + | |
2125 | __dsos__fprintf_buildid(&self->user_dsos, fp, with_hits); | |
2126 | } | |
2127 | ||
cbf69680 | 2128 | size_t machines__fprintf_dsos_buildid(struct rb_root *self, FILE *fp, bool with_hits) |
b0da954a | 2129 | { |
a1645ce1 ZY |
2130 | struct rb_node *nd; |
2131 | size_t ret = 0; | |
2132 | ||
cbf69680 | 2133 | for (nd = rb_first(self); nd; nd = rb_next(nd)) { |
23346f21 | 2134 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
f869097e | 2135 | ret += machine__fprintf_dsos_buildid(pos, fp, with_hits); |
a1645ce1 ZY |
2136 | } |
2137 | return ret; | |
b0da954a ACM |
2138 | } |
2139 | ||
fd1d908c ACM |
2140 | struct dso *dso__new_kernel(const char *name) |
2141 | { | |
2142 | struct dso *self = dso__new(name ?: "[kernel.kallsyms]"); | |
2143 | ||
2144 | if (self != NULL) { | |
b63be8d7 | 2145 | dso__set_short_name(self, "[kernel]"); |
a1645ce1 ZY |
2146 | self->kernel = DSO_TYPE_KERNEL; |
2147 | } | |
2148 | ||
2149 | return self; | |
2150 | } | |
2151 | ||
23346f21 | 2152 | static struct dso *dso__new_guest_kernel(struct machine *machine, |
a1645ce1 ZY |
2153 | const char *name) |
2154 | { | |
48ea8f54 ACM |
2155 | char bf[PATH_MAX]; |
2156 | struct dso *self = dso__new(name ?: machine__mmap_name(machine, bf, sizeof(bf))); | |
a1645ce1 | 2157 | |
a1645ce1 ZY |
2158 | if (self != NULL) { |
2159 | dso__set_short_name(self, "[guest.kernel]"); | |
2160 | self->kernel = DSO_TYPE_GUEST_KERNEL; | |
fd1d908c ACM |
2161 | } |
2162 | ||
2163 | return self; | |
2164 | } | |
2165 | ||
23346f21 | 2166 | void dso__read_running_kernel_build_id(struct dso *self, struct machine *machine) |
fd1d908c | 2167 | { |
a1645ce1 ZY |
2168 | char path[PATH_MAX]; |
2169 | ||
23346f21 | 2170 | if (machine__is_default_guest(machine)) |
a1645ce1 | 2171 | return; |
23346f21 | 2172 | sprintf(path, "%s/sys/kernel/notes", machine->root_dir); |
a1645ce1 | 2173 | if (sysfs__read_build_id(path, self->build_id, |
fd1d908c ACM |
2174 | sizeof(self->build_id)) == 0) |
2175 | self->has_build_id = true; | |
2176 | } | |
2177 | ||
5c0541d5 | 2178 | static struct dso *machine__create_kernel(struct machine *self) |
cd84c2ac | 2179 | { |
a1645ce1 ZY |
2180 | const char *vmlinux_name = NULL; |
2181 | struct dso *kernel; | |
cd84c2ac | 2182 | |
5c0541d5 | 2183 | if (machine__is_host(self)) { |
a1645ce1 ZY |
2184 | vmlinux_name = symbol_conf.vmlinux_name; |
2185 | kernel = dso__new_kernel(vmlinux_name); | |
2186 | } else { | |
5c0541d5 | 2187 | if (machine__is_default_guest(self)) |
a1645ce1 | 2188 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; |
5c0541d5 | 2189 | kernel = dso__new_guest_kernel(self, vmlinux_name); |
8d92c02a | 2190 | } |
cd84c2ac | 2191 | |
a1645ce1 | 2192 | if (kernel != NULL) { |
5c0541d5 ACM |
2193 | dso__read_running_kernel_build_id(kernel, self); |
2194 | dsos__add(&self->kernel_dsos, kernel); | |
a1645ce1 | 2195 | } |
f1dfa0b1 | 2196 | return kernel; |
f1dfa0b1 ACM |
2197 | } |
2198 | ||
d214afbd ML |
2199 | struct process_args { |
2200 | u64 start; | |
2201 | }; | |
2202 | ||
2203 | static int symbol__in_kernel(void *arg, const char *name, | |
3b01a413 | 2204 | char type __used, u64 start, u64 end __used) |
d214afbd ML |
2205 | { |
2206 | struct process_args *args = arg; | |
2207 | ||
2208 | if (strchr(name, '[')) | |
2209 | return 0; | |
2210 | ||
2211 | args->start = start; | |
2212 | return 1; | |
2213 | } | |
2214 | ||
2215 | /* Figure out the start address of kernel map from /proc/kallsyms */ | |
2216 | static u64 machine__get_kernel_start_addr(struct machine *machine) | |
2217 | { | |
2218 | const char *filename; | |
2219 | char path[PATH_MAX]; | |
2220 | struct process_args args; | |
2221 | ||
2222 | if (machine__is_host(machine)) { | |
2223 | filename = "/proc/kallsyms"; | |
2224 | } else { | |
2225 | if (machine__is_default_guest(machine)) | |
2226 | filename = (char *)symbol_conf.default_guest_kallsyms; | |
2227 | else { | |
2228 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); | |
2229 | filename = path; | |
2230 | } | |
2231 | } | |
2232 | ||
2233 | if (kallsyms__parse(filename, &args, symbol__in_kernel) <= 0) | |
2234 | return 0; | |
2235 | ||
2236 | return args.start; | |
2237 | } | |
2238 | ||
d28c6223 | 2239 | int __machine__create_kernel_maps(struct machine *self, struct dso *kernel) |
f1dfa0b1 | 2240 | { |
de176489 | 2241 | enum map_type type; |
d214afbd | 2242 | u64 start = machine__get_kernel_start_addr(self); |
f1dfa0b1 | 2243 | |
de176489 | 2244 | for (type = 0; type < MAP__NR_TYPES; ++type) { |
9de89fe7 ACM |
2245 | struct kmap *kmap; |
2246 | ||
d214afbd | 2247 | self->vmlinux_maps[type] = map__new2(start, kernel, type); |
d28c6223 | 2248 | if (self->vmlinux_maps[type] == NULL) |
de176489 | 2249 | return -1; |
f1dfa0b1 | 2250 | |
d28c6223 ACM |
2251 | self->vmlinux_maps[type]->map_ip = |
2252 | self->vmlinux_maps[type]->unmap_ip = identity__map_ip; | |
9de89fe7 | 2253 | |
d28c6223 ACM |
2254 | kmap = map__kmap(self->vmlinux_maps[type]); |
2255 | kmap->kmaps = &self->kmaps; | |
2256 | map_groups__insert(&self->kmaps, self->vmlinux_maps[type]); | |
f1dfa0b1 ACM |
2257 | } |
2258 | ||
f1dfa0b1 | 2259 | return 0; |
2446042c ACM |
2260 | } |
2261 | ||
076c6e45 ACM |
2262 | void machine__destroy_kernel_maps(struct machine *self) |
2263 | { | |
2264 | enum map_type type; | |
2265 | ||
2266 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
2267 | struct kmap *kmap; | |
2268 | ||
2269 | if (self->vmlinux_maps[type] == NULL) | |
2270 | continue; | |
2271 | ||
2272 | kmap = map__kmap(self->vmlinux_maps[type]); | |
2273 | map_groups__remove(&self->kmaps, self->vmlinux_maps[type]); | |
2274 | if (kmap->ref_reloc_sym) { | |
2275 | /* | |
2276 | * ref_reloc_sym is shared among all maps, so free just | |
2277 | * on one of them. | |
2278 | */ | |
2279 | if (type == MAP__FUNCTION) { | |
2280 | free((char *)kmap->ref_reloc_sym->name); | |
2281 | kmap->ref_reloc_sym->name = NULL; | |
2282 | free(kmap->ref_reloc_sym); | |
2283 | } | |
2284 | kmap->ref_reloc_sym = NULL; | |
2285 | } | |
2286 | ||
2287 | map__delete(self->vmlinux_maps[type]); | |
2288 | self->vmlinux_maps[type] = NULL; | |
2289 | } | |
2290 | } | |
2291 | ||
5c0541d5 ACM |
2292 | int machine__create_kernel_maps(struct machine *self) |
2293 | { | |
2294 | struct dso *kernel = machine__create_kernel(self); | |
2295 | ||
2296 | if (kernel == NULL || | |
2297 | __machine__create_kernel_maps(self, kernel) < 0) | |
2298 | return -1; | |
2299 | ||
2300 | if (symbol_conf.use_modules && machine__create_modules(self) < 0) | |
2301 | pr_debug("Problems creating module maps, continuing anyway...\n"); | |
2302 | /* | |
2303 | * Now that we have all the maps created, just set the ->end of them: | |
2304 | */ | |
2305 | map_groups__fixup_end(&self->kmaps); | |
2306 | return 0; | |
2307 | } | |
2308 | ||
cc612d81 ACM |
2309 | static void vmlinux_path__exit(void) |
2310 | { | |
2311 | while (--vmlinux_path__nr_entries >= 0) { | |
2312 | free(vmlinux_path[vmlinux_path__nr_entries]); | |
2313 | vmlinux_path[vmlinux_path__nr_entries] = NULL; | |
2314 | } | |
2315 | ||
2316 | free(vmlinux_path); | |
2317 | vmlinux_path = NULL; | |
2318 | } | |
2319 | ||
2320 | static int vmlinux_path__init(void) | |
2321 | { | |
2322 | struct utsname uts; | |
2323 | char bf[PATH_MAX]; | |
2324 | ||
cc612d81 ACM |
2325 | vmlinux_path = malloc(sizeof(char *) * 5); |
2326 | if (vmlinux_path == NULL) | |
2327 | return -1; | |
2328 | ||
2329 | vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux"); | |
2330 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2331 | goto out_fail; | |
2332 | ++vmlinux_path__nr_entries; | |
2333 | vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux"); | |
2334 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2335 | goto out_fail; | |
2336 | ++vmlinux_path__nr_entries; | |
ec5761ea DA |
2337 | |
2338 | /* only try running kernel version if no symfs was given */ | |
2339 | if (symbol_conf.symfs[0] != 0) | |
2340 | return 0; | |
2341 | ||
2342 | if (uname(&uts) < 0) | |
2343 | return -1; | |
2344 | ||
cc612d81 ACM |
2345 | snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", uts.release); |
2346 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2347 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2348 | goto out_fail; | |
2349 | ++vmlinux_path__nr_entries; | |
2350 | snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", uts.release); | |
2351 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2352 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2353 | goto out_fail; | |
2354 | ++vmlinux_path__nr_entries; | |
2355 | snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux", | |
2356 | uts.release); | |
2357 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2358 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2359 | goto out_fail; | |
2360 | ++vmlinux_path__nr_entries; | |
2361 | ||
2362 | return 0; | |
2363 | ||
2364 | out_fail: | |
2365 | vmlinux_path__exit(); | |
2366 | return -1; | |
2367 | } | |
2368 | ||
5ad90e4e | 2369 | size_t machine__fprintf_vmlinux_path(struct machine *self, FILE *fp) |
b0a9ab62 ACM |
2370 | { |
2371 | int i; | |
2372 | size_t printed = 0; | |
5ad90e4e ACM |
2373 | struct dso *kdso = self->vmlinux_maps[MAP__FUNCTION]->dso; |
2374 | ||
2375 | if (kdso->has_build_id) { | |
2376 | char filename[PATH_MAX]; | |
2377 | if (dso__build_id_filename(kdso, filename, sizeof(filename))) | |
2378 | printed += fprintf(fp, "[0] %s\n", filename); | |
2379 | } | |
b0a9ab62 ACM |
2380 | |
2381 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
5ad90e4e ACM |
2382 | printed += fprintf(fp, "[%d] %s\n", |
2383 | i + kdso->has_build_id, vmlinux_path[i]); | |
b0a9ab62 ACM |
2384 | |
2385 | return printed; | |
2386 | } | |
2387 | ||
655000e7 ACM |
2388 | static int setup_list(struct strlist **list, const char *list_str, |
2389 | const char *list_name) | |
2390 | { | |
2391 | if (list_str == NULL) | |
2392 | return 0; | |
2393 | ||
2394 | *list = strlist__new(true, list_str); | |
2395 | if (!*list) { | |
2396 | pr_err("problems parsing %s list\n", list_name); | |
2397 | return -1; | |
2398 | } | |
2399 | return 0; | |
2400 | } | |
2401 | ||
75be6cf4 | 2402 | int symbol__init(void) |
2446042c | 2403 | { |
ec5761ea DA |
2404 | const char *symfs; |
2405 | ||
85e00b55 JZ |
2406 | if (symbol_conf.initialized) |
2407 | return 0; | |
2408 | ||
4d439517 DM |
2409 | symbol_conf.priv_size = ALIGN(symbol_conf.priv_size, sizeof(u64)); |
2410 | ||
95011c60 | 2411 | elf_version(EV_CURRENT); |
75be6cf4 ACM |
2412 | if (symbol_conf.sort_by_name) |
2413 | symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - | |
2414 | sizeof(struct symbol)); | |
b32d133a | 2415 | |
75be6cf4 | 2416 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init() < 0) |
2446042c ACM |
2417 | return -1; |
2418 | ||
c410a338 ACM |
2419 | if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { |
2420 | pr_err("'.' is the only non valid --field-separator argument\n"); | |
2421 | return -1; | |
2422 | } | |
2423 | ||
655000e7 ACM |
2424 | if (setup_list(&symbol_conf.dso_list, |
2425 | symbol_conf.dso_list_str, "dso") < 0) | |
2426 | return -1; | |
2427 | ||
2428 | if (setup_list(&symbol_conf.comm_list, | |
2429 | symbol_conf.comm_list_str, "comm") < 0) | |
2430 | goto out_free_dso_list; | |
2431 | ||
2432 | if (setup_list(&symbol_conf.sym_list, | |
2433 | symbol_conf.sym_list_str, "symbol") < 0) | |
2434 | goto out_free_comm_list; | |
2435 | ||
ec5761ea DA |
2436 | /* |
2437 | * A path to symbols of "/" is identical to "" | |
2438 | * reset here for simplicity. | |
2439 | */ | |
2440 | symfs = realpath(symbol_conf.symfs, NULL); | |
2441 | if (symfs == NULL) | |
2442 | symfs = symbol_conf.symfs; | |
2443 | if (strcmp(symfs, "/") == 0) | |
2444 | symbol_conf.symfs = ""; | |
2445 | if (symfs != symbol_conf.symfs) | |
2446 | free((void *)symfs); | |
2447 | ||
85e00b55 | 2448 | symbol_conf.initialized = true; |
4aa65636 | 2449 | return 0; |
655000e7 ACM |
2450 | |
2451 | out_free_dso_list: | |
2452 | strlist__delete(symbol_conf.dso_list); | |
2453 | out_free_comm_list: | |
2454 | strlist__delete(symbol_conf.comm_list); | |
2455 | return -1; | |
4aa65636 ACM |
2456 | } |
2457 | ||
d65a458b ACM |
2458 | void symbol__exit(void) |
2459 | { | |
85e00b55 JZ |
2460 | if (!symbol_conf.initialized) |
2461 | return; | |
d65a458b ACM |
2462 | strlist__delete(symbol_conf.sym_list); |
2463 | strlist__delete(symbol_conf.dso_list); | |
2464 | strlist__delete(symbol_conf.comm_list); | |
2465 | vmlinux_path__exit(); | |
2466 | symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL; | |
85e00b55 | 2467 | symbol_conf.initialized = false; |
d65a458b ACM |
2468 | } |
2469 | ||
d28c6223 | 2470 | int machines__create_kernel_maps(struct rb_root *self, pid_t pid) |
4aa65636 | 2471 | { |
d28c6223 | 2472 | struct machine *machine = machines__findnew(self, pid); |
9de89fe7 | 2473 | |
23346f21 | 2474 | if (machine == NULL) |
a1645ce1 | 2475 | return -1; |
cc612d81 | 2476 | |
5c0541d5 | 2477 | return machine__create_kernel_maps(machine); |
cd84c2ac | 2478 | } |
5aab621b ACM |
2479 | |
2480 | static int hex(char ch) | |
2481 | { | |
2482 | if ((ch >= '0') && (ch <= '9')) | |
2483 | return ch - '0'; | |
2484 | if ((ch >= 'a') && (ch <= 'f')) | |
2485 | return ch - 'a' + 10; | |
2486 | if ((ch >= 'A') && (ch <= 'F')) | |
2487 | return ch - 'A' + 10; | |
2488 | return -1; | |
2489 | } | |
2490 | ||
2491 | /* | |
2492 | * While we find nice hex chars, build a long_val. | |
2493 | * Return number of chars processed. | |
2494 | */ | |
2495 | int hex2u64(const char *ptr, u64 *long_val) | |
2496 | { | |
2497 | const char *p = ptr; | |
2498 | *long_val = 0; | |
2499 | ||
2500 | while (*p) { | |
2501 | const int hex_val = hex(*p); | |
2502 | ||
2503 | if (hex_val < 0) | |
2504 | break; | |
2505 | ||
2506 | *long_val = (*long_val << 4) | hex_val; | |
2507 | p++; | |
2508 | } | |
2509 | ||
2510 | return p - ptr; | |
2511 | } | |
2512 | ||
2513 | char *strxfrchar(char *s, char from, char to) | |
2514 | { | |
2515 | char *p = s; | |
2516 | ||
2517 | while ((p = strchr(p, from)) != NULL) | |
2518 | *p++ = to; | |
2519 | ||
2520 | return s; | |
2521 | } | |
a1645ce1 | 2522 | |
d28c6223 | 2523 | int machines__create_guest_kernel_maps(struct rb_root *self) |
a1645ce1 ZY |
2524 | { |
2525 | int ret = 0; | |
2526 | struct dirent **namelist = NULL; | |
2527 | int i, items = 0; | |
2528 | char path[PATH_MAX]; | |
2529 | pid_t pid; | |
2530 | ||
2531 | if (symbol_conf.default_guest_vmlinux_name || | |
2532 | symbol_conf.default_guest_modules || | |
2533 | symbol_conf.default_guest_kallsyms) { | |
d28c6223 | 2534 | machines__create_kernel_maps(self, DEFAULT_GUEST_KERNEL_ID); |
a1645ce1 ZY |
2535 | } |
2536 | ||
2537 | if (symbol_conf.guestmount) { | |
2538 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
2539 | if (items <= 0) | |
2540 | return -ENOENT; | |
2541 | for (i = 0; i < items; i++) { | |
2542 | if (!isdigit(namelist[i]->d_name[0])) { | |
2543 | /* Filter out . and .. */ | |
2544 | continue; | |
2545 | } | |
2546 | pid = atoi(namelist[i]->d_name); | |
2547 | sprintf(path, "%s/%s/proc/kallsyms", | |
2548 | symbol_conf.guestmount, | |
2549 | namelist[i]->d_name); | |
2550 | ret = access(path, R_OK); | |
2551 | if (ret) { | |
2552 | pr_debug("Can't access file %s\n", path); | |
2553 | goto failure; | |
2554 | } | |
d28c6223 | 2555 | machines__create_kernel_maps(self, pid); |
a1645ce1 ZY |
2556 | } |
2557 | failure: | |
2558 | free(namelist); | |
2559 | } | |
2560 | ||
2561 | return ret; | |
2562 | } | |
5c0541d5 | 2563 | |
076c6e45 ACM |
2564 | void machines__destroy_guest_kernel_maps(struct rb_root *self) |
2565 | { | |
2566 | struct rb_node *next = rb_first(self); | |
2567 | ||
2568 | while (next) { | |
2569 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
2570 | ||
2571 | next = rb_next(&pos->rb_node); | |
2572 | rb_erase(&pos->rb_node, self); | |
2573 | machine__delete(pos); | |
2574 | } | |
2575 | } | |
2576 | ||
5c0541d5 ACM |
2577 | int machine__load_kallsyms(struct machine *self, const char *filename, |
2578 | enum map_type type, symbol_filter_t filter) | |
2579 | { | |
2580 | struct map *map = self->vmlinux_maps[type]; | |
2581 | int ret = dso__load_kallsyms(map->dso, filename, map, filter); | |
2582 | ||
2583 | if (ret > 0) { | |
2584 | dso__set_loaded(map->dso, type); | |
2585 | /* | |
2586 | * Since /proc/kallsyms will have multiple sessions for the | |
2587 | * kernel, with modules between them, fixup the end of all | |
2588 | * sections. | |
2589 | */ | |
2590 | __map_groups__fixup_end(&self->kmaps, type); | |
2591 | } | |
2592 | ||
2593 | return ret; | |
2594 | } | |
2595 | ||
2596 | int machine__load_vmlinux_path(struct machine *self, enum map_type type, | |
2597 | symbol_filter_t filter) | |
2598 | { | |
2599 | struct map *map = self->vmlinux_maps[type]; | |
2600 | int ret = dso__load_vmlinux_path(map->dso, map, filter); | |
2601 | ||
2602 | if (ret > 0) { | |
2603 | dso__set_loaded(map->dso, type); | |
2604 | map__reloc_vmlinux(map); | |
2605 | } | |
2606 | ||
2607 | return ret; | |
2608 | } |