11 #include <sys/param.h>
22 #include <sys/utsname.h>
24 #ifndef NT_GNU_BUILD_ID
25 #define NT_GNU_BUILD_ID 3
28 static void dsos__add(struct list_head *head, struct dso *dso);
29 static struct map *map__new2(u64 start, struct dso *dso, enum map_type type);
30 static int dso__load_kernel_sym(struct dso *self, struct map *map,
31 symbol_filter_t filter);
32 static int dso__load_guest_kernel_sym(struct dso *self, struct map *map,
33 symbol_filter_t filter);
34 static int vmlinux_path__nr_entries;
35 static char **vmlinux_path;
37 struct symbol_conf symbol_conf = {
38 .exclude_other = true,
40 .try_vmlinux_path = true,
43 bool dso__loaded(const struct dso *self, enum map_type type)
45 return self->loaded & (1 << type);
48 bool dso__sorted_by_name(const struct dso *self, enum map_type type)
50 return self->sorted_by_name & (1 << type);
53 static void dso__set_sorted_by_name(struct dso *self, enum map_type type)
55 self->sorted_by_name |= (1 << type);
58 bool symbol_type__is_a(char symbol_type, enum map_type map_type)
62 return symbol_type == 'T' || symbol_type == 'W';
64 return symbol_type == 'D' || symbol_type == 'd';
70 static void symbols__fixup_end(struct rb_root *self)
72 struct rb_node *nd, *prevnd = rb_first(self);
73 struct symbol *curr, *prev;
78 curr = rb_entry(prevnd, struct symbol, rb_node);
80 for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) {
82 curr = rb_entry(nd, struct symbol, rb_node);
84 if (prev->end == prev->start)
85 prev->end = curr->start - 1;
89 if (curr->end == curr->start)
90 curr->end = roundup(curr->start, 4096);
93 static void __map_groups__fixup_end(struct map_groups *self, enum map_type type)
95 struct map *prev, *curr;
96 struct rb_node *nd, *prevnd = rb_first(&self->maps[type]);
101 curr = rb_entry(prevnd, struct map, rb_node);
103 for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) {
105 curr = rb_entry(nd, struct map, rb_node);
106 prev->end = curr->start - 1;
110 * We still haven't the actual symbols, so guess the
111 * last map final address.
116 static void map_groups__fixup_end(struct map_groups *self)
119 for (i = 0; i < MAP__NR_TYPES; ++i)
120 __map_groups__fixup_end(self, i);
123 static struct symbol *symbol__new(u64 start, u64 len, const char *name)
125 size_t namelen = strlen(name) + 1;
126 struct symbol *self = calloc(1, (symbol_conf.priv_size +
127 sizeof(*self) + namelen));
131 if (symbol_conf.priv_size)
132 self = ((void *)self) + symbol_conf.priv_size;
135 self->end = len ? start + len - 1 : start;
136 self->namelen = namelen - 1;
138 pr_debug4("%s: %s %#Lx-%#Lx\n", __func__, name, start, self->end);
140 memcpy(self->name, name, namelen);
145 void symbol__delete(struct symbol *self)
147 free(((void *)self) - symbol_conf.priv_size);
150 static size_t symbol__fprintf(struct symbol *self, FILE *fp)
152 return fprintf(fp, " %llx-%llx %s\n",
153 self->start, self->end, self->name);
156 void dso__set_long_name(struct dso *self, char *name)
160 self->long_name = name;
161 self->long_name_len = strlen(name);
164 static void dso__set_short_name(struct dso *self, const char *name)
168 self->short_name = name;
169 self->short_name_len = strlen(name);
172 static void dso__set_basename(struct dso *self)
174 dso__set_short_name(self, basename(self->long_name));
177 struct dso *dso__new(const char *name)
179 struct dso *self = calloc(1, sizeof(*self) + strlen(name) + 1);
183 strcpy(self->name, name);
184 dso__set_long_name(self, self->name);
185 dso__set_short_name(self, self->name);
186 for (i = 0; i < MAP__NR_TYPES; ++i)
187 self->symbols[i] = self->symbol_names[i] = RB_ROOT;
188 self->slen_calculated = 0;
189 self->origin = DSO__ORIG_NOT_FOUND;
191 self->sorted_by_name = 0;
192 self->has_build_id = 0;
193 self->kernel = DSO_TYPE_USER;
194 INIT_LIST_HEAD(&self->node);
200 static void symbols__delete(struct rb_root *self)
203 struct rb_node *next = rb_first(self);
206 pos = rb_entry(next, struct symbol, rb_node);
207 next = rb_next(&pos->rb_node);
208 rb_erase(&pos->rb_node, self);
213 void dso__delete(struct dso *self)
216 for (i = 0; i < MAP__NR_TYPES; ++i)
217 symbols__delete(&self->symbols[i]);
218 if (self->long_name != self->name)
219 free(self->long_name);
223 void dso__set_build_id(struct dso *self, void *build_id)
225 memcpy(self->build_id, build_id, sizeof(self->build_id));
226 self->has_build_id = 1;
229 static void symbols__insert(struct rb_root *self, struct symbol *sym)
231 struct rb_node **p = &self->rb_node;
232 struct rb_node *parent = NULL;
233 const u64 ip = sym->start;
238 s = rb_entry(parent, struct symbol, rb_node);
244 rb_link_node(&sym->rb_node, parent, p);
245 rb_insert_color(&sym->rb_node, self);
248 static struct symbol *symbols__find(struct rb_root *self, u64 ip)
258 struct symbol *s = rb_entry(n, struct symbol, rb_node);
262 else if (ip > s->end)
271 struct symbol_name_rb_node {
272 struct rb_node rb_node;
276 static void symbols__insert_by_name(struct rb_root *self, struct symbol *sym)
278 struct rb_node **p = &self->rb_node;
279 struct rb_node *parent = NULL;
280 struct symbol_name_rb_node *symn = ((void *)sym) - sizeof(*parent), *s;
284 s = rb_entry(parent, struct symbol_name_rb_node, rb_node);
285 if (strcmp(sym->name, s->sym.name) < 0)
290 rb_link_node(&symn->rb_node, parent, p);
291 rb_insert_color(&symn->rb_node, self);
294 static void symbols__sort_by_name(struct rb_root *self, struct rb_root *source)
298 for (nd = rb_first(source); nd; nd = rb_next(nd)) {
299 struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
300 symbols__insert_by_name(self, pos);
304 static struct symbol *symbols__find_by_name(struct rb_root *self, const char *name)
314 struct symbol_name_rb_node *s;
317 s = rb_entry(n, struct symbol_name_rb_node, rb_node);
318 cmp = strcmp(name, s->sym.name);
331 struct symbol *dso__find_symbol(struct dso *self,
332 enum map_type type, u64 addr)
334 return symbols__find(&self->symbols[type], addr);
337 struct symbol *dso__find_symbol_by_name(struct dso *self, enum map_type type,
340 return symbols__find_by_name(&self->symbol_names[type], name);
343 void dso__sort_by_name(struct dso *self, enum map_type type)
345 dso__set_sorted_by_name(self, type);
346 return symbols__sort_by_name(&self->symbol_names[type],
347 &self->symbols[type]);
350 int build_id__sprintf(const u8 *self, int len, char *bf)
353 const u8 *raw = self;
356 for (i = 0; i < len; ++i) {
357 sprintf(bid, "%02x", *raw);
365 size_t dso__fprintf_buildid(struct dso *self, FILE *fp)
367 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
369 build_id__sprintf(self->build_id, sizeof(self->build_id), sbuild_id);
370 return fprintf(fp, "%s", sbuild_id);
373 size_t dso__fprintf(struct dso *self, enum map_type type, FILE *fp)
376 size_t ret = fprintf(fp, "dso: %s (", self->short_name);
378 if (self->short_name != self->long_name)
379 ret += fprintf(fp, "%s, ", self->long_name);
380 ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type],
381 self->loaded ? "" : "NOT ");
382 ret += dso__fprintf_buildid(self, fp);
383 ret += fprintf(fp, ")\n");
384 for (nd = rb_first(&self->symbols[type]); nd; nd = rb_next(nd)) {
385 struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
386 ret += symbol__fprintf(pos, fp);
392 int kallsyms__parse(const char *filename, void *arg,
393 int (*process_symbol)(void *arg, const char *name,
394 char type, u64 start))
399 FILE *file = fopen(filename, "r");
404 while (!feof(file)) {
410 line_len = getline(&line, &n, file);
411 if (line_len < 0 || !line)
414 line[--line_len] = '\0'; /* \n */
416 len = hex2u64(line, &start);
419 if (len + 2 >= line_len)
422 symbol_type = toupper(line[len]);
423 symbol_name = line + len + 2;
425 err = process_symbol(arg, symbol_name, symbol_type, start);
438 struct process_kallsyms_args {
443 static int map__process_kallsym_symbol(void *arg, const char *name,
444 char type, u64 start)
447 struct process_kallsyms_args *a = arg;
448 struct rb_root *root = &a->dso->symbols[a->map->type];
450 if (!symbol_type__is_a(type, a->map->type))
454 * Will fix up the end later, when we have all symbols sorted.
456 sym = symbol__new(start, 0, name);
461 * We will pass the symbols to the filter later, in
462 * map__split_kallsyms, when we have split the maps per module
464 symbols__insert(root, sym);
470 * Loads the function entries in /proc/kallsyms into kernel_map->dso,
471 * so that we can in the next step set the symbol ->end address and then
472 * call kernel_maps__split_kallsyms.
474 static int dso__load_all_kallsyms(struct dso *self, const char *filename,
477 struct process_kallsyms_args args = { .map = map, .dso = self, };
478 return kallsyms__parse(filename, &args, map__process_kallsym_symbol);
482 * Split the symbols into maps, making sure there are no overlaps, i.e. the
483 * kernel range is broken in several maps, named [kernel].N, as we don't have
484 * the original ELF section names vmlinux have.
486 static int dso__split_kallsyms(struct dso *self, struct map *map,
487 symbol_filter_t filter)
489 struct map_groups *kmaps = map__kmap(map)->kmaps;
490 struct machine *machine = kmaps->machine;
491 struct map *curr_map = map;
494 struct rb_root *root = &self->symbols[map->type];
495 struct rb_node *next = rb_first(root);
496 int kernel_range = 0;
501 pos = rb_entry(next, struct symbol, rb_node);
502 next = rb_next(&pos->rb_node);
504 module = strchr(pos->name, '\t');
506 if (!symbol_conf.use_modules)
511 if (strcmp(curr_map->dso->short_name, module)) {
512 if (curr_map != map &&
513 self->kernel == DSO_TYPE_GUEST_KERNEL &&
514 machine__is_default_guest(machine)) {
516 * We assume all symbols of a module are
517 * continuous in * kallsyms, so curr_map
518 * points to a module and all its
519 * symbols are in its kmap. Mark it as
522 dso__set_loaded(curr_map->dso,
526 curr_map = map_groups__find_by_name(kmaps,
528 if (curr_map == NULL) {
529 pr_debug("%s/proc/{kallsyms,modules} "
530 "inconsistency while looking "
531 "for \"%s\" module!\n",
532 machine->root_dir, module);
537 if (curr_map->dso->loaded &&
538 !machine__is_default_guest(machine))
542 * So that we look just like we get from .ko files,
543 * i.e. not prelinked, relative to map->start.
545 pos->start = curr_map->map_ip(curr_map, pos->start);
546 pos->end = curr_map->map_ip(curr_map, pos->end);
547 } else if (curr_map != map) {
548 char dso_name[PATH_MAX];
551 if (self->kernel == DSO_TYPE_GUEST_KERNEL)
552 snprintf(dso_name, sizeof(dso_name),
556 snprintf(dso_name, sizeof(dso_name),
560 dso = dso__new(dso_name);
564 dso->kernel = self->kernel;
566 curr_map = map__new2(pos->start, dso, map->type);
567 if (curr_map == NULL) {
572 curr_map->map_ip = curr_map->unmap_ip = identity__map_ip;
573 map_groups__insert(kmaps, curr_map);
577 if (filter && filter(curr_map, pos)) {
578 discard_symbol: rb_erase(&pos->rb_node, root);
581 if (curr_map != map) {
582 rb_erase(&pos->rb_node, root);
583 symbols__insert(&curr_map->dso->symbols[curr_map->type], pos);
589 if (curr_map != map &&
590 self->kernel == DSO_TYPE_GUEST_KERNEL &&
591 machine__is_default_guest(kmaps->machine)) {
592 dso__set_loaded(curr_map->dso, curr_map->type);
598 int dso__load_kallsyms(struct dso *self, const char *filename,
599 struct map *map, symbol_filter_t filter)
601 if (dso__load_all_kallsyms(self, filename, map) < 0)
604 symbols__fixup_end(&self->symbols[map->type]);
605 if (self->kernel == DSO_TYPE_GUEST_KERNEL)
606 self->origin = DSO__ORIG_GUEST_KERNEL;
608 self->origin = DSO__ORIG_KERNEL;
610 return dso__split_kallsyms(self, map, filter);
613 static int dso__load_perf_map(struct dso *self, struct map *map,
614 symbol_filter_t filter)
621 file = fopen(self->long_name, "r");
625 while (!feof(file)) {
630 line_len = getline(&line, &n, file);
637 line[--line_len] = '\0'; /* \n */
639 len = hex2u64(line, &start);
642 if (len + 2 >= line_len)
645 len += hex2u64(line + len, &size);
648 if (len + 2 >= line_len)
651 sym = symbol__new(start, size, line + len);
654 goto out_delete_line;
656 if (filter && filter(map, sym))
659 symbols__insert(&self->symbols[map->type], sym);
676 * elf_symtab__for_each_symbol - iterate thru all the symbols
678 * @self: struct elf_symtab instance to iterate
680 * @sym: GElf_Sym iterator
682 #define elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) \
683 for (idx = 0, gelf_getsym(syms, idx, &sym);\
685 idx++, gelf_getsym(syms, idx, &sym))
687 static inline uint8_t elf_sym__type(const GElf_Sym *sym)
689 return GELF_ST_TYPE(sym->st_info);
692 static inline int elf_sym__is_function(const GElf_Sym *sym)
694 return elf_sym__type(sym) == STT_FUNC &&
696 sym->st_shndx != SHN_UNDEF;
699 static inline bool elf_sym__is_object(const GElf_Sym *sym)
701 return elf_sym__type(sym) == STT_OBJECT &&
703 sym->st_shndx != SHN_UNDEF;
706 static inline int elf_sym__is_label(const GElf_Sym *sym)
708 return elf_sym__type(sym) == STT_NOTYPE &&
710 sym->st_shndx != SHN_UNDEF &&
711 sym->st_shndx != SHN_ABS;
714 static inline const char *elf_sec__name(const GElf_Shdr *shdr,
715 const Elf_Data *secstrs)
717 return secstrs->d_buf + shdr->sh_name;
720 static inline int elf_sec__is_text(const GElf_Shdr *shdr,
721 const Elf_Data *secstrs)
723 return strstr(elf_sec__name(shdr, secstrs), "text") != NULL;
726 static inline bool elf_sec__is_data(const GElf_Shdr *shdr,
727 const Elf_Data *secstrs)
729 return strstr(elf_sec__name(shdr, secstrs), "data") != NULL;
732 static inline const char *elf_sym__name(const GElf_Sym *sym,
733 const Elf_Data *symstrs)
735 return symstrs->d_buf + sym->st_name;
738 static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
739 GElf_Shdr *shp, const char *name,
745 while ((sec = elf_nextscn(elf, sec)) != NULL) {
748 gelf_getshdr(sec, shp);
749 str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name);
750 if (!strcmp(name, str)) {
761 #define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \
762 for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \
764 ++idx, pos = gelf_getrel(reldata, idx, &pos_mem))
766 #define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \
767 for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \
769 ++idx, pos = gelf_getrela(reldata, idx, &pos_mem))
772 * We need to check if we have a .dynsym, so that we can handle the
773 * .plt, synthesizing its symbols, that aren't on the symtabs (be it
774 * .dynsym or .symtab).
775 * And always look at the original dso, not at debuginfo packages, that
776 * have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS).
778 static int dso__synthesize_plt_symbols(struct dso *self, struct map *map,
779 symbol_filter_t filter)
781 uint32_t nr_rel_entries, idx;
786 GElf_Shdr shdr_rel_plt, shdr_dynsym;
787 Elf_Data *reldata, *syms, *symstrs;
788 Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym;
791 char sympltname[1024];
793 int nr = 0, symidx, fd, err = 0;
795 fd = open(self->long_name, O_RDONLY);
799 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
803 if (gelf_getehdr(elf, &ehdr) == NULL)
806 scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym,
807 ".dynsym", &dynsym_idx);
808 if (scn_dynsym == NULL)
811 scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,
813 if (scn_plt_rel == NULL) {
814 scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,
816 if (scn_plt_rel == NULL)
822 if (shdr_rel_plt.sh_link != dynsym_idx)
825 if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL)
829 * Fetch the relocation section to find the idxes to the GOT
830 * and the symbols in the .dynsym they refer to.
832 reldata = elf_getdata(scn_plt_rel, NULL);
836 syms = elf_getdata(scn_dynsym, NULL);
840 scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link);
841 if (scn_symstrs == NULL)
844 symstrs = elf_getdata(scn_symstrs, NULL);
848 nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize;
849 plt_offset = shdr_plt.sh_offset;
851 if (shdr_rel_plt.sh_type == SHT_RELA) {
852 GElf_Rela pos_mem, *pos;
854 elf_section__for_each_rela(reldata, pos, pos_mem, idx,
856 symidx = GELF_R_SYM(pos->r_info);
857 plt_offset += shdr_plt.sh_entsize;
858 gelf_getsym(syms, symidx, &sym);
859 snprintf(sympltname, sizeof(sympltname),
860 "%s@plt", elf_sym__name(&sym, symstrs));
862 f = symbol__new(plt_offset, shdr_plt.sh_entsize,
867 if (filter && filter(map, f))
870 symbols__insert(&self->symbols[map->type], f);
874 } else if (shdr_rel_plt.sh_type == SHT_REL) {
875 GElf_Rel pos_mem, *pos;
876 elf_section__for_each_rel(reldata, pos, pos_mem, idx,
878 symidx = GELF_R_SYM(pos->r_info);
879 plt_offset += shdr_plt.sh_entsize;
880 gelf_getsym(syms, symidx, &sym);
881 snprintf(sympltname, sizeof(sympltname),
882 "%s@plt", elf_sym__name(&sym, symstrs));
884 f = symbol__new(plt_offset, shdr_plt.sh_entsize,
889 if (filter && filter(map, f))
892 symbols__insert(&self->symbols[map->type], f);
907 pr_debug("%s: problems reading %s PLT info.\n",
908 __func__, self->long_name);
912 static bool elf_sym__is_a(GElf_Sym *self, enum map_type type)
916 return elf_sym__is_function(self);
918 return elf_sym__is_object(self);
924 static bool elf_sec__is_a(GElf_Shdr *self, Elf_Data *secstrs, enum map_type type)
928 return elf_sec__is_text(self, secstrs);
930 return elf_sec__is_data(self, secstrs);
936 static int dso__load_sym(struct dso *self, struct map *map, const char *name,
937 int fd, symbol_filter_t filter, int kmodule)
939 struct kmap *kmap = self->kernel ? map__kmap(map) : NULL;
940 struct map *curr_map = map;
941 struct dso *curr_dso = self;
942 Elf_Data *symstrs, *secstrs;
950 Elf_Scn *sec, *sec_strndx;
954 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
956 pr_err("%s: cannot read %s ELF file.\n", __func__, name);
960 if (gelf_getehdr(elf, &ehdr) == NULL) {
961 pr_err("%s: cannot get elf header.\n", __func__);
965 sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL);
967 sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL);
972 syms = elf_getdata(sec, NULL);
976 sec = elf_getscn(elf, shdr.sh_link);
980 symstrs = elf_getdata(sec, NULL);
984 sec_strndx = elf_getscn(elf, ehdr.e_shstrndx);
985 if (sec_strndx == NULL)
988 secstrs = elf_getdata(sec_strndx, NULL);
992 nr_syms = shdr.sh_size / shdr.sh_entsize;
994 memset(&sym, 0, sizeof(sym));
995 if (self->kernel == DSO_TYPE_USER) {
996 self->adjust_symbols = (ehdr.e_type == ET_EXEC ||
997 elf_section_by_name(elf, &ehdr, &shdr,
1000 } else self->adjust_symbols = 0;
1002 elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) {
1004 const char *elf_name = elf_sym__name(&sym, symstrs);
1005 char *demangled = NULL;
1006 int is_label = elf_sym__is_label(&sym);
1007 const char *section_name;
1009 if (kmap && kmap->ref_reloc_sym && kmap->ref_reloc_sym->name &&
1010 strcmp(elf_name, kmap->ref_reloc_sym->name) == 0)
1011 kmap->ref_reloc_sym->unrelocated_addr = sym.st_value;
1013 if (!is_label && !elf_sym__is_a(&sym, map->type))
1016 sec = elf_getscn(elf, sym.st_shndx);
1020 gelf_getshdr(sec, &shdr);
1022 if (is_label && !elf_sec__is_a(&shdr, secstrs, map->type))
1025 section_name = elf_sec__name(&shdr, secstrs);
1027 if (self->kernel != DSO_TYPE_USER || kmodule) {
1028 char dso_name[PATH_MAX];
1030 if (strcmp(section_name,
1031 (curr_dso->short_name +
1032 self->short_name_len)) == 0)
1035 if (strcmp(section_name, ".text") == 0) {
1041 snprintf(dso_name, sizeof(dso_name),
1042 "%s%s", self->short_name, section_name);
1044 curr_map = map_groups__find_by_name(kmap->kmaps, map->type, dso_name);
1045 if (curr_map == NULL) {
1046 u64 start = sym.st_value;
1049 start += map->start + shdr.sh_offset;
1051 curr_dso = dso__new(dso_name);
1052 if (curr_dso == NULL)
1054 curr_dso->kernel = self->kernel;
1055 curr_map = map__new2(start, curr_dso,
1057 if (curr_map == NULL) {
1058 dso__delete(curr_dso);
1061 curr_map->map_ip = identity__map_ip;
1062 curr_map->unmap_ip = identity__map_ip;
1063 curr_dso->origin = self->origin;
1064 map_groups__insert(kmap->kmaps, curr_map);
1065 dsos__add(&self->node, curr_dso);
1066 dso__set_loaded(curr_dso, map->type);
1068 curr_dso = curr_map->dso;
1073 if (curr_dso->adjust_symbols) {
1074 pr_debug4("%s: adjusting symbol: st_value: %#Lx "
1075 "sh_addr: %#Lx sh_offset: %#Lx\n", __func__,
1076 (u64)sym.st_value, (u64)shdr.sh_addr,
1077 (u64)shdr.sh_offset);
1078 sym.st_value -= shdr.sh_addr - shdr.sh_offset;
1081 * We need to figure out if the object was created from C++ sources
1082 * DWARF DW_compile_unit has this, but we don't always have access
1085 demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI);
1086 if (demangled != NULL)
1087 elf_name = demangled;
1089 f = symbol__new(sym.st_value, sym.st_size, elf_name);
1094 if (filter && filter(curr_map, f))
1097 symbols__insert(&curr_dso->symbols[curr_map->type], f);
1103 * For misannotated, zeroed, ASM function sizes.
1106 symbols__fixup_end(&self->symbols[map->type]);
1109 * We need to fixup this here too because we create new
1110 * maps here, for things like vsyscall sections.
1112 __map_groups__fixup_end(kmap->kmaps, map->type);
1122 static bool dso__build_id_equal(const struct dso *self, u8 *build_id)
1124 return memcmp(self->build_id, build_id, sizeof(self->build_id)) == 0;
1127 bool __dsos__read_build_ids(struct list_head *head, bool with_hits)
1129 bool have_build_id = false;
1132 list_for_each_entry(pos, head, node) {
1133 if (with_hits && !pos->hit)
1135 if (pos->has_build_id) {
1136 have_build_id = true;
1139 if (filename__read_build_id(pos->long_name, pos->build_id,
1140 sizeof(pos->build_id)) > 0) {
1141 have_build_id = true;
1142 pos->has_build_id = true;
1146 return have_build_id;
1150 * Align offset to 4 bytes as needed for note name and descriptor data.
1152 #define NOTE_ALIGN(n) (((n) + 3) & -4U)
1154 int filename__read_build_id(const char *filename, void *bf, size_t size)
1165 if (size < BUILD_ID_SIZE)
1168 fd = open(filename, O_RDONLY);
1172 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
1174 pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename);
1179 if (ek != ELF_K_ELF)
1182 if (gelf_getehdr(elf, &ehdr) == NULL) {
1183 pr_err("%s: cannot get elf header.\n", __func__);
1187 sec = elf_section_by_name(elf, &ehdr, &shdr,
1188 ".note.gnu.build-id", NULL);
1190 sec = elf_section_by_name(elf, &ehdr, &shdr,
1196 data = elf_getdata(sec, NULL);
1201 while (ptr < (data->d_buf + data->d_size)) {
1202 GElf_Nhdr *nhdr = ptr;
1203 int namesz = NOTE_ALIGN(nhdr->n_namesz),
1204 descsz = NOTE_ALIGN(nhdr->n_descsz);
1207 ptr += sizeof(*nhdr);
1210 if (nhdr->n_type == NT_GNU_BUILD_ID &&
1211 nhdr->n_namesz == sizeof("GNU")) {
1212 if (memcmp(name, "GNU", sizeof("GNU")) == 0) {
1213 memcpy(bf, ptr, BUILD_ID_SIZE);
1214 err = BUILD_ID_SIZE;
1228 int sysfs__read_build_id(const char *filename, void *build_id, size_t size)
1232 if (size < BUILD_ID_SIZE)
1235 fd = open(filename, O_RDONLY);
1244 if (read(fd, &nhdr, sizeof(nhdr)) != sizeof(nhdr))
1247 namesz = NOTE_ALIGN(nhdr.n_namesz);
1248 descsz = NOTE_ALIGN(nhdr.n_descsz);
1249 if (nhdr.n_type == NT_GNU_BUILD_ID &&
1250 nhdr.n_namesz == sizeof("GNU")) {
1251 if (read(fd, bf, namesz) != namesz)
1253 if (memcmp(bf, "GNU", sizeof("GNU")) == 0) {
1254 if (read(fd, build_id,
1255 BUILD_ID_SIZE) == BUILD_ID_SIZE) {
1259 } else if (read(fd, bf, descsz) != descsz)
1262 int n = namesz + descsz;
1263 if (read(fd, bf, n) != n)
1272 char dso__symtab_origin(const struct dso *self)
1274 static const char origin[] = {
1275 [DSO__ORIG_KERNEL] = 'k',
1276 [DSO__ORIG_JAVA_JIT] = 'j',
1277 [DSO__ORIG_BUILD_ID_CACHE] = 'B',
1278 [DSO__ORIG_FEDORA] = 'f',
1279 [DSO__ORIG_UBUNTU] = 'u',
1280 [DSO__ORIG_BUILDID] = 'b',
1281 [DSO__ORIG_DSO] = 'd',
1282 [DSO__ORIG_KMODULE] = 'K',
1283 [DSO__ORIG_GUEST_KERNEL] = 'g',
1284 [DSO__ORIG_GUEST_KMODULE] = 'G',
1287 if (self == NULL || self->origin == DSO__ORIG_NOT_FOUND)
1289 return origin[self->origin];
1292 int dso__load(struct dso *self, struct map *map, symbol_filter_t filter)
1294 int size = PATH_MAX;
1296 u8 build_id[BUILD_ID_SIZE];
1299 struct machine *machine;
1300 const char *root_dir;
1302 dso__set_loaded(self, map->type);
1304 if (self->kernel == DSO_TYPE_KERNEL)
1305 return dso__load_kernel_sym(self, map, filter);
1306 else if (self->kernel == DSO_TYPE_GUEST_KERNEL)
1307 return dso__load_guest_kernel_sym(self, map, filter);
1309 if (map->groups && map->groups->machine)
1310 machine = map->groups->machine;
1314 name = malloc(size);
1318 self->adjust_symbols = 0;
1320 if (strncmp(self->name, "/tmp/perf-", 10) == 0) {
1321 ret = dso__load_perf_map(self, map, filter);
1322 self->origin = ret > 0 ? DSO__ORIG_JAVA_JIT :
1323 DSO__ORIG_NOT_FOUND;
1327 self->origin = DSO__ORIG_BUILD_ID_CACHE;
1328 if (dso__build_id_filename(self, name, size) != NULL)
1333 switch (self->origin) {
1334 case DSO__ORIG_FEDORA:
1335 snprintf(name, size, "/usr/lib/debug%s.debug",
1338 case DSO__ORIG_UBUNTU:
1339 snprintf(name, size, "/usr/lib/debug%s",
1342 case DSO__ORIG_BUILDID:
1343 if (filename__read_build_id(self->long_name, build_id,
1344 sizeof(build_id))) {
1345 char build_id_hex[BUILD_ID_SIZE * 2 + 1];
1346 build_id__sprintf(build_id, sizeof(build_id),
1348 snprintf(name, size,
1349 "/usr/lib/debug/.build-id/%.2s/%s.debug",
1350 build_id_hex, build_id_hex + 2);
1351 if (self->has_build_id)
1352 goto compare_build_id;
1358 snprintf(name, size, "%s", self->long_name);
1360 case DSO__ORIG_GUEST_KMODULE:
1361 if (map->groups && map->groups->machine)
1362 root_dir = map->groups->machine->root_dir;
1365 snprintf(name, size, "%s%s", root_dir, self->long_name);
1372 if (self->has_build_id) {
1373 if (filename__read_build_id(name, build_id,
1374 sizeof(build_id)) < 0)
1377 if (!dso__build_id_equal(self, build_id))
1381 fd = open(name, O_RDONLY);
1384 ret = dso__load_sym(self, map, name, fd, filter, 0);
1388 * Some people seem to have debuginfo files _WITHOUT_ debug info!?!?
1394 int nr_plt = dso__synthesize_plt_symbols(self, map, filter);
1400 if (ret < 0 && strstr(self->name, " (deleted)") != NULL)
1405 struct map *map_groups__find_by_name(struct map_groups *self,
1406 enum map_type type, const char *name)
1410 for (nd = rb_first(&self->maps[type]); nd; nd = rb_next(nd)) {
1411 struct map *map = rb_entry(nd, struct map, rb_node);
1413 if (map->dso && strcmp(map->dso->short_name, name) == 0)
1420 static int dso__kernel_module_get_build_id(struct dso *self,
1421 const char *root_dir)
1423 char filename[PATH_MAX];
1425 * kernel module short names are of the form "[module]" and
1426 * we need just "module" here.
1428 const char *name = self->short_name + 1;
1430 snprintf(filename, sizeof(filename),
1431 "%s/sys/module/%.*s/notes/.note.gnu.build-id",
1432 root_dir, (int)strlen(name) - 1, name);
1434 if (sysfs__read_build_id(filename, self->build_id,
1435 sizeof(self->build_id)) == 0)
1436 self->has_build_id = true;
1441 static int map_groups__set_modules_path_dir(struct map_groups *self,
1442 const char *dir_name)
1444 struct dirent *dent;
1445 DIR *dir = opendir(dir_name);
1448 pr_debug("%s: cannot open %s dir\n", __func__, dir_name);
1452 while ((dent = readdir(dir)) != NULL) {
1453 char path[PATH_MAX];
1456 /*sshfs might return bad dent->d_type, so we have to stat*/
1457 sprintf(path, "%s/%s", dir_name, dent->d_name);
1458 if (stat(path, &st))
1461 if (S_ISDIR(st.st_mode)) {
1462 if (!strcmp(dent->d_name, ".") ||
1463 !strcmp(dent->d_name, ".."))
1466 snprintf(path, sizeof(path), "%s/%s",
1467 dir_name, dent->d_name);
1468 if (map_groups__set_modules_path_dir(self, path) < 0)
1471 char *dot = strrchr(dent->d_name, '.'),
1476 if (dot == NULL || strcmp(dot, ".ko"))
1478 snprintf(dso_name, sizeof(dso_name), "[%.*s]",
1479 (int)(dot - dent->d_name), dent->d_name);
1481 strxfrchar(dso_name, '-', '_');
1482 map = map_groups__find_by_name(self, MAP__FUNCTION, dso_name);
1486 snprintf(path, sizeof(path), "%s/%s",
1487 dir_name, dent->d_name);
1489 long_name = strdup(path);
1490 if (long_name == NULL)
1492 dso__set_long_name(map->dso, long_name);
1493 dso__kernel_module_get_build_id(map->dso, "");
1503 static char *get_kernel_version(const char *root_dir)
1505 char version[PATH_MAX];
1508 const char *prefix = "Linux version ";
1510 sprintf(version, "%s/proc/version", root_dir);
1511 file = fopen(version, "r");
1516 tmp = fgets(version, sizeof(version), file);
1519 name = strstr(version, prefix);
1522 name += strlen(prefix);
1523 tmp = strchr(name, ' ');
1527 return strdup(name);
1530 static int machine__set_modules_path(struct machine *self)
1533 char modules_path[PATH_MAX];
1535 version = get_kernel_version(self->root_dir);
1539 snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s/kernel",
1540 self->root_dir, version);
1543 return map_groups__set_modules_path_dir(&self->kmaps, modules_path);
1547 * Constructor variant for modules (where we know from /proc/modules where
1548 * they are loaded) and for vmlinux, where only after we load all the
1549 * symbols we'll know where it starts and ends.
1551 static struct map *map__new2(u64 start, struct dso *dso, enum map_type type)
1553 struct map *self = calloc(1, (sizeof(*self) +
1554 (dso->kernel ? sizeof(struct kmap) : 0)));
1557 * ->end will be filled after we load all the symbols
1559 map__init(self, type, start, 0, 0, dso);
1565 struct map *machine__new_module(struct machine *self, u64 start,
1566 const char *filename)
1569 struct dso *dso = __dsos__findnew(&self->kernel_dsos, filename);
1574 map = map__new2(start, dso, MAP__FUNCTION);
1578 if (machine__is_host(self))
1579 dso->origin = DSO__ORIG_KMODULE;
1581 dso->origin = DSO__ORIG_GUEST_KMODULE;
1582 map_groups__insert(&self->kmaps, map);
1586 static int machine__create_modules(struct machine *self)
1592 const char *modules;
1593 char path[PATH_MAX];
1595 if (machine__is_default_guest(self))
1596 modules = symbol_conf.default_guest_modules;
1598 sprintf(path, "%s/proc/modules", self->root_dir);
1602 file = fopen(modules, "r");
1606 while (!feof(file)) {
1607 char name[PATH_MAX];
1612 line_len = getline(&line, &n, file);
1619 line[--line_len] = '\0'; /* \n */
1621 sep = strrchr(line, 'x');
1625 hex2u64(sep + 1, &start);
1627 sep = strchr(line, ' ');
1633 snprintf(name, sizeof(name), "[%s]", line);
1634 map = machine__new_module(self, start, name);
1636 goto out_delete_line;
1637 dso__kernel_module_get_build_id(map->dso, self->root_dir);
1643 return machine__set_modules_path(self);
1651 static int dso__load_vmlinux(struct dso *self, struct map *map,
1652 const char *vmlinux, symbol_filter_t filter)
1656 if (self->has_build_id) {
1657 u8 build_id[BUILD_ID_SIZE];
1659 if (filename__read_build_id(vmlinux, build_id,
1660 sizeof(build_id)) < 0) {
1661 pr_debug("No build_id in %s, ignoring it\n", vmlinux);
1664 if (!dso__build_id_equal(self, build_id)) {
1665 char expected_build_id[BUILD_ID_SIZE * 2 + 1],
1666 vmlinux_build_id[BUILD_ID_SIZE * 2 + 1];
1668 build_id__sprintf(self->build_id,
1669 sizeof(self->build_id),
1671 build_id__sprintf(build_id, sizeof(build_id),
1673 pr_debug("build_id in %s is %s while expected is %s, "
1674 "ignoring it\n", vmlinux, vmlinux_build_id,
1680 fd = open(vmlinux, O_RDONLY);
1684 dso__set_loaded(self, map->type);
1685 err = dso__load_sym(self, map, vmlinux, fd, filter, 0);
1689 pr_debug("Using %s for symbols\n", vmlinux);
1694 int dso__load_vmlinux_path(struct dso *self, struct map *map,
1695 symbol_filter_t filter)
1700 pr_debug("Looking at the vmlinux_path (%d entries long)\n",
1701 vmlinux_path__nr_entries + 1);
1703 filename = dso__build_id_filename(self, NULL, 0);
1704 if (filename != NULL) {
1705 err = dso__load_vmlinux(self, map, filename, filter);
1707 dso__set_long_name(self, filename);
1713 for (i = 0; i < vmlinux_path__nr_entries; ++i) {
1714 err = dso__load_vmlinux(self, map, vmlinux_path[i], filter);
1716 dso__set_long_name(self, strdup(vmlinux_path[i]));
1724 static int dso__load_kernel_sym(struct dso *self, struct map *map,
1725 symbol_filter_t filter)
1728 const char *kallsyms_filename = NULL;
1729 char *kallsyms_allocated_filename = NULL;
1731 * Step 1: if the user specified a vmlinux filename, use it and only
1732 * it, reporting errors to the user if it cannot be used.
1734 * For instance, try to analyse an ARM perf.data file _without_ a
1735 * build-id, or if the user specifies the wrong path to the right
1736 * vmlinux file, obviously we can't fallback to another vmlinux (a
1737 * x86_86 one, on the machine where analysis is being performed, say),
1738 * or worse, /proc/kallsyms.
1740 * If the specified file _has_ a build-id and there is a build-id
1741 * section in the perf.data file, we will still do the expected
1742 * validation in dso__load_vmlinux and will bail out if they don't
1745 if (symbol_conf.vmlinux_name != NULL) {
1746 err = dso__load_vmlinux(self, map,
1747 symbol_conf.vmlinux_name, filter);
1749 dso__set_long_name(self,
1750 strdup(symbol_conf.vmlinux_name));
1756 if (vmlinux_path != NULL) {
1757 err = dso__load_vmlinux_path(self, map, filter);
1763 * Say the kernel DSO was created when processing the build-id header table,
1764 * we have a build-id, so check if it is the same as the running kernel,
1765 * using it if it is.
1767 if (self->has_build_id) {
1768 u8 kallsyms_build_id[BUILD_ID_SIZE];
1769 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
1771 if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id,
1772 sizeof(kallsyms_build_id)) == 0) {
1773 if (dso__build_id_equal(self, kallsyms_build_id)) {
1774 kallsyms_filename = "/proc/kallsyms";
1779 * Now look if we have it on the build-id cache in
1780 * $HOME/.debug/[kernel.kallsyms].
1782 build_id__sprintf(self->build_id, sizeof(self->build_id),
1785 if (asprintf(&kallsyms_allocated_filename,
1786 "%s/.debug/[kernel.kallsyms]/%s",
1787 getenv("HOME"), sbuild_id) == -1) {
1788 pr_err("Not enough memory for kallsyms file lookup\n");
1792 kallsyms_filename = kallsyms_allocated_filename;
1794 if (access(kallsyms_filename, F_OK)) {
1795 pr_err("No kallsyms or vmlinux with build-id %s "
1796 "was found\n", sbuild_id);
1797 free(kallsyms_allocated_filename);
1802 * Last resort, if we don't have a build-id and couldn't find
1803 * any vmlinux file, try the running kernel kallsyms table.
1805 kallsyms_filename = "/proc/kallsyms";
1809 err = dso__load_kallsyms(self, kallsyms_filename, map, filter);
1811 pr_debug("Using %s for symbols\n", kallsyms_filename);
1812 free(kallsyms_allocated_filename);
1816 if (kallsyms_filename != NULL)
1817 dso__set_long_name(self, strdup("[kernel.kallsyms]"));
1818 map__fixup_start(map);
1819 map__fixup_end(map);
1825 static int dso__load_guest_kernel_sym(struct dso *self, struct map *map,
1826 symbol_filter_t filter)
1829 const char *kallsyms_filename = NULL;
1830 struct machine *machine;
1831 char path[PATH_MAX];
1834 pr_debug("Guest kernel map hasn't the point to groups\n");
1837 machine = map->groups->machine;
1839 if (machine__is_default_guest(machine)) {
1841 * if the user specified a vmlinux filename, use it and only
1842 * it, reporting errors to the user if it cannot be used.
1843 * Or use file guest_kallsyms inputted by user on commandline
1845 if (symbol_conf.default_guest_vmlinux_name != NULL) {
1846 err = dso__load_vmlinux(self, map,
1847 symbol_conf.default_guest_vmlinux_name, filter);
1851 kallsyms_filename = symbol_conf.default_guest_kallsyms;
1852 if (!kallsyms_filename)
1855 sprintf(path, "%s/proc/kallsyms", machine->root_dir);
1856 kallsyms_filename = path;
1859 err = dso__load_kallsyms(self, kallsyms_filename, map, filter);
1861 pr_debug("Using %s for symbols\n", kallsyms_filename);
1865 if (kallsyms_filename != NULL) {
1866 machine__mmap_name(machine, path, sizeof(path));
1867 dso__set_long_name(self, strdup(path));
1869 map__fixup_start(map);
1870 map__fixup_end(map);
1876 static void dsos__add(struct list_head *head, struct dso *dso)
1878 list_add_tail(&dso->node, head);
1881 static struct dso *dsos__find(struct list_head *head, const char *name)
1885 list_for_each_entry(pos, head, node)
1886 if (strcmp(pos->long_name, name) == 0)
1891 struct dso *__dsos__findnew(struct list_head *head, const char *name)
1893 struct dso *dso = dsos__find(head, name);
1896 dso = dso__new(name);
1898 dsos__add(head, dso);
1899 dso__set_basename(dso);
1906 size_t __dsos__fprintf(struct list_head *head, FILE *fp)
1911 list_for_each_entry(pos, head, node) {
1913 for (i = 0; i < MAP__NR_TYPES; ++i)
1914 ret += dso__fprintf(pos, i, fp);
1920 size_t machines__fprintf_dsos(struct rb_root *self, FILE *fp)
1925 for (nd = rb_first(self); nd; nd = rb_next(nd)) {
1926 struct machine *pos = rb_entry(nd, struct machine, rb_node);
1927 ret += __dsos__fprintf(&pos->kernel_dsos, fp);
1928 ret += __dsos__fprintf(&pos->user_dsos, fp);
1934 static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp,
1940 list_for_each_entry(pos, head, node) {
1941 if (with_hits && !pos->hit)
1943 ret += dso__fprintf_buildid(pos, fp);
1944 ret += fprintf(fp, " %s\n", pos->long_name);
1949 size_t machine__fprintf_dsos_buildid(struct machine *self, FILE *fp, bool with_hits)
1951 return __dsos__fprintf_buildid(&self->kernel_dsos, fp, with_hits) +
1952 __dsos__fprintf_buildid(&self->user_dsos, fp, with_hits);
1955 size_t machines__fprintf_dsos_buildid(struct rb_root *self, FILE *fp, bool with_hits)
1960 for (nd = rb_first(self); nd; nd = rb_next(nd)) {
1961 struct machine *pos = rb_entry(nd, struct machine, rb_node);
1962 ret += machine__fprintf_dsos_buildid(pos, fp, with_hits);
1967 struct dso *dso__new_kernel(const char *name)
1969 struct dso *self = dso__new(name ?: "[kernel.kallsyms]");
1972 dso__set_short_name(self, "[kernel]");
1973 self->kernel = DSO_TYPE_KERNEL;
1979 static struct dso *dso__new_guest_kernel(struct machine *machine,
1983 struct dso *self = dso__new(name ?: machine__mmap_name(machine, bf, sizeof(bf)));
1986 dso__set_short_name(self, "[guest.kernel]");
1987 self->kernel = DSO_TYPE_GUEST_KERNEL;
1993 void dso__read_running_kernel_build_id(struct dso *self, struct machine *machine)
1995 char path[PATH_MAX];
1997 if (machine__is_default_guest(machine))
1999 sprintf(path, "%s/sys/kernel/notes", machine->root_dir);
2000 if (sysfs__read_build_id(path, self->build_id,
2001 sizeof(self->build_id)) == 0)
2002 self->has_build_id = true;
2005 static struct dso *machine__create_kernel(struct machine *self)
2007 const char *vmlinux_name = NULL;
2010 if (machine__is_host(self)) {
2011 vmlinux_name = symbol_conf.vmlinux_name;
2012 kernel = dso__new_kernel(vmlinux_name);
2014 if (machine__is_default_guest(self))
2015 vmlinux_name = symbol_conf.default_guest_vmlinux_name;
2016 kernel = dso__new_guest_kernel(self, vmlinux_name);
2019 if (kernel != NULL) {
2020 dso__read_running_kernel_build_id(kernel, self);
2021 dsos__add(&self->kernel_dsos, kernel);
2026 int __machine__create_kernel_maps(struct machine *self, struct dso *kernel)
2030 for (type = 0; type < MAP__NR_TYPES; ++type) {
2033 self->vmlinux_maps[type] = map__new2(0, kernel, type);
2034 if (self->vmlinux_maps[type] == NULL)
2037 self->vmlinux_maps[type]->map_ip =
2038 self->vmlinux_maps[type]->unmap_ip = identity__map_ip;
2040 kmap = map__kmap(self->vmlinux_maps[type]);
2041 kmap->kmaps = &self->kmaps;
2042 map_groups__insert(&self->kmaps, self->vmlinux_maps[type]);
2048 int machine__create_kernel_maps(struct machine *self)
2050 struct dso *kernel = machine__create_kernel(self);
2052 if (kernel == NULL ||
2053 __machine__create_kernel_maps(self, kernel) < 0)
2056 if (symbol_conf.use_modules && machine__create_modules(self) < 0)
2057 pr_debug("Problems creating module maps, continuing anyway...\n");
2059 * Now that we have all the maps created, just set the ->end of them:
2061 map_groups__fixup_end(&self->kmaps);
2065 static void vmlinux_path__exit(void)
2067 while (--vmlinux_path__nr_entries >= 0) {
2068 free(vmlinux_path[vmlinux_path__nr_entries]);
2069 vmlinux_path[vmlinux_path__nr_entries] = NULL;
2073 vmlinux_path = NULL;
2076 static int vmlinux_path__init(void)
2081 if (uname(&uts) < 0)
2084 vmlinux_path = malloc(sizeof(char *) * 5);
2085 if (vmlinux_path == NULL)
2088 vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux");
2089 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2091 ++vmlinux_path__nr_entries;
2092 vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux");
2093 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2095 ++vmlinux_path__nr_entries;
2096 snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", uts.release);
2097 vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
2098 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2100 ++vmlinux_path__nr_entries;
2101 snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", uts.release);
2102 vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
2103 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2105 ++vmlinux_path__nr_entries;
2106 snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux",
2108 vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
2109 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2111 ++vmlinux_path__nr_entries;
2116 vmlinux_path__exit();
2120 size_t machine__fprintf_vmlinux_path(struct machine *self, FILE *fp)
2124 struct dso *kdso = self->vmlinux_maps[MAP__FUNCTION]->dso;
2126 if (kdso->has_build_id) {
2127 char filename[PATH_MAX];
2128 if (dso__build_id_filename(kdso, filename, sizeof(filename)))
2129 printed += fprintf(fp, "[0] %s\n", filename);
2132 for (i = 0; i < vmlinux_path__nr_entries; ++i)
2133 printed += fprintf(fp, "[%d] %s\n",
2134 i + kdso->has_build_id, vmlinux_path[i]);
2139 static int setup_list(struct strlist **list, const char *list_str,
2140 const char *list_name)
2142 if (list_str == NULL)
2145 *list = strlist__new(true, list_str);
2147 pr_err("problems parsing %s list\n", list_name);
2153 int symbol__init(void)
2155 elf_version(EV_CURRENT);
2156 if (symbol_conf.sort_by_name)
2157 symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) -
2158 sizeof(struct symbol));
2160 if (symbol_conf.try_vmlinux_path && vmlinux_path__init() < 0)
2163 if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') {
2164 pr_err("'.' is the only non valid --field-separator argument\n");
2168 if (setup_list(&symbol_conf.dso_list,
2169 symbol_conf.dso_list_str, "dso") < 0)
2172 if (setup_list(&symbol_conf.comm_list,
2173 symbol_conf.comm_list_str, "comm") < 0)
2174 goto out_free_dso_list;
2176 if (setup_list(&symbol_conf.sym_list,
2177 symbol_conf.sym_list_str, "symbol") < 0)
2178 goto out_free_comm_list;
2183 strlist__delete(symbol_conf.dso_list);
2185 strlist__delete(symbol_conf.comm_list);
2189 int machines__create_kernel_maps(struct rb_root *self, pid_t pid)
2191 struct machine *machine = machines__findnew(self, pid);
2193 if (machine == NULL)
2196 return machine__create_kernel_maps(machine);
2199 static int hex(char ch)
2201 if ((ch >= '0') && (ch <= '9'))
2203 if ((ch >= 'a') && (ch <= 'f'))
2204 return ch - 'a' + 10;
2205 if ((ch >= 'A') && (ch <= 'F'))
2206 return ch - 'A' + 10;
2211 * While we find nice hex chars, build a long_val.
2212 * Return number of chars processed.
2214 int hex2u64(const char *ptr, u64 *long_val)
2216 const char *p = ptr;
2220 const int hex_val = hex(*p);
2225 *long_val = (*long_val << 4) | hex_val;
2232 char *strxfrchar(char *s, char from, char to)
2236 while ((p = strchr(p, from)) != NULL)
2242 int machines__create_guest_kernel_maps(struct rb_root *self)
2245 struct dirent **namelist = NULL;
2247 char path[PATH_MAX];
2250 if (symbol_conf.default_guest_vmlinux_name ||
2251 symbol_conf.default_guest_modules ||
2252 symbol_conf.default_guest_kallsyms) {
2253 machines__create_kernel_maps(self, DEFAULT_GUEST_KERNEL_ID);
2256 if (symbol_conf.guestmount) {
2257 items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL);
2260 for (i = 0; i < items; i++) {
2261 if (!isdigit(namelist[i]->d_name[0])) {
2262 /* Filter out . and .. */
2265 pid = atoi(namelist[i]->d_name);
2266 sprintf(path, "%s/%s/proc/kallsyms",
2267 symbol_conf.guestmount,
2268 namelist[i]->d_name);
2269 ret = access(path, R_OK);
2271 pr_debug("Can't access file %s\n", path);
2274 machines__create_kernel_maps(self, pid);
2283 int machine__load_kallsyms(struct machine *self, const char *filename,
2284 enum map_type type, symbol_filter_t filter)
2286 struct map *map = self->vmlinux_maps[type];
2287 int ret = dso__load_kallsyms(map->dso, filename, map, filter);
2290 dso__set_loaded(map->dso, type);
2292 * Since /proc/kallsyms will have multiple sessions for the
2293 * kernel, with modules between them, fixup the end of all
2296 __map_groups__fixup_end(&self->kmaps, type);
2302 int machine__load_vmlinux_path(struct machine *self, enum map_type type,
2303 symbol_filter_t filter)
2305 struct map *map = self->vmlinux_maps[type];
2306 int ret = dso__load_vmlinux_path(map->dso, map, filter);
2309 dso__set_loaded(map->dso, type);
2310 map__reloc_vmlinux(map);