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 | ||
70c3856b EM |
1082 | if (opdsec && sym.st_shndx == opdidx) { |
1083 | u32 offset = sym.st_value - opdshdr.sh_addr; | |
1084 | u64 *opd = opddata->d_buf + offset; | |
1085 | sym.st_value = *opd; | |
1086 | sym.st_shndx = elf_addr_to_index(elf, sym.st_value); | |
1087 | } | |
1088 | ||
a2928c42 ACM |
1089 | sec = elf_getscn(elf, sym.st_shndx); |
1090 | if (!sec) | |
1091 | goto out_elf_end; | |
1092 | ||
1093 | gelf_getshdr(sec, &shdr); | |
6cfcc53e | 1094 | |
d45868d3 | 1095 | if (is_label && !elf_sec__is_a(&shdr, secstrs, map->type)) |
6cfcc53e MG |
1096 | continue; |
1097 | ||
1098 | section_name = elf_sec__name(&shdr, secstrs); | |
0b73da3f | 1099 | |
a1645ce1 | 1100 | if (self->kernel != DSO_TYPE_USER || kmodule) { |
2e538c4a ACM |
1101 | char dso_name[PATH_MAX]; |
1102 | ||
1103 | if (strcmp(section_name, | |
b63be8d7 ACM |
1104 | (curr_dso->short_name + |
1105 | self->short_name_len)) == 0) | |
2e538c4a ACM |
1106 | goto new_symbol; |
1107 | ||
1108 | if (strcmp(section_name, ".text") == 0) { | |
1109 | curr_map = map; | |
1110 | curr_dso = self; | |
1111 | goto new_symbol; | |
1112 | } | |
1113 | ||
1114 | snprintf(dso_name, sizeof(dso_name), | |
1115 | "%s%s", self->short_name, section_name); | |
1116 | ||
9de89fe7 | 1117 | curr_map = map_groups__find_by_name(kmap->kmaps, map->type, dso_name); |
2e538c4a ACM |
1118 | if (curr_map == NULL) { |
1119 | u64 start = sym.st_value; | |
1120 | ||
1121 | if (kmodule) | |
1122 | start += map->start + shdr.sh_offset; | |
1123 | ||
00a192b3 | 1124 | curr_dso = dso__new(dso_name); |
2e538c4a ACM |
1125 | if (curr_dso == NULL) |
1126 | goto out_elf_end; | |
a1645ce1 | 1127 | curr_dso->kernel = self->kernel; |
3610583c | 1128 | curr_map = map__new2(start, curr_dso, |
6275ce2d | 1129 | map->type); |
2e538c4a ACM |
1130 | if (curr_map == NULL) { |
1131 | dso__delete(curr_dso); | |
1132 | goto out_elf_end; | |
1133 | } | |
ed52ce2e ACM |
1134 | curr_map->map_ip = identity__map_ip; |
1135 | curr_map->unmap_ip = identity__map_ip; | |
b0a9ab62 | 1136 | curr_dso->origin = self->origin; |
9de89fe7 | 1137 | map_groups__insert(kmap->kmaps, curr_map); |
a1645ce1 | 1138 | dsos__add(&self->node, curr_dso); |
6275ce2d | 1139 | dso__set_loaded(curr_dso, map->type); |
2e538c4a ACM |
1140 | } else |
1141 | curr_dso = curr_map->dso; | |
1142 | ||
1143 | goto new_symbol; | |
af427bf5 ACM |
1144 | } |
1145 | ||
2e538c4a | 1146 | if (curr_dso->adjust_symbols) { |
29a9f66d ACM |
1147 | pr_debug4("%s: adjusting symbol: st_value: %#Lx " |
1148 | "sh_addr: %#Lx sh_offset: %#Lx\n", __func__, | |
1149 | (u64)sym.st_value, (u64)shdr.sh_addr, | |
1150 | (u64)shdr.sh_offset); | |
f5812a7a | 1151 | sym.st_value -= shdr.sh_addr - shdr.sh_offset; |
af427bf5 | 1152 | } |
28ac909b ACM |
1153 | /* |
1154 | * We need to figure out if the object was created from C++ sources | |
1155 | * DWARF DW_compile_unit has this, but we don't always have access | |
1156 | * to it... | |
1157 | */ | |
83a0944f | 1158 | demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI); |
28ac909b | 1159 | if (demangled != NULL) |
83a0944f | 1160 | elf_name = demangled; |
2e538c4a | 1161 | new_symbol: |
c408fedf ACM |
1162 | f = symbol__new(sym.st_value, sym.st_size, |
1163 | GELF_ST_BIND(sym.st_info), elf_name); | |
28ac909b | 1164 | free(demangled); |
a2928c42 ACM |
1165 | if (!f) |
1166 | goto out_elf_end; | |
1167 | ||
2e538c4a | 1168 | if (filter && filter(curr_map, f)) |
00a192b3 | 1169 | symbol__delete(f); |
69ee69f6 | 1170 | else { |
6a4694a4 | 1171 | symbols__insert(&curr_dso->symbols[curr_map->type], f); |
69ee69f6 ACM |
1172 | nr++; |
1173 | } | |
a2928c42 ACM |
1174 | } |
1175 | ||
2e538c4a ACM |
1176 | /* |
1177 | * For misannotated, zeroed, ASM function sizes. | |
1178 | */ | |
6275ce2d | 1179 | if (nr > 0) { |
6a4694a4 | 1180 | symbols__fixup_end(&self->symbols[map->type]); |
6275ce2d ACM |
1181 | if (kmap) { |
1182 | /* | |
1183 | * We need to fixup this here too because we create new | |
1184 | * maps here, for things like vsyscall sections. | |
1185 | */ | |
1186 | __map_groups__fixup_end(kmap->kmaps, map->type); | |
1187 | } | |
1188 | } | |
a2928c42 ACM |
1189 | err = nr; |
1190 | out_elf_end: | |
1191 | elf_end(elf); | |
1192 | out_close: | |
1193 | return err; | |
1194 | } | |
1195 | ||
78075caa ACM |
1196 | static bool dso__build_id_equal(const struct dso *self, u8 *build_id) |
1197 | { | |
1198 | return memcmp(self->build_id, build_id, sizeof(self->build_id)) == 0; | |
1199 | } | |
1200 | ||
a1645ce1 | 1201 | bool __dsos__read_build_ids(struct list_head *head, bool with_hits) |
57f395a7 | 1202 | { |
e30a3d12 | 1203 | bool have_build_id = false; |
57f395a7 FW |
1204 | struct dso *pos; |
1205 | ||
6122e4e4 ACM |
1206 | list_for_each_entry(pos, head, node) { |
1207 | if (with_hits && !pos->hit) | |
1208 | continue; | |
f6e1467d ACM |
1209 | if (pos->has_build_id) { |
1210 | have_build_id = true; | |
1211 | continue; | |
1212 | } | |
e30a3d12 ACM |
1213 | if (filename__read_build_id(pos->long_name, pos->build_id, |
1214 | sizeof(pos->build_id)) > 0) { | |
1215 | have_build_id = true; | |
1216 | pos->has_build_id = true; | |
1217 | } | |
6122e4e4 | 1218 | } |
57f395a7 | 1219 | |
e30a3d12 | 1220 | return have_build_id; |
57f395a7 FW |
1221 | } |
1222 | ||
fd7a346e ACM |
1223 | /* |
1224 | * Align offset to 4 bytes as needed for note name and descriptor data. | |
1225 | */ | |
1226 | #define NOTE_ALIGN(n) (((n) + 3) & -4U) | |
1227 | ||
21916c38 | 1228 | static int elf_read_build_id(Elf *elf, void *bf, size_t size) |
4d1e00a8 | 1229 | { |
21916c38 | 1230 | int err = -1; |
4d1e00a8 ACM |
1231 | GElf_Ehdr ehdr; |
1232 | GElf_Shdr shdr; | |
fd7a346e | 1233 | Elf_Data *data; |
4d1e00a8 | 1234 | Elf_Scn *sec; |
e57cfcda | 1235 | Elf_Kind ek; |
fd7a346e | 1236 | void *ptr; |
4d1e00a8 | 1237 | |
2643ce11 ACM |
1238 | if (size < BUILD_ID_SIZE) |
1239 | goto out; | |
1240 | ||
e57cfcda PE |
1241 | ek = elf_kind(elf); |
1242 | if (ek != ELF_K_ELF) | |
21916c38 | 1243 | goto out; |
e57cfcda | 1244 | |
4d1e00a8 | 1245 | if (gelf_getehdr(elf, &ehdr) == NULL) { |
6beba7ad | 1246 | pr_err("%s: cannot get elf header.\n", __func__); |
21916c38 | 1247 | goto out; |
4d1e00a8 ACM |
1248 | } |
1249 | ||
2643ce11 ACM |
1250 | sec = elf_section_by_name(elf, &ehdr, &shdr, |
1251 | ".note.gnu.build-id", NULL); | |
fd7a346e ACM |
1252 | if (sec == NULL) { |
1253 | sec = elf_section_by_name(elf, &ehdr, &shdr, | |
1254 | ".notes", NULL); | |
1255 | if (sec == NULL) | |
21916c38 | 1256 | goto out; |
fd7a346e | 1257 | } |
4d1e00a8 | 1258 | |
fd7a346e ACM |
1259 | data = elf_getdata(sec, NULL); |
1260 | if (data == NULL) | |
21916c38 | 1261 | goto out; |
fd7a346e ACM |
1262 | |
1263 | ptr = data->d_buf; | |
1264 | while (ptr < (data->d_buf + data->d_size)) { | |
1265 | GElf_Nhdr *nhdr = ptr; | |
1266 | int namesz = NOTE_ALIGN(nhdr->n_namesz), | |
1267 | descsz = NOTE_ALIGN(nhdr->n_descsz); | |
1268 | const char *name; | |
1269 | ||
1270 | ptr += sizeof(*nhdr); | |
1271 | name = ptr; | |
1272 | ptr += namesz; | |
1273 | if (nhdr->n_type == NT_GNU_BUILD_ID && | |
1274 | nhdr->n_namesz == sizeof("GNU")) { | |
1275 | if (memcmp(name, "GNU", sizeof("GNU")) == 0) { | |
1276 | memcpy(bf, ptr, BUILD_ID_SIZE); | |
1277 | err = BUILD_ID_SIZE; | |
1278 | break; | |
1279 | } | |
1280 | } | |
1281 | ptr += descsz; | |
1282 | } | |
21916c38 DM |
1283 | |
1284 | out: | |
1285 | return err; | |
1286 | } | |
1287 | ||
1288 | int filename__read_build_id(const char *filename, void *bf, size_t size) | |
1289 | { | |
1290 | int fd, err = -1; | |
1291 | Elf *elf; | |
1292 | ||
1293 | if (size < BUILD_ID_SIZE) | |
1294 | goto out; | |
1295 | ||
1296 | fd = open(filename, O_RDONLY); | |
1297 | if (fd < 0) | |
1298 | goto out; | |
1299 | ||
1300 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); | |
1301 | if (elf == NULL) { | |
1302 | pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename); | |
1303 | goto out_close; | |
1304 | } | |
1305 | ||
1306 | err = elf_read_build_id(elf, bf, size); | |
1307 | ||
2643ce11 ACM |
1308 | elf_end(elf); |
1309 | out_close: | |
1310 | close(fd); | |
1311 | out: | |
1312 | return err; | |
1313 | } | |
1314 | ||
f1617b40 ACM |
1315 | int sysfs__read_build_id(const char *filename, void *build_id, size_t size) |
1316 | { | |
1317 | int fd, err = -1; | |
1318 | ||
1319 | if (size < BUILD_ID_SIZE) | |
1320 | goto out; | |
1321 | ||
1322 | fd = open(filename, O_RDONLY); | |
1323 | if (fd < 0) | |
1324 | goto out; | |
1325 | ||
1326 | while (1) { | |
1327 | char bf[BUFSIZ]; | |
1328 | GElf_Nhdr nhdr; | |
1329 | int namesz, descsz; | |
1330 | ||
1331 | if (read(fd, &nhdr, sizeof(nhdr)) != sizeof(nhdr)) | |
1332 | break; | |
1333 | ||
fd7a346e ACM |
1334 | namesz = NOTE_ALIGN(nhdr.n_namesz); |
1335 | descsz = NOTE_ALIGN(nhdr.n_descsz); | |
f1617b40 ACM |
1336 | if (nhdr.n_type == NT_GNU_BUILD_ID && |
1337 | nhdr.n_namesz == sizeof("GNU")) { | |
1338 | if (read(fd, bf, namesz) != namesz) | |
1339 | break; | |
1340 | if (memcmp(bf, "GNU", sizeof("GNU")) == 0) { | |
1341 | if (read(fd, build_id, | |
1342 | BUILD_ID_SIZE) == BUILD_ID_SIZE) { | |
1343 | err = 0; | |
1344 | break; | |
1345 | } | |
1346 | } else if (read(fd, bf, descsz) != descsz) | |
1347 | break; | |
1348 | } else { | |
1349 | int n = namesz + descsz; | |
1350 | if (read(fd, bf, n) != n) | |
1351 | break; | |
1352 | } | |
1353 | } | |
1354 | close(fd); | |
1355 | out: | |
1356 | return err; | |
1357 | } | |
1358 | ||
94cb9e38 ACM |
1359 | char dso__symtab_origin(const struct dso *self) |
1360 | { | |
1361 | static const char origin[] = { | |
1362 | [DSO__ORIG_KERNEL] = 'k', | |
1363 | [DSO__ORIG_JAVA_JIT] = 'j', | |
4cf40131 | 1364 | [DSO__ORIG_BUILD_ID_CACHE] = 'B', |
94cb9e38 ACM |
1365 | [DSO__ORIG_FEDORA] = 'f', |
1366 | [DSO__ORIG_UBUNTU] = 'u', | |
1367 | [DSO__ORIG_BUILDID] = 'b', | |
1368 | [DSO__ORIG_DSO] = 'd', | |
439d473b | 1369 | [DSO__ORIG_KMODULE] = 'K', |
a1645ce1 ZY |
1370 | [DSO__ORIG_GUEST_KERNEL] = 'g', |
1371 | [DSO__ORIG_GUEST_KMODULE] = 'G', | |
94cb9e38 ACM |
1372 | }; |
1373 | ||
1374 | if (self == NULL || self->origin == DSO__ORIG_NOT_FOUND) | |
1375 | return '!'; | |
1376 | return origin[self->origin]; | |
1377 | } | |
1378 | ||
9de89fe7 | 1379 | int dso__load(struct dso *self, struct map *map, symbol_filter_t filter) |
a2928c42 | 1380 | { |
4d1e00a8 | 1381 | int size = PATH_MAX; |
c338aee8 | 1382 | char *name; |
a2928c42 ACM |
1383 | int ret = -1; |
1384 | int fd; | |
23346f21 | 1385 | struct machine *machine; |
a1645ce1 | 1386 | const char *root_dir; |
6da80ce8 | 1387 | int want_symtab; |
a2928c42 | 1388 | |
3610583c | 1389 | dso__set_loaded(self, map->type); |
66bd8424 | 1390 | |
a1645ce1 | 1391 | if (self->kernel == DSO_TYPE_KERNEL) |
9de89fe7 | 1392 | return dso__load_kernel_sym(self, map, filter); |
a1645ce1 ZY |
1393 | else if (self->kernel == DSO_TYPE_GUEST_KERNEL) |
1394 | return dso__load_guest_kernel_sym(self, map, filter); | |
1395 | ||
23346f21 ACM |
1396 | if (map->groups && map->groups->machine) |
1397 | machine = map->groups->machine; | |
a1645ce1 | 1398 | else |
23346f21 | 1399 | machine = NULL; |
c338aee8 ACM |
1400 | |
1401 | name = malloc(size); | |
a2928c42 ACM |
1402 | if (!name) |
1403 | return -1; | |
1404 | ||
30d7a77d | 1405 | self->adjust_symbols = 0; |
f5812a7a | 1406 | |
94cb9e38 | 1407 | if (strncmp(self->name, "/tmp/perf-", 10) == 0) { |
6beba7ad | 1408 | ret = dso__load_perf_map(self, map, filter); |
94cb9e38 ACM |
1409 | self->origin = ret > 0 ? DSO__ORIG_JAVA_JIT : |
1410 | DSO__ORIG_NOT_FOUND; | |
1411 | return ret; | |
1412 | } | |
1413 | ||
6da80ce8 DM |
1414 | /* Iterate over candidate debug images. |
1415 | * On the first pass, only load images if they have a full symtab. | |
1416 | * Failing that, do a second pass where we accept .dynsym also | |
1417 | */ | |
1418 | for (self->origin = DSO__ORIG_BUILD_ID_CACHE, want_symtab = 1; | |
1419 | self->origin != DSO__ORIG_NOT_FOUND; | |
1420 | self->origin++) { | |
94cb9e38 | 1421 | switch (self->origin) { |
6da80ce8 DM |
1422 | case DSO__ORIG_BUILD_ID_CACHE: |
1423 | if (dso__build_id_filename(self, name, size) == NULL) | |
1424 | continue; | |
1425 | break; | |
94cb9e38 | 1426 | case DSO__ORIG_FEDORA: |
439d473b ACM |
1427 | snprintf(name, size, "/usr/lib/debug%s.debug", |
1428 | self->long_name); | |
a2928c42 | 1429 | break; |
94cb9e38 | 1430 | case DSO__ORIG_UBUNTU: |
439d473b ACM |
1431 | snprintf(name, size, "/usr/lib/debug%s", |
1432 | self->long_name); | |
a2928c42 | 1433 | break; |
6da80ce8 DM |
1434 | case DSO__ORIG_BUILDID: { |
1435 | char build_id_hex[BUILD_ID_SIZE * 2 + 1]; | |
1436 | ||
1437 | if (!self->has_build_id) | |
1438 | continue; | |
1439 | ||
1440 | build_id__sprintf(self->build_id, | |
1441 | sizeof(self->build_id), | |
1442 | build_id_hex); | |
1443 | snprintf(name, size, | |
1444 | "/usr/lib/debug/.build-id/%.2s/%s.debug", | |
1445 | build_id_hex, build_id_hex + 2); | |
4d1e00a8 | 1446 | } |
6da80ce8 | 1447 | break; |
94cb9e38 | 1448 | case DSO__ORIG_DSO: |
439d473b | 1449 | snprintf(name, size, "%s", self->long_name); |
a2928c42 | 1450 | break; |
a1645ce1 | 1451 | case DSO__ORIG_GUEST_KMODULE: |
23346f21 ACM |
1452 | if (map->groups && map->groups->machine) |
1453 | root_dir = map->groups->machine->root_dir; | |
a1645ce1 ZY |
1454 | else |
1455 | root_dir = ""; | |
1456 | snprintf(name, size, "%s%s", root_dir, self->long_name); | |
1457 | break; | |
a2928c42 ACM |
1458 | |
1459 | default: | |
6da80ce8 DM |
1460 | /* |
1461 | * If we wanted a full symtab but no image had one, | |
1462 | * relax our requirements and repeat the search. | |
1463 | */ | |
1464 | if (want_symtab) { | |
1465 | want_symtab = 0; | |
1466 | self->origin = DSO__ORIG_BUILD_ID_CACHE; | |
1467 | } else | |
1468 | continue; | |
a2928c42 | 1469 | } |
6da80ce8 DM |
1470 | |
1471 | /* Name is now the name of the next image to try */ | |
a2928c42 | 1472 | fd = open(name, O_RDONLY); |
6da80ce8 DM |
1473 | if (fd < 0) |
1474 | continue; | |
a2928c42 | 1475 | |
6da80ce8 DM |
1476 | ret = dso__load_sym(self, map, name, fd, filter, 0, |
1477 | want_symtab); | |
1478 | close(fd); | |
a2928c42 | 1479 | |
6da80ce8 DM |
1480 | /* |
1481 | * Some people seem to have debuginfo files _WITHOUT_ debug | |
1482 | * info!?!? | |
1483 | */ | |
1484 | if (!ret) | |
1485 | continue; | |
a2928c42 | 1486 | |
6da80ce8 DM |
1487 | if (ret > 0) { |
1488 | int nr_plt = dso__synthesize_plt_symbols(self, map, filter); | |
1489 | if (nr_plt > 0) | |
1490 | ret += nr_plt; | |
1491 | break; | |
1492 | } | |
a25e46c4 | 1493 | } |
6da80ce8 | 1494 | |
a2928c42 | 1495 | free(name); |
1340e6bb ACM |
1496 | if (ret < 0 && strstr(self->name, " (deleted)") != NULL) |
1497 | return 0; | |
a2928c42 ACM |
1498 | return ret; |
1499 | } | |
1500 | ||
79406cd7 ACM |
1501 | struct map *map_groups__find_by_name(struct map_groups *self, |
1502 | enum map_type type, const char *name) | |
439d473b ACM |
1503 | { |
1504 | struct rb_node *nd; | |
1505 | ||
79406cd7 | 1506 | for (nd = rb_first(&self->maps[type]); nd; nd = rb_next(nd)) { |
439d473b ACM |
1507 | struct map *map = rb_entry(nd, struct map, rb_node); |
1508 | ||
b7cece76 | 1509 | if (map->dso && strcmp(map->dso->short_name, name) == 0) |
439d473b ACM |
1510 | return map; |
1511 | } | |
1512 | ||
1513 | return NULL; | |
1514 | } | |
1515 | ||
a1645ce1 ZY |
1516 | static int dso__kernel_module_get_build_id(struct dso *self, |
1517 | const char *root_dir) | |
b7cece76 ACM |
1518 | { |
1519 | char filename[PATH_MAX]; | |
1520 | /* | |
1521 | * kernel module short names are of the form "[module]" and | |
1522 | * we need just "module" here. | |
1523 | */ | |
1524 | const char *name = self->short_name + 1; | |
1525 | ||
1526 | snprintf(filename, sizeof(filename), | |
a1645ce1 ZY |
1527 | "%s/sys/module/%.*s/notes/.note.gnu.build-id", |
1528 | root_dir, (int)strlen(name) - 1, name); | |
b7cece76 ACM |
1529 | |
1530 | if (sysfs__read_build_id(filename, self->build_id, | |
1531 | sizeof(self->build_id)) == 0) | |
1532 | self->has_build_id = true; | |
1533 | ||
1534 | return 0; | |
1535 | } | |
1536 | ||
a1645ce1 ZY |
1537 | static int map_groups__set_modules_path_dir(struct map_groups *self, |
1538 | const char *dir_name) | |
6cfcc53e | 1539 | { |
439d473b | 1540 | struct dirent *dent; |
5aab621b | 1541 | DIR *dir = opendir(dir_name); |
74534341 | 1542 | int ret = 0; |
6cfcc53e | 1543 | |
439d473b | 1544 | if (!dir) { |
5aab621b | 1545 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); |
439d473b ACM |
1546 | return -1; |
1547 | } | |
6cfcc53e | 1548 | |
439d473b ACM |
1549 | while ((dent = readdir(dir)) != NULL) { |
1550 | char path[PATH_MAX]; | |
a1645ce1 ZY |
1551 | struct stat st; |
1552 | ||
1553 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
1554 | sprintf(path, "%s/%s", dir_name, dent->d_name); | |
1555 | if (stat(path, &st)) | |
1556 | continue; | |
439d473b | 1557 | |
a1645ce1 | 1558 | if (S_ISDIR(st.st_mode)) { |
439d473b ACM |
1559 | if (!strcmp(dent->d_name, ".") || |
1560 | !strcmp(dent->d_name, "..")) | |
1561 | continue; | |
1562 | ||
1563 | snprintf(path, sizeof(path), "%s/%s", | |
5aab621b | 1564 | dir_name, dent->d_name); |
74534341 GJ |
1565 | ret = map_groups__set_modules_path_dir(self, path); |
1566 | if (ret < 0) | |
1567 | goto out; | |
439d473b ACM |
1568 | } else { |
1569 | char *dot = strrchr(dent->d_name, '.'), | |
1570 | dso_name[PATH_MAX]; | |
1571 | struct map *map; | |
cfc10d3b | 1572 | char *long_name; |
439d473b ACM |
1573 | |
1574 | if (dot == NULL || strcmp(dot, ".ko")) | |
1575 | continue; | |
1576 | snprintf(dso_name, sizeof(dso_name), "[%.*s]", | |
1577 | (int)(dot - dent->d_name), dent->d_name); | |
1578 | ||
a2a99e8e | 1579 | strxfrchar(dso_name, '-', '_'); |
9de89fe7 | 1580 | map = map_groups__find_by_name(self, MAP__FUNCTION, dso_name); |
439d473b ACM |
1581 | if (map == NULL) |
1582 | continue; | |
1583 | ||
1584 | snprintf(path, sizeof(path), "%s/%s", | |
5aab621b | 1585 | dir_name, dent->d_name); |
439d473b | 1586 | |
cfc10d3b | 1587 | long_name = strdup(path); |
74534341 GJ |
1588 | if (long_name == NULL) { |
1589 | ret = -1; | |
1590 | goto out; | |
1591 | } | |
cfc10d3b | 1592 | dso__set_long_name(map->dso, long_name); |
6e406257 | 1593 | map->dso->lname_alloc = 1; |
a1645ce1 | 1594 | dso__kernel_module_get_build_id(map->dso, ""); |
439d473b | 1595 | } |
439d473b | 1596 | } |
6cfcc53e | 1597 | |
74534341 | 1598 | out: |
439d473b | 1599 | closedir(dir); |
74534341 | 1600 | return ret; |
439d473b | 1601 | } |
6cfcc53e | 1602 | |
a1645ce1 | 1603 | static char *get_kernel_version(const char *root_dir) |
439d473b | 1604 | { |
a1645ce1 ZY |
1605 | char version[PATH_MAX]; |
1606 | FILE *file; | |
1607 | char *name, *tmp; | |
1608 | const char *prefix = "Linux version "; | |
1609 | ||
1610 | sprintf(version, "%s/proc/version", root_dir); | |
1611 | file = fopen(version, "r"); | |
1612 | if (!file) | |
1613 | return NULL; | |
1614 | ||
1615 | version[0] = '\0'; | |
1616 | tmp = fgets(version, sizeof(version), file); | |
1617 | fclose(file); | |
1618 | ||
1619 | name = strstr(version, prefix); | |
1620 | if (!name) | |
1621 | return NULL; | |
1622 | name += strlen(prefix); | |
1623 | tmp = strchr(name, ' '); | |
1624 | if (tmp) | |
1625 | *tmp = '\0'; | |
1626 | ||
1627 | return strdup(name); | |
1628 | } | |
1629 | ||
d28c6223 | 1630 | static int machine__set_modules_path(struct machine *self) |
a1645ce1 ZY |
1631 | { |
1632 | char *version; | |
439d473b | 1633 | char modules_path[PATH_MAX]; |
6cfcc53e | 1634 | |
d28c6223 | 1635 | version = get_kernel_version(self->root_dir); |
a1645ce1 | 1636 | if (!version) |
439d473b | 1637 | return -1; |
6cfcc53e | 1638 | |
a1645ce1 | 1639 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s/kernel", |
d28c6223 | 1640 | self->root_dir, version); |
a1645ce1 | 1641 | free(version); |
6cfcc53e | 1642 | |
d28c6223 | 1643 | return map_groups__set_modules_path_dir(&self->kmaps, modules_path); |
6cfcc53e MG |
1644 | } |
1645 | ||
439d473b ACM |
1646 | /* |
1647 | * Constructor variant for modules (where we know from /proc/modules where | |
1648 | * they are loaded) and for vmlinux, where only after we load all the | |
1649 | * symbols we'll know where it starts and ends. | |
1650 | */ | |
3610583c | 1651 | static struct map *map__new2(u64 start, struct dso *dso, enum map_type type) |
6cfcc53e | 1652 | { |
5aab621b ACM |
1653 | struct map *self = calloc(1, (sizeof(*self) + |
1654 | (dso->kernel ? sizeof(struct kmap) : 0))); | |
439d473b | 1655 | if (self != NULL) { |
439d473b | 1656 | /* |
afb7b4f0 | 1657 | * ->end will be filled after we load all the symbols |
439d473b | 1658 | */ |
3610583c | 1659 | map__init(self, type, start, 0, 0, dso); |
439d473b | 1660 | } |
afb7b4f0 | 1661 | |
439d473b ACM |
1662 | return self; |
1663 | } | |
1664 | ||
d28c6223 ACM |
1665 | struct map *machine__new_module(struct machine *self, u64 start, |
1666 | const char *filename) | |
b7cece76 ACM |
1667 | { |
1668 | struct map *map; | |
d28c6223 | 1669 | struct dso *dso = __dsos__findnew(&self->kernel_dsos, filename); |
b7cece76 ACM |
1670 | |
1671 | if (dso == NULL) | |
1672 | return NULL; | |
1673 | ||
1674 | map = map__new2(start, dso, MAP__FUNCTION); | |
1675 | if (map == NULL) | |
1676 | return NULL; | |
1677 | ||
d28c6223 | 1678 | if (machine__is_host(self)) |
a1645ce1 ZY |
1679 | dso->origin = DSO__ORIG_KMODULE; |
1680 | else | |
1681 | dso->origin = DSO__ORIG_GUEST_KMODULE; | |
d28c6223 | 1682 | map_groups__insert(&self->kmaps, map); |
b7cece76 ACM |
1683 | return map; |
1684 | } | |
1685 | ||
d28c6223 | 1686 | static int machine__create_modules(struct machine *self) |
439d473b ACM |
1687 | { |
1688 | char *line = NULL; | |
1689 | size_t n; | |
a1645ce1 | 1690 | FILE *file; |
439d473b | 1691 | struct map *map; |
a1645ce1 ZY |
1692 | const char *modules; |
1693 | char path[PATH_MAX]; | |
1694 | ||
d28c6223 | 1695 | if (machine__is_default_guest(self)) |
a1645ce1 ZY |
1696 | modules = symbol_conf.default_guest_modules; |
1697 | else { | |
d28c6223 | 1698 | sprintf(path, "%s/proc/modules", self->root_dir); |
a1645ce1 ZY |
1699 | modules = path; |
1700 | } | |
6cfcc53e | 1701 | |
a1645ce1 | 1702 | file = fopen(modules, "r"); |
439d473b ACM |
1703 | if (file == NULL) |
1704 | return -1; | |
6cfcc53e | 1705 | |
439d473b ACM |
1706 | while (!feof(file)) { |
1707 | char name[PATH_MAX]; | |
1708 | u64 start; | |
439d473b ACM |
1709 | char *sep; |
1710 | int line_len; | |
6cfcc53e | 1711 | |
439d473b ACM |
1712 | line_len = getline(&line, &n, file); |
1713 | if (line_len < 0) | |
1714 | break; | |
1715 | ||
1716 | if (!line) | |
1717 | goto out_failure; | |
1718 | ||
1719 | line[--line_len] = '\0'; /* \n */ | |
1720 | ||
1721 | sep = strrchr(line, 'x'); | |
1722 | if (sep == NULL) | |
1723 | continue; | |
1724 | ||
1725 | hex2u64(sep + 1, &start); | |
1726 | ||
1727 | sep = strchr(line, ' '); | |
1728 | if (sep == NULL) | |
1729 | continue; | |
1730 | ||
1731 | *sep = '\0'; | |
1732 | ||
1733 | snprintf(name, sizeof(name), "[%s]", line); | |
d28c6223 | 1734 | map = machine__new_module(self, start, name); |
b7cece76 | 1735 | if (map == NULL) |
439d473b | 1736 | goto out_delete_line; |
d28c6223 | 1737 | dso__kernel_module_get_build_id(map->dso, self->root_dir); |
6cfcc53e | 1738 | } |
439d473b ACM |
1739 | |
1740 | free(line); | |
1741 | fclose(file); | |
1742 | ||
d28c6223 | 1743 | return machine__set_modules_path(self); |
439d473b ACM |
1744 | |
1745 | out_delete_line: | |
1746 | free(line); | |
1747 | out_failure: | |
1748 | return -1; | |
6cfcc53e MG |
1749 | } |
1750 | ||
9958e1f0 | 1751 | static int dso__load_vmlinux(struct dso *self, struct map *map, |
6beba7ad | 1752 | const char *vmlinux, symbol_filter_t filter) |
a2928c42 | 1753 | { |
fbd733b8 | 1754 | int err = -1, fd; |
a2928c42 | 1755 | |
fbd733b8 | 1756 | fd = open(vmlinux, O_RDONLY); |
a2928c42 ACM |
1757 | if (fd < 0) |
1758 | return -1; | |
1759 | ||
3610583c | 1760 | dso__set_loaded(self, map->type); |
6da80ce8 | 1761 | err = dso__load_sym(self, map, vmlinux, fd, filter, 0, 0); |
a2928c42 ACM |
1762 | close(fd); |
1763 | ||
3846df2e ACM |
1764 | if (err > 0) |
1765 | pr_debug("Using %s for symbols\n", vmlinux); | |
1766 | ||
a2928c42 ACM |
1767 | return err; |
1768 | } | |
1769 | ||
a19afe46 | 1770 | int dso__load_vmlinux_path(struct dso *self, struct map *map, |
9de89fe7 | 1771 | symbol_filter_t filter) |
a19afe46 ACM |
1772 | { |
1773 | int i, err = 0; | |
5ad90e4e | 1774 | char *filename; |
a19afe46 ACM |
1775 | |
1776 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", | |
5ad90e4e ACM |
1777 | vmlinux_path__nr_entries + 1); |
1778 | ||
1779 | filename = dso__build_id_filename(self, NULL, 0); | |
1780 | if (filename != NULL) { | |
1781 | err = dso__load_vmlinux(self, map, filename, filter); | |
1782 | if (err > 0) { | |
1783 | dso__set_long_name(self, filename); | |
1784 | goto out; | |
1785 | } | |
1786 | free(filename); | |
1787 | } | |
a19afe46 ACM |
1788 | |
1789 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { | |
9de89fe7 | 1790 | err = dso__load_vmlinux(self, map, vmlinux_path[i], filter); |
a19afe46 | 1791 | if (err > 0) { |
a19afe46 ACM |
1792 | dso__set_long_name(self, strdup(vmlinux_path[i])); |
1793 | break; | |
1794 | } | |
1795 | } | |
5ad90e4e | 1796 | out: |
a19afe46 ACM |
1797 | return err; |
1798 | } | |
1799 | ||
c338aee8 | 1800 | static int dso__load_kernel_sym(struct dso *self, struct map *map, |
9de89fe7 | 1801 | symbol_filter_t filter) |
a827c875 | 1802 | { |
cc612d81 | 1803 | int err; |
9e201442 ACM |
1804 | const char *kallsyms_filename = NULL; |
1805 | char *kallsyms_allocated_filename = NULL; | |
dc8d6ab2 ACM |
1806 | /* |
1807 | * Step 1: if the user specified a vmlinux filename, use it and only | |
1808 | * it, reporting errors to the user if it cannot be used. | |
1809 | * | |
1810 | * For instance, try to analyse an ARM perf.data file _without_ a | |
1811 | * build-id, or if the user specifies the wrong path to the right | |
1812 | * vmlinux file, obviously we can't fallback to another vmlinux (a | |
1813 | * x86_86 one, on the machine where analysis is being performed, say), | |
1814 | * or worse, /proc/kallsyms. | |
1815 | * | |
1816 | * If the specified file _has_ a build-id and there is a build-id | |
1817 | * section in the perf.data file, we will still do the expected | |
1818 | * validation in dso__load_vmlinux and will bail out if they don't | |
1819 | * match. | |
1820 | */ | |
1821 | if (symbol_conf.vmlinux_name != NULL) { | |
9de89fe7 | 1822 | err = dso__load_vmlinux(self, map, |
dc8d6ab2 | 1823 | symbol_conf.vmlinux_name, filter); |
e7dadc00 ACM |
1824 | if (err > 0) { |
1825 | dso__set_long_name(self, | |
1826 | strdup(symbol_conf.vmlinux_name)); | |
1827 | goto out_fixup; | |
1828 | } | |
1829 | return err; | |
dc8d6ab2 | 1830 | } |
cc612d81 ACM |
1831 | |
1832 | if (vmlinux_path != NULL) { | |
9de89fe7 | 1833 | err = dso__load_vmlinux_path(self, map, filter); |
a19afe46 ACM |
1834 | if (err > 0) |
1835 | goto out_fixup; | |
cc612d81 ACM |
1836 | } |
1837 | ||
b7cece76 ACM |
1838 | /* |
1839 | * Say the kernel DSO was created when processing the build-id header table, | |
1840 | * we have a build-id, so check if it is the same as the running kernel, | |
1841 | * using it if it is. | |
1842 | */ | |
1843 | if (self->has_build_id) { | |
1844 | u8 kallsyms_build_id[BUILD_ID_SIZE]; | |
9e201442 | 1845 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; |
b7cece76 ACM |
1846 | |
1847 | if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id, | |
8d0591f6 | 1848 | sizeof(kallsyms_build_id)) == 0) { |
9e201442 ACM |
1849 | if (dso__build_id_equal(self, kallsyms_build_id)) { |
1850 | kallsyms_filename = "/proc/kallsyms"; | |
8d0591f6 | 1851 | goto do_kallsyms; |
9e201442 | 1852 | } |
8d0591f6 | 1853 | } |
dc8d6ab2 ACM |
1854 | /* |
1855 | * Now look if we have it on the build-id cache in | |
1856 | * $HOME/.debug/[kernel.kallsyms]. | |
1857 | */ | |
9e201442 ACM |
1858 | build_id__sprintf(self->build_id, sizeof(self->build_id), |
1859 | sbuild_id); | |
1860 | ||
1861 | if (asprintf(&kallsyms_allocated_filename, | |
1862 | "%s/.debug/[kernel.kallsyms]/%s", | |
3846df2e ACM |
1863 | getenv("HOME"), sbuild_id) == -1) { |
1864 | pr_err("Not enough memory for kallsyms file lookup\n"); | |
dc8d6ab2 | 1865 | return -1; |
3846df2e | 1866 | } |
dc8d6ab2 | 1867 | |
19fc2ded ACM |
1868 | kallsyms_filename = kallsyms_allocated_filename; |
1869 | ||
dc8d6ab2 | 1870 | if (access(kallsyms_filename, F_OK)) { |
3846df2e ACM |
1871 | pr_err("No kallsyms or vmlinux with build-id %s " |
1872 | "was found\n", sbuild_id); | |
9e201442 | 1873 | free(kallsyms_allocated_filename); |
dc8d6ab2 | 1874 | return -1; |
9e201442 | 1875 | } |
dc8d6ab2 ACM |
1876 | } else { |
1877 | /* | |
1878 | * Last resort, if we don't have a build-id and couldn't find | |
1879 | * any vmlinux file, try the running kernel kallsyms table. | |
1880 | */ | |
9e201442 | 1881 | kallsyms_filename = "/proc/kallsyms"; |
9e201442 | 1882 | } |
439d473b | 1883 | |
cc612d81 | 1884 | do_kallsyms: |
9de89fe7 | 1885 | err = dso__load_kallsyms(self, kallsyms_filename, map, filter); |
3846df2e ACM |
1886 | if (err > 0) |
1887 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
dc8d6ab2 | 1888 | free(kallsyms_allocated_filename); |
439d473b ACM |
1889 | |
1890 | if (err > 0) { | |
cc612d81 | 1891 | out_fixup: |
e1c7c6a4 | 1892 | if (kallsyms_filename != NULL) |
dc8d6ab2 | 1893 | dso__set_long_name(self, strdup("[kernel.kallsyms]")); |
6a4694a4 ACM |
1894 | map__fixup_start(map); |
1895 | map__fixup_end(map); | |
439d473b | 1896 | } |
94cb9e38 | 1897 | |
a827c875 ACM |
1898 | return err; |
1899 | } | |
1900 | ||
a1645ce1 ZY |
1901 | static int dso__load_guest_kernel_sym(struct dso *self, struct map *map, |
1902 | symbol_filter_t filter) | |
1903 | { | |
1904 | int err; | |
1905 | const char *kallsyms_filename = NULL; | |
23346f21 | 1906 | struct machine *machine; |
a1645ce1 ZY |
1907 | char path[PATH_MAX]; |
1908 | ||
1909 | if (!map->groups) { | |
1910 | pr_debug("Guest kernel map hasn't the point to groups\n"); | |
1911 | return -1; | |
1912 | } | |
23346f21 | 1913 | machine = map->groups->machine; |
a1645ce1 | 1914 | |
23346f21 | 1915 | if (machine__is_default_guest(machine)) { |
a1645ce1 ZY |
1916 | /* |
1917 | * if the user specified a vmlinux filename, use it and only | |
1918 | * it, reporting errors to the user if it cannot be used. | |
1919 | * Or use file guest_kallsyms inputted by user on commandline | |
1920 | */ | |
1921 | if (symbol_conf.default_guest_vmlinux_name != NULL) { | |
1922 | err = dso__load_vmlinux(self, map, | |
1923 | symbol_conf.default_guest_vmlinux_name, filter); | |
1924 | goto out_try_fixup; | |
1925 | } | |
1926 | ||
1927 | kallsyms_filename = symbol_conf.default_guest_kallsyms; | |
1928 | if (!kallsyms_filename) | |
1929 | return -1; | |
1930 | } else { | |
23346f21 | 1931 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); |
a1645ce1 ZY |
1932 | kallsyms_filename = path; |
1933 | } | |
1934 | ||
1935 | err = dso__load_kallsyms(self, kallsyms_filename, map, filter); | |
1936 | if (err > 0) | |
1937 | pr_debug("Using %s for symbols\n", kallsyms_filename); | |
1938 | ||
1939 | out_try_fixup: | |
1940 | if (err > 0) { | |
1941 | if (kallsyms_filename != NULL) { | |
48ea8f54 | 1942 | machine__mmap_name(machine, path, sizeof(path)); |
23346f21 | 1943 | dso__set_long_name(self, strdup(path)); |
a1645ce1 ZY |
1944 | } |
1945 | map__fixup_start(map); | |
1946 | map__fixup_end(map); | |
1947 | } | |
1948 | ||
1949 | return err; | |
1950 | } | |
cd84c2ac | 1951 | |
b0da954a | 1952 | static void dsos__add(struct list_head *head, struct dso *dso) |
cd84c2ac | 1953 | { |
b0da954a | 1954 | list_add_tail(&dso->node, head); |
cd84c2ac FW |
1955 | } |
1956 | ||
b0da954a | 1957 | static struct dso *dsos__find(struct list_head *head, const char *name) |
cd84c2ac FW |
1958 | { |
1959 | struct dso *pos; | |
1960 | ||
b0da954a | 1961 | list_for_each_entry(pos, head, node) |
cf4e5b08 | 1962 | if (strcmp(pos->long_name, name) == 0) |
cd84c2ac FW |
1963 | return pos; |
1964 | return NULL; | |
1965 | } | |
1966 | ||
a89e5abe | 1967 | struct dso *__dsos__findnew(struct list_head *head, const char *name) |
cd84c2ac | 1968 | { |
a89e5abe | 1969 | struct dso *dso = dsos__find(head, name); |
cd84c2ac | 1970 | |
e4204992 | 1971 | if (!dso) { |
00a192b3 | 1972 | dso = dso__new(name); |
cfc10d3b | 1973 | if (dso != NULL) { |
a89e5abe | 1974 | dsos__add(head, dso); |
cfc10d3b ACM |
1975 | dso__set_basename(dso); |
1976 | } | |
66bd8424 | 1977 | } |
cd84c2ac FW |
1978 | |
1979 | return dso; | |
cd84c2ac FW |
1980 | } |
1981 | ||
1f626bc3 | 1982 | size_t __dsos__fprintf(struct list_head *head, FILE *fp) |
cd84c2ac FW |
1983 | { |
1984 | struct dso *pos; | |
cbf69680 | 1985 | size_t ret = 0; |
cd84c2ac | 1986 | |
95011c60 ACM |
1987 | list_for_each_entry(pos, head, node) { |
1988 | int i; | |
1989 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
cbf69680 | 1990 | ret += dso__fprintf(pos, i, fp); |
95011c60 | 1991 | } |
cbf69680 ACM |
1992 | |
1993 | return ret; | |
cd84c2ac FW |
1994 | } |
1995 | ||
cbf69680 | 1996 | size_t machines__fprintf_dsos(struct rb_root *self, FILE *fp) |
b0da954a | 1997 | { |
a1645ce1 | 1998 | struct rb_node *nd; |
cbf69680 | 1999 | size_t ret = 0; |
a1645ce1 | 2000 | |
cbf69680 | 2001 | for (nd = rb_first(self); nd; nd = rb_next(nd)) { |
23346f21 | 2002 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
cbf69680 ACM |
2003 | ret += __dsos__fprintf(&pos->kernel_dsos, fp); |
2004 | ret += __dsos__fprintf(&pos->user_dsos, fp); | |
a1645ce1 | 2005 | } |
cbf69680 ACM |
2006 | |
2007 | return ret; | |
b0da954a ACM |
2008 | } |
2009 | ||
88d3d9b7 ACM |
2010 | static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp, |
2011 | bool with_hits) | |
9e03eb2d ACM |
2012 | { |
2013 | struct dso *pos; | |
2014 | size_t ret = 0; | |
2015 | ||
b0da954a | 2016 | list_for_each_entry(pos, head, node) { |
88d3d9b7 ACM |
2017 | if (with_hits && !pos->hit) |
2018 | continue; | |
9e03eb2d | 2019 | ret += dso__fprintf_buildid(pos, fp); |
1124ba73 | 2020 | ret += fprintf(fp, " %s\n", pos->long_name); |
9e03eb2d ACM |
2021 | } |
2022 | return ret; | |
2023 | } | |
2024 | ||
f869097e ACM |
2025 | size_t machine__fprintf_dsos_buildid(struct machine *self, FILE *fp, bool with_hits) |
2026 | { | |
2027 | return __dsos__fprintf_buildid(&self->kernel_dsos, fp, with_hits) + | |
2028 | __dsos__fprintf_buildid(&self->user_dsos, fp, with_hits); | |
2029 | } | |
2030 | ||
cbf69680 | 2031 | size_t machines__fprintf_dsos_buildid(struct rb_root *self, FILE *fp, bool with_hits) |
b0da954a | 2032 | { |
a1645ce1 ZY |
2033 | struct rb_node *nd; |
2034 | size_t ret = 0; | |
2035 | ||
cbf69680 | 2036 | for (nd = rb_first(self); nd; nd = rb_next(nd)) { |
23346f21 | 2037 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
f869097e | 2038 | ret += machine__fprintf_dsos_buildid(pos, fp, with_hits); |
a1645ce1 ZY |
2039 | } |
2040 | return ret; | |
b0da954a ACM |
2041 | } |
2042 | ||
fd1d908c ACM |
2043 | struct dso *dso__new_kernel(const char *name) |
2044 | { | |
2045 | struct dso *self = dso__new(name ?: "[kernel.kallsyms]"); | |
2046 | ||
2047 | if (self != NULL) { | |
b63be8d7 | 2048 | dso__set_short_name(self, "[kernel]"); |
a1645ce1 ZY |
2049 | self->kernel = DSO_TYPE_KERNEL; |
2050 | } | |
2051 | ||
2052 | return self; | |
2053 | } | |
2054 | ||
23346f21 | 2055 | static struct dso *dso__new_guest_kernel(struct machine *machine, |
a1645ce1 ZY |
2056 | const char *name) |
2057 | { | |
48ea8f54 ACM |
2058 | char bf[PATH_MAX]; |
2059 | struct dso *self = dso__new(name ?: machine__mmap_name(machine, bf, sizeof(bf))); | |
a1645ce1 | 2060 | |
a1645ce1 ZY |
2061 | if (self != NULL) { |
2062 | dso__set_short_name(self, "[guest.kernel]"); | |
2063 | self->kernel = DSO_TYPE_GUEST_KERNEL; | |
fd1d908c ACM |
2064 | } |
2065 | ||
2066 | return self; | |
2067 | } | |
2068 | ||
23346f21 | 2069 | void dso__read_running_kernel_build_id(struct dso *self, struct machine *machine) |
fd1d908c | 2070 | { |
a1645ce1 ZY |
2071 | char path[PATH_MAX]; |
2072 | ||
23346f21 | 2073 | if (machine__is_default_guest(machine)) |
a1645ce1 | 2074 | return; |
23346f21 | 2075 | sprintf(path, "%s/sys/kernel/notes", machine->root_dir); |
a1645ce1 | 2076 | if (sysfs__read_build_id(path, self->build_id, |
fd1d908c ACM |
2077 | sizeof(self->build_id)) == 0) |
2078 | self->has_build_id = true; | |
2079 | } | |
2080 | ||
5c0541d5 | 2081 | static struct dso *machine__create_kernel(struct machine *self) |
cd84c2ac | 2082 | { |
a1645ce1 ZY |
2083 | const char *vmlinux_name = NULL; |
2084 | struct dso *kernel; | |
cd84c2ac | 2085 | |
5c0541d5 | 2086 | if (machine__is_host(self)) { |
a1645ce1 ZY |
2087 | vmlinux_name = symbol_conf.vmlinux_name; |
2088 | kernel = dso__new_kernel(vmlinux_name); | |
2089 | } else { | |
5c0541d5 | 2090 | if (machine__is_default_guest(self)) |
a1645ce1 | 2091 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; |
5c0541d5 | 2092 | kernel = dso__new_guest_kernel(self, vmlinux_name); |
8d92c02a | 2093 | } |
cd84c2ac | 2094 | |
a1645ce1 | 2095 | if (kernel != NULL) { |
5c0541d5 ACM |
2096 | dso__read_running_kernel_build_id(kernel, self); |
2097 | dsos__add(&self->kernel_dsos, kernel); | |
a1645ce1 | 2098 | } |
f1dfa0b1 | 2099 | return kernel; |
f1dfa0b1 ACM |
2100 | } |
2101 | ||
d28c6223 | 2102 | int __machine__create_kernel_maps(struct machine *self, struct dso *kernel) |
f1dfa0b1 | 2103 | { |
de176489 | 2104 | enum map_type type; |
f1dfa0b1 | 2105 | |
de176489 | 2106 | for (type = 0; type < MAP__NR_TYPES; ++type) { |
9de89fe7 ACM |
2107 | struct kmap *kmap; |
2108 | ||
d28c6223 ACM |
2109 | self->vmlinux_maps[type] = map__new2(0, kernel, type); |
2110 | if (self->vmlinux_maps[type] == NULL) | |
de176489 | 2111 | return -1; |
f1dfa0b1 | 2112 | |
d28c6223 ACM |
2113 | self->vmlinux_maps[type]->map_ip = |
2114 | self->vmlinux_maps[type]->unmap_ip = identity__map_ip; | |
9de89fe7 | 2115 | |
d28c6223 ACM |
2116 | kmap = map__kmap(self->vmlinux_maps[type]); |
2117 | kmap->kmaps = &self->kmaps; | |
2118 | map_groups__insert(&self->kmaps, self->vmlinux_maps[type]); | |
f1dfa0b1 ACM |
2119 | } |
2120 | ||
f1dfa0b1 | 2121 | return 0; |
2446042c ACM |
2122 | } |
2123 | ||
076c6e45 ACM |
2124 | void machine__destroy_kernel_maps(struct machine *self) |
2125 | { | |
2126 | enum map_type type; | |
2127 | ||
2128 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
2129 | struct kmap *kmap; | |
2130 | ||
2131 | if (self->vmlinux_maps[type] == NULL) | |
2132 | continue; | |
2133 | ||
2134 | kmap = map__kmap(self->vmlinux_maps[type]); | |
2135 | map_groups__remove(&self->kmaps, self->vmlinux_maps[type]); | |
2136 | if (kmap->ref_reloc_sym) { | |
2137 | /* | |
2138 | * ref_reloc_sym is shared among all maps, so free just | |
2139 | * on one of them. | |
2140 | */ | |
2141 | if (type == MAP__FUNCTION) { | |
2142 | free((char *)kmap->ref_reloc_sym->name); | |
2143 | kmap->ref_reloc_sym->name = NULL; | |
2144 | free(kmap->ref_reloc_sym); | |
2145 | } | |
2146 | kmap->ref_reloc_sym = NULL; | |
2147 | } | |
2148 | ||
2149 | map__delete(self->vmlinux_maps[type]); | |
2150 | self->vmlinux_maps[type] = NULL; | |
2151 | } | |
2152 | } | |
2153 | ||
5c0541d5 ACM |
2154 | int machine__create_kernel_maps(struct machine *self) |
2155 | { | |
2156 | struct dso *kernel = machine__create_kernel(self); | |
2157 | ||
2158 | if (kernel == NULL || | |
2159 | __machine__create_kernel_maps(self, kernel) < 0) | |
2160 | return -1; | |
2161 | ||
2162 | if (symbol_conf.use_modules && machine__create_modules(self) < 0) | |
2163 | pr_debug("Problems creating module maps, continuing anyway...\n"); | |
2164 | /* | |
2165 | * Now that we have all the maps created, just set the ->end of them: | |
2166 | */ | |
2167 | map_groups__fixup_end(&self->kmaps); | |
2168 | return 0; | |
2169 | } | |
2170 | ||
cc612d81 ACM |
2171 | static void vmlinux_path__exit(void) |
2172 | { | |
2173 | while (--vmlinux_path__nr_entries >= 0) { | |
2174 | free(vmlinux_path[vmlinux_path__nr_entries]); | |
2175 | vmlinux_path[vmlinux_path__nr_entries] = NULL; | |
2176 | } | |
2177 | ||
2178 | free(vmlinux_path); | |
2179 | vmlinux_path = NULL; | |
2180 | } | |
2181 | ||
2182 | static int vmlinux_path__init(void) | |
2183 | { | |
2184 | struct utsname uts; | |
2185 | char bf[PATH_MAX]; | |
2186 | ||
2187 | if (uname(&uts) < 0) | |
2188 | return -1; | |
2189 | ||
2190 | vmlinux_path = malloc(sizeof(char *) * 5); | |
2191 | if (vmlinux_path == NULL) | |
2192 | return -1; | |
2193 | ||
2194 | vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux"); | |
2195 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2196 | goto out_fail; | |
2197 | ++vmlinux_path__nr_entries; | |
2198 | vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux"); | |
2199 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2200 | goto out_fail; | |
2201 | ++vmlinux_path__nr_entries; | |
2202 | snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", uts.release); | |
2203 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2204 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2205 | goto out_fail; | |
2206 | ++vmlinux_path__nr_entries; | |
2207 | snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", uts.release); | |
2208 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2209 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2210 | goto out_fail; | |
2211 | ++vmlinux_path__nr_entries; | |
2212 | snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux", | |
2213 | uts.release); | |
2214 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
2215 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
2216 | goto out_fail; | |
2217 | ++vmlinux_path__nr_entries; | |
2218 | ||
2219 | return 0; | |
2220 | ||
2221 | out_fail: | |
2222 | vmlinux_path__exit(); | |
2223 | return -1; | |
2224 | } | |
2225 | ||
5ad90e4e | 2226 | size_t machine__fprintf_vmlinux_path(struct machine *self, FILE *fp) |
b0a9ab62 ACM |
2227 | { |
2228 | int i; | |
2229 | size_t printed = 0; | |
5ad90e4e ACM |
2230 | struct dso *kdso = self->vmlinux_maps[MAP__FUNCTION]->dso; |
2231 | ||
2232 | if (kdso->has_build_id) { | |
2233 | char filename[PATH_MAX]; | |
2234 | if (dso__build_id_filename(kdso, filename, sizeof(filename))) | |
2235 | printed += fprintf(fp, "[0] %s\n", filename); | |
2236 | } | |
b0a9ab62 ACM |
2237 | |
2238 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
5ad90e4e ACM |
2239 | printed += fprintf(fp, "[%d] %s\n", |
2240 | i + kdso->has_build_id, vmlinux_path[i]); | |
b0a9ab62 ACM |
2241 | |
2242 | return printed; | |
2243 | } | |
2244 | ||
655000e7 ACM |
2245 | static int setup_list(struct strlist **list, const char *list_str, |
2246 | const char *list_name) | |
2247 | { | |
2248 | if (list_str == NULL) | |
2249 | return 0; | |
2250 | ||
2251 | *list = strlist__new(true, list_str); | |
2252 | if (!*list) { | |
2253 | pr_err("problems parsing %s list\n", list_name); | |
2254 | return -1; | |
2255 | } | |
2256 | return 0; | |
2257 | } | |
2258 | ||
75be6cf4 | 2259 | int symbol__init(void) |
2446042c | 2260 | { |
95011c60 | 2261 | elf_version(EV_CURRENT); |
75be6cf4 ACM |
2262 | if (symbol_conf.sort_by_name) |
2263 | symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - | |
2264 | sizeof(struct symbol)); | |
b32d133a | 2265 | |
75be6cf4 | 2266 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init() < 0) |
2446042c ACM |
2267 | return -1; |
2268 | ||
c410a338 ACM |
2269 | if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { |
2270 | pr_err("'.' is the only non valid --field-separator argument\n"); | |
2271 | return -1; | |
2272 | } | |
2273 | ||
655000e7 ACM |
2274 | if (setup_list(&symbol_conf.dso_list, |
2275 | symbol_conf.dso_list_str, "dso") < 0) | |
2276 | return -1; | |
2277 | ||
2278 | if (setup_list(&symbol_conf.comm_list, | |
2279 | symbol_conf.comm_list_str, "comm") < 0) | |
2280 | goto out_free_dso_list; | |
2281 | ||
2282 | if (setup_list(&symbol_conf.sym_list, | |
2283 | symbol_conf.sym_list_str, "symbol") < 0) | |
2284 | goto out_free_comm_list; | |
2285 | ||
4aa65636 | 2286 | return 0; |
655000e7 ACM |
2287 | |
2288 | out_free_dso_list: | |
2289 | strlist__delete(symbol_conf.dso_list); | |
2290 | out_free_comm_list: | |
2291 | strlist__delete(symbol_conf.comm_list); | |
2292 | return -1; | |
4aa65636 ACM |
2293 | } |
2294 | ||
d65a458b ACM |
2295 | void symbol__exit(void) |
2296 | { | |
2297 | strlist__delete(symbol_conf.sym_list); | |
2298 | strlist__delete(symbol_conf.dso_list); | |
2299 | strlist__delete(symbol_conf.comm_list); | |
2300 | vmlinux_path__exit(); | |
2301 | symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL; | |
2302 | } | |
2303 | ||
d28c6223 | 2304 | int machines__create_kernel_maps(struct rb_root *self, pid_t pid) |
4aa65636 | 2305 | { |
d28c6223 | 2306 | struct machine *machine = machines__findnew(self, pid); |
9de89fe7 | 2307 | |
23346f21 | 2308 | if (machine == NULL) |
a1645ce1 | 2309 | return -1; |
cc612d81 | 2310 | |
5c0541d5 | 2311 | return machine__create_kernel_maps(machine); |
cd84c2ac | 2312 | } |
5aab621b ACM |
2313 | |
2314 | static int hex(char ch) | |
2315 | { | |
2316 | if ((ch >= '0') && (ch <= '9')) | |
2317 | return ch - '0'; | |
2318 | if ((ch >= 'a') && (ch <= 'f')) | |
2319 | return ch - 'a' + 10; | |
2320 | if ((ch >= 'A') && (ch <= 'F')) | |
2321 | return ch - 'A' + 10; | |
2322 | return -1; | |
2323 | } | |
2324 | ||
2325 | /* | |
2326 | * While we find nice hex chars, build a long_val. | |
2327 | * Return number of chars processed. | |
2328 | */ | |
2329 | int hex2u64(const char *ptr, u64 *long_val) | |
2330 | { | |
2331 | const char *p = ptr; | |
2332 | *long_val = 0; | |
2333 | ||
2334 | while (*p) { | |
2335 | const int hex_val = hex(*p); | |
2336 | ||
2337 | if (hex_val < 0) | |
2338 | break; | |
2339 | ||
2340 | *long_val = (*long_val << 4) | hex_val; | |
2341 | p++; | |
2342 | } | |
2343 | ||
2344 | return p - ptr; | |
2345 | } | |
2346 | ||
2347 | char *strxfrchar(char *s, char from, char to) | |
2348 | { | |
2349 | char *p = s; | |
2350 | ||
2351 | while ((p = strchr(p, from)) != NULL) | |
2352 | *p++ = to; | |
2353 | ||
2354 | return s; | |
2355 | } | |
a1645ce1 | 2356 | |
d28c6223 | 2357 | int machines__create_guest_kernel_maps(struct rb_root *self) |
a1645ce1 ZY |
2358 | { |
2359 | int ret = 0; | |
2360 | struct dirent **namelist = NULL; | |
2361 | int i, items = 0; | |
2362 | char path[PATH_MAX]; | |
2363 | pid_t pid; | |
2364 | ||
2365 | if (symbol_conf.default_guest_vmlinux_name || | |
2366 | symbol_conf.default_guest_modules || | |
2367 | symbol_conf.default_guest_kallsyms) { | |
d28c6223 | 2368 | machines__create_kernel_maps(self, DEFAULT_GUEST_KERNEL_ID); |
a1645ce1 ZY |
2369 | } |
2370 | ||
2371 | if (symbol_conf.guestmount) { | |
2372 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
2373 | if (items <= 0) | |
2374 | return -ENOENT; | |
2375 | for (i = 0; i < items; i++) { | |
2376 | if (!isdigit(namelist[i]->d_name[0])) { | |
2377 | /* Filter out . and .. */ | |
2378 | continue; | |
2379 | } | |
2380 | pid = atoi(namelist[i]->d_name); | |
2381 | sprintf(path, "%s/%s/proc/kallsyms", | |
2382 | symbol_conf.guestmount, | |
2383 | namelist[i]->d_name); | |
2384 | ret = access(path, R_OK); | |
2385 | if (ret) { | |
2386 | pr_debug("Can't access file %s\n", path); | |
2387 | goto failure; | |
2388 | } | |
d28c6223 | 2389 | machines__create_kernel_maps(self, pid); |
a1645ce1 ZY |
2390 | } |
2391 | failure: | |
2392 | free(namelist); | |
2393 | } | |
2394 | ||
2395 | return ret; | |
2396 | } | |
5c0541d5 | 2397 | |
076c6e45 ACM |
2398 | void machines__destroy_guest_kernel_maps(struct rb_root *self) |
2399 | { | |
2400 | struct rb_node *next = rb_first(self); | |
2401 | ||
2402 | while (next) { | |
2403 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
2404 | ||
2405 | next = rb_next(&pos->rb_node); | |
2406 | rb_erase(&pos->rb_node, self); | |
2407 | machine__delete(pos); | |
2408 | } | |
2409 | } | |
2410 | ||
5c0541d5 ACM |
2411 | int machine__load_kallsyms(struct machine *self, const char *filename, |
2412 | enum map_type type, symbol_filter_t filter) | |
2413 | { | |
2414 | struct map *map = self->vmlinux_maps[type]; | |
2415 | int ret = dso__load_kallsyms(map->dso, filename, map, filter); | |
2416 | ||
2417 | if (ret > 0) { | |
2418 | dso__set_loaded(map->dso, type); | |
2419 | /* | |
2420 | * Since /proc/kallsyms will have multiple sessions for the | |
2421 | * kernel, with modules between them, fixup the end of all | |
2422 | * sections. | |
2423 | */ | |
2424 | __map_groups__fixup_end(&self->kmaps, type); | |
2425 | } | |
2426 | ||
2427 | return ret; | |
2428 | } | |
2429 | ||
2430 | int machine__load_vmlinux_path(struct machine *self, enum map_type type, | |
2431 | symbol_filter_t filter) | |
2432 | { | |
2433 | struct map *map = self->vmlinux_maps[type]; | |
2434 | int ret = dso__load_vmlinux_path(map->dso, map, filter); | |
2435 | ||
2436 | if (ret > 0) { | |
2437 | dso__set_loaded(map->dso, type); | |
2438 | map__reloc_vmlinux(map); | |
2439 | } | |
2440 | ||
2441 | return ret; | |
2442 | } |