15aab621bSArnaldo Carvalho de Melo #include <dirent.h> 25aab621bSArnaldo Carvalho de Melo #include <errno.h> 35aab621bSArnaldo Carvalho de Melo #include <stdlib.h> 45aab621bSArnaldo Carvalho de Melo #include <stdio.h> 55aab621bSArnaldo Carvalho de Melo #include <string.h> 65aab621bSArnaldo Carvalho de Melo #include <sys/types.h> 75aab621bSArnaldo Carvalho de Melo #include <sys/stat.h> 85aab621bSArnaldo Carvalho de Melo #include <sys/param.h> 95aab621bSArnaldo Carvalho de Melo #include <fcntl.h> 105aab621bSArnaldo Carvalho de Melo #include <unistd.h> 119486aa38SArnaldo Carvalho de Melo #include <inttypes.h> 12b36f19d5SArnaldo Carvalho de Melo #include "build-id.h" 13e334c726SNamhyung Kim #include "util.h" 148a6c5b26SArnaldo Carvalho de Melo #include "debug.h" 1569d2591aSArnaldo Carvalho de Melo #include "machine.h" 1686470930SIngo Molnar #include "symbol.h" 175aab621bSArnaldo Carvalho de Melo #include "strlist.h" 1886470930SIngo Molnar 1986470930SIngo Molnar #include <elf.h> 20f1617b40SArnaldo Carvalho de Melo #include <limits.h> 21439d473bSArnaldo Carvalho de Melo #include <sys/utsname.h> 222cdbc46dSPeter Zijlstra 233b01a413SArnaldo Carvalho de Melo #ifndef KSYM_NAME_LEN 24c752d040SRicardo Ribalda Delgado #define KSYM_NAME_LEN 256 253b01a413SArnaldo Carvalho de Melo #endif 263b01a413SArnaldo Carvalho de Melo 27aeafcbafSArnaldo Carvalho de Melo static int dso__load_kernel_sym(struct dso *dso, struct map *map, 289de89fe7SArnaldo Carvalho de Melo symbol_filter_t filter); 29aeafcbafSArnaldo Carvalho de Melo static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map, 30a1645ce1SZhang, Yanmin symbol_filter_t filter); 313f067dcaSArnaldo Carvalho de Melo int vmlinux_path__nr_entries; 323f067dcaSArnaldo Carvalho de Melo char **vmlinux_path; 33439d473bSArnaldo Carvalho de Melo 3475be6cf4SArnaldo Carvalho de Melo struct symbol_conf symbol_conf = { 35b32d133aSArnaldo Carvalho de Melo .use_modules = true, 36b32d133aSArnaldo Carvalho de Melo .try_vmlinux_path = true, 373e6a2a7fSStephane Eranian .annotate_src = true, 38328ccdacSNamhyung Kim .demangle = true, 39ec5761eaSDavid Ahern .symfs = "", 40b32d133aSArnaldo Carvalho de Melo }; 41b32d133aSArnaldo Carvalho de Melo 4244f24cb3SJiri Olsa static enum dso_binary_type binary_type_symtab[] = { 4344f24cb3SJiri Olsa DSO_BINARY_TYPE__KALLSYMS, 4444f24cb3SJiri Olsa DSO_BINARY_TYPE__GUEST_KALLSYMS, 4544f24cb3SJiri Olsa DSO_BINARY_TYPE__JAVA_JIT, 4644f24cb3SJiri Olsa DSO_BINARY_TYPE__DEBUGLINK, 4744f24cb3SJiri Olsa DSO_BINARY_TYPE__BUILD_ID_CACHE, 4844f24cb3SJiri Olsa DSO_BINARY_TYPE__FEDORA_DEBUGINFO, 4944f24cb3SJiri Olsa DSO_BINARY_TYPE__UBUNTU_DEBUGINFO, 5044f24cb3SJiri Olsa DSO_BINARY_TYPE__BUILDID_DEBUGINFO, 5144f24cb3SJiri Olsa DSO_BINARY_TYPE__SYSTEM_PATH_DSO, 5244f24cb3SJiri Olsa DSO_BINARY_TYPE__GUEST_KMODULE, 5344f24cb3SJiri Olsa DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE, 5444f24cb3SJiri Olsa DSO_BINARY_TYPE__NOT_FOUND, 5544f24cb3SJiri Olsa }; 5644f24cb3SJiri Olsa 57028df767SJiri Olsa #define DSO_BINARY_TYPE__SYMTAB_CNT ARRAY_SIZE(binary_type_symtab) 5844f24cb3SJiri Olsa 5936a3e646SArnaldo Carvalho de Melo bool symbol_type__is_a(char symbol_type, enum map_type map_type) 606893d4eeSArnaldo Carvalho de Melo { 6131877908SAnton Blanchard symbol_type = toupper(symbol_type); 6231877908SAnton Blanchard 636893d4eeSArnaldo Carvalho de Melo switch (map_type) { 646893d4eeSArnaldo Carvalho de Melo case MAP__FUNCTION: 656893d4eeSArnaldo Carvalho de Melo return symbol_type == 'T' || symbol_type == 'W'; 66f1dfa0b1SArnaldo Carvalho de Melo case MAP__VARIABLE: 6731877908SAnton Blanchard return symbol_type == 'D'; 686893d4eeSArnaldo Carvalho de Melo default: 696893d4eeSArnaldo Carvalho de Melo return false; 706893d4eeSArnaldo Carvalho de Melo } 716893d4eeSArnaldo Carvalho de Melo } 726893d4eeSArnaldo Carvalho de Melo 73694bf407SAnton Blanchard static int prefix_underscores_count(const char *str) 74694bf407SAnton Blanchard { 75694bf407SAnton Blanchard const char *tail = str; 76694bf407SAnton Blanchard 77694bf407SAnton Blanchard while (*tail == '_') 78694bf407SAnton Blanchard tail++; 79694bf407SAnton Blanchard 80694bf407SAnton Blanchard return tail - str; 81694bf407SAnton Blanchard } 82694bf407SAnton Blanchard 83694bf407SAnton Blanchard #define SYMBOL_A 0 84694bf407SAnton Blanchard #define SYMBOL_B 1 85694bf407SAnton Blanchard 86694bf407SAnton Blanchard static int choose_best_symbol(struct symbol *syma, struct symbol *symb) 87694bf407SAnton Blanchard { 88694bf407SAnton Blanchard s64 a; 89694bf407SAnton Blanchard s64 b; 90694bf407SAnton Blanchard 91694bf407SAnton Blanchard /* Prefer a symbol with non zero length */ 92694bf407SAnton Blanchard a = syma->end - syma->start; 93694bf407SAnton Blanchard b = symb->end - symb->start; 94694bf407SAnton Blanchard if ((b == 0) && (a > 0)) 95694bf407SAnton Blanchard return SYMBOL_A; 96694bf407SAnton Blanchard else if ((a == 0) && (b > 0)) 97694bf407SAnton Blanchard return SYMBOL_B; 98694bf407SAnton Blanchard 99694bf407SAnton Blanchard /* Prefer a non weak symbol over a weak one */ 100694bf407SAnton Blanchard a = syma->binding == STB_WEAK; 101694bf407SAnton Blanchard b = symb->binding == STB_WEAK; 102694bf407SAnton Blanchard if (b && !a) 103694bf407SAnton Blanchard return SYMBOL_A; 104694bf407SAnton Blanchard if (a && !b) 105694bf407SAnton Blanchard return SYMBOL_B; 106694bf407SAnton Blanchard 107694bf407SAnton Blanchard /* Prefer a global symbol over a non global one */ 108694bf407SAnton Blanchard a = syma->binding == STB_GLOBAL; 109694bf407SAnton Blanchard b = symb->binding == STB_GLOBAL; 110694bf407SAnton Blanchard if (a && !b) 111694bf407SAnton Blanchard return SYMBOL_A; 112694bf407SAnton Blanchard if (b && !a) 113694bf407SAnton Blanchard return SYMBOL_B; 114694bf407SAnton Blanchard 115694bf407SAnton Blanchard /* Prefer a symbol with less underscores */ 116694bf407SAnton Blanchard a = prefix_underscores_count(syma->name); 117694bf407SAnton Blanchard b = prefix_underscores_count(symb->name); 118694bf407SAnton Blanchard if (b > a) 119694bf407SAnton Blanchard return SYMBOL_A; 120694bf407SAnton Blanchard else if (a > b) 121694bf407SAnton Blanchard return SYMBOL_B; 122694bf407SAnton Blanchard 123694bf407SAnton Blanchard /* If all else fails, choose the symbol with the longest name */ 124694bf407SAnton Blanchard if (strlen(syma->name) >= strlen(symb->name)) 125694bf407SAnton Blanchard return SYMBOL_A; 126694bf407SAnton Blanchard else 127694bf407SAnton Blanchard return SYMBOL_B; 128694bf407SAnton Blanchard } 129694bf407SAnton Blanchard 130e5a1845fSNamhyung Kim void symbols__fixup_duplicate(struct rb_root *symbols) 131694bf407SAnton Blanchard { 132694bf407SAnton Blanchard struct rb_node *nd; 133694bf407SAnton Blanchard struct symbol *curr, *next; 134694bf407SAnton Blanchard 135694bf407SAnton Blanchard nd = rb_first(symbols); 136694bf407SAnton Blanchard 137694bf407SAnton Blanchard while (nd) { 138694bf407SAnton Blanchard curr = rb_entry(nd, struct symbol, rb_node); 139694bf407SAnton Blanchard again: 140694bf407SAnton Blanchard nd = rb_next(&curr->rb_node); 141694bf407SAnton Blanchard next = rb_entry(nd, struct symbol, rb_node); 142694bf407SAnton Blanchard 143694bf407SAnton Blanchard if (!nd) 144694bf407SAnton Blanchard break; 145694bf407SAnton Blanchard 146694bf407SAnton Blanchard if (curr->start != next->start) 147694bf407SAnton Blanchard continue; 148694bf407SAnton Blanchard 149694bf407SAnton Blanchard if (choose_best_symbol(curr, next) == SYMBOL_A) { 150694bf407SAnton Blanchard rb_erase(&next->rb_node, symbols); 151694bf407SAnton Blanchard goto again; 152694bf407SAnton Blanchard } else { 153694bf407SAnton Blanchard nd = rb_next(&curr->rb_node); 154694bf407SAnton Blanchard rb_erase(&curr->rb_node, symbols); 155694bf407SAnton Blanchard } 156694bf407SAnton Blanchard } 157694bf407SAnton Blanchard } 158694bf407SAnton Blanchard 159e5a1845fSNamhyung Kim void symbols__fixup_end(struct rb_root *symbols) 160af427bf5SArnaldo Carvalho de Melo { 161aeafcbafSArnaldo Carvalho de Melo struct rb_node *nd, *prevnd = rb_first(symbols); 1622e538c4aSArnaldo Carvalho de Melo struct symbol *curr, *prev; 163af427bf5SArnaldo Carvalho de Melo 164af427bf5SArnaldo Carvalho de Melo if (prevnd == NULL) 165af427bf5SArnaldo Carvalho de Melo return; 166af427bf5SArnaldo Carvalho de Melo 1672e538c4aSArnaldo Carvalho de Melo curr = rb_entry(prevnd, struct symbol, rb_node); 1682e538c4aSArnaldo Carvalho de Melo 169af427bf5SArnaldo Carvalho de Melo for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { 1702e538c4aSArnaldo Carvalho de Melo prev = curr; 1712e538c4aSArnaldo Carvalho de Melo curr = rb_entry(nd, struct symbol, rb_node); 172af427bf5SArnaldo Carvalho de Melo 1733b01a413SArnaldo Carvalho de Melo if (prev->end == prev->start && prev->end != curr->start) 174af427bf5SArnaldo Carvalho de Melo prev->end = curr->start - 1; 175af427bf5SArnaldo Carvalho de Melo } 176af427bf5SArnaldo Carvalho de Melo 1772e538c4aSArnaldo Carvalho de Melo /* Last entry */ 1782e538c4aSArnaldo Carvalho de Melo if (curr->end == curr->start) 1792e538c4aSArnaldo Carvalho de Melo curr->end = roundup(curr->start, 4096); 1802e538c4aSArnaldo Carvalho de Melo } 1812e538c4aSArnaldo Carvalho de Melo 182e5a1845fSNamhyung Kim void __map_groups__fixup_end(struct map_groups *mg, enum map_type type) 183af427bf5SArnaldo Carvalho de Melo { 184af427bf5SArnaldo Carvalho de Melo struct map *prev, *curr; 185aeafcbafSArnaldo Carvalho de Melo struct rb_node *nd, *prevnd = rb_first(&mg->maps[type]); 186af427bf5SArnaldo Carvalho de Melo 187af427bf5SArnaldo Carvalho de Melo if (prevnd == NULL) 188af427bf5SArnaldo Carvalho de Melo return; 189af427bf5SArnaldo Carvalho de Melo 190af427bf5SArnaldo Carvalho de Melo curr = rb_entry(prevnd, struct map, rb_node); 191af427bf5SArnaldo Carvalho de Melo 192af427bf5SArnaldo Carvalho de Melo for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { 193af427bf5SArnaldo Carvalho de Melo prev = curr; 194af427bf5SArnaldo Carvalho de Melo curr = rb_entry(nd, struct map, rb_node); 195af427bf5SArnaldo Carvalho de Melo prev->end = curr->start - 1; 1962e538c4aSArnaldo Carvalho de Melo } 19790c83218SArnaldo Carvalho de Melo 19890c83218SArnaldo Carvalho de Melo /* 19990c83218SArnaldo Carvalho de Melo * We still haven't the actual symbols, so guess the 20090c83218SArnaldo Carvalho de Melo * last map final address. 20190c83218SArnaldo Carvalho de Melo */ 2029d1faba5SIan Munsie curr->end = ~0ULL; 203af427bf5SArnaldo Carvalho de Melo } 204af427bf5SArnaldo Carvalho de Melo 205e5a1845fSNamhyung Kim struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name) 20686470930SIngo Molnar { 20786470930SIngo Molnar size_t namelen = strlen(name) + 1; 208aeafcbafSArnaldo Carvalho de Melo struct symbol *sym = calloc(1, (symbol_conf.priv_size + 209aeafcbafSArnaldo Carvalho de Melo sizeof(*sym) + namelen)); 210aeafcbafSArnaldo Carvalho de Melo if (sym == NULL) 21186470930SIngo Molnar return NULL; 21286470930SIngo Molnar 21375be6cf4SArnaldo Carvalho de Melo if (symbol_conf.priv_size) 214aeafcbafSArnaldo Carvalho de Melo sym = ((void *)sym) + symbol_conf.priv_size; 21536479484SArnaldo Carvalho de Melo 216aeafcbafSArnaldo Carvalho de Melo sym->start = start; 217aeafcbafSArnaldo Carvalho de Melo sym->end = len ? start + len - 1 : start; 218aeafcbafSArnaldo Carvalho de Melo sym->binding = binding; 219aeafcbafSArnaldo Carvalho de Melo sym->namelen = namelen - 1; 220e4204992SArnaldo Carvalho de Melo 221aeafcbafSArnaldo Carvalho de Melo pr_debug4("%s: %s %#" PRIx64 "-%#" PRIx64 "\n", 222aeafcbafSArnaldo Carvalho de Melo __func__, name, start, sym->end); 223aeafcbafSArnaldo Carvalho de Melo memcpy(sym->name, name, namelen); 224e4204992SArnaldo Carvalho de Melo 225aeafcbafSArnaldo Carvalho de Melo return sym; 22686470930SIngo Molnar } 22786470930SIngo Molnar 228aeafcbafSArnaldo Carvalho de Melo void symbol__delete(struct symbol *sym) 22986470930SIngo Molnar { 230aeafcbafSArnaldo Carvalho de Melo free(((void *)sym) - symbol_conf.priv_size); 23186470930SIngo Molnar } 23286470930SIngo Molnar 233cdd059d7SJiri Olsa size_t symbol__fprintf(struct symbol *sym, FILE *fp) 23486470930SIngo Molnar { 2359486aa38SArnaldo Carvalho de Melo return fprintf(fp, " %" PRIx64 "-%" PRIx64 " %c %s\n", 236aeafcbafSArnaldo Carvalho de Melo sym->start, sym->end, 237aeafcbafSArnaldo Carvalho de Melo sym->binding == STB_GLOBAL ? 'g' : 238aeafcbafSArnaldo Carvalho de Melo sym->binding == STB_LOCAL ? 'l' : 'w', 239aeafcbafSArnaldo Carvalho de Melo sym->name); 24086470930SIngo Molnar } 24186470930SIngo Molnar 242a978f2abSAkihiro Nagai size_t symbol__fprintf_symname_offs(const struct symbol *sym, 243a978f2abSAkihiro Nagai const struct addr_location *al, FILE *fp) 244a978f2abSAkihiro Nagai { 245a978f2abSAkihiro Nagai unsigned long offset; 246a978f2abSAkihiro Nagai size_t length; 247a978f2abSAkihiro Nagai 248a978f2abSAkihiro Nagai if (sym && sym->name) { 249a978f2abSAkihiro Nagai length = fprintf(fp, "%s", sym->name); 250a978f2abSAkihiro Nagai if (al) { 251a978f2abSAkihiro Nagai offset = al->addr - sym->start; 252a978f2abSAkihiro Nagai length += fprintf(fp, "+0x%lx", offset); 253a978f2abSAkihiro Nagai } 254a978f2abSAkihiro Nagai return length; 255a978f2abSAkihiro Nagai } else 256a978f2abSAkihiro Nagai return fprintf(fp, "[unknown]"); 257a978f2abSAkihiro Nagai } 258a978f2abSAkihiro Nagai 259547a92e0SAkihiro Nagai size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp) 260547a92e0SAkihiro Nagai { 261a978f2abSAkihiro Nagai return symbol__fprintf_symname_offs(sym, NULL, fp); 262547a92e0SAkihiro Nagai } 263547a92e0SAkihiro Nagai 264cdd059d7SJiri Olsa void symbols__delete(struct rb_root *symbols) 26586470930SIngo Molnar { 26686470930SIngo Molnar struct symbol *pos; 267aeafcbafSArnaldo Carvalho de Melo struct rb_node *next = rb_first(symbols); 26886470930SIngo Molnar 26986470930SIngo Molnar while (next) { 27086470930SIngo Molnar pos = rb_entry(next, struct symbol, rb_node); 27186470930SIngo Molnar next = rb_next(&pos->rb_node); 272aeafcbafSArnaldo Carvalho de Melo rb_erase(&pos->rb_node, symbols); 27300a192b3SArnaldo Carvalho de Melo symbol__delete(pos); 27486470930SIngo Molnar } 27586470930SIngo Molnar } 27686470930SIngo Molnar 277e5a1845fSNamhyung Kim void symbols__insert(struct rb_root *symbols, struct symbol *sym) 27886470930SIngo Molnar { 279aeafcbafSArnaldo Carvalho de Melo struct rb_node **p = &symbols->rb_node; 28086470930SIngo Molnar struct rb_node *parent = NULL; 2819cffa8d5SPaul Mackerras const u64 ip = sym->start; 28286470930SIngo Molnar struct symbol *s; 28386470930SIngo Molnar 28486470930SIngo Molnar while (*p != NULL) { 28586470930SIngo Molnar parent = *p; 28686470930SIngo Molnar s = rb_entry(parent, struct symbol, rb_node); 28786470930SIngo Molnar if (ip < s->start) 28886470930SIngo Molnar p = &(*p)->rb_left; 28986470930SIngo Molnar else 29086470930SIngo Molnar p = &(*p)->rb_right; 29186470930SIngo Molnar } 29286470930SIngo Molnar rb_link_node(&sym->rb_node, parent, p); 293aeafcbafSArnaldo Carvalho de Melo rb_insert_color(&sym->rb_node, symbols); 29486470930SIngo Molnar } 29586470930SIngo Molnar 296aeafcbafSArnaldo Carvalho de Melo static struct symbol *symbols__find(struct rb_root *symbols, u64 ip) 29786470930SIngo Molnar { 29886470930SIngo Molnar struct rb_node *n; 29986470930SIngo Molnar 300aeafcbafSArnaldo Carvalho de Melo if (symbols == NULL) 30186470930SIngo Molnar return NULL; 30286470930SIngo Molnar 303aeafcbafSArnaldo Carvalho de Melo n = symbols->rb_node; 30486470930SIngo Molnar 30586470930SIngo Molnar while (n) { 30686470930SIngo Molnar struct symbol *s = rb_entry(n, struct symbol, rb_node); 30786470930SIngo Molnar 30886470930SIngo Molnar if (ip < s->start) 30986470930SIngo Molnar n = n->rb_left; 31086470930SIngo Molnar else if (ip > s->end) 31186470930SIngo Molnar n = n->rb_right; 31286470930SIngo Molnar else 31386470930SIngo Molnar return s; 31486470930SIngo Molnar } 31586470930SIngo Molnar 31686470930SIngo Molnar return NULL; 31786470930SIngo Molnar } 31886470930SIngo Molnar 31979406cd7SArnaldo Carvalho de Melo struct symbol_name_rb_node { 32079406cd7SArnaldo Carvalho de Melo struct rb_node rb_node; 32179406cd7SArnaldo Carvalho de Melo struct symbol sym; 32279406cd7SArnaldo Carvalho de Melo }; 32379406cd7SArnaldo Carvalho de Melo 324aeafcbafSArnaldo Carvalho de Melo static void symbols__insert_by_name(struct rb_root *symbols, struct symbol *sym) 32579406cd7SArnaldo Carvalho de Melo { 326aeafcbafSArnaldo Carvalho de Melo struct rb_node **p = &symbols->rb_node; 32779406cd7SArnaldo Carvalho de Melo struct rb_node *parent = NULL; 32802a9d037SRabin Vincent struct symbol_name_rb_node *symn, *s; 32902a9d037SRabin Vincent 33002a9d037SRabin Vincent symn = container_of(sym, struct symbol_name_rb_node, sym); 33179406cd7SArnaldo Carvalho de Melo 33279406cd7SArnaldo Carvalho de Melo while (*p != NULL) { 33379406cd7SArnaldo Carvalho de Melo parent = *p; 33479406cd7SArnaldo Carvalho de Melo s = rb_entry(parent, struct symbol_name_rb_node, rb_node); 33579406cd7SArnaldo Carvalho de Melo if (strcmp(sym->name, s->sym.name) < 0) 33679406cd7SArnaldo Carvalho de Melo p = &(*p)->rb_left; 33779406cd7SArnaldo Carvalho de Melo else 33879406cd7SArnaldo Carvalho de Melo p = &(*p)->rb_right; 33979406cd7SArnaldo Carvalho de Melo } 34079406cd7SArnaldo Carvalho de Melo rb_link_node(&symn->rb_node, parent, p); 341aeafcbafSArnaldo Carvalho de Melo rb_insert_color(&symn->rb_node, symbols); 34279406cd7SArnaldo Carvalho de Melo } 34379406cd7SArnaldo Carvalho de Melo 344aeafcbafSArnaldo Carvalho de Melo static void symbols__sort_by_name(struct rb_root *symbols, 345aeafcbafSArnaldo Carvalho de Melo struct rb_root *source) 34679406cd7SArnaldo Carvalho de Melo { 34779406cd7SArnaldo Carvalho de Melo struct rb_node *nd; 34879406cd7SArnaldo Carvalho de Melo 34979406cd7SArnaldo Carvalho de Melo for (nd = rb_first(source); nd; nd = rb_next(nd)) { 35079406cd7SArnaldo Carvalho de Melo struct symbol *pos = rb_entry(nd, struct symbol, rb_node); 351aeafcbafSArnaldo Carvalho de Melo symbols__insert_by_name(symbols, pos); 35279406cd7SArnaldo Carvalho de Melo } 35379406cd7SArnaldo Carvalho de Melo } 35479406cd7SArnaldo Carvalho de Melo 355aeafcbafSArnaldo Carvalho de Melo static struct symbol *symbols__find_by_name(struct rb_root *symbols, 356aeafcbafSArnaldo Carvalho de Melo const char *name) 35779406cd7SArnaldo Carvalho de Melo { 35879406cd7SArnaldo Carvalho de Melo struct rb_node *n; 35979406cd7SArnaldo Carvalho de Melo 360aeafcbafSArnaldo Carvalho de Melo if (symbols == NULL) 36179406cd7SArnaldo Carvalho de Melo return NULL; 36279406cd7SArnaldo Carvalho de Melo 363aeafcbafSArnaldo Carvalho de Melo n = symbols->rb_node; 36479406cd7SArnaldo Carvalho de Melo 36579406cd7SArnaldo Carvalho de Melo while (n) { 36679406cd7SArnaldo Carvalho de Melo struct symbol_name_rb_node *s; 36779406cd7SArnaldo Carvalho de Melo int cmp; 36879406cd7SArnaldo Carvalho de Melo 36979406cd7SArnaldo Carvalho de Melo s = rb_entry(n, struct symbol_name_rb_node, rb_node); 37079406cd7SArnaldo Carvalho de Melo cmp = strcmp(name, s->sym.name); 37179406cd7SArnaldo Carvalho de Melo 37279406cd7SArnaldo Carvalho de Melo if (cmp < 0) 37379406cd7SArnaldo Carvalho de Melo n = n->rb_left; 37479406cd7SArnaldo Carvalho de Melo else if (cmp > 0) 37579406cd7SArnaldo Carvalho de Melo n = n->rb_right; 37679406cd7SArnaldo Carvalho de Melo else 37779406cd7SArnaldo Carvalho de Melo return &s->sym; 37879406cd7SArnaldo Carvalho de Melo } 37979406cd7SArnaldo Carvalho de Melo 38079406cd7SArnaldo Carvalho de Melo return NULL; 38179406cd7SArnaldo Carvalho de Melo } 38279406cd7SArnaldo Carvalho de Melo 383aeafcbafSArnaldo Carvalho de Melo struct symbol *dso__find_symbol(struct dso *dso, 38479406cd7SArnaldo Carvalho de Melo enum map_type type, u64 addr) 385fcf1203aSArnaldo Carvalho de Melo { 386aeafcbafSArnaldo Carvalho de Melo return symbols__find(&dso->symbols[type], addr); 387fcf1203aSArnaldo Carvalho de Melo } 388fcf1203aSArnaldo Carvalho de Melo 389aeafcbafSArnaldo Carvalho de Melo struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type, 39079406cd7SArnaldo Carvalho de Melo const char *name) 39179406cd7SArnaldo Carvalho de Melo { 392aeafcbafSArnaldo Carvalho de Melo return symbols__find_by_name(&dso->symbol_names[type], name); 39379406cd7SArnaldo Carvalho de Melo } 39479406cd7SArnaldo Carvalho de Melo 395aeafcbafSArnaldo Carvalho de Melo void dso__sort_by_name(struct dso *dso, enum map_type type) 39679406cd7SArnaldo Carvalho de Melo { 397aeafcbafSArnaldo Carvalho de Melo dso__set_sorted_by_name(dso, type); 398aeafcbafSArnaldo Carvalho de Melo return symbols__sort_by_name(&dso->symbol_names[type], 399aeafcbafSArnaldo Carvalho de Melo &dso->symbols[type]); 40079406cd7SArnaldo Carvalho de Melo } 40179406cd7SArnaldo Carvalho de Melo 402aeafcbafSArnaldo Carvalho de Melo size_t dso__fprintf_symbols_by_name(struct dso *dso, 403aeafcbafSArnaldo Carvalho de Melo enum map_type type, FILE *fp) 40490f18e63SSrikar Dronamraju { 40590f18e63SSrikar Dronamraju size_t ret = 0; 40690f18e63SSrikar Dronamraju struct rb_node *nd; 40790f18e63SSrikar Dronamraju struct symbol_name_rb_node *pos; 40890f18e63SSrikar Dronamraju 409aeafcbafSArnaldo Carvalho de Melo for (nd = rb_first(&dso->symbol_names[type]); nd; nd = rb_next(nd)) { 41090f18e63SSrikar Dronamraju pos = rb_entry(nd, struct symbol_name_rb_node, rb_node); 41190f18e63SSrikar Dronamraju fprintf(fp, "%s\n", pos->sym.name); 41290f18e63SSrikar Dronamraju } 41390f18e63SSrikar Dronamraju 41490f18e63SSrikar Dronamraju return ret; 41590f18e63SSrikar Dronamraju } 41690f18e63SSrikar Dronamraju 4179e201442SArnaldo Carvalho de Melo int kallsyms__parse(const char *filename, void *arg, 4189e201442SArnaldo Carvalho de Melo int (*process_symbol)(void *arg, const char *name, 41982151520SCody P Schafer char type, u64 start)) 42086470930SIngo Molnar { 42186470930SIngo Molnar char *line = NULL; 42286470930SIngo Molnar size_t n; 4233b01a413SArnaldo Carvalho de Melo int err = -1; 4249e201442SArnaldo Carvalho de Melo FILE *file = fopen(filename, "r"); 42586470930SIngo Molnar 42686470930SIngo Molnar if (file == NULL) 42786470930SIngo Molnar goto out_failure; 42886470930SIngo Molnar 4293b01a413SArnaldo Carvalho de Melo err = 0; 4303b01a413SArnaldo Carvalho de Melo 43186470930SIngo Molnar while (!feof(file)) { 4329cffa8d5SPaul Mackerras u64 start; 43386470930SIngo Molnar int line_len, len; 43486470930SIngo Molnar char symbol_type; 4352e538c4aSArnaldo Carvalho de Melo char *symbol_name; 43686470930SIngo Molnar 43786470930SIngo Molnar line_len = getline(&line, &n, file); 438a1645ce1SZhang, Yanmin if (line_len < 0 || !line) 43986470930SIngo Molnar break; 44086470930SIngo Molnar 44186470930SIngo Molnar line[--line_len] = '\0'; /* \n */ 44286470930SIngo Molnar 44386470930SIngo Molnar len = hex2u64(line, &start); 44486470930SIngo Molnar 44586470930SIngo Molnar len++; 44686470930SIngo Molnar if (len + 2 >= line_len) 44786470930SIngo Molnar continue; 44886470930SIngo Molnar 44931877908SAnton Blanchard symbol_type = line[len]; 4503b01a413SArnaldo Carvalho de Melo len += 2; 4513b01a413SArnaldo Carvalho de Melo symbol_name = line + len; 4523b01a413SArnaldo Carvalho de Melo len = line_len - len; 453682b335aSArnaldo Carvalho de Melo 4543b01a413SArnaldo Carvalho de Melo if (len >= KSYM_NAME_LEN) { 4553b01a413SArnaldo Carvalho de Melo err = -1; 4563b01a413SArnaldo Carvalho de Melo break; 4573b01a413SArnaldo Carvalho de Melo } 4583b01a413SArnaldo Carvalho de Melo 4593f5a4272SAnton Blanchard err = process_symbol(arg, symbol_name, 46082151520SCody P Schafer symbol_type, start); 461682b335aSArnaldo Carvalho de Melo if (err) 462682b335aSArnaldo Carvalho de Melo break; 463682b335aSArnaldo Carvalho de Melo } 464682b335aSArnaldo Carvalho de Melo 465682b335aSArnaldo Carvalho de Melo free(line); 466682b335aSArnaldo Carvalho de Melo fclose(file); 467682b335aSArnaldo Carvalho de Melo return err; 468682b335aSArnaldo Carvalho de Melo 469682b335aSArnaldo Carvalho de Melo out_failure: 470682b335aSArnaldo Carvalho de Melo return -1; 471682b335aSArnaldo Carvalho de Melo } 472682b335aSArnaldo Carvalho de Melo 473682b335aSArnaldo Carvalho de Melo struct process_kallsyms_args { 474682b335aSArnaldo Carvalho de Melo struct map *map; 475682b335aSArnaldo Carvalho de Melo struct dso *dso; 476682b335aSArnaldo Carvalho de Melo }; 477682b335aSArnaldo Carvalho de Melo 478c408fedfSArnaldo Carvalho de Melo static u8 kallsyms2elf_type(char type) 479c408fedfSArnaldo Carvalho de Melo { 480c408fedfSArnaldo Carvalho de Melo if (type == 'W') 481c408fedfSArnaldo Carvalho de Melo return STB_WEAK; 482c408fedfSArnaldo Carvalho de Melo 483c408fedfSArnaldo Carvalho de Melo return isupper(type) ? STB_GLOBAL : STB_LOCAL; 484c408fedfSArnaldo Carvalho de Melo } 485c408fedfSArnaldo Carvalho de Melo 486682b335aSArnaldo Carvalho de Melo static int map__process_kallsym_symbol(void *arg, const char *name, 48782151520SCody P Schafer char type, u64 start) 488682b335aSArnaldo Carvalho de Melo { 489682b335aSArnaldo Carvalho de Melo struct symbol *sym; 490682b335aSArnaldo Carvalho de Melo struct process_kallsyms_args *a = arg; 491682b335aSArnaldo Carvalho de Melo struct rb_root *root = &a->dso->symbols[a->map->type]; 492682b335aSArnaldo Carvalho de Melo 493682b335aSArnaldo Carvalho de Melo if (!symbol_type__is_a(type, a->map->type)) 494682b335aSArnaldo Carvalho de Melo return 0; 495682b335aSArnaldo Carvalho de Melo 49682151520SCody P Schafer /* 49782151520SCody P Schafer * module symbols are not sorted so we add all 49882151520SCody P Schafer * symbols, setting length to 0, and rely on 49982151520SCody P Schafer * symbols__fixup_end() to fix it up. 50082151520SCody P Schafer */ 50182151520SCody P Schafer sym = symbol__new(start, 0, kallsyms2elf_type(type), name); 5022e538c4aSArnaldo Carvalho de Melo if (sym == NULL) 503682b335aSArnaldo Carvalho de Melo return -ENOMEM; 50482164161SArnaldo Carvalho de Melo /* 50582164161SArnaldo Carvalho de Melo * We will pass the symbols to the filter later, in 5064e06255fSArnaldo Carvalho de Melo * map__split_kallsyms, when we have split the maps per module 50782164161SArnaldo Carvalho de Melo */ 5084e06255fSArnaldo Carvalho de Melo symbols__insert(root, sym); 509a1645ce1SZhang, Yanmin 510682b335aSArnaldo Carvalho de Melo return 0; 5112e538c4aSArnaldo Carvalho de Melo } 5122e538c4aSArnaldo Carvalho de Melo 513682b335aSArnaldo Carvalho de Melo /* 514682b335aSArnaldo Carvalho de Melo * Loads the function entries in /proc/kallsyms into kernel_map->dso, 515682b335aSArnaldo Carvalho de Melo * so that we can in the next step set the symbol ->end address and then 516682b335aSArnaldo Carvalho de Melo * call kernel_maps__split_kallsyms. 517682b335aSArnaldo Carvalho de Melo */ 518aeafcbafSArnaldo Carvalho de Melo static int dso__load_all_kallsyms(struct dso *dso, const char *filename, 5199e201442SArnaldo Carvalho de Melo struct map *map) 520682b335aSArnaldo Carvalho de Melo { 521aeafcbafSArnaldo Carvalho de Melo struct process_kallsyms_args args = { .map = map, .dso = dso, }; 5229e201442SArnaldo Carvalho de Melo return kallsyms__parse(filename, &args, map__process_kallsym_symbol); 5232e538c4aSArnaldo Carvalho de Melo } 5242e538c4aSArnaldo Carvalho de Melo 5252e538c4aSArnaldo Carvalho de Melo /* 5262e538c4aSArnaldo Carvalho de Melo * Split the symbols into maps, making sure there are no overlaps, i.e. the 5272e538c4aSArnaldo Carvalho de Melo * kernel range is broken in several maps, named [kernel].N, as we don't have 5282e538c4aSArnaldo Carvalho de Melo * the original ELF section names vmlinux have. 5292e538c4aSArnaldo Carvalho de Melo */ 530aeafcbafSArnaldo Carvalho de Melo static int dso__split_kallsyms(struct dso *dso, struct map *map, 5319de89fe7SArnaldo Carvalho de Melo symbol_filter_t filter) 5322e538c4aSArnaldo Carvalho de Melo { 5339de89fe7SArnaldo Carvalho de Melo struct map_groups *kmaps = map__kmap(map)->kmaps; 53423346f21SArnaldo Carvalho de Melo struct machine *machine = kmaps->machine; 5354e06255fSArnaldo Carvalho de Melo struct map *curr_map = map; 5362e538c4aSArnaldo Carvalho de Melo struct symbol *pos; 5378a953312SArnaldo Carvalho de Melo int count = 0, moved = 0; 538aeafcbafSArnaldo Carvalho de Melo struct rb_root *root = &dso->symbols[map->type]; 5394e06255fSArnaldo Carvalho de Melo struct rb_node *next = rb_first(root); 5402e538c4aSArnaldo Carvalho de Melo int kernel_range = 0; 5412e538c4aSArnaldo Carvalho de Melo 5422e538c4aSArnaldo Carvalho de Melo while (next) { 5432e538c4aSArnaldo Carvalho de Melo char *module; 5442e538c4aSArnaldo Carvalho de Melo 5452e538c4aSArnaldo Carvalho de Melo pos = rb_entry(next, struct symbol, rb_node); 5462e538c4aSArnaldo Carvalho de Melo next = rb_next(&pos->rb_node); 5472e538c4aSArnaldo Carvalho de Melo 5482e538c4aSArnaldo Carvalho de Melo module = strchr(pos->name, '\t'); 5492e538c4aSArnaldo Carvalho de Melo if (module) { 55075be6cf4SArnaldo Carvalho de Melo if (!symbol_conf.use_modules) 5511de8e245SArnaldo Carvalho de Melo goto discard_symbol; 5521de8e245SArnaldo Carvalho de Melo 5532e538c4aSArnaldo Carvalho de Melo *module++ = '\0'; 5542e538c4aSArnaldo Carvalho de Melo 555b7cece76SArnaldo Carvalho de Melo if (strcmp(curr_map->dso->short_name, module)) { 556a1645ce1SZhang, Yanmin if (curr_map != map && 557aeafcbafSArnaldo Carvalho de Melo dso->kernel == DSO_TYPE_GUEST_KERNEL && 55823346f21SArnaldo Carvalho de Melo machine__is_default_guest(machine)) { 559a1645ce1SZhang, Yanmin /* 560a1645ce1SZhang, Yanmin * We assume all symbols of a module are 561a1645ce1SZhang, Yanmin * continuous in * kallsyms, so curr_map 562a1645ce1SZhang, Yanmin * points to a module and all its 563a1645ce1SZhang, Yanmin * symbols are in its kmap. Mark it as 564a1645ce1SZhang, Yanmin * loaded. 565a1645ce1SZhang, Yanmin */ 566a1645ce1SZhang, Yanmin dso__set_loaded(curr_map->dso, 567a1645ce1SZhang, Yanmin curr_map->type); 568af427bf5SArnaldo Carvalho de Melo } 569b7cece76SArnaldo Carvalho de Melo 570a1645ce1SZhang, Yanmin curr_map = map_groups__find_by_name(kmaps, 571a1645ce1SZhang, Yanmin map->type, module); 572a1645ce1SZhang, Yanmin if (curr_map == NULL) { 5732f51903bSArnaldo Carvalho de Melo pr_debug("%s/proc/{kallsyms,modules} " 574a1645ce1SZhang, Yanmin "inconsistency while looking " 575a1645ce1SZhang, Yanmin "for \"%s\" module!\n", 57623346f21SArnaldo Carvalho de Melo machine->root_dir, module); 577a1645ce1SZhang, Yanmin curr_map = map; 578a1645ce1SZhang, Yanmin goto discard_symbol; 579a1645ce1SZhang, Yanmin } 580a1645ce1SZhang, Yanmin 581a1645ce1SZhang, Yanmin if (curr_map->dso->loaded && 58223346f21SArnaldo Carvalho de Melo !machine__is_default_guest(machine)) 583b7cece76SArnaldo Carvalho de Melo goto discard_symbol; 584af427bf5SArnaldo Carvalho de Melo } 58586470930SIngo Molnar /* 5862e538c4aSArnaldo Carvalho de Melo * So that we look just like we get from .ko files, 5872e538c4aSArnaldo Carvalho de Melo * i.e. not prelinked, relative to map->start. 58886470930SIngo Molnar */ 5894e06255fSArnaldo Carvalho de Melo pos->start = curr_map->map_ip(curr_map, pos->start); 5904e06255fSArnaldo Carvalho de Melo pos->end = curr_map->map_ip(curr_map, pos->end); 5914e06255fSArnaldo Carvalho de Melo } else if (curr_map != map) { 5922e538c4aSArnaldo Carvalho de Melo char dso_name[PATH_MAX]; 593aeafcbafSArnaldo Carvalho de Melo struct dso *ndso; 59486470930SIngo Molnar 5958a953312SArnaldo Carvalho de Melo if (count == 0) { 5968a953312SArnaldo Carvalho de Melo curr_map = map; 5978a953312SArnaldo Carvalho de Melo goto filter_symbol; 5988a953312SArnaldo Carvalho de Melo } 5998a953312SArnaldo Carvalho de Melo 600aeafcbafSArnaldo Carvalho de Melo if (dso->kernel == DSO_TYPE_GUEST_KERNEL) 601a1645ce1SZhang, Yanmin snprintf(dso_name, sizeof(dso_name), 602a1645ce1SZhang, Yanmin "[guest.kernel].%d", 603a1645ce1SZhang, Yanmin kernel_range++); 604a1645ce1SZhang, Yanmin else 605a1645ce1SZhang, Yanmin snprintf(dso_name, sizeof(dso_name), 606a1645ce1SZhang, Yanmin "[kernel].%d", 6072e538c4aSArnaldo Carvalho de Melo kernel_range++); 60886470930SIngo Molnar 609aeafcbafSArnaldo Carvalho de Melo ndso = dso__new(dso_name); 610aeafcbafSArnaldo Carvalho de Melo if (ndso == NULL) 6112e538c4aSArnaldo Carvalho de Melo return -1; 6122e538c4aSArnaldo Carvalho de Melo 613aeafcbafSArnaldo Carvalho de Melo ndso->kernel = dso->kernel; 614a1645ce1SZhang, Yanmin 615aeafcbafSArnaldo Carvalho de Melo curr_map = map__new2(pos->start, ndso, map->type); 61637fe5fcbSZhang, Yanmin if (curr_map == NULL) { 617aeafcbafSArnaldo Carvalho de Melo dso__delete(ndso); 6182e538c4aSArnaldo Carvalho de Melo return -1; 6192e538c4aSArnaldo Carvalho de Melo } 6202e538c4aSArnaldo Carvalho de Melo 6214e06255fSArnaldo Carvalho de Melo curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; 6229de89fe7SArnaldo Carvalho de Melo map_groups__insert(kmaps, curr_map); 6232e538c4aSArnaldo Carvalho de Melo ++kernel_range; 6242e538c4aSArnaldo Carvalho de Melo } 6258a953312SArnaldo Carvalho de Melo filter_symbol: 6264e06255fSArnaldo Carvalho de Melo if (filter && filter(curr_map, pos)) { 6271de8e245SArnaldo Carvalho de Melo discard_symbol: rb_erase(&pos->rb_node, root); 62800a192b3SArnaldo Carvalho de Melo symbol__delete(pos); 6292e538c4aSArnaldo Carvalho de Melo } else { 6304e06255fSArnaldo Carvalho de Melo if (curr_map != map) { 6314e06255fSArnaldo Carvalho de Melo rb_erase(&pos->rb_node, root); 6324e06255fSArnaldo Carvalho de Melo symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); 6338a953312SArnaldo Carvalho de Melo ++moved; 6348a953312SArnaldo Carvalho de Melo } else 6358a953312SArnaldo Carvalho de Melo ++count; 6369974f496SMike Galbraith } 63786470930SIngo Molnar } 63886470930SIngo Molnar 639a1645ce1SZhang, Yanmin if (curr_map != map && 640aeafcbafSArnaldo Carvalho de Melo dso->kernel == DSO_TYPE_GUEST_KERNEL && 64123346f21SArnaldo Carvalho de Melo machine__is_default_guest(kmaps->machine)) { 642a1645ce1SZhang, Yanmin dso__set_loaded(curr_map->dso, curr_map->type); 643a1645ce1SZhang, Yanmin } 644a1645ce1SZhang, Yanmin 6458a953312SArnaldo Carvalho de Melo return count + moved; 64686470930SIngo Molnar } 64786470930SIngo Molnar 6483f067dcaSArnaldo Carvalho de Melo bool symbol__restricted_filename(const char *filename, 649ec80fde7SArnaldo Carvalho de Melo const char *restricted_filename) 650ec80fde7SArnaldo Carvalho de Melo { 651ec80fde7SArnaldo Carvalho de Melo bool restricted = false; 652ec80fde7SArnaldo Carvalho de Melo 653ec80fde7SArnaldo Carvalho de Melo if (symbol_conf.kptr_restrict) { 654ec80fde7SArnaldo Carvalho de Melo char *r = realpath(filename, NULL); 655ec80fde7SArnaldo Carvalho de Melo 656ec80fde7SArnaldo Carvalho de Melo if (r != NULL) { 657ec80fde7SArnaldo Carvalho de Melo restricted = strcmp(r, restricted_filename) == 0; 658ec80fde7SArnaldo Carvalho de Melo free(r); 659ec80fde7SArnaldo Carvalho de Melo return restricted; 660ec80fde7SArnaldo Carvalho de Melo } 661ec80fde7SArnaldo Carvalho de Melo } 662ec80fde7SArnaldo Carvalho de Melo 663ec80fde7SArnaldo Carvalho de Melo return restricted; 664ec80fde7SArnaldo Carvalho de Melo } 665ec80fde7SArnaldo Carvalho de Melo 666aeafcbafSArnaldo Carvalho de Melo int dso__load_kallsyms(struct dso *dso, const char *filename, 6679de89fe7SArnaldo Carvalho de Melo struct map *map, symbol_filter_t filter) 6682e538c4aSArnaldo Carvalho de Melo { 669ec80fde7SArnaldo Carvalho de Melo if (symbol__restricted_filename(filename, "/proc/kallsyms")) 670ec80fde7SArnaldo Carvalho de Melo return -1; 671ec80fde7SArnaldo Carvalho de Melo 672aeafcbafSArnaldo Carvalho de Melo if (dso__load_all_kallsyms(dso, filename, map) < 0) 6732e538c4aSArnaldo Carvalho de Melo return -1; 6742e538c4aSArnaldo Carvalho de Melo 675694bf407SAnton Blanchard symbols__fixup_duplicate(&dso->symbols[map->type]); 6763f5a4272SAnton Blanchard symbols__fixup_end(&dso->symbols[map->type]); 6773f5a4272SAnton Blanchard 678aeafcbafSArnaldo Carvalho de Melo if (dso->kernel == DSO_TYPE_GUEST_KERNEL) 67944f24cb3SJiri Olsa dso->symtab_type = DSO_BINARY_TYPE__GUEST_KALLSYMS; 680a1645ce1SZhang, Yanmin else 68144f24cb3SJiri Olsa dso->symtab_type = DSO_BINARY_TYPE__KALLSYMS; 6822e538c4aSArnaldo Carvalho de Melo 683aeafcbafSArnaldo Carvalho de Melo return dso__split_kallsyms(dso, map, filter); 684af427bf5SArnaldo Carvalho de Melo } 685af427bf5SArnaldo Carvalho de Melo 686aeafcbafSArnaldo Carvalho de Melo static int dso__load_perf_map(struct dso *dso, struct map *map, 6876beba7adSArnaldo Carvalho de Melo symbol_filter_t filter) 68880d496beSPekka Enberg { 68980d496beSPekka Enberg char *line = NULL; 69080d496beSPekka Enberg size_t n; 69180d496beSPekka Enberg FILE *file; 69280d496beSPekka Enberg int nr_syms = 0; 69380d496beSPekka Enberg 694aeafcbafSArnaldo Carvalho de Melo file = fopen(dso->long_name, "r"); 69580d496beSPekka Enberg if (file == NULL) 69680d496beSPekka Enberg goto out_failure; 69780d496beSPekka Enberg 69880d496beSPekka Enberg while (!feof(file)) { 6999cffa8d5SPaul Mackerras u64 start, size; 70080d496beSPekka Enberg struct symbol *sym; 70180d496beSPekka Enberg int line_len, len; 70280d496beSPekka Enberg 70380d496beSPekka Enberg line_len = getline(&line, &n, file); 70480d496beSPekka Enberg if (line_len < 0) 70580d496beSPekka Enberg break; 70680d496beSPekka Enberg 70780d496beSPekka Enberg if (!line) 70880d496beSPekka Enberg goto out_failure; 70980d496beSPekka Enberg 71080d496beSPekka Enberg line[--line_len] = '\0'; /* \n */ 71180d496beSPekka Enberg 71280d496beSPekka Enberg len = hex2u64(line, &start); 71380d496beSPekka Enberg 71480d496beSPekka Enberg len++; 71580d496beSPekka Enberg if (len + 2 >= line_len) 71680d496beSPekka Enberg continue; 71780d496beSPekka Enberg 71880d496beSPekka Enberg len += hex2u64(line + len, &size); 71980d496beSPekka Enberg 72080d496beSPekka Enberg len++; 72180d496beSPekka Enberg if (len + 2 >= line_len) 72280d496beSPekka Enberg continue; 72380d496beSPekka Enberg 724c408fedfSArnaldo Carvalho de Melo sym = symbol__new(start, size, STB_GLOBAL, line + len); 72580d496beSPekka Enberg 72680d496beSPekka Enberg if (sym == NULL) 72780d496beSPekka Enberg goto out_delete_line; 72880d496beSPekka Enberg 729439d473bSArnaldo Carvalho de Melo if (filter && filter(map, sym)) 73000a192b3SArnaldo Carvalho de Melo symbol__delete(sym); 73180d496beSPekka Enberg else { 732aeafcbafSArnaldo Carvalho de Melo symbols__insert(&dso->symbols[map->type], sym); 73380d496beSPekka Enberg nr_syms++; 73480d496beSPekka Enberg } 73580d496beSPekka Enberg } 73680d496beSPekka Enberg 73780d496beSPekka Enberg free(line); 73880d496beSPekka Enberg fclose(file); 73980d496beSPekka Enberg 74080d496beSPekka Enberg return nr_syms; 74180d496beSPekka Enberg 74280d496beSPekka Enberg out_delete_line: 74380d496beSPekka Enberg free(line); 74480d496beSPekka Enberg out_failure: 74580d496beSPekka Enberg return -1; 74680d496beSPekka Enberg } 74780d496beSPekka Enberg 748aeafcbafSArnaldo Carvalho de Melo int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter) 74986470930SIngo Molnar { 750c338aee8SArnaldo Carvalho de Melo char *name; 75186470930SIngo Molnar int ret = -1; 75244f24cb3SJiri Olsa u_int i; 75323346f21SArnaldo Carvalho de Melo struct machine *machine; 75444f24cb3SJiri Olsa char *root_dir = (char *) ""; 7553aafe5aeSCody P Schafer int ss_pos = 0; 7563aafe5aeSCody P Schafer struct symsrc ss_[2]; 7573aafe5aeSCody P Schafer struct symsrc *syms_ss = NULL, *runtime_ss = NULL; 75886470930SIngo Molnar 759aeafcbafSArnaldo Carvalho de Melo dso__set_loaded(dso, map->type); 76066bd8424SArnaldo Carvalho de Melo 761aeafcbafSArnaldo Carvalho de Melo if (dso->kernel == DSO_TYPE_KERNEL) 762aeafcbafSArnaldo Carvalho de Melo return dso__load_kernel_sym(dso, map, filter); 763aeafcbafSArnaldo Carvalho de Melo else if (dso->kernel == DSO_TYPE_GUEST_KERNEL) 764aeafcbafSArnaldo Carvalho de Melo return dso__load_guest_kernel_sym(dso, map, filter); 765a1645ce1SZhang, Yanmin 76623346f21SArnaldo Carvalho de Melo if (map->groups && map->groups->machine) 76723346f21SArnaldo Carvalho de Melo machine = map->groups->machine; 768a1645ce1SZhang, Yanmin else 76923346f21SArnaldo Carvalho de Melo machine = NULL; 770c338aee8SArnaldo Carvalho de Melo 771aeafcbafSArnaldo Carvalho de Melo dso->adjust_symbols = 0; 772f5812a7aSArnaldo Carvalho de Melo 773aeafcbafSArnaldo Carvalho de Melo if (strncmp(dso->name, "/tmp/perf-", 10) == 0) { 774981c1252SPekka Enberg struct stat st; 775981c1252SPekka Enberg 776e9b52ef2SVasiliy Kulikov if (lstat(dso->name, &st) < 0) 777981c1252SPekka Enberg return -1; 778981c1252SPekka Enberg 779981c1252SPekka Enberg if (st.st_uid && (st.st_uid != geteuid())) { 780981c1252SPekka Enberg pr_warning("File %s not owned by current user or root, " 781981c1252SPekka Enberg "ignoring it.\n", dso->name); 782981c1252SPekka Enberg return -1; 783981c1252SPekka Enberg } 784981c1252SPekka Enberg 785aeafcbafSArnaldo Carvalho de Melo ret = dso__load_perf_map(dso, map, filter); 78644f24cb3SJiri Olsa dso->symtab_type = ret > 0 ? DSO_BINARY_TYPE__JAVA_JIT : 78744f24cb3SJiri Olsa DSO_BINARY_TYPE__NOT_FOUND; 78894cb9e38SArnaldo Carvalho de Melo return ret; 78994cb9e38SArnaldo Carvalho de Melo } 79094cb9e38SArnaldo Carvalho de Melo 79144f24cb3SJiri Olsa if (machine) 79244f24cb3SJiri Olsa root_dir = machine->root_dir; 79344f24cb3SJiri Olsa 794164c800eSDavid Ahern name = malloc(PATH_MAX); 795164c800eSDavid Ahern if (!name) 796164c800eSDavid Ahern return -1; 797164c800eSDavid Ahern 7986da80ce8SDave Martin /* Iterate over candidate debug images. 7993aafe5aeSCody P Schafer * Keep track of "interesting" ones (those which have a symtab, dynsym, 8003aafe5aeSCody P Schafer * and/or opd section) for processing. 8016da80ce8SDave Martin */ 80244f24cb3SJiri Olsa for (i = 0; i < DSO_BINARY_TYPE__SYMTAB_CNT; i++) { 8033aafe5aeSCody P Schafer struct symsrc *ss = &ss_[ss_pos]; 8043aafe5aeSCody P Schafer bool next_slot = false; 80544f24cb3SJiri Olsa 806005f9294SCody P Schafer enum dso_binary_type symtab_type = binary_type_symtab[i]; 80744f24cb3SJiri Olsa 808005f9294SCody P Schafer if (dso__binary_type_file(dso, symtab_type, 80944f24cb3SJiri Olsa root_dir, name, PATH_MAX)) 8106da80ce8SDave Martin continue; 81186470930SIngo Molnar 8126da80ce8SDave Martin /* Name is now the name of the next image to try */ 8133aafe5aeSCody P Schafer if (symsrc__init(ss, dso, name, symtab_type) < 0) 8146da80ce8SDave Martin continue; 8156da80ce8SDave Martin 8163aafe5aeSCody P Schafer if (!syms_ss && symsrc__has_symtab(ss)) { 8173aafe5aeSCody P Schafer syms_ss = ss; 8183aafe5aeSCody P Schafer next_slot = true; 819d26cd12bSCody P Schafer } 820d26cd12bSCody P Schafer 8213aafe5aeSCody P Schafer if (!runtime_ss && symsrc__possibly_runtime(ss)) { 8223aafe5aeSCody P Schafer runtime_ss = ss; 8233aafe5aeSCody P Schafer next_slot = true; 824a44f605bSCody P Schafer } 82586470930SIngo Molnar 8263aafe5aeSCody P Schafer if (next_slot) { 8273aafe5aeSCody P Schafer ss_pos++; 82833ff581eSJiri Olsa 8293aafe5aeSCody P Schafer if (syms_ss && runtime_ss) 8306da80ce8SDave Martin break; 831a25e46c4SArnaldo Carvalho de Melo } 8323aafe5aeSCody P Schafer 8336da80ce8SDave Martin } 8346da80ce8SDave Martin 8353aafe5aeSCody P Schafer if (!runtime_ss && !syms_ss) 8363aafe5aeSCody P Schafer goto out_free; 8373aafe5aeSCody P Schafer 8383aafe5aeSCody P Schafer if (runtime_ss && !syms_ss) { 8393aafe5aeSCody P Schafer syms_ss = runtime_ss; 84060e4b10cSArnaldo Carvalho de Melo } 84160e4b10cSArnaldo Carvalho de Melo 8423aafe5aeSCody P Schafer /* We'll have to hope for the best */ 8433aafe5aeSCody P Schafer if (!runtime_ss && syms_ss) 8443aafe5aeSCody P Schafer runtime_ss = syms_ss; 8453aafe5aeSCody P Schafer 8463aafe5aeSCody P Schafer if (syms_ss) 8473aafe5aeSCody P Schafer ret = dso__load_sym(dso, map, syms_ss, runtime_ss, filter, 0); 8483aafe5aeSCody P Schafer else 8493aafe5aeSCody P Schafer ret = -1; 8503aafe5aeSCody P Schafer 851f47b58b7SDavid Ahern if (ret > 0) { 8523aafe5aeSCody P Schafer int nr_plt; 8533aafe5aeSCody P Schafer 8543aafe5aeSCody P Schafer nr_plt = dso__synthesize_plt_symbols(dso, runtime_ss, map, filter); 8553aafe5aeSCody P Schafer if (nr_plt > 0) 8563aafe5aeSCody P Schafer ret += nr_plt; 8573aafe5aeSCody P Schafer } 8583aafe5aeSCody P Schafer 8593aafe5aeSCody P Schafer for (; ss_pos > 0; ss_pos--) 8603aafe5aeSCody P Schafer symsrc__destroy(&ss_[ss_pos - 1]); 8613aafe5aeSCody P Schafer out_free: 86286470930SIngo Molnar free(name); 863aeafcbafSArnaldo Carvalho de Melo if (ret < 0 && strstr(dso->name, " (deleted)") != NULL) 8641340e6bbSArnaldo Carvalho de Melo return 0; 86586470930SIngo Molnar return ret; 86686470930SIngo Molnar } 86786470930SIngo Molnar 868aeafcbafSArnaldo Carvalho de Melo struct map *map_groups__find_by_name(struct map_groups *mg, 86979406cd7SArnaldo Carvalho de Melo enum map_type type, const char *name) 870439d473bSArnaldo Carvalho de Melo { 871439d473bSArnaldo Carvalho de Melo struct rb_node *nd; 872439d473bSArnaldo Carvalho de Melo 873aeafcbafSArnaldo Carvalho de Melo for (nd = rb_first(&mg->maps[type]); nd; nd = rb_next(nd)) { 874439d473bSArnaldo Carvalho de Melo struct map *map = rb_entry(nd, struct map, rb_node); 875439d473bSArnaldo Carvalho de Melo 876b7cece76SArnaldo Carvalho de Melo if (map->dso && strcmp(map->dso->short_name, name) == 0) 877439d473bSArnaldo Carvalho de Melo return map; 878439d473bSArnaldo Carvalho de Melo } 879439d473bSArnaldo Carvalho de Melo 880439d473bSArnaldo Carvalho de Melo return NULL; 881439d473bSArnaldo Carvalho de Melo } 882439d473bSArnaldo Carvalho de Melo 883aeafcbafSArnaldo Carvalho de Melo int dso__load_vmlinux(struct dso *dso, struct map *map, 8846beba7adSArnaldo Carvalho de Melo const char *vmlinux, symbol_filter_t filter) 88586470930SIngo Molnar { 886b68e2f91SCody P Schafer int err = -1; 887b68e2f91SCody P Schafer struct symsrc ss; 888ec5761eaSDavid Ahern char symfs_vmlinux[PATH_MAX]; 889005f9294SCody P Schafer enum dso_binary_type symtab_type; 89086470930SIngo Molnar 891*5698d2c9SNamhyung Kim if (vmlinux[0] == '/') 892*5698d2c9SNamhyung Kim snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s", vmlinux); 893*5698d2c9SNamhyung Kim else 894a639dc64SArnaldo Carvalho de Melo snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s%s", 895ec5761eaSDavid Ahern symbol_conf.symfs, vmlinux); 89686470930SIngo Molnar 89721ea4539SCody P Schafer if (dso->kernel == DSO_TYPE_GUEST_KERNEL) 898005f9294SCody P Schafer symtab_type = DSO_BINARY_TYPE__GUEST_VMLINUX; 89921ea4539SCody P Schafer else 900005f9294SCody P Schafer symtab_type = DSO_BINARY_TYPE__VMLINUX; 90121ea4539SCody P Schafer 902005f9294SCody P Schafer if (symsrc__init(&ss, dso, symfs_vmlinux, symtab_type)) 903b68e2f91SCody P Schafer return -1; 904b68e2f91SCody P Schafer 905261360b6SCody P Schafer err = dso__load_sym(dso, map, &ss, &ss, filter, 0); 906b68e2f91SCody P Schafer symsrc__destroy(&ss); 90786470930SIngo Molnar 908515850e4SCody P Schafer if (err > 0) { 909515850e4SCody P Schafer dso__set_long_name(dso, (char *)vmlinux); 910515850e4SCody P Schafer dso__set_loaded(dso, map->type); 911ec5761eaSDavid Ahern pr_debug("Using %s for symbols\n", symfs_vmlinux); 912515850e4SCody P Schafer } 9133846df2eSArnaldo Carvalho de Melo 91486470930SIngo Molnar return err; 91586470930SIngo Molnar } 91686470930SIngo Molnar 917aeafcbafSArnaldo Carvalho de Melo int dso__load_vmlinux_path(struct dso *dso, struct map *map, 9189de89fe7SArnaldo Carvalho de Melo symbol_filter_t filter) 919a19afe46SArnaldo Carvalho de Melo { 920a19afe46SArnaldo Carvalho de Melo int i, err = 0; 9215ad90e4eSArnaldo Carvalho de Melo char *filename; 922a19afe46SArnaldo Carvalho de Melo 923a19afe46SArnaldo Carvalho de Melo pr_debug("Looking at the vmlinux_path (%d entries long)\n", 9245ad90e4eSArnaldo Carvalho de Melo vmlinux_path__nr_entries + 1); 9255ad90e4eSArnaldo Carvalho de Melo 926aeafcbafSArnaldo Carvalho de Melo filename = dso__build_id_filename(dso, NULL, 0); 9275ad90e4eSArnaldo Carvalho de Melo if (filename != NULL) { 928aeafcbafSArnaldo Carvalho de Melo err = dso__load_vmlinux(dso, map, filename, filter); 929b7c14a0bSDavid Ahern if (err > 0) { 930b7c14a0bSDavid Ahern dso->lname_alloc = 1; 9315ad90e4eSArnaldo Carvalho de Melo goto out; 932b7c14a0bSDavid Ahern } 9335ad90e4eSArnaldo Carvalho de Melo free(filename); 9345ad90e4eSArnaldo Carvalho de Melo } 935a19afe46SArnaldo Carvalho de Melo 936a19afe46SArnaldo Carvalho de Melo for (i = 0; i < vmlinux_path__nr_entries; ++i) { 937aeafcbafSArnaldo Carvalho de Melo err = dso__load_vmlinux(dso, map, vmlinux_path[i], filter); 938a19afe46SArnaldo Carvalho de Melo if (err > 0) { 939aeafcbafSArnaldo Carvalho de Melo dso__set_long_name(dso, strdup(vmlinux_path[i])); 940b7c14a0bSDavid Ahern dso->lname_alloc = 1; 941a19afe46SArnaldo Carvalho de Melo break; 942a19afe46SArnaldo Carvalho de Melo } 943a19afe46SArnaldo Carvalho de Melo } 9445ad90e4eSArnaldo Carvalho de Melo out: 945a19afe46SArnaldo Carvalho de Melo return err; 946a19afe46SArnaldo Carvalho de Melo } 947a19afe46SArnaldo Carvalho de Melo 948aeafcbafSArnaldo Carvalho de Melo static int dso__load_kernel_sym(struct dso *dso, struct map *map, 9499de89fe7SArnaldo Carvalho de Melo symbol_filter_t filter) 95086470930SIngo Molnar { 951cc612d81SArnaldo Carvalho de Melo int err; 9529e201442SArnaldo Carvalho de Melo const char *kallsyms_filename = NULL; 9539e201442SArnaldo Carvalho de Melo char *kallsyms_allocated_filename = NULL; 954dc8d6ab2SArnaldo Carvalho de Melo /* 955b226a5a7SDavid Ahern * Step 1: if the user specified a kallsyms or vmlinux filename, use 956b226a5a7SDavid Ahern * it and only it, reporting errors to the user if it cannot be used. 957dc8d6ab2SArnaldo Carvalho de Melo * 958dc8d6ab2SArnaldo Carvalho de Melo * For instance, try to analyse an ARM perf.data file _without_ a 959dc8d6ab2SArnaldo Carvalho de Melo * build-id, or if the user specifies the wrong path to the right 960dc8d6ab2SArnaldo Carvalho de Melo * vmlinux file, obviously we can't fallback to another vmlinux (a 961dc8d6ab2SArnaldo Carvalho de Melo * x86_86 one, on the machine where analysis is being performed, say), 962dc8d6ab2SArnaldo Carvalho de Melo * or worse, /proc/kallsyms. 963dc8d6ab2SArnaldo Carvalho de Melo * 964dc8d6ab2SArnaldo Carvalho de Melo * If the specified file _has_ a build-id and there is a build-id 965dc8d6ab2SArnaldo Carvalho de Melo * section in the perf.data file, we will still do the expected 966dc8d6ab2SArnaldo Carvalho de Melo * validation in dso__load_vmlinux and will bail out if they don't 967dc8d6ab2SArnaldo Carvalho de Melo * match. 968dc8d6ab2SArnaldo Carvalho de Melo */ 969b226a5a7SDavid Ahern if (symbol_conf.kallsyms_name != NULL) { 970b226a5a7SDavid Ahern kallsyms_filename = symbol_conf.kallsyms_name; 971b226a5a7SDavid Ahern goto do_kallsyms; 972b226a5a7SDavid Ahern } 973b226a5a7SDavid Ahern 974dc8d6ab2SArnaldo Carvalho de Melo if (symbol_conf.vmlinux_name != NULL) { 975aeafcbafSArnaldo Carvalho de Melo err = dso__load_vmlinux(dso, map, 976dc8d6ab2SArnaldo Carvalho de Melo symbol_conf.vmlinux_name, filter); 977e7dadc00SArnaldo Carvalho de Melo if (err > 0) { 978aeafcbafSArnaldo Carvalho de Melo dso__set_long_name(dso, 979e7dadc00SArnaldo Carvalho de Melo strdup(symbol_conf.vmlinux_name)); 980b7c14a0bSDavid Ahern dso->lname_alloc = 1; 981e7dadc00SArnaldo Carvalho de Melo goto out_fixup; 982e7dadc00SArnaldo Carvalho de Melo } 983e7dadc00SArnaldo Carvalho de Melo return err; 984dc8d6ab2SArnaldo Carvalho de Melo } 985439d473bSArnaldo Carvalho de Melo 986cc612d81SArnaldo Carvalho de Melo if (vmlinux_path != NULL) { 987aeafcbafSArnaldo Carvalho de Melo err = dso__load_vmlinux_path(dso, map, filter); 988a19afe46SArnaldo Carvalho de Melo if (err > 0) 989cc612d81SArnaldo Carvalho de Melo goto out_fixup; 990cc612d81SArnaldo Carvalho de Melo } 991cc612d81SArnaldo Carvalho de Melo 992ec5761eaSDavid Ahern /* do not try local files if a symfs was given */ 993ec5761eaSDavid Ahern if (symbol_conf.symfs[0] != 0) 994ec5761eaSDavid Ahern return -1; 995ec5761eaSDavid Ahern 996b7cece76SArnaldo Carvalho de Melo /* 997b7cece76SArnaldo Carvalho de Melo * Say the kernel DSO was created when processing the build-id header table, 998b7cece76SArnaldo Carvalho de Melo * we have a build-id, so check if it is the same as the running kernel, 999b7cece76SArnaldo Carvalho de Melo * using it if it is. 1000b7cece76SArnaldo Carvalho de Melo */ 1001aeafcbafSArnaldo Carvalho de Melo if (dso->has_build_id) { 1002b7cece76SArnaldo Carvalho de Melo u8 kallsyms_build_id[BUILD_ID_SIZE]; 10039e201442SArnaldo Carvalho de Melo char sbuild_id[BUILD_ID_SIZE * 2 + 1]; 1004b7cece76SArnaldo Carvalho de Melo 1005b7cece76SArnaldo Carvalho de Melo if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id, 10068d0591f6SArnaldo Carvalho de Melo sizeof(kallsyms_build_id)) == 0) { 1007aeafcbafSArnaldo Carvalho de Melo if (dso__build_id_equal(dso, kallsyms_build_id)) { 10089e201442SArnaldo Carvalho de Melo kallsyms_filename = "/proc/kallsyms"; 1009b7cece76SArnaldo Carvalho de Melo goto do_kallsyms; 10108d0591f6SArnaldo Carvalho de Melo } 10119e201442SArnaldo Carvalho de Melo } 1012dc8d6ab2SArnaldo Carvalho de Melo /* 1013dc8d6ab2SArnaldo Carvalho de Melo * Now look if we have it on the build-id cache in 1014dc8d6ab2SArnaldo Carvalho de Melo * $HOME/.debug/[kernel.kallsyms]. 1015dc8d6ab2SArnaldo Carvalho de Melo */ 1016aeafcbafSArnaldo Carvalho de Melo build_id__sprintf(dso->build_id, sizeof(dso->build_id), 10179e201442SArnaldo Carvalho de Melo sbuild_id); 10189e201442SArnaldo Carvalho de Melo 10199e201442SArnaldo Carvalho de Melo if (asprintf(&kallsyms_allocated_filename, 10209e201442SArnaldo Carvalho de Melo "%s/.debug/[kernel.kallsyms]/%s", 10213846df2eSArnaldo Carvalho de Melo getenv("HOME"), sbuild_id) == -1) { 10223846df2eSArnaldo Carvalho de Melo pr_err("Not enough memory for kallsyms file lookup\n"); 10238d0591f6SArnaldo Carvalho de Melo return -1; 10243846df2eSArnaldo Carvalho de Melo } 10258d0591f6SArnaldo Carvalho de Melo 102619fc2dedSArnaldo Carvalho de Melo kallsyms_filename = kallsyms_allocated_filename; 102719fc2dedSArnaldo Carvalho de Melo 1028dc8d6ab2SArnaldo Carvalho de Melo if (access(kallsyms_filename, F_OK)) { 10293846df2eSArnaldo Carvalho de Melo pr_err("No kallsyms or vmlinux with build-id %s " 10303846df2eSArnaldo Carvalho de Melo "was found\n", sbuild_id); 10319e201442SArnaldo Carvalho de Melo free(kallsyms_allocated_filename); 1032dc8d6ab2SArnaldo Carvalho de Melo return -1; 1033ef6ae724SArnaldo Carvalho de Melo } 1034dc8d6ab2SArnaldo Carvalho de Melo } else { 1035dc8d6ab2SArnaldo Carvalho de Melo /* 1036dc8d6ab2SArnaldo Carvalho de Melo * Last resort, if we don't have a build-id and couldn't find 1037dc8d6ab2SArnaldo Carvalho de Melo * any vmlinux file, try the running kernel kallsyms table. 1038dc8d6ab2SArnaldo Carvalho de Melo */ 1039dc8d6ab2SArnaldo Carvalho de Melo kallsyms_filename = "/proc/kallsyms"; 1040dc8d6ab2SArnaldo Carvalho de Melo } 1041dc8d6ab2SArnaldo Carvalho de Melo 1042dc8d6ab2SArnaldo Carvalho de Melo do_kallsyms: 1043aeafcbafSArnaldo Carvalho de Melo err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); 10443846df2eSArnaldo Carvalho de Melo if (err > 0) 10453846df2eSArnaldo Carvalho de Melo pr_debug("Using %s for symbols\n", kallsyms_filename); 1046dc8d6ab2SArnaldo Carvalho de Melo free(kallsyms_allocated_filename); 1047dc8d6ab2SArnaldo Carvalho de Melo 1048439d473bSArnaldo Carvalho de Melo if (err > 0) { 1049aeafcbafSArnaldo Carvalho de Melo dso__set_long_name(dso, strdup("[kernel.kallsyms]")); 10500a0317b4SCody P Schafer out_fixup: 10516a4694a4SArnaldo Carvalho de Melo map__fixup_start(map); 10526a4694a4SArnaldo Carvalho de Melo map__fixup_end(map); 1053439d473bSArnaldo Carvalho de Melo } 105494cb9e38SArnaldo Carvalho de Melo 105586470930SIngo Molnar return err; 105686470930SIngo Molnar } 105786470930SIngo Molnar 1058aeafcbafSArnaldo Carvalho de Melo static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map, 1059a1645ce1SZhang, Yanmin symbol_filter_t filter) 1060a1645ce1SZhang, Yanmin { 1061a1645ce1SZhang, Yanmin int err; 1062a1645ce1SZhang, Yanmin const char *kallsyms_filename = NULL; 106323346f21SArnaldo Carvalho de Melo struct machine *machine; 1064a1645ce1SZhang, Yanmin char path[PATH_MAX]; 1065a1645ce1SZhang, Yanmin 1066a1645ce1SZhang, Yanmin if (!map->groups) { 1067a1645ce1SZhang, Yanmin pr_debug("Guest kernel map hasn't the point to groups\n"); 1068a1645ce1SZhang, Yanmin return -1; 1069a1645ce1SZhang, Yanmin } 107023346f21SArnaldo Carvalho de Melo machine = map->groups->machine; 1071a1645ce1SZhang, Yanmin 107223346f21SArnaldo Carvalho de Melo if (machine__is_default_guest(machine)) { 1073a1645ce1SZhang, Yanmin /* 1074a1645ce1SZhang, Yanmin * if the user specified a vmlinux filename, use it and only 1075a1645ce1SZhang, Yanmin * it, reporting errors to the user if it cannot be used. 1076a1645ce1SZhang, Yanmin * Or use file guest_kallsyms inputted by user on commandline 1077a1645ce1SZhang, Yanmin */ 1078a1645ce1SZhang, Yanmin if (symbol_conf.default_guest_vmlinux_name != NULL) { 1079aeafcbafSArnaldo Carvalho de Melo err = dso__load_vmlinux(dso, map, 1080a1645ce1SZhang, Yanmin symbol_conf.default_guest_vmlinux_name, filter); 1081a1645ce1SZhang, Yanmin goto out_try_fixup; 1082a1645ce1SZhang, Yanmin } 1083a1645ce1SZhang, Yanmin 1084a1645ce1SZhang, Yanmin kallsyms_filename = symbol_conf.default_guest_kallsyms; 1085a1645ce1SZhang, Yanmin if (!kallsyms_filename) 1086a1645ce1SZhang, Yanmin return -1; 1087a1645ce1SZhang, Yanmin } else { 108823346f21SArnaldo Carvalho de Melo sprintf(path, "%s/proc/kallsyms", machine->root_dir); 1089a1645ce1SZhang, Yanmin kallsyms_filename = path; 1090a1645ce1SZhang, Yanmin } 1091a1645ce1SZhang, Yanmin 1092aeafcbafSArnaldo Carvalho de Melo err = dso__load_kallsyms(dso, kallsyms_filename, map, filter); 1093a1645ce1SZhang, Yanmin if (err > 0) 1094a1645ce1SZhang, Yanmin pr_debug("Using %s for symbols\n", kallsyms_filename); 1095a1645ce1SZhang, Yanmin 1096a1645ce1SZhang, Yanmin out_try_fixup: 1097a1645ce1SZhang, Yanmin if (err > 0) { 1098a1645ce1SZhang, Yanmin if (kallsyms_filename != NULL) { 109948ea8f54SArnaldo Carvalho de Melo machine__mmap_name(machine, path, sizeof(path)); 1100aeafcbafSArnaldo Carvalho de Melo dso__set_long_name(dso, strdup(path)); 1101a1645ce1SZhang, Yanmin } 1102a1645ce1SZhang, Yanmin map__fixup_start(map); 1103a1645ce1SZhang, Yanmin map__fixup_end(map); 1104a1645ce1SZhang, Yanmin } 1105a1645ce1SZhang, Yanmin 1106a1645ce1SZhang, Yanmin return err; 1107a1645ce1SZhang, Yanmin } 1108cd84c2acSFrederic Weisbecker 1109cc612d81SArnaldo Carvalho de Melo static void vmlinux_path__exit(void) 11102446042cSArnaldo Carvalho de Melo { 1111cc612d81SArnaldo Carvalho de Melo while (--vmlinux_path__nr_entries >= 0) { 1112cc612d81SArnaldo Carvalho de Melo free(vmlinux_path[vmlinux_path__nr_entries]); 1113cc612d81SArnaldo Carvalho de Melo vmlinux_path[vmlinux_path__nr_entries] = NULL; 1114cc612d81SArnaldo Carvalho de Melo } 1115cc612d81SArnaldo Carvalho de Melo 1116cc612d81SArnaldo Carvalho de Melo free(vmlinux_path); 1117cc612d81SArnaldo Carvalho de Melo vmlinux_path = NULL; 1118cc612d81SArnaldo Carvalho de Melo } 1119cc612d81SArnaldo Carvalho de Melo 1120cc612d81SArnaldo Carvalho de Melo static int vmlinux_path__init(void) 1121cc612d81SArnaldo Carvalho de Melo { 1122cc612d81SArnaldo Carvalho de Melo struct utsname uts; 1123cc612d81SArnaldo Carvalho de Melo char bf[PATH_MAX]; 1124cc612d81SArnaldo Carvalho de Melo 1125cc612d81SArnaldo Carvalho de Melo vmlinux_path = malloc(sizeof(char *) * 5); 1126cc612d81SArnaldo Carvalho de Melo if (vmlinux_path == NULL) 1127cc612d81SArnaldo Carvalho de Melo return -1; 1128cc612d81SArnaldo Carvalho de Melo 1129cc612d81SArnaldo Carvalho de Melo vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux"); 1130cc612d81SArnaldo Carvalho de Melo if (vmlinux_path[vmlinux_path__nr_entries] == NULL) 1131cc612d81SArnaldo Carvalho de Melo goto out_fail; 1132cc612d81SArnaldo Carvalho de Melo ++vmlinux_path__nr_entries; 1133cc612d81SArnaldo Carvalho de Melo vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux"); 1134cc612d81SArnaldo Carvalho de Melo if (vmlinux_path[vmlinux_path__nr_entries] == NULL) 1135cc612d81SArnaldo Carvalho de Melo goto out_fail; 1136cc612d81SArnaldo Carvalho de Melo ++vmlinux_path__nr_entries; 1137ec5761eaSDavid Ahern 1138ec5761eaSDavid Ahern /* only try running kernel version if no symfs was given */ 1139ec5761eaSDavid Ahern if (symbol_conf.symfs[0] != 0) 1140ec5761eaSDavid Ahern return 0; 1141ec5761eaSDavid Ahern 1142ec5761eaSDavid Ahern if (uname(&uts) < 0) 1143ec5761eaSDavid Ahern return -1; 1144ec5761eaSDavid Ahern 1145cc612d81SArnaldo Carvalho de Melo snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", uts.release); 1146cc612d81SArnaldo Carvalho de Melo vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); 1147cc612d81SArnaldo Carvalho de Melo if (vmlinux_path[vmlinux_path__nr_entries] == NULL) 1148cc612d81SArnaldo Carvalho de Melo goto out_fail; 1149cc612d81SArnaldo Carvalho de Melo ++vmlinux_path__nr_entries; 1150cc612d81SArnaldo Carvalho de Melo snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", uts.release); 1151cc612d81SArnaldo Carvalho de Melo vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); 1152cc612d81SArnaldo Carvalho de Melo if (vmlinux_path[vmlinux_path__nr_entries] == NULL) 1153cc612d81SArnaldo Carvalho de Melo goto out_fail; 1154cc612d81SArnaldo Carvalho de Melo ++vmlinux_path__nr_entries; 1155cc612d81SArnaldo Carvalho de Melo snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux", 1156cc612d81SArnaldo Carvalho de Melo uts.release); 1157cc612d81SArnaldo Carvalho de Melo vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); 1158cc612d81SArnaldo Carvalho de Melo if (vmlinux_path[vmlinux_path__nr_entries] == NULL) 1159cc612d81SArnaldo Carvalho de Melo goto out_fail; 1160cc612d81SArnaldo Carvalho de Melo ++vmlinux_path__nr_entries; 1161cc612d81SArnaldo Carvalho de Melo 1162cc612d81SArnaldo Carvalho de Melo return 0; 1163cc612d81SArnaldo Carvalho de Melo 1164cc612d81SArnaldo Carvalho de Melo out_fail: 1165cc612d81SArnaldo Carvalho de Melo vmlinux_path__exit(); 1166cc612d81SArnaldo Carvalho de Melo return -1; 1167cc612d81SArnaldo Carvalho de Melo } 1168cc612d81SArnaldo Carvalho de Melo 1169655000e7SArnaldo Carvalho de Melo static int setup_list(struct strlist **list, const char *list_str, 1170655000e7SArnaldo Carvalho de Melo const char *list_name) 1171655000e7SArnaldo Carvalho de Melo { 1172655000e7SArnaldo Carvalho de Melo if (list_str == NULL) 1173655000e7SArnaldo Carvalho de Melo return 0; 1174655000e7SArnaldo Carvalho de Melo 1175655000e7SArnaldo Carvalho de Melo *list = strlist__new(true, list_str); 1176655000e7SArnaldo Carvalho de Melo if (!*list) { 1177655000e7SArnaldo Carvalho de Melo pr_err("problems parsing %s list\n", list_name); 1178655000e7SArnaldo Carvalho de Melo return -1; 1179655000e7SArnaldo Carvalho de Melo } 1180655000e7SArnaldo Carvalho de Melo return 0; 1181655000e7SArnaldo Carvalho de Melo } 1182655000e7SArnaldo Carvalho de Melo 1183ec80fde7SArnaldo Carvalho de Melo static bool symbol__read_kptr_restrict(void) 1184ec80fde7SArnaldo Carvalho de Melo { 1185ec80fde7SArnaldo Carvalho de Melo bool value = false; 1186ec80fde7SArnaldo Carvalho de Melo 1187ec80fde7SArnaldo Carvalho de Melo if (geteuid() != 0) { 1188ec80fde7SArnaldo Carvalho de Melo FILE *fp = fopen("/proc/sys/kernel/kptr_restrict", "r"); 1189ec80fde7SArnaldo Carvalho de Melo if (fp != NULL) { 1190ec80fde7SArnaldo Carvalho de Melo char line[8]; 1191ec80fde7SArnaldo Carvalho de Melo 1192ec80fde7SArnaldo Carvalho de Melo if (fgets(line, sizeof(line), fp) != NULL) 1193ec80fde7SArnaldo Carvalho de Melo value = atoi(line) != 0; 1194ec80fde7SArnaldo Carvalho de Melo 1195ec80fde7SArnaldo Carvalho de Melo fclose(fp); 1196ec80fde7SArnaldo Carvalho de Melo } 1197ec80fde7SArnaldo Carvalho de Melo } 1198ec80fde7SArnaldo Carvalho de Melo 1199ec80fde7SArnaldo Carvalho de Melo return value; 1200ec80fde7SArnaldo Carvalho de Melo } 1201ec80fde7SArnaldo Carvalho de Melo 120275be6cf4SArnaldo Carvalho de Melo int symbol__init(void) 1203cc612d81SArnaldo Carvalho de Melo { 1204ec5761eaSDavid Ahern const char *symfs; 1205ec5761eaSDavid Ahern 120685e00b55SJovi Zhang if (symbol_conf.initialized) 120785e00b55SJovi Zhang return 0; 120885e00b55SJovi Zhang 12099ac3e487SIrina Tirdea symbol_conf.priv_size = PERF_ALIGN(symbol_conf.priv_size, sizeof(u64)); 12104d439517SDavid S. Miller 1211166ccc9cSNamhyung Kim symbol__elf_init(); 1212166ccc9cSNamhyung Kim 121375be6cf4SArnaldo Carvalho de Melo if (symbol_conf.sort_by_name) 121475be6cf4SArnaldo Carvalho de Melo symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - 121579406cd7SArnaldo Carvalho de Melo sizeof(struct symbol)); 1216b32d133aSArnaldo Carvalho de Melo 121775be6cf4SArnaldo Carvalho de Melo if (symbol_conf.try_vmlinux_path && vmlinux_path__init() < 0) 1218cc612d81SArnaldo Carvalho de Melo return -1; 1219cc612d81SArnaldo Carvalho de Melo 1220c410a338SArnaldo Carvalho de Melo if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { 1221c410a338SArnaldo Carvalho de Melo pr_err("'.' is the only non valid --field-separator argument\n"); 1222c410a338SArnaldo Carvalho de Melo return -1; 1223c410a338SArnaldo Carvalho de Melo } 1224c410a338SArnaldo Carvalho de Melo 1225655000e7SArnaldo Carvalho de Melo if (setup_list(&symbol_conf.dso_list, 1226655000e7SArnaldo Carvalho de Melo symbol_conf.dso_list_str, "dso") < 0) 1227655000e7SArnaldo Carvalho de Melo return -1; 1228655000e7SArnaldo Carvalho de Melo 1229655000e7SArnaldo Carvalho de Melo if (setup_list(&symbol_conf.comm_list, 1230655000e7SArnaldo Carvalho de Melo symbol_conf.comm_list_str, "comm") < 0) 1231655000e7SArnaldo Carvalho de Melo goto out_free_dso_list; 1232655000e7SArnaldo Carvalho de Melo 1233655000e7SArnaldo Carvalho de Melo if (setup_list(&symbol_conf.sym_list, 1234655000e7SArnaldo Carvalho de Melo symbol_conf.sym_list_str, "symbol") < 0) 1235655000e7SArnaldo Carvalho de Melo goto out_free_comm_list; 1236655000e7SArnaldo Carvalho de Melo 1237ec5761eaSDavid Ahern /* 1238ec5761eaSDavid Ahern * A path to symbols of "/" is identical to "" 1239ec5761eaSDavid Ahern * reset here for simplicity. 1240ec5761eaSDavid Ahern */ 1241ec5761eaSDavid Ahern symfs = realpath(symbol_conf.symfs, NULL); 1242ec5761eaSDavid Ahern if (symfs == NULL) 1243ec5761eaSDavid Ahern symfs = symbol_conf.symfs; 1244ec5761eaSDavid Ahern if (strcmp(symfs, "/") == 0) 1245ec5761eaSDavid Ahern symbol_conf.symfs = ""; 1246ec5761eaSDavid Ahern if (symfs != symbol_conf.symfs) 1247ec5761eaSDavid Ahern free((void *)symfs); 1248ec5761eaSDavid Ahern 1249ec80fde7SArnaldo Carvalho de Melo symbol_conf.kptr_restrict = symbol__read_kptr_restrict(); 1250ec80fde7SArnaldo Carvalho de Melo 125185e00b55SJovi Zhang symbol_conf.initialized = true; 12524aa65636SArnaldo Carvalho de Melo return 0; 1253655000e7SArnaldo Carvalho de Melo 1254655000e7SArnaldo Carvalho de Melo out_free_comm_list: 1255655000e7SArnaldo Carvalho de Melo strlist__delete(symbol_conf.comm_list); 1256d74c896bSNamhyung Kim out_free_dso_list: 1257d74c896bSNamhyung Kim strlist__delete(symbol_conf.dso_list); 1258655000e7SArnaldo Carvalho de Melo return -1; 1259cc612d81SArnaldo Carvalho de Melo } 1260cc612d81SArnaldo Carvalho de Melo 1261d65a458bSArnaldo Carvalho de Melo void symbol__exit(void) 1262d65a458bSArnaldo Carvalho de Melo { 126385e00b55SJovi Zhang if (!symbol_conf.initialized) 126485e00b55SJovi Zhang return; 1265d65a458bSArnaldo Carvalho de Melo strlist__delete(symbol_conf.sym_list); 1266d65a458bSArnaldo Carvalho de Melo strlist__delete(symbol_conf.dso_list); 1267d65a458bSArnaldo Carvalho de Melo strlist__delete(symbol_conf.comm_list); 1268d65a458bSArnaldo Carvalho de Melo vmlinux_path__exit(); 1269d65a458bSArnaldo Carvalho de Melo symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL; 127085e00b55SJovi Zhang symbol_conf.initialized = false; 1271d65a458bSArnaldo Carvalho de Melo } 1272