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 <inttypes.h>
15#include "build-id.h"
16#include "debug.h"
17#include "symbol.h"
18#include "strlist.h"
19
20#include <libelf.h>
21#include <gelf.h>
22#include <elf.h>
23#include <limits.h>
24#include <sys/utsname.h>
25
26#ifndef KSYM_NAME_LEN
27#define KSYM_NAME_LEN 128
28#endif
29
30#ifndef NT_GNU_BUILD_ID
31#define NT_GNU_BUILD_ID 3
32#endif
33
34static bool dso__build_id_equal(const struct dso *self, u8 *build_id);
35static int elf_read_build_id(Elf *elf, void *bf, size_t size);
36static void dsos__add(struct list_head *head, struct dso *dso);
37static struct map *map__new2(u64 start, struct dso *dso, enum map_type type);
38static int dso__load_kernel_sym(struct dso *self, struct map *map,
39 symbol_filter_t filter);
40static int dso__load_guest_kernel_sym(struct dso *self, struct map *map,
41 symbol_filter_t filter);
42static int vmlinux_path__nr_entries;
43static char **vmlinux_path;
44
45struct symbol_conf symbol_conf = {
46 .exclude_other = true,
47 .use_modules = true,
48 .try_vmlinux_path = true,
49 .symfs = "",
50};
51
52int dso__name_len(const struct dso *self)
53{
54 if (verbose)
55 return self->long_name_len;
56
57 return self->short_name_len;
58}
59
60bool dso__loaded(const struct dso *self, enum map_type type)
61{
62 return self->loaded & (1 << type);
63}
64
65bool dso__sorted_by_name(const struct dso *self, enum map_type type)
66{
67 return self->sorted_by_name & (1 << type);
68}
69
70static void dso__set_sorted_by_name(struct dso *self, enum map_type type)
71{
72 self->sorted_by_name |= (1 << type);
73}
74
75bool symbol_type__is_a(char symbol_type, enum map_type map_type)
76{
77 switch (map_type) {
78 case MAP__FUNCTION:
79 return symbol_type == 'T' || symbol_type == 'W';
80 case MAP__VARIABLE:
81 return symbol_type == 'D' || symbol_type == 'd';
82 default:
83 return false;
84 }
85}
86
87static void symbols__fixup_end(struct rb_root *self)
88{
89 struct rb_node *nd, *prevnd = rb_first(self);
90 struct symbol *curr, *prev;
91
92 if (prevnd == NULL)
93 return;
94
95 curr = rb_entry(prevnd, struct symbol, rb_node);
96
97 for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) {
98 prev = curr;
99 curr = rb_entry(nd, struct symbol, rb_node);
100
101 if (prev->end == prev->start && prev->end != curr->start)
102 prev->end = curr->start - 1;
103 }
104
105
106 if (curr->end == curr->start)
107 curr->end = roundup(curr->start, 4096);
108}
109
110static void __map_groups__fixup_end(struct map_groups *self, enum map_type type)
111{
112 struct map *prev, *curr;
113 struct rb_node *nd, *prevnd = rb_first(&self->maps[type]);
114
115 if (prevnd == NULL)
116 return;
117
118 curr = rb_entry(prevnd, struct map, rb_node);
119
120 for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) {
121 prev = curr;
122 curr = rb_entry(nd, struct map, rb_node);
123 prev->end = curr->start - 1;
124 }
125
126
127
128
129
130 curr->end = ~0ULL;
131}
132
133static void map_groups__fixup_end(struct map_groups *self)
134{
135 int i;
136 for (i = 0; i < MAP__NR_TYPES; ++i)
137 __map_groups__fixup_end(self, i);
138}
139
140static struct symbol *symbol__new(u64 start, u64 len, u8 binding,
141 const char *name)
142{
143 size_t namelen = strlen(name) + 1;
144 struct symbol *self = calloc(1, (symbol_conf.priv_size +
145 sizeof(*self) + namelen));
146 if (self == NULL)
147 return NULL;
148
149 if (symbol_conf.priv_size)
150 self = ((void *)self) + symbol_conf.priv_size;
151
152 self->start = start;
153 self->end = len ? start + len - 1 : start;
154 self->binding = binding;
155 self->namelen = namelen - 1;
156
157 pr_debug4("%s: %s %#" PRIx64 "-%#" PRIx64 "\n", __func__, name, start, self->end);
158
159 memcpy(self->name, name, namelen);
160
161 return self;
162}
163
164void symbol__delete(struct symbol *self)
165{
166 free(((void *)self) - symbol_conf.priv_size);
167}
168
169static size_t symbol__fprintf(struct symbol *self, FILE *fp)
170{
171 return fprintf(fp, " %" PRIx64 "-%" PRIx64 " %c %s\n",
172 self->start, self->end,
173 self->binding == STB_GLOBAL ? 'g' :
174 self->binding == STB_LOCAL ? 'l' : 'w',
175 self->name);
176}
177
178void dso__set_long_name(struct dso *self, char *name)
179{
180 if (name == NULL)
181 return;
182 self->long_name = name;
183 self->long_name_len = strlen(name);
184}
185
186static void dso__set_short_name(struct dso *self, const char *name)
187{
188 if (name == NULL)
189 return;
190 self->short_name = name;
191 self->short_name_len = strlen(name);
192}
193
194static void dso__set_basename(struct dso *self)
195{
196 dso__set_short_name(self, basename(self->long_name));
197}
198
199struct dso *dso__new(const char *name)
200{
201 struct dso *self = calloc(1, sizeof(*self) + strlen(name) + 1);
202
203 if (self != NULL) {
204 int i;
205 strcpy(self->name, name);
206 dso__set_long_name(self, self->name);
207 dso__set_short_name(self, self->name);
208 for (i = 0; i < MAP__NR_TYPES; ++i)
209 self->symbols[i] = self->symbol_names[i] = RB_ROOT;
210 self->slen_calculated = 0;
211 self->origin = DSO__ORIG_NOT_FOUND;
212 self->loaded = 0;
213 self->sorted_by_name = 0;
214 self->has_build_id = 0;
215 self->kernel = DSO_TYPE_USER;
216 INIT_LIST_HEAD(&self->node);
217 }
218
219 return self;
220}
221
222static void symbols__delete(struct rb_root *self)
223{
224 struct symbol *pos;
225 struct rb_node *next = rb_first(self);
226
227 while (next) {
228 pos = rb_entry(next, struct symbol, rb_node);
229 next = rb_next(&pos->rb_node);
230 rb_erase(&pos->rb_node, self);
231 symbol__delete(pos);
232 }
233}
234
235void dso__delete(struct dso *self)
236{
237 int i;
238 for (i = 0; i < MAP__NR_TYPES; ++i)
239 symbols__delete(&self->symbols[i]);
240 if (self->sname_alloc)
241 free((char *)self->short_name);
242 if (self->lname_alloc)
243 free(self->long_name);
244 free(self);
245}
246
247void dso__set_build_id(struct dso *self, void *build_id)
248{
249 memcpy(self->build_id, build_id, sizeof(self->build_id));
250 self->has_build_id = 1;
251}
252
253static void symbols__insert(struct rb_root *self, struct symbol *sym)
254{
255 struct rb_node **p = &self->rb_node;
256 struct rb_node *parent = NULL;
257 const u64 ip = sym->start;
258 struct symbol *s;
259
260 while (*p != NULL) {
261 parent = *p;
262 s = rb_entry(parent, struct symbol, rb_node);
263 if (ip < s->start)
264 p = &(*p)->rb_left;
265 else
266 p = &(*p)->rb_right;
267 }
268 rb_link_node(&sym->rb_node, parent, p);
269 rb_insert_color(&sym->rb_node, self);
270}
271
272static struct symbol *symbols__find(struct rb_root *self, u64 ip)
273{
274 struct rb_node *n;
275
276 if (self == NULL)
277 return NULL;
278
279 n = self->rb_node;
280
281 while (n) {
282 struct symbol *s = rb_entry(n, struct symbol, rb_node);
283
284 if (ip < s->start)
285 n = n->rb_left;
286 else if (ip > s->end)
287 n = n->rb_right;
288 else
289 return s;
290 }
291
292 return NULL;
293}
294
295struct symbol_name_rb_node {
296 struct rb_node rb_node;
297 struct symbol sym;
298};
299
300static void symbols__insert_by_name(struct rb_root *self, struct symbol *sym)
301{
302 struct rb_node **p = &self->rb_node;
303 struct rb_node *parent = NULL;
304 struct symbol_name_rb_node *symn, *s;
305
306 symn = container_of(sym, struct symbol_name_rb_node, sym);
307
308 while (*p != NULL) {
309 parent = *p;
310 s = rb_entry(parent, struct symbol_name_rb_node, rb_node);
311 if (strcmp(sym->name, s->sym.name) < 0)
312 p = &(*p)->rb_left;
313 else
314 p = &(*p)->rb_right;
315 }
316 rb_link_node(&symn->rb_node, parent, p);
317 rb_insert_color(&symn->rb_node, self);
318}
319
320static void symbols__sort_by_name(struct rb_root *self, struct rb_root *source)
321{
322 struct rb_node *nd;
323
324 for (nd = rb_first(source); nd; nd = rb_next(nd)) {
325 struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
326 symbols__insert_by_name(self, pos);
327 }
328}
329
330static struct symbol *symbols__find_by_name(struct rb_root *self, const char *name)
331{
332 struct rb_node *n;
333
334 if (self == NULL)
335 return NULL;
336
337 n = self->rb_node;
338
339 while (n) {
340 struct symbol_name_rb_node *s;
341 int cmp;
342
343 s = rb_entry(n, struct symbol_name_rb_node, rb_node);
344 cmp = strcmp(name, s->sym.name);
345
346 if (cmp < 0)
347 n = n->rb_left;
348 else if (cmp > 0)
349 n = n->rb_right;
350 else
351 return &s->sym;
352 }
353
354 return NULL;
355}
356
357struct symbol *dso__find_symbol(struct dso *self,
358 enum map_type type, u64 addr)
359{
360 return symbols__find(&self->symbols[type], addr);
361}
362
363struct symbol *dso__find_symbol_by_name(struct dso *self, enum map_type type,
364 const char *name)
365{
366 return symbols__find_by_name(&self->symbol_names[type], name);
367}
368
369void dso__sort_by_name(struct dso *self, enum map_type type)
370{
371 dso__set_sorted_by_name(self, type);
372 return symbols__sort_by_name(&self->symbol_names[type],
373 &self->symbols[type]);
374}
375
376int build_id__sprintf(const u8 *self, int len, char *bf)
377{
378 char *bid = bf;
379 const u8 *raw = self;
380 int i;
381
382 for (i = 0; i < len; ++i) {
383 sprintf(bid, "%02x", *raw);
384 ++raw;
385 bid += 2;
386 }
387
388 return raw - self;
389}
390
391size_t dso__fprintf_buildid(struct dso *self, FILE *fp)
392{
393 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
394
395 build_id__sprintf(self->build_id, sizeof(self->build_id), sbuild_id);
396 return fprintf(fp, "%s", sbuild_id);
397}
398
399size_t dso__fprintf_symbols_by_name(struct dso *self, enum map_type type, FILE *fp)
400{
401 size_t ret = 0;
402 struct rb_node *nd;
403 struct symbol_name_rb_node *pos;
404
405 for (nd = rb_first(&self->symbol_names[type]); nd; nd = rb_next(nd)) {
406 pos = rb_entry(nd, struct symbol_name_rb_node, rb_node);
407 fprintf(fp, "%s\n", pos->sym.name);
408 }
409
410 return ret;
411}
412
413size_t dso__fprintf(struct dso *self, enum map_type type, FILE *fp)
414{
415 struct rb_node *nd;
416 size_t ret = fprintf(fp, "dso: %s (", self->short_name);
417
418 if (self->short_name != self->long_name)
419 ret += fprintf(fp, "%s, ", self->long_name);
420 ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type],
421 self->loaded ? "" : "NOT ");
422 ret += dso__fprintf_buildid(self, fp);
423 ret += fprintf(fp, ")\n");
424 for (nd = rb_first(&self->symbols[type]); nd; nd = rb_next(nd)) {
425 struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
426 ret += symbol__fprintf(pos, fp);
427 }
428
429 return ret;
430}
431
432int kallsyms__parse(const char *filename, void *arg,
433 int (*process_symbol)(void *arg, const char *name,
434 char type, u64 start, u64 end))
435{
436 char *line = NULL;
437 size_t n;
438 int err = -1;
439 u64 prev_start = 0;
440 char prev_symbol_type = 0;
441 char *prev_symbol_name;
442 FILE *file = fopen(filename, "r");
443
444 if (file == NULL)
445 goto out_failure;
446
447 prev_symbol_name = malloc(KSYM_NAME_LEN);
448 if (prev_symbol_name == NULL)
449 goto out_close;
450
451 err = 0;
452
453 while (!feof(file)) {
454 u64 start;
455 int line_len, len;
456 char symbol_type;
457 char *symbol_name;
458
459 line_len = getline(&line, &n, file);
460 if (line_len < 0 || !line)
461 break;
462
463 line[--line_len] = '\0';
464
465 len = hex2u64(line, &start);
466
467 len++;
468 if (len + 2 >= line_len)
469 continue;
470
471 symbol_type = toupper(line[len]);
472 len += 2;
473 symbol_name = line + len;
474 len = line_len - len;
475
476 if (len >= KSYM_NAME_LEN) {
477 err = -1;
478 break;
479 }
480
481 if (prev_symbol_type) {
482 u64 end = start;
483 if (end != prev_start)
484 --end;
485 err = process_symbol(arg, prev_symbol_name,
486 prev_symbol_type, prev_start, end);
487 if (err)
488 break;
489 }
490
491 memcpy(prev_symbol_name, symbol_name, len + 1);
492 prev_symbol_type = symbol_type;
493 prev_start = start;
494 }
495
496 free(prev_symbol_name);
497 free(line);
498out_close:
499 fclose(file);
500 return err;
501
502out_failure:
503 return -1;
504}
505
506struct process_kallsyms_args {
507 struct map *map;
508 struct dso *dso;
509};
510
511static u8 kallsyms2elf_type(char type)
512{
513 if (type == 'W')
514 return STB_WEAK;
515
516 return isupper(type) ? STB_GLOBAL : STB_LOCAL;
517}
518
519static int map__process_kallsym_symbol(void *arg, const char *name,
520 char type, u64 start, u64 end)
521{
522 struct symbol *sym;
523 struct process_kallsyms_args *a = arg;
524 struct rb_root *root = &a->dso->symbols[a->map->type];
525
526 if (!symbol_type__is_a(type, a->map->type))
527 return 0;
528
529 sym = symbol__new(start, end - start + 1,
530 kallsyms2elf_type(type), name);
531 if (sym == NULL)
532 return -ENOMEM;
533
534
535
536
537 symbols__insert(root, sym);
538
539 return 0;
540}
541
542
543
544
545
546
547static int dso__load_all_kallsyms(struct dso *self, const char *filename,
548 struct map *map)
549{
550 struct process_kallsyms_args args = { .map = map, .dso = self, };
551 return kallsyms__parse(filename, &args, map__process_kallsym_symbol);
552}
553
554
555
556
557
558
559static int dso__split_kallsyms(struct dso *self, struct map *map,
560 symbol_filter_t filter)
561{
562 struct map_groups *kmaps = map__kmap(map)->kmaps;
563 struct machine *machine = kmaps->machine;
564 struct map *curr_map = map;
565 struct symbol *pos;
566 int count = 0, moved = 0;
567 struct rb_root *root = &self->symbols[map->type];
568 struct rb_node *next = rb_first(root);
569 int kernel_range = 0;
570
571 while (next) {
572 char *module;
573
574 pos = rb_entry(next, struct symbol, rb_node);
575 next = rb_next(&pos->rb_node);
576
577 module = strchr(pos->name, '\t');
578 if (module) {
579 if (!symbol_conf.use_modules)
580 goto discard_symbol;
581
582 *module++ = '\0';
583
584 if (strcmp(curr_map->dso->short_name, module)) {
585 if (curr_map != map &&
586 self->kernel == DSO_TYPE_GUEST_KERNEL &&
587 machine__is_default_guest(machine)) {
588
589
590
591
592
593
594
595 dso__set_loaded(curr_map->dso,
596 curr_map->type);
597 }
598
599 curr_map = map_groups__find_by_name(kmaps,
600 map->type, module);
601 if (curr_map == NULL) {
602 pr_debug("%s/proc/{kallsyms,modules} "
603 "inconsistency while looking "
604 "for \"%s\" module!\n",
605 machine->root_dir, module);
606 curr_map = map;
607 goto discard_symbol;
608 }
609
610 if (curr_map->dso->loaded &&
611 !machine__is_default_guest(machine))
612 goto discard_symbol;
613 }
614
615
616
617
618 pos->start = curr_map->map_ip(curr_map, pos->start);
619 pos->end = curr_map->map_ip(curr_map, pos->end);
620 } else if (curr_map != map) {
621 char dso_name[PATH_MAX];
622 struct dso *dso;
623
624 if (count == 0) {
625 curr_map = map;
626 goto filter_symbol;
627 }
628
629 if (self->kernel == DSO_TYPE_GUEST_KERNEL)
630 snprintf(dso_name, sizeof(dso_name),
631 "[guest.kernel].%d",
632 kernel_range++);
633 else
634 snprintf(dso_name, sizeof(dso_name),
635 "[kernel].%d",
636 kernel_range++);
637
638 dso = dso__new(dso_name);
639 if (dso == NULL)
640 return -1;
641
642 dso->kernel = self->kernel;
643
644 curr_map = map__new2(pos->start, dso, map->type);
645 if (curr_map == NULL) {
646 dso__delete(dso);
647 return -1;
648 }
649
650 curr_map->map_ip = curr_map->unmap_ip = identity__map_ip;
651 map_groups__insert(kmaps, curr_map);
652 ++kernel_range;
653 }
654filter_symbol:
655 if (filter && filter(curr_map, pos)) {
656discard_symbol: rb_erase(&pos->rb_node, root);
657 symbol__delete(pos);
658 } else {
659 if (curr_map != map) {
660 rb_erase(&pos->rb_node, root);
661 symbols__insert(&curr_map->dso->symbols[curr_map->type], pos);
662 ++moved;
663 } else
664 ++count;
665 }
666 }
667
668 if (curr_map != map &&
669 self->kernel == DSO_TYPE_GUEST_KERNEL &&
670 machine__is_default_guest(kmaps->machine)) {
671 dso__set_loaded(curr_map->dso, curr_map->type);
672 }
673
674 return count + moved;
675}
676
677int dso__load_kallsyms(struct dso *self, const char *filename,
678 struct map *map, symbol_filter_t filter)
679{
680 if (dso__load_all_kallsyms(self, filename, map) < 0)
681 return -1;
682
683 if (self->kernel == DSO_TYPE_GUEST_KERNEL)
684 self->origin = DSO__ORIG_GUEST_KERNEL;
685 else
686 self->origin = DSO__ORIG_KERNEL;
687
688 return dso__split_kallsyms(self, map, filter);
689}
690
691static int dso__load_perf_map(struct dso *self, struct map *map,
692 symbol_filter_t filter)
693{
694 char *line = NULL;
695 size_t n;
696 FILE *file;
697 int nr_syms = 0;
698
699 file = fopen(self->long_name, "r");
700 if (file == NULL)
701 goto out_failure;
702
703 while (!feof(file)) {
704 u64 start, size;
705 struct symbol *sym;
706 int line_len, len;
707
708 line_len = getline(&line, &n, file);
709 if (line_len < 0)
710 break;
711
712 if (!line)
713 goto out_failure;
714
715 line[--line_len] = '\0';
716
717 len = hex2u64(line, &start);
718
719 len++;
720 if (len + 2 >= line_len)
721 continue;
722
723 len += hex2u64(line + len, &size);
724
725 len++;
726 if (len + 2 >= line_len)
727 continue;
728
729 sym = symbol__new(start, size, STB_GLOBAL, line + len);
730
731 if (sym == NULL)
732 goto out_delete_line;
733
734 if (filter && filter(map, sym))
735 symbol__delete(sym);
736 else {
737 symbols__insert(&self->symbols[map->type], sym);
738 nr_syms++;
739 }
740 }
741
742 free(line);
743 fclose(file);
744
745 return nr_syms;
746
747out_delete_line:
748 free(line);
749out_failure:
750 return -1;
751}
752
753
754
755
756
757
758
759
760#define elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) \
761 for (idx = 0, gelf_getsym(syms, idx, &sym);\
762 idx < nr_syms; \
763 idx++, gelf_getsym(syms, idx, &sym))
764
765static inline uint8_t elf_sym__type(const GElf_Sym *sym)
766{
767 return GELF_ST_TYPE(sym->st_info);
768}
769
770static inline int elf_sym__is_function(const GElf_Sym *sym)
771{
772 return elf_sym__type(sym) == STT_FUNC &&
773 sym->st_name != 0 &&
774 sym->st_shndx != SHN_UNDEF;
775}
776
777static inline bool elf_sym__is_object(const GElf_Sym *sym)
778{
779 return elf_sym__type(sym) == STT_OBJECT &&
780 sym->st_name != 0 &&
781 sym->st_shndx != SHN_UNDEF;
782}
783
784static inline int elf_sym__is_label(const GElf_Sym *sym)
785{
786 return elf_sym__type(sym) == STT_NOTYPE &&
787 sym->st_name != 0 &&
788 sym->st_shndx != SHN_UNDEF &&
789 sym->st_shndx != SHN_ABS;
790}
791
792static inline const char *elf_sec__name(const GElf_Shdr *shdr,
793 const Elf_Data *secstrs)
794{
795 return secstrs->d_buf + shdr->sh_name;
796}
797
798static inline int elf_sec__is_text(const GElf_Shdr *shdr,
799 const Elf_Data *secstrs)
800{
801 return strstr(elf_sec__name(shdr, secstrs), "text") != NULL;
802}
803
804static inline bool elf_sec__is_data(const GElf_Shdr *shdr,
805 const Elf_Data *secstrs)
806{
807 return strstr(elf_sec__name(shdr, secstrs), "data") != NULL;
808}
809
810static inline const char *elf_sym__name(const GElf_Sym *sym,
811 const Elf_Data *symstrs)
812{
813 return symstrs->d_buf + sym->st_name;
814}
815
816static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
817 GElf_Shdr *shp, const char *name,
818 size_t *idx)
819{
820 Elf_Scn *sec = NULL;
821 size_t cnt = 1;
822
823 while ((sec = elf_nextscn(elf, sec)) != NULL) {
824 char *str;
825
826 gelf_getshdr(sec, shp);
827 str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name);
828 if (!strcmp(name, str)) {
829 if (idx)
830 *idx = cnt;
831 break;
832 }
833 ++cnt;
834 }
835
836 return sec;
837}
838
839#define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \
840 for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \
841 idx < nr_entries; \
842 ++idx, pos = gelf_getrel(reldata, idx, &pos_mem))
843
844#define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \
845 for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \
846 idx < nr_entries; \
847 ++idx, pos = gelf_getrela(reldata, idx, &pos_mem))
848
849
850
851
852
853
854
855
856static int dso__synthesize_plt_symbols(struct dso *self, struct map *map,
857 symbol_filter_t filter)
858{
859 uint32_t nr_rel_entries, idx;
860 GElf_Sym sym;
861 u64 plt_offset;
862 GElf_Shdr shdr_plt;
863 struct symbol *f;
864 GElf_Shdr shdr_rel_plt, shdr_dynsym;
865 Elf_Data *reldata, *syms, *symstrs;
866 Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym;
867 size_t dynsym_idx;
868 GElf_Ehdr ehdr;
869 char sympltname[1024];
870 Elf *elf;
871 int nr = 0, symidx, fd, err = 0;
872 char name[PATH_MAX];
873
874 snprintf(name, sizeof(name), "%s%s",
875 symbol_conf.symfs, self->long_name);
876 fd = open(name, O_RDONLY);
877 if (fd < 0)
878 goto out;
879
880 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
881 if (elf == NULL)
882 goto out_close;
883
884 if (gelf_getehdr(elf, &ehdr) == NULL)
885 goto out_elf_end;
886
887 scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym,
888 ".dynsym", &dynsym_idx);
889 if (scn_dynsym == NULL)
890 goto out_elf_end;
891
892 scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,
893 ".rela.plt", NULL);
894 if (scn_plt_rel == NULL) {
895 scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,
896 ".rel.plt", NULL);
897 if (scn_plt_rel == NULL)
898 goto out_elf_end;
899 }
900
901 err = -1;
902
903 if (shdr_rel_plt.sh_link != dynsym_idx)
904 goto out_elf_end;
905
906 if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL)
907 goto out_elf_end;
908
909
910
911
912
913 reldata = elf_getdata(scn_plt_rel, NULL);
914 if (reldata == NULL)
915 goto out_elf_end;
916
917 syms = elf_getdata(scn_dynsym, NULL);
918 if (syms == NULL)
919 goto out_elf_end;
920
921 scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link);
922 if (scn_symstrs == NULL)
923 goto out_elf_end;
924
925 symstrs = elf_getdata(scn_symstrs, NULL);
926 if (symstrs == NULL)
927 goto out_elf_end;
928
929 nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize;
930 plt_offset = shdr_plt.sh_offset;
931
932 if (shdr_rel_plt.sh_type == SHT_RELA) {
933 GElf_Rela pos_mem, *pos;
934
935 elf_section__for_each_rela(reldata, pos, pos_mem, idx,
936 nr_rel_entries) {
937 symidx = GELF_R_SYM(pos->r_info);
938 plt_offset += shdr_plt.sh_entsize;
939 gelf_getsym(syms, symidx, &sym);
940 snprintf(sympltname, sizeof(sympltname),
941 "%s@plt", elf_sym__name(&sym, symstrs));
942
943 f = symbol__new(plt_offset, shdr_plt.sh_entsize,
944 STB_GLOBAL, sympltname);
945 if (!f)
946 goto out_elf_end;
947
948 if (filter && filter(map, f))
949 symbol__delete(f);
950 else {
951 symbols__insert(&self->symbols[map->type], f);
952 ++nr;
953 }
954 }
955 } else if (shdr_rel_plt.sh_type == SHT_REL) {
956 GElf_Rel pos_mem, *pos;
957 elf_section__for_each_rel(reldata, pos, pos_mem, idx,
958 nr_rel_entries) {
959 symidx = GELF_R_SYM(pos->r_info);
960 plt_offset += shdr_plt.sh_entsize;
961 gelf_getsym(syms, symidx, &sym);
962 snprintf(sympltname, sizeof(sympltname),
963 "%s@plt", elf_sym__name(&sym, symstrs));
964
965 f = symbol__new(plt_offset, shdr_plt.sh_entsize,
966 STB_GLOBAL, sympltname);
967 if (!f)
968 goto out_elf_end;
969
970 if (filter && filter(map, f))
971 symbol__delete(f);
972 else {
973 symbols__insert(&self->symbols[map->type], f);
974 ++nr;
975 }
976 }
977 }
978
979 err = 0;
980out_elf_end:
981 elf_end(elf);
982out_close:
983 close(fd);
984
985 if (err == 0)
986 return nr;
987out:
988 pr_debug("%s: problems reading %s PLT info.\n",
989 __func__, self->long_name);
990 return 0;
991}
992
993static bool elf_sym__is_a(GElf_Sym *self, enum map_type type)
994{
995 switch (type) {
996 case MAP__FUNCTION:
997 return elf_sym__is_function(self);
998 case MAP__VARIABLE:
999 return elf_sym__is_object(self);
1000 default:
1001 return false;
1002 }
1003}
1004
1005static bool elf_sec__is_a(GElf_Shdr *self, Elf_Data *secstrs, enum map_type type)
1006{
1007 switch (type) {
1008 case MAP__FUNCTION:
1009 return elf_sec__is_text(self, secstrs);
1010 case MAP__VARIABLE:
1011 return elf_sec__is_data(self, secstrs);
1012 default:
1013 return false;
1014 }
1015}
1016
1017static size_t elf_addr_to_index(Elf *elf, GElf_Addr addr)
1018{
1019 Elf_Scn *sec = NULL;
1020 GElf_Shdr shdr;
1021 size_t cnt = 1;
1022
1023 while ((sec = elf_nextscn(elf, sec)) != NULL) {
1024 gelf_getshdr(sec, &shdr);
1025
1026 if ((addr >= shdr.sh_addr) &&
1027 (addr < (shdr.sh_addr + shdr.sh_size)))
1028 return cnt;
1029
1030 ++cnt;
1031 }
1032
1033 return -1;
1034}
1035
1036static int dso__load_sym(struct dso *self, struct map *map, const char *name,
1037 int fd, symbol_filter_t filter, int kmodule,
1038 int want_symtab)
1039{
1040 struct kmap *kmap = self->kernel ? map__kmap(map) : NULL;
1041 struct map *curr_map = map;
1042 struct dso *curr_dso = self;
1043 Elf_Data *symstrs, *secstrs;
1044 uint32_t nr_syms;
1045 int err = -1;
1046 uint32_t idx;
1047 GElf_Ehdr ehdr;
1048 GElf_Shdr shdr, opdshdr;
1049 Elf_Data *syms, *opddata = NULL;
1050 GElf_Sym sym;
1051 Elf_Scn *sec, *sec_strndx, *opdsec;
1052 Elf *elf;
1053 int nr = 0;
1054 size_t opdidx = 0;
1055
1056 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
1057 if (elf == NULL) {
1058 pr_debug("%s: cannot read %s ELF file.\n", __func__, name);
1059 goto out_close;
1060 }
1061
1062 if (gelf_getehdr(elf, &ehdr) == NULL) {
1063 pr_debug("%s: cannot get elf header.\n", __func__);
1064 goto out_elf_end;
1065 }
1066
1067
1068 if (self->has_build_id) {
1069 u8 build_id[BUILD_ID_SIZE];
1070
1071 if (elf_read_build_id(elf, build_id,
1072 BUILD_ID_SIZE) != BUILD_ID_SIZE)
1073 goto out_elf_end;
1074
1075 if (!dso__build_id_equal(self, build_id))
1076 goto out_elf_end;
1077 }
1078
1079 sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL);
1080 if (sec == NULL) {
1081 if (want_symtab)
1082 goto out_elf_end;
1083
1084 sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL);
1085 if (sec == NULL)
1086 goto out_elf_end;
1087 }
1088
1089 opdsec = elf_section_by_name(elf, &ehdr, &opdshdr, ".opd", &opdidx);
1090 if (opdsec)
1091 opddata = elf_rawdata(opdsec, NULL);
1092
1093 syms = elf_getdata(sec, NULL);
1094 if (syms == NULL)
1095 goto out_elf_end;
1096
1097 sec = elf_getscn(elf, shdr.sh_link);
1098 if (sec == NULL)
1099 goto out_elf_end;
1100
1101 symstrs = elf_getdata(sec, NULL);
1102 if (symstrs == NULL)
1103 goto out_elf_end;
1104
1105 sec_strndx = elf_getscn(elf, ehdr.e_shstrndx);
1106 if (sec_strndx == NULL)
1107 goto out_elf_end;
1108
1109 secstrs = elf_getdata(sec_strndx, NULL);
1110 if (secstrs == NULL)
1111 goto out_elf_end;
1112
1113 nr_syms = shdr.sh_size / shdr.sh_entsize;
1114
1115 memset(&sym, 0, sizeof(sym));
1116 if (self->kernel == DSO_TYPE_USER) {
1117 self->adjust_symbols = (ehdr.e_type == ET_EXEC ||
1118 elf_section_by_name(elf, &ehdr, &shdr,
1119 ".gnu.prelink_undo",
1120 NULL) != NULL);
1121 } else self->adjust_symbols = 0;
1122
1123 elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) {
1124 struct symbol *f;
1125 const char *elf_name = elf_sym__name(&sym, symstrs);
1126 char *demangled = NULL;
1127 int is_label = elf_sym__is_label(&sym);
1128 const char *section_name;
1129
1130 if (kmap && kmap->ref_reloc_sym && kmap->ref_reloc_sym->name &&
1131 strcmp(elf_name, kmap->ref_reloc_sym->name) == 0)
1132 kmap->ref_reloc_sym->unrelocated_addr = sym.st_value;
1133
1134 if (!is_label && !elf_sym__is_a(&sym, map->type))
1135 continue;
1136
1137
1138
1139
1140 if (ehdr.e_machine == EM_ARM) {
1141 if (!strcmp(elf_name, "$a") ||
1142 !strcmp(elf_name, "$d") ||
1143 !strcmp(elf_name, "$t"))
1144 continue;
1145 }
1146
1147 if (opdsec && sym.st_shndx == opdidx) {
1148 u32 offset = sym.st_value - opdshdr.sh_addr;
1149 u64 *opd = opddata->d_buf + offset;
1150 sym.st_value = *opd;
1151 sym.st_shndx = elf_addr_to_index(elf, sym.st_value);
1152 }
1153
1154 sec = elf_getscn(elf, sym.st_shndx);
1155 if (!sec)
1156 goto out_elf_end;
1157
1158 gelf_getshdr(sec, &shdr);
1159
1160 if (is_label && !elf_sec__is_a(&shdr, secstrs, map->type))
1161 continue;
1162
1163 section_name = elf_sec__name(&shdr, secstrs);
1164
1165
1166
1167 if ((ehdr.e_machine == EM_ARM) &&
1168 (map->type == MAP__FUNCTION) &&
1169 (sym.st_value & 1))
1170 --sym.st_value;
1171
1172 if (self->kernel != DSO_TYPE_USER || kmodule) {
1173 char dso_name[PATH_MAX];
1174
1175 if (strcmp(section_name,
1176 (curr_dso->short_name +
1177 self->short_name_len)) == 0)
1178 goto new_symbol;
1179
1180 if (strcmp(section_name, ".text") == 0) {
1181 curr_map = map;
1182 curr_dso = self;
1183 goto new_symbol;
1184 }
1185
1186 snprintf(dso_name, sizeof(dso_name),
1187 "%s%s", self->short_name, section_name);
1188
1189 curr_map = map_groups__find_by_name(kmap->kmaps, map->type, dso_name);
1190 if (curr_map == NULL) {
1191 u64 start = sym.st_value;
1192
1193 if (kmodule)
1194 start += map->start + shdr.sh_offset;
1195
1196 curr_dso = dso__new(dso_name);
1197 if (curr_dso == NULL)
1198 goto out_elf_end;
1199 curr_dso->kernel = self->kernel;
1200 curr_map = map__new2(start, curr_dso,
1201 map->type);
1202 if (curr_map == NULL) {
1203 dso__delete(curr_dso);
1204 goto out_elf_end;
1205 }
1206 curr_map->map_ip = identity__map_ip;
1207 curr_map->unmap_ip = identity__map_ip;
1208 curr_dso->origin = self->origin;
1209 map_groups__insert(kmap->kmaps, curr_map);
1210 dsos__add(&self->node, curr_dso);
1211 dso__set_loaded(curr_dso, map->type);
1212 } else
1213 curr_dso = curr_map->dso;
1214
1215 goto new_symbol;
1216 }
1217
1218 if (curr_dso->adjust_symbols) {
1219 pr_debug4("%s: adjusting symbol: st_value: %#" PRIx64 " "
1220 "sh_addr: %#" PRIx64 " sh_offset: %#" PRIx64 "\n", __func__,
1221 (u64)sym.st_value, (u64)shdr.sh_addr,
1222 (u64)shdr.sh_offset);
1223 sym.st_value -= shdr.sh_addr - shdr.sh_offset;
1224 }
1225
1226
1227
1228
1229
1230 demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI);
1231 if (demangled != NULL)
1232 elf_name = demangled;
1233new_symbol:
1234 f = symbol__new(sym.st_value, sym.st_size,
1235 GELF_ST_BIND(sym.st_info), elf_name);
1236 free(demangled);
1237 if (!f)
1238 goto out_elf_end;
1239
1240 if (filter && filter(curr_map, f))
1241 symbol__delete(f);
1242 else {
1243 symbols__insert(&curr_dso->symbols[curr_map->type], f);
1244 nr++;
1245 }
1246 }
1247
1248
1249
1250
1251 if (nr > 0) {
1252 symbols__fixup_end(&self->symbols[map->type]);
1253 if (kmap) {
1254
1255
1256
1257
1258 __map_groups__fixup_end(kmap->kmaps, map->type);
1259 }
1260 }
1261 err = nr;
1262out_elf_end:
1263 elf_end(elf);
1264out_close:
1265 return err;
1266}
1267
1268static bool dso__build_id_equal(const struct dso *self, u8 *build_id)
1269{
1270 return memcmp(self->build_id, build_id, sizeof(self->build_id)) == 0;
1271}
1272
1273bool __dsos__read_build_ids(struct list_head *head, bool with_hits)
1274{
1275 bool have_build_id = false;
1276 struct dso *pos;
1277
1278 list_for_each_entry(pos, head, node) {
1279 if (with_hits && !pos->hit)
1280 continue;
1281 if (pos->has_build_id) {
1282 have_build_id = true;
1283 continue;
1284 }
1285 if (filename__read_build_id(pos->long_name, pos->build_id,
1286 sizeof(pos->build_id)) > 0) {
1287 have_build_id = true;
1288 pos->has_build_id = true;
1289 }
1290 }
1291
1292 return have_build_id;
1293}
1294
1295
1296
1297
1298#define NOTE_ALIGN(n) (((n) + 3) & -4U)
1299
1300static int elf_read_build_id(Elf *elf, void *bf, size_t size)
1301{
1302 int err = -1;
1303 GElf_Ehdr ehdr;
1304 GElf_Shdr shdr;
1305 Elf_Data *data;
1306 Elf_Scn *sec;
1307 Elf_Kind ek;
1308 void *ptr;
1309
1310 if (size < BUILD_ID_SIZE)
1311 goto out;
1312
1313 ek = elf_kind(elf);
1314 if (ek != ELF_K_ELF)
1315 goto out;
1316
1317 if (gelf_getehdr(elf, &ehdr) == NULL) {
1318 pr_err("%s: cannot get elf header.\n", __func__);
1319 goto out;
1320 }
1321
1322 sec = elf_section_by_name(elf, &ehdr, &shdr,
1323 ".note.gnu.build-id", NULL);
1324 if (sec == NULL) {
1325 sec = elf_section_by_name(elf, &ehdr, &shdr,
1326 ".notes", NULL);
1327 if (sec == NULL)
1328 goto out;
1329 }
1330
1331 data = elf_getdata(sec, NULL);
1332 if (data == NULL)
1333 goto out;
1334
1335 ptr = data->d_buf;
1336 while (ptr < (data->d_buf + data->d_size)) {
1337 GElf_Nhdr *nhdr = ptr;
1338 int namesz = NOTE_ALIGN(nhdr->n_namesz),
1339 descsz = NOTE_ALIGN(nhdr->n_descsz);
1340 const char *name;
1341
1342 ptr += sizeof(*nhdr);
1343 name = ptr;
1344 ptr += namesz;
1345 if (nhdr->n_type == NT_GNU_BUILD_ID &&
1346 nhdr->n_namesz == sizeof("GNU")) {
1347 if (memcmp(name, "GNU", sizeof("GNU")) == 0) {
1348 memcpy(bf, ptr, BUILD_ID_SIZE);
1349 err = BUILD_ID_SIZE;
1350 break;
1351 }
1352 }
1353 ptr += descsz;
1354 }
1355
1356out:
1357 return err;
1358}
1359
1360int filename__read_build_id(const char *filename, void *bf, size_t size)
1361{
1362 int fd, err = -1;
1363 Elf *elf;
1364
1365 if (size < BUILD_ID_SIZE)
1366 goto out;
1367
1368 fd = open(filename, O_RDONLY);
1369 if (fd < 0)
1370 goto out;
1371
1372 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
1373 if (elf == NULL) {
1374 pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename);
1375 goto out_close;
1376 }
1377
1378 err = elf_read_build_id(elf, bf, size);
1379
1380 elf_end(elf);
1381out_close:
1382 close(fd);
1383out:
1384 return err;
1385}
1386
1387int sysfs__read_build_id(const char *filename, void *build_id, size_t size)
1388{
1389 int fd, err = -1;
1390
1391 if (size < BUILD_ID_SIZE)
1392 goto out;
1393
1394 fd = open(filename, O_RDONLY);
1395 if (fd < 0)
1396 goto out;
1397
1398 while (1) {
1399 char bf[BUFSIZ];
1400 GElf_Nhdr nhdr;
1401 int namesz, descsz;
1402
1403 if (read(fd, &nhdr, sizeof(nhdr)) != sizeof(nhdr))
1404 break;
1405
1406 namesz = NOTE_ALIGN(nhdr.n_namesz);
1407 descsz = NOTE_ALIGN(nhdr.n_descsz);
1408 if (nhdr.n_type == NT_GNU_BUILD_ID &&
1409 nhdr.n_namesz == sizeof("GNU")) {
1410 if (read(fd, bf, namesz) != namesz)
1411 break;
1412 if (memcmp(bf, "GNU", sizeof("GNU")) == 0) {
1413 if (read(fd, build_id,
1414 BUILD_ID_SIZE) == BUILD_ID_SIZE) {
1415 err = 0;
1416 break;
1417 }
1418 } else if (read(fd, bf, descsz) != descsz)
1419 break;
1420 } else {
1421 int n = namesz + descsz;
1422 if (read(fd, bf, n) != n)
1423 break;
1424 }
1425 }
1426 close(fd);
1427out:
1428 return err;
1429}
1430
1431char dso__symtab_origin(const struct dso *self)
1432{
1433 static const char origin[] = {
1434 [DSO__ORIG_KERNEL] = 'k',
1435 [DSO__ORIG_JAVA_JIT] = 'j',
1436 [DSO__ORIG_BUILD_ID_CACHE] = 'B',
1437 [DSO__ORIG_FEDORA] = 'f',
1438 [DSO__ORIG_UBUNTU] = 'u',
1439 [DSO__ORIG_BUILDID] = 'b',
1440 [DSO__ORIG_DSO] = 'd',
1441 [DSO__ORIG_KMODULE] = 'K',
1442 [DSO__ORIG_GUEST_KERNEL] = 'g',
1443 [DSO__ORIG_GUEST_KMODULE] = 'G',
1444 };
1445
1446 if (self == NULL || self->origin == DSO__ORIG_NOT_FOUND)
1447 return '!';
1448 return origin[self->origin];
1449}
1450
1451int dso__load(struct dso *self, struct map *map, symbol_filter_t filter)
1452{
1453 int size = PATH_MAX;
1454 char *name;
1455 int ret = -1;
1456 int fd;
1457 struct machine *machine;
1458 const char *root_dir;
1459 int want_symtab;
1460
1461 dso__set_loaded(self, map->type);
1462
1463 if (self->kernel == DSO_TYPE_KERNEL)
1464 return dso__load_kernel_sym(self, map, filter);
1465 else if (self->kernel == DSO_TYPE_GUEST_KERNEL)
1466 return dso__load_guest_kernel_sym(self, map, filter);
1467
1468 if (map->groups && map->groups->machine)
1469 machine = map->groups->machine;
1470 else
1471 machine = NULL;
1472
1473 name = malloc(size);
1474 if (!name)
1475 return -1;
1476
1477 self->adjust_symbols = 0;
1478
1479 if (strncmp(self->name, "/tmp/perf-", 10) == 0) {
1480 ret = dso__load_perf_map(self, map, filter);
1481 self->origin = ret > 0 ? DSO__ORIG_JAVA_JIT :
1482 DSO__ORIG_NOT_FOUND;
1483 return ret;
1484 }
1485
1486
1487
1488
1489
1490 for (self->origin = DSO__ORIG_BUILD_ID_CACHE, want_symtab = 1;
1491 self->origin != DSO__ORIG_NOT_FOUND;
1492 self->origin++) {
1493 switch (self->origin) {
1494 case DSO__ORIG_BUILD_ID_CACHE:
1495
1496 if (symbol_conf.symfs[0] ||
1497 (dso__build_id_filename(self, name, size) == NULL)) {
1498 continue;
1499 }
1500 break;
1501 case DSO__ORIG_FEDORA:
1502 snprintf(name, size, "%s/usr/lib/debug%s.debug",
1503 symbol_conf.symfs, self->long_name);
1504 break;
1505 case DSO__ORIG_UBUNTU:
1506 snprintf(name, size, "%s/usr/lib/debug%s",
1507 symbol_conf.symfs, self->long_name);
1508 break;
1509 case DSO__ORIG_BUILDID: {
1510 char build_id_hex[BUILD_ID_SIZE * 2 + 1];
1511
1512 if (!self->has_build_id)
1513 continue;
1514
1515 build_id__sprintf(self->build_id,
1516 sizeof(self->build_id),
1517 build_id_hex);
1518 snprintf(name, size,
1519 "%s/usr/lib/debug/.build-id/%.2s/%s.debug",
1520 symbol_conf.symfs, build_id_hex, build_id_hex + 2);
1521 }
1522 break;
1523 case DSO__ORIG_DSO:
1524 snprintf(name, size, "%s%s",
1525 symbol_conf.symfs, self->long_name);
1526 break;
1527 case DSO__ORIG_GUEST_KMODULE:
1528 if (map->groups && map->groups->machine)
1529 root_dir = map->groups->machine->root_dir;
1530 else
1531 root_dir = "";
1532 snprintf(name, size, "%s%s%s", symbol_conf.symfs,
1533 root_dir, self->long_name);
1534 break;
1535
1536 case DSO__ORIG_KMODULE:
1537 snprintf(name, size, "%s%s", symbol_conf.symfs,
1538 self->long_name);
1539 break;
1540
1541 default:
1542
1543
1544
1545
1546 if (want_symtab) {
1547 want_symtab = 0;
1548 self->origin = DSO__ORIG_BUILD_ID_CACHE;
1549 } else
1550 continue;
1551 }
1552
1553
1554 fd = open(name, O_RDONLY);
1555 if (fd < 0)
1556 continue;
1557
1558 ret = dso__load_sym(self, map, name, fd, filter, 0,
1559 want_symtab);
1560 close(fd);
1561
1562
1563
1564
1565
1566 if (!ret)
1567 continue;
1568
1569 if (ret > 0) {
1570 int nr_plt = dso__synthesize_plt_symbols(self, map, filter);
1571 if (nr_plt > 0)
1572 ret += nr_plt;
1573 break;
1574 }
1575 }
1576
1577 free(name);
1578 if (ret < 0 && strstr(self->name, " (deleted)") != NULL)
1579 return 0;
1580 return ret;
1581}
1582
1583struct map *map_groups__find_by_name(struct map_groups *self,
1584 enum map_type type, const char *name)
1585{
1586 struct rb_node *nd;
1587
1588 for (nd = rb_first(&self->maps[type]); nd; nd = rb_next(nd)) {
1589 struct map *map = rb_entry(nd, struct map, rb_node);
1590
1591 if (map->dso && strcmp(map->dso->short_name, name) == 0)
1592 return map;
1593 }
1594
1595 return NULL;
1596}
1597
1598static int dso__kernel_module_get_build_id(struct dso *self,
1599 const char *root_dir)
1600{
1601 char filename[PATH_MAX];
1602
1603
1604
1605
1606 const char *name = self->short_name + 1;
1607
1608 snprintf(filename, sizeof(filename),
1609 "%s/sys/module/%.*s/notes/.note.gnu.build-id",
1610 root_dir, (int)strlen(name) - 1, name);
1611
1612 if (sysfs__read_build_id(filename, self->build_id,
1613 sizeof(self->build_id)) == 0)
1614 self->has_build_id = true;
1615
1616 return 0;
1617}
1618
1619static int map_groups__set_modules_path_dir(struct map_groups *self,
1620 const char *dir_name)
1621{
1622 struct dirent *dent;
1623 DIR *dir = opendir(dir_name);
1624 int ret = 0;
1625
1626 if (!dir) {
1627 pr_debug("%s: cannot open %s dir\n", __func__, dir_name);
1628 return -1;
1629 }
1630
1631 while ((dent = readdir(dir)) != NULL) {
1632 char path[PATH_MAX];
1633 struct stat st;
1634
1635
1636 sprintf(path, "%s/%s", dir_name, dent->d_name);
1637 if (stat(path, &st))
1638 continue;
1639
1640 if (S_ISDIR(st.st_mode)) {
1641 if (!strcmp(dent->d_name, ".") ||
1642 !strcmp(dent->d_name, ".."))
1643 continue;
1644
1645 snprintf(path, sizeof(path), "%s/%s",
1646 dir_name, dent->d_name);
1647 ret = map_groups__set_modules_path_dir(self, path);
1648 if (ret < 0)
1649 goto out;
1650 } else {
1651 char *dot = strrchr(dent->d_name, '.'),
1652 dso_name[PATH_MAX];
1653 struct map *map;
1654 char *long_name;
1655
1656 if (dot == NULL || strcmp(dot, ".ko"))
1657 continue;
1658 snprintf(dso_name, sizeof(dso_name), "[%.*s]",
1659 (int)(dot - dent->d_name), dent->d_name);
1660
1661 strxfrchar(dso_name, '-', '_');
1662 map = map_groups__find_by_name(self, MAP__FUNCTION, dso_name);
1663 if (map == NULL)
1664 continue;
1665
1666 snprintf(path, sizeof(path), "%s/%s",
1667 dir_name, dent->d_name);
1668
1669 long_name = strdup(path);
1670 if (long_name == NULL) {
1671 ret = -1;
1672 goto out;
1673 }
1674 dso__set_long_name(map->dso, long_name);
1675 map->dso->lname_alloc = 1;
1676 dso__kernel_module_get_build_id(map->dso, "");
1677 }
1678 }
1679
1680out:
1681 closedir(dir);
1682 return ret;
1683}
1684
1685static char *get_kernel_version(const char *root_dir)
1686{
1687 char version[PATH_MAX];
1688 FILE *file;
1689 char *name, *tmp;
1690 const char *prefix = "Linux version ";
1691
1692 sprintf(version, "%s/proc/version", root_dir);
1693 file = fopen(version, "r");
1694 if (!file)
1695 return NULL;
1696
1697 version[0] = '\0';
1698 tmp = fgets(version, sizeof(version), file);
1699 fclose(file);
1700
1701 name = strstr(version, prefix);
1702 if (!name)
1703 return NULL;
1704 name += strlen(prefix);
1705 tmp = strchr(name, ' ');
1706 if (tmp)
1707 *tmp = '\0';
1708
1709 return strdup(name);
1710}
1711
1712static int machine__set_modules_path(struct machine *self)
1713{
1714 char *version;
1715 char modules_path[PATH_MAX];
1716
1717 version = get_kernel_version(self->root_dir);
1718 if (!version)
1719 return -1;
1720
1721 snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s/kernel",
1722 self->root_dir, version);
1723 free(version);
1724
1725 return map_groups__set_modules_path_dir(&self->kmaps, modules_path);
1726}
1727
1728
1729
1730
1731
1732
1733static struct map *map__new2(u64 start, struct dso *dso, enum map_type type)
1734{
1735 struct map *self = calloc(1, (sizeof(*self) +
1736 (dso->kernel ? sizeof(struct kmap) : 0)));
1737 if (self != NULL) {
1738
1739
1740
1741 map__init(self, type, start, 0, 0, dso);
1742 }
1743
1744 return self;
1745}
1746
1747struct map *machine__new_module(struct machine *self, u64 start,
1748 const char *filename)
1749{
1750 struct map *map;
1751 struct dso *dso = __dsos__findnew(&self->kernel_dsos, filename);
1752
1753 if (dso == NULL)
1754 return NULL;
1755
1756 map = map__new2(start, dso, MAP__FUNCTION);
1757 if (map == NULL)
1758 return NULL;
1759
1760 if (machine__is_host(self))
1761 dso->origin = DSO__ORIG_KMODULE;
1762 else
1763 dso->origin = DSO__ORIG_GUEST_KMODULE;
1764 map_groups__insert(&self->kmaps, map);
1765 return map;
1766}
1767
1768static int machine__create_modules(struct machine *self)
1769{
1770 char *line = NULL;
1771 size_t n;
1772 FILE *file;
1773 struct map *map;
1774 const char *modules;
1775 char path[PATH_MAX];
1776
1777 if (machine__is_default_guest(self))
1778 modules = symbol_conf.default_guest_modules;
1779 else {
1780 sprintf(path, "%s/proc/modules", self->root_dir);
1781 modules = path;
1782 }
1783
1784 file = fopen(modules, "r");
1785 if (file == NULL)
1786 return -1;
1787
1788 while (!feof(file)) {
1789 char name[PATH_MAX];
1790 u64 start;
1791 char *sep;
1792 int line_len;
1793
1794 line_len = getline(&line, &n, file);
1795 if (line_len < 0)
1796 break;
1797
1798 if (!line)
1799 goto out_failure;
1800
1801 line[--line_len] = '\0';
1802
1803 sep = strrchr(line, 'x');
1804 if (sep == NULL)
1805 continue;
1806
1807 hex2u64(sep + 1, &start);
1808
1809 sep = strchr(line, ' ');
1810 if (sep == NULL)
1811 continue;
1812
1813 *sep = '\0';
1814
1815 snprintf(name, sizeof(name), "[%s]", line);
1816 map = machine__new_module(self, start, name);
1817 if (map == NULL)
1818 goto out_delete_line;
1819 dso__kernel_module_get_build_id(map->dso, self->root_dir);
1820 }
1821
1822 free(line);
1823 fclose(file);
1824
1825 return machine__set_modules_path(self);
1826
1827out_delete_line:
1828 free(line);
1829out_failure:
1830 return -1;
1831}
1832
1833int dso__load_vmlinux(struct dso *self, struct map *map,
1834 const char *vmlinux, symbol_filter_t filter)
1835{
1836 int err = -1, fd;
1837 char symfs_vmlinux[PATH_MAX];
1838
1839 snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s%s",
1840 symbol_conf.symfs, vmlinux);
1841 fd = open(symfs_vmlinux, O_RDONLY);
1842 if (fd < 0)
1843 return -1;
1844
1845 dso__set_loaded(self, map->type);
1846 err = dso__load_sym(self, map, symfs_vmlinux, fd, filter, 0, 0);
1847 close(fd);
1848
1849 if (err > 0)
1850 pr_debug("Using %s for symbols\n", symfs_vmlinux);
1851
1852 return err;
1853}
1854
1855int dso__load_vmlinux_path(struct dso *self, struct map *map,
1856 symbol_filter_t filter)
1857{
1858 int i, err = 0;
1859 char *filename;
1860
1861 pr_debug("Looking at the vmlinux_path (%d entries long)\n",
1862 vmlinux_path__nr_entries + 1);
1863
1864 filename = dso__build_id_filename(self, NULL, 0);
1865 if (filename != NULL) {
1866 err = dso__load_vmlinux(self, map, filename, filter);
1867 if (err > 0) {
1868 dso__set_long_name(self, filename);
1869 goto out;
1870 }
1871 free(filename);
1872 }
1873
1874 for (i = 0; i < vmlinux_path__nr_entries; ++i) {
1875 err = dso__load_vmlinux(self, map, vmlinux_path[i], filter);
1876 if (err > 0) {
1877 dso__set_long_name(self, strdup(vmlinux_path[i]));
1878 break;
1879 }
1880 }
1881out:
1882 return err;
1883}
1884
1885static int dso__load_kernel_sym(struct dso *self, struct map *map,
1886 symbol_filter_t filter)
1887{
1888 int err;
1889 const char *kallsyms_filename = NULL;
1890 char *kallsyms_allocated_filename = NULL;
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906 if (symbol_conf.kallsyms_name != NULL) {
1907 kallsyms_filename = symbol_conf.kallsyms_name;
1908 goto do_kallsyms;
1909 }
1910
1911 if (symbol_conf.vmlinux_name != NULL) {
1912 err = dso__load_vmlinux(self, map,
1913 symbol_conf.vmlinux_name, filter);
1914 if (err > 0) {
1915 dso__set_long_name(self,
1916 strdup(symbol_conf.vmlinux_name));
1917 goto out_fixup;
1918 }
1919 return err;
1920 }
1921
1922 if (vmlinux_path != NULL) {
1923 err = dso__load_vmlinux_path(self, map, filter);
1924 if (err > 0)
1925 goto out_fixup;
1926 }
1927
1928
1929 if (symbol_conf.symfs[0] != 0)
1930 return -1;
1931
1932
1933
1934
1935
1936
1937 if (self->has_build_id) {
1938 u8 kallsyms_build_id[BUILD_ID_SIZE];
1939 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
1940
1941 if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id,
1942 sizeof(kallsyms_build_id)) == 0) {
1943 if (dso__build_id_equal(self, kallsyms_build_id)) {
1944 kallsyms_filename = "/proc/kallsyms";
1945 goto do_kallsyms;
1946 }
1947 }
1948
1949
1950
1951
1952 build_id__sprintf(self->build_id, sizeof(self->build_id),
1953 sbuild_id);
1954
1955 if (asprintf(&kallsyms_allocated_filename,
1956 "%s/.debug/[kernel.kallsyms]/%s",
1957 getenv("HOME"), sbuild_id) == -1) {
1958 pr_err("Not enough memory for kallsyms file lookup\n");
1959 return -1;
1960 }
1961
1962 kallsyms_filename = kallsyms_allocated_filename;
1963
1964 if (access(kallsyms_filename, F_OK)) {
1965 pr_err("No kallsyms or vmlinux with build-id %s "
1966 "was found\n", sbuild_id);
1967 free(kallsyms_allocated_filename);
1968 return -1;
1969 }
1970 } else {
1971
1972
1973
1974
1975 kallsyms_filename = "/proc/kallsyms";
1976 }
1977
1978do_kallsyms:
1979 err = dso__load_kallsyms(self, kallsyms_filename, map, filter);
1980 if (err > 0)
1981 pr_debug("Using %s for symbols\n", kallsyms_filename);
1982 free(kallsyms_allocated_filename);
1983
1984 if (err > 0) {
1985out_fixup:
1986 if (kallsyms_filename != NULL)
1987 dso__set_long_name(self, strdup("[kernel.kallsyms]"));
1988 map__fixup_start(map);
1989 map__fixup_end(map);
1990 }
1991
1992 return err;
1993}
1994
1995static int dso__load_guest_kernel_sym(struct dso *self, struct map *map,
1996 symbol_filter_t filter)
1997{
1998 int err;
1999 const char *kallsyms_filename = NULL;
2000 struct machine *machine;
2001 char path[PATH_MAX];
2002
2003 if (!map->groups) {
2004 pr_debug("Guest kernel map hasn't the point to groups\n");
2005 return -1;
2006 }
2007 machine = map->groups->machine;
2008
2009 if (machine__is_default_guest(machine)) {
2010
2011
2012
2013
2014
2015 if (symbol_conf.default_guest_vmlinux_name != NULL) {
2016 err = dso__load_vmlinux(self, map,
2017 symbol_conf.default_guest_vmlinux_name, filter);
2018 goto out_try_fixup;
2019 }
2020
2021 kallsyms_filename = symbol_conf.default_guest_kallsyms;
2022 if (!kallsyms_filename)
2023 return -1;
2024 } else {
2025 sprintf(path, "%s/proc/kallsyms", machine->root_dir);
2026 kallsyms_filename = path;
2027 }
2028
2029 err = dso__load_kallsyms(self, kallsyms_filename, map, filter);
2030 if (err > 0)
2031 pr_debug("Using %s for symbols\n", kallsyms_filename);
2032
2033out_try_fixup:
2034 if (err > 0) {
2035 if (kallsyms_filename != NULL) {
2036 machine__mmap_name(machine, path, sizeof(path));
2037 dso__set_long_name(self, strdup(path));
2038 }
2039 map__fixup_start(map);
2040 map__fixup_end(map);
2041 }
2042
2043 return err;
2044}
2045
2046static void dsos__add(struct list_head *head, struct dso *dso)
2047{
2048 list_add_tail(&dso->node, head);
2049}
2050
2051static struct dso *dsos__find(struct list_head *head, const char *name)
2052{
2053 struct dso *pos;
2054
2055 list_for_each_entry(pos, head, node)
2056 if (strcmp(pos->long_name, name) == 0)
2057 return pos;
2058 return NULL;
2059}
2060
2061struct dso *__dsos__findnew(struct list_head *head, const char *name)
2062{
2063 struct dso *dso = dsos__find(head, name);
2064
2065 if (!dso) {
2066 dso = dso__new(name);
2067 if (dso != NULL) {
2068 dsos__add(head, dso);
2069 dso__set_basename(dso);
2070 }
2071 }
2072
2073 return dso;
2074}
2075
2076size_t __dsos__fprintf(struct list_head *head, FILE *fp)
2077{
2078 struct dso *pos;
2079 size_t ret = 0;
2080
2081 list_for_each_entry(pos, head, node) {
2082 int i;
2083 for (i = 0; i < MAP__NR_TYPES; ++i)
2084 ret += dso__fprintf(pos, i, fp);
2085 }
2086
2087 return ret;
2088}
2089
2090size_t machines__fprintf_dsos(struct rb_root *self, FILE *fp)
2091{
2092 struct rb_node *nd;
2093 size_t ret = 0;
2094
2095 for (nd = rb_first(self); nd; nd = rb_next(nd)) {
2096 struct machine *pos = rb_entry(nd, struct machine, rb_node);
2097 ret += __dsos__fprintf(&pos->kernel_dsos, fp);
2098 ret += __dsos__fprintf(&pos->user_dsos, fp);
2099 }
2100
2101 return ret;
2102}
2103
2104static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp,
2105 bool with_hits)
2106{
2107 struct dso *pos;
2108 size_t ret = 0;
2109
2110 list_for_each_entry(pos, head, node) {
2111 if (with_hits && !pos->hit)
2112 continue;
2113 ret += dso__fprintf_buildid(pos, fp);
2114 ret += fprintf(fp, " %s\n", pos->long_name);
2115 }
2116 return ret;
2117}
2118
2119size_t machine__fprintf_dsos_buildid(struct machine *self, FILE *fp, bool with_hits)
2120{
2121 return __dsos__fprintf_buildid(&self->kernel_dsos, fp, with_hits) +
2122 __dsos__fprintf_buildid(&self->user_dsos, fp, with_hits);
2123}
2124
2125size_t machines__fprintf_dsos_buildid(struct rb_root *self, FILE *fp, bool with_hits)
2126{
2127 struct rb_node *nd;
2128 size_t ret = 0;
2129
2130 for (nd = rb_first(self); nd; nd = rb_next(nd)) {
2131 struct machine *pos = rb_entry(nd, struct machine, rb_node);
2132 ret += machine__fprintf_dsos_buildid(pos, fp, with_hits);
2133 }
2134 return ret;
2135}
2136
2137struct dso *dso__new_kernel(const char *name)
2138{
2139 struct dso *self = dso__new(name ?: "[kernel.kallsyms]");
2140
2141 if (self != NULL) {
2142 dso__set_short_name(self, "[kernel]");
2143 self->kernel = DSO_TYPE_KERNEL;
2144 }
2145
2146 return self;
2147}
2148
2149static struct dso *dso__new_guest_kernel(struct machine *machine,
2150 const char *name)
2151{
2152 char bf[PATH_MAX];
2153 struct dso *self = dso__new(name ?: machine__mmap_name(machine, bf, sizeof(bf)));
2154
2155 if (self != NULL) {
2156 dso__set_short_name(self, "[guest.kernel]");
2157 self->kernel = DSO_TYPE_GUEST_KERNEL;
2158 }
2159
2160 return self;
2161}
2162
2163void dso__read_running_kernel_build_id(struct dso *self, struct machine *machine)
2164{
2165 char path[PATH_MAX];
2166
2167 if (machine__is_default_guest(machine))
2168 return;
2169 sprintf(path, "%s/sys/kernel/notes", machine->root_dir);
2170 if (sysfs__read_build_id(path, self->build_id,
2171 sizeof(self->build_id)) == 0)
2172 self->has_build_id = true;
2173}
2174
2175static struct dso *machine__create_kernel(struct machine *self)
2176{
2177 const char *vmlinux_name = NULL;
2178 struct dso *kernel;
2179
2180 if (machine__is_host(self)) {
2181 vmlinux_name = symbol_conf.vmlinux_name;
2182 kernel = dso__new_kernel(vmlinux_name);
2183 } else {
2184 if (machine__is_default_guest(self))
2185 vmlinux_name = symbol_conf.default_guest_vmlinux_name;
2186 kernel = dso__new_guest_kernel(self, vmlinux_name);
2187 }
2188
2189 if (kernel != NULL) {
2190 dso__read_running_kernel_build_id(kernel, self);
2191 dsos__add(&self->kernel_dsos, kernel);
2192 }
2193 return kernel;
2194}
2195
2196struct process_args {
2197 u64 start;
2198};
2199
2200static int symbol__in_kernel(void *arg, const char *name,
2201 char type __used, u64 start, u64 end __used)
2202{
2203 struct process_args *args = arg;
2204
2205 if (strchr(name, '['))
2206 return 0;
2207
2208 args->start = start;
2209 return 1;
2210}
2211
2212
2213static u64 machine__get_kernel_start_addr(struct machine *machine)
2214{
2215 const char *filename;
2216 char path[PATH_MAX];
2217 struct process_args args;
2218
2219 if (machine__is_host(machine)) {
2220 filename = "/proc/kallsyms";
2221 } else {
2222 if (machine__is_default_guest(machine))
2223 filename = (char *)symbol_conf.default_guest_kallsyms;
2224 else {
2225 sprintf(path, "%s/proc/kallsyms", machine->root_dir);
2226 filename = path;
2227 }
2228 }
2229
2230 if (kallsyms__parse(filename, &args, symbol__in_kernel) <= 0)
2231 return 0;
2232
2233 return args.start;
2234}
2235
2236int __machine__create_kernel_maps(struct machine *self, struct dso *kernel)
2237{
2238 enum map_type type;
2239 u64 start = machine__get_kernel_start_addr(self);
2240
2241 for (type = 0; type < MAP__NR_TYPES; ++type) {
2242 struct kmap *kmap;
2243
2244 self->vmlinux_maps[type] = map__new2(start, kernel, type);
2245 if (self->vmlinux_maps[type] == NULL)
2246 return -1;
2247
2248 self->vmlinux_maps[type]->map_ip =
2249 self->vmlinux_maps[type]->unmap_ip = identity__map_ip;
2250
2251 kmap = map__kmap(self->vmlinux_maps[type]);
2252 kmap->kmaps = &self->kmaps;
2253 map_groups__insert(&self->kmaps, self->vmlinux_maps[type]);
2254 }
2255
2256 return 0;
2257}
2258
2259void machine__destroy_kernel_maps(struct machine *self)
2260{
2261 enum map_type type;
2262
2263 for (type = 0; type < MAP__NR_TYPES; ++type) {
2264 struct kmap *kmap;
2265
2266 if (self->vmlinux_maps[type] == NULL)
2267 continue;
2268
2269 kmap = map__kmap(self->vmlinux_maps[type]);
2270 map_groups__remove(&self->kmaps, self->vmlinux_maps[type]);
2271 if (kmap->ref_reloc_sym) {
2272
2273
2274
2275
2276 if (type == MAP__FUNCTION) {
2277 free((char *)kmap->ref_reloc_sym->name);
2278 kmap->ref_reloc_sym->name = NULL;
2279 free(kmap->ref_reloc_sym);
2280 }
2281 kmap->ref_reloc_sym = NULL;
2282 }
2283
2284 map__delete(self->vmlinux_maps[type]);
2285 self->vmlinux_maps[type] = NULL;
2286 }
2287}
2288
2289int machine__create_kernel_maps(struct machine *self)
2290{
2291 struct dso *kernel = machine__create_kernel(self);
2292
2293 if (kernel == NULL ||
2294 __machine__create_kernel_maps(self, kernel) < 0)
2295 return -1;
2296
2297 if (symbol_conf.use_modules && machine__create_modules(self) < 0)
2298 pr_debug("Problems creating module maps, continuing anyway...\n");
2299
2300
2301
2302 map_groups__fixup_end(&self->kmaps);
2303 return 0;
2304}
2305
2306static void vmlinux_path__exit(void)
2307{
2308 while (--vmlinux_path__nr_entries >= 0) {
2309 free(vmlinux_path[vmlinux_path__nr_entries]);
2310 vmlinux_path[vmlinux_path__nr_entries] = NULL;
2311 }
2312
2313 free(vmlinux_path);
2314 vmlinux_path = NULL;
2315}
2316
2317static int vmlinux_path__init(void)
2318{
2319 struct utsname uts;
2320 char bf[PATH_MAX];
2321
2322 vmlinux_path = malloc(sizeof(char *) * 5);
2323 if (vmlinux_path == NULL)
2324 return -1;
2325
2326 vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux");
2327 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2328 goto out_fail;
2329 ++vmlinux_path__nr_entries;
2330 vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux");
2331 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2332 goto out_fail;
2333 ++vmlinux_path__nr_entries;
2334
2335
2336 if (symbol_conf.symfs[0] != 0)
2337 return 0;
2338
2339 if (uname(&uts) < 0)
2340 return -1;
2341
2342 snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", uts.release);
2343 vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
2344 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2345 goto out_fail;
2346 ++vmlinux_path__nr_entries;
2347 snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", uts.release);
2348 vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
2349 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2350 goto out_fail;
2351 ++vmlinux_path__nr_entries;
2352 snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux",
2353 uts.release);
2354 vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
2355 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2356 goto out_fail;
2357 ++vmlinux_path__nr_entries;
2358
2359 return 0;
2360
2361out_fail:
2362 vmlinux_path__exit();
2363 return -1;
2364}
2365
2366size_t machine__fprintf_vmlinux_path(struct machine *self, FILE *fp)
2367{
2368 int i;
2369 size_t printed = 0;
2370 struct dso *kdso = self->vmlinux_maps[MAP__FUNCTION]->dso;
2371
2372 if (kdso->has_build_id) {
2373 char filename[PATH_MAX];
2374 if (dso__build_id_filename(kdso, filename, sizeof(filename)))
2375 printed += fprintf(fp, "[0] %s\n", filename);
2376 }
2377
2378 for (i = 0; i < vmlinux_path__nr_entries; ++i)
2379 printed += fprintf(fp, "[%d] %s\n",
2380 i + kdso->has_build_id, vmlinux_path[i]);
2381
2382 return printed;
2383}
2384
2385static int setup_list(struct strlist **list, const char *list_str,
2386 const char *list_name)
2387{
2388 if (list_str == NULL)
2389 return 0;
2390
2391 *list = strlist__new(true, list_str);
2392 if (!*list) {
2393 pr_err("problems parsing %s list\n", list_name);
2394 return -1;
2395 }
2396 return 0;
2397}
2398
2399int symbol__init(void)
2400{
2401 const char *symfs;
2402
2403 if (symbol_conf.initialized)
2404 return 0;
2405
2406 elf_version(EV_CURRENT);
2407 if (symbol_conf.sort_by_name)
2408 symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) -
2409 sizeof(struct symbol));
2410
2411 if (symbol_conf.try_vmlinux_path && vmlinux_path__init() < 0)
2412 return -1;
2413
2414 if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') {
2415 pr_err("'.' is the only non valid --field-separator argument\n");
2416 return -1;
2417 }
2418
2419 if (setup_list(&symbol_conf.dso_list,
2420 symbol_conf.dso_list_str, "dso") < 0)
2421 return -1;
2422
2423 if (setup_list(&symbol_conf.comm_list,
2424 symbol_conf.comm_list_str, "comm") < 0)
2425 goto out_free_dso_list;
2426
2427 if (setup_list(&symbol_conf.sym_list,
2428 symbol_conf.sym_list_str, "symbol") < 0)
2429 goto out_free_comm_list;
2430
2431
2432
2433
2434
2435 symfs = realpath(symbol_conf.symfs, NULL);
2436 if (symfs == NULL)
2437 symfs = symbol_conf.symfs;
2438 if (strcmp(symfs, "/") == 0)
2439 symbol_conf.symfs = "";
2440 if (symfs != symbol_conf.symfs)
2441 free((void *)symfs);
2442
2443 symbol_conf.initialized = true;
2444 return 0;
2445
2446out_free_dso_list:
2447 strlist__delete(symbol_conf.dso_list);
2448out_free_comm_list:
2449 strlist__delete(symbol_conf.comm_list);
2450 return -1;
2451}
2452
2453void symbol__exit(void)
2454{
2455 if (!symbol_conf.initialized)
2456 return;
2457 strlist__delete(symbol_conf.sym_list);
2458 strlist__delete(symbol_conf.dso_list);
2459 strlist__delete(symbol_conf.comm_list);
2460 vmlinux_path__exit();
2461 symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL;
2462 symbol_conf.initialized = false;
2463}
2464
2465int machines__create_kernel_maps(struct rb_root *self, pid_t pid)
2466{
2467 struct machine *machine = machines__findnew(self, pid);
2468
2469 if (machine == NULL)
2470 return -1;
2471
2472 return machine__create_kernel_maps(machine);
2473}
2474
2475static int hex(char ch)
2476{
2477 if ((ch >= '0') && (ch <= '9'))
2478 return ch - '0';
2479 if ((ch >= 'a') && (ch <= 'f'))
2480 return ch - 'a' + 10;
2481 if ((ch >= 'A') && (ch <= 'F'))
2482 return ch - 'A' + 10;
2483 return -1;
2484}
2485
2486
2487
2488
2489
2490int hex2u64(const char *ptr, u64 *long_val)
2491{
2492 const char *p = ptr;
2493 *long_val = 0;
2494
2495 while (*p) {
2496 const int hex_val = hex(*p);
2497
2498 if (hex_val < 0)
2499 break;
2500
2501 *long_val = (*long_val << 4) | hex_val;
2502 p++;
2503 }
2504
2505 return p - ptr;
2506}
2507
2508char *strxfrchar(char *s, char from, char to)
2509{
2510 char *p = s;
2511
2512 while ((p = strchr(p, from)) != NULL)
2513 *p++ = to;
2514
2515 return s;
2516}
2517
2518int machines__create_guest_kernel_maps(struct rb_root *self)
2519{
2520 int ret = 0;
2521 struct dirent **namelist = NULL;
2522 int i, items = 0;
2523 char path[PATH_MAX];
2524 pid_t pid;
2525
2526 if (symbol_conf.default_guest_vmlinux_name ||
2527 symbol_conf.default_guest_modules ||
2528 symbol_conf.default_guest_kallsyms) {
2529 machines__create_kernel_maps(self, DEFAULT_GUEST_KERNEL_ID);
2530 }
2531
2532 if (symbol_conf.guestmount) {
2533 items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL);
2534 if (items <= 0)
2535 return -ENOENT;
2536 for (i = 0; i < items; i++) {
2537 if (!isdigit(namelist[i]->d_name[0])) {
2538
2539 continue;
2540 }
2541 pid = atoi(namelist[i]->d_name);
2542 sprintf(path, "%s/%s/proc/kallsyms",
2543 symbol_conf.guestmount,
2544 namelist[i]->d_name);
2545 ret = access(path, R_OK);
2546 if (ret) {
2547 pr_debug("Can't access file %s\n", path);
2548 goto failure;
2549 }
2550 machines__create_kernel_maps(self, pid);
2551 }
2552failure:
2553 free(namelist);
2554 }
2555
2556 return ret;
2557}
2558
2559void machines__destroy_guest_kernel_maps(struct rb_root *self)
2560{
2561 struct rb_node *next = rb_first(self);
2562
2563 while (next) {
2564 struct machine *pos = rb_entry(next, struct machine, rb_node);
2565
2566 next = rb_next(&pos->rb_node);
2567 rb_erase(&pos->rb_node, self);
2568 machine__delete(pos);
2569 }
2570}
2571
2572int machine__load_kallsyms(struct machine *self, const char *filename,
2573 enum map_type type, symbol_filter_t filter)
2574{
2575 struct map *map = self->vmlinux_maps[type];
2576 int ret = dso__load_kallsyms(map->dso, filename, map, filter);
2577
2578 if (ret > 0) {
2579 dso__set_loaded(map->dso, type);
2580
2581
2582
2583
2584
2585 __map_groups__fixup_end(&self->kmaps, type);
2586 }
2587
2588 return ret;
2589}
2590
2591int machine__load_vmlinux_path(struct machine *self, enum map_type type,
2592 symbol_filter_t filter)
2593{
2594 struct map *map = self->vmlinux_maps[type];
2595 int ret = dso__load_vmlinux_path(map->dso, map, filter);
2596
2597 if (ret > 0) {
2598 dso__set_loaded(map->dso, type);
2599 map__reloc_vmlinux(map);
2600 }
2601
2602 return ret;
2603}
2604