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 = ((void *)sym) - sizeof(*parent), *s;
302 s = rb_entry(parent, struct symbol_name_rb_node, rb_node);
303 if (strcmp(sym->name, s->sym.name) < 0)
308 rb_link_node(&symn->rb_node, parent, p);
309 rb_insert_color(&symn->rb_node, self);
312 static void symbols__sort_by_name(struct rb_root *self, struct rb_root *source)
316 for (nd = rb_first(source); nd; nd = rb_next(nd)) {
317 struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
318 symbols__insert_by_name(self, pos);
322 static struct symbol *symbols__find_by_name(struct rb_root *self, const char *name)
332 struct symbol_name_rb_node *s;
335 s = rb_entry(n, struct symbol_name_rb_node, rb_node);
336 cmp = strcmp(name, s->sym.name);
349 struct symbol *dso__find_symbol(struct dso *self,
350 enum map_type type, u64 addr)
352 return symbols__find(&self->symbols[type], addr);
355 struct symbol *dso__find_symbol_by_name(struct dso *self, enum map_type type,
358 return symbols__find_by_name(&self->symbol_names[type], name);
361 void dso__sort_by_name(struct dso *self, enum map_type type)
363 dso__set_sorted_by_name(self, type);
364 return symbols__sort_by_name(&self->symbol_names[type],
365 &self->symbols[type]);
368 int build_id__sprintf(const u8 *self, int len, char *bf)
371 const u8 *raw = self;
374 for (i = 0; i < len; ++i) {
375 sprintf(bid, "%02x", *raw);
383 size_t dso__fprintf_buildid(struct dso *self, FILE *fp)
385 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
387 build_id__sprintf(self->build_id, sizeof(self->build_id), sbuild_id);
388 return fprintf(fp, "%s", sbuild_id);
391 size_t dso__fprintf(struct dso *self, enum map_type type, FILE *fp)
394 size_t ret = fprintf(fp, "dso: %s (", self->short_name);
396 if (self->short_name != self->long_name)
397 ret += fprintf(fp, "%s, ", self->long_name);
398 ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type],
399 self->loaded ? "" : "NOT ");
400 ret += dso__fprintf_buildid(self, fp);
401 ret += fprintf(fp, ")\n");
402 for (nd = rb_first(&self->symbols[type]); nd; nd = rb_next(nd)) {
403 struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
404 ret += symbol__fprintf(pos, fp);
410 int kallsyms__parse(const char *filename, void *arg,
411 int (*process_symbol)(void *arg, const char *name,
412 char type, u64 start))
417 FILE *file = fopen(filename, "r");
422 while (!feof(file)) {
428 line_len = getline(&line, &n, file);
429 if (line_len < 0 || !line)
432 line[--line_len] = '\0'; /* \n */
434 len = hex2u64(line, &start);
437 if (len + 2 >= line_len)
440 symbol_type = toupper(line[len]);
441 symbol_name = line + len + 2;
443 err = process_symbol(arg, symbol_name, symbol_type, start);
456 struct process_kallsyms_args {
461 static u8 kallsyms2elf_type(char type)
466 return isupper(type) ? STB_GLOBAL : STB_LOCAL;
469 static int map__process_kallsym_symbol(void *arg, const char *name,
470 char type, u64 start)
473 struct process_kallsyms_args *a = arg;
474 struct rb_root *root = &a->dso->symbols[a->map->type];
476 if (!symbol_type__is_a(type, a->map->type))
480 * Will fix up the end later, when we have all symbols sorted.
482 sym = symbol__new(start, 0, kallsyms2elf_type(type), name);
487 * We will pass the symbols to the filter later, in
488 * map__split_kallsyms, when we have split the maps per module
490 symbols__insert(root, sym);
496 * Loads the function entries in /proc/kallsyms into kernel_map->dso,
497 * so that we can in the next step set the symbol ->end address and then
498 * call kernel_maps__split_kallsyms.
500 static int dso__load_all_kallsyms(struct dso *self, const char *filename,
503 struct process_kallsyms_args args = { .map = map, .dso = self, };
504 return kallsyms__parse(filename, &args, map__process_kallsym_symbol);
508 * Split the symbols into maps, making sure there are no overlaps, i.e. the
509 * kernel range is broken in several maps, named [kernel].N, as we don't have
510 * the original ELF section names vmlinux have.
512 static int dso__split_kallsyms(struct dso *self, struct map *map,
513 symbol_filter_t filter)
515 struct map_groups *kmaps = map__kmap(map)->kmaps;
516 struct machine *machine = kmaps->machine;
517 struct map *curr_map = map;
520 struct rb_root *root = &self->symbols[map->type];
521 struct rb_node *next = rb_first(root);
522 int kernel_range = 0;
527 pos = rb_entry(next, struct symbol, rb_node);
528 next = rb_next(&pos->rb_node);
530 module = strchr(pos->name, '\t');
532 if (!symbol_conf.use_modules)
537 if (strcmp(curr_map->dso->short_name, module)) {
538 if (curr_map != map &&
539 self->kernel == DSO_TYPE_GUEST_KERNEL &&
540 machine__is_default_guest(machine)) {
542 * We assume all symbols of a module are
543 * continuous in * kallsyms, so curr_map
544 * points to a module and all its
545 * symbols are in its kmap. Mark it as
548 dso__set_loaded(curr_map->dso,
552 curr_map = map_groups__find_by_name(kmaps,
554 if (curr_map == NULL) {
555 pr_debug("%s/proc/{kallsyms,modules} "
556 "inconsistency while looking "
557 "for \"%s\" module!\n",
558 machine->root_dir, module);
563 if (curr_map->dso->loaded &&
564 !machine__is_default_guest(machine))
568 * So that we look just like we get from .ko files,
569 * i.e. not prelinked, relative to map->start.
571 pos->start = curr_map->map_ip(curr_map, pos->start);
572 pos->end = curr_map->map_ip(curr_map, pos->end);
573 } else if (curr_map != map) {
574 char dso_name[PATH_MAX];
577 if (self->kernel == DSO_TYPE_GUEST_KERNEL)
578 snprintf(dso_name, sizeof(dso_name),
582 snprintf(dso_name, sizeof(dso_name),
586 dso = dso__new(dso_name);
590 dso->kernel = self->kernel;
592 curr_map = map__new2(pos->start, dso, map->type);
593 if (curr_map == NULL) {
598 curr_map->map_ip = curr_map->unmap_ip = identity__map_ip;
599 map_groups__insert(kmaps, curr_map);
603 if (filter && filter(curr_map, pos)) {
604 discard_symbol: rb_erase(&pos->rb_node, root);
607 if (curr_map != map) {
608 rb_erase(&pos->rb_node, root);
609 symbols__insert(&curr_map->dso->symbols[curr_map->type], pos);
615 if (curr_map != map &&
616 self->kernel == DSO_TYPE_GUEST_KERNEL &&
617 machine__is_default_guest(kmaps->machine)) {
618 dso__set_loaded(curr_map->dso, curr_map->type);
624 int dso__load_kallsyms(struct dso *self, const char *filename,
625 struct map *map, symbol_filter_t filter)
627 if (dso__load_all_kallsyms(self, filename, map) < 0)
630 symbols__fixup_end(&self->symbols[map->type]);
631 if (self->kernel == DSO_TYPE_GUEST_KERNEL)
632 self->origin = DSO__ORIG_GUEST_KERNEL;
634 self->origin = DSO__ORIG_KERNEL;
636 return dso__split_kallsyms(self, map, filter);
639 static int dso__load_perf_map(struct dso *self, struct map *map,
640 symbol_filter_t filter)
647 file = fopen(self->long_name, "r");
651 while (!feof(file)) {
656 line_len = getline(&line, &n, file);
663 line[--line_len] = '\0'; /* \n */
665 len = hex2u64(line, &start);
668 if (len + 2 >= line_len)
671 len += hex2u64(line + len, &size);
674 if (len + 2 >= line_len)
677 sym = symbol__new(start, size, STB_GLOBAL, line + len);
680 goto out_delete_line;
682 if (filter && filter(map, sym))
685 symbols__insert(&self->symbols[map->type], sym);
702 * elf_symtab__for_each_symbol - iterate thru all the symbols
704 * @self: struct elf_symtab instance to iterate
706 * @sym: GElf_Sym iterator
708 #define elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) \
709 for (idx = 0, gelf_getsym(syms, idx, &sym);\
711 idx++, gelf_getsym(syms, idx, &sym))
713 static inline uint8_t elf_sym__type(const GElf_Sym *sym)
715 return GELF_ST_TYPE(sym->st_info);
718 static inline int elf_sym__is_function(const GElf_Sym *sym)
720 return elf_sym__type(sym) == STT_FUNC &&
722 sym->st_shndx != SHN_UNDEF;
725 static inline bool elf_sym__is_object(const GElf_Sym *sym)
727 return elf_sym__type(sym) == STT_OBJECT &&
729 sym->st_shndx != SHN_UNDEF;
732 static inline int elf_sym__is_label(const GElf_Sym *sym)
734 return elf_sym__type(sym) == STT_NOTYPE &&
736 sym->st_shndx != SHN_UNDEF &&
737 sym->st_shndx != SHN_ABS;
740 static inline const char *elf_sec__name(const GElf_Shdr *shdr,
741 const Elf_Data *secstrs)
743 return secstrs->d_buf + shdr->sh_name;
746 static inline int elf_sec__is_text(const GElf_Shdr *shdr,
747 const Elf_Data *secstrs)
749 return strstr(elf_sec__name(shdr, secstrs), "text") != NULL;
752 static inline bool elf_sec__is_data(const GElf_Shdr *shdr,
753 const Elf_Data *secstrs)
755 return strstr(elf_sec__name(shdr, secstrs), "data") != NULL;
758 static inline const char *elf_sym__name(const GElf_Sym *sym,
759 const Elf_Data *symstrs)
761 return symstrs->d_buf + sym->st_name;
764 static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
765 GElf_Shdr *shp, const char *name,
771 while ((sec = elf_nextscn(elf, sec)) != NULL) {
774 gelf_getshdr(sec, shp);
775 str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name);
776 if (!strcmp(name, str)) {
787 #define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \
788 for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \
790 ++idx, pos = gelf_getrel(reldata, idx, &pos_mem))
792 #define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \
793 for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \
795 ++idx, pos = gelf_getrela(reldata, idx, &pos_mem))
798 * We need to check if we have a .dynsym, so that we can handle the
799 * .plt, synthesizing its symbols, that aren't on the symtabs (be it
800 * .dynsym or .symtab).
801 * And always look at the original dso, not at debuginfo packages, that
802 * have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS).
804 static int dso__synthesize_plt_symbols(struct dso *self, struct map *map,
805 symbol_filter_t filter)
807 uint32_t nr_rel_entries, idx;
812 GElf_Shdr shdr_rel_plt, shdr_dynsym;
813 Elf_Data *reldata, *syms, *symstrs;
814 Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym;
817 char sympltname[1024];
819 int nr = 0, symidx, fd, err = 0;
821 fd = open(self->long_name, O_RDONLY);
825 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
829 if (gelf_getehdr(elf, &ehdr) == NULL)
832 scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym,
833 ".dynsym", &dynsym_idx);
834 if (scn_dynsym == NULL)
837 scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,
839 if (scn_plt_rel == NULL) {
840 scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,
842 if (scn_plt_rel == NULL)
848 if (shdr_rel_plt.sh_link != dynsym_idx)
851 if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL)
855 * Fetch the relocation section to find the idxes to the GOT
856 * and the symbols in the .dynsym they refer to.
858 reldata = elf_getdata(scn_plt_rel, NULL);
862 syms = elf_getdata(scn_dynsym, NULL);
866 scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link);
867 if (scn_symstrs == NULL)
870 symstrs = elf_getdata(scn_symstrs, NULL);
874 nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize;
875 plt_offset = shdr_plt.sh_offset;
877 if (shdr_rel_plt.sh_type == SHT_RELA) {
878 GElf_Rela pos_mem, *pos;
880 elf_section__for_each_rela(reldata, pos, pos_mem, idx,
882 symidx = GELF_R_SYM(pos->r_info);
883 plt_offset += shdr_plt.sh_entsize;
884 gelf_getsym(syms, symidx, &sym);
885 snprintf(sympltname, sizeof(sympltname),
886 "%s@plt", elf_sym__name(&sym, symstrs));
888 f = symbol__new(plt_offset, shdr_plt.sh_entsize,
889 STB_GLOBAL, sympltname);
893 if (filter && filter(map, f))
896 symbols__insert(&self->symbols[map->type], f);
900 } else if (shdr_rel_plt.sh_type == SHT_REL) {
901 GElf_Rel pos_mem, *pos;
902 elf_section__for_each_rel(reldata, pos, pos_mem, idx,
904 symidx = GELF_R_SYM(pos->r_info);
905 plt_offset += shdr_plt.sh_entsize;
906 gelf_getsym(syms, symidx, &sym);
907 snprintf(sympltname, sizeof(sympltname),
908 "%s@plt", elf_sym__name(&sym, symstrs));
910 f = symbol__new(plt_offset, shdr_plt.sh_entsize,
911 STB_GLOBAL, sympltname);
915 if (filter && filter(map, f))
918 symbols__insert(&self->symbols[map->type], f);
933 pr_debug("%s: problems reading %s PLT info.\n",
934 __func__, self->long_name);
938 static bool elf_sym__is_a(GElf_Sym *self, enum map_type type)
942 return elf_sym__is_function(self);
944 return elf_sym__is_object(self);
950 static bool elf_sec__is_a(GElf_Shdr *self, Elf_Data *secstrs, enum map_type type)
954 return elf_sec__is_text(self, secstrs);
956 return elf_sec__is_data(self, secstrs);
962 static size_t elf_addr_to_index(Elf *elf, GElf_Addr addr)
968 while ((sec = elf_nextscn(elf, sec)) != NULL) {
969 gelf_getshdr(sec, &shdr);
971 if ((addr >= shdr.sh_addr) &&
972 (addr < (shdr.sh_addr + shdr.sh_size)))
981 static int dso__load_sym(struct dso *self, struct map *map, const char *name,
982 int fd, symbol_filter_t filter, int kmodule,
985 struct kmap *kmap = self->kernel ? map__kmap(map) : NULL;
986 struct map *curr_map = map;
987 struct dso *curr_dso = self;
988 Elf_Data *symstrs, *secstrs;
993 GElf_Shdr shdr, opdshdr;
994 Elf_Data *syms, *opddata = NULL;
996 Elf_Scn *sec, *sec_strndx, *opdsec;
1001 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
1003 pr_debug("%s: cannot read %s ELF file.\n", __func__, name);
1007 if (gelf_getehdr(elf, &ehdr) == NULL) {
1008 pr_debug("%s: cannot get elf header.\n", __func__);
1012 /* Always reject images with a mismatched build-id: */
1013 if (self->has_build_id) {
1014 u8 build_id[BUILD_ID_SIZE];
1016 if (elf_read_build_id(elf, build_id,
1017 BUILD_ID_SIZE) != BUILD_ID_SIZE)
1020 if (!dso__build_id_equal(self, build_id))
1024 sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL);
1029 sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL);
1034 opdsec = elf_section_by_name(elf, &ehdr, &opdshdr, ".opd", &opdidx);
1036 opddata = elf_rawdata(opdsec, NULL);
1038 syms = elf_getdata(sec, NULL);
1042 sec = elf_getscn(elf, shdr.sh_link);
1046 symstrs = elf_getdata(sec, NULL);
1047 if (symstrs == NULL)
1050 sec_strndx = elf_getscn(elf, ehdr.e_shstrndx);
1051 if (sec_strndx == NULL)
1054 secstrs = elf_getdata(sec_strndx, NULL);
1055 if (secstrs == NULL)
1058 nr_syms = shdr.sh_size / shdr.sh_entsize;
1060 memset(&sym, 0, sizeof(sym));
1061 if (self->kernel == DSO_TYPE_USER) {
1062 self->adjust_symbols = (ehdr.e_type == ET_EXEC ||
1063 elf_section_by_name(elf, &ehdr, &shdr,
1064 ".gnu.prelink_undo",
1066 } else self->adjust_symbols = 0;
1068 elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) {
1070 const char *elf_name = elf_sym__name(&sym, symstrs);
1071 char *demangled = NULL;
1072 int is_label = elf_sym__is_label(&sym);
1073 const char *section_name;
1075 if (kmap && kmap->ref_reloc_sym && kmap->ref_reloc_sym->name &&
1076 strcmp(elf_name, kmap->ref_reloc_sym->name) == 0)
1077 kmap->ref_reloc_sym->unrelocated_addr = sym.st_value;
1079 if (!is_label && !elf_sym__is_a(&sym, map->type))
1082 /* Reject ARM ELF "mapping symbols": these aren't unique and
1083 * don't identify functions, so will confuse the profile
1085 if (ehdr.e_machine == EM_ARM) {
1086 if (!strcmp(elf_name, "$a") ||
1087 !strcmp(elf_name, "$d") ||
1088 !strcmp(elf_name, "$t"))
1092 if (opdsec && sym.st_shndx == opdidx) {
1093 u32 offset = sym.st_value - opdshdr.sh_addr;
1094 u64 *opd = opddata->d_buf + offset;
1095 sym.st_value = *opd;
1096 sym.st_shndx = elf_addr_to_index(elf, sym.st_value);
1099 sec = elf_getscn(elf, sym.st_shndx);
1103 gelf_getshdr(sec, &shdr);
1105 if (is_label && !elf_sec__is_a(&shdr, secstrs, map->type))
1108 section_name = elf_sec__name(&shdr, secstrs);
1110 if (self->kernel != DSO_TYPE_USER || kmodule) {
1111 char dso_name[PATH_MAX];
1113 if (strcmp(section_name,
1114 (curr_dso->short_name +
1115 self->short_name_len)) == 0)
1118 if (strcmp(section_name, ".text") == 0) {
1124 snprintf(dso_name, sizeof(dso_name),
1125 "%s%s", self->short_name, section_name);
1127 curr_map = map_groups__find_by_name(kmap->kmaps, map->type, dso_name);
1128 if (curr_map == NULL) {
1129 u64 start = sym.st_value;
1132 start += map->start + shdr.sh_offset;
1134 curr_dso = dso__new(dso_name);
1135 if (curr_dso == NULL)
1137 curr_dso->kernel = self->kernel;
1138 curr_map = map__new2(start, curr_dso,
1140 if (curr_map == NULL) {
1141 dso__delete(curr_dso);
1144 curr_map->map_ip = identity__map_ip;
1145 curr_map->unmap_ip = identity__map_ip;
1146 curr_dso->origin = self->origin;
1147 map_groups__insert(kmap->kmaps, curr_map);
1148 dsos__add(&self->node, curr_dso);
1149 dso__set_loaded(curr_dso, map->type);
1151 curr_dso = curr_map->dso;
1156 if (curr_dso->adjust_symbols) {
1157 pr_debug4("%s: adjusting symbol: st_value: %#Lx "
1158 "sh_addr: %#Lx sh_offset: %#Lx\n", __func__,
1159 (u64)sym.st_value, (u64)shdr.sh_addr,
1160 (u64)shdr.sh_offset);
1161 sym.st_value -= shdr.sh_addr - shdr.sh_offset;
1164 * We need to figure out if the object was created from C++ sources
1165 * DWARF DW_compile_unit has this, but we don't always have access
1168 demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI);
1169 if (demangled != NULL)
1170 elf_name = demangled;
1172 f = symbol__new(sym.st_value, sym.st_size,
1173 GELF_ST_BIND(sym.st_info), elf_name);
1178 if (filter && filter(curr_map, f))
1181 symbols__insert(&curr_dso->symbols[curr_map->type], f);
1187 * For misannotated, zeroed, ASM function sizes.
1190 symbols__fixup_end(&self->symbols[map->type]);
1193 * We need to fixup this here too because we create new
1194 * maps here, for things like vsyscall sections.
1196 __map_groups__fixup_end(kmap->kmaps, map->type);
1206 static bool dso__build_id_equal(const struct dso *self, u8 *build_id)
1208 return memcmp(self->build_id, build_id, sizeof(self->build_id)) == 0;
1211 bool __dsos__read_build_ids(struct list_head *head, bool with_hits)
1213 bool have_build_id = false;
1216 list_for_each_entry(pos, head, node) {
1217 if (with_hits && !pos->hit)
1219 if (pos->has_build_id) {
1220 have_build_id = true;
1223 if (filename__read_build_id(pos->long_name, pos->build_id,
1224 sizeof(pos->build_id)) > 0) {
1225 have_build_id = true;
1226 pos->has_build_id = true;
1230 return have_build_id;
1234 * Align offset to 4 bytes as needed for note name and descriptor data.
1236 #define NOTE_ALIGN(n) (((n) + 3) & -4U)
1238 static int elf_read_build_id(Elf *elf, void *bf, size_t size)
1248 if (size < BUILD_ID_SIZE)
1252 if (ek != ELF_K_ELF)
1255 if (gelf_getehdr(elf, &ehdr) == NULL) {
1256 pr_err("%s: cannot get elf header.\n", __func__);
1260 sec = elf_section_by_name(elf, &ehdr, &shdr,
1261 ".note.gnu.build-id", NULL);
1263 sec = elf_section_by_name(elf, &ehdr, &shdr,
1269 data = elf_getdata(sec, NULL);
1274 while (ptr < (data->d_buf + data->d_size)) {
1275 GElf_Nhdr *nhdr = ptr;
1276 int namesz = NOTE_ALIGN(nhdr->n_namesz),
1277 descsz = NOTE_ALIGN(nhdr->n_descsz);
1280 ptr += sizeof(*nhdr);
1283 if (nhdr->n_type == NT_GNU_BUILD_ID &&
1284 nhdr->n_namesz == sizeof("GNU")) {
1285 if (memcmp(name, "GNU", sizeof("GNU")) == 0) {
1286 memcpy(bf, ptr, BUILD_ID_SIZE);
1287 err = BUILD_ID_SIZE;
1298 int filename__read_build_id(const char *filename, void *bf, size_t size)
1303 if (size < BUILD_ID_SIZE)
1306 fd = open(filename, O_RDONLY);
1310 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
1312 pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename);
1316 err = elf_read_build_id(elf, bf, size);
1325 int sysfs__read_build_id(const char *filename, void *build_id, size_t size)
1329 if (size < BUILD_ID_SIZE)
1332 fd = open(filename, O_RDONLY);
1341 if (read(fd, &nhdr, sizeof(nhdr)) != sizeof(nhdr))
1344 namesz = NOTE_ALIGN(nhdr.n_namesz);
1345 descsz = NOTE_ALIGN(nhdr.n_descsz);
1346 if (nhdr.n_type == NT_GNU_BUILD_ID &&
1347 nhdr.n_namesz == sizeof("GNU")) {
1348 if (read(fd, bf, namesz) != namesz)
1350 if (memcmp(bf, "GNU", sizeof("GNU")) == 0) {
1351 if (read(fd, build_id,
1352 BUILD_ID_SIZE) == BUILD_ID_SIZE) {
1356 } else if (read(fd, bf, descsz) != descsz)
1359 int n = namesz + descsz;
1360 if (read(fd, bf, n) != n)
1369 char dso__symtab_origin(const struct dso *self)
1371 static const char origin[] = {
1372 [DSO__ORIG_KERNEL] = 'k',
1373 [DSO__ORIG_JAVA_JIT] = 'j',
1374 [DSO__ORIG_BUILD_ID_CACHE] = 'B',
1375 [DSO__ORIG_FEDORA] = 'f',
1376 [DSO__ORIG_UBUNTU] = 'u',
1377 [DSO__ORIG_BUILDID] = 'b',
1378 [DSO__ORIG_DSO] = 'd',
1379 [DSO__ORIG_KMODULE] = 'K',
1380 [DSO__ORIG_GUEST_KERNEL] = 'g',
1381 [DSO__ORIG_GUEST_KMODULE] = 'G',
1384 if (self == NULL || self->origin == DSO__ORIG_NOT_FOUND)
1386 return origin[self->origin];
1389 int dso__load(struct dso *self, struct map *map, symbol_filter_t filter)
1391 int size = PATH_MAX;
1395 struct machine *machine;
1396 const char *root_dir;
1399 dso__set_loaded(self, map->type);
1401 if (self->kernel == DSO_TYPE_KERNEL)
1402 return dso__load_kernel_sym(self, map, filter);
1403 else if (self->kernel == DSO_TYPE_GUEST_KERNEL)
1404 return dso__load_guest_kernel_sym(self, map, filter);
1406 if (map->groups && map->groups->machine)
1407 machine = map->groups->machine;
1411 name = malloc(size);
1415 self->adjust_symbols = 0;
1417 if (strncmp(self->name, "/tmp/perf-", 10) == 0) {
1418 ret = dso__load_perf_map(self, map, filter);
1419 self->origin = ret > 0 ? DSO__ORIG_JAVA_JIT :
1420 DSO__ORIG_NOT_FOUND;
1424 /* Iterate over candidate debug images.
1425 * On the first pass, only load images if they have a full symtab.
1426 * Failing that, do a second pass where we accept .dynsym also
1428 for (self->origin = DSO__ORIG_BUILD_ID_CACHE, want_symtab = 1;
1429 self->origin != DSO__ORIG_NOT_FOUND;
1431 switch (self->origin) {
1432 case DSO__ORIG_BUILD_ID_CACHE:
1433 if (dso__build_id_filename(self, name, size) == NULL)
1436 case DSO__ORIG_FEDORA:
1437 snprintf(name, size, "/usr/lib/debug%s.debug",
1440 case DSO__ORIG_UBUNTU:
1441 snprintf(name, size, "/usr/lib/debug%s",
1444 case DSO__ORIG_BUILDID: {
1445 char build_id_hex[BUILD_ID_SIZE * 2 + 1];
1447 if (!self->has_build_id)
1450 build_id__sprintf(self->build_id,
1451 sizeof(self->build_id),
1453 snprintf(name, size,
1454 "/usr/lib/debug/.build-id/%.2s/%s.debug",
1455 build_id_hex, build_id_hex + 2);
1459 snprintf(name, size, "%s", self->long_name);
1461 case DSO__ORIG_GUEST_KMODULE:
1462 if (map->groups && map->groups->machine)
1463 root_dir = map->groups->machine->root_dir;
1466 snprintf(name, size, "%s%s", root_dir, self->long_name);
1471 * If we wanted a full symtab but no image had one,
1472 * relax our requirements and repeat the search.
1476 self->origin = DSO__ORIG_BUILD_ID_CACHE;
1481 /* Name is now the name of the next image to try */
1482 fd = open(name, O_RDONLY);
1486 ret = dso__load_sym(self, map, name, fd, filter, 0,
1491 * Some people seem to have debuginfo files _WITHOUT_ debug
1498 int nr_plt = dso__synthesize_plt_symbols(self, map, filter);
1506 if (ret < 0 && strstr(self->name, " (deleted)") != NULL)
1511 struct map *map_groups__find_by_name(struct map_groups *self,
1512 enum map_type type, const char *name)
1516 for (nd = rb_first(&self->maps[type]); nd; nd = rb_next(nd)) {
1517 struct map *map = rb_entry(nd, struct map, rb_node);
1519 if (map->dso && strcmp(map->dso->short_name, name) == 0)
1526 static int dso__kernel_module_get_build_id(struct dso *self,
1527 const char *root_dir)
1529 char filename[PATH_MAX];
1531 * kernel module short names are of the form "[module]" and
1532 * we need just "module" here.
1534 const char *name = self->short_name + 1;
1536 snprintf(filename, sizeof(filename),
1537 "%s/sys/module/%.*s/notes/.note.gnu.build-id",
1538 root_dir, (int)strlen(name) - 1, name);
1540 if (sysfs__read_build_id(filename, self->build_id,
1541 sizeof(self->build_id)) == 0)
1542 self->has_build_id = true;
1547 static int map_groups__set_modules_path_dir(struct map_groups *self,
1548 const char *dir_name)
1550 struct dirent *dent;
1551 DIR *dir = opendir(dir_name);
1555 pr_debug("%s: cannot open %s dir\n", __func__, dir_name);
1559 while ((dent = readdir(dir)) != NULL) {
1560 char path[PATH_MAX];
1563 /*sshfs might return bad dent->d_type, so we have to stat*/
1564 sprintf(path, "%s/%s", dir_name, dent->d_name);
1565 if (stat(path, &st))
1568 if (S_ISDIR(st.st_mode)) {
1569 if (!strcmp(dent->d_name, ".") ||
1570 !strcmp(dent->d_name, ".."))
1573 snprintf(path, sizeof(path), "%s/%s",
1574 dir_name, dent->d_name);
1575 ret = map_groups__set_modules_path_dir(self, path);
1579 char *dot = strrchr(dent->d_name, '.'),
1584 if (dot == NULL || strcmp(dot, ".ko"))
1586 snprintf(dso_name, sizeof(dso_name), "[%.*s]",
1587 (int)(dot - dent->d_name), dent->d_name);
1589 strxfrchar(dso_name, '-', '_');
1590 map = map_groups__find_by_name(self, MAP__FUNCTION, dso_name);
1594 snprintf(path, sizeof(path), "%s/%s",
1595 dir_name, dent->d_name);
1597 long_name = strdup(path);
1598 if (long_name == NULL) {
1602 dso__set_long_name(map->dso, long_name);
1603 map->dso->lname_alloc = 1;
1604 dso__kernel_module_get_build_id(map->dso, "");
1613 static char *get_kernel_version(const char *root_dir)
1615 char version[PATH_MAX];
1618 const char *prefix = "Linux version ";
1620 sprintf(version, "%s/proc/version", root_dir);
1621 file = fopen(version, "r");
1626 tmp = fgets(version, sizeof(version), file);
1629 name = strstr(version, prefix);
1632 name += strlen(prefix);
1633 tmp = strchr(name, ' ');
1637 return strdup(name);
1640 static int machine__set_modules_path(struct machine *self)
1643 char modules_path[PATH_MAX];
1645 version = get_kernel_version(self->root_dir);
1649 snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s/kernel",
1650 self->root_dir, version);
1653 return map_groups__set_modules_path_dir(&self->kmaps, modules_path);
1657 * Constructor variant for modules (where we know from /proc/modules where
1658 * they are loaded) and for vmlinux, where only after we load all the
1659 * symbols we'll know where it starts and ends.
1661 static struct map *map__new2(u64 start, struct dso *dso, enum map_type type)
1663 struct map *self = calloc(1, (sizeof(*self) +
1664 (dso->kernel ? sizeof(struct kmap) : 0)));
1667 * ->end will be filled after we load all the symbols
1669 map__init(self, type, start, 0, 0, dso);
1675 struct map *machine__new_module(struct machine *self, u64 start,
1676 const char *filename)
1679 struct dso *dso = __dsos__findnew(&self->kernel_dsos, filename);
1684 map = map__new2(start, dso, MAP__FUNCTION);
1688 if (machine__is_host(self))
1689 dso->origin = DSO__ORIG_KMODULE;
1691 dso->origin = DSO__ORIG_GUEST_KMODULE;
1692 map_groups__insert(&self->kmaps, map);
1696 static int machine__create_modules(struct machine *self)
1702 const char *modules;
1703 char path[PATH_MAX];
1705 if (machine__is_default_guest(self))
1706 modules = symbol_conf.default_guest_modules;
1708 sprintf(path, "%s/proc/modules", self->root_dir);
1712 file = fopen(modules, "r");
1716 while (!feof(file)) {
1717 char name[PATH_MAX];
1722 line_len = getline(&line, &n, file);
1729 line[--line_len] = '\0'; /* \n */
1731 sep = strrchr(line, 'x');
1735 hex2u64(sep + 1, &start);
1737 sep = strchr(line, ' ');
1743 snprintf(name, sizeof(name), "[%s]", line);
1744 map = machine__new_module(self, start, name);
1746 goto out_delete_line;
1747 dso__kernel_module_get_build_id(map->dso, self->root_dir);
1753 return machine__set_modules_path(self);
1761 static int dso__load_vmlinux(struct dso *self, struct map *map,
1762 const char *vmlinux, symbol_filter_t filter)
1766 fd = open(vmlinux, O_RDONLY);
1770 dso__set_loaded(self, map->type);
1771 err = dso__load_sym(self, map, vmlinux, fd, filter, 0, 0);
1775 pr_debug("Using %s for symbols\n", vmlinux);
1780 int dso__load_vmlinux_path(struct dso *self, struct map *map,
1781 symbol_filter_t filter)
1786 pr_debug("Looking at the vmlinux_path (%d entries long)\n",
1787 vmlinux_path__nr_entries + 1);
1789 filename = dso__build_id_filename(self, NULL, 0);
1790 if (filename != NULL) {
1791 err = dso__load_vmlinux(self, map, filename, filter);
1793 dso__set_long_name(self, filename);
1799 for (i = 0; i < vmlinux_path__nr_entries; ++i) {
1800 err = dso__load_vmlinux(self, map, vmlinux_path[i], filter);
1802 dso__set_long_name(self, strdup(vmlinux_path[i]));
1810 static int dso__load_kernel_sym(struct dso *self, struct map *map,
1811 symbol_filter_t filter)
1814 const char *kallsyms_filename = NULL;
1815 char *kallsyms_allocated_filename = NULL;
1817 * Step 1: if the user specified a vmlinux filename, use it and only
1818 * it, reporting errors to the user if it cannot be used.
1820 * For instance, try to analyse an ARM perf.data file _without_ a
1821 * build-id, or if the user specifies the wrong path to the right
1822 * vmlinux file, obviously we can't fallback to another vmlinux (a
1823 * x86_86 one, on the machine where analysis is being performed, say),
1824 * or worse, /proc/kallsyms.
1826 * If the specified file _has_ a build-id and there is a build-id
1827 * section in the perf.data file, we will still do the expected
1828 * validation in dso__load_vmlinux and will bail out if they don't
1831 if (symbol_conf.vmlinux_name != NULL) {
1832 err = dso__load_vmlinux(self, map,
1833 symbol_conf.vmlinux_name, filter);
1835 dso__set_long_name(self,
1836 strdup(symbol_conf.vmlinux_name));
1842 if (vmlinux_path != NULL) {
1843 err = dso__load_vmlinux_path(self, map, filter);
1849 * Say the kernel DSO was created when processing the build-id header table,
1850 * we have a build-id, so check if it is the same as the running kernel,
1851 * using it if it is.
1853 if (self->has_build_id) {
1854 u8 kallsyms_build_id[BUILD_ID_SIZE];
1855 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
1857 if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id,
1858 sizeof(kallsyms_build_id)) == 0) {
1859 if (dso__build_id_equal(self, kallsyms_build_id)) {
1860 kallsyms_filename = "/proc/kallsyms";
1865 * Now look if we have it on the build-id cache in
1866 * $HOME/.debug/[kernel.kallsyms].
1868 build_id__sprintf(self->build_id, sizeof(self->build_id),
1871 if (asprintf(&kallsyms_allocated_filename,
1872 "%s/.debug/[kernel.kallsyms]/%s",
1873 getenv("HOME"), sbuild_id) == -1) {
1874 pr_err("Not enough memory for kallsyms file lookup\n");
1878 kallsyms_filename = kallsyms_allocated_filename;
1880 if (access(kallsyms_filename, F_OK)) {
1881 pr_err("No kallsyms or vmlinux with build-id %s "
1882 "was found\n", sbuild_id);
1883 free(kallsyms_allocated_filename);
1888 * Last resort, if we don't have a build-id and couldn't find
1889 * any vmlinux file, try the running kernel kallsyms table.
1891 kallsyms_filename = "/proc/kallsyms";
1895 err = dso__load_kallsyms(self, kallsyms_filename, map, filter);
1897 pr_debug("Using %s for symbols\n", kallsyms_filename);
1898 free(kallsyms_allocated_filename);
1902 if (kallsyms_filename != NULL)
1903 dso__set_long_name(self, strdup("[kernel.kallsyms]"));
1904 map__fixup_start(map);
1905 map__fixup_end(map);
1911 static int dso__load_guest_kernel_sym(struct dso *self, struct map *map,
1912 symbol_filter_t filter)
1915 const char *kallsyms_filename = NULL;
1916 struct machine *machine;
1917 char path[PATH_MAX];
1920 pr_debug("Guest kernel map hasn't the point to groups\n");
1923 machine = map->groups->machine;
1925 if (machine__is_default_guest(machine)) {
1927 * if the user specified a vmlinux filename, use it and only
1928 * it, reporting errors to the user if it cannot be used.
1929 * Or use file guest_kallsyms inputted by user on commandline
1931 if (symbol_conf.default_guest_vmlinux_name != NULL) {
1932 err = dso__load_vmlinux(self, map,
1933 symbol_conf.default_guest_vmlinux_name, filter);
1937 kallsyms_filename = symbol_conf.default_guest_kallsyms;
1938 if (!kallsyms_filename)
1941 sprintf(path, "%s/proc/kallsyms", machine->root_dir);
1942 kallsyms_filename = path;
1945 err = dso__load_kallsyms(self, kallsyms_filename, map, filter);
1947 pr_debug("Using %s for symbols\n", kallsyms_filename);
1951 if (kallsyms_filename != NULL) {
1952 machine__mmap_name(machine, path, sizeof(path));
1953 dso__set_long_name(self, strdup(path));
1955 map__fixup_start(map);
1956 map__fixup_end(map);
1962 static void dsos__add(struct list_head *head, struct dso *dso)
1964 list_add_tail(&dso->node, head);
1967 static struct dso *dsos__find(struct list_head *head, const char *name)
1971 list_for_each_entry(pos, head, node)
1972 if (strcmp(pos->long_name, name) == 0)
1977 struct dso *__dsos__findnew(struct list_head *head, const char *name)
1979 struct dso *dso = dsos__find(head, name);
1982 dso = dso__new(name);
1984 dsos__add(head, dso);
1985 dso__set_basename(dso);
1992 size_t __dsos__fprintf(struct list_head *head, FILE *fp)
1997 list_for_each_entry(pos, head, node) {
1999 for (i = 0; i < MAP__NR_TYPES; ++i)
2000 ret += dso__fprintf(pos, i, fp);
2006 size_t machines__fprintf_dsos(struct rb_root *self, FILE *fp)
2011 for (nd = rb_first(self); nd; nd = rb_next(nd)) {
2012 struct machine *pos = rb_entry(nd, struct machine, rb_node);
2013 ret += __dsos__fprintf(&pos->kernel_dsos, fp);
2014 ret += __dsos__fprintf(&pos->user_dsos, fp);
2020 static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp,
2026 list_for_each_entry(pos, head, node) {
2027 if (with_hits && !pos->hit)
2029 ret += dso__fprintf_buildid(pos, fp);
2030 ret += fprintf(fp, " %s\n", pos->long_name);
2035 size_t machine__fprintf_dsos_buildid(struct machine *self, FILE *fp, bool with_hits)
2037 return __dsos__fprintf_buildid(&self->kernel_dsos, fp, with_hits) +
2038 __dsos__fprintf_buildid(&self->user_dsos, fp, with_hits);
2041 size_t machines__fprintf_dsos_buildid(struct rb_root *self, FILE *fp, bool with_hits)
2046 for (nd = rb_first(self); nd; nd = rb_next(nd)) {
2047 struct machine *pos = rb_entry(nd, struct machine, rb_node);
2048 ret += machine__fprintf_dsos_buildid(pos, fp, with_hits);
2053 struct dso *dso__new_kernel(const char *name)
2055 struct dso *self = dso__new(name ?: "[kernel.kallsyms]");
2058 dso__set_short_name(self, "[kernel]");
2059 self->kernel = DSO_TYPE_KERNEL;
2065 static struct dso *dso__new_guest_kernel(struct machine *machine,
2069 struct dso *self = dso__new(name ?: machine__mmap_name(machine, bf, sizeof(bf)));
2072 dso__set_short_name(self, "[guest.kernel]");
2073 self->kernel = DSO_TYPE_GUEST_KERNEL;
2079 void dso__read_running_kernel_build_id(struct dso *self, struct machine *machine)
2081 char path[PATH_MAX];
2083 if (machine__is_default_guest(machine))
2085 sprintf(path, "%s/sys/kernel/notes", machine->root_dir);
2086 if (sysfs__read_build_id(path, self->build_id,
2087 sizeof(self->build_id)) == 0)
2088 self->has_build_id = true;
2091 static struct dso *machine__create_kernel(struct machine *self)
2093 const char *vmlinux_name = NULL;
2096 if (machine__is_host(self)) {
2097 vmlinux_name = symbol_conf.vmlinux_name;
2098 kernel = dso__new_kernel(vmlinux_name);
2100 if (machine__is_default_guest(self))
2101 vmlinux_name = symbol_conf.default_guest_vmlinux_name;
2102 kernel = dso__new_guest_kernel(self, vmlinux_name);
2105 if (kernel != NULL) {
2106 dso__read_running_kernel_build_id(kernel, self);
2107 dsos__add(&self->kernel_dsos, kernel);
2112 int __machine__create_kernel_maps(struct machine *self, struct dso *kernel)
2116 for (type = 0; type < MAP__NR_TYPES; ++type) {
2119 self->vmlinux_maps[type] = map__new2(0, kernel, type);
2120 if (self->vmlinux_maps[type] == NULL)
2123 self->vmlinux_maps[type]->map_ip =
2124 self->vmlinux_maps[type]->unmap_ip = identity__map_ip;
2126 kmap = map__kmap(self->vmlinux_maps[type]);
2127 kmap->kmaps = &self->kmaps;
2128 map_groups__insert(&self->kmaps, self->vmlinux_maps[type]);
2134 void machine__destroy_kernel_maps(struct machine *self)
2138 for (type = 0; type < MAP__NR_TYPES; ++type) {
2141 if (self->vmlinux_maps[type] == NULL)
2144 kmap = map__kmap(self->vmlinux_maps[type]);
2145 map_groups__remove(&self->kmaps, self->vmlinux_maps[type]);
2146 if (kmap->ref_reloc_sym) {
2148 * ref_reloc_sym is shared among all maps, so free just
2151 if (type == MAP__FUNCTION) {
2152 free((char *)kmap->ref_reloc_sym->name);
2153 kmap->ref_reloc_sym->name = NULL;
2154 free(kmap->ref_reloc_sym);
2156 kmap->ref_reloc_sym = NULL;
2159 map__delete(self->vmlinux_maps[type]);
2160 self->vmlinux_maps[type] = NULL;
2164 int machine__create_kernel_maps(struct machine *self)
2166 struct dso *kernel = machine__create_kernel(self);
2168 if (kernel == NULL ||
2169 __machine__create_kernel_maps(self, kernel) < 0)
2172 if (symbol_conf.use_modules && machine__create_modules(self) < 0)
2173 pr_debug("Problems creating module maps, continuing anyway...\n");
2175 * Now that we have all the maps created, just set the ->end of them:
2177 map_groups__fixup_end(&self->kmaps);
2181 static void vmlinux_path__exit(void)
2183 while (--vmlinux_path__nr_entries >= 0) {
2184 free(vmlinux_path[vmlinux_path__nr_entries]);
2185 vmlinux_path[vmlinux_path__nr_entries] = NULL;
2189 vmlinux_path = NULL;
2192 static int vmlinux_path__init(void)
2197 if (uname(&uts) < 0)
2200 vmlinux_path = malloc(sizeof(char *) * 5);
2201 if (vmlinux_path == NULL)
2204 vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux");
2205 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2207 ++vmlinux_path__nr_entries;
2208 vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux");
2209 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2211 ++vmlinux_path__nr_entries;
2212 snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", uts.release);
2213 vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
2214 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2216 ++vmlinux_path__nr_entries;
2217 snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", uts.release);
2218 vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
2219 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2221 ++vmlinux_path__nr_entries;
2222 snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux",
2224 vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
2225 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2227 ++vmlinux_path__nr_entries;
2232 vmlinux_path__exit();
2236 size_t machine__fprintf_vmlinux_path(struct machine *self, FILE *fp)
2240 struct dso *kdso = self->vmlinux_maps[MAP__FUNCTION]->dso;
2242 if (kdso->has_build_id) {
2243 char filename[PATH_MAX];
2244 if (dso__build_id_filename(kdso, filename, sizeof(filename)))
2245 printed += fprintf(fp, "[0] %s\n", filename);
2248 for (i = 0; i < vmlinux_path__nr_entries; ++i)
2249 printed += fprintf(fp, "[%d] %s\n",
2250 i + kdso->has_build_id, vmlinux_path[i]);
2255 static int setup_list(struct strlist **list, const char *list_str,
2256 const char *list_name)
2258 if (list_str == NULL)
2261 *list = strlist__new(true, list_str);
2263 pr_err("problems parsing %s list\n", list_name);
2269 int symbol__init(void)
2271 elf_version(EV_CURRENT);
2272 if (symbol_conf.sort_by_name)
2273 symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) -
2274 sizeof(struct symbol));
2276 if (symbol_conf.try_vmlinux_path && vmlinux_path__init() < 0)
2279 if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') {
2280 pr_err("'.' is the only non valid --field-separator argument\n");
2284 if (setup_list(&symbol_conf.dso_list,
2285 symbol_conf.dso_list_str, "dso") < 0)
2288 if (setup_list(&symbol_conf.comm_list,
2289 symbol_conf.comm_list_str, "comm") < 0)
2290 goto out_free_dso_list;
2292 if (setup_list(&symbol_conf.sym_list,
2293 symbol_conf.sym_list_str, "symbol") < 0)
2294 goto out_free_comm_list;
2299 strlist__delete(symbol_conf.dso_list);
2301 strlist__delete(symbol_conf.comm_list);
2305 void symbol__exit(void)
2307 strlist__delete(symbol_conf.sym_list);
2308 strlist__delete(symbol_conf.dso_list);
2309 strlist__delete(symbol_conf.comm_list);
2310 vmlinux_path__exit();
2311 symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL;
2314 int machines__create_kernel_maps(struct rb_root *self, pid_t pid)
2316 struct machine *machine = machines__findnew(self, pid);
2318 if (machine == NULL)
2321 return machine__create_kernel_maps(machine);
2324 static int hex(char ch)
2326 if ((ch >= '0') && (ch <= '9'))
2328 if ((ch >= 'a') && (ch <= 'f'))
2329 return ch - 'a' + 10;
2330 if ((ch >= 'A') && (ch <= 'F'))
2331 return ch - 'A' + 10;
2336 * While we find nice hex chars, build a long_val.
2337 * Return number of chars processed.
2339 int hex2u64(const char *ptr, u64 *long_val)
2341 const char *p = ptr;
2345 const int hex_val = hex(*p);
2350 *long_val = (*long_val << 4) | hex_val;
2357 char *strxfrchar(char *s, char from, char to)
2361 while ((p = strchr(p, from)) != NULL)
2367 int machines__create_guest_kernel_maps(struct rb_root *self)
2370 struct dirent **namelist = NULL;
2372 char path[PATH_MAX];
2375 if (symbol_conf.default_guest_vmlinux_name ||
2376 symbol_conf.default_guest_modules ||
2377 symbol_conf.default_guest_kallsyms) {
2378 machines__create_kernel_maps(self, DEFAULT_GUEST_KERNEL_ID);
2381 if (symbol_conf.guestmount) {
2382 items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL);
2385 for (i = 0; i < items; i++) {
2386 if (!isdigit(namelist[i]->d_name[0])) {
2387 /* Filter out . and .. */
2390 pid = atoi(namelist[i]->d_name);
2391 sprintf(path, "%s/%s/proc/kallsyms",
2392 symbol_conf.guestmount,
2393 namelist[i]->d_name);
2394 ret = access(path, R_OK);
2396 pr_debug("Can't access file %s\n", path);
2399 machines__create_kernel_maps(self, pid);
2408 void machines__destroy_guest_kernel_maps(struct rb_root *self)
2410 struct rb_node *next = rb_first(self);
2413 struct machine *pos = rb_entry(next, struct machine, rb_node);
2415 next = rb_next(&pos->rb_node);
2416 rb_erase(&pos->rb_node, self);
2417 machine__delete(pos);
2421 int machine__load_kallsyms(struct machine *self, const char *filename,
2422 enum map_type type, symbol_filter_t filter)
2424 struct map *map = self->vmlinux_maps[type];
2425 int ret = dso__load_kallsyms(map->dso, filename, map, filter);
2428 dso__set_loaded(map->dso, type);
2430 * Since /proc/kallsyms will have multiple sessions for the
2431 * kernel, with modules between them, fixup the end of all
2434 __map_groups__fixup_end(&self->kmaps, type);
2440 int machine__load_vmlinux_path(struct machine *self, enum map_type type,
2441 symbol_filter_t filter)
2443 struct map *map = self->vmlinux_maps[type];
2444 int ret = dso__load_vmlinux_path(map->dso, map, filter);
2447 dso__set_loaded(map->dso, type);
2448 map__reloc_vmlinux(map);