Commit | Line | Data |
---|---|---|
5aab621b ACM |
1 | #define _GNU_SOURCE |
2 | #include <ctype.h> | |
3 | #include <dirent.h> | |
4 | #include <errno.h> | |
5 | #include <libgen.h> | |
6 | #include <stdlib.h> | |
7 | #include <stdio.h> | |
8 | #include <string.h> | |
9 | #include <sys/types.h> | |
10 | #include <sys/stat.h> | |
11 | #include <sys/param.h> | |
12 | #include <fcntl.h> | |
13 | #include <unistd.h> | |
b36f19d5 | 14 | #include "build-id.h" |
8a6c5b26 | 15 | #include "debug.h" |
a2928c42 | 16 | #include "symbol.h" |
5aab621b | 17 | #include "strlist.h" |
a2928c42 ACM |
18 | |
19 | #include <libelf.h> | |
20 | #include <gelf.h> | |
21 | #include <elf.h> | |
f1617b40 | 22 | #include <limits.h> |
439d473b | 23 | #include <sys/utsname.h> |
2cdbc46d | 24 | |
c12e15e7 ACM |
25 | #ifndef NT_GNU_BUILD_ID |
26 | #define NT_GNU_BUILD_ID 3 | |
27 | #endif | |
28 | ||
21916c38 DM |
29 | static bool dso__build_id_equal(const struct dso *self, u8 *build_id); |
30 | static int elf_read_build_id(Elf *elf, void *bf, size_t size); | |
b0da954a | 31 | static void dsos__add(struct list_head *head, struct dso *dso); |
3610583c | 32 | static struct map *map__new2(u64 start, struct dso *dso, enum map_type type); |
c338aee8 | 33 | static int dso__load_kernel_sym(struct dso *self, struct map *map, |
9de89fe7 | 34 | symbol_filter_t filter); |
a1645ce1 ZY |
35 | static int dso__load_guest_kernel_sym(struct dso *self, struct map *map, |
36 | symbol_filter_t filter); | |
cc612d81 ACM |
37 | static int vmlinux_path__nr_entries; |
38 | static char **vmlinux_path; | |
439d473b | 39 | |
75be6cf4 | 40 | struct symbol_conf symbol_conf = { |
d599db3f | 41 | .exclude_other = true, |
b32d133a ACM |
42 | .use_modules = true, |
43 | .try_vmlinux_path = true, | |
44 | }; | |
45 | ||
8a6c5b26 ACM |
46 | int dso__name_len(const struct dso *self) |
47 | { | |
48 | if (verbose) | |
49 | return self->long_name_len; | |
50 | ||
51 | return self->short_name_len; | |
52 | } | |
53 | ||
3610583c ACM |
54 | bool dso__loaded(const struct dso *self, enum map_type type) |
55 | { | |
56 | return self->loaded & (1 << type); | |
57 | } | |
58 | ||
79406cd7 ACM |
59 | bool dso__sorted_by_name(const struct dso *self, enum map_type type) |
60 | { | |
61 | return self->sorted_by_name & (1 << type); | |
62 | } | |
63 | ||
79406cd7 ACM |
64 | static void dso__set_sorted_by_name(struct dso *self, enum map_type type) |
65 | { | |
66 | self->sorted_by_name |= (1 << type); | |
67 | } | |
68 | ||
36a3e646 | 69 | bool symbol_type__is_a(char symbol_type, enum map_type map_type) |
6893d4ee ACM |
70 | { |
71 | switch (map_type) { | |
72 | case MAP__FUNCTION: | |
73 | return symbol_type == 'T' || symbol_type == 'W'; | |
f1dfa0b1 ACM |
74 | case MAP__VARIABLE: |
75 | return symbol_type == 'D' || symbol_type == 'd'; | |
6893d4ee ACM |
76 | default: |
77 | return false; | |
78 | } | |
79 | } | |
80 | ||
fcf1203a | 81 | static void symbols__fixup_end(struct rb_root *self) |
af427bf5 | 82 | { |
fcf1203a | 83 | struct rb_node *nd, *prevnd = rb_first(self); |
2e538c4a | 84 | struct symbol *curr, *prev; |
af427bf5 ACM |
85 | |
86 | if (prevnd == NULL) | |
87 | return; | |
88 | ||
2e538c4a ACM |
89 | curr = rb_entry(prevnd, struct symbol, rb_node); |
90 | ||
af427bf5 | 91 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { |
2e538c4a ACM |
92 | prev = curr; |
93 | curr = rb_entry(nd, struct symbol, rb_node); | |
af427bf5 ACM |
94 | |
95 | if (prev->end == prev->start) | |
96 | prev->end = curr->start - 1; | |
af427bf5 | 97 | } |
2e538c4a ACM |
98 | |
99 | /* Last entry */ | |
100 | if (curr->end == curr->start) | |
101 | curr->end = roundup(curr->start, 4096); | |
af427bf5 ACM |
102 | } |
103 | ||
9958e1f0 | 104 | static void __map_groups__fixup_end(struct map_groups *self, enum map_type type) |
af427bf5 ACM |
105 | { |
106 | struct map *prev, *curr; | |
95011c60 | 107 | struct rb_node *nd, *prevnd = rb_first(&self->maps[type]); |
af427bf5 ACM |
108 | |
109 | if (prevnd == NULL) | |
110 | return; | |
111 | ||
112 | curr = rb_entry(prevnd, struct map, rb_node); | |
af427bf5 ACM |
113 | |
114 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { | |
115 | prev = curr; | |
116 | curr = rb_entry(nd, struct map, rb_node); | |
117 | prev->end = curr->start - 1; | |
2e538c4a | 118 | } |
90c83218 ACM |
119 | |
120 | /* | |
121 | * We still haven't the actual symbols, so guess the | |
122 | * last map final address. | |
123 | */ | |
9d1faba5 | 124 | curr->end = ~0ULL; |
af427bf5 ACM |
125 | } |
126 | ||
9958e1f0 | 127 | static void map_groups__fixup_end(struct map_groups *self) |
23ea4a3f ACM |
128 | { |
129 | int i; | |
130 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
9958e1f0 | 131 | __map_groups__fixup_end(self, i); |
23ea4a3f ACM |
132 | } |
133 | ||
c408fedf ACM |
134 | static struct symbol *symbol__new(u64 start, u64 len, u8 binding, |
135 | const char *name) | |
a2928c42 | 136 | { |
0085c954 | 137 | size_t namelen = strlen(name) + 1; |
5aab621b ACM |
138 | struct symbol *self = calloc(1, (symbol_conf.priv_size + |
139 | sizeof(*self) + namelen)); | |
36479484 | 140 | if (self == NULL) |
0b73da3f IM |
141 | return NULL; |
142 | ||
75be6cf4 ACM |
143 | if (symbol_conf.priv_size) |
144 | self = ((void *)self) + symbol_conf.priv_size; | |
36479484 | 145 | |
fefb0b94 ACM |
146 | self->start = start; |
147 | self->end = len ? start + len - 1 : start; | |
c408fedf | 148 | self->binding = binding; |
fefb0b94 | 149 | self->namelen = namelen - 1; |
e4204992 | 150 | |
29a9f66d | 151 | pr_debug4("%s: %s %#Lx-%#Lx\n", __func__, name, start, self->end); |
e4204992 | 152 | |
0b73da3f | 153 | memcpy(self->name, name, namelen); |
a2928c42 ACM |
154 | |
155 | return self; | |
156 | } | |
157 | ||
628ada0c | 158 | void symbol__delete(struct symbol *self) |
a2928c42 | 159 | { |
75be6cf4 | 160 | free(((void *)self) - symbol_conf.priv_size); |
a2928c42 ACM |
161 | } |
162 | ||
163 | static size_t symbol__fprintf(struct symbol *self, FILE *fp) | |
164 | { | |
c408fedf ACM |
165 | return fprintf(fp, " %llx-%llx %c %s\n", |
166 | self->start, self->end, | |
167 | self->binding == STB_GLOBAL ? 'g' : | |
168 | self->binding == STB_LOCAL ? 'l' : 'w', | |
169 | self->name); | |
a2928c42 ACM |
170 | } |
171 | ||
b7cece76 | 172 | void dso__set_long_name(struct dso *self, char *name) |
cfc10d3b | 173 | { |
ef6ae724 ACM |
174 | if (name == NULL) |
175 | return; | |
cfc10d3b ACM |
176 | self->long_name = name; |
177 | self->long_name_len = strlen(name); | |
178 | } | |
179 | ||
b63be8d7 ACM |
180 | static void dso__set_short_name(struct dso *self, const char *name) |
181 | { | |
182 | if (name == NULL) | |
183 | return; | |
184 | self->short_name = name; | |
185 | self->short_name_len = strlen(name); | |
186 | } | |
187 | ||
cfc10d3b ACM |
188 | static void dso__set_basename(struct dso *self) |
189 | { | |
b63be8d7 | 190 | dso__set_short_name(self, basename(self->long_name)); |
cfc10d3b ACM |
191 | } |
192 | ||
00a192b3 | 193 | struct dso *dso__new(const char *name) |
a2928c42 | 194 | { |
5aab621b | 195 | struct dso *self = calloc(1, sizeof(*self) + strlen(name) + 1); |
a2928c42 ACM |
196 | |
197 | if (self != NULL) { | |
6a4694a4 | 198 | int i; |
a2928c42 | 199 | strcpy(self->name, name); |
cfc10d3b | 200 | dso__set_long_name(self, self->name); |
b63be8d7 | 201 | dso__set_short_name(self, self->name); |
6a4694a4 | 202 | for (i = 0; i < MAP__NR_TYPES; ++i) |
79406cd7 | 203 | self->symbols[i] = self->symbol_names[i] = RB_ROOT; |
52d422de | 204 | self->slen_calculated = 0; |
94cb9e38 | 205 | self->origin = DSO__ORIG_NOT_FOUND; |
8d06367f | 206 | self->loaded = 0; |
79406cd7 | 207 | self->sorted_by_name = 0; |
8d06367f | 208 | self->has_build_id = 0; |
a1645ce1 | 209 | self->kernel = DSO_TYPE_USER; |
0ab061cd | 210 | INIT_LIST_HEAD(&self->node); |
a2928c42 ACM |
211 | } |
212 | ||
213 | return self; | |
214 | } | |
215 | ||
fcf1203a | 216 | static void symbols__delete(struct rb_root *self) |
a2928c42 ACM |
217 | { |
218 | struct symbol *pos; | |
fcf1203a | 219 | struct rb_node *next = rb_first(self); |
a2928c42 ACM |
220 | |
221 | while (next) { | |
222 | pos = rb_entry(next, struct symbol, rb_node); | |
223 | next = rb_next(&pos->rb_node); | |
fcf1203a | 224 | rb_erase(&pos->rb_node, self); |
00a192b3 | 225 | symbol__delete(pos); |
a2928c42 ACM |
226 | } |
227 | } | |
228 | ||
229 | void dso__delete(struct dso *self) | |
230 | { | |
6a4694a4 ACM |
231 | int i; |
232 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
233 | symbols__delete(&self->symbols[i]); | |
6e406257 ACM |
234 | if (self->sname_alloc) |
235 | free((char *)self->short_name); | |
236 | if (self->lname_alloc) | |
439d473b | 237 | free(self->long_name); |
a2928c42 ACM |
238 | free(self); |
239 | } | |
240 | ||
8d06367f ACM |
241 | void dso__set_build_id(struct dso *self, void *build_id) |
242 | { | |
243 | memcpy(self->build_id, build_id, sizeof(self->build_id)); | |
244 | self->has_build_id = 1; | |
245 | } | |
246 | ||
fcf1203a | 247 | static void symbols__insert(struct rb_root *self, struct symbol *sym) |
a2928c42 | 248 | { |
fcf1203a | 249 | struct rb_node **p = &self->rb_node; |
a2928c42 | 250 | struct rb_node *parent = NULL; |
9cffa8d5 | 251 | const u64 ip = sym->start; |
a2928c42 ACM |
252 | struct symbol *s; |
253 | ||
254 | while (*p != NULL) { | |
255 | parent = *p; | |
256 | s = rb_entry(parent, struct symbol, rb_node); | |
257 | if (ip < s->start) | |
258 | p = &(*p)->rb_left; | |
259 | else | |
260 | p = &(*p)->rb_right; | |
261 | } | |
262 | rb_link_node(&sym->rb_node, parent, p); | |
fcf1203a | 263 | rb_insert_color(&sym->rb_node, self); |
a2928c42 ACM |
264 | } |
265 | ||
fcf1203a | 266 | static struct symbol *symbols__find(struct rb_root *self, u64 ip) |
a2928c42 ACM |
267 | { |
268 | struct rb_node *n; | |
269 | ||
270 | if (self == NULL) | |
271 | return NULL; | |
272 | ||
fcf1203a | 273 | n = self->rb_node; |
a2928c42 ACM |
274 | |
275 | while (n) { | |
276 | struct symbol *s = rb_entry(n, struct symbol, rb_node); | |
277 | ||
278 | if (ip < s->start) | |
279 | n = n->rb_left; | |
280 | else if (ip > s->end) | |
281 | n = n->rb_right; | |
282 | else | |
283 | return s; | |
284 | } | |
285 | ||
286 | return NULL; | |
287 | } | |
288 | ||
79406cd7 ACM |
289 | struct symbol_name_rb_node { |
290 | struct rb_node rb_node; | |
291 | struct symbol sym; | |
292 | }; | |
293 | ||
294 | static void symbols__insert_by_name(struct rb_root *self, struct symbol *sym) | |
295 | { | |
296 | struct rb_node **p = &self->rb_node; | |
297 | struct rb_node *parent = NULL; | |
02a9d037 RV |
298 | struct symbol_name_rb_node *symn, *s; |
299 | ||
300 | symn = container_of(sym, struct symbol_name_rb_node, sym); | |
79406cd7 ACM |
301 | |
302 | while (*p != NULL) { | |
303 | parent = *p; | |
304 | s = rb_entry(parent, struct symbol_name_rb_node, rb_node); | |
305 | if (strcmp(sym->name, s->sym.name) < 0) | |
306 | p = &(*p)->rb_left; | |
307 | else | |
308 | p = &(*p)->rb_right; | |
309 | } | |
310 | rb_link_node(&symn->rb_node, parent, p); | |
311 | rb_insert_color(&symn->rb_node, self); | |
312 | } | |
313 | ||
314 | static void symbols__sort_by_name(struct rb_root *self, struct rb_root *source) | |
315 | { | |
316 | struct rb_node *nd; | |
317 | ||
318 | for (nd = rb_first(source); nd; nd = rb_next(nd)) { | |
319 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
320 | symbols__insert_by_name(self, pos); | |
321 | } | |
322 | } | |
323 | ||
324 | static struct symbol *symbols__find_by_name(struct rb_root *self, const char *name) | |
325 | { | |
326 | struct rb_node *n; | |
327 | ||
328 | if (self == NULL) | |
329 | return NULL; | |
330 | ||
331 | n = self->rb_node; | |
332 | ||
333 | while (n) { | |
334 | struct symbol_name_rb_node *s; | |
335 | int cmp; | |
336 | ||
337 | s = rb_entry(n, struct symbol_name_rb_node, rb_node); | |
338 | cmp = strcmp(name, s->sym.name); | |
339 | ||
340 | if (cmp < 0) | |
341 | n = n->rb_left; | |
342 | else if (cmp > 0) | |
343 | n = n->rb_right; | |
344 | else | |
345 | return &s->sym; | |
346 | } | |
347 | ||
348 | return NULL; | |
349 | } | |
350 | ||
351 | struct symbol *dso__find_symbol(struct dso *self, | |
352 | enum map_type type, u64 addr) | |
fcf1203a | 353 | { |
6a4694a4 | 354 | return symbols__find(&self->symbols[type], addr); |
fcf1203a ACM |
355 | } |
356 | ||
79406cd7 ACM |
357 | struct symbol *dso__find_symbol_by_name(struct dso *self, enum map_type type, |
358 | const char *name) | |
359 | { | |
360 | return symbols__find_by_name(&self->symbol_names[type], name); | |
361 | } | |
362 | ||
363 | void dso__sort_by_name(struct dso *self, enum map_type type) | |
364 | { | |
365 | dso__set_sorted_by_name(self, type); | |
366 | return symbols__sort_by_name(&self->symbol_names[type], | |
367 | &self->symbols[type]); | |
368 | } | |
369 | ||
ef12a141 | 370 | int build_id__sprintf(const u8 *self, int len, char *bf) |
a2928c42 | 371 | { |
8d06367f | 372 | char *bid = bf; |
ef12a141 | 373 | const u8 *raw = self; |
8d06367f | 374 | int i; |
a2928c42 | 375 | |
8d06367f ACM |
376 | for (i = 0; i < len; ++i) { |
377 | sprintf(bid, "%02x", *raw); | |
378 | ++raw; | |
379 | bid += 2; | |
380 | } | |
381 | ||
382 | return raw - self; | |
383 | } | |
384 | ||
9e03eb2d | 385 | size_t dso__fprintf_buildid(struct dso *self, FILE *fp) |
8d06367f ACM |
386 | { |
387 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
8d06367f ACM |
388 | |
389 | build_id__sprintf(self->build_id, sizeof(self->build_id), sbuild_id); | |
9e03eb2d ACM |
390 | return fprintf(fp, "%s", sbuild_id); |
391 | } | |
392 | ||
90f18e63 SD |
393 | size_t dso__fprintf_symbols_by_name(struct dso *self, enum map_type type, FILE *fp) |
394 | { | |
395 | size_t ret = 0; | |
396 | struct rb_node *nd; | |
397 | struct symbol_name_rb_node *pos; | |
398 | ||
399 | for (nd = rb_first(&self->symbol_names[type]); nd; nd = rb_next(nd)) { | |
400 | pos = rb_entry(nd, struct symbol_name_rb_node, rb_node); | |
401 | fprintf(fp, "%s\n", pos->sym.name); | |
402 | } | |
403 | ||
404 | return ret; | |
405 | } | |
406 | ||
95011c60 | 407 | size_t dso__fprintf(struct dso *self, enum map_type type, FILE *fp) |
9e03eb2d ACM |
408 | { |
409 | struct rb_node *nd; | |
410 | size_t ret = fprintf(fp, "dso: %s (", self->short_name); | |
411 | ||
3846df2e ACM |
412 | if (self->short_name != self->long_name) |
413 | ret += fprintf(fp, "%s, ", self->long_name); | |
414 | ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type], | |
415 | self->loaded ? "" : "NOT "); | |
9e03eb2d | 416 | ret += dso__fprintf_buildid(self, fp); |
6a4694a4 | 417 | ret += fprintf(fp, ")\n"); |
95011c60 ACM |
418 | for (nd = rb_first(&self->symbols[type]); nd; nd = rb_next(nd)) { |
419 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
420 | ret += symbol__fprintf(pos, fp); | |
a2928c42 ACM |
421 | } |
422 | ||
423 | return ret; | |
424 | } | |
425 | ||
9e201442 ACM |
426 | int kallsyms__parse(const char *filename, void *arg, |
427 | int (*process_symbol)(void *arg, const char *name, | |
682b335a | 428 | char type, u64 start)) |
a2928c42 | 429 | { |
a2928c42 ACM |
430 | char *line = NULL; |
431 | size_t n; | |
682b335a | 432 | int err = 0; |
9e201442 | 433 | FILE *file = fopen(filename, "r"); |
a2928c42 ACM |
434 | |
435 | if (file == NULL) | |
436 | goto out_failure; | |
437 | ||
438 | while (!feof(file)) { | |
9cffa8d5 | 439 | u64 start; |
a2928c42 ACM |
440 | int line_len, len; |
441 | char symbol_type; | |
2e538c4a | 442 | char *symbol_name; |
a2928c42 ACM |
443 | |
444 | line_len = getline(&line, &n, file); | |
a1645ce1 | 445 | if (line_len < 0 || !line) |
a2928c42 ACM |
446 | break; |
447 | ||
a2928c42 ACM |
448 | line[--line_len] = '\0'; /* \n */ |
449 | ||
a0055ae2 | 450 | len = hex2u64(line, &start); |
a2928c42 ACM |
451 | |
452 | len++; | |
453 | if (len + 2 >= line_len) | |
454 | continue; | |
455 | ||
456 | symbol_type = toupper(line[len]); | |
af427bf5 | 457 | symbol_name = line + len + 2; |
682b335a ACM |
458 | |
459 | err = process_symbol(arg, symbol_name, symbol_type, start); | |
460 | if (err) | |
461 | break; | |
2e538c4a ACM |
462 | } |
463 | ||
464 | free(line); | |
465 | fclose(file); | |
682b335a | 466 | return err; |
2e538c4a | 467 | |
2e538c4a ACM |
468 | out_failure: |
469 | return -1; | |
470 | } | |
471 | ||
682b335a ACM |
472 | struct process_kallsyms_args { |
473 | struct map *map; | |
474 | struct dso *dso; | |
475 | }; | |
476 | ||
c408fedf ACM |
477 | static u8 kallsyms2elf_type(char type) |
478 | { | |
479 | if (type == 'W') | |
480 | return STB_WEAK; | |
481 | ||
482 | return isupper(type) ? STB_GLOBAL : STB_LOCAL; | |
483 | } | |
484 | ||
682b335a ACM |
485 | static int map__process_kallsym_symbol(void *arg, const char *name, |
486 | char type, u64 start) | |
487 | { | |
488 | struct symbol *sym; | |
489 | struct process_kallsyms_args *a = arg; | |
490 | struct rb_root *root = &a->dso->symbols[a->map->type]; | |
491 | ||
492 | if (!symbol_type__is_a(type, a->map->type)) | |
493 | return 0; | |
494 | ||
495 | /* | |
496 | * Will fix up the end later, when we have all symbols sorted. | |
497 | */ | |
c408fedf | 498 | sym = symbol__new(start, 0, kallsyms2elf_type(type), name); |
682b335a ACM |
499 | |
500 | if (sym == NULL) | |
501 | return -ENOMEM; | |
502 | /* | |
503 | * We will pass the symbols to the filter later, in | |
504 | * map__split_kallsyms, when we have split the maps per module | |
505 | */ | |
506 | symbols__insert(root, sym); | |
a1645ce1 | 507 | |
682b335a ACM |
508 | return 0; |
509 | } | |
510 | ||
511 | /* | |
512 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
513 | * so that we can in the next step set the symbol ->end address and then | |
514 | * call kernel_maps__split_kallsyms. | |
515 | */ | |
9e201442 ACM |
516 | static int dso__load_all_kallsyms(struct dso *self, const char *filename, |
517 | struct map *map) | |
682b335a ACM |
518 | { |
519 | struct process_kallsyms_args args = { .map = map, .dso = self, }; | |
9e201442 | 520 | return kallsyms__parse(filename, &args, map__process_kallsym_symbol); |
682b335a ACM |
521 | } |
522 | ||
2e538c4a ACM |
523 | /* |
524 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
525 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
526 | * the original ELF section names vmlinux have. | |
527 | */ | |
9958e1f0 | 528 | static int dso__split_kallsyms(struct dso *self, struct map *map, |
9de89fe7 | 529 | symbol_filter_t filter) |
2e538c4a | 530 | { |
9de89fe7 | 531 | struct map_groups *kmaps = map__kmap(map)->kmaps; |
23346f21 | 532 | struct machine *machine = kmaps->machine; |
4e06255f | 533 | struct map *curr_map = map; |
2e538c4a ACM |
534 | struct symbol *pos; |
535 | int count = 0; | |
4e06255f ACM |
536 | struct rb_root *root = &self->symbols[map->type]; |
537 | struct rb_node *next = rb_first(root); | |
2e538c4a ACM |
538 | int kernel_range = 0; |
539 | ||
540 | while (next) { | |
541 | char *module; | |
542 | ||
543 | pos = rb_entry(next, struct symbol, rb_node); | |
544 | next = rb_next(&pos->rb_node); | |
545 | ||
546 | module = strchr(pos->name, '\t'); | |
547 | if (module) { | |
75be6cf4 | 548 | if (!symbol_conf.use_modules) |
1de8e245 ACM |
549 | goto discard_symbol; |
550 | ||
2e538c4a ACM |
551 | *module++ = '\0'; |
552 | ||
b7cece76 | 553 | if (strcmp(curr_map->dso->short_name, module)) { |
a1645ce1 | 554 | if (curr_map != map && |
23346f21 ACM |
555 | self->kernel == DSO_TYPE_GUEST_KERNEL && |
556 | machine__is_default_guest(machine)) { | |
a1645ce1 ZY |
557 | /* |
558 | * We assume all symbols of a module are | |
559 | * continuous in * kallsyms, so curr_map | |
560 | * points to a module and all its | |
561 | * symbols are in its kmap. Mark it as | |
562 | * loaded. | |
563 | */ | |
564 | dso__set_loaded(curr_map->dso, | |
565 | curr_map->type); | |
566 | } | |
567 | ||
568 | curr_map = map_groups__find_by_name(kmaps, | |
569 | map->type, module); | |
4e06255f | 570 | if (curr_map == NULL) { |
2f51903b | 571 | pr_debug("%s/proc/{kallsyms,modules} " |
b7cece76 | 572 | "inconsistency while looking " |
a1645ce1 | 573 | "for \"%s\" module!\n", |
23346f21 | 574 | machine->root_dir, module); |
a1645ce1 ZY |
575 | curr_map = map; |
576 | goto discard_symbol; | |
af427bf5 | 577 | } |
b7cece76 | 578 | |
a1645ce1 | 579 | if (curr_map->dso->loaded && |
23346f21 | 580 | !machine__is_default_guest(machine)) |
b7cece76 | 581 | goto discard_symbol; |
af427bf5 | 582 | } |
2e538c4a ACM |
583 | /* |
584 | * So that we look just like we get from .ko files, | |
585 | * i.e. not prelinked, relative to map->start. | |
586 | */ | |
4e06255f ACM |
587 | pos->start = curr_map->map_ip(curr_map, pos->start); |
588 | pos->end = curr_map->map_ip(curr_map, pos->end); | |
589 | } else if (curr_map != map) { | |
2e538c4a ACM |
590 | char dso_name[PATH_MAX]; |
591 | struct dso *dso; | |
592 | ||
a1645ce1 ZY |
593 | if (self->kernel == DSO_TYPE_GUEST_KERNEL) |
594 | snprintf(dso_name, sizeof(dso_name), | |
595 | "[guest.kernel].%d", | |
596 | kernel_range++); | |
597 | else | |
598 | snprintf(dso_name, sizeof(dso_name), | |
599 | "[kernel].%d", | |
600 | kernel_range++); | |
2e538c4a | 601 | |
00a192b3 | 602 | dso = dso__new(dso_name); |
2e538c4a ACM |
603 | if (dso == NULL) |
604 | return -1; | |
605 | ||
a1645ce1 ZY |
606 | dso->kernel = self->kernel; |
607 | ||
4e06255f | 608 | curr_map = map__new2(pos->start, dso, map->type); |
37fe5fcb | 609 | if (curr_map == NULL) { |
2e538c4a ACM |
610 | dso__delete(dso); |
611 | return -1; | |
612 | } | |
a2928c42 | 613 | |
4e06255f | 614 | curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; |
9de89fe7 | 615 | map_groups__insert(kmaps, curr_map); |
2e538c4a ACM |
616 | ++kernel_range; |
617 | } | |
a2928c42 | 618 | |
4e06255f | 619 | if (filter && filter(curr_map, pos)) { |
1de8e245 | 620 | discard_symbol: rb_erase(&pos->rb_node, root); |
00a192b3 | 621 | symbol__delete(pos); |
2e538c4a | 622 | } else { |
4e06255f ACM |
623 | if (curr_map != map) { |
624 | rb_erase(&pos->rb_node, root); | |
625 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
2e538c4a | 626 | } |
9974f496 MG |
627 | count++; |
628 | } | |
a2928c42 ACM |
629 | } |
630 | ||
a1645ce1 ZY |
631 | if (curr_map != map && |
632 | self->kernel == DSO_TYPE_GUEST_KERNEL && | |
23346f21 | 633 | machine__is_default_guest(kmaps->machine)) { |
a1645ce1 ZY |
634 | dso__set_loaded(curr_map->dso, curr_map->type); |
635 | } | |
636 | ||
9974f496 | 637 | return count; |
2e538c4a | 638 | } |
a2928c42 | 639 | |
9de89fe7 ACM |
640 | int dso__load_kallsyms(struct dso *self, const char *filename, |
641 | struct map *map, symbol_filter_t filter) | |
2e538c4a | 642 | { |
9e201442 | 643 | if (dso__load_all_kallsyms(self, filename, map) < 0) |
2e538c4a ACM |
644 | return -1; |
645 | ||
4e06255f | 646 | symbols__fixup_end(&self->symbols[map->type]); |
a1645ce1 ZY |
647 | if (self->kernel == DSO_TYPE_GUEST_KERNEL) |
648 | self->origin = DSO__ORIG_GUEST_KERNEL; | |
649 | else | |
650 | self->origin = DSO__ORIG_KERNEL; | |
2e538c4a | 651 | |
9de89fe7 | 652 | return dso__split_kallsyms(self, map, filter); |
af427bf5 ACM |
653 | } |
654 | ||
439d473b | 655 | static int dso__load_perf_map(struct dso *self, struct map *map, |
6beba7ad | 656 | symbol_filter_t filter) |
80d496be PE |
657 | { |
658 | char *line = NULL; | |
659 | size_t n; | |
660 | FILE *file; | |
661 | int nr_syms = 0; | |
662 | ||
439d473b | 663 | file = fopen(self->long_name, "r"); |
80d496be PE |
664 | if (file == NULL) |
665 | goto out_failure; | |
666 | ||
667 | while (!feof(file)) { | |
9cffa8d5 | 668 | u64 start, size; |
80d496be PE |
669 | struct symbol *sym; |
670 | int line_len, len; | |
671 | ||
672 | line_len = getline(&line, &n, file); | |
673 | if (line_len < 0) | |
674 | break; | |
675 | ||
676 | if (!line) | |
677 | goto out_failure; | |
678 | ||
679 | line[--line_len] = '\0'; /* \n */ | |
680 | ||
681 | len = hex2u64(line, &start); | |
682 | ||
683 | len++; | |
684 | if (len + 2 >= line_len) | |
685 | continue; | |
686 | ||
687 | len += hex2u64(line + len, &size); | |
688 | ||
689 | len++; | |
690 | if (len + 2 >= line_len) | |
691 | continue; | |
692 | ||
c408fedf | 693 | sym = symbol__new(start, size, STB_GLOBAL, line + len); |
80d496be PE |
694 | |
695 | if (sym == NULL) | |
696 | goto out_delete_line; | |
697 | ||
439d473b | 698 | if (filter && filter(map, sym)) |
00a192b3 | 699 | symbol__delete(sym); |
80d496be | 700 | else { |
6a4694a4 | 701 | symbols__insert(&self->symbols[map->type], sym); |
80d496be PE |
702 | nr_syms++; |
703 | } | |
704 | } | |
705 | ||
706 | free(line); | |
707 | fclose(file); | |
708 | ||
709 | return nr_syms; | |
710 | ||
711 | out_delete_line: | |
712 | free(line); | |
713 | out_failure: | |
714 | return -1; | |
715 | } | |
716 | ||
a2928c42 ACM |
717 | /** |
718 | * elf_symtab__for_each_symbol - iterate thru all the symbols | |
719 | * | |
720 | * @self: struct elf_symtab instance to iterate | |
83a0944f | 721 | * @idx: uint32_t idx |
a2928c42 ACM |
722 | * @sym: GElf_Sym iterator |
723 | */ | |
83a0944f IM |
724 | #define elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) \ |
725 | for (idx = 0, gelf_getsym(syms, idx, &sym);\ | |
726 | idx < nr_syms; \ | |
727 | idx++, gelf_getsym(syms, idx, &sym)) | |
a2928c42 ACM |
728 | |
729 | static inline uint8_t elf_sym__type(const GElf_Sym *sym) | |
730 | { | |
731 | return GELF_ST_TYPE(sym->st_info); | |
732 | } | |
733 | ||
734 | static inline int elf_sym__is_function(const GElf_Sym *sym) | |
735 | { | |
736 | return elf_sym__type(sym) == STT_FUNC && | |
737 | sym->st_name != 0 && | |
81833130 | 738 | sym->st_shndx != SHN_UNDEF; |
a2928c42 ACM |
739 | } |
740 | ||
f1dfa0b1 ACM |
741 | static inline bool elf_sym__is_object(const GElf_Sym *sym) |
742 | { | |
743 | return elf_sym__type(sym) == STT_OBJECT && | |
744 | sym->st_name != 0 && | |
745 | sym->st_shndx != SHN_UNDEF; | |
746 | } | |
747 | ||
6cfcc53e MG |
748 | static inline int elf_sym__is_label(const GElf_Sym *sym) |
749 | { | |
750 | return elf_sym__type(sym) == STT_NOTYPE && | |
751 | sym->st_name != 0 && | |
752 | sym->st_shndx != SHN_UNDEF && | |
753 | sym->st_shndx != SHN_ABS; | |
754 | } | |
755 | ||
756 | static inline const char *elf_sec__name(const GElf_Shdr *shdr, | |
757 | const Elf_Data *secstrs) | |
758 | { | |
759 | return secstrs->d_buf + shdr->sh_name; | |
760 | } | |
761 | ||
762 | static inline int elf_sec__is_text(const GElf_Shdr *shdr, | |
763 | const Elf_Data *secstrs) | |
764 | { | |
765 | return strstr(elf_sec__name(shdr, secstrs), "text") != NULL; | |
766 | } | |
767 | ||
f1dfa0b1 ACM |
768 | static inline bool elf_sec__is_data(const GElf_Shdr *shdr, |
769 | const Elf_Data *secstrs) | |
770 | { | |
771 | return strstr(elf_sec__name(shdr, secstrs), "data") != NULL; | |
772 | } | |
773 | ||
a2928c42 ACM |
774 | static inline const char *elf_sym__name(const GElf_Sym *sym, |
775 | const Elf_Data *symstrs) | |
776 | { | |
777 | return symstrs->d_buf + sym->st_name; | |
778 | } | |
779 | ||
780 | static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, | |
781 | GElf_Shdr *shp, const char *name, | |
83a0944f | 782 | size_t *idx) |
a2928c42 ACM |
783 | { |
784 | Elf_Scn *sec = NULL; | |
785 | size_t cnt = 1; | |
786 | ||
787 | while ((sec = elf_nextscn(elf, sec)) != NULL) { | |
788 | char *str; | |
789 | ||
790 | gelf_getshdr(sec, shp); | |
791 | str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name); | |
792 | if (!strcmp(name, str)) { | |
83a0944f IM |
793 | if (idx) |
794 | *idx = cnt; | |
a2928c42 ACM |
795 | break; |
796 | } | |
797 | ++cnt; | |
798 | } | |
799 | ||
800 | return sec; | |
801 | } | |
802 | ||
8ce998d6 ACM |
803 | #define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \ |
804 | for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \ | |
805 | idx < nr_entries; \ | |
806 | ++idx, pos = gelf_getrel(reldata, idx, &pos_mem)) | |
807 | ||
808 | #define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \ | |
809 | for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \ | |
810 | idx < nr_entries; \ | |
811 | ++idx, pos = gelf_getrela(reldata, idx, &pos_mem)) | |
812 | ||
a25e46c4 ACM |
813 | /* |
814 | * We need to check if we have a .dynsym, so that we can handle the | |
815 | * .plt, synthesizing its symbols, that aren't on the symtabs (be it | |
816 | * .dynsym or .symtab). | |
817 | * And always look at the original dso, not at debuginfo packages, that | |
818 | * have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS). | |
819 | */ | |
82164161 ACM |
820 | static int dso__synthesize_plt_symbols(struct dso *self, struct map *map, |
821 | symbol_filter_t filter) | |
8ce998d6 ACM |
822 | { |
823 | uint32_t nr_rel_entries, idx; | |
824 | GElf_Sym sym; | |
9cffa8d5 | 825 | u64 plt_offset; |
8ce998d6 ACM |
826 | GElf_Shdr shdr_plt; |
827 | struct symbol *f; | |
a25e46c4 | 828 | GElf_Shdr shdr_rel_plt, shdr_dynsym; |
8ce998d6 | 829 | Elf_Data *reldata, *syms, *symstrs; |
a25e46c4 ACM |
830 | Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym; |
831 | size_t dynsym_idx; | |
832 | GElf_Ehdr ehdr; | |
8ce998d6 | 833 | char sympltname[1024]; |
a25e46c4 ACM |
834 | Elf *elf; |
835 | int nr = 0, symidx, fd, err = 0; | |
836 | ||
439d473b | 837 | fd = open(self->long_name, O_RDONLY); |
a25e46c4 ACM |
838 | if (fd < 0) |
839 | goto out; | |
840 | ||
84087126 | 841 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a25e46c4 ACM |
842 | if (elf == NULL) |
843 | goto out_close; | |
844 | ||
845 | if (gelf_getehdr(elf, &ehdr) == NULL) | |
846 | goto out_elf_end; | |
847 | ||
848 | scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym, | |
849 | ".dynsym", &dynsym_idx); | |
850 | if (scn_dynsym == NULL) | |
851 | goto out_elf_end; | |
8ce998d6 | 852 | |
a25e46c4 | 853 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
854 | ".rela.plt", NULL); |
855 | if (scn_plt_rel == NULL) { | |
a25e46c4 | 856 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
857 | ".rel.plt", NULL); |
858 | if (scn_plt_rel == NULL) | |
a25e46c4 | 859 | goto out_elf_end; |
8ce998d6 ACM |
860 | } |
861 | ||
a25e46c4 ACM |
862 | err = -1; |
863 | ||
8ce998d6 | 864 | if (shdr_rel_plt.sh_link != dynsym_idx) |
a25e46c4 | 865 | goto out_elf_end; |
8ce998d6 | 866 | |
a25e46c4 ACM |
867 | if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL) |
868 | goto out_elf_end; | |
8ce998d6 ACM |
869 | |
870 | /* | |
83a0944f | 871 | * Fetch the relocation section to find the idxes to the GOT |
8ce998d6 ACM |
872 | * and the symbols in the .dynsym they refer to. |
873 | */ | |
874 | reldata = elf_getdata(scn_plt_rel, NULL); | |
875 | if (reldata == NULL) | |
a25e46c4 | 876 | goto out_elf_end; |
8ce998d6 ACM |
877 | |
878 | syms = elf_getdata(scn_dynsym, NULL); | |
879 | if (syms == NULL) | |
a25e46c4 | 880 | goto out_elf_end; |
8ce998d6 | 881 | |
a25e46c4 | 882 | scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link); |
8ce998d6 | 883 | if (scn_symstrs == NULL) |
a25e46c4 | 884 | goto out_elf_end; |
8ce998d6 ACM |
885 | |
886 | symstrs = elf_getdata(scn_symstrs, NULL); | |
887 | if (symstrs == NULL) | |
a25e46c4 | 888 | goto out_elf_end; |
8ce998d6 ACM |
889 | |
890 | nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize; | |
891 | plt_offset = shdr_plt.sh_offset; | |
892 | ||
893 | if (shdr_rel_plt.sh_type == SHT_RELA) { | |
894 | GElf_Rela pos_mem, *pos; | |
895 | ||
896 | elf_section__for_each_rela(reldata, pos, pos_mem, idx, | |
897 | nr_rel_entries) { | |
898 | symidx = GELF_R_SYM(pos->r_info); | |
899 | plt_offset += shdr_plt.sh_entsize; | |
900 | gelf_getsym(syms, symidx, &sym); | |
901 | snprintf(sympltname, sizeof(sympltname), | |
902 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
903 | ||
904 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
c408fedf | 905 | STB_GLOBAL, sympltname); |
8ce998d6 | 906 | if (!f) |
a25e46c4 | 907 | goto out_elf_end; |
8ce998d6 | 908 | |
82164161 ACM |
909 | if (filter && filter(map, f)) |
910 | symbol__delete(f); | |
911 | else { | |
6a4694a4 | 912 | symbols__insert(&self->symbols[map->type], f); |
82164161 ACM |
913 | ++nr; |
914 | } | |
8ce998d6 ACM |
915 | } |
916 | } else if (shdr_rel_plt.sh_type == SHT_REL) { | |
917 | GElf_Rel pos_mem, *pos; | |
918 | elf_section__for_each_rel(reldata, pos, pos_mem, idx, | |
919 | nr_rel_entries) { | |
920 | symidx = GELF_R_SYM(pos->r_info); | |
921 | plt_offset += shdr_plt.sh_entsize; | |
922 | gelf_getsym(syms, symidx, &sym); | |
923 | snprintf(sympltname, sizeof(sympltname), | |
924 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
925 | ||
926 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
c408fedf | 927 | STB_GLOBAL, sympltname); |
8ce998d6 | 928 | if (!f) |
a25e46c4 | 929 | goto out_elf_end; |
8ce998d6 | 930 | |
82164161 ACM |
931 | if (filter && filter(map, f)) |
932 | symbol__delete(f); | |
933 | else { | |
6a4694a4 | 934 | symbols__insert(&self->symbols[map->type], f); |
82164161 ACM |
935 | ++nr; |
936 | } | |
8ce998d6 | 937 | } |
8ce998d6 ACM |
938 | } |
939 | ||
a25e46c4 ACM |
940 | err = 0; |
941 | out_elf_end: | |
942 | elf_end(elf); | |
943 | out_close: | |
944 | close(fd); | |
945 | ||
946 | if (err == 0) | |
947 | return nr; | |
948 | out: | |
fe2197b8 ACM |
949 | pr_debug("%s: problems reading %s PLT info.\n", |
950 | __func__, self->long_name); | |
a25e46c4 | 951 | return 0; |
8ce998d6 ACM |
952 | } |
953 | ||
d45868d3 ACM |
954 | static bool elf_sym__is_a(GElf_Sym *self, enum map_type type) |
955 | { | |
956 | switch (type) { | |
957 | case MAP__FUNCTION: | |
958 | return elf_sym__is_function(self); | |
f1dfa0b1 ACM |
959 | case MAP__VARIABLE: |
960 | return elf_sym__is_object(self); | |
d45868d3 ACM |
961 | default: |
962 | return false; | |
963 | } | |
964 | } | |
965 | ||
966 | static bool elf_sec__is_a(GElf_Shdr *self, Elf_Data *secstrs, enum map_type type) | |
967 | { | |
968 | switch (type) { | |
969 | case MAP__FUNCTION: | |
970 | return elf_sec__is_text(self, secstrs); | |
f1dfa0b1 ACM |
971 | case MAP__VARIABLE: |
972 | return elf_sec__is_data(self, secstrs); | |
d45868d3 ACM |
973 | default: |
974 | return false; | |
975 | } | |
976 | } | |
977 | ||
70c3856b EM |
978 | static size_t elf_addr_to_index(Elf *elf, GElf_Addr addr) |
979 | { | |
980 | Elf_Scn *sec = NULL; | |
981 | GElf_Shdr shdr; | |
982 | size_t cnt = 1; | |
983 | ||
984 | while ((sec = elf_nextscn(elf, sec)) != NULL) { | |
985 | gelf_getshdr(sec, &shdr); | |
986 | ||
987 | if ((addr >= shdr.sh_addr) && | |
988 | (addr < (shdr.sh_addr + shdr.sh_size))) | |
989 | return cnt; | |
990 | ||
991 | ++cnt; | |
992 | } | |
993 | ||
994 | return -1; | |
995 | } | |
996 | ||
9de89fe7 | 997 | static int dso__load_sym(struct dso *self, struct map *map, const char *name, |
6da80ce8 DM |
998 | int fd, symbol_filter_t filter, int kmodule, |
999 | int want_symtab) | |
a2928c42 | 1000 | { |
9de89fe7 | 1001 | struct kmap *kmap = self->kernel ? map__kmap(map) : NULL; |
2e538c4a ACM |
1002 | struct map *curr_map = map; |
1003 | struct dso *curr_dso = self; | |
6cfcc53e | 1004 | Elf_Data *symstrs, *secstrs; |
a2928c42 ACM |
1005 | uint32_t nr_syms; |
1006 | int err = -1; | |
83a0944f | 1007 | uint32_t idx; |
a2928c42 | 1008 | GElf_Ehdr ehdr; |
70c3856b EM |
1009 | GElf_Shdr shdr, opdshdr; |
1010 | Elf_Data *syms, *opddata = NULL; | |
a2928c42 | 1011 | GElf_Sym sym; |
70c3856b | 1012 | Elf_Scn *sec, *sec_strndx, *opdsec; |
a2928c42 | 1013 | Elf *elf; |
439d473b | 1014 | int nr = 0; |
70c3856b | 1015 | size_t opdidx = 0; |
a2928c42 | 1016 | |
84087126 | 1017 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a2928c42 | 1018 | if (elf == NULL) { |
8b1389ef | 1019 | pr_debug("%s: cannot read %s ELF file.\n", __func__, name); |
a2928c42 ACM |
1020 | goto out_close; |
1021 | } | |
1022 | ||
1023 | if (gelf_getehdr(elf, &ehdr) == NULL) { | |
8b1389ef | 1024 | pr_debug("%s: cannot get elf header.\n", __func__); |
a2928c42 ACM |
1025 | goto out_elf_end; |
1026 | } | |
1027 | ||
6da80ce8 | 1028 | /* Always reject images with a mismatched build-id: */ |
21916c38 DM |
1029 | if (self->has_build_id) { |
1030 | u8 build_id[BUILD_ID_SIZE]; | |
1031 | ||
1032 | if (elf_read_build_id(elf, build_id, | |
1033 | BUILD_ID_SIZE) != BUILD_ID_SIZE) | |
1034 | goto out_elf_end; | |
1035 | ||
1036 | if (!dso__build_id_equal(self, build_id)) | |
1037 | goto out_elf_end; | |
1038 | } | |
1039 | ||
a2928c42 | 1040 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL); |
8ce998d6 | 1041 | if (sec == NULL) { |
6da80ce8 DM |
1042 | if (want_symtab) |
1043 | goto out_elf_end; | |
1044 | ||
a25e46c4 ACM |
1045 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL); |
1046 | if (sec == NULL) | |
8ce998d6 | 1047 | goto out_elf_end; |
8ce998d6 | 1048 | } |
a2928c42 | 1049 | |
70c3856b EM |
1050 | opdsec = elf_section_by_name(elf, &ehdr, &opdshdr, ".opd", &opdidx); |
1051 | if (opdsec) | |
1052 | opddata = elf_rawdata(opdsec, NULL); | |
1053 | ||
a2928c42 ACM |
1054 | syms = elf_getdata(sec, NULL); |
1055 | if (syms == NULL) | |
1056 | goto out_elf_end; | |
1057 | ||
1058 | sec = elf_getscn(elf, shdr.sh_link); | |
1059 | if (sec == NULL) | |
1060 | goto out_elf_end; | |
1061 | ||
1062 | symstrs = elf_getdata(sec, NULL); | |
1063 | if (symstrs == NULL) | |
1064 | goto out_elf_end; | |
1065 | ||
6cfcc53e MG |
1066 | sec_strndx = elf_getscn(elf, ehdr.e_shstrndx); |
1067 | if (sec_strndx == NULL) | |
1068 | goto out_elf_end; | |
1069 | ||
1070 | secstrs = elf_getdata(sec_strndx, NULL); | |
9b30a26b | 1071 | if (secstrs == NULL) |
6cfcc53e MG |
1072 | goto out_elf_end; |
1073 | ||
a2928c42 ACM |
1074 | nr_syms = shdr.sh_size / shdr.sh_entsize; |
1075 | ||
e9fbc9dc | 1076 | memset(&sym, 0, sizeof(sym)); |
a1645ce1 | 1077 | if (self->kernel == DSO_TYPE_USER) { |
d20ff6bd | 1078 | self->adjust_symbols = (ehdr.e_type == ET_EXEC || |
30d7a77d ACM |
1079 | elf_section_by_name(elf, &ehdr, &shdr, |
1080 | ".gnu.prelink_undo", | |
1081 | NULL) != NULL); | |
d20ff6bd MG |
1082 | } else self->adjust_symbols = 0; |
1083 | ||
83a0944f | 1084 | elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) { |
a2928c42 | 1085 | struct symbol *f; |
56b03f3c | 1086 | const char *elf_name = elf_sym__name(&sym, symstrs); |
2e538c4a | 1087 | char *demangled = NULL; |
6cfcc53e MG |
1088 | int is_label = elf_sym__is_label(&sym); |
1089 | const char *section_name; | |
a2928c42 | 1090 | |
9de89fe7 ACM |
1091 | if (kmap && kmap->ref_reloc_sym && kmap->ref_reloc_sym->name && |
1092 | strcmp(elf_name, kmap->ref_reloc_sym->name) == 0) | |
1093 | kmap->ref_reloc_sym->unrelocated_addr = sym.st_value; | |
56b03f3c | 1094 | |
d45868d3 | 1095 | if (!is_label && !elf_sym__is_a(&sym, map->type)) |
a2928c42 ACM |
1096 | continue; |
1097 | ||
696b97a5 DM |
1098 | /* Reject ARM ELF "mapping symbols": these aren't unique and |
1099 | * don't identify functions, so will confuse the profile | |
1100 | * output: */ | |
1101 | if (ehdr.e_machine == EM_ARM) { | |
1102 | if (!strcmp(elf_name, "$a") || | |
1103 | !strcmp(elf_name, "$d") || | |
1104 | !strcmp(elf_name, "$t")) | |
1105 | continue; | |
1106 | } | |
1107 | ||
70c3856b EM |
1108 | if (opdsec && sym.st_shndx == opdidx) { |
1109 | u32 offset = sym.st_value - opdshdr.sh_addr; | |
1110 | u64 *opd = opddata->d_buf + offset; | |
1111 | sym.st_value = *opd; | |
1112 | sym.st_shndx = elf_addr_to_index(elf, sym.st_value); | |
1113 | } | |
1114 | ||
a2928c42 ACM |
1115 | sec = elf_getscn(elf, sym.st_shndx); |
1116 | if (!sec) | |
1117 | goto out_elf_end; | |
1118 | ||
1119 | gelf_getshdr(sec, &shdr); | |
6cfcc53e | 1120 | |
d45868d3 | 1121 | if (is_label && !elf_sec__is_a(&shdr, secstrs, map->type)) |
6cfcc53e MG |
1122 | continue; |
1123 | ||
1124 | section_name = elf_sec__name(&shdr, secstrs); | |
0b73da3f | 1125 | |
a1645ce1 | 1126 | if (self->kernel != DSO_TYPE_USER || kmodule) { |
2e538c4a ACM |
1127 | char dso_name[PATH_MAX]; |
1128 | ||
1129 | if (strcmp(section_name, | |
b63be8d7 ACM |
1130 | (curr_dso->short_name + |
1131 | self->short_name_len)) == 0) | |
2e538c4a ACM |
1132 | goto new_symbol; |
1133 | ||
1134 | if (strcmp(section_name, ".text") == 0) { | |
1135 | curr_map = map; | |
1136 | curr_dso = self; | |
1137 | goto new_symbol; | |
1138 | } | |
1139 | ||
1140 | snprintf(dso_name, sizeof(dso_name), | |
1141 | "%s%s", self->short_name, section_name); | |
1142 | ||
9de89fe7 | 1143 | curr_map = map_groups__find_by_name(kmap->kmaps, map->type, dso_name); |
2e538c4a ACM |
1144 | if (curr_map == NULL) { |
1145 | u64 start = sym.st_value; | |
1146 | ||
1147 | if (kmodule) | |
1148 | start += map->start + shdr.sh_offset; | |
1149 | ||
00a192b3 | 1150 | curr_dso = dso__new(dso_name); |
2e538c4a ACM |
1151 | if (curr_dso == NULL) |
1152 | goto out_elf_end; | |
a1645ce1 | 1153 | curr_dso->kernel = self->kernel; |
3610583c | 1154 | curr_map = map__new2(start, curr_dso, |
6275ce2d | 1155 | map->type); |
2e538c4a ACM |
1156 | if (curr_map == NULL) { |
1157 | dso__delete(curr_dso); | |
1158 | goto out_elf_end; | |
1159 | } | |
ed52ce2e ACM |
1160 | curr_map->map_ip = identity__map_ip; |
1161 | curr_map->unmap_ip = identity__map_ip; | |
b0a9ab62 | 1162 | curr_dso->origin = self->origin; |
9de89fe7 | 1163 | map_groups__insert(kmap->kmaps, curr_map); |
a1645ce1 | 1164 | dsos__add(&self->node, curr_dso); |
6275ce2d | 1165 | dso__set_loaded(curr_dso, map->type); |
2e538c4a ACM |
1166 | } else |
1167 | curr_dso = curr_map->dso; | |
1168 | ||
1169 | goto new_symbol; | |
af427bf5 ACM |
1170 | } |
1171 | ||
2e538c4a | 1172 | if (curr_dso->adjust_symbols) { |
29a9f66d ACM |
1173 | pr_debug4("%s: adjusting symbol: st_value: %#Lx " |
1174 | "sh_addr: %#Lx sh_offset: %#Lx\n", __func__, | |
1175 | (u64)sym.st_value, (u64)shdr.sh_addr, | |
1176 | (u64)shdr.sh_offset); | |
f5812a7a | 1177 | sym.st_value -= shdr.sh_addr - shdr.sh_offset; |
af427bf5 | 1178 | } |
28ac909b ACM |
1179 | /* |
1180 | * We need to figure out if the object was created from C++ sources | |
1181 | * DWARF DW_compile_unit has this, but we don't always have access | |
1182 | * to it... | |
1183 | */ | |
83a0944f | 1184 | demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI); |
28ac909b | 1185 | if (demangled != NULL) |
83a0944f | 1186 | elf_name = demangled; |
2e538c4a | 1187 | new_symbol: |
c408fedf ACM |
1188 | f = symbol__new(sym.st_value, sym.st_size, |
1189 | GELF_ST_BIND(sym.st_info), elf_name); | |
28ac909b | 1190 | free(demangled); |
a2928c42 ACM |
1191 | if (!f) |
1192 | goto out_elf_end; | |
1193 | ||
2e538c4a | 1194 | if (filter && filter(curr_map, f)) |
00a192b3 | 1195 | symbol__delete(f); |
69ee69f6 | 1196 | else { |
6a4694a4 | 1197 | symbols__insert(&curr_dso->symbols[curr_map->type], f); |
69ee69f6 ACM |
1198 | nr++; |
1199 | } | |
a2928c42 ACM |
1200 | } |
1201 | ||
2e538c4a ACM |
1202 | /* |
1203 | * For misannotated, zeroed, ASM function sizes. | |
1204 | */ | |
6275ce2d | 1205 | if (nr > 0) { |
6a4694a4 | 1206 | symbols__fixup_end(&self->symbols[map->type]); |
6275ce2d ACM |
1207 | if (kmap) { |
1208 | /* | |
1209 | * We need to fixup this here too because we create new | |
1210 | * maps here, for things like vsyscall sections. | |
1211 | */ | |
1212 | __map_groups__fixup_end(kmap->kmaps, map->type); | |
1213 | } | |
1214 | } | |
a2928c42 ACM |
1215 | err = nr; |
1216 | out_elf_end: | |
1217 | elf_end(elf); | |
1218 | out_close: | |
1219 | return err; | |
1220 | } | |
1221 | ||
78075caa ACM |
1222 | static bool dso__build_id_equal(const struct dso *self, u8 *build_id) |
1223 | { | |
1224 | return memcmp(self->build_id, build_id, sizeof(self->build_id)) == 0; | |
1225 | } | |
1226 | ||
a1645ce1 | 1227 | bool __dsos__read_build_ids(struct list_head *head, bool with_hits) |
57f395a7 | 1228 | { |
e30a3d12 | 1229 | bool have_build_id = false; |
57f395a7 FW |
1230 | struct dso *pos; |
1231 | ||
6122e4e4 ACM |
1232 | list_for_each_entry(pos, head, node) { |
1233 | if (with_hits && !pos->hit) | |
1234 | continue; | |
f6e1467d ACM |
1235 | if (pos->has_build_id) { |
1236 | have_build_id = true; | |
1237 | continue; | |
1238 | } | |
e30a3d12 ACM |
1239 | if (filename__read_build_id(pos->long_name, pos->build_id, |
1240 | sizeof(pos->build_id)) > 0) { | |
1241 | have_build_id = true; | |
1242 | pos->has_build_id = true; | |
1243 | } | |
6122e4e4 | 1244 | } |
57f395a7 | 1245 | |
e30a3d12 | 1246 | return have_build_id; |
57f395a7 FW |
1247 | } |
1248 | ||
fd7a346e ACM |
1249 | /* |
1250 | * Align offset to 4 bytes as needed for note name and descriptor data. | |
1251 | */ | |
1252 | #define NOTE_ALIGN(n) (((n) + 3) & -4U) | |
1253 | ||
21916c38 | 1254 | static int elf_read_build_id(Elf *elf, void *bf, size_t size) |
4d1e00a8 | 1255 | { |
21916c38 | 1256 | int err = -1; |
4d1e00a8 ACM |
1257 | GElf_Ehdr ehdr; |
1258 | GElf_Shdr shdr; | |
fd7a346e | 1259 | Elf_Data *data; |
4d1e00a8 | 1260 | Elf_Scn *sec; |
e57cfcda | 1261 | Elf_Kind ek; |
fd7a346e | 1262 | void *ptr; |
4d1e00a8 | 1263 | |
2643ce11 ACM |
1264 | if (size < BUILD_ID_SIZE) |
1265 | goto out; | |
1266 | ||
e57cfcda PE |
1267 | ek = elf_kind(elf); |
1268 | if (ek != ELF_K_ELF) | |
21916c38 | 1269 | goto out; |
e57cfcda | 1270 | |
4d1e00a8 | 1271 | if (gelf_getehdr(elf, &ehdr) == NULL) { |
6beba7ad | 1272 | pr_err("%s: cannot get elf header.\n", __func__); |
21916c38 | 1273 | goto out; |
4d1e00a8 ACM |
1274 | } |
1275 | ||
2643ce11 ACM |
1276 | sec = elf_section_by_name(elf, &ehdr, &shdr, |
1277 | ".note.gnu.build-id", NULL); | |
fd7a346e ACM |
1278 | if (sec == NULL) { |
1279 | sec = elf_section_by_name(elf, &ehdr, &shdr, | |
1280 | ".notes", NULL); | |
1281 | if (sec == NULL) | |
21916c38 | 1282 | goto out; |
fd7a346e | 1283 | } |
4d1e00a8 | 1284 | |
fd7a346e ACM |
1285 | data = elf_getdata(sec, NULL); |
1286 | if (data == NULL) | |
21916c38 | 1287 | goto out; |
fd7a346e ACM |
1288 | |
1289 | ptr = data->d_buf; | |
1290 | while (ptr < (data->d_buf + data->d_size)) { | |
1291 | GElf_Nhdr *nhdr = ptr; | |
1292 | int namesz = NOTE_ALIGN(nhdr->n_namesz), | |
1293 | descsz = NOTE_ALIGN(nhdr->n_descsz); | |
1294 | const char *name; | |
1295 | ||
1296 | ptr += sizeof(*nhdr); | |
1297 | name = ptr; | |
1298 | ptr += namesz; | |
1299 | if (nhdr->n_type == NT_GNU_BUILD_ID && | |
1300 | nhdr->n_namesz == sizeof("GNU")) { | |
1301 | if (memcmp(name, "GNU", sizeof("GNU")) == 0) { | |
1302 | memcpy(bf, ptr, BUILD_ID_SIZE); | |
1303 | err = BUILD_ID_SIZE; | |
1304 | break; | |
1305 | } | |
1306 | } | |
1307 | ptr += descsz; | |
1308 | } | |
21916c38 DM |
1309 | |
1310 | out: | |
1311 | return err; | |
1312 | } | |
1313 | ||
1314 | int filename__read_build_id(const char *filename, void *bf, size_t size) | |
1315 | { | |
1316 | int fd, err = -1; | |
1317 | Elf *elf; | |
1318 | ||
1319 | if (size < BUILD_ID_SIZE) | |
1320 | goto out; | |
1321 | ||
1322 | fd = open(filename, O_RDONLY); | |
1323 | if (fd < 0) | |
1324 | goto out; | |
1325 | ||
1326 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); | |
1327 | if (elf == NULL) { | |
1328 | pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename); | |
1329 | goto out_close; | |
1330 | } | |
1331 | ||
1332 | err = elf_read_build_id(elf, bf, size); | |
1333 | ||
2643ce11 ACM |
1334 | elf_end(elf); |
1335 | out_close: | |
1336 | close(fd); | |
1337 | out: | |
1338 | return err; | |
1339 | } | |
1340 | ||
f1617b40 ACM |
1341 | int sysfs__read_build_id(const char *filename, void *build_id, size_t size) |
1342 | { | |
1343 | int fd, err = -1; | |
1344 | ||
1345 | if (size < BUILD_ID_SIZE) | |
1346 | goto out; | |
1347 | ||
1348 | fd = open(filename, O_RDONLY); | |
1349 | if (fd < 0) | |
1350 | goto out; | |
1351 | ||
1352 | while (1) { | |
1353 | char bf[BUFSIZ]; | |
1354 | GElf_Nhdr nhdr; | |
1355 | int namesz, descsz; | |
1356 | ||
1357 | if (read(fd, &nhdr, sizeof(nhdr)) != sizeof(nhdr)) | |
1358 | break; | |
1359 | ||
fd7a346e ACM |
1360 | namesz = NOTE_ALIGN(nhdr.n_namesz); |
1361 | descsz = NOTE_ALIGN(nhdr.n_descsz); | |
f1617b40 ACM |
1362 | if (nhdr.n_type == NT_GNU_BUILD_ID && |
1363 | nhdr.n_namesz == sizeof("GNU")) { | |
1364 | if (read(fd, bf, namesz) != namesz) | |
1365 | break; | |
1366 | if (memcmp(bf, "GNU", sizeof("GNU")) == 0) { | |
1367 | if (read(fd, build_id, | |
1368 | BUILD_ID_SIZE) == BUILD_ID_SIZE) { | |
1369 | err = 0; | |
1370 | break; | |
1371 | } | |
1372 | } else if (read(fd, bf, descsz) != descsz) | |
1373 | break; | |
1374 | } else { | |
1375 | int n = namesz + descsz; | |
1376 | if (read(fd, bf, n) != n) | |
1377 | break; | |
1378 | } | |
1379 | } | |
1380 | close(fd); | |
1381 | out: | |
1382 | return err; | |
1383 | } | |
1384 | ||
94cb9e38 ACM |
1385 | char dso__symtab_origin(const struct dso *self) |
1386 | { | |
1387 | static const char origin[] = { | |
1388 | [DSO__ORIG_KERNEL] = 'k', | |
1389 | [DSO__ORIG_JAVA_JIT] = 'j', | |
4cf40131 | 1390 | [DSO__ORIG_BUILD_ID_CACHE] = 'B', |
94cb9e38 ACM |
1391 | [DSO__ORIG_FEDORA] = 'f', |
1392 | [DSO__ORIG_UBUNTU] = 'u', | |
1393 | [DSO__ORIG_BUILDID] = 'b', | |
1394 | [DSO__ORIG_DSO] = 'd', | |
439d473b | 1395 | [DSO__ORIG_KMODULE] = 'K', |
a1645ce1 ZY |
1396 | [DSO__ORIG_GUEST_KERNEL] = 'g', |
1397 | [DSO__ORIG_GUEST_KMODULE] = 'G', | |
94cb9e38 ACM |
1398 | }; |
1399 | ||
1400 | if (self == NULL || self->origin == DSO__ORIG_NOT_FOUND) | |
1401 | return '!'; | |
1402 | return origin[self->origin]; | |
1403 | } | |
1404 | ||
9de89fe7 | 1405 | int dso__load(struct dso *self, struct map *map, symbol_filter_t filter) |
a2928c42 | 1406 | { |
4d1e00a8 | 1407 | int size = PATH_MAX; |
c338aee8 | 1408 | char *name; |
a2928c42 ACM |
1409 | int ret = -1; |
1410 | int fd; | |
23346f21 | 1411 | struct machine *machine; |
a1645ce1 | 1412 | const char *root_dir; |
6da80ce8 | 1413 | int want_symtab; |
a2928c42 | 1414 | |
3610583c | 1415 | dso__set_loaded(self, map->type); |
66bd8424 | 1416 | |
a1645ce1 | 1417 | if (self->kernel == DSO_TYPE_KERNEL) |
9de89fe7 | 1418 | return dso__load_kernel_sym(self, map, filter); |
a1645ce1 ZY |
1419 | else if (self->kernel == DSO_TYPE_GUEST_KERNEL) |
1420 | return dso__load_guest_kernel_sym(self, map, filter); | |
1421 | ||
23346f21 ACM |
1422 | if (map->groups && map->groups->machine) |
1423 | machine = map->groups->machine; | |
a1645ce1 | 1424 | else |
23346f21 | 1425 | machine = NULL; |
c338aee8 ACM |
1426 | |
1427 | name = malloc(size); | |
a2928c42 ACM |
1428 | if (!name) |
1429 | return -1; | |
1430 | ||
30d7a77d | 1431 | self->adjust_symbols = 0; |
f5812a7a | 1432 | |
94cb9e38 | 1433 | if (strncmp(self->name, "/tmp/perf-", 10) == 0) { |
6beba7ad | 1434 | ret = dso__load_perf_map(self, map, filter); |
94cb9e38 ACM |
1435 | self->origin = ret > 0 ? DSO__ORIG_JAVA_JIT : |
1436 | DSO__ORIG_NOT_FOUND; | |
1437 | return ret; | |
1438 | } | |
1439 | ||
6da80ce8 DM |
1440 | /* Iterate over candidate debug images. |
1441 | * On the first pass, only load images if they have a full symtab. | |
1442 | * Failing that, do a second pass where we accept .dynsym also | |
1443 | */ | |
1444 | for (self->origin = DSO__ORIG_BUILD_ID_CACHE, want_symtab = 1; | |
1445 | self->origin != DSO__ORIG_NOT_FOUND; | |
1446 | self->origin++) { | |
94cb9e38 | 1447 | switch (self->origin) { |
6da80ce8 DM |
1448 | case DSO__ORIG_BUILD_ID_CACHE: |
1449 | if (dso__build_id_filename(self, name, size) == NULL) | |
1450 | continue; | |
1451 | break; | |
94cb9e38 | 1452 | case DSO__ORIG_FEDORA: |
439d473b ACM |
1453 | snprintf(name, size, "/usr/lib/debug%s.debug", |
1454 | self->long_name); | |
a2928c42 | 1455 | break; |
94cb9e38 | 1456 | case DSO__ORIG_UBUNTU: |
439d473b ACM |
1457 | snprintf(name, size, "/usr/lib/debug%s", |
1458 | self->long_name); | |
a2928c42 | 1459 | break; |
6da80ce8 DM |
1460 | case DSO__ORIG_BUILDID: { |
1461 | char build_id_hex[BUILD_ID_SIZE * 2 + 1]; | |
1462 | ||
1463 | if (!self->has_build_id) | |
1464 | continue; | |
1465 | ||
1466 | build_id__sprintf(self->build_id, | |
1467 | sizeof(self->build_id), | |
1468 | build_id_hex); | |
1469 | snprintf(name, size, | |
1470 | "/usr/lib/debug/.build-id/%.2s/%s.debug", | |
1471 | build_id_hex, build_id_hex + 2); | |
4d1e00a8 | 1472 | } |
6da80ce8 | 1473 | break; |
94cb9e38 | 1474 | case DSO__ORIG_DSO: |
439d473b | 1475 | snprintf(name, size, "%s", self->long_name); |
a2928c42 | 1476 | break; |
a1645ce1 | 1477 | case DSO__ORIG_GUEST_KMODULE: |
23346f21 ACM |
1478 | if (map->groups && map->groups->machine) |
1479 | root_dir = map->groups->machine->root_dir; | |
a1645ce1 ZY |
1480 | else |
1481 | root_dir = ""; | |
1482 | snprintf(name, size, "%s%s", root_dir, self->long_name); | |
1483 | break; | |
a2928c42 ACM |
1484 | |
1485 | default: | |
6da80ce8 DM |
1486 | /* |
1487 | * If we wanted a full symtab but no image had one, | |
1488 | * relax our requirements and repeat the search. | |
1489 | */ | |
1490 | if (want_symtab) { | |
1491 | want_symtab = 0; | |
1492 | self->origin = DSO__ORIG_BUILD_ID_CACHE; | |
1493 | } else | |
1494 | continue; | |
a2928c42 | 1495 | } |
6da80ce8 DM |
1496 | |
1497 | /* Name is now the name of the next image to try */ | |
a2928c42 | 1498 | fd = open(name, O_RDONLY); |
6da80ce8 DM |
1499 | if (fd < 0) |
1500 | continue; | |
a2928c42 | 1501 | |
6da80ce8 DM |
1502 | ret = dso__load_sym(self, map, name, fd, filter, 0, |
1503 | want_symtab); | |
1504 | close(fd); | |
a2928c42 | 1505 | |
6da80ce8 DM |
1506 | /* |
1507 | * Some people seem to have debuginfo files _WITHOUT_ debug | |
1508 | * info!?!? | |
1509 | */ | |
1510 | if (!ret) | |
1511 | continue; | |
a2928c42 | 1512 | |
6da80ce8 DM |
1513 | if (ret > 0) { |
1514 | int nr_plt = dso__synthesize_plt_symbols(self, map, filter); | |
1515 | if (nr_plt > 0) | |
1516 | ret += nr_plt; | |
1517 | break; | |
1518 | } | |
a25e46c4 | 1519 | } |
6da80ce8 | 1520 | |
a2928c42 | 1521 | free(name); |
1340e6bb ACM |
1522 | if (ret < 0 && strstr(self->name, " (deleted)") != NULL) |
1523 | return 0; | |
a2928c42 ACM |
1524 | return ret; |
1525 | } | |
1526 | ||
79406cd7 ACM |
1527 | struct map *map_groups__find_by_name(struct map_groups *self, |
1528 | enum map_type type, const char *name) | |
439d473b ACM |
1529 | { |
1530 | struct rb_node *nd; | |
1531 | ||
79406cd7 | 1532 | for (nd = rb_first(&self->maps[type]); nd; nd = rb_next(nd)) { |
439d473b ACM |
1533 | struct map *map = rb_entry(nd, struct map, rb_node); |
1534 | ||
b7cece76 | 1535 | if (map->dso && strcmp(map->dso->short_name, name) == 0) |
439d473b ACM |
1536 | return map; |
1537 | } | |
1538 | ||
1539 | return NULL; | |
1540 | } | |
1541 | ||
a1645ce1 ZY |
1542 | static int dso__kernel_module_get_build_id(struct dso *self, |
1543 | const char *root_dir) | |
b7cece76 ACM |
1544 | { |
1545 | char filename[PATH_MAX]; | |
1546 | /* | |
1547 | * kernel module short names are of the form "[module]" and | |
1548 | * we need just "module" here. | |
1549 | */ | |
1550 | const char *name = self->short_name + 1; | |
1551 | ||
1552 | snprintf(filename, sizeof(filename), | |
a1645ce1 ZY |
1553 | "%s/sys/module/%.*s/notes/.note.gnu.build-id", |
1554 | root_dir, (int)strlen(name) - 1, name); | |
b7cece76 ACM |
1555 | |
1556 | if (sysfs__read_build_id(filename, self->build_id, | |
1557 | sizeof(self->build_id)) == 0) | |
1558 | self->has_build_id = true; | |
1559 | ||
1560 | return 0; | |
1561 | } | |
1562 | ||
a1645ce1 ZY |
1563 | static int map_groups__set_modules_path_dir(struct map_groups *self, |
1564 | const char *dir_name) | |
6cfcc53e | 1565 | { |
439d473b | 1566 | struct dirent *dent; |
5aab621b | 1567 | DIR *dir = opendir(dir_name); |
74534341 | 1568 | int ret = 0; |
6cfcc53e | 1569 | |
439d473b | 1570 | if (!dir) { |
5aab621b | 1571 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); |
439d473b ACM |
1572 | return -1; |
1573 | } | |
6cfcc53e | 1574 | |
439d473b ACM |
1575 | while ((dent = readdir(dir)) != NULL) { |
1576 | char path[PATH_MAX]; | |
a1645ce1 ZY |
1577 | struct stat st; |
1578 | ||
1579 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
1580 | sprintf(path, "%s/%s", dir_name, dent->d_name); | |
1581 | if (stat(path, &st)) | |
1582 | continue; | |
439d473b | 1583 | |
a1645ce1 | 1584 | if (S_ISDIR(st.st_mode)) { |
439d473b ACM |
1585 | if (!strcmp(dent->d_name, ".") || |
1586 | !strcmp(dent->d_name, "..")) | |
1587 | continue; | |
1588 | ||
1589 | snprintf(path, sizeof(path), "%s/%s", | |
5aab621b | 1590 | dir_name, dent->d_name); |
74534341 GJ |
1591 | ret = map_groups__set_modules_path_dir(self, path); |
1592 | if (ret < 0) | |
1593 | goto out; | |
439d473b ACM |
1594 | } else { |
1595 | char *dot = strrchr(dent->d_name, '.'), | |
1596 | dso_name[PATH_MAX]; | |
1597 | struct map *map; | |
cfc10d3b | 1598 | char *long_name; |
439d473b ACM |
1599 | |
1600 | if (dot == NULL || strcmp(dot, ".ko")) | |
1601 | continue; | |
1602 | snprintf(dso_name, sizeof(dso_name), "[%.*s]", | |
1603 | (int)(dot - dent->d_name), dent->d_name); | |
1604 | ||
a2a99e8e | 1605 | strxfrchar(dso_name, '-', '_'); |
9de89fe7 | 1606 | map = map_groups__find_by_name(self, MAP__FUNCTION, dso_name); |
439d473b ACM |
1607 | if (map == NULL) |
1608 | continue; | |
1609 | ||
1610 | snprintf(path, sizeof(path), "%s/%s", | |
5aab621b | 1611 | dir_name, dent->d_name); |
439d473b | 1612 | |
cfc10d3b | 1613 | long_name = strdup(path); |
74534341 GJ |
1614 | if (long_name == NULL) { |
1615 | ret = -1; | |
1616 | goto out; | |
1617 | } | |
cfc10d3b | 1618 | dso__set_long_name(map->dso, long_name); |
6e406257 | 1619 | map->dso->lname_alloc = 1; |
a1645ce1 | 1620 | dso__kernel_module_get_build_id(map->dso, ""); |
439d473b | 1621 | } |
439d473b | 1622 | } |
6cfcc53e | 1623 | |
74534341 | 1624 | out: |
439d473b | 1625 | closedir(dir); |
74534341 | 1626 | return ret; |
439d473b | 1627 | } |
6cfcc53e | 1628 | |
a1645ce1 | 1629 | static char *get_kernel_version(const char *root_dir) |
439d473b | 1630 | { |
a1645ce1 ZY |
1631 | char version[PATH_MAX]; |
1632 | FILE *file; | |
1633 | char *name, *tmp; | |
1634 | const char *prefix = "Linux version "; | |
1635 | ||
1636 | sprintf(version, "%s/proc/version", root_dir); | |
1637 | file = fopen(version, "r"); | |
1638 | if (!file) | |
1639 | return NULL; | |
1640 | ||
1641 | version[0] = '\0'; | |
1642 | tmp = fgets(version, sizeof(version), file); | |
1643 | fclose(file); | |
1644 | ||
1645 | name = strstr(version, prefix); | |
1646 | if (!name) | |
1647 | return NULL; | |
1648 | name += strlen(prefix); | |
1649 | tmp = strchr(name, ' '); | |
1650 | if (tmp) | |
1651 | *tmp = '\0'; | |
1652 | ||
1653 | return strdup(name); | |
1654 | } | |
1655 | ||
d28c6223 | 1656 | static int machine__set_modules_path(struct machine *self) |
a1645ce1 ZY |
1657 | { |
1658 | char *version; | |
439d473b | 1659 | char modules_path[PATH_MAX]; |
6cfcc53e | 1660 | |
d28c6223 | 1661 | version = get_kernel_version(self->root_dir); |
a1645ce1 | 1662 | if (!version) |
439d473b | 1663 | return -1; |
6cfcc53e | 1664 | |
a1645ce1 | 1665 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s/kernel", |
d28c6223 | 1666 | self->root_dir, version); |
a1645ce1 | 1667 | free(version); |
6cfcc53e | 1668 | |
d28c6223 | 1669 | return map_groups__set_modules_path_dir(&self->kmaps, modules_path); |
6cfcc53e MG |
1670 | } |
1671 | ||
439d473b ACM |
1672 | /* |
1673 | * Constructor variant for modules (where we know from /proc/modules where | |
1674 | * they are loaded) and for vmlinux, where only after we load all the | |
1675 | * symbols we'll know where it starts and ends. | |
1676 | */ | |
3610583c | 1677 | static struct map *map__new2(u64 start, struct dso *dso, enum map_type type) |
6cfcc53e | 1678 | { |
5aab621b ACM |
1679 | struct map *self = calloc(1, (sizeof(*self) + |
1680 | (dso->kernel ? sizeof(struct kmap) : 0))); | |
439d473b | 1681 | if (self != NULL) { |
439d473b | 1682 | /* |
afb7b4f0 | 1683 | * ->end will be filled after we load all the symbols |
439d473b | 1684 | */ |
3610583c | 1685 | map__init(self, type, start, 0, 0, dso); |
439d473b | 1686 | } |
afb7b4f0 | 1687 | |
439d473b ACM |
1688 | return self; |
1689 | } | |
1690 | ||
d28c6223 ACM |
1691 | struct map *machine__new_module(struct machine *self, u64 start, |
1692 | const char *filename) | |
b7cece76 ACM |
1693 | { |
1694 | struct map *map; | |
d28c6223 | 1695 | struct dso *dso = __dsos__findnew(&self->kernel_dsos, filename); |
b7cece76 ACM |
1696 | |
1697 | if (dso == NULL) | |
1698 | return NULL; | |
1699 | ||
1700 | map = map__new2(start, dso, MAP__FUNCTION); | |
1701 | if (map == NULL) | |
1702 | return NULL; | |
1703 | ||
d28c6223 | 1704 | if (machine__is_host(self)) |
a1645ce1 ZY |
1705 | dso->origin = DSO__ORIG_KMODULE; |
1706 | else | |
1707 | dso->origin = DSO__ORIG_GUEST_KMODULE; | |
d28c6223 | 1708 | map_groups__insert(&self->kmaps, map); |
b7cece76 ACM |
1709 | return map; |
1710 | } | |
1711 | ||
d28c6223 | 1712 | static int machine__create_modules(struct machine *self) |
439d473b ACM |
1713 | { |
1714 | char *line = NULL; | |
1715 | size_t n; | |
a1645ce1 | 1716 | FILE *file; |
439d473b | 1717 | struct map *map; |
a1645ce1 ZY |
1718 | const char *modules; |
1719 | char path[PATH_MAX]; | |
1720 | ||
d28c6223 | 1721 | if (machine__is_default_guest(self)) |
a1645ce1 ZY |
1722 | modules = symbol_conf.default_guest_modules; |
1723 | else { | |
d28c6223 | 1724 | sprintf(path, "%s/proc/modules", self->root_dir); |
a1645ce1 ZY |
1725 | modules = path; |
1726 | } | |
6cfcc53e | 1727 | |
a1645ce1 | 1728 | file = fopen(modules, "r"); |
439d473b ACM |
1729 | if (file == NULL) |
1730 | return -1; | |
6cfcc53e | 1731 | |
439d473b ACM |
1732 | while (!feof(file)) { |
1733 | char name[PATH_MAX]; | |
1734 | u64 start; | |
439d473b ACM |
1735 | char *sep; |
1736 | int line_len; | |
6cfcc53e | 1737 | |
439d473b ACM |
1738 | line_len = getline(&line, &n, file); |
1739 | if (line_len < 0) | |
1740 | break; | |
1741 | ||
1742 | if (!line) | |
1743 | goto out_failure; | |
1744 | ||
1745 | line[--line_len] = '\0'; /* \n */ | |
1746 | ||
1747 | sep = strrchr(line, 'x'); | |
1748 | if (sep == NULL) | |
1749 | continue; | |
1750 | ||
1751 | hex2u64(sep + 1, &start); | |
1752 | ||
1753 | sep = strchr(line, ' '); | |
1754 | if (sep == NULL) | |
1755 | continue; | |
1756 | ||
1757 | *sep = '\0'; | |
1758 | ||
1759 | snprintf(name, sizeof(name), "[%s]", line); | |
d28c6223 | 1760 | map = machine__new_module(self, start, name); |
b7cece76 | 1761 | if (map == NULL) |
439d473b | 1762 | goto out_delete_line; |
d28c6223 | 1763 | dso__kernel_module_get_build_id(map->dso, self->root_dir); |
6cfcc53e | 1764 | } |
439d473b ACM |
1765 | |
1766 | free(line); | |
1767 | fclose(file); | |
1768 | ||
d28c6223 | 1769 | return machine__set_modules_path(self); |
439d473b ACM |
1770 | |
1771 | out_delete_line: | |
1772 | free(line); | |
1773 | out_failure: | |
1774 | return -1; | |
6cfcc53e MG |
1775 | } |
1776 | ||
9958e1f0 | 1777 | static int dso__load_vmlinux(struct dso *self, struct map *map, |
6beba7ad | 1778 | const char *vmlinux, symbol_filter_t filter) |
a2928c42 | 1779 | { |
fbd733b8 | 1780 | int err = -1, fd; |
a2928c42 | 1781 | |
fbd733b8 | 1782 | fd = open(vmlinux, O_RDONLY); |
a2928c42 ACM |
1783 | if (fd < 0) |
1784 | return -1; | |
1785 | ||
3610583c | 1786 | dso__set_loaded(self, map->type); |
6da80ce8 | 1787 | err = dso__load_sym(self, map, vmlinux, fd, filter, 0, 0); |
a2928c42 ACM |
1788 | close(fd); |
1789 | ||
3846df2e ACM |
1790 | if (err > 0) |
1791 | pr_debug("Using %s for symbols\n", vmlinux); | |
1792 | ||
a2928c42 ACM |
1793 | return err; |
1794 | } | |
1795 | ||
a19afe46 | 1796 | int dso__load_vmlinux_path(struct dso *self, struct map *map, |
9de89fe7 | 1797 | symbol_filter_t filter) |
a19afe46 ACM |
1798 | { |
1799 | int i, err = 0; | |
5ad90e4e | 1800 | char *filename; |
a19afe46 ACM |
1801 | |
1802 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", | |
5ad90e4e ACM |
1803 | vmlinux_path__nr_entries + 1); |
1804 | ||
1805 | filename = dso__build_id_filename(self, NULL, 0); | |
1806 | if (filename != NULL) { | |
1807 | err = dso__load_vmlinux(self, map, filename, filter); | |
1808 | if (err > 0) { | |
1809 | dso__set_long_name(self, filename); | |
1810 | goto out; | |
1811 | } | |
1812 | free(filename); | |
1813 | } | |
a19afe46 ACM |
1814 | |
1815 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { | |
9de89fe7 | 1816 | err = dso__load_vmlinux(self, map, vmlinux_path[i], filter); |
a19afe46 | 1817 | if (err > 0) { |
a19afe46 ACM |
1818 | dso__set_long_name(self, strdup(vmlinux_path[i])); |
1819 | break; | |
1820 | } | |
1821 | } | |
5ad90e4e | 1822 | out: |
a19afe46 ACM |
1823 | return err; |
1824 | } | |
1825 | ||
c338aee8 | 1826 | static int dso__load_kernel_sym(struct dso *self, struct map *map, |
9de89fe7 | 1827 | symbol_filter_t filter) |
a827c875 | 1828 | { |
cc612d81 | 1829 | int err; |
9e201442 ACM |
1830 | const char *kallsyms_filename = NULL; |
1831 | char *kallsyms_allocated_filename = NULL; | |
dc8d6ab2 | 1832 | /* |
b226a5a7 DA |
1833 | * Step 1: if the user specified a kallsyms or vmlinux filename, use |
1834 | * it and only it, reporting errors to the user if it cannot be used. | |
dc8d6ab2 ACM |
1835 | * |
1836 | * For instance, try to analyse an ARM perf.data file _without_ a | |
1837 | * build-id, or if the user specifies the wrong path to the right | |
1838 | * vmlinux file, obviously we can't fallback to another vmlinux (a | |
1839 | * x86_86 one, on the machine where analysis is being performed, say), | |
1840 | * or worse, /proc/kallsyms. | |
1841 | * | |
1842 | * If the specified file _has_ a build-id and there is a build-id | |
1843 | * section in the perf.data file, we will still do the expected | |
1844 | * validation in dso__load_vmlinux and will bail out if they don't | |
1845 | * match. | |
1846 | */ | |
b226a5a7 DA |
1847 | if (symbol_conf.kallsyms_name != NULL) { |
1848 | kallsyms_filename = symbol_conf.kallsyms_name; | |
1849 | goto do_kallsyms; | |
1850 | } | |
1851 | ||
dc8d6ab2 | 1852 | if (symbol_conf.vmlinux_name != NULL) { |
9de89fe7 | 1853 | err = dso__load_vmlinux(self, map, |
dc8d6ab2 | 1854 | symbol_conf.vmlinux_name, filter); |
e7dadc00 ACM |
1855 | if (err > 0) { |
1856 | dso__set_long_name(self, | |
1857 | strdup(symbol_conf.vmlinux_name)); | |
1858 | goto out_fixup; | |
1859 | } | |
1860 | return err; | |
dc8d6ab2 | 1861 | } |
cc612d81 ACM |
1862 | |
1863 | if (vmlinux_path != NULL) { | |
9de89fe7 | 1864 | err = dso__load_vmlinux_path(self, map, filter); |
a19afe46 ACM |
1865 | if (err > 0) |
1866 | goto out_fixup; | |
cc612d81 ACM |
1867 | } |
1868 | ||
b7cece76 ACM |
1869 | /* |
1870 | * Say the kernel DSO was created when processing the build-id header table, | |
1871 | * we have a build-id, so check if it is the same as the running kernel, | |
1872 | * using it if it is. | |
1873 | */ | |
1874 | if (self->has_build_id) { | |
1875 | u8 kallsyms_build_id[BUILD_ID_SIZE]; | |
9e201442 | 1876 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; |
b7cece76 ACM |
1877 | |
1878 | if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id, | |
8d0591f6 | 1879 | sizeof(kallsyms_build_id)) == 0) { |
9e201442 ACM |
1880 | if (dso__build_id_equal(self, kallsyms_build_id)) { |
1881 | kallsyms_filename = "/proc/kallsyms"; | |
8d0591f6 | 1882 | goto do_kallsyms; |
9e201442 | 1883 | } |
8d0591f6 | 1884 | } |
dc8d6ab2 ACM |
1885 | /* |
1886 | * Now look if we have it on the build-id cache in | |
1887 | * $HOME/.debug/[kernel.kallsyms]. | |
1888 | */ | |
9e201442 ACM |
1889 | build_id__sprintf(self->build_id, sizeof(self->build_id), |
1890 | sbuild_id); | |
1891 | ||
1892 | if (asprintf(&kallsyms_allocated_filename, | |
1893 | "%s/.debug/[kernel.kallsyms]/%s", | |
3846df2e ACM |
1894 | getenv("HOME"), sbuild_id) == -1) { |
1895 | pr_err("Not enough memory for kallsyms file lookup\n"); | |
dc8d6ab2 | 1896 | return -1; |
3846df2e | 1897 | } |
dc8d6ab2 | 1898 | |
19fc2ded ACM |
1899 | kallsyms_filename = kallsyms_allocated_filename; |
1900 | ||
dc8d6ab2 | 1901 | if (access(kallsyms_filename, F_OK)) { |
3846df2e ACM |
1902 | pr_err("No kallsyms or vmlinux with build-id %s " |
1903 | "was found\n", sbuild_id); | |
9e201442 | 1904 | free(kallsyms_allocated_filename); |
dc8d6ab2 | 1905 | return -1; |
9e201442 | 1906 | } |
dc8d6ab2 ACM |
1907 | } else { |
1908 | /* | |
1909 | * Last resort, if we don't have a build-id and couldn't find | |
1910 | * any vmlinux file, try the running kernel kallsyms table. | |
1911 | */ | |
9e201442 | 1912 | kallsyms_filename = "/proc/kallsyms"; |
9e201442 | 1913 | } |
439d473b | 1914 | |
cc612d81 | 1915 | do_kallsyms: |
9de89fe7 | 1916 | err = dso__load_kallsyms(self, kallsyms_filename, map, filter); |
3846df2e ACM |
1917 | if (err > 0) |
1918 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
dc8d6ab2 | 1919 | free(kallsyms_allocated_filename); |
439d473b ACM |
1920 | |
1921 | if (err > 0) { | |
cc612d81 | 1922 | out_fixup: |
e1c7c6a4 | 1923 | if (kallsyms_filename != NULL) |
dc8d6ab2 | 1924 | dso__set_long_name(self, strdup("[kernel.kallsyms]")); |
6a4694a4 ACM |
1925 | map__fixup_start(map); |
1926 | map__fixup_end(map); | |
439d473b | 1927 | } |
94cb9e38 | 1928 | |
a827c875 ACM |
1929 | return err; |
1930 | } | |
1931 | ||
a1645ce1 ZY |
1932 | static int dso__load_guest_kernel_sym(struct dso *self, struct map *map, |
1933 | symbol_filter_t filter) | |
1934 | { | |
1935 | int err; | |
1936 | const char *kallsyms_filename = NULL; | |
23346f21 | 1937 | struct machine *machine; |
a1645ce1 ZY |
1938 | char path[PATH_MAX]; |
1939 | ||
1940 | if (!map->groups) { | |
1941 | pr_debug("Guest kernel map hasn't the point to groups\n"); | |
1942 | return -1; | |
1943 | } | |
23346f21 | 1944 | machine = map->groups->machine; |
a1645ce1 | 1945 | |
23346f21 | 1946 | if (machine__is_default_guest(machine)) { |
a1645ce1 ZY |
1947 | /* |
1948 | * if the user specified a vmlinux filename, use it and only | |
1949 | * it, reporting errors to the user if it cannot be used. | |
1950 | * Or use file guest_kallsyms inputted by user on commandline | |
1951 | */ | |
1952 | if (symbol_conf.default_guest_vmlinux_name != NULL) { | |
1953 | err = dso__load_vmlinux(self, map, | |
1954 | symbol_conf.default_guest_vmlinux_name, filter); | |
1955 | goto out_try_fixup; | |
1956 | } | |
1957 | ||
1958 | kallsyms_filename = symbol_conf.default_guest_kallsyms; | |
1959 | if (!kallsyms_filename) | |
1960 | return -1; | |
1961 | } else { | |
23346f21 | 1962 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); |
a1645ce1 ZY |
1963 | kallsyms_filename = path; |
1964 | } | |
1965 | ||
1966 | err = dso__load_kallsyms(self, kallsyms_filename, map, filter); | |
1967 | if (err > 0) | |
1968 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
1969 | ||
1970 | out_try_fixup: | |
1971 | if (err > 0) { | |
1972 | if (kallsyms_filename != NULL) { | |
48ea8f54 | 1973 | machine__mmap_name(machine, path, sizeof(path)); |
23346f21 | 1974 | dso__set_long_name(self, strdup(path)); |
a1645ce1 ZY |
1975 | } |
1976 | map__fixup_start(map); | |
1977 | map__fixup_end(map); | |
1978 | } | |
1979 | ||
1980 | return err; | |
1981 | } | |
cd84c2ac | 1982 | |
b0da954a | 1983 | static void dsos__add(struct list_head *head, struct dso *dso) |
cd84c2ac | 1984 | { |
b0da954a | 1985 | list_add_tail(&dso->node, head); |
cd84c2ac FW |
1986 | } |
1987 | ||
b0da954a | 1988 | static struct dso *dsos__find(struct list_head *head, const char *name) |
cd84c2ac FW |
1989 | { |
1990 | struct dso *pos; | |
1991 | ||
b0da954a | 1992 | list_for_each_entry(pos, head, node) |
cf4e5b08 | 1993 | if (strcmp(pos->long_name, name) == 0) |
cd84c2ac FW |
1994 | return pos; |
1995 | return NULL; | |
1996 | } | |
1997 | ||
a89e5abe | 1998 | struct dso *__dsos__findnew(struct list_head *head, const char *name) |
cd84c2ac | 1999 | { |
a89e5abe | 2000 | struct dso *dso = dsos__find(head, name); |
cd84c2ac | 2001 | |
e4204992 | 2002 | if (!dso) { |
00a192b3 | 2003 | dso = dso__new(name); |
cfc10d3b | 2004 | if (dso != NULL) { |
a89e5abe | 2005 | dsos__add(head, dso); |
cfc10d3b ACM |
2006 | dso__set_basename(dso); |
2007 | } | |
66bd8424 | 2008 | } |
cd84c2ac FW |
2009 | |
2010 | return dso; | |
cd84c2ac FW |
2011 | } |
2012 | ||
1f626bc3 | 2013 | size_t __dsos__fprintf(struct list_head *head, FILE *fp) |
cd84c2ac FW |
2014 | { |
2015 | struct dso *pos; | |
cbf69680 | 2016 | size_t ret = 0; |
cd84c2ac | 2017 | |
95011c60 ACM |
2018 | list_for_each_entry(pos, head, node) { |
2019 | int i; | |
2020 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
cbf69680 | 2021 | ret += dso__fprintf(pos, i, fp); |
95011c60 | 2022 | } |
cbf69680 ACM |
2023 | |
2024 | return ret; | |
cd84c2ac FW |
2025 | } |
2026 | ||
cbf69680 | 2027 | size_t machines__fprintf_dsos(struct rb_root *self, FILE *fp) |
b0da954a | 2028 | { |
a1645ce1 | 2029 | struct rb_node *nd; |
cbf69680 | 2030 | size_t ret = 0; |
a1645ce1 | 2031 | |
cbf69680 | 2032 | for (nd = rb_first(self); nd; nd = rb_next(nd)) { |
23346f21 | 2033 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
cbf69680 ACM |
2034 | ret += __dsos__fprintf(&pos->kernel_dsos, fp); |
2035 | ret += __dsos__fprintf(&pos->user_dsos, fp); | |
a1645ce1 | 2036 | } |
cbf69680 ACM |
2037 | |
2038 | return ret; | |
b0da954a ACM |
2039 | } |
2040 | ||
88d3d9b7 ACM |
2041 | static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp, |
2042 | bool with_hits) | |
9e03eb2d ACM |
2043 | { |
2044 | struct dso *pos; | |
2045 | size_t ret = 0; | |
2046 | ||
b0da954a | 2047 | list_for_each_entry(pos, head, node) { |
88d3d9b7 ACM |
2048 | if (with_hits && !pos->hit) |
2049 | continue; | |
9e03eb2d | 2050 | ret += dso__fprintf_buildid(pos, fp); |
1124ba73 | 2051 | ret += fprintf(fp, " %s\n", pos->long_name); |
9e03eb2d ACM |
2052 | } |
2053 | return ret; | |
2054 | } | |
2055 | ||
f869097e ACM |
2056 | size_t machine__fprintf_dsos_buildid(struct machine *self, FILE *fp, bool with_hits) |
2057 | { | |
2058 | return __dsos__fprintf_buildid(&self->kernel_dsos, fp, with_hits) + | |
2059 | __dsos__fprintf_buildid(&self->user_dsos, fp, with_hits); | |
2060 | } | |
2061 | ||
cbf69680 | 2062 | size_t machines__fprintf_dsos_buildid(struct rb_root *self, FILE *fp, bool with_hits) |
b0da954a | 2063 | { |
a1645ce1 ZY |
2064 | struct rb_node *nd; |
2065 | size_t ret = 0; | |
2066 | ||
cbf69680 | 2067 | for (nd = rb_first(self); nd; nd = rb_next(nd)) { |
23346f21 | 2068 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
f869097e | 2069 | ret += machine__fprintf_dsos_buildid(pos, fp, with_hits); |
a1645ce1 ZY |
2070 | } |
2071 | return ret; | |
b0da954a ACM |
2072 | } |
2073 | ||
fd1d908c ACM |
2074 | struct dso *dso__new_kernel(const char *name) |
2075 | { | |
2076 | struct dso *self = dso__new(name ?: "[kernel.kallsyms]"); | |
2077 | ||
2078 | if (self != NULL) { | |
b63be8d7 | 2079 | dso__set_short_name(self, "[kernel]"); |
a1645ce1 ZY |
2080 | self->kernel = DSO_TYPE_KERNEL; |
2081 | } | |
2082 | ||
2083 | return self; | |
2084 | } | |
2085 | ||
23346f21 | 2086 | static struct dso *dso__new_guest_kernel(struct machine *machine, |
a1645ce1 ZY |
2087 | const char *name) |
2088 | { | |
48ea8f54 ACM |
2089 | char bf[PATH_MAX]; |
2090 | struct dso *self = dso__new(name ?: machine__mmap_name(machine, bf, sizeof(bf))); | |
a1645ce1 | 2091 | |
a1645ce1 ZY |
2092 | if (self != NULL) { |
2093 | dso__set_short_name(self, "[guest.kernel]"); | |
2094 | self->kernel = DSO_TYPE_GUEST_KERNEL; | |
fd1d908c ACM |
2095 | } |
2096 | ||
2097 | return self; | |
2098 | } | |
2099 | ||
23346f21 | 2100 | void dso__read_running_kernel_build_id(struct dso *self, struct machine *machine) |
fd1d908c | 2101 | { |
a1645ce1 ZY |
2102 | char path[PATH_MAX]; |
2103 | ||
23346f21 | 2104 | if (machine__is_default_guest(machine)) |
a1645ce1 | 2105 | return; |
23346f21 | 2106 | sprintf(path, "%s/sys/kernel/notes", machine->root_dir); |
a1645ce1 | 2107 | if (sysfs__read_build_id(path, self->build_id, |
fd1d908c ACM |
2108 | sizeof(self->build_id)) == 0) |
2109 | self->has_build_id = true; | |
2110 | } | |
2111 | ||
5c0541d5 | 2112 | static struct dso *machine__create_kernel(struct machine *self) |
cd84c2ac | 2113 | { |
a1645ce1 ZY |
2114 | const char *vmlinux_name = NULL; |
2115 | struct dso *kernel; | |
cd84c2ac | 2116 | |
5c0541d5 | 2117 | if (machine__is_host(self)) { |
a1645ce1 ZY |
2118 | vmlinux_name = symbol_conf.vmlinux_name; |
2119 | kernel = dso__new_kernel(vmlinux_name); | |
2120 | } else { | |
5c0541d5 | 2121 | if (machine__is_default_guest(self)) |
a1645ce1 | 2122 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; |
5c0541d5 | 2123 | kernel = dso__new_guest_kernel(self, vmlinux_name); |
8d92c02a | 2124 | } |
cd84c2ac | 2125 | |
a1645ce1 | 2126 | if (kernel != NULL) { |
5c0541d5 ACM |
2127 | dso__read_running_kernel_build_id(kernel, self); |
2128 | dsos__add(&self->kernel_dsos, kernel); | |
a1645ce1 | 2129 | } |
f1dfa0b1 | 2130 | return kernel; |
f1dfa0b1 ACM |
2131 | } |
2132 | ||
d28c6223 | 2133 | int __machine__create_kernel_maps(struct machine *self, struct dso *kernel) |
f1dfa0b1 | 2134 | { |
de176489 | 2135 | enum map_type type; |
f1dfa0b1 | 2136 | |
de176489 | 2137 | for (type = 0; type < MAP__NR_TYPES; ++type) { |
9de89fe7 ACM |
2138 | struct kmap *kmap; |
2139 | ||
d28c6223 ACM |
2140 | self->vmlinux_maps[type] = map__new2(0, kernel, type); |
2141 | if (self->vmlinux_maps[type] == NULL) | |
de176489 | 2142 | return -1; |
f1dfa0b1 | 2143 | |
d28c6223 ACM |
2144 | self->vmlinux_maps[type]->map_ip = |
2145 | self->vmlinux_maps[type]->unmap_ip = identity__map_ip; | |
9de89fe7 | 2146 | |
d28c6223 ACM |
2147 | kmap = map__kmap(self->vmlinux_maps[type]); |
2148 | kmap->kmaps = &self->kmaps; | |
2149 | map_groups__insert(&self->kmaps, self->vmlinux_maps[type]); | |
f1dfa0b1 ACM |
2150 | } |
2151 | ||
f1dfa0b1 | 2152 | return 0; |
2446042c ACM |
2153 | } |
2154 | ||
076c6e45 ACM |
2155 | void machine__destroy_kernel_maps(struct machine *self) |
2156 | { | |
2157 | enum map_type type; | |
2158 | ||
2159 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
2160 | struct kmap *kmap; | |
2161 | ||
2162 | if (self->vmlinux_maps[type] == NULL) | |
2163 | continue; | |
2164 | ||
2165 | kmap = map__kmap(self->vmlinux_maps[type]); | |
2166 | map_groups__remove(&self->kmaps, self->vmlinux_maps[type]); | |
2167 | if (kmap->ref_reloc_sym) { | |
2168 | /* | |
2169 | * ref_reloc_sym is shared among all maps, so free just | |
2170 | * on one of them. | |
2171 | */ | |
2172 | if (type == MAP__FUNCTION) { | |
2173 | free((char *)kmap->ref_reloc_sym->name); | |
2174 | kmap->ref_reloc_sym->name = NULL; | |
2175 | free(kmap->ref_reloc_sym); | |
2176 | } | |
2177 | kmap->ref_reloc_sym = NULL; | |
2178 | } | |
2179 | ||
2180 | map__delete(self->vmlinux_maps[type]); | |
2181 | self->vmlinux_maps[type] = NULL; | |
2182 | } | |
2183 | } | |
2184 | ||
5c0541d5 ACM |
2185 | int machine__create_kernel_maps(struct machine *self) |
2186 | { | |
2187 | struct dso *kernel = machine__create_kernel(self); | |
2188 | ||
2189 | if (kernel == NULL || | |
2190 | __machine__create_kernel_maps(self, kernel) < 0) | |
2191 | return -1; | |
2192 | ||
2193 | if (symbol_conf.use_modules && machine__create_modules(self) < 0) | |
2194 | pr_debug("Problems creating module maps, continuing anyway...\n"); | |
2195 | /* | |
2196 | * Now that we have all the maps created, just set the ->end of them: | |
2197 | */ | |
2198 | map_groups__fixup_end(&self->kmaps); | |
2199 | return 0; | |
2200 | } | |
2201 | ||
cc612d81 ACM |
2202 | static void vmlinux_path__exit(void) |
2203 | { | |
2204 | while (--vmlinux_path__nr_entries >= 0) { | |
2205 | free(vmlinux_path[vmlinux_path__nr_entries]); | |
2206 | vmlinux_path[vmlinux_path__nr_entries] = NULL; | |
2207 | } | |
2208 | ||
2209 | free(vmlinux_path); | |
2210 | vmlinux_path = NULL; | |
2211 | } | |
2212 | ||
2213 | static int vmlinux_path__init(void) | |
2214 | { | |
2215 | struct utsname uts; | |
2216 | char bf[PATH_MAX]; | |
2217 | ||
2218 | if (uname(&uts) < 0) | |
2219 | return -1; | |
2220 | ||
2221 | vmlinux_path = malloc(sizeof(char *) * 5); | |
2222 | if (vmlinux_path == NULL) | |
2223 | return -1; | |
2224 | ||
2225 | vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux"); | |
2226 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2227 | goto out_fail; | |
2228 | ++vmlinux_path__nr_entries; | |
2229 | vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux"); | |
2230 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2231 | goto out_fail; | |
2232 | ++vmlinux_path__nr_entries; | |
2233 | snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", uts.release); | |
2234 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2235 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2236 | goto out_fail; | |
2237 | ++vmlinux_path__nr_entries; | |
2238 | snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", uts.release); | |
2239 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2240 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2241 | goto out_fail; | |
2242 | ++vmlinux_path__nr_entries; | |
2243 | snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux", | |
2244 | uts.release); | |
2245 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2246 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2247 | goto out_fail; | |
2248 | ++vmlinux_path__nr_entries; | |
2249 | ||
2250 | return 0; | |
2251 | ||
2252 | out_fail: | |
2253 | vmlinux_path__exit(); | |
2254 | return -1; | |
2255 | } | |
2256 | ||
5ad90e4e | 2257 | size_t machine__fprintf_vmlinux_path(struct machine *self, FILE *fp) |
b0a9ab62 ACM |
2258 | { |
2259 | int i; | |
2260 | size_t printed = 0; | |
5ad90e4e ACM |
2261 | struct dso *kdso = self->vmlinux_maps[MAP__FUNCTION]->dso; |
2262 | ||
2263 | if (kdso->has_build_id) { | |
2264 | char filename[PATH_MAX]; | |
2265 | if (dso__build_id_filename(kdso, filename, sizeof(filename))) | |
2266 | printed += fprintf(fp, "[0] %s\n", filename); | |
2267 | } | |
b0a9ab62 ACM |
2268 | |
2269 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
5ad90e4e ACM |
2270 | printed += fprintf(fp, "[%d] %s\n", |
2271 | i + kdso->has_build_id, vmlinux_path[i]); | |
b0a9ab62 ACM |
2272 | |
2273 | return printed; | |
2274 | } | |
2275 | ||
655000e7 ACM |
2276 | static int setup_list(struct strlist **list, const char *list_str, |
2277 | const char *list_name) | |
2278 | { | |
2279 | if (list_str == NULL) | |
2280 | return 0; | |
2281 | ||
2282 | *list = strlist__new(true, list_str); | |
2283 | if (!*list) { | |
2284 | pr_err("problems parsing %s list\n", list_name); | |
2285 | return -1; | |
2286 | } | |
2287 | return 0; | |
2288 | } | |
2289 | ||
75be6cf4 | 2290 | int symbol__init(void) |
2446042c | 2291 | { |
85e00b55 JZ |
2292 | if (symbol_conf.initialized) |
2293 | return 0; | |
2294 | ||
95011c60 | 2295 | elf_version(EV_CURRENT); |
75be6cf4 ACM |
2296 | if (symbol_conf.sort_by_name) |
2297 | symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - | |
2298 | sizeof(struct symbol)); | |
b32d133a | 2299 | |
75be6cf4 | 2300 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init() < 0) |
2446042c ACM |
2301 | return -1; |
2302 | ||
c410a338 ACM |
2303 | if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { |
2304 | pr_err("'.' is the only non valid --field-separator argument\n"); | |
2305 | return -1; | |
2306 | } | |
2307 | ||
655000e7 ACM |
2308 | if (setup_list(&symbol_conf.dso_list, |
2309 | symbol_conf.dso_list_str, "dso") < 0) | |
2310 | return -1; | |
2311 | ||
2312 | if (setup_list(&symbol_conf.comm_list, | |
2313 | symbol_conf.comm_list_str, "comm") < 0) | |
2314 | goto out_free_dso_list; | |
2315 | ||
2316 | if (setup_list(&symbol_conf.sym_list, | |
2317 | symbol_conf.sym_list_str, "symbol") < 0) | |
2318 | goto out_free_comm_list; | |
2319 | ||
85e00b55 | 2320 | symbol_conf.initialized = true; |
4aa65636 | 2321 | return 0; |
655000e7 ACM |
2322 | |
2323 | out_free_dso_list: | |
2324 | strlist__delete(symbol_conf.dso_list); | |
2325 | out_free_comm_list: | |
2326 | strlist__delete(symbol_conf.comm_list); | |
2327 | return -1; | |
4aa65636 ACM |
2328 | } |
2329 | ||
d65a458b ACM |
2330 | void symbol__exit(void) |
2331 | { | |
85e00b55 JZ |
2332 | if (!symbol_conf.initialized) |
2333 | return; | |
d65a458b ACM |
2334 | strlist__delete(symbol_conf.sym_list); |
2335 | strlist__delete(symbol_conf.dso_list); | |
2336 | strlist__delete(symbol_conf.comm_list); | |
2337 | vmlinux_path__exit(); | |
2338 | symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL; | |
85e00b55 | 2339 | symbol_conf.initialized = false; |
d65a458b ACM |
2340 | } |
2341 | ||
d28c6223 | 2342 | int machines__create_kernel_maps(struct rb_root *self, pid_t pid) |
4aa65636 | 2343 | { |
d28c6223 | 2344 | struct machine *machine = machines__findnew(self, pid); |
9de89fe7 | 2345 | |
23346f21 | 2346 | if (machine == NULL) |
a1645ce1 | 2347 | return -1; |
cc612d81 | 2348 | |
5c0541d5 | 2349 | return machine__create_kernel_maps(machine); |
cd84c2ac | 2350 | } |
5aab621b ACM |
2351 | |
2352 | static int hex(char ch) | |
2353 | { | |
2354 | if ((ch >= '0') && (ch <= '9')) | |
2355 | return ch - '0'; | |
2356 | if ((ch >= 'a') && (ch <= 'f')) | |
2357 | return ch - 'a' + 10; | |
2358 | if ((ch >= 'A') && (ch <= 'F')) | |
2359 | return ch - 'A' + 10; | |
2360 | return -1; | |
2361 | } | |
2362 | ||
2363 | /* | |
2364 | * While we find nice hex chars, build a long_val. | |
2365 | * Return number of chars processed. | |
2366 | */ | |
2367 | int hex2u64(const char *ptr, u64 *long_val) | |
2368 | { | |
2369 | const char *p = ptr; | |
2370 | *long_val = 0; | |
2371 | ||
2372 | while (*p) { | |
2373 | const int hex_val = hex(*p); | |
2374 | ||
2375 | if (hex_val < 0) | |
2376 | break; | |
2377 | ||
2378 | *long_val = (*long_val << 4) | hex_val; | |
2379 | p++; | |
2380 | } | |
2381 | ||
2382 | return p - ptr; | |
2383 | } | |
2384 | ||
2385 | char *strxfrchar(char *s, char from, char to) | |
2386 | { | |
2387 | char *p = s; | |
2388 | ||
2389 | while ((p = strchr(p, from)) != NULL) | |
2390 | *p++ = to; | |
2391 | ||
2392 | return s; | |
2393 | } | |
a1645ce1 | 2394 | |
d28c6223 | 2395 | int machines__create_guest_kernel_maps(struct rb_root *self) |
a1645ce1 ZY |
2396 | { |
2397 | int ret = 0; | |
2398 | struct dirent **namelist = NULL; | |
2399 | int i, items = 0; | |
2400 | char path[PATH_MAX]; | |
2401 | pid_t pid; | |
2402 | ||
2403 | if (symbol_conf.default_guest_vmlinux_name || | |
2404 | symbol_conf.default_guest_modules || | |
2405 | symbol_conf.default_guest_kallsyms) { | |
d28c6223 | 2406 | machines__create_kernel_maps(self, DEFAULT_GUEST_KERNEL_ID); |
a1645ce1 ZY |
2407 | } |
2408 | ||
2409 | if (symbol_conf.guestmount) { | |
2410 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
2411 | if (items <= 0) | |
2412 | return -ENOENT; | |
2413 | for (i = 0; i < items; i++) { | |
2414 | if (!isdigit(namelist[i]->d_name[0])) { | |
2415 | /* Filter out . and .. */ | |
2416 | continue; | |
2417 | } | |
2418 | pid = atoi(namelist[i]->d_name); | |
2419 | sprintf(path, "%s/%s/proc/kallsyms", | |
2420 | symbol_conf.guestmount, | |
2421 | namelist[i]->d_name); | |
2422 | ret = access(path, R_OK); | |
2423 | if (ret) { | |
2424 | pr_debug("Can't access file %s\n", path); | |
2425 | goto failure; | |
2426 | } | |
d28c6223 | 2427 | machines__create_kernel_maps(self, pid); |
a1645ce1 ZY |
2428 | } |
2429 | failure: | |
2430 | free(namelist); | |
2431 | } | |
2432 | ||
2433 | return ret; | |
2434 | } | |
5c0541d5 | 2435 | |
076c6e45 ACM |
2436 | void machines__destroy_guest_kernel_maps(struct rb_root *self) |
2437 | { | |
2438 | struct rb_node *next = rb_first(self); | |
2439 | ||
2440 | while (next) { | |
2441 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
2442 | ||
2443 | next = rb_next(&pos->rb_node); | |
2444 | rb_erase(&pos->rb_node, self); | |
2445 | machine__delete(pos); | |
2446 | } | |
2447 | } | |
2448 | ||
5c0541d5 ACM |
2449 | int machine__load_kallsyms(struct machine *self, const char *filename, |
2450 | enum map_type type, symbol_filter_t filter) | |
2451 | { | |
2452 | struct map *map = self->vmlinux_maps[type]; | |
2453 | int ret = dso__load_kallsyms(map->dso, filename, map, filter); | |
2454 | ||
2455 | if (ret > 0) { | |
2456 | dso__set_loaded(map->dso, type); | |
2457 | /* | |
2458 | * Since /proc/kallsyms will have multiple sessions for the | |
2459 | * kernel, with modules between them, fixup the end of all | |
2460 | * sections. | |
2461 | */ | |
2462 | __map_groups__fixup_end(&self->kmaps, type); | |
2463 | } | |
2464 | ||
2465 | return ret; | |
2466 | } | |
2467 | ||
2468 | int machine__load_vmlinux_path(struct machine *self, enum map_type type, | |
2469 | symbol_filter_t filter) | |
2470 | { | |
2471 | struct map *map = self->vmlinux_maps[type]; | |
2472 | int ret = dso__load_vmlinux_path(map->dso, map, filter); | |
2473 | ||
2474 | if (ret > 0) { | |
2475 | dso__set_loaded(map->dso, type); | |
2476 | map__reloc_vmlinux(map); | |
2477 | } | |
2478 | ||
2479 | return ret; | |
2480 | } |