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