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