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, const char *name)
136 size_t namelen = strlen(name) + 1;
137 struct symbol *self = calloc(1, (symbol_conf.priv_size +
138 sizeof(*self) + namelen));
142 if (symbol_conf.priv_size)
143 self = ((void *)self) + symbol_conf.priv_size;
146 self->end = len ? start + len - 1 : start;
147 self->namelen = namelen - 1;
149 pr_debug4("%s: %s %#Lx-%#Lx\n", __func__, name, start, self->end);
151 memcpy(self->name, name, namelen);
156 void symbol__delete(struct symbol *self)
158 free(((void *)self) - symbol_conf.priv_size);
161 static size_t symbol__fprintf(struct symbol *self, FILE *fp)
163 return fprintf(fp, " %llx-%llx %s\n",
164 self->start, self->end, self->name);
167 void dso__set_long_name(struct dso *self, char *name)
171 self->long_name = name;
172 self->long_name_len = strlen(name);
175 static void dso__set_short_name(struct dso *self, const char *name)
179 self->short_name = name;
180 self->short_name_len = strlen(name);
183 static void dso__set_basename(struct dso *self)
185 dso__set_short_name(self, basename(self->long_name));
188 struct dso *dso__new(const char *name)
190 struct dso *self = calloc(1, sizeof(*self) + strlen(name) + 1);
194 strcpy(self->name, name);
195 dso__set_long_name(self, self->name);
196 dso__set_short_name(self, self->name);
197 for (i = 0; i < MAP__NR_TYPES; ++i)
198 self->symbols[i] = self->symbol_names[i] = RB_ROOT;
199 self->slen_calculated = 0;
200 self->origin = DSO__ORIG_NOT_FOUND;
202 self->sorted_by_name = 0;
203 self->has_build_id = 0;
204 self->kernel = DSO_TYPE_USER;
205 INIT_LIST_HEAD(&self->node);
211 static void symbols__delete(struct rb_root *self)
214 struct rb_node *next = rb_first(self);
217 pos = rb_entry(next, struct symbol, rb_node);
218 next = rb_next(&pos->rb_node);
219 rb_erase(&pos->rb_node, self);
224 void dso__delete(struct dso *self)
227 for (i = 0; i < MAP__NR_TYPES; ++i)
228 symbols__delete(&self->symbols[i]);
229 if (self->sname_alloc)
230 free((char *)self->short_name);
231 if (self->lname_alloc)
232 free(self->long_name);
236 void dso__set_build_id(struct dso *self, void *build_id)
238 memcpy(self->build_id, build_id, sizeof(self->build_id));
239 self->has_build_id = 1;
242 static void symbols__insert(struct rb_root *self, struct symbol *sym)
244 struct rb_node **p = &self->rb_node;
245 struct rb_node *parent = NULL;
246 const u64 ip = sym->start;
251 s = rb_entry(parent, struct symbol, rb_node);
257 rb_link_node(&sym->rb_node, parent, p);
258 rb_insert_color(&sym->rb_node, self);
261 static struct symbol *symbols__find(struct rb_root *self, u64 ip)
271 struct symbol *s = rb_entry(n, struct symbol, rb_node);
275 else if (ip > s->end)
284 struct symbol_name_rb_node {
285 struct rb_node rb_node;
289 static void symbols__insert_by_name(struct rb_root *self, struct symbol *sym)
291 struct rb_node **p = &self->rb_node;
292 struct rb_node *parent = NULL;
293 struct symbol_name_rb_node *symn = ((void *)sym) - sizeof(*parent), *s;
297 s = rb_entry(parent, struct symbol_name_rb_node, rb_node);
298 if (strcmp(sym->name, s->sym.name) < 0)
303 rb_link_node(&symn->rb_node, parent, p);
304 rb_insert_color(&symn->rb_node, self);
307 static void symbols__sort_by_name(struct rb_root *self, struct rb_root *source)
311 for (nd = rb_first(source); nd; nd = rb_next(nd)) {
312 struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
313 symbols__insert_by_name(self, pos);
317 static struct symbol *symbols__find_by_name(struct rb_root *self, const char *name)
327 struct symbol_name_rb_node *s;
330 s = rb_entry(n, struct symbol_name_rb_node, rb_node);
331 cmp = strcmp(name, s->sym.name);
344 struct symbol *dso__find_symbol(struct dso *self,
345 enum map_type type, u64 addr)
347 return symbols__find(&self->symbols[type], addr);
350 struct symbol *dso__find_symbol_by_name(struct dso *self, enum map_type type,
353 return symbols__find_by_name(&self->symbol_names[type], name);
356 void dso__sort_by_name(struct dso *self, enum map_type type)
358 dso__set_sorted_by_name(self, type);
359 return symbols__sort_by_name(&self->symbol_names[type],
360 &self->symbols[type]);
363 int build_id__sprintf(const u8 *self, int len, char *bf)
366 const u8 *raw = self;
369 for (i = 0; i < len; ++i) {
370 sprintf(bid, "%02x", *raw);
378 size_t dso__fprintf_buildid(struct dso *self, FILE *fp)
380 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
382 build_id__sprintf(self->build_id, sizeof(self->build_id), sbuild_id);
383 return fprintf(fp, "%s", sbuild_id);
386 size_t dso__fprintf(struct dso *self, enum map_type type, FILE *fp)
389 size_t ret = fprintf(fp, "dso: %s (", self->short_name);
391 if (self->short_name != self->long_name)
392 ret += fprintf(fp, "%s, ", self->long_name);
393 ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type],
394 self->loaded ? "" : "NOT ");
395 ret += dso__fprintf_buildid(self, fp);
396 ret += fprintf(fp, ")\n");
397 for (nd = rb_first(&self->symbols[type]); nd; nd = rb_next(nd)) {
398 struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
399 ret += symbol__fprintf(pos, fp);
405 int kallsyms__parse(const char *filename, void *arg,
406 int (*process_symbol)(void *arg, const char *name,
407 char type, u64 start))
412 FILE *file = fopen(filename, "r");
417 while (!feof(file)) {
423 line_len = getline(&line, &n, file);
424 if (line_len < 0 || !line)
427 line[--line_len] = '\0'; /* \n */
429 len = hex2u64(line, &start);
432 if (len + 2 >= line_len)
435 symbol_type = toupper(line[len]);
436 symbol_name = line + len + 2;
438 err = process_symbol(arg, symbol_name, symbol_type, start);
451 struct process_kallsyms_args {
456 static int map__process_kallsym_symbol(void *arg, const char *name,
457 char type, u64 start)
460 struct process_kallsyms_args *a = arg;
461 struct rb_root *root = &a->dso->symbols[a->map->type];
463 if (!symbol_type__is_a(type, a->map->type))
467 * Will fix up the end later, when we have all symbols sorted.
469 sym = symbol__new(start, 0, name);
474 * We will pass the symbols to the filter later, in
475 * map__split_kallsyms, when we have split the maps per module
477 symbols__insert(root, sym);
483 * Loads the function entries in /proc/kallsyms into kernel_map->dso,
484 * so that we can in the next step set the symbol ->end address and then
485 * call kernel_maps__split_kallsyms.
487 static int dso__load_all_kallsyms(struct dso *self, const char *filename,
490 struct process_kallsyms_args args = { .map = map, .dso = self, };
491 return kallsyms__parse(filename, &args, map__process_kallsym_symbol);
495 * Split the symbols into maps, making sure there are no overlaps, i.e. the
496 * kernel range is broken in several maps, named [kernel].N, as we don't have
497 * the original ELF section names vmlinux have.
499 static int dso__split_kallsyms(struct dso *self, struct map *map,
500 symbol_filter_t filter)
502 struct map_groups *kmaps = map__kmap(map)->kmaps;
503 struct machine *machine = kmaps->machine;
504 struct map *curr_map = map;
507 struct rb_root *root = &self->symbols[map->type];
508 struct rb_node *next = rb_first(root);
509 int kernel_range = 0;
514 pos = rb_entry(next, struct symbol, rb_node);
515 next = rb_next(&pos->rb_node);
517 module = strchr(pos->name, '\t');
519 if (!symbol_conf.use_modules)
524 if (strcmp(curr_map->dso->short_name, module)) {
525 if (curr_map != map &&
526 self->kernel == DSO_TYPE_GUEST_KERNEL &&
527 machine__is_default_guest(machine)) {
529 * We assume all symbols of a module are
530 * continuous in * kallsyms, so curr_map
531 * points to a module and all its
532 * symbols are in its kmap. Mark it as
535 dso__set_loaded(curr_map->dso,
539 curr_map = map_groups__find_by_name(kmaps,
541 if (curr_map == NULL) {
542 pr_debug("%s/proc/{kallsyms,modules} "
543 "inconsistency while looking "
544 "for \"%s\" module!\n",
545 machine->root_dir, module);
550 if (curr_map->dso->loaded &&
551 !machine__is_default_guest(machine))
555 * So that we look just like we get from .ko files,
556 * i.e. not prelinked, relative to map->start.
558 pos->start = curr_map->map_ip(curr_map, pos->start);
559 pos->end = curr_map->map_ip(curr_map, pos->end);
560 } else if (curr_map != map) {
561 char dso_name[PATH_MAX];
564 if (self->kernel == DSO_TYPE_GUEST_KERNEL)
565 snprintf(dso_name, sizeof(dso_name),
569 snprintf(dso_name, sizeof(dso_name),
573 dso = dso__new(dso_name);
577 dso->kernel = self->kernel;
579 curr_map = map__new2(pos->start, dso, map->type);
580 if (curr_map == NULL) {
585 curr_map->map_ip = curr_map->unmap_ip = identity__map_ip;
586 map_groups__insert(kmaps, curr_map);
590 if (filter && filter(curr_map, pos)) {
591 discard_symbol: rb_erase(&pos->rb_node, root);
594 if (curr_map != map) {
595 rb_erase(&pos->rb_node, root);
596 symbols__insert(&curr_map->dso->symbols[curr_map->type], pos);
602 if (curr_map != map &&
603 self->kernel == DSO_TYPE_GUEST_KERNEL &&
604 machine__is_default_guest(kmaps->machine)) {
605 dso__set_loaded(curr_map->dso, curr_map->type);
611 int dso__load_kallsyms(struct dso *self, const char *filename,
612 struct map *map, symbol_filter_t filter)
614 if (dso__load_all_kallsyms(self, filename, map) < 0)
617 symbols__fixup_end(&self->symbols[map->type]);
618 if (self->kernel == DSO_TYPE_GUEST_KERNEL)
619 self->origin = DSO__ORIG_GUEST_KERNEL;
621 self->origin = DSO__ORIG_KERNEL;
623 return dso__split_kallsyms(self, map, filter);
626 static int dso__load_perf_map(struct dso *self, struct map *map,
627 symbol_filter_t filter)
634 file = fopen(self->long_name, "r");
638 while (!feof(file)) {
643 line_len = getline(&line, &n, file);
650 line[--line_len] = '\0'; /* \n */
652 len = hex2u64(line, &start);
655 if (len + 2 >= line_len)
658 len += hex2u64(line + len, &size);
661 if (len + 2 >= line_len)
664 sym = symbol__new(start, size, line + len);
667 goto out_delete_line;
669 if (filter && filter(map, sym))
672 symbols__insert(&self->symbols[map->type], sym);
689 * elf_symtab__for_each_symbol - iterate thru all the symbols
691 * @self: struct elf_symtab instance to iterate
693 * @sym: GElf_Sym iterator
695 #define elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) \
696 for (idx = 0, gelf_getsym(syms, idx, &sym);\
698 idx++, gelf_getsym(syms, idx, &sym))
700 static inline uint8_t elf_sym__type(const GElf_Sym *sym)
702 return GELF_ST_TYPE(sym->st_info);
705 static inline int elf_sym__is_function(const GElf_Sym *sym)
707 return elf_sym__type(sym) == STT_FUNC &&
709 sym->st_shndx != SHN_UNDEF;
712 static inline bool elf_sym__is_object(const GElf_Sym *sym)
714 return elf_sym__type(sym) == STT_OBJECT &&
716 sym->st_shndx != SHN_UNDEF;
719 static inline int elf_sym__is_label(const GElf_Sym *sym)
721 return elf_sym__type(sym) == STT_NOTYPE &&
723 sym->st_shndx != SHN_UNDEF &&
724 sym->st_shndx != SHN_ABS;
727 static inline const char *elf_sec__name(const GElf_Shdr *shdr,
728 const Elf_Data *secstrs)
730 return secstrs->d_buf + shdr->sh_name;
733 static inline int elf_sec__is_text(const GElf_Shdr *shdr,
734 const Elf_Data *secstrs)
736 return strstr(elf_sec__name(shdr, secstrs), "text") != NULL;
739 static inline bool elf_sec__is_data(const GElf_Shdr *shdr,
740 const Elf_Data *secstrs)
742 return strstr(elf_sec__name(shdr, secstrs), "data") != NULL;
745 static inline const char *elf_sym__name(const GElf_Sym *sym,
746 const Elf_Data *symstrs)
748 return symstrs->d_buf + sym->st_name;
751 static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
752 GElf_Shdr *shp, const char *name,
758 while ((sec = elf_nextscn(elf, sec)) != NULL) {
761 gelf_getshdr(sec, shp);
762 str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name);
763 if (!strcmp(name, str)) {
774 #define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \
775 for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \
777 ++idx, pos = gelf_getrel(reldata, idx, &pos_mem))
779 #define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \
780 for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \
782 ++idx, pos = gelf_getrela(reldata, idx, &pos_mem))
785 * We need to check if we have a .dynsym, so that we can handle the
786 * .plt, synthesizing its symbols, that aren't on the symtabs (be it
787 * .dynsym or .symtab).
788 * And always look at the original dso, not at debuginfo packages, that
789 * have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS).
791 static int dso__synthesize_plt_symbols(struct dso *self, struct map *map,
792 symbol_filter_t filter)
794 uint32_t nr_rel_entries, idx;
799 GElf_Shdr shdr_rel_plt, shdr_dynsym;
800 Elf_Data *reldata, *syms, *symstrs;
801 Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym;
804 char sympltname[1024];
806 int nr = 0, symidx, fd, err = 0;
808 fd = open(self->long_name, O_RDONLY);
812 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
816 if (gelf_getehdr(elf, &ehdr) == NULL)
819 scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym,
820 ".dynsym", &dynsym_idx);
821 if (scn_dynsym == NULL)
824 scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,
826 if (scn_plt_rel == NULL) {
827 scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,
829 if (scn_plt_rel == NULL)
835 if (shdr_rel_plt.sh_link != dynsym_idx)
838 if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL)
842 * Fetch the relocation section to find the idxes to the GOT
843 * and the symbols in the .dynsym they refer to.
845 reldata = elf_getdata(scn_plt_rel, NULL);
849 syms = elf_getdata(scn_dynsym, NULL);
853 scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link);
854 if (scn_symstrs == NULL)
857 symstrs = elf_getdata(scn_symstrs, NULL);
861 nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize;
862 plt_offset = shdr_plt.sh_offset;
864 if (shdr_rel_plt.sh_type == SHT_RELA) {
865 GElf_Rela pos_mem, *pos;
867 elf_section__for_each_rela(reldata, pos, pos_mem, idx,
869 symidx = GELF_R_SYM(pos->r_info);
870 plt_offset += shdr_plt.sh_entsize;
871 gelf_getsym(syms, symidx, &sym);
872 snprintf(sympltname, sizeof(sympltname),
873 "%s@plt", elf_sym__name(&sym, symstrs));
875 f = symbol__new(plt_offset, shdr_plt.sh_entsize,
880 if (filter && filter(map, f))
883 symbols__insert(&self->symbols[map->type], f);
887 } else if (shdr_rel_plt.sh_type == SHT_REL) {
888 GElf_Rel pos_mem, *pos;
889 elf_section__for_each_rel(reldata, pos, pos_mem, idx,
891 symidx = GELF_R_SYM(pos->r_info);
892 plt_offset += shdr_plt.sh_entsize;
893 gelf_getsym(syms, symidx, &sym);
894 snprintf(sympltname, sizeof(sympltname),
895 "%s@plt", elf_sym__name(&sym, symstrs));
897 f = symbol__new(plt_offset, shdr_plt.sh_entsize,
902 if (filter && filter(map, f))
905 symbols__insert(&self->symbols[map->type], f);
920 pr_debug("%s: problems reading %s PLT info.\n",
921 __func__, self->long_name);
925 static bool elf_sym__is_a(GElf_Sym *self, enum map_type type)
929 return elf_sym__is_function(self);
931 return elf_sym__is_object(self);
937 static bool elf_sec__is_a(GElf_Shdr *self, Elf_Data *secstrs, enum map_type type)
941 return elf_sec__is_text(self, secstrs);
943 return elf_sec__is_data(self, secstrs);
949 static size_t elf_addr_to_index(Elf *elf, GElf_Addr addr)
955 while ((sec = elf_nextscn(elf, sec)) != NULL) {
956 gelf_getshdr(sec, &shdr);
958 if ((addr >= shdr.sh_addr) &&
959 (addr < (shdr.sh_addr + shdr.sh_size)))
968 static int dso__load_sym(struct dso *self, struct map *map, const char *name,
969 int fd, symbol_filter_t filter, int kmodule,
972 struct kmap *kmap = self->kernel ? map__kmap(map) : NULL;
973 struct map *curr_map = map;
974 struct dso *curr_dso = self;
975 Elf_Data *symstrs, *secstrs;
980 GElf_Shdr shdr, opdshdr;
981 Elf_Data *syms, *opddata = NULL;
983 Elf_Scn *sec, *sec_strndx, *opdsec;
988 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
990 pr_debug("%s: cannot read %s ELF file.\n", __func__, name);
994 if (gelf_getehdr(elf, &ehdr) == NULL) {
995 pr_debug("%s: cannot get elf header.\n", __func__);
999 /* Always reject images with a mismatched build-id: */
1000 if (self->has_build_id) {
1001 u8 build_id[BUILD_ID_SIZE];
1003 if (elf_read_build_id(elf, build_id,
1004 BUILD_ID_SIZE) != BUILD_ID_SIZE)
1007 if (!dso__build_id_equal(self, build_id))
1011 sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL);
1016 sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL);
1021 opdsec = elf_section_by_name(elf, &ehdr, &opdshdr, ".opd", &opdidx);
1023 opddata = elf_rawdata(opdsec, NULL);
1025 syms = elf_getdata(sec, NULL);
1029 sec = elf_getscn(elf, shdr.sh_link);
1033 symstrs = elf_getdata(sec, NULL);
1034 if (symstrs == NULL)
1037 sec_strndx = elf_getscn(elf, ehdr.e_shstrndx);
1038 if (sec_strndx == NULL)
1041 secstrs = elf_getdata(sec_strndx, NULL);
1042 if (secstrs == NULL)
1045 nr_syms = shdr.sh_size / shdr.sh_entsize;
1047 memset(&sym, 0, sizeof(sym));
1048 if (self->kernel == DSO_TYPE_USER) {
1049 self->adjust_symbols = (ehdr.e_type == ET_EXEC ||
1050 elf_section_by_name(elf, &ehdr, &shdr,
1051 ".gnu.prelink_undo",
1053 } else self->adjust_symbols = 0;
1055 elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) {
1057 const char *elf_name = elf_sym__name(&sym, symstrs);
1058 char *demangled = NULL;
1059 int is_label = elf_sym__is_label(&sym);
1060 const char *section_name;
1062 if (kmap && kmap->ref_reloc_sym && kmap->ref_reloc_sym->name &&
1063 strcmp(elf_name, kmap->ref_reloc_sym->name) == 0)
1064 kmap->ref_reloc_sym->unrelocated_addr = sym.st_value;
1066 if (!is_label && !elf_sym__is_a(&sym, map->type))
1069 if (opdsec && sym.st_shndx == opdidx) {
1070 u32 offset = sym.st_value - opdshdr.sh_addr;
1071 u64 *opd = opddata->d_buf + offset;
1072 sym.st_value = *opd;
1073 sym.st_shndx = elf_addr_to_index(elf, sym.st_value);
1076 sec = elf_getscn(elf, sym.st_shndx);
1080 gelf_getshdr(sec, &shdr);
1082 if (is_label && !elf_sec__is_a(&shdr, secstrs, map->type))
1085 section_name = elf_sec__name(&shdr, secstrs);
1087 if (self->kernel != DSO_TYPE_USER || kmodule) {
1088 char dso_name[PATH_MAX];
1090 if (strcmp(section_name,
1091 (curr_dso->short_name +
1092 self->short_name_len)) == 0)
1095 if (strcmp(section_name, ".text") == 0) {
1101 snprintf(dso_name, sizeof(dso_name),
1102 "%s%s", self->short_name, section_name);
1104 curr_map = map_groups__find_by_name(kmap->kmaps, map->type, dso_name);
1105 if (curr_map == NULL) {
1106 u64 start = sym.st_value;
1109 start += map->start + shdr.sh_offset;
1111 curr_dso = dso__new(dso_name);
1112 if (curr_dso == NULL)
1114 curr_dso->kernel = self->kernel;
1115 curr_map = map__new2(start, curr_dso,
1117 if (curr_map == NULL) {
1118 dso__delete(curr_dso);
1121 curr_map->map_ip = identity__map_ip;
1122 curr_map->unmap_ip = identity__map_ip;
1123 curr_dso->origin = self->origin;
1124 map_groups__insert(kmap->kmaps, curr_map);
1125 dsos__add(&self->node, curr_dso);
1126 dso__set_loaded(curr_dso, map->type);
1128 curr_dso = curr_map->dso;
1133 if (curr_dso->adjust_symbols) {
1134 pr_debug4("%s: adjusting symbol: st_value: %#Lx "
1135 "sh_addr: %#Lx sh_offset: %#Lx\n", __func__,
1136 (u64)sym.st_value, (u64)shdr.sh_addr,
1137 (u64)shdr.sh_offset);
1138 sym.st_value -= shdr.sh_addr - shdr.sh_offset;
1141 * We need to figure out if the object was created from C++ sources
1142 * DWARF DW_compile_unit has this, but we don't always have access
1145 demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI);
1146 if (demangled != NULL)
1147 elf_name = demangled;
1149 f = symbol__new(sym.st_value, sym.st_size, elf_name);
1154 if (filter && filter(curr_map, f))
1157 symbols__insert(&curr_dso->symbols[curr_map->type], f);
1163 * For misannotated, zeroed, ASM function sizes.
1166 symbols__fixup_end(&self->symbols[map->type]);
1169 * We need to fixup this here too because we create new
1170 * maps here, for things like vsyscall sections.
1172 __map_groups__fixup_end(kmap->kmaps, map->type);
1182 static bool dso__build_id_equal(const struct dso *self, u8 *build_id)
1184 return memcmp(self->build_id, build_id, sizeof(self->build_id)) == 0;
1187 bool __dsos__read_build_ids(struct list_head *head, bool with_hits)
1189 bool have_build_id = false;
1192 list_for_each_entry(pos, head, node) {
1193 if (with_hits && !pos->hit)
1195 if (pos->has_build_id) {
1196 have_build_id = true;
1199 if (filename__read_build_id(pos->long_name, pos->build_id,
1200 sizeof(pos->build_id)) > 0) {
1201 have_build_id = true;
1202 pos->has_build_id = true;
1206 return have_build_id;
1210 * Align offset to 4 bytes as needed for note name and descriptor data.
1212 #define NOTE_ALIGN(n) (((n) + 3) & -4U)
1214 static int elf_read_build_id(Elf *elf, void *bf, size_t size)
1224 if (size < BUILD_ID_SIZE)
1228 if (ek != ELF_K_ELF)
1231 if (gelf_getehdr(elf, &ehdr) == NULL) {
1232 pr_err("%s: cannot get elf header.\n", __func__);
1236 sec = elf_section_by_name(elf, &ehdr, &shdr,
1237 ".note.gnu.build-id", NULL);
1239 sec = elf_section_by_name(elf, &ehdr, &shdr,
1245 data = elf_getdata(sec, NULL);
1250 while (ptr < (data->d_buf + data->d_size)) {
1251 GElf_Nhdr *nhdr = ptr;
1252 int namesz = NOTE_ALIGN(nhdr->n_namesz),
1253 descsz = NOTE_ALIGN(nhdr->n_descsz);
1256 ptr += sizeof(*nhdr);
1259 if (nhdr->n_type == NT_GNU_BUILD_ID &&
1260 nhdr->n_namesz == sizeof("GNU")) {
1261 if (memcmp(name, "GNU", sizeof("GNU")) == 0) {
1262 memcpy(bf, ptr, BUILD_ID_SIZE);
1263 err = BUILD_ID_SIZE;
1274 int filename__read_build_id(const char *filename, void *bf, size_t size)
1279 if (size < BUILD_ID_SIZE)
1282 fd = open(filename, O_RDONLY);
1286 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
1288 pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename);
1292 err = elf_read_build_id(elf, bf, size);
1301 int sysfs__read_build_id(const char *filename, void *build_id, size_t size)
1305 if (size < BUILD_ID_SIZE)
1308 fd = open(filename, O_RDONLY);
1317 if (read(fd, &nhdr, sizeof(nhdr)) != sizeof(nhdr))
1320 namesz = NOTE_ALIGN(nhdr.n_namesz);
1321 descsz = NOTE_ALIGN(nhdr.n_descsz);
1322 if (nhdr.n_type == NT_GNU_BUILD_ID &&
1323 nhdr.n_namesz == sizeof("GNU")) {
1324 if (read(fd, bf, namesz) != namesz)
1326 if (memcmp(bf, "GNU", sizeof("GNU")) == 0) {
1327 if (read(fd, build_id,
1328 BUILD_ID_SIZE) == BUILD_ID_SIZE) {
1332 } else if (read(fd, bf, descsz) != descsz)
1335 int n = namesz + descsz;
1336 if (read(fd, bf, n) != n)
1345 char dso__symtab_origin(const struct dso *self)
1347 static const char origin[] = {
1348 [DSO__ORIG_KERNEL] = 'k',
1349 [DSO__ORIG_JAVA_JIT] = 'j',
1350 [DSO__ORIG_BUILD_ID_CACHE] = 'B',
1351 [DSO__ORIG_FEDORA] = 'f',
1352 [DSO__ORIG_UBUNTU] = 'u',
1353 [DSO__ORIG_BUILDID] = 'b',
1354 [DSO__ORIG_DSO] = 'd',
1355 [DSO__ORIG_KMODULE] = 'K',
1356 [DSO__ORIG_GUEST_KERNEL] = 'g',
1357 [DSO__ORIG_GUEST_KMODULE] = 'G',
1360 if (self == NULL || self->origin == DSO__ORIG_NOT_FOUND)
1362 return origin[self->origin];
1365 int dso__load(struct dso *self, struct map *map, symbol_filter_t filter)
1367 int size = PATH_MAX;
1371 struct machine *machine;
1372 const char *root_dir;
1375 dso__set_loaded(self, map->type);
1377 if (self->kernel == DSO_TYPE_KERNEL)
1378 return dso__load_kernel_sym(self, map, filter);
1379 else if (self->kernel == DSO_TYPE_GUEST_KERNEL)
1380 return dso__load_guest_kernel_sym(self, map, filter);
1382 if (map->groups && map->groups->machine)
1383 machine = map->groups->machine;
1387 name = malloc(size);
1391 self->adjust_symbols = 0;
1393 if (strncmp(self->name, "/tmp/perf-", 10) == 0) {
1394 ret = dso__load_perf_map(self, map, filter);
1395 self->origin = ret > 0 ? DSO__ORIG_JAVA_JIT :
1396 DSO__ORIG_NOT_FOUND;
1400 /* Iterate over candidate debug images.
1401 * On the first pass, only load images if they have a full symtab.
1402 * Failing that, do a second pass where we accept .dynsym also
1404 for (self->origin = DSO__ORIG_BUILD_ID_CACHE, want_symtab = 1;
1405 self->origin != DSO__ORIG_NOT_FOUND;
1407 switch (self->origin) {
1408 case DSO__ORIG_BUILD_ID_CACHE:
1409 if (dso__build_id_filename(self, name, size) == NULL)
1412 case DSO__ORIG_FEDORA:
1413 snprintf(name, size, "/usr/lib/debug%s.debug",
1416 case DSO__ORIG_UBUNTU:
1417 snprintf(name, size, "/usr/lib/debug%s",
1420 case DSO__ORIG_BUILDID: {
1421 char build_id_hex[BUILD_ID_SIZE * 2 + 1];
1423 if (!self->has_build_id)
1426 build_id__sprintf(self->build_id,
1427 sizeof(self->build_id),
1429 snprintf(name, size,
1430 "/usr/lib/debug/.build-id/%.2s/%s.debug",
1431 build_id_hex, build_id_hex + 2);
1435 snprintf(name, size, "%s", self->long_name);
1437 case DSO__ORIG_GUEST_KMODULE:
1438 if (map->groups && map->groups->machine)
1439 root_dir = map->groups->machine->root_dir;
1442 snprintf(name, size, "%s%s", root_dir, self->long_name);
1447 * If we wanted a full symtab but no image had one,
1448 * relax our requirements and repeat the search.
1452 self->origin = DSO__ORIG_BUILD_ID_CACHE;
1457 /* Name is now the name of the next image to try */
1458 fd = open(name, O_RDONLY);
1462 ret = dso__load_sym(self, map, name, fd, filter, 0,
1467 * Some people seem to have debuginfo files _WITHOUT_ debug
1474 int nr_plt = dso__synthesize_plt_symbols(self, map, filter);
1482 if (ret < 0 && strstr(self->name, " (deleted)") != NULL)
1487 struct map *map_groups__find_by_name(struct map_groups *self,
1488 enum map_type type, const char *name)
1492 for (nd = rb_first(&self->maps[type]); nd; nd = rb_next(nd)) {
1493 struct map *map = rb_entry(nd, struct map, rb_node);
1495 if (map->dso && strcmp(map->dso->short_name, name) == 0)
1502 static int dso__kernel_module_get_build_id(struct dso *self,
1503 const char *root_dir)
1505 char filename[PATH_MAX];
1507 * kernel module short names are of the form "[module]" and
1508 * we need just "module" here.
1510 const char *name = self->short_name + 1;
1512 snprintf(filename, sizeof(filename),
1513 "%s/sys/module/%.*s/notes/.note.gnu.build-id",
1514 root_dir, (int)strlen(name) - 1, name);
1516 if (sysfs__read_build_id(filename, self->build_id,
1517 sizeof(self->build_id)) == 0)
1518 self->has_build_id = true;
1523 static int map_groups__set_modules_path_dir(struct map_groups *self,
1524 const char *dir_name)
1526 struct dirent *dent;
1527 DIR *dir = opendir(dir_name);
1531 pr_debug("%s: cannot open %s dir\n", __func__, dir_name);
1535 while ((dent = readdir(dir)) != NULL) {
1536 char path[PATH_MAX];
1539 /*sshfs might return bad dent->d_type, so we have to stat*/
1540 sprintf(path, "%s/%s", dir_name, dent->d_name);
1541 if (stat(path, &st))
1544 if (S_ISDIR(st.st_mode)) {
1545 if (!strcmp(dent->d_name, ".") ||
1546 !strcmp(dent->d_name, ".."))
1549 snprintf(path, sizeof(path), "%s/%s",
1550 dir_name, dent->d_name);
1551 ret = map_groups__set_modules_path_dir(self, path);
1555 char *dot = strrchr(dent->d_name, '.'),
1560 if (dot == NULL || strcmp(dot, ".ko"))
1562 snprintf(dso_name, sizeof(dso_name), "[%.*s]",
1563 (int)(dot - dent->d_name), dent->d_name);
1565 strxfrchar(dso_name, '-', '_');
1566 map = map_groups__find_by_name(self, MAP__FUNCTION, dso_name);
1570 snprintf(path, sizeof(path), "%s/%s",
1571 dir_name, dent->d_name);
1573 long_name = strdup(path);
1574 if (long_name == NULL) {
1578 dso__set_long_name(map->dso, long_name);
1579 map->dso->lname_alloc = 1;
1580 dso__kernel_module_get_build_id(map->dso, "");
1589 static char *get_kernel_version(const char *root_dir)
1591 char version[PATH_MAX];
1594 const char *prefix = "Linux version ";
1596 sprintf(version, "%s/proc/version", root_dir);
1597 file = fopen(version, "r");
1602 tmp = fgets(version, sizeof(version), file);
1605 name = strstr(version, prefix);
1608 name += strlen(prefix);
1609 tmp = strchr(name, ' ');
1613 return strdup(name);
1616 static int machine__set_modules_path(struct machine *self)
1619 char modules_path[PATH_MAX];
1621 version = get_kernel_version(self->root_dir);
1625 snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s/kernel",
1626 self->root_dir, version);
1629 return map_groups__set_modules_path_dir(&self->kmaps, modules_path);
1633 * Constructor variant for modules (where we know from /proc/modules where
1634 * they are loaded) and for vmlinux, where only after we load all the
1635 * symbols we'll know where it starts and ends.
1637 static struct map *map__new2(u64 start, struct dso *dso, enum map_type type)
1639 struct map *self = calloc(1, (sizeof(*self) +
1640 (dso->kernel ? sizeof(struct kmap) : 0)));
1643 * ->end will be filled after we load all the symbols
1645 map__init(self, type, start, 0, 0, dso);
1651 struct map *machine__new_module(struct machine *self, u64 start,
1652 const char *filename)
1655 struct dso *dso = __dsos__findnew(&self->kernel_dsos, filename);
1660 map = map__new2(start, dso, MAP__FUNCTION);
1664 if (machine__is_host(self))
1665 dso->origin = DSO__ORIG_KMODULE;
1667 dso->origin = DSO__ORIG_GUEST_KMODULE;
1668 map_groups__insert(&self->kmaps, map);
1672 static int machine__create_modules(struct machine *self)
1678 const char *modules;
1679 char path[PATH_MAX];
1681 if (machine__is_default_guest(self))
1682 modules = symbol_conf.default_guest_modules;
1684 sprintf(path, "%s/proc/modules", self->root_dir);
1688 file = fopen(modules, "r");
1692 while (!feof(file)) {
1693 char name[PATH_MAX];
1698 line_len = getline(&line, &n, file);
1705 line[--line_len] = '\0'; /* \n */
1707 sep = strrchr(line, 'x');
1711 hex2u64(sep + 1, &start);
1713 sep = strchr(line, ' ');
1719 snprintf(name, sizeof(name), "[%s]", line);
1720 map = machine__new_module(self, start, name);
1722 goto out_delete_line;
1723 dso__kernel_module_get_build_id(map->dso, self->root_dir);
1729 return machine__set_modules_path(self);
1737 static int dso__load_vmlinux(struct dso *self, struct map *map,
1738 const char *vmlinux, symbol_filter_t filter)
1742 fd = open(vmlinux, O_RDONLY);
1746 dso__set_loaded(self, map->type);
1747 err = dso__load_sym(self, map, vmlinux, fd, filter, 0, 0);
1751 pr_debug("Using %s for symbols\n", vmlinux);
1756 int dso__load_vmlinux_path(struct dso *self, struct map *map,
1757 symbol_filter_t filter)
1762 pr_debug("Looking at the vmlinux_path (%d entries long)\n",
1763 vmlinux_path__nr_entries + 1);
1765 filename = dso__build_id_filename(self, NULL, 0);
1766 if (filename != NULL) {
1767 err = dso__load_vmlinux(self, map, filename, filter);
1769 dso__set_long_name(self, filename);
1775 for (i = 0; i < vmlinux_path__nr_entries; ++i) {
1776 err = dso__load_vmlinux(self, map, vmlinux_path[i], filter);
1778 dso__set_long_name(self, strdup(vmlinux_path[i]));
1786 static int dso__load_kernel_sym(struct dso *self, struct map *map,
1787 symbol_filter_t filter)
1790 const char *kallsyms_filename = NULL;
1791 char *kallsyms_allocated_filename = NULL;
1793 * Step 1: if the user specified a vmlinux filename, use it and only
1794 * it, reporting errors to the user if it cannot be used.
1796 * For instance, try to analyse an ARM perf.data file _without_ a
1797 * build-id, or if the user specifies the wrong path to the right
1798 * vmlinux file, obviously we can't fallback to another vmlinux (a
1799 * x86_86 one, on the machine where analysis is being performed, say),
1800 * or worse, /proc/kallsyms.
1802 * If the specified file _has_ a build-id and there is a build-id
1803 * section in the perf.data file, we will still do the expected
1804 * validation in dso__load_vmlinux and will bail out if they don't
1807 if (symbol_conf.vmlinux_name != NULL) {
1808 err = dso__load_vmlinux(self, map,
1809 symbol_conf.vmlinux_name, filter);
1811 dso__set_long_name(self,
1812 strdup(symbol_conf.vmlinux_name));
1818 if (vmlinux_path != NULL) {
1819 err = dso__load_vmlinux_path(self, map, filter);
1825 * Say the kernel DSO was created when processing the build-id header table,
1826 * we have a build-id, so check if it is the same as the running kernel,
1827 * using it if it is.
1829 if (self->has_build_id) {
1830 u8 kallsyms_build_id[BUILD_ID_SIZE];
1831 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
1833 if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id,
1834 sizeof(kallsyms_build_id)) == 0) {
1835 if (dso__build_id_equal(self, kallsyms_build_id)) {
1836 kallsyms_filename = "/proc/kallsyms";
1841 * Now look if we have it on the build-id cache in
1842 * $HOME/.debug/[kernel.kallsyms].
1844 build_id__sprintf(self->build_id, sizeof(self->build_id),
1847 if (asprintf(&kallsyms_allocated_filename,
1848 "%s/.debug/[kernel.kallsyms]/%s",
1849 getenv("HOME"), sbuild_id) == -1) {
1850 pr_err("Not enough memory for kallsyms file lookup\n");
1854 kallsyms_filename = kallsyms_allocated_filename;
1856 if (access(kallsyms_filename, F_OK)) {
1857 pr_err("No kallsyms or vmlinux with build-id %s "
1858 "was found\n", sbuild_id);
1859 free(kallsyms_allocated_filename);
1864 * Last resort, if we don't have a build-id and couldn't find
1865 * any vmlinux file, try the running kernel kallsyms table.
1867 kallsyms_filename = "/proc/kallsyms";
1871 err = dso__load_kallsyms(self, kallsyms_filename, map, filter);
1873 pr_debug("Using %s for symbols\n", kallsyms_filename);
1874 free(kallsyms_allocated_filename);
1878 if (kallsyms_filename != NULL)
1879 dso__set_long_name(self, strdup("[kernel.kallsyms]"));
1880 map__fixup_start(map);
1881 map__fixup_end(map);
1887 static int dso__load_guest_kernel_sym(struct dso *self, struct map *map,
1888 symbol_filter_t filter)
1891 const char *kallsyms_filename = NULL;
1892 struct machine *machine;
1893 char path[PATH_MAX];
1896 pr_debug("Guest kernel map hasn't the point to groups\n");
1899 machine = map->groups->machine;
1901 if (machine__is_default_guest(machine)) {
1903 * if the user specified a vmlinux filename, use it and only
1904 * it, reporting errors to the user if it cannot be used.
1905 * Or use file guest_kallsyms inputted by user on commandline
1907 if (symbol_conf.default_guest_vmlinux_name != NULL) {
1908 err = dso__load_vmlinux(self, map,
1909 symbol_conf.default_guest_vmlinux_name, filter);
1913 kallsyms_filename = symbol_conf.default_guest_kallsyms;
1914 if (!kallsyms_filename)
1917 sprintf(path, "%s/proc/kallsyms", machine->root_dir);
1918 kallsyms_filename = path;
1921 err = dso__load_kallsyms(self, kallsyms_filename, map, filter);
1923 pr_debug("Using %s for symbols\n", kallsyms_filename);
1927 if (kallsyms_filename != NULL) {
1928 machine__mmap_name(machine, path, sizeof(path));
1929 dso__set_long_name(self, strdup(path));
1931 map__fixup_start(map);
1932 map__fixup_end(map);
1938 static void dsos__add(struct list_head *head, struct dso *dso)
1940 list_add_tail(&dso->node, head);
1943 static struct dso *dsos__find(struct list_head *head, const char *name)
1947 list_for_each_entry(pos, head, node)
1948 if (strcmp(pos->long_name, name) == 0)
1953 struct dso *__dsos__findnew(struct list_head *head, const char *name)
1955 struct dso *dso = dsos__find(head, name);
1958 dso = dso__new(name);
1960 dsos__add(head, dso);
1961 dso__set_basename(dso);
1968 size_t __dsos__fprintf(struct list_head *head, FILE *fp)
1973 list_for_each_entry(pos, head, node) {
1975 for (i = 0; i < MAP__NR_TYPES; ++i)
1976 ret += dso__fprintf(pos, i, fp);
1982 size_t machines__fprintf_dsos(struct rb_root *self, FILE *fp)
1987 for (nd = rb_first(self); nd; nd = rb_next(nd)) {
1988 struct machine *pos = rb_entry(nd, struct machine, rb_node);
1989 ret += __dsos__fprintf(&pos->kernel_dsos, fp);
1990 ret += __dsos__fprintf(&pos->user_dsos, fp);
1996 static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp,
2002 list_for_each_entry(pos, head, node) {
2003 if (with_hits && !pos->hit)
2005 ret += dso__fprintf_buildid(pos, fp);
2006 ret += fprintf(fp, " %s\n", pos->long_name);
2011 size_t machine__fprintf_dsos_buildid(struct machine *self, FILE *fp, bool with_hits)
2013 return __dsos__fprintf_buildid(&self->kernel_dsos, fp, with_hits) +
2014 __dsos__fprintf_buildid(&self->user_dsos, fp, with_hits);
2017 size_t machines__fprintf_dsos_buildid(struct rb_root *self, FILE *fp, bool with_hits)
2022 for (nd = rb_first(self); nd; nd = rb_next(nd)) {
2023 struct machine *pos = rb_entry(nd, struct machine, rb_node);
2024 ret += machine__fprintf_dsos_buildid(pos, fp, with_hits);
2029 struct dso *dso__new_kernel(const char *name)
2031 struct dso *self = dso__new(name ?: "[kernel.kallsyms]");
2034 dso__set_short_name(self, "[kernel]");
2035 self->kernel = DSO_TYPE_KERNEL;
2041 static struct dso *dso__new_guest_kernel(struct machine *machine,
2045 struct dso *self = dso__new(name ?: machine__mmap_name(machine, bf, sizeof(bf)));
2048 dso__set_short_name(self, "[guest.kernel]");
2049 self->kernel = DSO_TYPE_GUEST_KERNEL;
2055 void dso__read_running_kernel_build_id(struct dso *self, struct machine *machine)
2057 char path[PATH_MAX];
2059 if (machine__is_default_guest(machine))
2061 sprintf(path, "%s/sys/kernel/notes", machine->root_dir);
2062 if (sysfs__read_build_id(path, self->build_id,
2063 sizeof(self->build_id)) == 0)
2064 self->has_build_id = true;
2067 static struct dso *machine__create_kernel(struct machine *self)
2069 const char *vmlinux_name = NULL;
2072 if (machine__is_host(self)) {
2073 vmlinux_name = symbol_conf.vmlinux_name;
2074 kernel = dso__new_kernel(vmlinux_name);
2076 if (machine__is_default_guest(self))
2077 vmlinux_name = symbol_conf.default_guest_vmlinux_name;
2078 kernel = dso__new_guest_kernel(self, vmlinux_name);
2081 if (kernel != NULL) {
2082 dso__read_running_kernel_build_id(kernel, self);
2083 dsos__add(&self->kernel_dsos, kernel);
2088 int __machine__create_kernel_maps(struct machine *self, struct dso *kernel)
2092 for (type = 0; type < MAP__NR_TYPES; ++type) {
2095 self->vmlinux_maps[type] = map__new2(0, kernel, type);
2096 if (self->vmlinux_maps[type] == NULL)
2099 self->vmlinux_maps[type]->map_ip =
2100 self->vmlinux_maps[type]->unmap_ip = identity__map_ip;
2102 kmap = map__kmap(self->vmlinux_maps[type]);
2103 kmap->kmaps = &self->kmaps;
2104 map_groups__insert(&self->kmaps, self->vmlinux_maps[type]);
2110 void machine__destroy_kernel_maps(struct machine *self)
2114 for (type = 0; type < MAP__NR_TYPES; ++type) {
2117 if (self->vmlinux_maps[type] == NULL)
2120 kmap = map__kmap(self->vmlinux_maps[type]);
2121 map_groups__remove(&self->kmaps, self->vmlinux_maps[type]);
2122 if (kmap->ref_reloc_sym) {
2124 * ref_reloc_sym is shared among all maps, so free just
2127 if (type == MAP__FUNCTION) {
2128 free((char *)kmap->ref_reloc_sym->name);
2129 kmap->ref_reloc_sym->name = NULL;
2130 free(kmap->ref_reloc_sym);
2132 kmap->ref_reloc_sym = NULL;
2135 map__delete(self->vmlinux_maps[type]);
2136 self->vmlinux_maps[type] = NULL;
2140 int machine__create_kernel_maps(struct machine *self)
2142 struct dso *kernel = machine__create_kernel(self);
2144 if (kernel == NULL ||
2145 __machine__create_kernel_maps(self, kernel) < 0)
2148 if (symbol_conf.use_modules && machine__create_modules(self) < 0)
2149 pr_debug("Problems creating module maps, continuing anyway...\n");
2151 * Now that we have all the maps created, just set the ->end of them:
2153 map_groups__fixup_end(&self->kmaps);
2157 static void vmlinux_path__exit(void)
2159 while (--vmlinux_path__nr_entries >= 0) {
2160 free(vmlinux_path[vmlinux_path__nr_entries]);
2161 vmlinux_path[vmlinux_path__nr_entries] = NULL;
2165 vmlinux_path = NULL;
2168 static int vmlinux_path__init(void)
2173 if (uname(&uts) < 0)
2176 vmlinux_path = malloc(sizeof(char *) * 5);
2177 if (vmlinux_path == NULL)
2180 vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux");
2181 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2183 ++vmlinux_path__nr_entries;
2184 vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux");
2185 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2187 ++vmlinux_path__nr_entries;
2188 snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", uts.release);
2189 vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
2190 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2192 ++vmlinux_path__nr_entries;
2193 snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", uts.release);
2194 vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
2195 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2197 ++vmlinux_path__nr_entries;
2198 snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux",
2200 vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
2201 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2203 ++vmlinux_path__nr_entries;
2208 vmlinux_path__exit();
2212 size_t machine__fprintf_vmlinux_path(struct machine *self, FILE *fp)
2216 struct dso *kdso = self->vmlinux_maps[MAP__FUNCTION]->dso;
2218 if (kdso->has_build_id) {
2219 char filename[PATH_MAX];
2220 if (dso__build_id_filename(kdso, filename, sizeof(filename)))
2221 printed += fprintf(fp, "[0] %s\n", filename);
2224 for (i = 0; i < vmlinux_path__nr_entries; ++i)
2225 printed += fprintf(fp, "[%d] %s\n",
2226 i + kdso->has_build_id, vmlinux_path[i]);
2231 static int setup_list(struct strlist **list, const char *list_str,
2232 const char *list_name)
2234 if (list_str == NULL)
2237 *list = strlist__new(true, list_str);
2239 pr_err("problems parsing %s list\n", list_name);
2245 int symbol__init(void)
2247 elf_version(EV_CURRENT);
2248 if (symbol_conf.sort_by_name)
2249 symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) -
2250 sizeof(struct symbol));
2252 if (symbol_conf.try_vmlinux_path && vmlinux_path__init() < 0)
2255 if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') {
2256 pr_err("'.' is the only non valid --field-separator argument\n");
2260 if (setup_list(&symbol_conf.dso_list,
2261 symbol_conf.dso_list_str, "dso") < 0)
2264 if (setup_list(&symbol_conf.comm_list,
2265 symbol_conf.comm_list_str, "comm") < 0)
2266 goto out_free_dso_list;
2268 if (setup_list(&symbol_conf.sym_list,
2269 symbol_conf.sym_list_str, "symbol") < 0)
2270 goto out_free_comm_list;
2275 strlist__delete(symbol_conf.dso_list);
2277 strlist__delete(symbol_conf.comm_list);
2281 void symbol__exit(void)
2283 strlist__delete(symbol_conf.sym_list);
2284 strlist__delete(symbol_conf.dso_list);
2285 strlist__delete(symbol_conf.comm_list);
2286 vmlinux_path__exit();
2287 symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL;
2290 int machines__create_kernel_maps(struct rb_root *self, pid_t pid)
2292 struct machine *machine = machines__findnew(self, pid);
2294 if (machine == NULL)
2297 return machine__create_kernel_maps(machine);
2300 static int hex(char ch)
2302 if ((ch >= '0') && (ch <= '9'))
2304 if ((ch >= 'a') && (ch <= 'f'))
2305 return ch - 'a' + 10;
2306 if ((ch >= 'A') && (ch <= 'F'))
2307 return ch - 'A' + 10;
2312 * While we find nice hex chars, build a long_val.
2313 * Return number of chars processed.
2315 int hex2u64(const char *ptr, u64 *long_val)
2317 const char *p = ptr;
2321 const int hex_val = hex(*p);
2326 *long_val = (*long_val << 4) | hex_val;
2333 char *strxfrchar(char *s, char from, char to)
2337 while ((p = strchr(p, from)) != NULL)
2343 int machines__create_guest_kernel_maps(struct rb_root *self)
2346 struct dirent **namelist = NULL;
2348 char path[PATH_MAX];
2351 if (symbol_conf.default_guest_vmlinux_name ||
2352 symbol_conf.default_guest_modules ||
2353 symbol_conf.default_guest_kallsyms) {
2354 machines__create_kernel_maps(self, DEFAULT_GUEST_KERNEL_ID);
2357 if (symbol_conf.guestmount) {
2358 items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL);
2361 for (i = 0; i < items; i++) {
2362 if (!isdigit(namelist[i]->d_name[0])) {
2363 /* Filter out . and .. */
2366 pid = atoi(namelist[i]->d_name);
2367 sprintf(path, "%s/%s/proc/kallsyms",
2368 symbol_conf.guestmount,
2369 namelist[i]->d_name);
2370 ret = access(path, R_OK);
2372 pr_debug("Can't access file %s\n", path);
2375 machines__create_kernel_maps(self, pid);
2384 void machines__destroy_guest_kernel_maps(struct rb_root *self)
2386 struct rb_node *next = rb_first(self);
2389 struct machine *pos = rb_entry(next, struct machine, rb_node);
2391 next = rb_next(&pos->rb_node);
2392 rb_erase(&pos->rb_node, self);
2393 machine__delete(pos);
2397 int machine__load_kallsyms(struct machine *self, const char *filename,
2398 enum map_type type, symbol_filter_t filter)
2400 struct map *map = self->vmlinux_maps[type];
2401 int ret = dso__load_kallsyms(map->dso, filename, map, filter);
2404 dso__set_loaded(map->dso, type);
2406 * Since /proc/kallsyms will have multiple sessions for the
2407 * kernel, with modules between them, fixup the end of all
2410 __map_groups__fixup_end(&self->kmaps, type);
2416 int machine__load_vmlinux_path(struct machine *self, enum map_type type,
2417 symbol_filter_t filter)
2419 struct map *map = self->vmlinux_maps[type];
2420 int ret = dso__load_vmlinux_path(map->dso, map, filter);
2423 dso__set_loaded(map->dso, type);
2424 map__reloc_vmlinux(map);