11 #include <sys/param.h>
23 #include <sys/utsname.h>
25 #ifndef NT_GNU_BUILD_ID
26 #define NT_GNU_BUILD_ID 3
29 static bool dso__build_id_equal(const struct dso *self, u8 *build_id);
30 static int elf_read_build_id(Elf *elf, void *bf, size_t size);
31 static void dsos__add(struct list_head *head, struct dso *dso);
32 static struct map *map__new2(u64 start, struct dso *dso, enum map_type type);
33 static int dso__load_kernel_sym(struct dso *self, struct map *map,
34 symbol_filter_t filter);
35 static int dso__load_guest_kernel_sym(struct dso *self, struct map *map,
36 symbol_filter_t filter);
37 static int vmlinux_path__nr_entries;
38 static char **vmlinux_path;
40 struct symbol_conf symbol_conf = {
41 .exclude_other = true,
43 .try_vmlinux_path = true,
46 int dso__name_len(const struct dso *self)
49 return self->long_name_len;
51 return self->short_name_len;
54 bool dso__loaded(const struct dso *self, enum map_type type)
56 return self->loaded & (1 << type);
59 bool dso__sorted_by_name(const struct dso *self, enum map_type type)
61 return self->sorted_by_name & (1 << type);
64 static void dso__set_sorted_by_name(struct dso *self, enum map_type type)
66 self->sorted_by_name |= (1 << type);
69 bool symbol_type__is_a(char symbol_type, enum map_type map_type)
73 return symbol_type == 'T' || symbol_type == 'W';
75 return symbol_type == 'D' || symbol_type == 'd';
81 static void symbols__fixup_end(struct rb_root *self)
83 struct rb_node *nd, *prevnd = rb_first(self);
84 struct symbol *curr, *prev;
89 curr = rb_entry(prevnd, struct symbol, rb_node);
91 for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) {
93 curr = rb_entry(nd, struct symbol, rb_node);
95 if (prev->end == prev->start)
96 prev->end = curr->start - 1;
100 if (curr->end == curr->start)
101 curr->end = roundup(curr->start, 4096);
104 static void __map_groups__fixup_end(struct map_groups *self, enum map_type type)
106 struct map *prev, *curr;
107 struct rb_node *nd, *prevnd = rb_first(&self->maps[type]);
112 curr = rb_entry(prevnd, struct map, rb_node);
114 for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) {
116 curr = rb_entry(nd, struct map, rb_node);
117 prev->end = curr->start - 1;
121 * We still haven't the actual symbols, so guess the
122 * last map final address.
127 static void map_groups__fixup_end(struct map_groups *self)
130 for (i = 0; i < MAP__NR_TYPES; ++i)
131 __map_groups__fixup_end(self, i);
134 static struct symbol *symbol__new(u64 start, u64 len, u8 binding,
137 size_t namelen = strlen(name) + 1;
138 struct symbol *self = calloc(1, (symbol_conf.priv_size +
139 sizeof(*self) + namelen));
143 if (symbol_conf.priv_size)
144 self = ((void *)self) + symbol_conf.priv_size;
147 self->end = len ? start + len - 1 : start;
148 self->binding = binding;
149 self->namelen = namelen - 1;
151 pr_debug4("%s: %s %#Lx-%#Lx\n", __func__, name, start, self->end);
153 memcpy(self->name, name, namelen);
158 void symbol__delete(struct symbol *self)
160 free(((void *)self) - symbol_conf.priv_size);
163 static size_t symbol__fprintf(struct symbol *self, FILE *fp)
165 return fprintf(fp, " %llx-%llx %c %s\n",
166 self->start, self->end,
167 self->binding == STB_GLOBAL ? 'g' :
168 self->binding == STB_LOCAL ? 'l' : 'w',
172 void dso__set_long_name(struct dso *self, char *name)
176 self->long_name = name;
177 self->long_name_len = strlen(name);
180 static void dso__set_short_name(struct dso *self, const char *name)
184 self->short_name = name;
185 self->short_name_len = strlen(name);
188 static void dso__set_basename(struct dso *self)
190 dso__set_short_name(self, basename(self->long_name));
193 struct dso *dso__new(const char *name)
195 struct dso *self = calloc(1, sizeof(*self) + strlen(name) + 1);
199 strcpy(self->name, name);
200 dso__set_long_name(self, self->name);
201 dso__set_short_name(self, self->name);
202 for (i = 0; i < MAP__NR_TYPES; ++i)
203 self->symbols[i] = self->symbol_names[i] = RB_ROOT;
204 self->slen_calculated = 0;
205 self->origin = DSO__ORIG_NOT_FOUND;
207 self->sorted_by_name = 0;
208 self->has_build_id = 0;
209 self->kernel = DSO_TYPE_USER;
210 INIT_LIST_HEAD(&self->node);
216 static void symbols__delete(struct rb_root *self)
219 struct rb_node *next = rb_first(self);
222 pos = rb_entry(next, struct symbol, rb_node);
223 next = rb_next(&pos->rb_node);
224 rb_erase(&pos->rb_node, self);
229 void dso__delete(struct dso *self)
232 for (i = 0; i < MAP__NR_TYPES; ++i)
233 symbols__delete(&self->symbols[i]);
234 if (self->sname_alloc)
235 free((char *)self->short_name);
236 if (self->lname_alloc)
237 free(self->long_name);
241 void dso__set_build_id(struct dso *self, void *build_id)
243 memcpy(self->build_id, build_id, sizeof(self->build_id));
244 self->has_build_id = 1;
247 static void symbols__insert(struct rb_root *self, struct symbol *sym)
249 struct rb_node **p = &self->rb_node;
250 struct rb_node *parent = NULL;
251 const u64 ip = sym->start;
256 s = rb_entry(parent, struct symbol, rb_node);
262 rb_link_node(&sym->rb_node, parent, p);
263 rb_insert_color(&sym->rb_node, self);
266 static struct symbol *symbols__find(struct rb_root *self, u64 ip)
276 struct symbol *s = rb_entry(n, struct symbol, rb_node);
280 else if (ip > s->end)
289 struct symbol_name_rb_node {
290 struct rb_node rb_node;
294 static void symbols__insert_by_name(struct rb_root *self, struct symbol *sym)
296 struct rb_node **p = &self->rb_node;
297 struct rb_node *parent = NULL;
298 struct symbol_name_rb_node *symn, *s;
300 symn = container_of(sym, struct symbol_name_rb_node, sym);
304 s = rb_entry(parent, struct symbol_name_rb_node, rb_node);
305 if (strcmp(sym->name, s->sym.name) < 0)
310 rb_link_node(&symn->rb_node, parent, p);
311 rb_insert_color(&symn->rb_node, self);
314 static void symbols__sort_by_name(struct rb_root *self, struct rb_root *source)
318 for (nd = rb_first(source); nd; nd = rb_next(nd)) {
319 struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
320 symbols__insert_by_name(self, pos);
324 static struct symbol *symbols__find_by_name(struct rb_root *self, const char *name)
334 struct symbol_name_rb_node *s;
337 s = rb_entry(n, struct symbol_name_rb_node, rb_node);
338 cmp = strcmp(name, s->sym.name);
351 struct symbol *dso__find_symbol(struct dso *self,
352 enum map_type type, u64 addr)
354 return symbols__find(&self->symbols[type], addr);
357 struct symbol *dso__find_symbol_by_name(struct dso *self, enum map_type type,
360 return symbols__find_by_name(&self->symbol_names[type], name);
363 void dso__sort_by_name(struct dso *self, enum map_type type)
365 dso__set_sorted_by_name(self, type);
366 return symbols__sort_by_name(&self->symbol_names[type],
367 &self->symbols[type]);
370 int build_id__sprintf(const u8 *self, int len, char *bf)
373 const u8 *raw = self;
376 for (i = 0; i < len; ++i) {
377 sprintf(bid, "%02x", *raw);
385 size_t dso__fprintf_buildid(struct dso *self, FILE *fp)
387 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
389 build_id__sprintf(self->build_id, sizeof(self->build_id), sbuild_id);
390 return fprintf(fp, "%s", sbuild_id);
393 size_t dso__fprintf_symbols_by_name(struct dso *self, enum map_type type, FILE *fp)
397 struct symbol_name_rb_node *pos;
399 for (nd = rb_first(&self->symbol_names[type]); nd; nd = rb_next(nd)) {
400 pos = rb_entry(nd, struct symbol_name_rb_node, rb_node);
401 fprintf(fp, "%s\n", pos->sym.name);
407 size_t dso__fprintf(struct dso *self, enum map_type type, FILE *fp)
410 size_t ret = fprintf(fp, "dso: %s (", self->short_name);
412 if (self->short_name != self->long_name)
413 ret += fprintf(fp, "%s, ", self->long_name);
414 ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type],
415 self->loaded ? "" : "NOT ");
416 ret += dso__fprintf_buildid(self, fp);
417 ret += fprintf(fp, ")\n");
418 for (nd = rb_first(&self->symbols[type]); nd; nd = rb_next(nd)) {
419 struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
420 ret += symbol__fprintf(pos, fp);
426 int kallsyms__parse(const char *filename, void *arg,
427 int (*process_symbol)(void *arg, const char *name,
428 char type, u64 start))
433 FILE *file = fopen(filename, "r");
438 while (!feof(file)) {
444 line_len = getline(&line, &n, file);
445 if (line_len < 0 || !line)
448 line[--line_len] = '\0'; /* \n */
450 len = hex2u64(line, &start);
453 if (len + 2 >= line_len)
456 symbol_type = toupper(line[len]);
457 symbol_name = line + len + 2;
459 err = process_symbol(arg, symbol_name, symbol_type, start);
472 struct process_kallsyms_args {
477 static u8 kallsyms2elf_type(char type)
482 return isupper(type) ? STB_GLOBAL : STB_LOCAL;
485 static int map__process_kallsym_symbol(void *arg, const char *name,
486 char type, u64 start)
489 struct process_kallsyms_args *a = arg;
490 struct rb_root *root = &a->dso->symbols[a->map->type];
492 if (!symbol_type__is_a(type, a->map->type))
496 * Will fix up the end later, when we have all symbols sorted.
498 sym = symbol__new(start, 0, kallsyms2elf_type(type), name);
503 * We will pass the symbols to the filter later, in
504 * map__split_kallsyms, when we have split the maps per module
506 symbols__insert(root, sym);
512 * Loads the function entries in /proc/kallsyms into kernel_map->dso,
513 * so that we can in the next step set the symbol ->end address and then
514 * call kernel_maps__split_kallsyms.
516 static int dso__load_all_kallsyms(struct dso *self, const char *filename,
519 struct process_kallsyms_args args = { .map = map, .dso = self, };
520 return kallsyms__parse(filename, &args, map__process_kallsym_symbol);
524 * Split the symbols into maps, making sure there are no overlaps, i.e. the
525 * kernel range is broken in several maps, named [kernel].N, as we don't have
526 * the original ELF section names vmlinux have.
528 static int dso__split_kallsyms(struct dso *self, struct map *map,
529 symbol_filter_t filter)
531 struct map_groups *kmaps = map__kmap(map)->kmaps;
532 struct machine *machine = kmaps->machine;
533 struct map *curr_map = map;
535 int count = 0, moved = 0;
536 struct rb_root *root = &self->symbols[map->type];
537 struct rb_node *next = rb_first(root);
538 int kernel_range = 0;
543 pos = rb_entry(next, struct symbol, rb_node);
544 next = rb_next(&pos->rb_node);
546 module = strchr(pos->name, '\t');
548 if (!symbol_conf.use_modules)
553 if (strcmp(curr_map->dso->short_name, module)) {
554 if (curr_map != map &&
555 self->kernel == DSO_TYPE_GUEST_KERNEL &&
556 machine__is_default_guest(machine)) {
558 * We assume all symbols of a module are
559 * continuous in * kallsyms, so curr_map
560 * points to a module and all its
561 * symbols are in its kmap. Mark it as
564 dso__set_loaded(curr_map->dso,
568 curr_map = map_groups__find_by_name(kmaps,
570 if (curr_map == NULL) {
571 pr_debug("%s/proc/{kallsyms,modules} "
572 "inconsistency while looking "
573 "for \"%s\" module!\n",
574 machine->root_dir, module);
579 if (curr_map->dso->loaded &&
580 !machine__is_default_guest(machine))
584 * So that we look just like we get from .ko files,
585 * i.e. not prelinked, relative to map->start.
587 pos->start = curr_map->map_ip(curr_map, pos->start);
588 pos->end = curr_map->map_ip(curr_map, pos->end);
589 } else if (curr_map != map) {
590 char dso_name[PATH_MAX];
598 if (self->kernel == DSO_TYPE_GUEST_KERNEL)
599 snprintf(dso_name, sizeof(dso_name),
603 snprintf(dso_name, sizeof(dso_name),
607 dso = dso__new(dso_name);
611 dso->kernel = self->kernel;
613 curr_map = map__new2(pos->start, dso, map->type);
614 if (curr_map == NULL) {
619 curr_map->map_ip = curr_map->unmap_ip = identity__map_ip;
620 map_groups__insert(kmaps, curr_map);
624 if (filter && filter(curr_map, pos)) {
625 discard_symbol: rb_erase(&pos->rb_node, root);
628 if (curr_map != map) {
629 rb_erase(&pos->rb_node, root);
630 symbols__insert(&curr_map->dso->symbols[curr_map->type], pos);
637 if (curr_map != map &&
638 self->kernel == DSO_TYPE_GUEST_KERNEL &&
639 machine__is_default_guest(kmaps->machine)) {
640 dso__set_loaded(curr_map->dso, curr_map->type);
643 return count + moved;
646 int dso__load_kallsyms(struct dso *self, const char *filename,
647 struct map *map, symbol_filter_t filter)
649 if (dso__load_all_kallsyms(self, filename, map) < 0)
652 symbols__fixup_end(&self->symbols[map->type]);
653 if (self->kernel == DSO_TYPE_GUEST_KERNEL)
654 self->origin = DSO__ORIG_GUEST_KERNEL;
656 self->origin = DSO__ORIG_KERNEL;
658 return dso__split_kallsyms(self, map, filter);
661 static int dso__load_perf_map(struct dso *self, struct map *map,
662 symbol_filter_t filter)
669 file = fopen(self->long_name, "r");
673 while (!feof(file)) {
678 line_len = getline(&line, &n, file);
685 line[--line_len] = '\0'; /* \n */
687 len = hex2u64(line, &start);
690 if (len + 2 >= line_len)
693 len += hex2u64(line + len, &size);
696 if (len + 2 >= line_len)
699 sym = symbol__new(start, size, STB_GLOBAL, line + len);
702 goto out_delete_line;
704 if (filter && filter(map, sym))
707 symbols__insert(&self->symbols[map->type], sym);
724 * elf_symtab__for_each_symbol - iterate thru all the symbols
726 * @self: struct elf_symtab instance to iterate
728 * @sym: GElf_Sym iterator
730 #define elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) \
731 for (idx = 0, gelf_getsym(syms, idx, &sym);\
733 idx++, gelf_getsym(syms, idx, &sym))
735 static inline uint8_t elf_sym__type(const GElf_Sym *sym)
737 return GELF_ST_TYPE(sym->st_info);
740 static inline int elf_sym__is_function(const GElf_Sym *sym)
742 return elf_sym__type(sym) == STT_FUNC &&
744 sym->st_shndx != SHN_UNDEF;
747 static inline bool elf_sym__is_object(const GElf_Sym *sym)
749 return elf_sym__type(sym) == STT_OBJECT &&
751 sym->st_shndx != SHN_UNDEF;
754 static inline int elf_sym__is_label(const GElf_Sym *sym)
756 return elf_sym__type(sym) == STT_NOTYPE &&
758 sym->st_shndx != SHN_UNDEF &&
759 sym->st_shndx != SHN_ABS;
762 static inline const char *elf_sec__name(const GElf_Shdr *shdr,
763 const Elf_Data *secstrs)
765 return secstrs->d_buf + shdr->sh_name;
768 static inline int elf_sec__is_text(const GElf_Shdr *shdr,
769 const Elf_Data *secstrs)
771 return strstr(elf_sec__name(shdr, secstrs), "text") != NULL;
774 static inline bool elf_sec__is_data(const GElf_Shdr *shdr,
775 const Elf_Data *secstrs)
777 return strstr(elf_sec__name(shdr, secstrs), "data") != NULL;
780 static inline const char *elf_sym__name(const GElf_Sym *sym,
781 const Elf_Data *symstrs)
783 return symstrs->d_buf + sym->st_name;
786 static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
787 GElf_Shdr *shp, const char *name,
793 while ((sec = elf_nextscn(elf, sec)) != NULL) {
796 gelf_getshdr(sec, shp);
797 str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name);
798 if (!strcmp(name, str)) {
809 #define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \
810 for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \
812 ++idx, pos = gelf_getrel(reldata, idx, &pos_mem))
814 #define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \
815 for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \
817 ++idx, pos = gelf_getrela(reldata, idx, &pos_mem))
820 * We need to check if we have a .dynsym, so that we can handle the
821 * .plt, synthesizing its symbols, that aren't on the symtabs (be it
822 * .dynsym or .symtab).
823 * And always look at the original dso, not at debuginfo packages, that
824 * have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS).
826 static int dso__synthesize_plt_symbols(struct dso *self, struct map *map,
827 symbol_filter_t filter)
829 uint32_t nr_rel_entries, idx;
834 GElf_Shdr shdr_rel_plt, shdr_dynsym;
835 Elf_Data *reldata, *syms, *symstrs;
836 Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym;
839 char sympltname[1024];
841 int nr = 0, symidx, fd, err = 0;
843 fd = open(self->long_name, O_RDONLY);
847 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
851 if (gelf_getehdr(elf, &ehdr) == NULL)
854 scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym,
855 ".dynsym", &dynsym_idx);
856 if (scn_dynsym == NULL)
859 scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,
861 if (scn_plt_rel == NULL) {
862 scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,
864 if (scn_plt_rel == NULL)
870 if (shdr_rel_plt.sh_link != dynsym_idx)
873 if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL)
877 * Fetch the relocation section to find the idxes to the GOT
878 * and the symbols in the .dynsym they refer to.
880 reldata = elf_getdata(scn_plt_rel, NULL);
884 syms = elf_getdata(scn_dynsym, NULL);
888 scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link);
889 if (scn_symstrs == NULL)
892 symstrs = elf_getdata(scn_symstrs, NULL);
896 nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize;
897 plt_offset = shdr_plt.sh_offset;
899 if (shdr_rel_plt.sh_type == SHT_RELA) {
900 GElf_Rela pos_mem, *pos;
902 elf_section__for_each_rela(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);
922 } else if (shdr_rel_plt.sh_type == SHT_REL) {
923 GElf_Rel pos_mem, *pos;
924 elf_section__for_each_rel(reldata, pos, pos_mem, idx,
926 symidx = GELF_R_SYM(pos->r_info);
927 plt_offset += shdr_plt.sh_entsize;
928 gelf_getsym(syms, symidx, &sym);
929 snprintf(sympltname, sizeof(sympltname),
930 "%s@plt", elf_sym__name(&sym, symstrs));
932 f = symbol__new(plt_offset, shdr_plt.sh_entsize,
933 STB_GLOBAL, sympltname);
937 if (filter && filter(map, f))
940 symbols__insert(&self->symbols[map->type], f);
955 pr_debug("%s: problems reading %s PLT info.\n",
956 __func__, self->long_name);
960 static bool elf_sym__is_a(GElf_Sym *self, enum map_type type)
964 return elf_sym__is_function(self);
966 return elf_sym__is_object(self);
972 static bool elf_sec__is_a(GElf_Shdr *self, Elf_Data *secstrs, enum map_type type)
976 return elf_sec__is_text(self, secstrs);
978 return elf_sec__is_data(self, secstrs);
984 static size_t elf_addr_to_index(Elf *elf, GElf_Addr addr)
990 while ((sec = elf_nextscn(elf, sec)) != NULL) {
991 gelf_getshdr(sec, &shdr);
993 if ((addr >= shdr.sh_addr) &&
994 (addr < (shdr.sh_addr + shdr.sh_size)))
1003 static int dso__load_sym(struct dso *self, struct map *map, const char *name,
1004 int fd, symbol_filter_t filter, int kmodule,
1007 struct kmap *kmap = self->kernel ? map__kmap(map) : NULL;
1008 struct map *curr_map = map;
1009 struct dso *curr_dso = self;
1010 Elf_Data *symstrs, *secstrs;
1015 GElf_Shdr shdr, opdshdr;
1016 Elf_Data *syms, *opddata = NULL;
1018 Elf_Scn *sec, *sec_strndx, *opdsec;
1023 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
1025 pr_debug("%s: cannot read %s ELF file.\n", __func__, name);
1029 if (gelf_getehdr(elf, &ehdr) == NULL) {
1030 pr_debug("%s: cannot get elf header.\n", __func__);
1034 /* Always reject images with a mismatched build-id: */
1035 if (self->has_build_id) {
1036 u8 build_id[BUILD_ID_SIZE];
1038 if (elf_read_build_id(elf, build_id,
1039 BUILD_ID_SIZE) != BUILD_ID_SIZE)
1042 if (!dso__build_id_equal(self, build_id))
1046 sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL);
1051 sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL);
1056 opdsec = elf_section_by_name(elf, &ehdr, &opdshdr, ".opd", &opdidx);
1058 opddata = elf_rawdata(opdsec, NULL);
1060 syms = elf_getdata(sec, NULL);
1064 sec = elf_getscn(elf, shdr.sh_link);
1068 symstrs = elf_getdata(sec, NULL);
1069 if (symstrs == NULL)
1072 sec_strndx = elf_getscn(elf, ehdr.e_shstrndx);
1073 if (sec_strndx == NULL)
1076 secstrs = elf_getdata(sec_strndx, NULL);
1077 if (secstrs == NULL)
1080 nr_syms = shdr.sh_size / shdr.sh_entsize;
1082 memset(&sym, 0, sizeof(sym));
1083 if (self->kernel == DSO_TYPE_USER) {
1084 self->adjust_symbols = (ehdr.e_type == ET_EXEC ||
1085 elf_section_by_name(elf, &ehdr, &shdr,
1086 ".gnu.prelink_undo",
1088 } else self->adjust_symbols = 0;
1090 elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) {
1092 const char *elf_name = elf_sym__name(&sym, symstrs);
1093 char *demangled = NULL;
1094 int is_label = elf_sym__is_label(&sym);
1095 const char *section_name;
1097 if (kmap && kmap->ref_reloc_sym && kmap->ref_reloc_sym->name &&
1098 strcmp(elf_name, kmap->ref_reloc_sym->name) == 0)
1099 kmap->ref_reloc_sym->unrelocated_addr = sym.st_value;
1101 if (!is_label && !elf_sym__is_a(&sym, map->type))
1104 /* Reject ARM ELF "mapping symbols": these aren't unique and
1105 * don't identify functions, so will confuse the profile
1107 if (ehdr.e_machine == EM_ARM) {
1108 if (!strcmp(elf_name, "$a") ||
1109 !strcmp(elf_name, "$d") ||
1110 !strcmp(elf_name, "$t"))
1114 if (opdsec && sym.st_shndx == opdidx) {
1115 u32 offset = sym.st_value - opdshdr.sh_addr;
1116 u64 *opd = opddata->d_buf + offset;
1117 sym.st_value = *opd;
1118 sym.st_shndx = elf_addr_to_index(elf, sym.st_value);
1121 sec = elf_getscn(elf, sym.st_shndx);
1125 gelf_getshdr(sec, &shdr);
1127 if (is_label && !elf_sec__is_a(&shdr, secstrs, map->type))
1130 section_name = elf_sec__name(&shdr, secstrs);
1132 if (self->kernel != DSO_TYPE_USER || kmodule) {
1133 char dso_name[PATH_MAX];
1135 if (strcmp(section_name,
1136 (curr_dso->short_name +
1137 self->short_name_len)) == 0)
1140 if (strcmp(section_name, ".text") == 0) {
1146 snprintf(dso_name, sizeof(dso_name),
1147 "%s%s", self->short_name, section_name);
1149 curr_map = map_groups__find_by_name(kmap->kmaps, map->type, dso_name);
1150 if (curr_map == NULL) {
1151 u64 start = sym.st_value;
1154 start += map->start + shdr.sh_offset;
1156 curr_dso = dso__new(dso_name);
1157 if (curr_dso == NULL)
1159 curr_dso->kernel = self->kernel;
1160 curr_map = map__new2(start, curr_dso,
1162 if (curr_map == NULL) {
1163 dso__delete(curr_dso);
1166 curr_map->map_ip = identity__map_ip;
1167 curr_map->unmap_ip = identity__map_ip;
1168 curr_dso->origin = self->origin;
1169 map_groups__insert(kmap->kmaps, curr_map);
1170 dsos__add(&self->node, curr_dso);
1171 dso__set_loaded(curr_dso, map->type);
1173 curr_dso = curr_map->dso;
1178 if (curr_dso->adjust_symbols) {
1179 pr_debug4("%s: adjusting symbol: st_value: %#Lx "
1180 "sh_addr: %#Lx sh_offset: %#Lx\n", __func__,
1181 (u64)sym.st_value, (u64)shdr.sh_addr,
1182 (u64)shdr.sh_offset);
1183 sym.st_value -= shdr.sh_addr - shdr.sh_offset;
1186 * We need to figure out if the object was created from C++ sources
1187 * DWARF DW_compile_unit has this, but we don't always have access
1190 demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI);
1191 if (demangled != NULL)
1192 elf_name = demangled;
1194 f = symbol__new(sym.st_value, sym.st_size,
1195 GELF_ST_BIND(sym.st_info), elf_name);
1200 if (filter && filter(curr_map, f))
1203 symbols__insert(&curr_dso->symbols[curr_map->type], f);
1209 * For misannotated, zeroed, ASM function sizes.
1212 symbols__fixup_end(&self->symbols[map->type]);
1215 * We need to fixup this here too because we create new
1216 * maps here, for things like vsyscall sections.
1218 __map_groups__fixup_end(kmap->kmaps, map->type);
1228 static bool dso__build_id_equal(const struct dso *self, u8 *build_id)
1230 return memcmp(self->build_id, build_id, sizeof(self->build_id)) == 0;
1233 bool __dsos__read_build_ids(struct list_head *head, bool with_hits)
1235 bool have_build_id = false;
1238 list_for_each_entry(pos, head, node) {
1239 if (with_hits && !pos->hit)
1241 if (pos->has_build_id) {
1242 have_build_id = true;
1245 if (filename__read_build_id(pos->long_name, pos->build_id,
1246 sizeof(pos->build_id)) > 0) {
1247 have_build_id = true;
1248 pos->has_build_id = true;
1252 return have_build_id;
1256 * Align offset to 4 bytes as needed for note name and descriptor data.
1258 #define NOTE_ALIGN(n) (((n) + 3) & -4U)
1260 static int elf_read_build_id(Elf *elf, void *bf, size_t size)
1270 if (size < BUILD_ID_SIZE)
1274 if (ek != ELF_K_ELF)
1277 if (gelf_getehdr(elf, &ehdr) == NULL) {
1278 pr_err("%s: cannot get elf header.\n", __func__);
1282 sec = elf_section_by_name(elf, &ehdr, &shdr,
1283 ".note.gnu.build-id", NULL);
1285 sec = elf_section_by_name(elf, &ehdr, &shdr,
1291 data = elf_getdata(sec, NULL);
1296 while (ptr < (data->d_buf + data->d_size)) {
1297 GElf_Nhdr *nhdr = ptr;
1298 int namesz = NOTE_ALIGN(nhdr->n_namesz),
1299 descsz = NOTE_ALIGN(nhdr->n_descsz);
1302 ptr += sizeof(*nhdr);
1305 if (nhdr->n_type == NT_GNU_BUILD_ID &&
1306 nhdr->n_namesz == sizeof("GNU")) {
1307 if (memcmp(name, "GNU", sizeof("GNU")) == 0) {
1308 memcpy(bf, ptr, BUILD_ID_SIZE);
1309 err = BUILD_ID_SIZE;
1320 int filename__read_build_id(const char *filename, void *bf, size_t size)
1325 if (size < BUILD_ID_SIZE)
1328 fd = open(filename, O_RDONLY);
1332 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
1334 pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename);
1338 err = elf_read_build_id(elf, bf, size);
1347 int sysfs__read_build_id(const char *filename, void *build_id, size_t size)
1351 if (size < BUILD_ID_SIZE)
1354 fd = open(filename, O_RDONLY);
1363 if (read(fd, &nhdr, sizeof(nhdr)) != sizeof(nhdr))
1366 namesz = NOTE_ALIGN(nhdr.n_namesz);
1367 descsz = NOTE_ALIGN(nhdr.n_descsz);
1368 if (nhdr.n_type == NT_GNU_BUILD_ID &&
1369 nhdr.n_namesz == sizeof("GNU")) {
1370 if (read(fd, bf, namesz) != namesz)
1372 if (memcmp(bf, "GNU", sizeof("GNU")) == 0) {
1373 if (read(fd, build_id,
1374 BUILD_ID_SIZE) == BUILD_ID_SIZE) {
1378 } else if (read(fd, bf, descsz) != descsz)
1381 int n = namesz + descsz;
1382 if (read(fd, bf, n) != n)
1391 char dso__symtab_origin(const struct dso *self)
1393 static const char origin[] = {
1394 [DSO__ORIG_KERNEL] = 'k',
1395 [DSO__ORIG_JAVA_JIT] = 'j',
1396 [DSO__ORIG_BUILD_ID_CACHE] = 'B',
1397 [DSO__ORIG_FEDORA] = 'f',
1398 [DSO__ORIG_UBUNTU] = 'u',
1399 [DSO__ORIG_BUILDID] = 'b',
1400 [DSO__ORIG_DSO] = 'd',
1401 [DSO__ORIG_KMODULE] = 'K',
1402 [DSO__ORIG_GUEST_KERNEL] = 'g',
1403 [DSO__ORIG_GUEST_KMODULE] = 'G',
1406 if (self == NULL || self->origin == DSO__ORIG_NOT_FOUND)
1408 return origin[self->origin];
1411 int dso__load(struct dso *self, struct map *map, symbol_filter_t filter)
1413 int size = PATH_MAX;
1417 struct machine *machine;
1418 const char *root_dir;
1421 dso__set_loaded(self, map->type);
1423 if (self->kernel == DSO_TYPE_KERNEL)
1424 return dso__load_kernel_sym(self, map, filter);
1425 else if (self->kernel == DSO_TYPE_GUEST_KERNEL)
1426 return dso__load_guest_kernel_sym(self, map, filter);
1428 if (map->groups && map->groups->machine)
1429 machine = map->groups->machine;
1433 name = malloc(size);
1437 self->adjust_symbols = 0;
1439 if (strncmp(self->name, "/tmp/perf-", 10) == 0) {
1440 ret = dso__load_perf_map(self, map, filter);
1441 self->origin = ret > 0 ? DSO__ORIG_JAVA_JIT :
1442 DSO__ORIG_NOT_FOUND;
1446 /* Iterate over candidate debug images.
1447 * On the first pass, only load images if they have a full symtab.
1448 * Failing that, do a second pass where we accept .dynsym also
1450 for (self->origin = DSO__ORIG_BUILD_ID_CACHE, want_symtab = 1;
1451 self->origin != DSO__ORIG_NOT_FOUND;
1453 switch (self->origin) {
1454 case DSO__ORIG_BUILD_ID_CACHE:
1455 if (dso__build_id_filename(self, name, size) == NULL)
1458 case DSO__ORIG_FEDORA:
1459 snprintf(name, size, "/usr/lib/debug%s.debug",
1462 case DSO__ORIG_UBUNTU:
1463 snprintf(name, size, "/usr/lib/debug%s",
1466 case DSO__ORIG_BUILDID: {
1467 char build_id_hex[BUILD_ID_SIZE * 2 + 1];
1469 if (!self->has_build_id)
1472 build_id__sprintf(self->build_id,
1473 sizeof(self->build_id),
1475 snprintf(name, size,
1476 "/usr/lib/debug/.build-id/%.2s/%s.debug",
1477 build_id_hex, build_id_hex + 2);
1481 snprintf(name, size, "%s", self->long_name);
1483 case DSO__ORIG_GUEST_KMODULE:
1484 if (map->groups && map->groups->machine)
1485 root_dir = map->groups->machine->root_dir;
1488 snprintf(name, size, "%s%s", root_dir, self->long_name);
1493 * If we wanted a full symtab but no image had one,
1494 * relax our requirements and repeat the search.
1498 self->origin = DSO__ORIG_BUILD_ID_CACHE;
1503 /* Name is now the name of the next image to try */
1504 fd = open(name, O_RDONLY);
1508 ret = dso__load_sym(self, map, name, fd, filter, 0,
1513 * Some people seem to have debuginfo files _WITHOUT_ debug
1520 int nr_plt = dso__synthesize_plt_symbols(self, map, filter);
1528 if (ret < 0 && strstr(self->name, " (deleted)") != NULL)
1533 struct map *map_groups__find_by_name(struct map_groups *self,
1534 enum map_type type, const char *name)
1538 for (nd = rb_first(&self->maps[type]); nd; nd = rb_next(nd)) {
1539 struct map *map = rb_entry(nd, struct map, rb_node);
1541 if (map->dso && strcmp(map->dso->short_name, name) == 0)
1548 static int dso__kernel_module_get_build_id(struct dso *self,
1549 const char *root_dir)
1551 char filename[PATH_MAX];
1553 * kernel module short names are of the form "[module]" and
1554 * we need just "module" here.
1556 const char *name = self->short_name + 1;
1558 snprintf(filename, sizeof(filename),
1559 "%s/sys/module/%.*s/notes/.note.gnu.build-id",
1560 root_dir, (int)strlen(name) - 1, name);
1562 if (sysfs__read_build_id(filename, self->build_id,
1563 sizeof(self->build_id)) == 0)
1564 self->has_build_id = true;
1569 static int map_groups__set_modules_path_dir(struct map_groups *self,
1570 const char *dir_name)
1572 struct dirent *dent;
1573 DIR *dir = opendir(dir_name);
1577 pr_debug("%s: cannot open %s dir\n", __func__, dir_name);
1581 while ((dent = readdir(dir)) != NULL) {
1582 char path[PATH_MAX];
1585 /*sshfs might return bad dent->d_type, so we have to stat*/
1586 sprintf(path, "%s/%s", dir_name, dent->d_name);
1587 if (stat(path, &st))
1590 if (S_ISDIR(st.st_mode)) {
1591 if (!strcmp(dent->d_name, ".") ||
1592 !strcmp(dent->d_name, ".."))
1595 snprintf(path, sizeof(path), "%s/%s",
1596 dir_name, dent->d_name);
1597 ret = map_groups__set_modules_path_dir(self, path);
1601 char *dot = strrchr(dent->d_name, '.'),
1606 if (dot == NULL || strcmp(dot, ".ko"))
1608 snprintf(dso_name, sizeof(dso_name), "[%.*s]",
1609 (int)(dot - dent->d_name), dent->d_name);
1611 strxfrchar(dso_name, '-', '_');
1612 map = map_groups__find_by_name(self, MAP__FUNCTION, dso_name);
1616 snprintf(path, sizeof(path), "%s/%s",
1617 dir_name, dent->d_name);
1619 long_name = strdup(path);
1620 if (long_name == NULL) {
1624 dso__set_long_name(map->dso, long_name);
1625 map->dso->lname_alloc = 1;
1626 dso__kernel_module_get_build_id(map->dso, "");
1635 static char *get_kernel_version(const char *root_dir)
1637 char version[PATH_MAX];
1640 const char *prefix = "Linux version ";
1642 sprintf(version, "%s/proc/version", root_dir);
1643 file = fopen(version, "r");
1648 tmp = fgets(version, sizeof(version), file);
1651 name = strstr(version, prefix);
1654 name += strlen(prefix);
1655 tmp = strchr(name, ' ');
1659 return strdup(name);
1662 static int machine__set_modules_path(struct machine *self)
1665 char modules_path[PATH_MAX];
1667 version = get_kernel_version(self->root_dir);
1671 snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s/kernel",
1672 self->root_dir, version);
1675 return map_groups__set_modules_path_dir(&self->kmaps, modules_path);
1679 * Constructor variant for modules (where we know from /proc/modules where
1680 * they are loaded) and for vmlinux, where only after we load all the
1681 * symbols we'll know where it starts and ends.
1683 static struct map *map__new2(u64 start, struct dso *dso, enum map_type type)
1685 struct map *self = calloc(1, (sizeof(*self) +
1686 (dso->kernel ? sizeof(struct kmap) : 0)));
1689 * ->end will be filled after we load all the symbols
1691 map__init(self, type, start, 0, 0, dso);
1697 struct map *machine__new_module(struct machine *self, u64 start,
1698 const char *filename)
1701 struct dso *dso = __dsos__findnew(&self->kernel_dsos, filename);
1706 map = map__new2(start, dso, MAP__FUNCTION);
1710 if (machine__is_host(self))
1711 dso->origin = DSO__ORIG_KMODULE;
1713 dso->origin = DSO__ORIG_GUEST_KMODULE;
1714 map_groups__insert(&self->kmaps, map);
1718 static int machine__create_modules(struct machine *self)
1724 const char *modules;
1725 char path[PATH_MAX];
1727 if (machine__is_default_guest(self))
1728 modules = symbol_conf.default_guest_modules;
1730 sprintf(path, "%s/proc/modules", self->root_dir);
1734 file = fopen(modules, "r");
1738 while (!feof(file)) {
1739 char name[PATH_MAX];
1744 line_len = getline(&line, &n, file);
1751 line[--line_len] = '\0'; /* \n */
1753 sep = strrchr(line, 'x');
1757 hex2u64(sep + 1, &start);
1759 sep = strchr(line, ' ');
1765 snprintf(name, sizeof(name), "[%s]", line);
1766 map = machine__new_module(self, start, name);
1768 goto out_delete_line;
1769 dso__kernel_module_get_build_id(map->dso, self->root_dir);
1775 return machine__set_modules_path(self);
1783 static int dso__load_vmlinux(struct dso *self, struct map *map,
1784 const char *vmlinux, symbol_filter_t filter)
1788 fd = open(vmlinux, O_RDONLY);
1792 dso__set_loaded(self, map->type);
1793 err = dso__load_sym(self, map, vmlinux, fd, filter, 0, 0);
1797 pr_debug("Using %s for symbols\n", vmlinux);
1802 int dso__load_vmlinux_path(struct dso *self, struct map *map,
1803 symbol_filter_t filter)
1808 pr_debug("Looking at the vmlinux_path (%d entries long)\n",
1809 vmlinux_path__nr_entries + 1);
1811 filename = dso__build_id_filename(self, NULL, 0);
1812 if (filename != NULL) {
1813 err = dso__load_vmlinux(self, map, filename, filter);
1815 dso__set_long_name(self, filename);
1821 for (i = 0; i < vmlinux_path__nr_entries; ++i) {
1822 err = dso__load_vmlinux(self, map, vmlinux_path[i], filter);
1824 dso__set_long_name(self, strdup(vmlinux_path[i]));
1832 static int dso__load_kernel_sym(struct dso *self, struct map *map,
1833 symbol_filter_t filter)
1836 const char *kallsyms_filename = NULL;
1837 char *kallsyms_allocated_filename = NULL;
1839 * Step 1: if the user specified a vmlinux filename, use it and only
1840 * it, reporting errors to the user if it cannot be used.
1842 * For instance, try to analyse an ARM perf.data file _without_ a
1843 * build-id, or if the user specifies the wrong path to the right
1844 * vmlinux file, obviously we can't fallback to another vmlinux (a
1845 * x86_86 one, on the machine where analysis is being performed, say),
1846 * or worse, /proc/kallsyms.
1848 * If the specified file _has_ a build-id and there is a build-id
1849 * section in the perf.data file, we will still do the expected
1850 * validation in dso__load_vmlinux and will bail out if they don't
1853 if (symbol_conf.vmlinux_name != NULL) {
1854 err = dso__load_vmlinux(self, map,
1855 symbol_conf.vmlinux_name, filter);
1857 dso__set_long_name(self,
1858 strdup(symbol_conf.vmlinux_name));
1864 if (vmlinux_path != NULL) {
1865 err = dso__load_vmlinux_path(self, map, filter);
1871 * Say the kernel DSO was created when processing the build-id header table,
1872 * we have a build-id, so check if it is the same as the running kernel,
1873 * using it if it is.
1875 if (self->has_build_id) {
1876 u8 kallsyms_build_id[BUILD_ID_SIZE];
1877 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
1879 if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id,
1880 sizeof(kallsyms_build_id)) == 0) {
1881 if (dso__build_id_equal(self, kallsyms_build_id)) {
1882 kallsyms_filename = "/proc/kallsyms";
1887 * Now look if we have it on the build-id cache in
1888 * $HOME/.debug/[kernel.kallsyms].
1890 build_id__sprintf(self->build_id, sizeof(self->build_id),
1893 if (asprintf(&kallsyms_allocated_filename,
1894 "%s/.debug/[kernel.kallsyms]/%s",
1895 getenv("HOME"), sbuild_id) == -1) {
1896 pr_err("Not enough memory for kallsyms file lookup\n");
1900 kallsyms_filename = kallsyms_allocated_filename;
1902 if (access(kallsyms_filename, F_OK)) {
1903 pr_err("No kallsyms or vmlinux with build-id %s "
1904 "was found\n", sbuild_id);
1905 free(kallsyms_allocated_filename);
1910 * Last resort, if we don't have a build-id and couldn't find
1911 * any vmlinux file, try the running kernel kallsyms table.
1913 kallsyms_filename = "/proc/kallsyms";
1917 err = dso__load_kallsyms(self, kallsyms_filename, map, filter);
1919 pr_debug("Using %s for symbols\n", kallsyms_filename);
1920 free(kallsyms_allocated_filename);
1924 if (kallsyms_filename != NULL)
1925 dso__set_long_name(self, strdup("[kernel.kallsyms]"));
1926 map__fixup_start(map);
1927 map__fixup_end(map);
1933 static int dso__load_guest_kernel_sym(struct dso *self, struct map *map,
1934 symbol_filter_t filter)
1937 const char *kallsyms_filename = NULL;
1938 struct machine *machine;
1939 char path[PATH_MAX];
1942 pr_debug("Guest kernel map hasn't the point to groups\n");
1945 machine = map->groups->machine;
1947 if (machine__is_default_guest(machine)) {
1949 * if the user specified a vmlinux filename, use it and only
1950 * it, reporting errors to the user if it cannot be used.
1951 * Or use file guest_kallsyms inputted by user on commandline
1953 if (symbol_conf.default_guest_vmlinux_name != NULL) {
1954 err = dso__load_vmlinux(self, map,
1955 symbol_conf.default_guest_vmlinux_name, filter);
1959 kallsyms_filename = symbol_conf.default_guest_kallsyms;
1960 if (!kallsyms_filename)
1963 sprintf(path, "%s/proc/kallsyms", machine->root_dir);
1964 kallsyms_filename = path;
1967 err = dso__load_kallsyms(self, kallsyms_filename, map, filter);
1969 pr_debug("Using %s for symbols\n", kallsyms_filename);
1973 if (kallsyms_filename != NULL) {
1974 machine__mmap_name(machine, path, sizeof(path));
1975 dso__set_long_name(self, strdup(path));
1977 map__fixup_start(map);
1978 map__fixup_end(map);
1984 static void dsos__add(struct list_head *head, struct dso *dso)
1986 list_add_tail(&dso->node, head);
1989 static struct dso *dsos__find(struct list_head *head, const char *name)
1993 list_for_each_entry(pos, head, node)
1994 if (strcmp(pos->long_name, name) == 0)
1999 struct dso *__dsos__findnew(struct list_head *head, const char *name)
2001 struct dso *dso = dsos__find(head, name);
2004 dso = dso__new(name);
2006 dsos__add(head, dso);
2007 dso__set_basename(dso);
2014 size_t __dsos__fprintf(struct list_head *head, FILE *fp)
2019 list_for_each_entry(pos, head, node) {
2021 for (i = 0; i < MAP__NR_TYPES; ++i)
2022 ret += dso__fprintf(pos, i, fp);
2028 size_t machines__fprintf_dsos(struct rb_root *self, FILE *fp)
2033 for (nd = rb_first(self); nd; nd = rb_next(nd)) {
2034 struct machine *pos = rb_entry(nd, struct machine, rb_node);
2035 ret += __dsos__fprintf(&pos->kernel_dsos, fp);
2036 ret += __dsos__fprintf(&pos->user_dsos, fp);
2042 static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp,
2048 list_for_each_entry(pos, head, node) {
2049 if (with_hits && !pos->hit)
2051 ret += dso__fprintf_buildid(pos, fp);
2052 ret += fprintf(fp, " %s\n", pos->long_name);
2057 size_t machine__fprintf_dsos_buildid(struct machine *self, FILE *fp, bool with_hits)
2059 return __dsos__fprintf_buildid(&self->kernel_dsos, fp, with_hits) +
2060 __dsos__fprintf_buildid(&self->user_dsos, fp, with_hits);
2063 size_t machines__fprintf_dsos_buildid(struct rb_root *self, FILE *fp, bool with_hits)
2068 for (nd = rb_first(self); nd; nd = rb_next(nd)) {
2069 struct machine *pos = rb_entry(nd, struct machine, rb_node);
2070 ret += machine__fprintf_dsos_buildid(pos, fp, with_hits);
2075 struct dso *dso__new_kernel(const char *name)
2077 struct dso *self = dso__new(name ?: "[kernel.kallsyms]");
2080 dso__set_short_name(self, "[kernel]");
2081 self->kernel = DSO_TYPE_KERNEL;
2087 static struct dso *dso__new_guest_kernel(struct machine *machine,
2091 struct dso *self = dso__new(name ?: machine__mmap_name(machine, bf, sizeof(bf)));
2094 dso__set_short_name(self, "[guest.kernel]");
2095 self->kernel = DSO_TYPE_GUEST_KERNEL;
2101 void dso__read_running_kernel_build_id(struct dso *self, struct machine *machine)
2103 char path[PATH_MAX];
2105 if (machine__is_default_guest(machine))
2107 sprintf(path, "%s/sys/kernel/notes", machine->root_dir);
2108 if (sysfs__read_build_id(path, self->build_id,
2109 sizeof(self->build_id)) == 0)
2110 self->has_build_id = true;
2113 static struct dso *machine__create_kernel(struct machine *self)
2115 const char *vmlinux_name = NULL;
2118 if (machine__is_host(self)) {
2119 vmlinux_name = symbol_conf.vmlinux_name;
2120 kernel = dso__new_kernel(vmlinux_name);
2122 if (machine__is_default_guest(self))
2123 vmlinux_name = symbol_conf.default_guest_vmlinux_name;
2124 kernel = dso__new_guest_kernel(self, vmlinux_name);
2127 if (kernel != NULL) {
2128 dso__read_running_kernel_build_id(kernel, self);
2129 dsos__add(&self->kernel_dsos, kernel);
2134 struct process_args {
2138 static int symbol__in_kernel(void *arg, const char *name,
2139 char type __used, u64 start)
2141 struct process_args *args = arg;
2143 if (strchr(name, '['))
2146 args->start = start;
2150 /* Figure out the start address of kernel map from /proc/kallsyms */
2151 static u64 machine__get_kernel_start_addr(struct machine *machine)
2153 const char *filename;
2154 char path[PATH_MAX];
2155 struct process_args args;
2157 if (machine__is_host(machine)) {
2158 filename = "/proc/kallsyms";
2160 if (machine__is_default_guest(machine))
2161 filename = (char *)symbol_conf.default_guest_kallsyms;
2163 sprintf(path, "%s/proc/kallsyms", machine->root_dir);
2168 if (kallsyms__parse(filename, &args, symbol__in_kernel) <= 0)
2174 int __machine__create_kernel_maps(struct machine *self, struct dso *kernel)
2177 u64 start = machine__get_kernel_start_addr(self);
2179 for (type = 0; type < MAP__NR_TYPES; ++type) {
2182 self->vmlinux_maps[type] = map__new2(start, kernel, type);
2183 if (self->vmlinux_maps[type] == NULL)
2186 self->vmlinux_maps[type]->map_ip =
2187 self->vmlinux_maps[type]->unmap_ip = identity__map_ip;
2189 kmap = map__kmap(self->vmlinux_maps[type]);
2190 kmap->kmaps = &self->kmaps;
2191 map_groups__insert(&self->kmaps, self->vmlinux_maps[type]);
2197 void machine__destroy_kernel_maps(struct machine *self)
2201 for (type = 0; type < MAP__NR_TYPES; ++type) {
2204 if (self->vmlinux_maps[type] == NULL)
2207 kmap = map__kmap(self->vmlinux_maps[type]);
2208 map_groups__remove(&self->kmaps, self->vmlinux_maps[type]);
2209 if (kmap->ref_reloc_sym) {
2211 * ref_reloc_sym is shared among all maps, so free just
2214 if (type == MAP__FUNCTION) {
2215 free((char *)kmap->ref_reloc_sym->name);
2216 kmap->ref_reloc_sym->name = NULL;
2217 free(kmap->ref_reloc_sym);
2219 kmap->ref_reloc_sym = NULL;
2222 map__delete(self->vmlinux_maps[type]);
2223 self->vmlinux_maps[type] = NULL;
2227 int machine__create_kernel_maps(struct machine *self)
2229 struct dso *kernel = machine__create_kernel(self);
2231 if (kernel == NULL ||
2232 __machine__create_kernel_maps(self, kernel) < 0)
2235 if (symbol_conf.use_modules && machine__create_modules(self) < 0)
2236 pr_debug("Problems creating module maps, continuing anyway...\n");
2238 * Now that we have all the maps created, just set the ->end of them:
2240 map_groups__fixup_end(&self->kmaps);
2244 static void vmlinux_path__exit(void)
2246 while (--vmlinux_path__nr_entries >= 0) {
2247 free(vmlinux_path[vmlinux_path__nr_entries]);
2248 vmlinux_path[vmlinux_path__nr_entries] = NULL;
2252 vmlinux_path = NULL;
2255 static int vmlinux_path__init(void)
2260 if (uname(&uts) < 0)
2263 vmlinux_path = malloc(sizeof(char *) * 5);
2264 if (vmlinux_path == NULL)
2267 vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux");
2268 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2270 ++vmlinux_path__nr_entries;
2271 vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux");
2272 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2274 ++vmlinux_path__nr_entries;
2275 snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", uts.release);
2276 vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
2277 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2279 ++vmlinux_path__nr_entries;
2280 snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", uts.release);
2281 vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
2282 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2284 ++vmlinux_path__nr_entries;
2285 snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux",
2287 vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
2288 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2290 ++vmlinux_path__nr_entries;
2295 vmlinux_path__exit();
2299 size_t machine__fprintf_vmlinux_path(struct machine *self, FILE *fp)
2303 struct dso *kdso = self->vmlinux_maps[MAP__FUNCTION]->dso;
2305 if (kdso->has_build_id) {
2306 char filename[PATH_MAX];
2307 if (dso__build_id_filename(kdso, filename, sizeof(filename)))
2308 printed += fprintf(fp, "[0] %s\n", filename);
2311 for (i = 0; i < vmlinux_path__nr_entries; ++i)
2312 printed += fprintf(fp, "[%d] %s\n",
2313 i + kdso->has_build_id, vmlinux_path[i]);
2318 static int setup_list(struct strlist **list, const char *list_str,
2319 const char *list_name)
2321 if (list_str == NULL)
2324 *list = strlist__new(true, list_str);
2326 pr_err("problems parsing %s list\n", list_name);
2332 int symbol__init(void)
2334 if (symbol_conf.initialized)
2337 elf_version(EV_CURRENT);
2338 if (symbol_conf.sort_by_name)
2339 symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) -
2340 sizeof(struct symbol));
2342 if (symbol_conf.try_vmlinux_path && vmlinux_path__init() < 0)
2345 if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') {
2346 pr_err("'.' is the only non valid --field-separator argument\n");
2350 if (setup_list(&symbol_conf.dso_list,
2351 symbol_conf.dso_list_str, "dso") < 0)
2354 if (setup_list(&symbol_conf.comm_list,
2355 symbol_conf.comm_list_str, "comm") < 0)
2356 goto out_free_dso_list;
2358 if (setup_list(&symbol_conf.sym_list,
2359 symbol_conf.sym_list_str, "symbol") < 0)
2360 goto out_free_comm_list;
2362 symbol_conf.initialized = true;
2366 strlist__delete(symbol_conf.dso_list);
2368 strlist__delete(symbol_conf.comm_list);
2372 void symbol__exit(void)
2374 if (!symbol_conf.initialized)
2376 strlist__delete(symbol_conf.sym_list);
2377 strlist__delete(symbol_conf.dso_list);
2378 strlist__delete(symbol_conf.comm_list);
2379 vmlinux_path__exit();
2380 symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL;
2381 symbol_conf.initialized = false;
2384 int machines__create_kernel_maps(struct rb_root *self, pid_t pid)
2386 struct machine *machine = machines__findnew(self, pid);
2388 if (machine == NULL)
2391 return machine__create_kernel_maps(machine);
2394 static int hex(char ch)
2396 if ((ch >= '0') && (ch <= '9'))
2398 if ((ch >= 'a') && (ch <= 'f'))
2399 return ch - 'a' + 10;
2400 if ((ch >= 'A') && (ch <= 'F'))
2401 return ch - 'A' + 10;
2406 * While we find nice hex chars, build a long_val.
2407 * Return number of chars processed.
2409 int hex2u64(const char *ptr, u64 *long_val)
2411 const char *p = ptr;
2415 const int hex_val = hex(*p);
2420 *long_val = (*long_val << 4) | hex_val;
2427 char *strxfrchar(char *s, char from, char to)
2431 while ((p = strchr(p, from)) != NULL)
2437 int machines__create_guest_kernel_maps(struct rb_root *self)
2440 struct dirent **namelist = NULL;
2442 char path[PATH_MAX];
2445 if (symbol_conf.default_guest_vmlinux_name ||
2446 symbol_conf.default_guest_modules ||
2447 symbol_conf.default_guest_kallsyms) {
2448 machines__create_kernel_maps(self, DEFAULT_GUEST_KERNEL_ID);
2451 if (symbol_conf.guestmount) {
2452 items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL);
2455 for (i = 0; i < items; i++) {
2456 if (!isdigit(namelist[i]->d_name[0])) {
2457 /* Filter out . and .. */
2460 pid = atoi(namelist[i]->d_name);
2461 sprintf(path, "%s/%s/proc/kallsyms",
2462 symbol_conf.guestmount,
2463 namelist[i]->d_name);
2464 ret = access(path, R_OK);
2466 pr_debug("Can't access file %s\n", path);
2469 machines__create_kernel_maps(self, pid);
2478 void machines__destroy_guest_kernel_maps(struct rb_root *self)
2480 struct rb_node *next = rb_first(self);
2483 struct machine *pos = rb_entry(next, struct machine, rb_node);
2485 next = rb_next(&pos->rb_node);
2486 rb_erase(&pos->rb_node, self);
2487 machine__delete(pos);
2491 int machine__load_kallsyms(struct machine *self, const char *filename,
2492 enum map_type type, symbol_filter_t filter)
2494 struct map *map = self->vmlinux_maps[type];
2495 int ret = dso__load_kallsyms(map->dso, filename, map, filter);
2498 dso__set_loaded(map->dso, type);
2500 * Since /proc/kallsyms will have multiple sessions for the
2501 * kernel, with modules between them, fixup the end of all
2504 __map_groups__fixup_end(&self->kmaps, type);
2510 int machine__load_vmlinux_path(struct machine *self, enum map_type type,
2511 symbol_filter_t filter)
2513 struct map *map = self->vmlinux_maps[type];
2514 int ret = dso__load_vmlinux_path(map->dso, map, filter);
2517 dso__set_loaded(map->dso, type);
2518 map__reloc_vmlinux(map);