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