12 #include <sys/utsname.h>
25 static void dsos__add(struct dso *dso);
26 static struct dso *dsos__find(const char *name);
27 static struct map *map__new2(u64 start, struct dso *dso);
28 static void kernel_maps__insert(struct map *map);
29 unsigned int symbol__priv_size;
31 static struct rb_root kernel_maps;
33 static void dso__fixup_sym_end(struct dso *self)
35 struct rb_node *nd, *prevnd = rb_first(&self->syms);
36 struct symbol *curr, *prev;
41 curr = rb_entry(prevnd, struct symbol, rb_node);
43 for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) {
45 curr = rb_entry(nd, struct symbol, rb_node);
47 if (prev->end == prev->start)
48 prev->end = curr->start - 1;
52 if (curr->end == curr->start)
53 curr->end = roundup(curr->start, 4096);
56 static void kernel_maps__fixup_end(void)
58 struct map *prev, *curr;
59 struct rb_node *nd, *prevnd = rb_first(&kernel_maps);
64 curr = rb_entry(prevnd, struct map, rb_node);
66 for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) {
68 curr = rb_entry(nd, struct map, rb_node);
69 prev->end = curr->start - 1;
72 nd = rb_last(&curr->dso->syms);
74 struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
79 static struct symbol *symbol__new(u64 start, u64 len, const char *name)
81 size_t namelen = strlen(name) + 1;
82 struct symbol *self = calloc(1, (symbol__priv_size +
83 sizeof(*self) + namelen));
87 if (symbol__priv_size) {
88 memset(self, 0, symbol__priv_size);
89 self = ((void *)self) + symbol__priv_size;
92 self->end = len ? start + len - 1 : start;
94 pr_debug3("%s: %s %#Lx-%#Lx\n", __func__, name, start, self->end);
96 memcpy(self->name, name, namelen);
101 static void symbol__delete(struct symbol *self)
103 free(((void *)self) - symbol__priv_size);
106 static size_t symbol__fprintf(struct symbol *self, FILE *fp)
108 return fprintf(fp, " %llx-%llx %s\n",
109 self->start, self->end, self->name);
112 struct dso *dso__new(const char *name)
114 struct dso *self = malloc(sizeof(*self) + strlen(name) + 1);
117 strcpy(self->name, name);
118 self->long_name = self->name;
119 self->short_name = self->name;
120 self->syms = RB_ROOT;
121 self->find_symbol = dso__find_symbol;
122 self->slen_calculated = 0;
123 self->origin = DSO__ORIG_NOT_FOUND;
125 self->has_build_id = 0;
131 static void dso__delete_symbols(struct dso *self)
134 struct rb_node *next = rb_first(&self->syms);
137 pos = rb_entry(next, struct symbol, rb_node);
138 next = rb_next(&pos->rb_node);
139 rb_erase(&pos->rb_node, &self->syms);
144 void dso__delete(struct dso *self)
146 dso__delete_symbols(self);
147 if (self->long_name != self->name)
148 free(self->long_name);
152 void dso__set_build_id(struct dso *self, void *build_id)
154 memcpy(self->build_id, build_id, sizeof(self->build_id));
155 self->has_build_id = 1;
158 static void dso__insert_symbol(struct dso *self, struct symbol *sym)
160 struct rb_node **p = &self->syms.rb_node;
161 struct rb_node *parent = NULL;
162 const u64 ip = sym->start;
167 s = rb_entry(parent, struct symbol, rb_node);
173 rb_link_node(&sym->rb_node, parent, p);
174 rb_insert_color(&sym->rb_node, &self->syms);
177 struct symbol *dso__find_symbol(struct dso *self, u64 ip)
184 n = self->syms.rb_node;
187 struct symbol *s = rb_entry(n, struct symbol, rb_node);
191 else if (ip > s->end)
200 int build_id__sprintf(u8 *self, int len, char *bf)
206 for (i = 0; i < len; ++i) {
207 sprintf(bid, "%02x", *raw);
215 size_t dso__fprintf_buildid(struct dso *self, FILE *fp)
217 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
219 build_id__sprintf(self->build_id, sizeof(self->build_id), sbuild_id);
220 return fprintf(fp, "%s", sbuild_id);
223 size_t dso__fprintf(struct dso *self, FILE *fp)
226 size_t ret = fprintf(fp, "dso: %s (", self->short_name);
228 ret += dso__fprintf_buildid(self, fp);
229 ret += fprintf(fp, ")\n");
231 for (nd = rb_first(&self->syms); nd; nd = rb_next(nd)) {
232 struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
233 ret += symbol__fprintf(pos, fp);
240 * Loads the function entries in /proc/kallsyms into kernel_map->dso,
241 * so that we can in the next step set the symbol ->end address and then
242 * call kernel_maps__split_kallsyms.
244 static int kernel_maps__load_all_kallsyms(void)
248 FILE *file = fopen("/proc/kallsyms", "r");
253 while (!feof(file)) {
260 line_len = getline(&line, &n, file);
267 line[--line_len] = '\0'; /* \n */
269 len = hex2u64(line, &start);
272 if (len + 2 >= line_len)
275 symbol_type = toupper(line[len]);
277 * We're interested only in code ('T'ext)
279 if (symbol_type != 'T' && symbol_type != 'W')
282 symbol_name = line + len + 2;
284 * Will fix up the end later, when we have all symbols sorted.
286 sym = symbol__new(start, 0, symbol_name);
289 goto out_delete_line;
292 * We will pass the symbols to the filter later, in
293 * kernel_maps__split_kallsyms, when we have split the
296 dso__insert_symbol(kernel_map->dso, sym);
311 * Split the symbols into maps, making sure there are no overlaps, i.e. the
312 * kernel range is broken in several maps, named [kernel].N, as we don't have
313 * the original ELF section names vmlinux have.
315 static int kernel_maps__split_kallsyms(symbol_filter_t filter, int use_modules)
317 struct map *map = kernel_map;
320 struct rb_node *next = rb_first(&kernel_map->dso->syms);
321 int kernel_range = 0;
326 pos = rb_entry(next, struct symbol, rb_node);
327 next = rb_next(&pos->rb_node);
329 module = strchr(pos->name, '\t');
336 if (strcmp(map->dso->name, module)) {
337 map = kernel_maps__find_by_dso_name(module);
339 pr_err("/proc/{kallsyms,modules} "
345 * So that we look just like we get from .ko files,
346 * i.e. not prelinked, relative to map->start.
348 pos->start = map->map_ip(map, pos->start);
349 pos->end = map->map_ip(map, pos->end);
350 } else if (map != kernel_map) {
351 char dso_name[PATH_MAX];
354 snprintf(dso_name, sizeof(dso_name), "[kernel].%d",
357 dso = dso__new(dso_name);
361 map = map__new2(pos->start, dso);
367 map->map_ip = map->unmap_ip = identity__map_ip;
368 kernel_maps__insert(map);
372 if (filter && filter(map, pos)) {
374 rb_erase(&pos->rb_node, &kernel_map->dso->syms);
377 if (map != kernel_map) {
378 rb_erase(&pos->rb_node, &kernel_map->dso->syms);
379 dso__insert_symbol(map->dso, pos);
389 static int kernel_maps__load_kallsyms(symbol_filter_t filter, int use_modules)
391 if (kernel_maps__load_all_kallsyms())
394 dso__fixup_sym_end(kernel_map->dso);
396 return kernel_maps__split_kallsyms(filter, use_modules);
399 static size_t kernel_maps__fprintf(FILE *fp)
401 size_t printed = fprintf(fp, "Kernel maps:\n");
404 for (nd = rb_first(&kernel_maps); nd; nd = rb_next(nd)) {
405 struct map *pos = rb_entry(nd, struct map, rb_node);
407 printed += fprintf(fp, "Map:");
408 printed += map__fprintf(pos, fp);
410 printed += dso__fprintf(pos->dso, fp);
411 printed += fprintf(fp, "--\n");
415 return printed + fprintf(fp, "END kernel maps\n");
418 static int dso__load_perf_map(struct dso *self, struct map *map,
419 symbol_filter_t filter)
426 file = fopen(self->long_name, "r");
430 while (!feof(file)) {
435 line_len = getline(&line, &n, file);
442 line[--line_len] = '\0'; /* \n */
444 len = hex2u64(line, &start);
447 if (len + 2 >= line_len)
450 len += hex2u64(line + len, &size);
453 if (len + 2 >= line_len)
456 sym = symbol__new(start, size, line + len);
459 goto out_delete_line;
461 if (filter && filter(map, sym))
464 dso__insert_symbol(self, sym);
481 * elf_symtab__for_each_symbol - iterate thru all the symbols
483 * @self: struct elf_symtab instance to iterate
485 * @sym: GElf_Sym iterator
487 #define elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) \
488 for (idx = 0, gelf_getsym(syms, idx, &sym);\
490 idx++, gelf_getsym(syms, idx, &sym))
492 static inline uint8_t elf_sym__type(const GElf_Sym *sym)
494 return GELF_ST_TYPE(sym->st_info);
497 static inline int elf_sym__is_function(const GElf_Sym *sym)
499 return elf_sym__type(sym) == STT_FUNC &&
501 sym->st_shndx != SHN_UNDEF;
504 static inline int elf_sym__is_label(const GElf_Sym *sym)
506 return elf_sym__type(sym) == STT_NOTYPE &&
508 sym->st_shndx != SHN_UNDEF &&
509 sym->st_shndx != SHN_ABS;
512 static inline const char *elf_sec__name(const GElf_Shdr *shdr,
513 const Elf_Data *secstrs)
515 return secstrs->d_buf + shdr->sh_name;
518 static inline int elf_sec__is_text(const GElf_Shdr *shdr,
519 const Elf_Data *secstrs)
521 return strstr(elf_sec__name(shdr, secstrs), "text") != NULL;
524 static inline const char *elf_sym__name(const GElf_Sym *sym,
525 const Elf_Data *symstrs)
527 return symstrs->d_buf + sym->st_name;
530 static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
531 GElf_Shdr *shp, const char *name,
537 while ((sec = elf_nextscn(elf, sec)) != NULL) {
540 gelf_getshdr(sec, shp);
541 str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name);
542 if (!strcmp(name, str)) {
553 #define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \
554 for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \
556 ++idx, pos = gelf_getrel(reldata, idx, &pos_mem))
558 #define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \
559 for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \
561 ++idx, pos = gelf_getrela(reldata, idx, &pos_mem))
564 * We need to check if we have a .dynsym, so that we can handle the
565 * .plt, synthesizing its symbols, that aren't on the symtabs (be it
566 * .dynsym or .symtab).
567 * And always look at the original dso, not at debuginfo packages, that
568 * have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS).
570 static int dso__synthesize_plt_symbols(struct dso *self, struct map *map,
571 symbol_filter_t filter)
573 uint32_t nr_rel_entries, idx;
578 GElf_Shdr shdr_rel_plt, shdr_dynsym;
579 Elf_Data *reldata, *syms, *symstrs;
580 Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym;
583 char sympltname[1024];
585 int nr = 0, symidx, fd, err = 0;
587 fd = open(self->long_name, O_RDONLY);
591 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
595 if (gelf_getehdr(elf, &ehdr) == NULL)
598 scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym,
599 ".dynsym", &dynsym_idx);
600 if (scn_dynsym == NULL)
603 scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,
605 if (scn_plt_rel == NULL) {
606 scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,
608 if (scn_plt_rel == NULL)
614 if (shdr_rel_plt.sh_link != dynsym_idx)
617 if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL)
621 * Fetch the relocation section to find the idxes to the GOT
622 * and the symbols in the .dynsym they refer to.
624 reldata = elf_getdata(scn_plt_rel, NULL);
628 syms = elf_getdata(scn_dynsym, NULL);
632 scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link);
633 if (scn_symstrs == NULL)
636 symstrs = elf_getdata(scn_symstrs, NULL);
640 nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize;
641 plt_offset = shdr_plt.sh_offset;
643 if (shdr_rel_plt.sh_type == SHT_RELA) {
644 GElf_Rela pos_mem, *pos;
646 elf_section__for_each_rela(reldata, pos, pos_mem, idx,
648 symidx = GELF_R_SYM(pos->r_info);
649 plt_offset += shdr_plt.sh_entsize;
650 gelf_getsym(syms, symidx, &sym);
651 snprintf(sympltname, sizeof(sympltname),
652 "%s@plt", elf_sym__name(&sym, symstrs));
654 f = symbol__new(plt_offset, shdr_plt.sh_entsize,
659 if (filter && filter(map, f))
662 dso__insert_symbol(self, f);
666 } else if (shdr_rel_plt.sh_type == SHT_REL) {
667 GElf_Rel pos_mem, *pos;
668 elf_section__for_each_rel(reldata, pos, pos_mem, idx,
670 symidx = GELF_R_SYM(pos->r_info);
671 plt_offset += shdr_plt.sh_entsize;
672 gelf_getsym(syms, symidx, &sym);
673 snprintf(sympltname, sizeof(sympltname),
674 "%s@plt", elf_sym__name(&sym, symstrs));
676 f = symbol__new(plt_offset, shdr_plt.sh_entsize,
681 if (filter && filter(map, f))
684 dso__insert_symbol(self, f);
699 pr_warning("%s: problems reading %s PLT info.\n",
700 __func__, self->long_name);
704 static int dso__load_sym(struct dso *self, struct map *map, const char *name,
705 int fd, symbol_filter_t filter, int kernel,
708 struct map *curr_map = map;
709 struct dso *curr_dso = self;
710 size_t dso_name_len = strlen(self->short_name);
711 Elf_Data *symstrs, *secstrs;
719 Elf_Scn *sec, *sec_strndx;
723 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
725 pr_err("%s: cannot read %s ELF file.\n", __func__, name);
729 if (gelf_getehdr(elf, &ehdr) == NULL) {
730 pr_err("%s: cannot get elf header.\n", __func__);
734 sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL);
736 sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL);
741 syms = elf_getdata(sec, NULL);
745 sec = elf_getscn(elf, shdr.sh_link);
749 symstrs = elf_getdata(sec, NULL);
753 sec_strndx = elf_getscn(elf, ehdr.e_shstrndx);
754 if (sec_strndx == NULL)
757 secstrs = elf_getdata(sec_strndx, NULL);
761 nr_syms = shdr.sh_size / shdr.sh_entsize;
763 memset(&sym, 0, sizeof(sym));
765 self->adjust_symbols = (ehdr.e_type == ET_EXEC ||
766 elf_section_by_name(elf, &ehdr, &shdr,
769 } else self->adjust_symbols = 0;
771 elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) {
773 const char *elf_name;
774 char *demangled = NULL;
775 int is_label = elf_sym__is_label(&sym);
776 const char *section_name;
778 if (!is_label && !elf_sym__is_function(&sym))
781 sec = elf_getscn(elf, sym.st_shndx);
785 gelf_getshdr(sec, &shdr);
787 if (is_label && !elf_sec__is_text(&shdr, secstrs))
790 elf_name = elf_sym__name(&sym, symstrs);
791 section_name = elf_sec__name(&shdr, secstrs);
793 if (kernel || kmodule) {
794 char dso_name[PATH_MAX];
796 if (strcmp(section_name,
797 curr_dso->short_name + dso_name_len) == 0)
800 if (strcmp(section_name, ".text") == 0) {
806 snprintf(dso_name, sizeof(dso_name),
807 "%s%s", self->short_name, section_name);
809 curr_map = kernel_maps__find_by_dso_name(dso_name);
810 if (curr_map == NULL) {
811 u64 start = sym.st_value;
814 start += map->start + shdr.sh_offset;
816 curr_dso = dso__new(dso_name);
817 if (curr_dso == NULL)
819 curr_map = map__new2(start, curr_dso);
820 if (curr_map == NULL) {
821 dso__delete(curr_dso);
824 curr_map->map_ip = identity__map_ip;
825 curr_map->unmap_ip = identity__map_ip;
826 curr_dso->origin = DSO__ORIG_KERNEL;
827 kernel_maps__insert(curr_map);
830 curr_dso = curr_map->dso;
835 if (curr_dso->adjust_symbols) {
836 pr_debug2("adjusting symbol: st_value: %Lx sh_addr: "
837 "%Lx sh_offset: %Lx\n", (u64)sym.st_value,
838 (u64)shdr.sh_addr, (u64)shdr.sh_offset);
839 sym.st_value -= shdr.sh_addr - shdr.sh_offset;
842 * We need to figure out if the object was created from C++ sources
843 * DWARF DW_compile_unit has this, but we don't always have access
846 demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI);
847 if (demangled != NULL)
848 elf_name = demangled;
850 f = symbol__new(sym.st_value, sym.st_size, elf_name);
855 if (filter && filter(curr_map, f))
858 dso__insert_symbol(curr_dso, f);
864 * For misannotated, zeroed, ASM function sizes.
867 dso__fixup_sym_end(self);
875 bool fetch_build_id_table(struct list_head *head)
877 bool have_buildid = false;
880 list_for_each_entry(pos, &dsos, node) {
881 struct build_id_list *new;
882 struct build_id_event b;
885 if (filename__read_build_id(pos->long_name,
887 sizeof(b.build_id)) < 0)
890 memset(&b.header, 0, sizeof(b.header));
891 len = strlen(pos->long_name) + 1;
892 len = ALIGN(len, 64);
893 b.header.size = sizeof(b) + len;
895 new = malloc(sizeof(*new));
899 memcpy(&new->event, &b, sizeof(b));
900 new->dso_name = pos->long_name;
903 list_add_tail(&new->list, head);
909 int filename__read_build_id(const char *filename, void *bf, size_t size)
914 Elf_Data *build_id_data;
918 if (size < BUILD_ID_SIZE)
921 fd = open(filename, O_RDONLY);
925 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
927 pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename);
931 if (gelf_getehdr(elf, &ehdr) == NULL) {
932 pr_err("%s: cannot get elf header.\n", __func__);
936 sec = elf_section_by_name(elf, &ehdr, &shdr,
937 ".note.gnu.build-id", NULL);
941 build_id_data = elf_getdata(sec, NULL);
942 if (build_id_data == NULL)
944 memcpy(bf, build_id_data->d_buf + 16, BUILD_ID_SIZE);
954 static char *dso__read_build_id(struct dso *self)
957 char *build_id = NULL;
958 unsigned char rawbf[BUILD_ID_SIZE];
960 len = filename__read_build_id(self->long_name, rawbf, sizeof(rawbf));
964 build_id = malloc(len * 2 + 1);
965 if (build_id == NULL)
968 build_id__sprintf(rawbf, len, build_id);
973 char dso__symtab_origin(const struct dso *self)
975 static const char origin[] = {
976 [DSO__ORIG_KERNEL] = 'k',
977 [DSO__ORIG_JAVA_JIT] = 'j',
978 [DSO__ORIG_FEDORA] = 'f',
979 [DSO__ORIG_UBUNTU] = 'u',
980 [DSO__ORIG_BUILDID] = 'b',
981 [DSO__ORIG_DSO] = 'd',
982 [DSO__ORIG_KMODULE] = 'K',
985 if (self == NULL || self->origin == DSO__ORIG_NOT_FOUND)
987 return origin[self->origin];
990 int dso__load(struct dso *self, struct map *map, symbol_filter_t filter)
993 char *name = malloc(size), *build_id = NULL;
1002 self->adjust_symbols = 0;
1004 if (strncmp(self->name, "/tmp/perf-", 10) == 0) {
1005 ret = dso__load_perf_map(self, map, filter);
1006 self->origin = ret > 0 ? DSO__ORIG_JAVA_JIT :
1007 DSO__ORIG_NOT_FOUND;
1011 self->origin = DSO__ORIG_FEDORA - 1;
1018 switch (self->origin) {
1019 case DSO__ORIG_FEDORA:
1020 snprintf(name, size, "/usr/lib/debug%s.debug",
1023 case DSO__ORIG_UBUNTU:
1024 snprintf(name, size, "/usr/lib/debug%s",
1027 case DSO__ORIG_BUILDID:
1028 build_id = dso__read_build_id(self);
1029 if (build_id != NULL) {
1030 snprintf(name, size,
1031 "/usr/lib/debug/.build-id/%.2s/%s.debug",
1032 build_id, build_id + 2);
1033 goto compare_build_id;
1038 snprintf(name, size, "%s", self->long_name);
1045 if (self->has_build_id) {
1047 build_id = malloc(BUILD_ID_SIZE);
1048 if (build_id == NULL)
1050 berr = filename__read_build_id(name, build_id,
1053 match = berr > 0 && memcmp(build_id, self->build_id,
1054 sizeof(self->build_id)) == 0;
1061 fd = open(name, O_RDONLY);
1064 ret = dso__load_sym(self, map, name, fd, filter, 0, 0);
1068 * Some people seem to have debuginfo files _WITHOUT_ debug info!?!?
1074 int nr_plt = dso__synthesize_plt_symbols(self, map, filter);
1080 if (ret < 0 && strstr(self->name, " (deleted)") != NULL)
1085 struct map *kernel_map;
1087 static void kernel_maps__insert(struct map *map)
1089 maps__insert(&kernel_maps, map);
1092 struct symbol *kernel_maps__find_symbol(u64 ip, struct map **mapp)
1094 struct map *map = maps__find(&kernel_maps, ip);
1100 ip = map->map_ip(map, ip);
1101 return map->dso->find_symbol(map->dso, ip);
1107 struct map *kernel_maps__find_by_dso_name(const char *name)
1111 for (nd = rb_first(&kernel_maps); nd; nd = rb_next(nd)) {
1112 struct map *map = rb_entry(nd, struct map, rb_node);
1114 if (map->dso && strcmp(map->dso->name, name) == 0)
1121 static int dso__load_module_sym(struct dso *self, struct map *map,
1122 symbol_filter_t filter)
1124 int err = 0, fd = open(self->long_name, O_RDONLY);
1129 pr_err("%s: cannot open %s\n", __func__, self->long_name);
1133 err = dso__load_sym(self, map, self->long_name, fd, filter, 0, 1);
1139 static int dsos__load_modules_sym_dir(char *dirname, symbol_filter_t filter)
1141 struct dirent *dent;
1142 int nr_symbols = 0, err;
1143 DIR *dir = opendir(dirname);
1146 pr_err("%s: cannot open %s dir\n", __func__, dirname);
1150 while ((dent = readdir(dir)) != NULL) {
1151 char path[PATH_MAX];
1153 if (dent->d_type == DT_DIR) {
1154 if (!strcmp(dent->d_name, ".") ||
1155 !strcmp(dent->d_name, ".."))
1158 snprintf(path, sizeof(path), "%s/%s",
1159 dirname, dent->d_name);
1160 err = dsos__load_modules_sym_dir(path, filter);
1164 char *dot = strrchr(dent->d_name, '.'),
1167 struct rb_node *last;
1169 if (dot == NULL || strcmp(dot, ".ko"))
1171 snprintf(dso_name, sizeof(dso_name), "[%.*s]",
1172 (int)(dot - dent->d_name), dent->d_name);
1174 strxfrchar(dso_name, '-', '_');
1175 map = kernel_maps__find_by_dso_name(dso_name);
1179 snprintf(path, sizeof(path), "%s/%s",
1180 dirname, dent->d_name);
1182 map->dso->long_name = strdup(path);
1183 if (map->dso->long_name == NULL)
1186 err = dso__load_module_sym(map->dso, map, filter);
1189 last = rb_last(&map->dso->syms);
1193 * We do this here as well, even having the
1194 * symbol size found in the symtab because
1195 * misannotated ASM symbols may have the size
1198 dso__fixup_sym_end(map->dso);
1200 sym = rb_entry(last, struct symbol, rb_node);
1201 map->end = map->start + sym->end;
1213 static int dsos__load_modules_sym(symbol_filter_t filter)
1216 char modules_path[PATH_MAX];
1218 if (uname(&uts) < 0)
1221 snprintf(modules_path, sizeof(modules_path), "/lib/modules/%s/kernel",
1224 return dsos__load_modules_sym_dir(modules_path, filter);
1228 * Constructor variant for modules (where we know from /proc/modules where
1229 * they are loaded) and for vmlinux, where only after we load all the
1230 * symbols we'll know where it starts and ends.
1232 static struct map *map__new2(u64 start, struct dso *dso)
1234 struct map *self = malloc(sizeof(*self));
1238 * ->end will be filled after we load all the symbols
1240 map__init(self, start, 0, 0, dso);
1246 static int dsos__load_modules(void)
1250 FILE *file = fopen("/proc/modules", "r");
1256 while (!feof(file)) {
1257 char name[PATH_MAX];
1263 line_len = getline(&line, &n, file);
1270 line[--line_len] = '\0'; /* \n */
1272 sep = strrchr(line, 'x');
1276 hex2u64(sep + 1, &start);
1278 sep = strchr(line, ' ');
1284 snprintf(name, sizeof(name), "[%s]", line);
1285 dso = dso__new(name);
1288 goto out_delete_line;
1290 map = map__new2(start, dso);
1293 goto out_delete_line;
1296 dso->origin = DSO__ORIG_KMODULE;
1297 kernel_maps__insert(map);
1312 static int dso__load_vmlinux(struct dso *self, struct map *map,
1313 const char *vmlinux, symbol_filter_t filter)
1315 int err, fd = open(vmlinux, O_RDONLY);
1322 err = dso__load_sym(self, map, self->long_name, fd, filter, 1, 0);
1329 int dsos__load_kernel(const char *vmlinux, symbol_filter_t filter,
1333 struct dso *dso = dso__new(vmlinux);
1338 dso->short_name = "[kernel]";
1339 kernel_map = map__new2(0, dso);
1340 if (kernel_map == NULL)
1341 goto out_delete_dso;
1343 kernel_map->map_ip = kernel_map->unmap_ip = identity__map_ip;
1345 if (use_modules && dsos__load_modules() < 0) {
1346 pr_warning("Failed to load list of modules in use! "
1352 err = dso__load_vmlinux(dso, kernel_map, vmlinux, filter);
1353 if (err > 0 && use_modules) {
1354 int syms = dsos__load_modules_sym(filter);
1357 pr_warning("Failed to read module symbols!"
1358 " Continuing...\n");
1365 err = kernel_maps__load_kallsyms(filter, use_modules);
1368 struct rb_node *node = rb_first(&dso->syms);
1369 struct symbol *sym = rb_entry(node, struct symbol, rb_node);
1371 kernel_map->start = sym->start;
1372 node = rb_last(&dso->syms);
1373 sym = rb_entry(node, struct symbol, rb_node);
1374 kernel_map->end = sym->end;
1376 dso->origin = DSO__ORIG_KERNEL;
1377 kernel_maps__insert(kernel_map);
1379 * Now that we have all sorted out, just set the ->end of all
1382 kernel_maps__fixup_end();
1386 kernel_maps__fprintf(stderr);
1399 const char *vmlinux_name = "vmlinux";
1402 static void dsos__add(struct dso *dso)
1404 list_add_tail(&dso->node, &dsos);
1407 static struct dso *dsos__find(const char *name)
1411 list_for_each_entry(pos, &dsos, node)
1412 if (strcmp(pos->name, name) == 0)
1417 struct dso *dsos__findnew(const char *name)
1419 struct dso *dso = dsos__find(name);
1422 dso = dso__new(name);
1430 void dsos__fprintf(FILE *fp)
1434 list_for_each_entry(pos, &dsos, node)
1435 dso__fprintf(pos, fp);
1438 size_t dsos__fprintf_buildid(FILE *fp)
1443 list_for_each_entry(pos, &dsos, node) {
1444 ret += dso__fprintf_buildid(pos, fp);
1445 ret += fprintf(fp, " %s\n", pos->long_name);
1450 int load_kernel(symbol_filter_t filter)
1452 if (dsos__load_kernel(vmlinux_name, filter, modules) <= 0)
1455 vdso = dso__new("[vdso]");
1464 void symbol__init(unsigned int priv_size)
1466 elf_version(EV_CURRENT);
1467 symbol__priv_size = priv_size;