11 #include <sys/param.h>
23 #include <sys/utsname.h>
25 #ifndef NT_GNU_BUILD_ID
26 #define NT_GNU_BUILD_ID 3
29 static bool dso__build_id_equal(const struct dso *self, u8 *build_id);
30 static int elf_read_build_id(Elf *elf, void *bf, size_t size);
31 static void dsos__add(struct list_head *head, struct dso *dso);
32 static struct map *map__new2(u64 start, struct dso *dso, enum map_type type);
33 static int dso__load_kernel_sym(struct dso *self, struct map *map,
34 symbol_filter_t filter);
35 static int dso__load_guest_kernel_sym(struct dso *self, struct map *map,
36 symbol_filter_t filter);
37 static int vmlinux_path__nr_entries;
38 static char **vmlinux_path;
40 struct symbol_conf symbol_conf = {
41 .exclude_other = true,
43 .try_vmlinux_path = true,
46 int dso__name_len(const struct dso *self)
49 return self->long_name_len;
51 return self->short_name_len;
54 bool dso__loaded(const struct dso *self, enum map_type type)
56 return self->loaded & (1 << type);
59 bool dso__sorted_by_name(const struct dso *self, enum map_type type)
61 return self->sorted_by_name & (1 << type);
64 static void dso__set_sorted_by_name(struct dso *self, enum map_type type)
66 self->sorted_by_name |= (1 << type);
69 bool symbol_type__is_a(char symbol_type, enum map_type map_type)
73 return symbol_type == 'T' || symbol_type == 'W';
75 return symbol_type == 'D' || symbol_type == 'd';
81 static void symbols__fixup_end(struct rb_root *self)
83 struct rb_node *nd, *prevnd = rb_first(self);
84 struct symbol *curr, *prev;
89 curr = rb_entry(prevnd, struct symbol, rb_node);
91 for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) {
93 curr = rb_entry(nd, struct symbol, rb_node);
95 if (prev->end == prev->start)
96 prev->end = curr->start - 1;
100 if (curr->end == curr->start)
101 curr->end = roundup(curr->start, 4096);
104 static void __map_groups__fixup_end(struct map_groups *self, enum map_type type)
106 struct map *prev, *curr;
107 struct rb_node *nd, *prevnd = rb_first(&self->maps[type]);
112 curr = rb_entry(prevnd, struct map, rb_node);
114 for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) {
116 curr = rb_entry(nd, struct map, rb_node);
117 prev->end = curr->start - 1;
121 * We still haven't the actual symbols, so guess the
122 * last map final address.
127 static void map_groups__fixup_end(struct map_groups *self)
130 for (i = 0; i < MAP__NR_TYPES; ++i)
131 __map_groups__fixup_end(self, i);
134 static struct symbol *symbol__new(u64 start, u64 len, u8 binding,
137 size_t namelen = strlen(name) + 1;
138 struct symbol *self = calloc(1, (symbol_conf.priv_size +
139 sizeof(*self) + namelen));
143 if (symbol_conf.priv_size)
144 self = ((void *)self) + symbol_conf.priv_size;
147 self->end = len ? start + len - 1 : start;
148 self->binding = binding;
149 self->namelen = namelen - 1;
151 pr_debug4("%s: %s %#Lx-%#Lx\n", __func__, name, start, self->end);
153 memcpy(self->name, name, namelen);
158 void symbol__delete(struct symbol *self)
160 free(((void *)self) - symbol_conf.priv_size);
163 static size_t symbol__fprintf(struct symbol *self, FILE *fp)
165 return fprintf(fp, " %llx-%llx %c %s\n",
166 self->start, self->end,
167 self->binding == STB_GLOBAL ? 'g' :
168 self->binding == STB_LOCAL ? 'l' : 'w',
172 void dso__set_long_name(struct dso *self, char *name)
176 self->long_name = name;
177 self->long_name_len = strlen(name);
180 static void dso__set_short_name(struct dso *self, const char *name)
184 self->short_name = name;
185 self->short_name_len = strlen(name);
188 static void dso__set_basename(struct dso *self)
190 dso__set_short_name(self, basename(self->long_name));
193 struct dso *dso__new(const char *name)
195 struct dso *self = calloc(1, sizeof(*self) + strlen(name) + 1);
199 strcpy(self->name, name);
200 dso__set_long_name(self, self->name);
201 dso__set_short_name(self, self->name);
202 for (i = 0; i < MAP__NR_TYPES; ++i)
203 self->symbols[i] = self->symbol_names[i] = RB_ROOT;
204 self->slen_calculated = 0;
205 self->origin = DSO__ORIG_NOT_FOUND;
207 self->sorted_by_name = 0;
208 self->has_build_id = 0;
209 self->kernel = DSO_TYPE_USER;
210 INIT_LIST_HEAD(&self->node);
216 static void symbols__delete(struct rb_root *self)
219 struct rb_node *next = rb_first(self);
222 pos = rb_entry(next, struct symbol, rb_node);
223 next = rb_next(&pos->rb_node);
224 rb_erase(&pos->rb_node, self);
229 void dso__delete(struct dso *self)
232 for (i = 0; i < MAP__NR_TYPES; ++i)
233 symbols__delete(&self->symbols[i]);
234 if (self->sname_alloc)
235 free((char *)self->short_name);
236 if (self->lname_alloc)
237 free(self->long_name);
241 void dso__set_build_id(struct dso *self, void *build_id)
243 memcpy(self->build_id, build_id, sizeof(self->build_id));
244 self->has_build_id = 1;
247 static void symbols__insert(struct rb_root *self, struct symbol *sym)
249 struct rb_node **p = &self->rb_node;
250 struct rb_node *parent = NULL;
251 const u64 ip = sym->start;
256 s = rb_entry(parent, struct symbol, rb_node);
262 rb_link_node(&sym->rb_node, parent, p);
263 rb_insert_color(&sym->rb_node, self);
266 static struct symbol *symbols__find(struct rb_root *self, u64 ip)
276 struct symbol *s = rb_entry(n, struct symbol, rb_node);
280 else if (ip > s->end)
289 struct symbol_name_rb_node {
290 struct rb_node rb_node;
294 static void symbols__insert_by_name(struct rb_root *self, struct symbol *sym)
296 struct rb_node **p = &self->rb_node;
297 struct rb_node *parent = NULL;
298 struct symbol_name_rb_node *symn, *s;
300 symn = container_of(sym, struct symbol_name_rb_node, sym);
304 s = rb_entry(parent, struct symbol_name_rb_node, rb_node);
305 if (strcmp(sym->name, s->sym.name) < 0)
310 rb_link_node(&symn->rb_node, parent, p);
311 rb_insert_color(&symn->rb_node, self);
314 static void symbols__sort_by_name(struct rb_root *self, struct rb_root *source)
318 for (nd = rb_first(source); nd; nd = rb_next(nd)) {
319 struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
320 symbols__insert_by_name(self, pos);
324 static struct symbol *symbols__find_by_name(struct rb_root *self, const char *name)
334 struct symbol_name_rb_node *s;
337 s = rb_entry(n, struct symbol_name_rb_node, rb_node);
338 cmp = strcmp(name, s->sym.name);
351 struct symbol *dso__find_symbol(struct dso *self,
352 enum map_type type, u64 addr)
354 return symbols__find(&self->symbols[type], addr);
357 struct symbol *dso__find_symbol_by_name(struct dso *self, enum map_type type,
360 return symbols__find_by_name(&self->symbol_names[type], name);
363 void dso__sort_by_name(struct dso *self, enum map_type type)
365 dso__set_sorted_by_name(self, type);
366 return symbols__sort_by_name(&self->symbol_names[type],
367 &self->symbols[type]);
370 int build_id__sprintf(const u8 *self, int len, char *bf)
373 const u8 *raw = self;
376 for (i = 0; i < len; ++i) {
377 sprintf(bid, "%02x", *raw);
385 size_t dso__fprintf_buildid(struct dso *self, FILE *fp)
387 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
389 build_id__sprintf(self->build_id, sizeof(self->build_id), sbuild_id);
390 return fprintf(fp, "%s", sbuild_id);
393 size_t dso__fprintf_symbols_by_name(struct dso *self, enum map_type type, FILE *fp)
397 struct symbol_name_rb_node *pos;
399 for (nd = rb_first(&self->symbol_names[type]); nd; nd = rb_next(nd)) {
400 pos = rb_entry(nd, struct symbol_name_rb_node, rb_node);
401 fprintf(fp, "%s\n", pos->sym.name);
407 size_t dso__fprintf(struct dso *self, enum map_type type, FILE *fp)
410 size_t ret = fprintf(fp, "dso: %s (", self->short_name);
412 if (self->short_name != self->long_name)
413 ret += fprintf(fp, "%s, ", self->long_name);
414 ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type],
415 self->loaded ? "" : "NOT ");
416 ret += dso__fprintf_buildid(self, fp);
417 ret += fprintf(fp, ")\n");
418 for (nd = rb_first(&self->symbols[type]); nd; nd = rb_next(nd)) {
419 struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
420 ret += symbol__fprintf(pos, fp);
426 int kallsyms__parse(const char *filename, void *arg,
427 int (*process_symbol)(void *arg, const char *name,
428 char type, u64 start))
433 FILE *file = fopen(filename, "r");
438 while (!feof(file)) {
444 line_len = getline(&line, &n, file);
445 if (line_len < 0 || !line)
448 line[--line_len] = '\0'; /* \n */
450 len = hex2u64(line, &start);
453 if (len + 2 >= line_len)
456 symbol_type = toupper(line[len]);
457 symbol_name = line + len + 2;
459 err = process_symbol(arg, symbol_name, symbol_type, start);
472 struct process_kallsyms_args {
477 static u8 kallsyms2elf_type(char type)
482 return isupper(type) ? STB_GLOBAL : STB_LOCAL;
485 static int map__process_kallsym_symbol(void *arg, const char *name,
486 char type, u64 start)
489 struct process_kallsyms_args *a = arg;
490 struct rb_root *root = &a->dso->symbols[a->map->type];
492 if (!symbol_type__is_a(type, a->map->type))
496 * Will fix up the end later, when we have all symbols sorted.
498 sym = symbol__new(start, 0, kallsyms2elf_type(type), name);
503 * We will pass the symbols to the filter later, in
504 * map__split_kallsyms, when we have split the maps per module
506 symbols__insert(root, sym);
512 * Loads the function entries in /proc/kallsyms into kernel_map->dso,
513 * so that we can in the next step set the symbol ->end address and then
514 * call kernel_maps__split_kallsyms.
516 static int dso__load_all_kallsyms(struct dso *self, const char *filename,
519 struct process_kallsyms_args args = { .map = map, .dso = self, };
520 return kallsyms__parse(filename, &args, map__process_kallsym_symbol);
524 * Split the symbols into maps, making sure there are no overlaps, i.e. the
525 * kernel range is broken in several maps, named [kernel].N, as we don't have
526 * the original ELF section names vmlinux have.
528 static int dso__split_kallsyms(struct dso *self, struct map *map,
529 symbol_filter_t filter)
531 struct map_groups *kmaps = map__kmap(map)->kmaps;
532 struct machine *machine = kmaps->machine;
533 struct map *curr_map = map;
536 struct rb_root *root = &self->symbols[map->type];
537 struct rb_node *next = rb_first(root);
538 int kernel_range = 0;
543 pos = rb_entry(next, struct symbol, rb_node);
544 next = rb_next(&pos->rb_node);
546 module = strchr(pos->name, '\t');
548 if (!symbol_conf.use_modules)
553 if (strcmp(curr_map->dso->short_name, module)) {
554 if (curr_map != map &&
555 self->kernel == DSO_TYPE_GUEST_KERNEL &&
556 machine__is_default_guest(machine)) {
558 * We assume all symbols of a module are
559 * continuous in * kallsyms, so curr_map
560 * points to a module and all its
561 * symbols are in its kmap. Mark it as
564 dso__set_loaded(curr_map->dso,
568 curr_map = map_groups__find_by_name(kmaps,
570 if (curr_map == NULL) {
571 pr_debug("%s/proc/{kallsyms,modules} "
572 "inconsistency while looking "
573 "for \"%s\" module!\n",
574 machine->root_dir, module);
579 if (curr_map->dso->loaded &&
580 !machine__is_default_guest(machine))
584 * So that we look just like we get from .ko files,
585 * i.e. not prelinked, relative to map->start.
587 pos->start = curr_map->map_ip(curr_map, pos->start);
588 pos->end = curr_map->map_ip(curr_map, pos->end);
589 } else if (curr_map != map) {
590 char dso_name[PATH_MAX];
593 if (self->kernel == DSO_TYPE_GUEST_KERNEL)
594 snprintf(dso_name, sizeof(dso_name),
598 snprintf(dso_name, sizeof(dso_name),
602 dso = dso__new(dso_name);
606 dso->kernel = self->kernel;
608 curr_map = map__new2(pos->start, dso, map->type);
609 if (curr_map == NULL) {
614 curr_map->map_ip = curr_map->unmap_ip = identity__map_ip;
615 map_groups__insert(kmaps, curr_map);
619 if (filter && filter(curr_map, pos)) {
620 discard_symbol: rb_erase(&pos->rb_node, root);
623 if (curr_map != map) {
624 rb_erase(&pos->rb_node, root);
625 symbols__insert(&curr_map->dso->symbols[curr_map->type], pos);
631 if (curr_map != map &&
632 self->kernel == DSO_TYPE_GUEST_KERNEL &&
633 machine__is_default_guest(kmaps->machine)) {
634 dso__set_loaded(curr_map->dso, curr_map->type);
640 int dso__load_kallsyms(struct dso *self, const char *filename,
641 struct map *map, symbol_filter_t filter)
643 if (dso__load_all_kallsyms(self, filename, map) < 0)
646 symbols__fixup_end(&self->symbols[map->type]);
647 if (self->kernel == DSO_TYPE_GUEST_KERNEL)
648 self->origin = DSO__ORIG_GUEST_KERNEL;
650 self->origin = DSO__ORIG_KERNEL;
652 return dso__split_kallsyms(self, map, filter);
655 static int dso__load_perf_map(struct dso *self, struct map *map,
656 symbol_filter_t filter)
663 file = fopen(self->long_name, "r");
667 while (!feof(file)) {
672 line_len = getline(&line, &n, file);
679 line[--line_len] = '\0'; /* \n */
681 len = hex2u64(line, &start);
684 if (len + 2 >= line_len)
687 len += hex2u64(line + len, &size);
690 if (len + 2 >= line_len)
693 sym = symbol__new(start, size, STB_GLOBAL, line + len);
696 goto out_delete_line;
698 if (filter && filter(map, sym))
701 symbols__insert(&self->symbols[map->type], sym);
718 * elf_symtab__for_each_symbol - iterate thru all the symbols
720 * @self: struct elf_symtab instance to iterate
722 * @sym: GElf_Sym iterator
724 #define elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) \
725 for (idx = 0, gelf_getsym(syms, idx, &sym);\
727 idx++, gelf_getsym(syms, idx, &sym))
729 static inline uint8_t elf_sym__type(const GElf_Sym *sym)
731 return GELF_ST_TYPE(sym->st_info);
734 static inline int elf_sym__is_function(const GElf_Sym *sym)
736 return elf_sym__type(sym) == STT_FUNC &&
738 sym->st_shndx != SHN_UNDEF;
741 static inline bool elf_sym__is_object(const GElf_Sym *sym)
743 return elf_sym__type(sym) == STT_OBJECT &&
745 sym->st_shndx != SHN_UNDEF;
748 static inline int elf_sym__is_label(const GElf_Sym *sym)
750 return elf_sym__type(sym) == STT_NOTYPE &&
752 sym->st_shndx != SHN_UNDEF &&
753 sym->st_shndx != SHN_ABS;
756 static inline const char *elf_sec__name(const GElf_Shdr *shdr,
757 const Elf_Data *secstrs)
759 return secstrs->d_buf + shdr->sh_name;
762 static inline int elf_sec__is_text(const GElf_Shdr *shdr,
763 const Elf_Data *secstrs)
765 return strstr(elf_sec__name(shdr, secstrs), "text") != NULL;
768 static inline bool elf_sec__is_data(const GElf_Shdr *shdr,
769 const Elf_Data *secstrs)
771 return strstr(elf_sec__name(shdr, secstrs), "data") != NULL;
774 static inline const char *elf_sym__name(const GElf_Sym *sym,
775 const Elf_Data *symstrs)
777 return symstrs->d_buf + sym->st_name;
780 static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
781 GElf_Shdr *shp, const char *name,
787 while ((sec = elf_nextscn(elf, sec)) != NULL) {
790 gelf_getshdr(sec, shp);
791 str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name);
792 if (!strcmp(name, str)) {
803 #define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \
804 for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \
806 ++idx, pos = gelf_getrel(reldata, idx, &pos_mem))
808 #define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \
809 for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \
811 ++idx, pos = gelf_getrela(reldata, idx, &pos_mem))
814 * We need to check if we have a .dynsym, so that we can handle the
815 * .plt, synthesizing its symbols, that aren't on the symtabs (be it
816 * .dynsym or .symtab).
817 * And always look at the original dso, not at debuginfo packages, that
818 * have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS).
820 static int dso__synthesize_plt_symbols(struct dso *self, struct map *map,
821 symbol_filter_t filter)
823 uint32_t nr_rel_entries, idx;
828 GElf_Shdr shdr_rel_plt, shdr_dynsym;
829 Elf_Data *reldata, *syms, *symstrs;
830 Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym;
833 char sympltname[1024];
835 int nr = 0, symidx, fd, err = 0;
837 fd = open(self->long_name, O_RDONLY);
841 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
845 if (gelf_getehdr(elf, &ehdr) == NULL)
848 scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym,
849 ".dynsym", &dynsym_idx);
850 if (scn_dynsym == NULL)
853 scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,
855 if (scn_plt_rel == NULL) {
856 scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,
858 if (scn_plt_rel == NULL)
864 if (shdr_rel_plt.sh_link != dynsym_idx)
867 if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL)
871 * Fetch the relocation section to find the idxes to the GOT
872 * and the symbols in the .dynsym they refer to.
874 reldata = elf_getdata(scn_plt_rel, NULL);
878 syms = elf_getdata(scn_dynsym, NULL);
882 scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link);
883 if (scn_symstrs == NULL)
886 symstrs = elf_getdata(scn_symstrs, NULL);
890 nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize;
891 plt_offset = shdr_plt.sh_offset;
893 if (shdr_rel_plt.sh_type == SHT_RELA) {
894 GElf_Rela pos_mem, *pos;
896 elf_section__for_each_rela(reldata, pos, pos_mem, idx,
898 symidx = GELF_R_SYM(pos->r_info);
899 plt_offset += shdr_plt.sh_entsize;
900 gelf_getsym(syms, symidx, &sym);
901 snprintf(sympltname, sizeof(sympltname),
902 "%s@plt", elf_sym__name(&sym, symstrs));
904 f = symbol__new(plt_offset, shdr_plt.sh_entsize,
905 STB_GLOBAL, sympltname);
909 if (filter && filter(map, f))
912 symbols__insert(&self->symbols[map->type], f);
916 } else if (shdr_rel_plt.sh_type == SHT_REL) {
917 GElf_Rel pos_mem, *pos;
918 elf_section__for_each_rel(reldata, pos, pos_mem, idx,
920 symidx = GELF_R_SYM(pos->r_info);
921 plt_offset += shdr_plt.sh_entsize;
922 gelf_getsym(syms, symidx, &sym);
923 snprintf(sympltname, sizeof(sympltname),
924 "%s@plt", elf_sym__name(&sym, symstrs));
926 f = symbol__new(plt_offset, shdr_plt.sh_entsize,
927 STB_GLOBAL, sympltname);
931 if (filter && filter(map, f))
934 symbols__insert(&self->symbols[map->type], f);
949 pr_debug("%s: problems reading %s PLT info.\n",
950 __func__, self->long_name);
954 static bool elf_sym__is_a(GElf_Sym *self, enum map_type type)
958 return elf_sym__is_function(self);
960 return elf_sym__is_object(self);
966 static bool elf_sec__is_a(GElf_Shdr *self, Elf_Data *secstrs, enum map_type type)
970 return elf_sec__is_text(self, secstrs);
972 return elf_sec__is_data(self, secstrs);
978 static size_t elf_addr_to_index(Elf *elf, GElf_Addr addr)
984 while ((sec = elf_nextscn(elf, sec)) != NULL) {
985 gelf_getshdr(sec, &shdr);
987 if ((addr >= shdr.sh_addr) &&
988 (addr < (shdr.sh_addr + shdr.sh_size)))
997 static int dso__load_sym(struct dso *self, struct map *map, const char *name,
998 int fd, symbol_filter_t filter, int kmodule,
1001 struct kmap *kmap = self->kernel ? map__kmap(map) : NULL;
1002 struct map *curr_map = map;
1003 struct dso *curr_dso = self;
1004 Elf_Data *symstrs, *secstrs;
1009 GElf_Shdr shdr, opdshdr;
1010 Elf_Data *syms, *opddata = NULL;
1012 Elf_Scn *sec, *sec_strndx, *opdsec;
1017 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
1019 pr_debug("%s: cannot read %s ELF file.\n", __func__, name);
1023 if (gelf_getehdr(elf, &ehdr) == NULL) {
1024 pr_debug("%s: cannot get elf header.\n", __func__);
1028 /* Always reject images with a mismatched build-id: */
1029 if (self->has_build_id) {
1030 u8 build_id[BUILD_ID_SIZE];
1032 if (elf_read_build_id(elf, build_id,
1033 BUILD_ID_SIZE) != BUILD_ID_SIZE)
1036 if (!dso__build_id_equal(self, build_id))
1040 sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL);
1045 sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL);
1050 opdsec = elf_section_by_name(elf, &ehdr, &opdshdr, ".opd", &opdidx);
1052 opddata = elf_rawdata(opdsec, NULL);
1054 syms = elf_getdata(sec, NULL);
1058 sec = elf_getscn(elf, shdr.sh_link);
1062 symstrs = elf_getdata(sec, NULL);
1063 if (symstrs == NULL)
1066 sec_strndx = elf_getscn(elf, ehdr.e_shstrndx);
1067 if (sec_strndx == NULL)
1070 secstrs = elf_getdata(sec_strndx, NULL);
1071 if (secstrs == NULL)
1074 nr_syms = shdr.sh_size / shdr.sh_entsize;
1076 memset(&sym, 0, sizeof(sym));
1077 if (self->kernel == DSO_TYPE_USER) {
1078 self->adjust_symbols = (ehdr.e_type == ET_EXEC ||
1079 elf_section_by_name(elf, &ehdr, &shdr,
1080 ".gnu.prelink_undo",
1082 } else self->adjust_symbols = 0;
1084 elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) {
1086 const char *elf_name = elf_sym__name(&sym, symstrs);
1087 char *demangled = NULL;
1088 int is_label = elf_sym__is_label(&sym);
1089 const char *section_name;
1091 if (kmap && kmap->ref_reloc_sym && kmap->ref_reloc_sym->name &&
1092 strcmp(elf_name, kmap->ref_reloc_sym->name) == 0)
1093 kmap->ref_reloc_sym->unrelocated_addr = sym.st_value;
1095 if (!is_label && !elf_sym__is_a(&sym, map->type))
1098 /* Reject ARM ELF "mapping symbols": these aren't unique and
1099 * don't identify functions, so will confuse the profile
1101 if (ehdr.e_machine == EM_ARM) {
1102 if (!strcmp(elf_name, "$a") ||
1103 !strcmp(elf_name, "$d") ||
1104 !strcmp(elf_name, "$t"))
1108 if (opdsec && sym.st_shndx == opdidx) {
1109 u32 offset = sym.st_value - opdshdr.sh_addr;
1110 u64 *opd = opddata->d_buf + offset;
1111 sym.st_value = *opd;
1112 sym.st_shndx = elf_addr_to_index(elf, sym.st_value);
1115 sec = elf_getscn(elf, sym.st_shndx);
1119 gelf_getshdr(sec, &shdr);
1121 if (is_label && !elf_sec__is_a(&shdr, secstrs, map->type))
1124 section_name = elf_sec__name(&shdr, secstrs);
1126 if (self->kernel != DSO_TYPE_USER || kmodule) {
1127 char dso_name[PATH_MAX];
1129 if (strcmp(section_name,
1130 (curr_dso->short_name +
1131 self->short_name_len)) == 0)
1134 if (strcmp(section_name, ".text") == 0) {
1140 snprintf(dso_name, sizeof(dso_name),
1141 "%s%s", self->short_name, section_name);
1143 curr_map = map_groups__find_by_name(kmap->kmaps, map->type, dso_name);
1144 if (curr_map == NULL) {
1145 u64 start = sym.st_value;
1148 start += map->start + shdr.sh_offset;
1150 curr_dso = dso__new(dso_name);
1151 if (curr_dso == NULL)
1153 curr_dso->kernel = self->kernel;
1154 curr_map = map__new2(start, curr_dso,
1156 if (curr_map == NULL) {
1157 dso__delete(curr_dso);
1160 curr_map->map_ip = identity__map_ip;
1161 curr_map->unmap_ip = identity__map_ip;
1162 curr_dso->origin = self->origin;
1163 map_groups__insert(kmap->kmaps, curr_map);
1164 dsos__add(&self->node, curr_dso);
1165 dso__set_loaded(curr_dso, map->type);
1167 curr_dso = curr_map->dso;
1172 if (curr_dso->adjust_symbols) {
1173 pr_debug4("%s: adjusting symbol: st_value: %#Lx "
1174 "sh_addr: %#Lx sh_offset: %#Lx\n", __func__,
1175 (u64)sym.st_value, (u64)shdr.sh_addr,
1176 (u64)shdr.sh_offset);
1177 sym.st_value -= shdr.sh_addr - shdr.sh_offset;
1180 * We need to figure out if the object was created from C++ sources
1181 * DWARF DW_compile_unit has this, but we don't always have access
1184 demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI);
1185 if (demangled != NULL)
1186 elf_name = demangled;
1188 f = symbol__new(sym.st_value, sym.st_size,
1189 GELF_ST_BIND(sym.st_info), elf_name);
1194 if (filter && filter(curr_map, f))
1197 symbols__insert(&curr_dso->symbols[curr_map->type], f);
1203 * For misannotated, zeroed, ASM function sizes.
1206 symbols__fixup_end(&self->symbols[map->type]);
1209 * We need to fixup this here too because we create new
1210 * maps here, for things like vsyscall sections.
1212 __map_groups__fixup_end(kmap->kmaps, map->type);
1222 static bool dso__build_id_equal(const struct dso *self, u8 *build_id)
1224 return memcmp(self->build_id, build_id, sizeof(self->build_id)) == 0;
1227 bool __dsos__read_build_ids(struct list_head *head, bool with_hits)
1229 bool have_build_id = false;
1232 list_for_each_entry(pos, head, node) {
1233 if (with_hits && !pos->hit)
1235 if (pos->has_build_id) {
1236 have_build_id = true;
1239 if (filename__read_build_id(pos->long_name, pos->build_id,
1240 sizeof(pos->build_id)) > 0) {
1241 have_build_id = true;
1242 pos->has_build_id = true;
1246 return have_build_id;
1250 * Align offset to 4 bytes as needed for note name and descriptor data.
1252 #define NOTE_ALIGN(n) (((n) + 3) & -4U)
1254 static int elf_read_build_id(Elf *elf, void *bf, size_t size)
1264 if (size < BUILD_ID_SIZE)
1268 if (ek != ELF_K_ELF)
1271 if (gelf_getehdr(elf, &ehdr) == NULL) {
1272 pr_err("%s: cannot get elf header.\n", __func__);
1276 sec = elf_section_by_name(elf, &ehdr, &shdr,
1277 ".note.gnu.build-id", NULL);
1279 sec = elf_section_by_name(elf, &ehdr, &shdr,
1285 data = elf_getdata(sec, NULL);
1290 while (ptr < (data->d_buf + data->d_size)) {
1291 GElf_Nhdr *nhdr = ptr;
1292 int namesz = NOTE_ALIGN(nhdr->n_namesz),
1293 descsz = NOTE_ALIGN(nhdr->n_descsz);
1296 ptr += sizeof(*nhdr);
1299 if (nhdr->n_type == NT_GNU_BUILD_ID &&
1300 nhdr->n_namesz == sizeof("GNU")) {
1301 if (memcmp(name, "GNU", sizeof("GNU")) == 0) {
1302 memcpy(bf, ptr, BUILD_ID_SIZE);
1303 err = BUILD_ID_SIZE;
1314 int filename__read_build_id(const char *filename, void *bf, size_t size)
1319 if (size < BUILD_ID_SIZE)
1322 fd = open(filename, O_RDONLY);
1326 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
1328 pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename);
1332 err = elf_read_build_id(elf, bf, size);
1341 int sysfs__read_build_id(const char *filename, void *build_id, size_t size)
1345 if (size < BUILD_ID_SIZE)
1348 fd = open(filename, O_RDONLY);
1357 if (read(fd, &nhdr, sizeof(nhdr)) != sizeof(nhdr))
1360 namesz = NOTE_ALIGN(nhdr.n_namesz);
1361 descsz = NOTE_ALIGN(nhdr.n_descsz);
1362 if (nhdr.n_type == NT_GNU_BUILD_ID &&
1363 nhdr.n_namesz == sizeof("GNU")) {
1364 if (read(fd, bf, namesz) != namesz)
1366 if (memcmp(bf, "GNU", sizeof("GNU")) == 0) {
1367 if (read(fd, build_id,
1368 BUILD_ID_SIZE) == BUILD_ID_SIZE) {
1372 } else if (read(fd, bf, descsz) != descsz)
1375 int n = namesz + descsz;
1376 if (read(fd, bf, n) != n)
1385 char dso__symtab_origin(const struct dso *self)
1387 static const char origin[] = {
1388 [DSO__ORIG_KERNEL] = 'k',
1389 [DSO__ORIG_JAVA_JIT] = 'j',
1390 [DSO__ORIG_BUILD_ID_CACHE] = 'B',
1391 [DSO__ORIG_FEDORA] = 'f',
1392 [DSO__ORIG_UBUNTU] = 'u',
1393 [DSO__ORIG_BUILDID] = 'b',
1394 [DSO__ORIG_DSO] = 'd',
1395 [DSO__ORIG_KMODULE] = 'K',
1396 [DSO__ORIG_GUEST_KERNEL] = 'g',
1397 [DSO__ORIG_GUEST_KMODULE] = 'G',
1400 if (self == NULL || self->origin == DSO__ORIG_NOT_FOUND)
1402 return origin[self->origin];
1405 int dso__load(struct dso *self, struct map *map, symbol_filter_t filter)
1407 int size = PATH_MAX;
1411 struct machine *machine;
1412 const char *root_dir;
1415 dso__set_loaded(self, map->type);
1417 if (self->kernel == DSO_TYPE_KERNEL)
1418 return dso__load_kernel_sym(self, map, filter);
1419 else if (self->kernel == DSO_TYPE_GUEST_KERNEL)
1420 return dso__load_guest_kernel_sym(self, map, filter);
1422 if (map->groups && map->groups->machine)
1423 machine = map->groups->machine;
1427 name = malloc(size);
1431 self->adjust_symbols = 0;
1433 if (strncmp(self->name, "/tmp/perf-", 10) == 0) {
1434 ret = dso__load_perf_map(self, map, filter);
1435 self->origin = ret > 0 ? DSO__ORIG_JAVA_JIT :
1436 DSO__ORIG_NOT_FOUND;
1440 /* Iterate over candidate debug images.
1441 * On the first pass, only load images if they have a full symtab.
1442 * Failing that, do a second pass where we accept .dynsym also
1444 for (self->origin = DSO__ORIG_BUILD_ID_CACHE, want_symtab = 1;
1445 self->origin != DSO__ORIG_NOT_FOUND;
1447 switch (self->origin) {
1448 case DSO__ORIG_BUILD_ID_CACHE:
1449 if (dso__build_id_filename(self, name, size) == NULL)
1452 case DSO__ORIG_FEDORA:
1453 snprintf(name, size, "/usr/lib/debug%s.debug",
1456 case DSO__ORIG_UBUNTU:
1457 snprintf(name, size, "/usr/lib/debug%s",
1460 case DSO__ORIG_BUILDID: {
1461 char build_id_hex[BUILD_ID_SIZE * 2 + 1];
1463 if (!self->has_build_id)
1466 build_id__sprintf(self->build_id,
1467 sizeof(self->build_id),
1469 snprintf(name, size,
1470 "/usr/lib/debug/.build-id/%.2s/%s.debug",
1471 build_id_hex, build_id_hex + 2);
1475 snprintf(name, size, "%s", self->long_name);
1477 case DSO__ORIG_GUEST_KMODULE:
1478 if (map->groups && map->groups->machine)
1479 root_dir = map->groups->machine->root_dir;
1482 snprintf(name, size, "%s%s", root_dir, self->long_name);
1487 * If we wanted a full symtab but no image had one,
1488 * relax our requirements and repeat the search.
1492 self->origin = DSO__ORIG_BUILD_ID_CACHE;
1497 /* Name is now the name of the next image to try */
1498 fd = open(name, O_RDONLY);
1502 ret = dso__load_sym(self, map, name, fd, filter, 0,
1507 * Some people seem to have debuginfo files _WITHOUT_ debug
1514 int nr_plt = dso__synthesize_plt_symbols(self, map, filter);
1522 if (ret < 0 && strstr(self->name, " (deleted)") != NULL)
1527 struct map *map_groups__find_by_name(struct map_groups *self,
1528 enum map_type type, const char *name)
1532 for (nd = rb_first(&self->maps[type]); nd; nd = rb_next(nd)) {
1533 struct map *map = rb_entry(nd, struct map, rb_node);
1535 if (map->dso && strcmp(map->dso->short_name, name) == 0)
1542 static int dso__kernel_module_get_build_id(struct dso *self,
1543 const char *root_dir)
1545 char filename[PATH_MAX];
1547 * kernel module short names are of the form "[module]" and
1548 * we need just "module" here.
1550 const char *name = self->short_name + 1;
1552 snprintf(filename, sizeof(filename),
1553 "%s/sys/module/%.*s/notes/.note.gnu.build-id",
1554 root_dir, (int)strlen(name) - 1, name);
1556 if (sysfs__read_build_id(filename, self->build_id,
1557 sizeof(self->build_id)) == 0)
1558 self->has_build_id = true;
1563 static int map_groups__set_modules_path_dir(struct map_groups *self,
1564 const char *dir_name)
1566 struct dirent *dent;
1567 DIR *dir = opendir(dir_name);
1571 pr_debug("%s: cannot open %s dir\n", __func__, dir_name);
1575 while ((dent = readdir(dir)) != NULL) {
1576 char path[PATH_MAX];
1579 /*sshfs might return bad dent->d_type, so we have to stat*/
1580 sprintf(path, "%s/%s", dir_name, dent->d_name);
1581 if (stat(path, &st))
1584 if (S_ISDIR(st.st_mode)) {
1585 if (!strcmp(dent->d_name, ".") ||
1586 !strcmp(dent->d_name, ".."))
1589 snprintf(path, sizeof(path), "%s/%s",
1590 dir_name, dent->d_name);
1591 ret = map_groups__set_modules_path_dir(self, path);
1595 char *dot = strrchr(dent->d_name, '.'),
1600 if (dot == NULL || strcmp(dot, ".ko"))
1602 snprintf(dso_name, sizeof(dso_name), "[%.*s]",
1603 (int)(dot - dent->d_name), dent->d_name);
1605 strxfrchar(dso_name, '-', '_');
1606 map = map_groups__find_by_name(self, MAP__FUNCTION, dso_name);
1610 snprintf(path, sizeof(path), "%s/%s",
1611 dir_name, dent->d_name);
1613 long_name = strdup(path);
1614 if (long_name == NULL) {
1618 dso__set_long_name(map->dso, long_name);
1619 map->dso->lname_alloc = 1;
1620 dso__kernel_module_get_build_id(map->dso, "");
1629 static char *get_kernel_version(const char *root_dir)
1631 char version[PATH_MAX];
1634 const char *prefix = "Linux version ";
1636 sprintf(version, "%s/proc/version", root_dir);
1637 file = fopen(version, "r");
1642 tmp = fgets(version, sizeof(version), file);
1645 name = strstr(version, prefix);
1648 name += strlen(prefix);
1649 tmp = strchr(name, ' ');
1653 return strdup(name);
1656 static int machine__set_modules_path(struct machine *self)
1659 char modules_path[PATH_MAX];
1661 version = get_kernel_version(self->root_dir);
1665 snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s/kernel",
1666 self->root_dir, version);
1669 return map_groups__set_modules_path_dir(&self->kmaps, modules_path);
1673 * Constructor variant for modules (where we know from /proc/modules where
1674 * they are loaded) and for vmlinux, where only after we load all the
1675 * symbols we'll know where it starts and ends.
1677 static struct map *map__new2(u64 start, struct dso *dso, enum map_type type)
1679 struct map *self = calloc(1, (sizeof(*self) +
1680 (dso->kernel ? sizeof(struct kmap) : 0)));
1683 * ->end will be filled after we load all the symbols
1685 map__init(self, type, start, 0, 0, dso);
1691 struct map *machine__new_module(struct machine *self, u64 start,
1692 const char *filename)
1695 struct dso *dso = __dsos__findnew(&self->kernel_dsos, filename);
1700 map = map__new2(start, dso, MAP__FUNCTION);
1704 if (machine__is_host(self))
1705 dso->origin = DSO__ORIG_KMODULE;
1707 dso->origin = DSO__ORIG_GUEST_KMODULE;
1708 map_groups__insert(&self->kmaps, map);
1712 static int machine__create_modules(struct machine *self)
1718 const char *modules;
1719 char path[PATH_MAX];
1721 if (machine__is_default_guest(self))
1722 modules = symbol_conf.default_guest_modules;
1724 sprintf(path, "%s/proc/modules", self->root_dir);
1728 file = fopen(modules, "r");
1732 while (!feof(file)) {
1733 char name[PATH_MAX];
1738 line_len = getline(&line, &n, file);
1745 line[--line_len] = '\0'; /* \n */
1747 sep = strrchr(line, 'x');
1751 hex2u64(sep + 1, &start);
1753 sep = strchr(line, ' ');
1759 snprintf(name, sizeof(name), "[%s]", line);
1760 map = machine__new_module(self, start, name);
1762 goto out_delete_line;
1763 dso__kernel_module_get_build_id(map->dso, self->root_dir);
1769 return machine__set_modules_path(self);
1777 static int dso__load_vmlinux(struct dso *self, struct map *map,
1778 const char *vmlinux, symbol_filter_t filter)
1782 fd = open(vmlinux, O_RDONLY);
1786 dso__set_loaded(self, map->type);
1787 err = dso__load_sym(self, map, vmlinux, fd, filter, 0, 0);
1791 pr_debug("Using %s for symbols\n", vmlinux);
1796 int dso__load_vmlinux_path(struct dso *self, struct map *map,
1797 symbol_filter_t filter)
1802 pr_debug("Looking at the vmlinux_path (%d entries long)\n",
1803 vmlinux_path__nr_entries + 1);
1805 filename = dso__build_id_filename(self, NULL, 0);
1806 if (filename != NULL) {
1807 err = dso__load_vmlinux(self, map, filename, filter);
1809 dso__set_long_name(self, filename);
1815 for (i = 0; i < vmlinux_path__nr_entries; ++i) {
1816 err = dso__load_vmlinux(self, map, vmlinux_path[i], filter);
1818 dso__set_long_name(self, strdup(vmlinux_path[i]));
1826 static int dso__load_kernel_sym(struct dso *self, struct map *map,
1827 symbol_filter_t filter)
1830 const char *kallsyms_filename = NULL;
1831 char *kallsyms_allocated_filename = NULL;
1833 * Step 1: if the user specified a vmlinux filename, use it and only
1834 * it, reporting errors to the user if it cannot be used.
1836 * For instance, try to analyse an ARM perf.data file _without_ a
1837 * build-id, or if the user specifies the wrong path to the right
1838 * vmlinux file, obviously we can't fallback to another vmlinux (a
1839 * x86_86 one, on the machine where analysis is being performed, say),
1840 * or worse, /proc/kallsyms.
1842 * If the specified file _has_ a build-id and there is a build-id
1843 * section in the perf.data file, we will still do the expected
1844 * validation in dso__load_vmlinux and will bail out if they don't
1847 if (symbol_conf.vmlinux_name != NULL) {
1848 err = dso__load_vmlinux(self, map,
1849 symbol_conf.vmlinux_name, filter);
1851 dso__set_long_name(self,
1852 strdup(symbol_conf.vmlinux_name));
1858 if (vmlinux_path != NULL) {
1859 err = dso__load_vmlinux_path(self, map, filter);
1865 * Say the kernel DSO was created when processing the build-id header table,
1866 * we have a build-id, so check if it is the same as the running kernel,
1867 * using it if it is.
1869 if (self->has_build_id) {
1870 u8 kallsyms_build_id[BUILD_ID_SIZE];
1871 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
1873 if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id,
1874 sizeof(kallsyms_build_id)) == 0) {
1875 if (dso__build_id_equal(self, kallsyms_build_id)) {
1876 kallsyms_filename = "/proc/kallsyms";
1881 * Now look if we have it on the build-id cache in
1882 * $HOME/.debug/[kernel.kallsyms].
1884 build_id__sprintf(self->build_id, sizeof(self->build_id),
1887 if (asprintf(&kallsyms_allocated_filename,
1888 "%s/.debug/[kernel.kallsyms]/%s",
1889 getenv("HOME"), sbuild_id) == -1) {
1890 pr_err("Not enough memory for kallsyms file lookup\n");
1894 kallsyms_filename = kallsyms_allocated_filename;
1896 if (access(kallsyms_filename, F_OK)) {
1897 pr_err("No kallsyms or vmlinux with build-id %s "
1898 "was found\n", sbuild_id);
1899 free(kallsyms_allocated_filename);
1904 * Last resort, if we don't have a build-id and couldn't find
1905 * any vmlinux file, try the running kernel kallsyms table.
1907 kallsyms_filename = "/proc/kallsyms";
1911 err = dso__load_kallsyms(self, kallsyms_filename, map, filter);
1913 pr_debug("Using %s for symbols\n", kallsyms_filename);
1914 free(kallsyms_allocated_filename);
1918 if (kallsyms_filename != NULL)
1919 dso__set_long_name(self, strdup("[kernel.kallsyms]"));
1920 map__fixup_start(map);
1921 map__fixup_end(map);
1927 static int dso__load_guest_kernel_sym(struct dso *self, struct map *map,
1928 symbol_filter_t filter)
1931 const char *kallsyms_filename = NULL;
1932 struct machine *machine;
1933 char path[PATH_MAX];
1936 pr_debug("Guest kernel map hasn't the point to groups\n");
1939 machine = map->groups->machine;
1941 if (machine__is_default_guest(machine)) {
1943 * if the user specified a vmlinux filename, use it and only
1944 * it, reporting errors to the user if it cannot be used.
1945 * Or use file guest_kallsyms inputted by user on commandline
1947 if (symbol_conf.default_guest_vmlinux_name != NULL) {
1948 err = dso__load_vmlinux(self, map,
1949 symbol_conf.default_guest_vmlinux_name, filter);
1953 kallsyms_filename = symbol_conf.default_guest_kallsyms;
1954 if (!kallsyms_filename)
1957 sprintf(path, "%s/proc/kallsyms", machine->root_dir);
1958 kallsyms_filename = path;
1961 err = dso__load_kallsyms(self, kallsyms_filename, map, filter);
1963 pr_debug("Using %s for symbols\n", kallsyms_filename);
1967 if (kallsyms_filename != NULL) {
1968 machine__mmap_name(machine, path, sizeof(path));
1969 dso__set_long_name(self, strdup(path));
1971 map__fixup_start(map);
1972 map__fixup_end(map);
1978 static void dsos__add(struct list_head *head, struct dso *dso)
1980 list_add_tail(&dso->node, head);
1983 static struct dso *dsos__find(struct list_head *head, const char *name)
1987 list_for_each_entry(pos, head, node)
1988 if (strcmp(pos->long_name, name) == 0)
1993 struct dso *__dsos__findnew(struct list_head *head, const char *name)
1995 struct dso *dso = dsos__find(head, name);
1998 dso = dso__new(name);
2000 dsos__add(head, dso);
2001 dso__set_basename(dso);
2008 size_t __dsos__fprintf(struct list_head *head, FILE *fp)
2013 list_for_each_entry(pos, head, node) {
2015 for (i = 0; i < MAP__NR_TYPES; ++i)
2016 ret += dso__fprintf(pos, i, fp);
2022 size_t machines__fprintf_dsos(struct rb_root *self, FILE *fp)
2027 for (nd = rb_first(self); nd; nd = rb_next(nd)) {
2028 struct machine *pos = rb_entry(nd, struct machine, rb_node);
2029 ret += __dsos__fprintf(&pos->kernel_dsos, fp);
2030 ret += __dsos__fprintf(&pos->user_dsos, fp);
2036 static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp,
2042 list_for_each_entry(pos, head, node) {
2043 if (with_hits && !pos->hit)
2045 ret += dso__fprintf_buildid(pos, fp);
2046 ret += fprintf(fp, " %s\n", pos->long_name);
2051 size_t machine__fprintf_dsos_buildid(struct machine *self, FILE *fp, bool with_hits)
2053 return __dsos__fprintf_buildid(&self->kernel_dsos, fp, with_hits) +
2054 __dsos__fprintf_buildid(&self->user_dsos, fp, with_hits);
2057 size_t machines__fprintf_dsos_buildid(struct rb_root *self, FILE *fp, bool with_hits)
2062 for (nd = rb_first(self); nd; nd = rb_next(nd)) {
2063 struct machine *pos = rb_entry(nd, struct machine, rb_node);
2064 ret += machine__fprintf_dsos_buildid(pos, fp, with_hits);
2069 struct dso *dso__new_kernel(const char *name)
2071 struct dso *self = dso__new(name ?: "[kernel.kallsyms]");
2074 dso__set_short_name(self, "[kernel]");
2075 self->kernel = DSO_TYPE_KERNEL;
2081 static struct dso *dso__new_guest_kernel(struct machine *machine,
2085 struct dso *self = dso__new(name ?: machine__mmap_name(machine, bf, sizeof(bf)));
2088 dso__set_short_name(self, "[guest.kernel]");
2089 self->kernel = DSO_TYPE_GUEST_KERNEL;
2095 void dso__read_running_kernel_build_id(struct dso *self, struct machine *machine)
2097 char path[PATH_MAX];
2099 if (machine__is_default_guest(machine))
2101 sprintf(path, "%s/sys/kernel/notes", machine->root_dir);
2102 if (sysfs__read_build_id(path, self->build_id,
2103 sizeof(self->build_id)) == 0)
2104 self->has_build_id = true;
2107 static struct dso *machine__create_kernel(struct machine *self)
2109 const char *vmlinux_name = NULL;
2112 if (machine__is_host(self)) {
2113 vmlinux_name = symbol_conf.vmlinux_name;
2114 kernel = dso__new_kernel(vmlinux_name);
2116 if (machine__is_default_guest(self))
2117 vmlinux_name = symbol_conf.default_guest_vmlinux_name;
2118 kernel = dso__new_guest_kernel(self, vmlinux_name);
2121 if (kernel != NULL) {
2122 dso__read_running_kernel_build_id(kernel, self);
2123 dsos__add(&self->kernel_dsos, kernel);
2128 int __machine__create_kernel_maps(struct machine *self, struct dso *kernel)
2132 for (type = 0; type < MAP__NR_TYPES; ++type) {
2135 self->vmlinux_maps[type] = map__new2(0, kernel, type);
2136 if (self->vmlinux_maps[type] == NULL)
2139 self->vmlinux_maps[type]->map_ip =
2140 self->vmlinux_maps[type]->unmap_ip = identity__map_ip;
2142 kmap = map__kmap(self->vmlinux_maps[type]);
2143 kmap->kmaps = &self->kmaps;
2144 map_groups__insert(&self->kmaps, self->vmlinux_maps[type]);
2150 void machine__destroy_kernel_maps(struct machine *self)
2154 for (type = 0; type < MAP__NR_TYPES; ++type) {
2157 if (self->vmlinux_maps[type] == NULL)
2160 kmap = map__kmap(self->vmlinux_maps[type]);
2161 map_groups__remove(&self->kmaps, self->vmlinux_maps[type]);
2162 if (kmap->ref_reloc_sym) {
2164 * ref_reloc_sym is shared among all maps, so free just
2167 if (type == MAP__FUNCTION) {
2168 free((char *)kmap->ref_reloc_sym->name);
2169 kmap->ref_reloc_sym->name = NULL;
2170 free(kmap->ref_reloc_sym);
2172 kmap->ref_reloc_sym = NULL;
2175 map__delete(self->vmlinux_maps[type]);
2176 self->vmlinux_maps[type] = NULL;
2180 int machine__create_kernel_maps(struct machine *self)
2182 struct dso *kernel = machine__create_kernel(self);
2184 if (kernel == NULL ||
2185 __machine__create_kernel_maps(self, kernel) < 0)
2188 if (symbol_conf.use_modules && machine__create_modules(self) < 0)
2189 pr_debug("Problems creating module maps, continuing anyway...\n");
2191 * Now that we have all the maps created, just set the ->end of them:
2193 map_groups__fixup_end(&self->kmaps);
2197 static void vmlinux_path__exit(void)
2199 while (--vmlinux_path__nr_entries >= 0) {
2200 free(vmlinux_path[vmlinux_path__nr_entries]);
2201 vmlinux_path[vmlinux_path__nr_entries] = NULL;
2205 vmlinux_path = NULL;
2208 static int vmlinux_path__init(void)
2213 if (uname(&uts) < 0)
2216 vmlinux_path = malloc(sizeof(char *) * 5);
2217 if (vmlinux_path == NULL)
2220 vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux");
2221 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2223 ++vmlinux_path__nr_entries;
2224 vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux");
2225 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2227 ++vmlinux_path__nr_entries;
2228 snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", uts.release);
2229 vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
2230 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2232 ++vmlinux_path__nr_entries;
2233 snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", uts.release);
2234 vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
2235 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2237 ++vmlinux_path__nr_entries;
2238 snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux",
2240 vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
2241 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2243 ++vmlinux_path__nr_entries;
2248 vmlinux_path__exit();
2252 size_t machine__fprintf_vmlinux_path(struct machine *self, FILE *fp)
2256 struct dso *kdso = self->vmlinux_maps[MAP__FUNCTION]->dso;
2258 if (kdso->has_build_id) {
2259 char filename[PATH_MAX];
2260 if (dso__build_id_filename(kdso, filename, sizeof(filename)))
2261 printed += fprintf(fp, "[0] %s\n", filename);
2264 for (i = 0; i < vmlinux_path__nr_entries; ++i)
2265 printed += fprintf(fp, "[%d] %s\n",
2266 i + kdso->has_build_id, vmlinux_path[i]);
2271 static int setup_list(struct strlist **list, const char *list_str,
2272 const char *list_name)
2274 if (list_str == NULL)
2277 *list = strlist__new(true, list_str);
2279 pr_err("problems parsing %s list\n", list_name);
2285 int symbol__init(void)
2287 if (symbol_conf.initialized)
2290 elf_version(EV_CURRENT);
2291 if (symbol_conf.sort_by_name)
2292 symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) -
2293 sizeof(struct symbol));
2295 if (symbol_conf.try_vmlinux_path && vmlinux_path__init() < 0)
2298 if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') {
2299 pr_err("'.' is the only non valid --field-separator argument\n");
2303 if (setup_list(&symbol_conf.dso_list,
2304 symbol_conf.dso_list_str, "dso") < 0)
2307 if (setup_list(&symbol_conf.comm_list,
2308 symbol_conf.comm_list_str, "comm") < 0)
2309 goto out_free_dso_list;
2311 if (setup_list(&symbol_conf.sym_list,
2312 symbol_conf.sym_list_str, "symbol") < 0)
2313 goto out_free_comm_list;
2315 symbol_conf.initialized = true;
2319 strlist__delete(symbol_conf.dso_list);
2321 strlist__delete(symbol_conf.comm_list);
2325 void symbol__exit(void)
2327 if (!symbol_conf.initialized)
2329 strlist__delete(symbol_conf.sym_list);
2330 strlist__delete(symbol_conf.dso_list);
2331 strlist__delete(symbol_conf.comm_list);
2332 vmlinux_path__exit();
2333 symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL;
2334 symbol_conf.initialized = false;
2337 int machines__create_kernel_maps(struct rb_root *self, pid_t pid)
2339 struct machine *machine = machines__findnew(self, pid);
2341 if (machine == NULL)
2344 return machine__create_kernel_maps(machine);
2347 static int hex(char ch)
2349 if ((ch >= '0') && (ch <= '9'))
2351 if ((ch >= 'a') && (ch <= 'f'))
2352 return ch - 'a' + 10;
2353 if ((ch >= 'A') && (ch <= 'F'))
2354 return ch - 'A' + 10;
2359 * While we find nice hex chars, build a long_val.
2360 * Return number of chars processed.
2362 int hex2u64(const char *ptr, u64 *long_val)
2364 const char *p = ptr;
2368 const int hex_val = hex(*p);
2373 *long_val = (*long_val << 4) | hex_val;
2380 char *strxfrchar(char *s, char from, char to)
2384 while ((p = strchr(p, from)) != NULL)
2390 int machines__create_guest_kernel_maps(struct rb_root *self)
2393 struct dirent **namelist = NULL;
2395 char path[PATH_MAX];
2398 if (symbol_conf.default_guest_vmlinux_name ||
2399 symbol_conf.default_guest_modules ||
2400 symbol_conf.default_guest_kallsyms) {
2401 machines__create_kernel_maps(self, DEFAULT_GUEST_KERNEL_ID);
2404 if (symbol_conf.guestmount) {
2405 items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL);
2408 for (i = 0; i < items; i++) {
2409 if (!isdigit(namelist[i]->d_name[0])) {
2410 /* Filter out . and .. */
2413 pid = atoi(namelist[i]->d_name);
2414 sprintf(path, "%s/%s/proc/kallsyms",
2415 symbol_conf.guestmount,
2416 namelist[i]->d_name);
2417 ret = access(path, R_OK);
2419 pr_debug("Can't access file %s\n", path);
2422 machines__create_kernel_maps(self, pid);
2431 void machines__destroy_guest_kernel_maps(struct rb_root *self)
2433 struct rb_node *next = rb_first(self);
2436 struct machine *pos = rb_entry(next, struct machine, rb_node);
2438 next = rb_next(&pos->rb_node);
2439 rb_erase(&pos->rb_node, self);
2440 machine__delete(pos);
2444 int machine__load_kallsyms(struct machine *self, const char *filename,
2445 enum map_type type, symbol_filter_t filter)
2447 struct map *map = self->vmlinux_maps[type];
2448 int ret = dso__load_kallsyms(map->dso, filename, map, filter);
2451 dso__set_loaded(map->dso, type);
2453 * Since /proc/kallsyms will have multiple sessions for the
2454 * kernel, with modules between them, fixup the end of all
2457 __map_groups__fixup_end(&self->kmaps, type);
2463 int machine__load_vmlinux_path(struct machine *self, enum map_type type,
2464 symbol_filter_t filter)
2466 struct map *map = self->vmlinux_maps[type];
2467 int ret = dso__load_vmlinux_path(map->dso, map, filter);
2470 dso__set_loaded(map->dso, type);
2471 map__reloc_vmlinux(map);