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 | */ | |
124 | curr->end = ~0UL; | |
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 | 534 | struct symbol *pos; |
8a953312 | 535 | int count = 0, moved = 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 | ||
8a953312 ACM |
593 | if (count == 0) { |
594 | curr_map = map; | |
595 | goto filter_symbol; | |
596 | } | |
597 | ||
a1645ce1 ZY |
598 | if (self->kernel == DSO_TYPE_GUEST_KERNEL) |
599 | snprintf(dso_name, sizeof(dso_name), | |
600 | "[guest.kernel].%d", | |
601 | kernel_range++); | |
602 | else | |
603 | snprintf(dso_name, sizeof(dso_name), | |
604 | "[kernel].%d", | |
605 | kernel_range++); | |
2e538c4a | 606 | |
00a192b3 | 607 | dso = dso__new(dso_name); |
2e538c4a ACM |
608 | if (dso == NULL) |
609 | return -1; | |
610 | ||
a1645ce1 ZY |
611 | dso->kernel = self->kernel; |
612 | ||
4e06255f | 613 | curr_map = map__new2(pos->start, dso, map->type); |
37fe5fcb | 614 | if (curr_map == NULL) { |
2e538c4a ACM |
615 | dso__delete(dso); |
616 | return -1; | |
617 | } | |
a2928c42 | 618 | |
4e06255f | 619 | curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; |
9de89fe7 | 620 | map_groups__insert(kmaps, curr_map); |
2e538c4a ACM |
621 | ++kernel_range; |
622 | } | |
8a953312 | 623 | filter_symbol: |
4e06255f | 624 | if (filter && filter(curr_map, pos)) { |
1de8e245 | 625 | discard_symbol: rb_erase(&pos->rb_node, root); |
00a192b3 | 626 | symbol__delete(pos); |
2e538c4a | 627 | } else { |
4e06255f ACM |
628 | if (curr_map != map) { |
629 | rb_erase(&pos->rb_node, root); | |
630 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
8a953312 ACM |
631 | ++moved; |
632 | } else | |
633 | ++count; | |
9974f496 | 634 | } |
a2928c42 ACM |
635 | } |
636 | ||
a1645ce1 ZY |
637 | if (curr_map != map && |
638 | self->kernel == DSO_TYPE_GUEST_KERNEL && | |
23346f21 | 639 | machine__is_default_guest(kmaps->machine)) { |
a1645ce1 ZY |
640 | dso__set_loaded(curr_map->dso, curr_map->type); |
641 | } | |
642 | ||
8a953312 | 643 | return count + moved; |
2e538c4a | 644 | } |
a2928c42 | 645 | |
9de89fe7 ACM |
646 | int dso__load_kallsyms(struct dso *self, const char *filename, |
647 | struct map *map, symbol_filter_t filter) | |
2e538c4a | 648 | { |
9e201442 | 649 | if (dso__load_all_kallsyms(self, filename, map) < 0) |
2e538c4a ACM |
650 | return -1; |
651 | ||
4e06255f | 652 | symbols__fixup_end(&self->symbols[map->type]); |
a1645ce1 ZY |
653 | if (self->kernel == DSO_TYPE_GUEST_KERNEL) |
654 | self->origin = DSO__ORIG_GUEST_KERNEL; | |
655 | else | |
656 | self->origin = DSO__ORIG_KERNEL; | |
2e538c4a | 657 | |
9de89fe7 | 658 | return dso__split_kallsyms(self, map, filter); |
af427bf5 ACM |
659 | } |
660 | ||
439d473b | 661 | static int dso__load_perf_map(struct dso *self, struct map *map, |
6beba7ad | 662 | symbol_filter_t filter) |
80d496be PE |
663 | { |
664 | char *line = NULL; | |
665 | size_t n; | |
666 | FILE *file; | |
667 | int nr_syms = 0; | |
668 | ||
439d473b | 669 | file = fopen(self->long_name, "r"); |
80d496be PE |
670 | if (file == NULL) |
671 | goto out_failure; | |
672 | ||
673 | while (!feof(file)) { | |
9cffa8d5 | 674 | u64 start, size; |
80d496be PE |
675 | struct symbol *sym; |
676 | int line_len, len; | |
677 | ||
678 | line_len = getline(&line, &n, file); | |
679 | if (line_len < 0) | |
680 | break; | |
681 | ||
682 | if (!line) | |
683 | goto out_failure; | |
684 | ||
685 | line[--line_len] = '\0'; /* \n */ | |
686 | ||
687 | len = hex2u64(line, &start); | |
688 | ||
689 | len++; | |
690 | if (len + 2 >= line_len) | |
691 | continue; | |
692 | ||
693 | len += hex2u64(line + len, &size); | |
694 | ||
695 | len++; | |
696 | if (len + 2 >= line_len) | |
697 | continue; | |
698 | ||
c408fedf | 699 | sym = symbol__new(start, size, STB_GLOBAL, line + len); |
80d496be PE |
700 | |
701 | if (sym == NULL) | |
702 | goto out_delete_line; | |
703 | ||
439d473b | 704 | if (filter && filter(map, sym)) |
00a192b3 | 705 | symbol__delete(sym); |
80d496be | 706 | else { |
6a4694a4 | 707 | symbols__insert(&self->symbols[map->type], sym); |
80d496be PE |
708 | nr_syms++; |
709 | } | |
710 | } | |
711 | ||
712 | free(line); | |
713 | fclose(file); | |
714 | ||
715 | return nr_syms; | |
716 | ||
717 | out_delete_line: | |
718 | free(line); | |
719 | out_failure: | |
720 | return -1; | |
721 | } | |
722 | ||
a2928c42 ACM |
723 | /** |
724 | * elf_symtab__for_each_symbol - iterate thru all the symbols | |
725 | * | |
726 | * @self: struct elf_symtab instance to iterate | |
83a0944f | 727 | * @idx: uint32_t idx |
a2928c42 ACM |
728 | * @sym: GElf_Sym iterator |
729 | */ | |
83a0944f IM |
730 | #define elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) \ |
731 | for (idx = 0, gelf_getsym(syms, idx, &sym);\ | |
732 | idx < nr_syms; \ | |
733 | idx++, gelf_getsym(syms, idx, &sym)) | |
a2928c42 ACM |
734 | |
735 | static inline uint8_t elf_sym__type(const GElf_Sym *sym) | |
736 | { | |
737 | return GELF_ST_TYPE(sym->st_info); | |
738 | } | |
739 | ||
740 | static inline int elf_sym__is_function(const GElf_Sym *sym) | |
741 | { | |
742 | return elf_sym__type(sym) == STT_FUNC && | |
743 | sym->st_name != 0 && | |
81833130 | 744 | sym->st_shndx != SHN_UNDEF; |
a2928c42 ACM |
745 | } |
746 | ||
f1dfa0b1 ACM |
747 | static inline bool elf_sym__is_object(const GElf_Sym *sym) |
748 | { | |
749 | return elf_sym__type(sym) == STT_OBJECT && | |
750 | sym->st_name != 0 && | |
751 | sym->st_shndx != SHN_UNDEF; | |
752 | } | |
753 | ||
6cfcc53e MG |
754 | static inline int elf_sym__is_label(const GElf_Sym *sym) |
755 | { | |
756 | return elf_sym__type(sym) == STT_NOTYPE && | |
757 | sym->st_name != 0 && | |
758 | sym->st_shndx != SHN_UNDEF && | |
759 | sym->st_shndx != SHN_ABS; | |
760 | } | |
761 | ||
762 | static inline const char *elf_sec__name(const GElf_Shdr *shdr, | |
763 | const Elf_Data *secstrs) | |
764 | { | |
765 | return secstrs->d_buf + shdr->sh_name; | |
766 | } | |
767 | ||
768 | static inline int elf_sec__is_text(const GElf_Shdr *shdr, | |
769 | const Elf_Data *secstrs) | |
770 | { | |
771 | return strstr(elf_sec__name(shdr, secstrs), "text") != NULL; | |
772 | } | |
773 | ||
f1dfa0b1 ACM |
774 | static inline bool elf_sec__is_data(const GElf_Shdr *shdr, |
775 | const Elf_Data *secstrs) | |
776 | { | |
777 | return strstr(elf_sec__name(shdr, secstrs), "data") != NULL; | |
778 | } | |
779 | ||
a2928c42 ACM |
780 | static inline const char *elf_sym__name(const GElf_Sym *sym, |
781 | const Elf_Data *symstrs) | |
782 | { | |
783 | return symstrs->d_buf + sym->st_name; | |
784 | } | |
785 | ||
786 | static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, | |
787 | GElf_Shdr *shp, const char *name, | |
83a0944f | 788 | size_t *idx) |
a2928c42 ACM |
789 | { |
790 | Elf_Scn *sec = NULL; | |
791 | size_t cnt = 1; | |
792 | ||
793 | while ((sec = elf_nextscn(elf, sec)) != NULL) { | |
794 | char *str; | |
795 | ||
796 | gelf_getshdr(sec, shp); | |
797 | str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name); | |
798 | if (!strcmp(name, str)) { | |
83a0944f IM |
799 | if (idx) |
800 | *idx = cnt; | |
a2928c42 ACM |
801 | break; |
802 | } | |
803 | ++cnt; | |
804 | } | |
805 | ||
806 | return sec; | |
807 | } | |
808 | ||
8ce998d6 ACM |
809 | #define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \ |
810 | for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \ | |
811 | idx < nr_entries; \ | |
812 | ++idx, pos = gelf_getrel(reldata, idx, &pos_mem)) | |
813 | ||
814 | #define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \ | |
815 | for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \ | |
816 | idx < nr_entries; \ | |
817 | ++idx, pos = gelf_getrela(reldata, idx, &pos_mem)) | |
818 | ||
a25e46c4 ACM |
819 | /* |
820 | * We need to check if we have a .dynsym, so that we can handle the | |
821 | * .plt, synthesizing its symbols, that aren't on the symtabs (be it | |
822 | * .dynsym or .symtab). | |
823 | * And always look at the original dso, not at debuginfo packages, that | |
824 | * have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS). | |
825 | */ | |
82164161 ACM |
826 | static int dso__synthesize_plt_symbols(struct dso *self, struct map *map, |
827 | symbol_filter_t filter) | |
8ce998d6 ACM |
828 | { |
829 | uint32_t nr_rel_entries, idx; | |
830 | GElf_Sym sym; | |
9cffa8d5 | 831 | u64 plt_offset; |
8ce998d6 ACM |
832 | GElf_Shdr shdr_plt; |
833 | struct symbol *f; | |
a25e46c4 | 834 | GElf_Shdr shdr_rel_plt, shdr_dynsym; |
8ce998d6 | 835 | Elf_Data *reldata, *syms, *symstrs; |
a25e46c4 ACM |
836 | Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym; |
837 | size_t dynsym_idx; | |
838 | GElf_Ehdr ehdr; | |
8ce998d6 | 839 | char sympltname[1024]; |
a25e46c4 ACM |
840 | Elf *elf; |
841 | int nr = 0, symidx, fd, err = 0; | |
842 | ||
439d473b | 843 | fd = open(self->long_name, O_RDONLY); |
a25e46c4 ACM |
844 | if (fd < 0) |
845 | goto out; | |
846 | ||
84087126 | 847 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a25e46c4 ACM |
848 | if (elf == NULL) |
849 | goto out_close; | |
850 | ||
851 | if (gelf_getehdr(elf, &ehdr) == NULL) | |
852 | goto out_elf_end; | |
853 | ||
854 | scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym, | |
855 | ".dynsym", &dynsym_idx); | |
856 | if (scn_dynsym == NULL) | |
857 | goto out_elf_end; | |
8ce998d6 | 858 | |
a25e46c4 | 859 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
860 | ".rela.plt", NULL); |
861 | if (scn_plt_rel == NULL) { | |
a25e46c4 | 862 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
863 | ".rel.plt", NULL); |
864 | if (scn_plt_rel == NULL) | |
a25e46c4 | 865 | goto out_elf_end; |
8ce998d6 ACM |
866 | } |
867 | ||
a25e46c4 ACM |
868 | err = -1; |
869 | ||
8ce998d6 | 870 | if (shdr_rel_plt.sh_link != dynsym_idx) |
a25e46c4 | 871 | goto out_elf_end; |
8ce998d6 | 872 | |
a25e46c4 ACM |
873 | if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL) |
874 | goto out_elf_end; | |
8ce998d6 ACM |
875 | |
876 | /* | |
83a0944f | 877 | * Fetch the relocation section to find the idxes to the GOT |
8ce998d6 ACM |
878 | * and the symbols in the .dynsym they refer to. |
879 | */ | |
880 | reldata = elf_getdata(scn_plt_rel, NULL); | |
881 | if (reldata == NULL) | |
a25e46c4 | 882 | goto out_elf_end; |
8ce998d6 ACM |
883 | |
884 | syms = elf_getdata(scn_dynsym, NULL); | |
885 | if (syms == NULL) | |
a25e46c4 | 886 | goto out_elf_end; |
8ce998d6 | 887 | |
a25e46c4 | 888 | scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link); |
8ce998d6 | 889 | if (scn_symstrs == NULL) |
a25e46c4 | 890 | goto out_elf_end; |
8ce998d6 ACM |
891 | |
892 | symstrs = elf_getdata(scn_symstrs, NULL); | |
893 | if (symstrs == NULL) | |
a25e46c4 | 894 | goto out_elf_end; |
8ce998d6 ACM |
895 | |
896 | nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize; | |
897 | plt_offset = shdr_plt.sh_offset; | |
898 | ||
899 | if (shdr_rel_plt.sh_type == SHT_RELA) { | |
900 | GElf_Rela pos_mem, *pos; | |
901 | ||
902 | elf_section__for_each_rela(reldata, pos, pos_mem, idx, | |
903 | nr_rel_entries) { | |
904 | symidx = GELF_R_SYM(pos->r_info); | |
905 | plt_offset += shdr_plt.sh_entsize; | |
906 | gelf_getsym(syms, symidx, &sym); | |
907 | snprintf(sympltname, sizeof(sympltname), | |
908 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
909 | ||
910 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
c408fedf | 911 | STB_GLOBAL, sympltname); |
8ce998d6 | 912 | if (!f) |
a25e46c4 | 913 | goto out_elf_end; |
8ce998d6 | 914 | |
82164161 ACM |
915 | if (filter && filter(map, f)) |
916 | symbol__delete(f); | |
917 | else { | |
6a4694a4 | 918 | symbols__insert(&self->symbols[map->type], f); |
82164161 ACM |
919 | ++nr; |
920 | } | |
8ce998d6 ACM |
921 | } |
922 | } else if (shdr_rel_plt.sh_type == SHT_REL) { | |
923 | GElf_Rel pos_mem, *pos; | |
924 | elf_section__for_each_rel(reldata, pos, pos_mem, idx, | |
925 | nr_rel_entries) { | |
926 | symidx = GELF_R_SYM(pos->r_info); | |
927 | plt_offset += shdr_plt.sh_entsize; | |
928 | gelf_getsym(syms, symidx, &sym); | |
929 | snprintf(sympltname, sizeof(sympltname), | |
930 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
931 | ||
932 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
c408fedf | 933 | STB_GLOBAL, sympltname); |
8ce998d6 | 934 | if (!f) |
a25e46c4 | 935 | goto out_elf_end; |
8ce998d6 | 936 | |
82164161 ACM |
937 | if (filter && filter(map, f)) |
938 | symbol__delete(f); | |
939 | else { | |
6a4694a4 | 940 | symbols__insert(&self->symbols[map->type], f); |
82164161 ACM |
941 | ++nr; |
942 | } | |
8ce998d6 | 943 | } |
8ce998d6 ACM |
944 | } |
945 | ||
a25e46c4 ACM |
946 | err = 0; |
947 | out_elf_end: | |
948 | elf_end(elf); | |
949 | out_close: | |
950 | close(fd); | |
951 | ||
952 | if (err == 0) | |
953 | return nr; | |
954 | out: | |
fe2197b8 ACM |
955 | pr_debug("%s: problems reading %s PLT info.\n", |
956 | __func__, self->long_name); | |
a25e46c4 | 957 | return 0; |
8ce998d6 ACM |
958 | } |
959 | ||
d45868d3 ACM |
960 | static bool elf_sym__is_a(GElf_Sym *self, enum map_type type) |
961 | { | |
962 | switch (type) { | |
963 | case MAP__FUNCTION: | |
964 | return elf_sym__is_function(self); | |
f1dfa0b1 ACM |
965 | case MAP__VARIABLE: |
966 | return elf_sym__is_object(self); | |
d45868d3 ACM |
967 | default: |
968 | return false; | |
969 | } | |
970 | } | |
971 | ||
972 | static bool elf_sec__is_a(GElf_Shdr *self, Elf_Data *secstrs, enum map_type type) | |
973 | { | |
974 | switch (type) { | |
975 | case MAP__FUNCTION: | |
976 | return elf_sec__is_text(self, secstrs); | |
f1dfa0b1 ACM |
977 | case MAP__VARIABLE: |
978 | return elf_sec__is_data(self, secstrs); | |
d45868d3 ACM |
979 | default: |
980 | return false; | |
981 | } | |
982 | } | |
983 | ||
70c3856b EM |
984 | static size_t elf_addr_to_index(Elf *elf, GElf_Addr addr) |
985 | { | |
986 | Elf_Scn *sec = NULL; | |
987 | GElf_Shdr shdr; | |
988 | size_t cnt = 1; | |
989 | ||
990 | while ((sec = elf_nextscn(elf, sec)) != NULL) { | |
991 | gelf_getshdr(sec, &shdr); | |
992 | ||
993 | if ((addr >= shdr.sh_addr) && | |
994 | (addr < (shdr.sh_addr + shdr.sh_size))) | |
995 | return cnt; | |
996 | ||
997 | ++cnt; | |
998 | } | |
999 | ||
1000 | return -1; | |
1001 | } | |
1002 | ||
9de89fe7 | 1003 | static int dso__load_sym(struct dso *self, struct map *map, const char *name, |
6da80ce8 DM |
1004 | int fd, symbol_filter_t filter, int kmodule, |
1005 | int want_symtab) | |
a2928c42 | 1006 | { |
9de89fe7 | 1007 | struct kmap *kmap = self->kernel ? map__kmap(map) : NULL; |
2e538c4a ACM |
1008 | struct map *curr_map = map; |
1009 | struct dso *curr_dso = self; | |
6cfcc53e | 1010 | Elf_Data *symstrs, *secstrs; |
a2928c42 ACM |
1011 | uint32_t nr_syms; |
1012 | int err = -1; | |
83a0944f | 1013 | uint32_t idx; |
a2928c42 | 1014 | GElf_Ehdr ehdr; |
70c3856b EM |
1015 | GElf_Shdr shdr, opdshdr; |
1016 | Elf_Data *syms, *opddata = NULL; | |
a2928c42 | 1017 | GElf_Sym sym; |
70c3856b | 1018 | Elf_Scn *sec, *sec_strndx, *opdsec; |
a2928c42 | 1019 | Elf *elf; |
439d473b | 1020 | int nr = 0; |
70c3856b | 1021 | size_t opdidx = 0; |
a2928c42 | 1022 | |
84087126 | 1023 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a2928c42 | 1024 | if (elf == NULL) { |
8b1389ef | 1025 | pr_debug("%s: cannot read %s ELF file.\n", __func__, name); |
a2928c42 ACM |
1026 | goto out_close; |
1027 | } | |
1028 | ||
1029 | if (gelf_getehdr(elf, &ehdr) == NULL) { | |
8b1389ef | 1030 | pr_debug("%s: cannot get elf header.\n", __func__); |
a2928c42 ACM |
1031 | goto out_elf_end; |
1032 | } | |
1033 | ||
6da80ce8 | 1034 | /* Always reject images with a mismatched build-id: */ |
21916c38 DM |
1035 | if (self->has_build_id) { |
1036 | u8 build_id[BUILD_ID_SIZE]; | |
1037 | ||
1038 | if (elf_read_build_id(elf, build_id, | |
1039 | BUILD_ID_SIZE) != BUILD_ID_SIZE) | |
1040 | goto out_elf_end; | |
1041 | ||
1042 | if (!dso__build_id_equal(self, build_id)) | |
1043 | goto out_elf_end; | |
1044 | } | |
1045 | ||
a2928c42 | 1046 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL); |
8ce998d6 | 1047 | if (sec == NULL) { |
6da80ce8 DM |
1048 | if (want_symtab) |
1049 | goto out_elf_end; | |
1050 | ||
a25e46c4 ACM |
1051 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL); |
1052 | if (sec == NULL) | |
8ce998d6 | 1053 | goto out_elf_end; |
8ce998d6 | 1054 | } |
a2928c42 | 1055 | |
70c3856b EM |
1056 | opdsec = elf_section_by_name(elf, &ehdr, &opdshdr, ".opd", &opdidx); |
1057 | if (opdsec) | |
1058 | opddata = elf_rawdata(opdsec, NULL); | |
1059 | ||
a2928c42 ACM |
1060 | syms = elf_getdata(sec, NULL); |
1061 | if (syms == NULL) | |
1062 | goto out_elf_end; | |
1063 | ||
1064 | sec = elf_getscn(elf, shdr.sh_link); | |
1065 | if (sec == NULL) | |
1066 | goto out_elf_end; | |
1067 | ||
1068 | symstrs = elf_getdata(sec, NULL); | |
1069 | if (symstrs == NULL) | |
1070 | goto out_elf_end; | |
1071 | ||
6cfcc53e MG |
1072 | sec_strndx = elf_getscn(elf, ehdr.e_shstrndx); |
1073 | if (sec_strndx == NULL) | |
1074 | goto out_elf_end; | |
1075 | ||
1076 | secstrs = elf_getdata(sec_strndx, NULL); | |
9b30a26b | 1077 | if (secstrs == NULL) |
6cfcc53e MG |
1078 | goto out_elf_end; |
1079 | ||
a2928c42 ACM |
1080 | nr_syms = shdr.sh_size / shdr.sh_entsize; |
1081 | ||
e9fbc9dc | 1082 | memset(&sym, 0, sizeof(sym)); |
a1645ce1 | 1083 | if (self->kernel == DSO_TYPE_USER) { |
d20ff6bd | 1084 | self->adjust_symbols = (ehdr.e_type == ET_EXEC || |
30d7a77d ACM |
1085 | elf_section_by_name(elf, &ehdr, &shdr, |
1086 | ".gnu.prelink_undo", | |
1087 | NULL) != NULL); | |
d20ff6bd MG |
1088 | } else self->adjust_symbols = 0; |
1089 | ||
83a0944f | 1090 | elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) { |
a2928c42 | 1091 | struct symbol *f; |
56b03f3c | 1092 | const char *elf_name = elf_sym__name(&sym, symstrs); |
2e538c4a | 1093 | char *demangled = NULL; |
6cfcc53e MG |
1094 | int is_label = elf_sym__is_label(&sym); |
1095 | const char *section_name; | |
a2928c42 | 1096 | |
9de89fe7 ACM |
1097 | if (kmap && kmap->ref_reloc_sym && kmap->ref_reloc_sym->name && |
1098 | strcmp(elf_name, kmap->ref_reloc_sym->name) == 0) | |
1099 | kmap->ref_reloc_sym->unrelocated_addr = sym.st_value; | |
56b03f3c | 1100 | |
d45868d3 | 1101 | if (!is_label && !elf_sym__is_a(&sym, map->type)) |
a2928c42 ACM |
1102 | continue; |
1103 | ||
696b97a5 DM |
1104 | /* Reject ARM ELF "mapping symbols": these aren't unique and |
1105 | * don't identify functions, so will confuse the profile | |
1106 | * output: */ | |
1107 | if (ehdr.e_machine == EM_ARM) { | |
1108 | if (!strcmp(elf_name, "$a") || | |
1109 | !strcmp(elf_name, "$d") || | |
1110 | !strcmp(elf_name, "$t")) | |
1111 | continue; | |
1112 | } | |
1113 | ||
70c3856b EM |
1114 | if (opdsec && sym.st_shndx == opdidx) { |
1115 | u32 offset = sym.st_value - opdshdr.sh_addr; | |
1116 | u64 *opd = opddata->d_buf + offset; | |
1117 | sym.st_value = *opd; | |
1118 | sym.st_shndx = elf_addr_to_index(elf, sym.st_value); | |
1119 | } | |
1120 | ||
a2928c42 ACM |
1121 | sec = elf_getscn(elf, sym.st_shndx); |
1122 | if (!sec) | |
1123 | goto out_elf_end; | |
1124 | ||
1125 | gelf_getshdr(sec, &shdr); | |
6cfcc53e | 1126 | |
d45868d3 | 1127 | if (is_label && !elf_sec__is_a(&shdr, secstrs, map->type)) |
6cfcc53e MG |
1128 | continue; |
1129 | ||
1130 | section_name = elf_sec__name(&shdr, secstrs); | |
0b73da3f | 1131 | |
a1645ce1 | 1132 | if (self->kernel != DSO_TYPE_USER || kmodule) { |
2e538c4a ACM |
1133 | char dso_name[PATH_MAX]; |
1134 | ||
1135 | if (strcmp(section_name, | |
b63be8d7 ACM |
1136 | (curr_dso->short_name + |
1137 | self->short_name_len)) == 0) | |
2e538c4a ACM |
1138 | goto new_symbol; |
1139 | ||
1140 | if (strcmp(section_name, ".text") == 0) { | |
1141 | curr_map = map; | |
1142 | curr_dso = self; | |
1143 | goto new_symbol; | |
1144 | } | |
1145 | ||
1146 | snprintf(dso_name, sizeof(dso_name), | |
1147 | "%s%s", self->short_name, section_name); | |
1148 | ||
9de89fe7 | 1149 | curr_map = map_groups__find_by_name(kmap->kmaps, map->type, dso_name); |
2e538c4a ACM |
1150 | if (curr_map == NULL) { |
1151 | u64 start = sym.st_value; | |
1152 | ||
1153 | if (kmodule) | |
1154 | start += map->start + shdr.sh_offset; | |
1155 | ||
00a192b3 | 1156 | curr_dso = dso__new(dso_name); |
2e538c4a ACM |
1157 | if (curr_dso == NULL) |
1158 | goto out_elf_end; | |
a1645ce1 | 1159 | curr_dso->kernel = self->kernel; |
3610583c | 1160 | curr_map = map__new2(start, curr_dso, |
6275ce2d | 1161 | map->type); |
2e538c4a ACM |
1162 | if (curr_map == NULL) { |
1163 | dso__delete(curr_dso); | |
1164 | goto out_elf_end; | |
1165 | } | |
ed52ce2e ACM |
1166 | curr_map->map_ip = identity__map_ip; |
1167 | curr_map->unmap_ip = identity__map_ip; | |
b0a9ab62 | 1168 | curr_dso->origin = self->origin; |
9de89fe7 | 1169 | map_groups__insert(kmap->kmaps, curr_map); |
a1645ce1 | 1170 | dsos__add(&self->node, curr_dso); |
6275ce2d | 1171 | dso__set_loaded(curr_dso, map->type); |
2e538c4a ACM |
1172 | } else |
1173 | curr_dso = curr_map->dso; | |
1174 | ||
1175 | goto new_symbol; | |
af427bf5 ACM |
1176 | } |
1177 | ||
2e538c4a | 1178 | if (curr_dso->adjust_symbols) { |
29a9f66d ACM |
1179 | pr_debug4("%s: adjusting symbol: st_value: %#Lx " |
1180 | "sh_addr: %#Lx sh_offset: %#Lx\n", __func__, | |
1181 | (u64)sym.st_value, (u64)shdr.sh_addr, | |
1182 | (u64)shdr.sh_offset); | |
f5812a7a | 1183 | sym.st_value -= shdr.sh_addr - shdr.sh_offset; |
af427bf5 | 1184 | } |
28ac909b ACM |
1185 | /* |
1186 | * We need to figure out if the object was created from C++ sources | |
1187 | * DWARF DW_compile_unit has this, but we don't always have access | |
1188 | * to it... | |
1189 | */ | |
83a0944f | 1190 | demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI); |
28ac909b | 1191 | if (demangled != NULL) |
83a0944f | 1192 | elf_name = demangled; |
2e538c4a | 1193 | new_symbol: |
c408fedf ACM |
1194 | f = symbol__new(sym.st_value, sym.st_size, |
1195 | GELF_ST_BIND(sym.st_info), elf_name); | |
28ac909b | 1196 | free(demangled); |
a2928c42 ACM |
1197 | if (!f) |
1198 | goto out_elf_end; | |
1199 | ||
2e538c4a | 1200 | if (filter && filter(curr_map, f)) |
00a192b3 | 1201 | symbol__delete(f); |
69ee69f6 | 1202 | else { |
6a4694a4 | 1203 | symbols__insert(&curr_dso->symbols[curr_map->type], f); |
69ee69f6 ACM |
1204 | nr++; |
1205 | } | |
a2928c42 ACM |
1206 | } |
1207 | ||
2e538c4a ACM |
1208 | /* |
1209 | * For misannotated, zeroed, ASM function sizes. | |
1210 | */ | |
6275ce2d | 1211 | if (nr > 0) { |
6a4694a4 | 1212 | symbols__fixup_end(&self->symbols[map->type]); |
6275ce2d ACM |
1213 | if (kmap) { |
1214 | /* | |
1215 | * We need to fixup this here too because we create new | |
1216 | * maps here, for things like vsyscall sections. | |
1217 | */ | |
1218 | __map_groups__fixup_end(kmap->kmaps, map->type); | |
1219 | } | |
1220 | } | |
a2928c42 ACM |
1221 | err = nr; |
1222 | out_elf_end: | |
1223 | elf_end(elf); | |
1224 | out_close: | |
1225 | return err; | |
1226 | } | |
1227 | ||
78075caa ACM |
1228 | static bool dso__build_id_equal(const struct dso *self, u8 *build_id) |
1229 | { | |
1230 | return memcmp(self->build_id, build_id, sizeof(self->build_id)) == 0; | |
1231 | } | |
1232 | ||
a1645ce1 | 1233 | bool __dsos__read_build_ids(struct list_head *head, bool with_hits) |
57f395a7 | 1234 | { |
e30a3d12 | 1235 | bool have_build_id = false; |
57f395a7 FW |
1236 | struct dso *pos; |
1237 | ||
6122e4e4 ACM |
1238 | list_for_each_entry(pos, head, node) { |
1239 | if (with_hits && !pos->hit) | |
1240 | continue; | |
f6e1467d ACM |
1241 | if (pos->has_build_id) { |
1242 | have_build_id = true; | |
1243 | continue; | |
1244 | } | |
e30a3d12 ACM |
1245 | if (filename__read_build_id(pos->long_name, pos->build_id, |
1246 | sizeof(pos->build_id)) > 0) { | |
1247 | have_build_id = true; | |
1248 | pos->has_build_id = true; | |
1249 | } | |
6122e4e4 | 1250 | } |
57f395a7 | 1251 | |
e30a3d12 | 1252 | return have_build_id; |
57f395a7 FW |
1253 | } |
1254 | ||
fd7a346e ACM |
1255 | /* |
1256 | * Align offset to 4 bytes as needed for note name and descriptor data. | |
1257 | */ | |
1258 | #define NOTE_ALIGN(n) (((n) + 3) & -4U) | |
1259 | ||
21916c38 | 1260 | static int elf_read_build_id(Elf *elf, void *bf, size_t size) |
4d1e00a8 | 1261 | { |
21916c38 | 1262 | int err = -1; |
4d1e00a8 ACM |
1263 | GElf_Ehdr ehdr; |
1264 | GElf_Shdr shdr; | |
fd7a346e | 1265 | Elf_Data *data; |
4d1e00a8 | 1266 | Elf_Scn *sec; |
e57cfcda | 1267 | Elf_Kind ek; |
fd7a346e | 1268 | void *ptr; |
4d1e00a8 | 1269 | |
2643ce11 ACM |
1270 | if (size < BUILD_ID_SIZE) |
1271 | goto out; | |
1272 | ||
e57cfcda PE |
1273 | ek = elf_kind(elf); |
1274 | if (ek != ELF_K_ELF) | |
21916c38 | 1275 | goto out; |
e57cfcda | 1276 | |
4d1e00a8 | 1277 | if (gelf_getehdr(elf, &ehdr) == NULL) { |
6beba7ad | 1278 | pr_err("%s: cannot get elf header.\n", __func__); |
21916c38 | 1279 | goto out; |
4d1e00a8 ACM |
1280 | } |
1281 | ||
2643ce11 ACM |
1282 | sec = elf_section_by_name(elf, &ehdr, &shdr, |
1283 | ".note.gnu.build-id", NULL); | |
fd7a346e ACM |
1284 | if (sec == NULL) { |
1285 | sec = elf_section_by_name(elf, &ehdr, &shdr, | |
1286 | ".notes", NULL); | |
1287 | if (sec == NULL) | |
21916c38 | 1288 | goto out; |
fd7a346e | 1289 | } |
4d1e00a8 | 1290 | |
fd7a346e ACM |
1291 | data = elf_getdata(sec, NULL); |
1292 | if (data == NULL) | |
21916c38 | 1293 | goto out; |
fd7a346e ACM |
1294 | |
1295 | ptr = data->d_buf; | |
1296 | while (ptr < (data->d_buf + data->d_size)) { | |
1297 | GElf_Nhdr *nhdr = ptr; | |
1298 | int namesz = NOTE_ALIGN(nhdr->n_namesz), | |
1299 | descsz = NOTE_ALIGN(nhdr->n_descsz); | |
1300 | const char *name; | |
1301 | ||
1302 | ptr += sizeof(*nhdr); | |
1303 | name = ptr; | |
1304 | ptr += namesz; | |
1305 | if (nhdr->n_type == NT_GNU_BUILD_ID && | |
1306 | nhdr->n_namesz == sizeof("GNU")) { | |
1307 | if (memcmp(name, "GNU", sizeof("GNU")) == 0) { | |
1308 | memcpy(bf, ptr, BUILD_ID_SIZE); | |
1309 | err = BUILD_ID_SIZE; | |
1310 | break; | |
1311 | } | |
1312 | } | |
1313 | ptr += descsz; | |
1314 | } | |
21916c38 DM |
1315 | |
1316 | out: | |
1317 | return err; | |
1318 | } | |
1319 | ||
1320 | int filename__read_build_id(const char *filename, void *bf, size_t size) | |
1321 | { | |
1322 | int fd, err = -1; | |
1323 | Elf *elf; | |
1324 | ||
1325 | if (size < BUILD_ID_SIZE) | |
1326 | goto out; | |
1327 | ||
1328 | fd = open(filename, O_RDONLY); | |
1329 | if (fd < 0) | |
1330 | goto out; | |
1331 | ||
1332 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); | |
1333 | if (elf == NULL) { | |
1334 | pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename); | |
1335 | goto out_close; | |
1336 | } | |
1337 | ||
1338 | err = elf_read_build_id(elf, bf, size); | |
1339 | ||
2643ce11 ACM |
1340 | elf_end(elf); |
1341 | out_close: | |
1342 | close(fd); | |
1343 | out: | |
1344 | return err; | |
1345 | } | |
1346 | ||
f1617b40 ACM |
1347 | int sysfs__read_build_id(const char *filename, void *build_id, size_t size) |
1348 | { | |
1349 | int fd, err = -1; | |
1350 | ||
1351 | if (size < BUILD_ID_SIZE) | |
1352 | goto out; | |
1353 | ||
1354 | fd = open(filename, O_RDONLY); | |
1355 | if (fd < 0) | |
1356 | goto out; | |
1357 | ||
1358 | while (1) { | |
1359 | char bf[BUFSIZ]; | |
1360 | GElf_Nhdr nhdr; | |
1361 | int namesz, descsz; | |
1362 | ||
1363 | if (read(fd, &nhdr, sizeof(nhdr)) != sizeof(nhdr)) | |
1364 | break; | |
1365 | ||
fd7a346e ACM |
1366 | namesz = NOTE_ALIGN(nhdr.n_namesz); |
1367 | descsz = NOTE_ALIGN(nhdr.n_descsz); | |
f1617b40 ACM |
1368 | if (nhdr.n_type == NT_GNU_BUILD_ID && |
1369 | nhdr.n_namesz == sizeof("GNU")) { | |
1370 | if (read(fd, bf, namesz) != namesz) | |
1371 | break; | |
1372 | if (memcmp(bf, "GNU", sizeof("GNU")) == 0) { | |
1373 | if (read(fd, build_id, | |
1374 | BUILD_ID_SIZE) == BUILD_ID_SIZE) { | |
1375 | err = 0; | |
1376 | break; | |
1377 | } | |
1378 | } else if (read(fd, bf, descsz) != descsz) | |
1379 | break; | |
1380 | } else { | |
1381 | int n = namesz + descsz; | |
1382 | if (read(fd, bf, n) != n) | |
1383 | break; | |
1384 | } | |
1385 | } | |
1386 | close(fd); | |
1387 | out: | |
1388 | return err; | |
1389 | } | |
1390 | ||
94cb9e38 ACM |
1391 | char dso__symtab_origin(const struct dso *self) |
1392 | { | |
1393 | static const char origin[] = { | |
1394 | [DSO__ORIG_KERNEL] = 'k', | |
1395 | [DSO__ORIG_JAVA_JIT] = 'j', | |
4cf40131 | 1396 | [DSO__ORIG_BUILD_ID_CACHE] = 'B', |
94cb9e38 ACM |
1397 | [DSO__ORIG_FEDORA] = 'f', |
1398 | [DSO__ORIG_UBUNTU] = 'u', | |
1399 | [DSO__ORIG_BUILDID] = 'b', | |
1400 | [DSO__ORIG_DSO] = 'd', | |
439d473b | 1401 | [DSO__ORIG_KMODULE] = 'K', |
a1645ce1 ZY |
1402 | [DSO__ORIG_GUEST_KERNEL] = 'g', |
1403 | [DSO__ORIG_GUEST_KMODULE] = 'G', | |
94cb9e38 ACM |
1404 | }; |
1405 | ||
1406 | if (self == NULL || self->origin == DSO__ORIG_NOT_FOUND) | |
1407 | return '!'; | |
1408 | return origin[self->origin]; | |
1409 | } | |
1410 | ||
9de89fe7 | 1411 | int dso__load(struct dso *self, struct map *map, symbol_filter_t filter) |
a2928c42 | 1412 | { |
4d1e00a8 | 1413 | int size = PATH_MAX; |
c338aee8 | 1414 | char *name; |
a2928c42 ACM |
1415 | int ret = -1; |
1416 | int fd; | |
23346f21 | 1417 | struct machine *machine; |
a1645ce1 | 1418 | const char *root_dir; |
6da80ce8 | 1419 | int want_symtab; |
a2928c42 | 1420 | |
3610583c | 1421 | dso__set_loaded(self, map->type); |
66bd8424 | 1422 | |
a1645ce1 | 1423 | if (self->kernel == DSO_TYPE_KERNEL) |
9de89fe7 | 1424 | return dso__load_kernel_sym(self, map, filter); |
a1645ce1 ZY |
1425 | else if (self->kernel == DSO_TYPE_GUEST_KERNEL) |
1426 | return dso__load_guest_kernel_sym(self, map, filter); | |
1427 | ||
23346f21 ACM |
1428 | if (map->groups && map->groups->machine) |
1429 | machine = map->groups->machine; | |
a1645ce1 | 1430 | else |
23346f21 | 1431 | machine = NULL; |
c338aee8 ACM |
1432 | |
1433 | name = malloc(size); | |
a2928c42 ACM |
1434 | if (!name) |
1435 | return -1; | |
1436 | ||
30d7a77d | 1437 | self->adjust_symbols = 0; |
f5812a7a | 1438 | |
94cb9e38 | 1439 | if (strncmp(self->name, "/tmp/perf-", 10) == 0) { |
6beba7ad | 1440 | ret = dso__load_perf_map(self, map, filter); |
94cb9e38 ACM |
1441 | self->origin = ret > 0 ? DSO__ORIG_JAVA_JIT : |
1442 | DSO__ORIG_NOT_FOUND; | |
1443 | return ret; | |
1444 | } | |
1445 | ||
6da80ce8 DM |
1446 | /* Iterate over candidate debug images. |
1447 | * On the first pass, only load images if they have a full symtab. | |
1448 | * Failing that, do a second pass where we accept .dynsym also | |
1449 | */ | |
1450 | for (self->origin = DSO__ORIG_BUILD_ID_CACHE, want_symtab = 1; | |
1451 | self->origin != DSO__ORIG_NOT_FOUND; | |
1452 | self->origin++) { | |
94cb9e38 | 1453 | switch (self->origin) { |
6da80ce8 DM |
1454 | case DSO__ORIG_BUILD_ID_CACHE: |
1455 | if (dso__build_id_filename(self, name, size) == NULL) | |
1456 | continue; | |
1457 | break; | |
94cb9e38 | 1458 | case DSO__ORIG_FEDORA: |
439d473b ACM |
1459 | snprintf(name, size, "/usr/lib/debug%s.debug", |
1460 | self->long_name); | |
a2928c42 | 1461 | break; |
94cb9e38 | 1462 | case DSO__ORIG_UBUNTU: |
439d473b ACM |
1463 | snprintf(name, size, "/usr/lib/debug%s", |
1464 | self->long_name); | |
a2928c42 | 1465 | break; |
6da80ce8 DM |
1466 | case DSO__ORIG_BUILDID: { |
1467 | char build_id_hex[BUILD_ID_SIZE * 2 + 1]; | |
1468 | ||
1469 | if (!self->has_build_id) | |
1470 | continue; | |
1471 | ||
1472 | build_id__sprintf(self->build_id, | |
1473 | sizeof(self->build_id), | |
1474 | build_id_hex); | |
1475 | snprintf(name, size, | |
1476 | "/usr/lib/debug/.build-id/%.2s/%s.debug", | |
1477 | build_id_hex, build_id_hex + 2); | |
4d1e00a8 | 1478 | } |
6da80ce8 | 1479 | break; |
94cb9e38 | 1480 | case DSO__ORIG_DSO: |
439d473b | 1481 | snprintf(name, size, "%s", self->long_name); |
a2928c42 | 1482 | break; |
a1645ce1 | 1483 | case DSO__ORIG_GUEST_KMODULE: |
23346f21 ACM |
1484 | if (map->groups && map->groups->machine) |
1485 | root_dir = map->groups->machine->root_dir; | |
a1645ce1 ZY |
1486 | else |
1487 | root_dir = ""; | |
1488 | snprintf(name, size, "%s%s", root_dir, self->long_name); | |
1489 | break; | |
a2928c42 ACM |
1490 | |
1491 | default: | |
6da80ce8 DM |
1492 | /* |
1493 | * If we wanted a full symtab but no image had one, | |
1494 | * relax our requirements and repeat the search. | |
1495 | */ | |
1496 | if (want_symtab) { | |
1497 | want_symtab = 0; | |
1498 | self->origin = DSO__ORIG_BUILD_ID_CACHE; | |
1499 | } else | |
1500 | continue; | |
a2928c42 | 1501 | } |
6da80ce8 DM |
1502 | |
1503 | /* Name is now the name of the next image to try */ | |
a2928c42 | 1504 | fd = open(name, O_RDONLY); |
6da80ce8 DM |
1505 | if (fd < 0) |
1506 | continue; | |
a2928c42 | 1507 | |
6da80ce8 DM |
1508 | ret = dso__load_sym(self, map, name, fd, filter, 0, |
1509 | want_symtab); | |
1510 | close(fd); | |
a2928c42 | 1511 | |
6da80ce8 DM |
1512 | /* |
1513 | * Some people seem to have debuginfo files _WITHOUT_ debug | |
1514 | * info!?!? | |
1515 | */ | |
1516 | if (!ret) | |
1517 | continue; | |
a2928c42 | 1518 | |
6da80ce8 DM |
1519 | if (ret > 0) { |
1520 | int nr_plt = dso__synthesize_plt_symbols(self, map, filter); | |
1521 | if (nr_plt > 0) | |
1522 | ret += nr_plt; | |
1523 | break; | |
1524 | } | |
a25e46c4 | 1525 | } |
6da80ce8 | 1526 | |
a2928c42 | 1527 | free(name); |
1340e6bb ACM |
1528 | if (ret < 0 && strstr(self->name, " (deleted)") != NULL) |
1529 | return 0; | |
a2928c42 ACM |
1530 | return ret; |
1531 | } | |
1532 | ||
79406cd7 ACM |
1533 | struct map *map_groups__find_by_name(struct map_groups *self, |
1534 | enum map_type type, const char *name) | |
439d473b ACM |
1535 | { |
1536 | struct rb_node *nd; | |
1537 | ||
79406cd7 | 1538 | for (nd = rb_first(&self->maps[type]); nd; nd = rb_next(nd)) { |
439d473b ACM |
1539 | struct map *map = rb_entry(nd, struct map, rb_node); |
1540 | ||
b7cece76 | 1541 | if (map->dso && strcmp(map->dso->short_name, name) == 0) |
439d473b ACM |
1542 | return map; |
1543 | } | |
1544 | ||
1545 | return NULL; | |
1546 | } | |
1547 | ||
a1645ce1 ZY |
1548 | static int dso__kernel_module_get_build_id(struct dso *self, |
1549 | const char *root_dir) | |
b7cece76 ACM |
1550 | { |
1551 | char filename[PATH_MAX]; | |
1552 | /* | |
1553 | * kernel module short names are of the form "[module]" and | |
1554 | * we need just "module" here. | |
1555 | */ | |
1556 | const char *name = self->short_name + 1; | |
1557 | ||
1558 | snprintf(filename, sizeof(filename), | |
a1645ce1 ZY |
1559 | "%s/sys/module/%.*s/notes/.note.gnu.build-id", |
1560 | root_dir, (int)strlen(name) - 1, name); | |
b7cece76 ACM |
1561 | |
1562 | if (sysfs__read_build_id(filename, self->build_id, | |
1563 | sizeof(self->build_id)) == 0) | |
1564 | self->has_build_id = true; | |
1565 | ||
1566 | return 0; | |
1567 | } | |
1568 | ||
a1645ce1 ZY |
1569 | static int map_groups__set_modules_path_dir(struct map_groups *self, |
1570 | const char *dir_name) | |
6cfcc53e | 1571 | { |
439d473b | 1572 | struct dirent *dent; |
5aab621b | 1573 | DIR *dir = opendir(dir_name); |
74534341 | 1574 | int ret = 0; |
6cfcc53e | 1575 | |
439d473b | 1576 | if (!dir) { |
5aab621b | 1577 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); |
439d473b ACM |
1578 | return -1; |
1579 | } | |
6cfcc53e | 1580 | |
439d473b ACM |
1581 | while ((dent = readdir(dir)) != NULL) { |
1582 | char path[PATH_MAX]; | |
a1645ce1 ZY |
1583 | struct stat st; |
1584 | ||
1585 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
1586 | sprintf(path, "%s/%s", dir_name, dent->d_name); | |
1587 | if (stat(path, &st)) | |
1588 | continue; | |
439d473b | 1589 | |
a1645ce1 | 1590 | if (S_ISDIR(st.st_mode)) { |
439d473b ACM |
1591 | if (!strcmp(dent->d_name, ".") || |
1592 | !strcmp(dent->d_name, "..")) | |
1593 | continue; | |
1594 | ||
1595 | snprintf(path, sizeof(path), "%s/%s", | |
5aab621b | 1596 | dir_name, dent->d_name); |
74534341 GJ |
1597 | ret = map_groups__set_modules_path_dir(self, path); |
1598 | if (ret < 0) | |
1599 | goto out; | |
439d473b ACM |
1600 | } else { |
1601 | char *dot = strrchr(dent->d_name, '.'), | |
1602 | dso_name[PATH_MAX]; | |
1603 | struct map *map; | |
cfc10d3b | 1604 | char *long_name; |
439d473b ACM |
1605 | |
1606 | if (dot == NULL || strcmp(dot, ".ko")) | |
1607 | continue; | |
1608 | snprintf(dso_name, sizeof(dso_name), "[%.*s]", | |
1609 | (int)(dot - dent->d_name), dent->d_name); | |
1610 | ||
a2a99e8e | 1611 | strxfrchar(dso_name, '-', '_'); |
9de89fe7 | 1612 | map = map_groups__find_by_name(self, MAP__FUNCTION, dso_name); |
439d473b ACM |
1613 | if (map == NULL) |
1614 | continue; | |
1615 | ||
1616 | snprintf(path, sizeof(path), "%s/%s", | |
5aab621b | 1617 | dir_name, dent->d_name); |
439d473b | 1618 | |
cfc10d3b | 1619 | long_name = strdup(path); |
74534341 GJ |
1620 | if (long_name == NULL) { |
1621 | ret = -1; | |
1622 | goto out; | |
1623 | } | |
cfc10d3b | 1624 | dso__set_long_name(map->dso, long_name); |
6e406257 | 1625 | map->dso->lname_alloc = 1; |
a1645ce1 | 1626 | dso__kernel_module_get_build_id(map->dso, ""); |
439d473b | 1627 | } |
439d473b | 1628 | } |
6cfcc53e | 1629 | |
74534341 | 1630 | out: |
439d473b | 1631 | closedir(dir); |
74534341 | 1632 | return ret; |
439d473b | 1633 | } |
6cfcc53e | 1634 | |
a1645ce1 | 1635 | static char *get_kernel_version(const char *root_dir) |
439d473b | 1636 | { |
a1645ce1 ZY |
1637 | char version[PATH_MAX]; |
1638 | FILE *file; | |
1639 | char *name, *tmp; | |
1640 | const char *prefix = "Linux version "; | |
1641 | ||
1642 | sprintf(version, "%s/proc/version", root_dir); | |
1643 | file = fopen(version, "r"); | |
1644 | if (!file) | |
1645 | return NULL; | |
1646 | ||
1647 | version[0] = '\0'; | |
1648 | tmp = fgets(version, sizeof(version), file); | |
1649 | fclose(file); | |
1650 | ||
1651 | name = strstr(version, prefix); | |
1652 | if (!name) | |
1653 | return NULL; | |
1654 | name += strlen(prefix); | |
1655 | tmp = strchr(name, ' '); | |
1656 | if (tmp) | |
1657 | *tmp = '\0'; | |
1658 | ||
1659 | return strdup(name); | |
1660 | } | |
1661 | ||
d28c6223 | 1662 | static int machine__set_modules_path(struct machine *self) |
a1645ce1 ZY |
1663 | { |
1664 | char *version; | |
439d473b | 1665 | char modules_path[PATH_MAX]; |
6cfcc53e | 1666 | |
d28c6223 | 1667 | version = get_kernel_version(self->root_dir); |
a1645ce1 | 1668 | if (!version) |
439d473b | 1669 | return -1; |
6cfcc53e | 1670 | |
a1645ce1 | 1671 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s/kernel", |
d28c6223 | 1672 | self->root_dir, version); |
a1645ce1 | 1673 | free(version); |
6cfcc53e | 1674 | |
d28c6223 | 1675 | return map_groups__set_modules_path_dir(&self->kmaps, modules_path); |
6cfcc53e MG |
1676 | } |
1677 | ||
439d473b ACM |
1678 | /* |
1679 | * Constructor variant for modules (where we know from /proc/modules where | |
1680 | * they are loaded) and for vmlinux, where only after we load all the | |
1681 | * symbols we'll know where it starts and ends. | |
1682 | */ | |
3610583c | 1683 | static struct map *map__new2(u64 start, struct dso *dso, enum map_type type) |
6cfcc53e | 1684 | { |
5aab621b ACM |
1685 | struct map *self = calloc(1, (sizeof(*self) + |
1686 | (dso->kernel ? sizeof(struct kmap) : 0))); | |
439d473b | 1687 | if (self != NULL) { |
439d473b | 1688 | /* |
afb7b4f0 | 1689 | * ->end will be filled after we load all the symbols |
439d473b | 1690 | */ |
3610583c | 1691 | map__init(self, type, start, 0, 0, dso); |
439d473b | 1692 | } |
afb7b4f0 | 1693 | |
439d473b ACM |
1694 | return self; |
1695 | } | |
1696 | ||
d28c6223 ACM |
1697 | struct map *machine__new_module(struct machine *self, u64 start, |
1698 | const char *filename) | |
b7cece76 ACM |
1699 | { |
1700 | struct map *map; | |
d28c6223 | 1701 | struct dso *dso = __dsos__findnew(&self->kernel_dsos, filename); |
b7cece76 ACM |
1702 | |
1703 | if (dso == NULL) | |
1704 | return NULL; | |
1705 | ||
1706 | map = map__new2(start, dso, MAP__FUNCTION); | |
1707 | if (map == NULL) | |
1708 | return NULL; | |
1709 | ||
d28c6223 | 1710 | if (machine__is_host(self)) |
a1645ce1 ZY |
1711 | dso->origin = DSO__ORIG_KMODULE; |
1712 | else | |
1713 | dso->origin = DSO__ORIG_GUEST_KMODULE; | |
d28c6223 | 1714 | map_groups__insert(&self->kmaps, map); |
b7cece76 ACM |
1715 | return map; |
1716 | } | |
1717 | ||
d28c6223 | 1718 | static int machine__create_modules(struct machine *self) |
439d473b ACM |
1719 | { |
1720 | char *line = NULL; | |
1721 | size_t n; | |
a1645ce1 | 1722 | FILE *file; |
439d473b | 1723 | struct map *map; |
a1645ce1 ZY |
1724 | const char *modules; |
1725 | char path[PATH_MAX]; | |
1726 | ||
d28c6223 | 1727 | if (machine__is_default_guest(self)) |
a1645ce1 ZY |
1728 | modules = symbol_conf.default_guest_modules; |
1729 | else { | |
d28c6223 | 1730 | sprintf(path, "%s/proc/modules", self->root_dir); |
a1645ce1 ZY |
1731 | modules = path; |
1732 | } | |
6cfcc53e | 1733 | |
a1645ce1 | 1734 | file = fopen(modules, "r"); |
439d473b ACM |
1735 | if (file == NULL) |
1736 | return -1; | |
6cfcc53e | 1737 | |
439d473b ACM |
1738 | while (!feof(file)) { |
1739 | char name[PATH_MAX]; | |
1740 | u64 start; | |
439d473b ACM |
1741 | char *sep; |
1742 | int line_len; | |
6cfcc53e | 1743 | |
439d473b ACM |
1744 | line_len = getline(&line, &n, file); |
1745 | if (line_len < 0) | |
1746 | break; | |
1747 | ||
1748 | if (!line) | |
1749 | goto out_failure; | |
1750 | ||
1751 | line[--line_len] = '\0'; /* \n */ | |
1752 | ||
1753 | sep = strrchr(line, 'x'); | |
1754 | if (sep == NULL) | |
1755 | continue; | |
1756 | ||
1757 | hex2u64(sep + 1, &start); | |
1758 | ||
1759 | sep = strchr(line, ' '); | |
1760 | if (sep == NULL) | |
1761 | continue; | |
1762 | ||
1763 | *sep = '\0'; | |
1764 | ||
1765 | snprintf(name, sizeof(name), "[%s]", line); | |
d28c6223 | 1766 | map = machine__new_module(self, start, name); |
b7cece76 | 1767 | if (map == NULL) |
439d473b | 1768 | goto out_delete_line; |
d28c6223 | 1769 | dso__kernel_module_get_build_id(map->dso, self->root_dir); |
6cfcc53e | 1770 | } |
439d473b ACM |
1771 | |
1772 | free(line); | |
1773 | fclose(file); | |
1774 | ||
d28c6223 | 1775 | return machine__set_modules_path(self); |
439d473b ACM |
1776 | |
1777 | out_delete_line: | |
1778 | free(line); | |
1779 | out_failure: | |
1780 | return -1; | |
6cfcc53e MG |
1781 | } |
1782 | ||
9958e1f0 | 1783 | static int dso__load_vmlinux(struct dso *self, struct map *map, |
6beba7ad | 1784 | const char *vmlinux, symbol_filter_t filter) |
a2928c42 | 1785 | { |
fbd733b8 | 1786 | int err = -1, fd; |
a2928c42 | 1787 | |
fbd733b8 | 1788 | fd = open(vmlinux, O_RDONLY); |
a2928c42 ACM |
1789 | if (fd < 0) |
1790 | return -1; | |
1791 | ||
3610583c | 1792 | dso__set_loaded(self, map->type); |
6da80ce8 | 1793 | err = dso__load_sym(self, map, vmlinux, fd, filter, 0, 0); |
a2928c42 ACM |
1794 | close(fd); |
1795 | ||
3846df2e ACM |
1796 | if (err > 0) |
1797 | pr_debug("Using %s for symbols\n", vmlinux); | |
1798 | ||
a2928c42 ACM |
1799 | return err; |
1800 | } | |
1801 | ||
a19afe46 | 1802 | int dso__load_vmlinux_path(struct dso *self, struct map *map, |
9de89fe7 | 1803 | symbol_filter_t filter) |
a19afe46 ACM |
1804 | { |
1805 | int i, err = 0; | |
5ad90e4e | 1806 | char *filename; |
a19afe46 ACM |
1807 | |
1808 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", | |
5ad90e4e ACM |
1809 | vmlinux_path__nr_entries + 1); |
1810 | ||
1811 | filename = dso__build_id_filename(self, NULL, 0); | |
1812 | if (filename != NULL) { | |
1813 | err = dso__load_vmlinux(self, map, filename, filter); | |
1814 | if (err > 0) { | |
1815 | dso__set_long_name(self, filename); | |
1816 | goto out; | |
1817 | } | |
1818 | free(filename); | |
1819 | } | |
a19afe46 ACM |
1820 | |
1821 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { | |
9de89fe7 | 1822 | err = dso__load_vmlinux(self, map, vmlinux_path[i], filter); |
a19afe46 | 1823 | if (err > 0) { |
a19afe46 ACM |
1824 | dso__set_long_name(self, strdup(vmlinux_path[i])); |
1825 | break; | |
1826 | } | |
1827 | } | |
5ad90e4e | 1828 | out: |
a19afe46 ACM |
1829 | return err; |
1830 | } | |
1831 | ||
c338aee8 | 1832 | static int dso__load_kernel_sym(struct dso *self, struct map *map, |
9de89fe7 | 1833 | symbol_filter_t filter) |
a827c875 | 1834 | { |
cc612d81 | 1835 | int err; |
9e201442 ACM |
1836 | const char *kallsyms_filename = NULL; |
1837 | char *kallsyms_allocated_filename = NULL; | |
dc8d6ab2 ACM |
1838 | /* |
1839 | * Step 1: if the user specified a vmlinux filename, use it and only | |
1840 | * it, reporting errors to the user if it cannot be used. | |
1841 | * | |
1842 | * For instance, try to analyse an ARM perf.data file _without_ a | |
1843 | * build-id, or if the user specifies the wrong path to the right | |
1844 | * vmlinux file, obviously we can't fallback to another vmlinux (a | |
1845 | * x86_86 one, on the machine where analysis is being performed, say), | |
1846 | * or worse, /proc/kallsyms. | |
1847 | * | |
1848 | * If the specified file _has_ a build-id and there is a build-id | |
1849 | * section in the perf.data file, we will still do the expected | |
1850 | * validation in dso__load_vmlinux and will bail out if they don't | |
1851 | * match. | |
1852 | */ | |
1853 | if (symbol_conf.vmlinux_name != NULL) { | |
9de89fe7 | 1854 | err = dso__load_vmlinux(self, map, |
dc8d6ab2 | 1855 | symbol_conf.vmlinux_name, filter); |
e7dadc00 ACM |
1856 | if (err > 0) { |
1857 | dso__set_long_name(self, | |
1858 | strdup(symbol_conf.vmlinux_name)); | |
1859 | goto out_fixup; | |
1860 | } | |
1861 | return err; | |
dc8d6ab2 | 1862 | } |
cc612d81 ACM |
1863 | |
1864 | if (vmlinux_path != NULL) { | |
9de89fe7 | 1865 | err = dso__load_vmlinux_path(self, map, filter); |
a19afe46 ACM |
1866 | if (err > 0) |
1867 | goto out_fixup; | |
cc612d81 ACM |
1868 | } |
1869 | ||
b7cece76 ACM |
1870 | /* |
1871 | * Say the kernel DSO was created when processing the build-id header table, | |
1872 | * we have a build-id, so check if it is the same as the running kernel, | |
1873 | * using it if it is. | |
1874 | */ | |
1875 | if (self->has_build_id) { | |
1876 | u8 kallsyms_build_id[BUILD_ID_SIZE]; | |
9e201442 | 1877 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; |
b7cece76 ACM |
1878 | |
1879 | if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id, | |
8d0591f6 | 1880 | sizeof(kallsyms_build_id)) == 0) { |
9e201442 ACM |
1881 | if (dso__build_id_equal(self, kallsyms_build_id)) { |
1882 | kallsyms_filename = "/proc/kallsyms"; | |
8d0591f6 | 1883 | goto do_kallsyms; |
9e201442 | 1884 | } |
8d0591f6 | 1885 | } |
dc8d6ab2 ACM |
1886 | /* |
1887 | * Now look if we have it on the build-id cache in | |
1888 | * $HOME/.debug/[kernel.kallsyms]. | |
1889 | */ | |
9e201442 ACM |
1890 | build_id__sprintf(self->build_id, sizeof(self->build_id), |
1891 | sbuild_id); | |
1892 | ||
1893 | if (asprintf(&kallsyms_allocated_filename, | |
1894 | "%s/.debug/[kernel.kallsyms]/%s", | |
3846df2e ACM |
1895 | getenv("HOME"), sbuild_id) == -1) { |
1896 | pr_err("Not enough memory for kallsyms file lookup\n"); | |
dc8d6ab2 | 1897 | return -1; |
3846df2e | 1898 | } |
dc8d6ab2 | 1899 | |
19fc2ded ACM |
1900 | kallsyms_filename = kallsyms_allocated_filename; |
1901 | ||
dc8d6ab2 | 1902 | if (access(kallsyms_filename, F_OK)) { |
3846df2e ACM |
1903 | pr_err("No kallsyms or vmlinux with build-id %s " |
1904 | "was found\n", sbuild_id); | |
9e201442 | 1905 | free(kallsyms_allocated_filename); |
dc8d6ab2 | 1906 | return -1; |
9e201442 | 1907 | } |
dc8d6ab2 ACM |
1908 | } else { |
1909 | /* | |
1910 | * Last resort, if we don't have a build-id and couldn't find | |
1911 | * any vmlinux file, try the running kernel kallsyms table. | |
1912 | */ | |
9e201442 | 1913 | kallsyms_filename = "/proc/kallsyms"; |
9e201442 | 1914 | } |
439d473b | 1915 | |
cc612d81 | 1916 | do_kallsyms: |
9de89fe7 | 1917 | err = dso__load_kallsyms(self, kallsyms_filename, map, filter); |
3846df2e ACM |
1918 | if (err > 0) |
1919 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
dc8d6ab2 | 1920 | free(kallsyms_allocated_filename); |
439d473b ACM |
1921 | |
1922 | if (err > 0) { | |
cc612d81 | 1923 | out_fixup: |
e1c7c6a4 | 1924 | if (kallsyms_filename != NULL) |
dc8d6ab2 | 1925 | dso__set_long_name(self, strdup("[kernel.kallsyms]")); |
6a4694a4 ACM |
1926 | map__fixup_start(map); |
1927 | map__fixup_end(map); | |
439d473b | 1928 | } |
94cb9e38 | 1929 | |
a827c875 ACM |
1930 | return err; |
1931 | } | |
1932 | ||
a1645ce1 ZY |
1933 | static int dso__load_guest_kernel_sym(struct dso *self, struct map *map, |
1934 | symbol_filter_t filter) | |
1935 | { | |
1936 | int err; | |
1937 | const char *kallsyms_filename = NULL; | |
23346f21 | 1938 | struct machine *machine; |
a1645ce1 ZY |
1939 | char path[PATH_MAX]; |
1940 | ||
1941 | if (!map->groups) { | |
1942 | pr_debug("Guest kernel map hasn't the point to groups\n"); | |
1943 | return -1; | |
1944 | } | |
23346f21 | 1945 | machine = map->groups->machine; |
a1645ce1 | 1946 | |
23346f21 | 1947 | if (machine__is_default_guest(machine)) { |
a1645ce1 ZY |
1948 | /* |
1949 | * if the user specified a vmlinux filename, use it and only | |
1950 | * it, reporting errors to the user if it cannot be used. | |
1951 | * Or use file guest_kallsyms inputted by user on commandline | |
1952 | */ | |
1953 | if (symbol_conf.default_guest_vmlinux_name != NULL) { | |
1954 | err = dso__load_vmlinux(self, map, | |
1955 | symbol_conf.default_guest_vmlinux_name, filter); | |
1956 | goto out_try_fixup; | |
1957 | } | |
1958 | ||
1959 | kallsyms_filename = symbol_conf.default_guest_kallsyms; | |
1960 | if (!kallsyms_filename) | |
1961 | return -1; | |
1962 | } else { | |
23346f21 | 1963 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); |
a1645ce1 ZY |
1964 | kallsyms_filename = path; |
1965 | } | |
1966 | ||
1967 | err = dso__load_kallsyms(self, kallsyms_filename, map, filter); | |
1968 | if (err > 0) | |
1969 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
1970 | ||
1971 | out_try_fixup: | |
1972 | if (err > 0) { | |
1973 | if (kallsyms_filename != NULL) { | |
48ea8f54 | 1974 | machine__mmap_name(machine, path, sizeof(path)); |
23346f21 | 1975 | dso__set_long_name(self, strdup(path)); |
a1645ce1 ZY |
1976 | } |
1977 | map__fixup_start(map); | |
1978 | map__fixup_end(map); | |
1979 | } | |
1980 | ||
1981 | return err; | |
1982 | } | |
cd84c2ac | 1983 | |
b0da954a | 1984 | static void dsos__add(struct list_head *head, struct dso *dso) |
cd84c2ac | 1985 | { |
b0da954a | 1986 | list_add_tail(&dso->node, head); |
cd84c2ac FW |
1987 | } |
1988 | ||
b0da954a | 1989 | static struct dso *dsos__find(struct list_head *head, const char *name) |
cd84c2ac FW |
1990 | { |
1991 | struct dso *pos; | |
1992 | ||
b0da954a | 1993 | list_for_each_entry(pos, head, node) |
cf4e5b08 | 1994 | if (strcmp(pos->long_name, name) == 0) |
cd84c2ac FW |
1995 | return pos; |
1996 | return NULL; | |
1997 | } | |
1998 | ||
a89e5abe | 1999 | struct dso *__dsos__findnew(struct list_head *head, const char *name) |
cd84c2ac | 2000 | { |
a89e5abe | 2001 | struct dso *dso = dsos__find(head, name); |
cd84c2ac | 2002 | |
e4204992 | 2003 | if (!dso) { |
00a192b3 | 2004 | dso = dso__new(name); |
cfc10d3b | 2005 | if (dso != NULL) { |
a89e5abe | 2006 | dsos__add(head, dso); |
cfc10d3b ACM |
2007 | dso__set_basename(dso); |
2008 | } | |
66bd8424 | 2009 | } |
cd84c2ac FW |
2010 | |
2011 | return dso; | |
cd84c2ac FW |
2012 | } |
2013 | ||
1f626bc3 | 2014 | size_t __dsos__fprintf(struct list_head *head, FILE *fp) |
cd84c2ac FW |
2015 | { |
2016 | struct dso *pos; | |
cbf69680 | 2017 | size_t ret = 0; |
cd84c2ac | 2018 | |
95011c60 ACM |
2019 | list_for_each_entry(pos, head, node) { |
2020 | int i; | |
2021 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
cbf69680 | 2022 | ret += dso__fprintf(pos, i, fp); |
95011c60 | 2023 | } |
cbf69680 ACM |
2024 | |
2025 | return ret; | |
cd84c2ac FW |
2026 | } |
2027 | ||
cbf69680 | 2028 | size_t machines__fprintf_dsos(struct rb_root *self, FILE *fp) |
b0da954a | 2029 | { |
a1645ce1 | 2030 | struct rb_node *nd; |
cbf69680 | 2031 | size_t ret = 0; |
a1645ce1 | 2032 | |
cbf69680 | 2033 | for (nd = rb_first(self); nd; nd = rb_next(nd)) { |
23346f21 | 2034 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
cbf69680 ACM |
2035 | ret += __dsos__fprintf(&pos->kernel_dsos, fp); |
2036 | ret += __dsos__fprintf(&pos->user_dsos, fp); | |
a1645ce1 | 2037 | } |
cbf69680 ACM |
2038 | |
2039 | return ret; | |
b0da954a ACM |
2040 | } |
2041 | ||
88d3d9b7 ACM |
2042 | static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp, |
2043 | bool with_hits) | |
9e03eb2d ACM |
2044 | { |
2045 | struct dso *pos; | |
2046 | size_t ret = 0; | |
2047 | ||
b0da954a | 2048 | list_for_each_entry(pos, head, node) { |
88d3d9b7 ACM |
2049 | if (with_hits && !pos->hit) |
2050 | continue; | |
9e03eb2d | 2051 | ret += dso__fprintf_buildid(pos, fp); |
1124ba73 | 2052 | ret += fprintf(fp, " %s\n", pos->long_name); |
9e03eb2d ACM |
2053 | } |
2054 | return ret; | |
2055 | } | |
2056 | ||
f869097e ACM |
2057 | size_t machine__fprintf_dsos_buildid(struct machine *self, FILE *fp, bool with_hits) |
2058 | { | |
2059 | return __dsos__fprintf_buildid(&self->kernel_dsos, fp, with_hits) + | |
2060 | __dsos__fprintf_buildid(&self->user_dsos, fp, with_hits); | |
2061 | } | |
2062 | ||
cbf69680 | 2063 | size_t machines__fprintf_dsos_buildid(struct rb_root *self, FILE *fp, bool with_hits) |
b0da954a | 2064 | { |
a1645ce1 ZY |
2065 | struct rb_node *nd; |
2066 | size_t ret = 0; | |
2067 | ||
cbf69680 | 2068 | for (nd = rb_first(self); nd; nd = rb_next(nd)) { |
23346f21 | 2069 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
f869097e | 2070 | ret += machine__fprintf_dsos_buildid(pos, fp, with_hits); |
a1645ce1 ZY |
2071 | } |
2072 | return ret; | |
b0da954a ACM |
2073 | } |
2074 | ||
fd1d908c ACM |
2075 | struct dso *dso__new_kernel(const char *name) |
2076 | { | |
2077 | struct dso *self = dso__new(name ?: "[kernel.kallsyms]"); | |
2078 | ||
2079 | if (self != NULL) { | |
b63be8d7 | 2080 | dso__set_short_name(self, "[kernel]"); |
a1645ce1 ZY |
2081 | self->kernel = DSO_TYPE_KERNEL; |
2082 | } | |
2083 | ||
2084 | return self; | |
2085 | } | |
2086 | ||
23346f21 | 2087 | static struct dso *dso__new_guest_kernel(struct machine *machine, |
a1645ce1 ZY |
2088 | const char *name) |
2089 | { | |
48ea8f54 ACM |
2090 | char bf[PATH_MAX]; |
2091 | struct dso *self = dso__new(name ?: machine__mmap_name(machine, bf, sizeof(bf))); | |
a1645ce1 | 2092 | |
a1645ce1 ZY |
2093 | if (self != NULL) { |
2094 | dso__set_short_name(self, "[guest.kernel]"); | |
2095 | self->kernel = DSO_TYPE_GUEST_KERNEL; | |
fd1d908c ACM |
2096 | } |
2097 | ||
2098 | return self; | |
2099 | } | |
2100 | ||
23346f21 | 2101 | void dso__read_running_kernel_build_id(struct dso *self, struct machine *machine) |
fd1d908c | 2102 | { |
a1645ce1 ZY |
2103 | char path[PATH_MAX]; |
2104 | ||
23346f21 | 2105 | if (machine__is_default_guest(machine)) |
a1645ce1 | 2106 | return; |
23346f21 | 2107 | sprintf(path, "%s/sys/kernel/notes", machine->root_dir); |
a1645ce1 | 2108 | if (sysfs__read_build_id(path, self->build_id, |
fd1d908c ACM |
2109 | sizeof(self->build_id)) == 0) |
2110 | self->has_build_id = true; | |
2111 | } | |
2112 | ||
5c0541d5 | 2113 | static struct dso *machine__create_kernel(struct machine *self) |
cd84c2ac | 2114 | { |
a1645ce1 ZY |
2115 | const char *vmlinux_name = NULL; |
2116 | struct dso *kernel; | |
cd84c2ac | 2117 | |
5c0541d5 | 2118 | if (machine__is_host(self)) { |
a1645ce1 ZY |
2119 | vmlinux_name = symbol_conf.vmlinux_name; |
2120 | kernel = dso__new_kernel(vmlinux_name); | |
2121 | } else { | |
5c0541d5 | 2122 | if (machine__is_default_guest(self)) |
a1645ce1 | 2123 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; |
5c0541d5 | 2124 | kernel = dso__new_guest_kernel(self, vmlinux_name); |
8d92c02a | 2125 | } |
cd84c2ac | 2126 | |
a1645ce1 | 2127 | if (kernel != NULL) { |
5c0541d5 ACM |
2128 | dso__read_running_kernel_build_id(kernel, self); |
2129 | dsos__add(&self->kernel_dsos, kernel); | |
a1645ce1 | 2130 | } |
f1dfa0b1 | 2131 | return kernel; |
f1dfa0b1 ACM |
2132 | } |
2133 | ||
d28c6223 | 2134 | int __machine__create_kernel_maps(struct machine *self, struct dso *kernel) |
f1dfa0b1 | 2135 | { |
de176489 | 2136 | enum map_type type; |
f1dfa0b1 | 2137 | |
de176489 | 2138 | for (type = 0; type < MAP__NR_TYPES; ++type) { |
9de89fe7 ACM |
2139 | struct kmap *kmap; |
2140 | ||
d28c6223 ACM |
2141 | self->vmlinux_maps[type] = map__new2(0, kernel, type); |
2142 | if (self->vmlinux_maps[type] == NULL) | |
de176489 | 2143 | return -1; |
f1dfa0b1 | 2144 | |
d28c6223 ACM |
2145 | self->vmlinux_maps[type]->map_ip = |
2146 | self->vmlinux_maps[type]->unmap_ip = identity__map_ip; | |
9de89fe7 | 2147 | |
d28c6223 ACM |
2148 | kmap = map__kmap(self->vmlinux_maps[type]); |
2149 | kmap->kmaps = &self->kmaps; | |
2150 | map_groups__insert(&self->kmaps, self->vmlinux_maps[type]); | |
f1dfa0b1 ACM |
2151 | } |
2152 | ||
f1dfa0b1 | 2153 | return 0; |
2446042c ACM |
2154 | } |
2155 | ||
076c6e45 ACM |
2156 | void machine__destroy_kernel_maps(struct machine *self) |
2157 | { | |
2158 | enum map_type type; | |
2159 | ||
2160 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
2161 | struct kmap *kmap; | |
2162 | ||
2163 | if (self->vmlinux_maps[type] == NULL) | |
2164 | continue; | |
2165 | ||
2166 | kmap = map__kmap(self->vmlinux_maps[type]); | |
2167 | map_groups__remove(&self->kmaps, self->vmlinux_maps[type]); | |
2168 | if (kmap->ref_reloc_sym) { | |
2169 | /* | |
2170 | * ref_reloc_sym is shared among all maps, so free just | |
2171 | * on one of them. | |
2172 | */ | |
2173 | if (type == MAP__FUNCTION) { | |
2174 | free((char *)kmap->ref_reloc_sym->name); | |
2175 | kmap->ref_reloc_sym->name = NULL; | |
2176 | free(kmap->ref_reloc_sym); | |
2177 | } | |
2178 | kmap->ref_reloc_sym = NULL; | |
2179 | } | |
2180 | ||
2181 | map__delete(self->vmlinux_maps[type]); | |
2182 | self->vmlinux_maps[type] = NULL; | |
2183 | } | |
2184 | } | |
2185 | ||
5c0541d5 ACM |
2186 | int machine__create_kernel_maps(struct machine *self) |
2187 | { | |
2188 | struct dso *kernel = machine__create_kernel(self); | |
2189 | ||
2190 | if (kernel == NULL || | |
2191 | __machine__create_kernel_maps(self, kernel) < 0) | |
2192 | return -1; | |
2193 | ||
2194 | if (symbol_conf.use_modules && machine__create_modules(self) < 0) | |
2195 | pr_debug("Problems creating module maps, continuing anyway...\n"); | |
2196 | /* | |
2197 | * Now that we have all the maps created, just set the ->end of them: | |
2198 | */ | |
2199 | map_groups__fixup_end(&self->kmaps); | |
2200 | return 0; | |
2201 | } | |
2202 | ||
cc612d81 ACM |
2203 | static void vmlinux_path__exit(void) |
2204 | { | |
2205 | while (--vmlinux_path__nr_entries >= 0) { | |
2206 | free(vmlinux_path[vmlinux_path__nr_entries]); | |
2207 | vmlinux_path[vmlinux_path__nr_entries] = NULL; | |
2208 | } | |
2209 | ||
2210 | free(vmlinux_path); | |
2211 | vmlinux_path = NULL; | |
2212 | } | |
2213 | ||
2214 | static int vmlinux_path__init(void) | |
2215 | { | |
2216 | struct utsname uts; | |
2217 | char bf[PATH_MAX]; | |
2218 | ||
2219 | if (uname(&uts) < 0) | |
2220 | return -1; | |
2221 | ||
2222 | vmlinux_path = malloc(sizeof(char *) * 5); | |
2223 | if (vmlinux_path == NULL) | |
2224 | return -1; | |
2225 | ||
2226 | vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux"); | |
2227 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2228 | goto out_fail; | |
2229 | ++vmlinux_path__nr_entries; | |
2230 | vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux"); | |
2231 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2232 | goto out_fail; | |
2233 | ++vmlinux_path__nr_entries; | |
2234 | snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", uts.release); | |
2235 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2236 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2237 | goto out_fail; | |
2238 | ++vmlinux_path__nr_entries; | |
2239 | snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", uts.release); | |
2240 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2241 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2242 | goto out_fail; | |
2243 | ++vmlinux_path__nr_entries; | |
2244 | snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux", | |
2245 | uts.release); | |
2246 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2247 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2248 | goto out_fail; | |
2249 | ++vmlinux_path__nr_entries; | |
2250 | ||
2251 | return 0; | |
2252 | ||
2253 | out_fail: | |
2254 | vmlinux_path__exit(); | |
2255 | return -1; | |
2256 | } | |
2257 | ||
5ad90e4e | 2258 | size_t machine__fprintf_vmlinux_path(struct machine *self, FILE *fp) |
b0a9ab62 ACM |
2259 | { |
2260 | int i; | |
2261 | size_t printed = 0; | |
5ad90e4e ACM |
2262 | struct dso *kdso = self->vmlinux_maps[MAP__FUNCTION]->dso; |
2263 | ||
2264 | if (kdso->has_build_id) { | |
2265 | char filename[PATH_MAX]; | |
2266 | if (dso__build_id_filename(kdso, filename, sizeof(filename))) | |
2267 | printed += fprintf(fp, "[0] %s\n", filename); | |
2268 | } | |
b0a9ab62 ACM |
2269 | |
2270 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
5ad90e4e ACM |
2271 | printed += fprintf(fp, "[%d] %s\n", |
2272 | i + kdso->has_build_id, vmlinux_path[i]); | |
b0a9ab62 ACM |
2273 | |
2274 | return printed; | |
2275 | } | |
2276 | ||
655000e7 ACM |
2277 | static int setup_list(struct strlist **list, const char *list_str, |
2278 | const char *list_name) | |
2279 | { | |
2280 | if (list_str == NULL) | |
2281 | return 0; | |
2282 | ||
2283 | *list = strlist__new(true, list_str); | |
2284 | if (!*list) { | |
2285 | pr_err("problems parsing %s list\n", list_name); | |
2286 | return -1; | |
2287 | } | |
2288 | return 0; | |
2289 | } | |
2290 | ||
75be6cf4 | 2291 | int symbol__init(void) |
2446042c | 2292 | { |
85e00b55 JZ |
2293 | if (symbol_conf.initialized) |
2294 | return 0; | |
2295 | ||
95011c60 | 2296 | elf_version(EV_CURRENT); |
75be6cf4 ACM |
2297 | if (symbol_conf.sort_by_name) |
2298 | symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - | |
2299 | sizeof(struct symbol)); | |
b32d133a | 2300 | |
75be6cf4 | 2301 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init() < 0) |
2446042c ACM |
2302 | return -1; |
2303 | ||
c410a338 ACM |
2304 | if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { |
2305 | pr_err("'.' is the only non valid --field-separator argument\n"); | |
2306 | return -1; | |
2307 | } | |
2308 | ||
655000e7 ACM |
2309 | if (setup_list(&symbol_conf.dso_list, |
2310 | symbol_conf.dso_list_str, "dso") < 0) | |
2311 | return -1; | |
2312 | ||
2313 | if (setup_list(&symbol_conf.comm_list, | |
2314 | symbol_conf.comm_list_str, "comm") < 0) | |
2315 | goto out_free_dso_list; | |
2316 | ||
2317 | if (setup_list(&symbol_conf.sym_list, | |
2318 | symbol_conf.sym_list_str, "symbol") < 0) | |
2319 | goto out_free_comm_list; | |
2320 | ||
85e00b55 | 2321 | symbol_conf.initialized = true; |
4aa65636 | 2322 | return 0; |
655000e7 ACM |
2323 | |
2324 | out_free_dso_list: | |
2325 | strlist__delete(symbol_conf.dso_list); | |
2326 | out_free_comm_list: | |
2327 | strlist__delete(symbol_conf.comm_list); | |
2328 | return -1; | |
4aa65636 ACM |
2329 | } |
2330 | ||
d65a458b ACM |
2331 | void symbol__exit(void) |
2332 | { | |
85e00b55 JZ |
2333 | if (!symbol_conf.initialized) |
2334 | return; | |
d65a458b ACM |
2335 | strlist__delete(symbol_conf.sym_list); |
2336 | strlist__delete(symbol_conf.dso_list); | |
2337 | strlist__delete(symbol_conf.comm_list); | |
2338 | vmlinux_path__exit(); | |
2339 | symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL; | |
85e00b55 | 2340 | symbol_conf.initialized = false; |
d65a458b ACM |
2341 | } |
2342 | ||
d28c6223 | 2343 | int machines__create_kernel_maps(struct rb_root *self, pid_t pid) |
4aa65636 | 2344 | { |
d28c6223 | 2345 | struct machine *machine = machines__findnew(self, pid); |
9de89fe7 | 2346 | |
23346f21 | 2347 | if (machine == NULL) |
a1645ce1 | 2348 | return -1; |
cc612d81 | 2349 | |
5c0541d5 | 2350 | return machine__create_kernel_maps(machine); |
cd84c2ac | 2351 | } |
5aab621b ACM |
2352 | |
2353 | static int hex(char ch) | |
2354 | { | |
2355 | if ((ch >= '0') && (ch <= '9')) | |
2356 | return ch - '0'; | |
2357 | if ((ch >= 'a') && (ch <= 'f')) | |
2358 | return ch - 'a' + 10; | |
2359 | if ((ch >= 'A') && (ch <= 'F')) | |
2360 | return ch - 'A' + 10; | |
2361 | return -1; | |
2362 | } | |
2363 | ||
2364 | /* | |
2365 | * While we find nice hex chars, build a long_val. | |
2366 | * Return number of chars processed. | |
2367 | */ | |
2368 | int hex2u64(const char *ptr, u64 *long_val) | |
2369 | { | |
2370 | const char *p = ptr; | |
2371 | *long_val = 0; | |
2372 | ||
2373 | while (*p) { | |
2374 | const int hex_val = hex(*p); | |
2375 | ||
2376 | if (hex_val < 0) | |
2377 | break; | |
2378 | ||
2379 | *long_val = (*long_val << 4) | hex_val; | |
2380 | p++; | |
2381 | } | |
2382 | ||
2383 | return p - ptr; | |
2384 | } | |
2385 | ||
2386 | char *strxfrchar(char *s, char from, char to) | |
2387 | { | |
2388 | char *p = s; | |
2389 | ||
2390 | while ((p = strchr(p, from)) != NULL) | |
2391 | *p++ = to; | |
2392 | ||
2393 | return s; | |
2394 | } | |
a1645ce1 | 2395 | |
d28c6223 | 2396 | int machines__create_guest_kernel_maps(struct rb_root *self) |
a1645ce1 ZY |
2397 | { |
2398 | int ret = 0; | |
2399 | struct dirent **namelist = NULL; | |
2400 | int i, items = 0; | |
2401 | char path[PATH_MAX]; | |
2402 | pid_t pid; | |
2403 | ||
2404 | if (symbol_conf.default_guest_vmlinux_name || | |
2405 | symbol_conf.default_guest_modules || | |
2406 | symbol_conf.default_guest_kallsyms) { | |
d28c6223 | 2407 | machines__create_kernel_maps(self, DEFAULT_GUEST_KERNEL_ID); |
a1645ce1 ZY |
2408 | } |
2409 | ||
2410 | if (symbol_conf.guestmount) { | |
2411 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
2412 | if (items <= 0) | |
2413 | return -ENOENT; | |
2414 | for (i = 0; i < items; i++) { | |
2415 | if (!isdigit(namelist[i]->d_name[0])) { | |
2416 | /* Filter out . and .. */ | |
2417 | continue; | |
2418 | } | |
2419 | pid = atoi(namelist[i]->d_name); | |
2420 | sprintf(path, "%s/%s/proc/kallsyms", | |
2421 | symbol_conf.guestmount, | |
2422 | namelist[i]->d_name); | |
2423 | ret = access(path, R_OK); | |
2424 | if (ret) { | |
2425 | pr_debug("Can't access file %s\n", path); | |
2426 | goto failure; | |
2427 | } | |
d28c6223 | 2428 | machines__create_kernel_maps(self, pid); |
a1645ce1 ZY |
2429 | } |
2430 | failure: | |
2431 | free(namelist); | |
2432 | } | |
2433 | ||
2434 | return ret; | |
2435 | } | |
5c0541d5 | 2436 | |
076c6e45 ACM |
2437 | void machines__destroy_guest_kernel_maps(struct rb_root *self) |
2438 | { | |
2439 | struct rb_node *next = rb_first(self); | |
2440 | ||
2441 | while (next) { | |
2442 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
2443 | ||
2444 | next = rb_next(&pos->rb_node); | |
2445 | rb_erase(&pos->rb_node, self); | |
2446 | machine__delete(pos); | |
2447 | } | |
2448 | } | |
2449 | ||
5c0541d5 ACM |
2450 | int machine__load_kallsyms(struct machine *self, const char *filename, |
2451 | enum map_type type, symbol_filter_t filter) | |
2452 | { | |
2453 | struct map *map = self->vmlinux_maps[type]; | |
2454 | int ret = dso__load_kallsyms(map->dso, filename, map, filter); | |
2455 | ||
2456 | if (ret > 0) { | |
2457 | dso__set_loaded(map->dso, type); | |
2458 | /* | |
2459 | * Since /proc/kallsyms will have multiple sessions for the | |
2460 | * kernel, with modules between them, fixup the end of all | |
2461 | * sections. | |
2462 | */ | |
2463 | __map_groups__fixup_end(&self->kmaps, type); | |
2464 | } | |
2465 | ||
2466 | return ret; | |
2467 | } | |
2468 | ||
2469 | int machine__load_vmlinux_path(struct machine *self, enum map_type type, | |
2470 | symbol_filter_t filter) | |
2471 | { | |
2472 | struct map *map = self->vmlinux_maps[type]; | |
2473 | int ret = dso__load_vmlinux_path(map->dso, map, filter); | |
2474 | ||
2475 | if (ret > 0) { | |
2476 | dso__set_loaded(map->dso, type); | |
2477 | map__reloc_vmlinux(map); | |
2478 | } | |
2479 | ||
2480 | return ret; | |
2481 | } |