SAFE public projects git trees. - safe/jmp/linux-2.6/blob - tools/perf/util/symbol.c

   1 #include "util.h"
   2 #include "../perf.h"
   3 #include "string.h"
   4 #include "symbol.h"
   5 #include "thread.h"
   6
   7 #include "debug.h"
   8
   9 #include <libelf.h>
  10 #include <gelf.h>
  11 #include <elf.h>
  12 #include <limits.h>
  13 #include <sys/utsname.h>
  14
  15 enum dso_origin {
  16         DSO__ORIG_KERNEL = 0,
  17         DSO__ORIG_JAVA_JIT,
  18         DSO__ORIG_FEDORA,
  19         DSO__ORIG_UBUNTU,
  20         DSO__ORIG_BUILDID,
  21         DSO__ORIG_DSO,
  22         DSO__ORIG_KMODULE,
  23         DSO__ORIG_NOT_FOUND,
  24 };
  25
  26 static void dsos__add(struct dso *dso);
  27 static struct dso *dsos__find(const char *name);
  28 static struct map *map__new2(u64 start, struct dso *dso);
  29 static void kernel_maps__insert(struct map *map);
  30 static int dso__load_kernel_sym(struct dso *self, struct map *map,
  31                                 symbol_filter_t filter);
  32 unsigned int symbol__priv_size;
  33
  34 static struct rb_root kernel_maps;
  35
  36 static void dso__fixup_sym_end(struct dso *self)
  37 {
  38         struct rb_node *nd, *prevnd = rb_first(&self->syms);
  39         struct symbol *curr, *prev;
  40
  41         if (prevnd == NULL)
  42                 return;
  43
  44         curr = rb_entry(prevnd, struct symbol, rb_node);
  45
  46         for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) {
  47                 prev = curr;
  48                 curr = rb_entry(nd, struct symbol, rb_node);
  49
  50                 if (prev->end == prev->start)
  51                         prev->end = curr->start - 1;
  52         }
  53
  54         /* Last entry */
  55         if (curr->end == curr->start)
  56                 curr->end = roundup(curr->start, 4096);
  57 }
  58
  59 static void kernel_maps__fixup_end(void)
  60 {
  61         struct map *prev, *curr;
  62         struct rb_node *nd, *prevnd = rb_first(&kernel_maps);
  63
  64         if (prevnd == NULL)
  65                 return;
  66
  67         curr = rb_entry(prevnd, struct map, rb_node);
  68
  69         for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) {
  70                 prev = curr;
  71                 curr = rb_entry(nd, struct map, rb_node);
  72                 prev->end = curr->start - 1;
  73         }
  74 }
  75
  76 static struct symbol *symbol__new(u64 start, u64 len, const char *name)
  77 {
  78         size_t namelen = strlen(name) + 1;
  79         struct symbol *self = calloc(1, (symbol__priv_size +
  80                                          sizeof(*self) + namelen));
  81         if (!self)
  82                 return NULL;
  83
  84         if (symbol__priv_size) {
  85                 memset(self, 0, symbol__priv_size);
  86                 self = ((void *)self) + symbol__priv_size;
  87         }
  88         self->start = start;
  89         self->end   = len ? start + len - 1 : start;
  90
  91         pr_debug3("%s: %s %#Lx-%#Lx\n", __func__, name, start, self->end);
  92
  93         memcpy(self->name, name, namelen);
  94
  95         return self;
  96 }
  97
  98 static void symbol__delete(struct symbol *self)
  99 {
 100         free(((void *)self) - symbol__priv_size);
 101 }
 102
 103 static size_t symbol__fprintf(struct symbol *self, FILE *fp)
 104 {
 105         return fprintf(fp, " %llx-%llx %s\n",
 106                        self->start, self->end, self->name);
 107 }
 108
 109 static void dso__set_long_name(struct dso *self, char *name)
 110 {
 111         self->long_name = name;
 112         self->long_name_len = strlen(name);
 113 }
 114
 115 static void dso__set_basename(struct dso *self)
 116 {
 117         self->short_name = basename(self->long_name);
 118 }
 119
 120 struct dso *dso__new(const char *name)
 121 {
 122         struct dso *self = malloc(sizeof(*self) + strlen(name) + 1);
 123
 124         if (self != NULL) {
 125                 strcpy(self->name, name);
 126                 dso__set_long_name(self, self->name);
 127                 self->short_name = self->name;
 128                 self->syms = RB_ROOT;
 129                 self->find_symbol = dso__find_symbol;
 130                 self->slen_calculated = 0;
 131                 self->origin = DSO__ORIG_NOT_FOUND;
 132                 self->loaded = 0;
 133                 self->has_build_id = 0;
 134         }
 135
 136         return self;
 137 }
 138
 139 static void dso__delete_symbols(struct dso *self)
 140 {
 141         struct symbol *pos;
 142         struct rb_node *next = rb_first(&self->syms);
 143
 144         while (next) {
 145                 pos = rb_entry(next, struct symbol, rb_node);
 146                 next = rb_next(&pos->rb_node);
 147                 rb_erase(&pos->rb_node, &self->syms);
 148                 symbol__delete(pos);
 149         }
 150 }
 151
 152 void dso__delete(struct dso *self)
 153 {
 154         dso__delete_symbols(self);
 155         if (self->long_name != self->name)
 156                 free(self->long_name);
 157         free(self);
 158 }
 159
 160 void dso__set_build_id(struct dso *self, void *build_id)
 161 {
 162         memcpy(self->build_id, build_id, sizeof(self->build_id));
 163         self->has_build_id = 1;
 164 }
 165
 166 static void dso__insert_symbol(struct dso *self, struct symbol *sym)
 167 {
 168         struct rb_node **p = &self->syms.rb_node;
 169         struct rb_node *parent = NULL;
 170         const u64 ip = sym->start;
 171         struct symbol *s;
 172
 173         while (*p != NULL) {
 174                 parent = *p;
 175                 s = rb_entry(parent, struct symbol, rb_node);
 176                 if (ip < s->start)
 177                         p = &(*p)->rb_left;
 178                 else
 179                         p = &(*p)->rb_right;
 180         }
 181         rb_link_node(&sym->rb_node, parent, p);
 182         rb_insert_color(&sym->rb_node, &self->syms);
 183 }
 184
 185 struct symbol *dso__find_symbol(struct dso *self, u64 ip)
 186 {
 187         struct rb_node *n;
 188
 189         if (self == NULL)
 190                 return NULL;
 191
 192         n = self->syms.rb_node;
 193
 194         while (n) {
 195                 struct symbol *s = rb_entry(n, struct symbol, rb_node);
 196
 197                 if (ip < s->start)
 198                         n = n->rb_left;
 199                 else if (ip > s->end)
 200                         n = n->rb_right;
 201                 else
 202                         return s;
 203         }
 204
 205         return NULL;
 206 }
 207
 208 int build_id__sprintf(u8 *self, int len, char *bf)
 209 {
 210         char *bid = bf;
 211         u8 *raw = self;
 212         int i;
 213
 214         for (i = 0; i < len; ++i) {
 215                 sprintf(bid, "%02x", *raw);
 216                 ++raw;
 217                 bid += 2;
 218         }
 219
 220         return raw - self;
 221 }
 222
 223 size_t dso__fprintf_buildid(struct dso *self, FILE *fp)
 224 {
 225         char sbuild_id[BUILD_ID_SIZE * 2 + 1];
 226
 227         build_id__sprintf(self->build_id, sizeof(self->build_id), sbuild_id);
 228         return fprintf(fp, "%s", sbuild_id);
 229 }
 230
 231 size_t dso__fprintf(struct dso *self, FILE *fp)
 232 {
 233         struct rb_node *nd;
 234         size_t ret = fprintf(fp, "dso: %s (", self->short_name);
 235
 236         ret += dso__fprintf_buildid(self, fp);
 237         ret += fprintf(fp, ")\n");
 238
 239         for (nd = rb_first(&self->syms); nd; nd = rb_next(nd)) {
 240                 struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
 241                 ret += symbol__fprintf(pos, fp);
 242         }
 243
 244         return ret;
 245 }
 246
 247 /*
 248  * Loads the function entries in /proc/kallsyms into kernel_map->dso,
 249  * so that we can in the next step set the symbol ->end address and then
 250  * call kernel_maps__split_kallsyms.
 251  */
 252 static int kernel_maps__load_all_kallsyms(void)
 253 {
 254         char *line = NULL;
 255         size_t n;
 256         FILE *file = fopen("/proc/kallsyms", "r");
 257
 258         if (file == NULL)
 259                 goto out_failure;
 260
 261         while (!feof(file)) {
 262                 u64 start;
 263                 struct symbol *sym;
 264                 int line_len, len;
 265                 char symbol_type;
 266                 char *symbol_name;
 267
 268                 line_len = getline(&line, &n, file);
 269                 if (line_len < 0)
 270                         break;
 271
 272                 if (!line)
 273                         goto out_failure;
 274
 275                 line[--line_len] = '\0'; /* \n */
 276
 277                 len = hex2u64(line, &start);
 278
 279                 len++;
 280                 if (len + 2 >= line_len)
 281                         continue;
 282
 283                 symbol_type = toupper(line[len]);
 284                 /*
 285                  * We're interested only in code ('T'ext)
 286                  */
 287                 if (symbol_type != 'T' && symbol_type != 'W')
 288                         continue;
 289
 290                 symbol_name = line + len + 2;
 291                 /*
 292                  * Will fix up the end later, when we have all symbols sorted.
 293                  */
 294                 sym = symbol__new(start, 0, symbol_name);
 295
 296                 if (sym == NULL)
 297                         goto out_delete_line;
 298
 299                 /*
 300                  * We will pass the symbols to the filter later, in
 301                  * kernel_maps__split_kallsyms, when we have split the
 302                  * maps per module
 303                  */
 304                 dso__insert_symbol(kernel_map->dso, sym);
 305         }
 306
 307         free(line);
 308         fclose(file);
 309
 310         return 0;
 311
 312 out_delete_line:
 313         free(line);
 314 out_failure:
 315         return -1;
 316 }
 317
 318 /*
 319  * Split the symbols into maps, making sure there are no overlaps, i.e. the
 320  * kernel range is broken in several maps, named [kernel].N, as we don't have
 321  * the original ELF section names vmlinux have.
 322  */
 323 static int kernel_maps__split_kallsyms(symbol_filter_t filter)
 324 {
 325         struct map *map = kernel_map;
 326         struct symbol *pos;
 327         int count = 0;
 328         struct rb_node *next = rb_first(&kernel_map->dso->syms);
 329         int kernel_range = 0;
 330
 331         while (next) {
 332                 char *module;
 333
 334                 pos = rb_entry(next, struct symbol, rb_node);
 335                 next = rb_next(&pos->rb_node);
 336
 337                 module = strchr(pos->name, '\t');
 338                 if (module) {
 339                         *module++ = '\0';
 340
 341                         if (strcmp(map->dso->name, module)) {
 342                                 map = kernel_maps__find_by_dso_name(module);
 343                                 if (!map) {
 344                                         pr_err("/proc/{kallsyms,modules} "
 345                                                "inconsistency!\n");
 346                                         return -1;
 347                                 }
 348                         }
 349                         /*
 350                          * So that we look just like we get from .ko files,
 351                          * i.e. not prelinked, relative to map->start.
 352                          */
 353                         pos->start = map->map_ip(map, pos->start);
 354                         pos->end   = map->map_ip(map, pos->end);
 355                 } else if (map != kernel_map) {
 356                         char dso_name[PATH_MAX];
 357                         struct dso *dso;
 358
 359                         snprintf(dso_name, sizeof(dso_name), "[kernel].%d",
 360                                  kernel_range++);
 361
 362                         dso = dso__new(dso_name);
 363                         if (dso == NULL)
 364                                 return -1;
 365
 366                         map = map__new2(pos->start, dso);
 367                         if (map == NULL) {
 368                                 dso__delete(dso);
 369                                 return -1;
 370                         }
 371
 372                         map->map_ip = map->unmap_ip = identity__map_ip;
 373                         kernel_maps__insert(map);
 374                         ++kernel_range;
 375                 }
 376
 377                 if (filter && filter(map, pos)) {
 378                         rb_erase(&pos->rb_node, &kernel_map->dso->syms);
 379                         symbol__delete(pos);
 380                 } else {
 381                         if (map != kernel_map) {
 382                                 rb_erase(&pos->rb_node, &kernel_map->dso->syms);
 383                                 dso__insert_symbol(map->dso, pos);
 384                         }
 385                         count++;
 386                 }
 387         }
 388
 389         return count;
 390 }
 391
 392
 393 static int kernel_maps__load_kallsyms(symbol_filter_t filter)
 394 {
 395         if (kernel_maps__load_all_kallsyms())
 396                 return -1;
 397
 398         dso__fixup_sym_end(kernel_map->dso);
 399         kernel_map->dso->origin = DSO__ORIG_KERNEL;
 400
 401         return kernel_maps__split_kallsyms(filter);
 402 }
 403
 404 size_t kernel_maps__fprintf(FILE *fp)
 405 {
 406         size_t printed = fprintf(fp, "Kernel maps:\n");
 407         struct rb_node *nd;
 408
 409         for (nd = rb_first(&kernel_maps); nd; nd = rb_next(nd)) {
 410                 struct map *pos = rb_entry(nd, struct map, rb_node);
 411
 412                 printed += fprintf(fp, "Map:");
 413                 printed += map__fprintf(pos, fp);
 414                 if (verbose > 1) {
 415                         printed += dso__fprintf(pos->dso, fp);
 416                         printed += fprintf(fp, "--\n");
 417                 }
 418         }
 419
 420         return printed + fprintf(fp, "END kernel maps\n");
 421 }
 422
 423 static int dso__load_perf_map(struct dso *self, struct map *map,
 424                               symbol_filter_t filter)
 425 {
 426         char *line = NULL;
 427         size_t n;
 428         FILE *file;
 429         int nr_syms = 0;
 430
 431         file = fopen(self->long_name, "r");
 432         if (file == NULL)
 433                 goto out_failure;
 434
 435         while (!feof(file)) {
 436                 u64 start, size;
 437                 struct symbol *sym;
 438                 int line_len, len;
 439
 440                 line_len = getline(&line, &n, file);
 441                 if (line_len < 0)
 442                         break;
 443
 444                 if (!line)
 445                         goto out_failure;
 446
 447                 line[--line_len] = '\0'; /* \n */
 448
 449                 len = hex2u64(line, &start);
 450
 451                 len++;
 452                 if (len + 2 >= line_len)
 453                         continue;
 454
 455                 len += hex2u64(line + len, &size);
 456
 457                 len++;
 458                 if (len + 2 >= line_len)
 459                         continue;
 460
 461                 sym = symbol__new(start, size, line + len);
 462
 463                 if (sym == NULL)
 464                         goto out_delete_line;
 465
 466                 if (filter && filter(map, sym))
 467                         symbol__delete(sym);
 468                 else {
 469                         dso__insert_symbol(self, sym);
 470                         nr_syms++;
 471                 }
 472         }
 473
 474         free(line);
 475         fclose(file);
 476
 477         return nr_syms;
 478
 479 out_delete_line:
 480         free(line);
 481 out_failure:
 482         return -1;
 483 }
 484
 485 /**
 486  * elf_symtab__for_each_symbol - iterate thru all the symbols
 487  *
 488  * @self: struct elf_symtab instance to iterate
 489  * @idx: uint32_t idx
 490  * @sym: GElf_Sym iterator
 491  */
 492 #define elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) \
 493         for (idx = 0, gelf_getsym(syms, idx, &sym);\
 494              idx < nr_syms; \
 495              idx++, gelf_getsym(syms, idx, &sym))
 496
 497 static inline uint8_t elf_sym__type(const GElf_Sym *sym)
 498 {
 499         return GELF_ST_TYPE(sym->st_info);
 500 }
 501
 502 static inline int elf_sym__is_function(const GElf_Sym *sym)
 503 {
 504         return elf_sym__type(sym) == STT_FUNC &&
 505                sym->st_name != 0 &&
 506                sym->st_shndx != SHN_UNDEF;
 507 }
 508
 509 static inline int elf_sym__is_label(const GElf_Sym *sym)
 510 {
 511         return elf_sym__type(sym) == STT_NOTYPE &&
 512                 sym->st_name != 0 &&
 513                 sym->st_shndx != SHN_UNDEF &&
 514                 sym->st_shndx != SHN_ABS;
 515 }
 516
 517 static inline const char *elf_sec__name(const GElf_Shdr *shdr,
 518                                         const Elf_Data *secstrs)
 519 {
 520         return secstrs->d_buf + shdr->sh_name;
 521 }
 522
 523 static inline int elf_sec__is_text(const GElf_Shdr *shdr,
 524                                         const Elf_Data *secstrs)
 525 {
 526         return strstr(elf_sec__name(shdr, secstrs), "text") != NULL;
 527 }
 528
 529 static inline const char *elf_sym__name(const GElf_Sym *sym,
 530                                         const Elf_Data *symstrs)
 531 {
 532         return symstrs->d_buf + sym->st_name;
 533 }
 534
 535 static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
 536                                     GElf_Shdr *shp, const char *name,
 537                                     size_t *idx)
 538 {
 539         Elf_Scn *sec = NULL;
 540         size_t cnt = 1;
 541
 542         while ((sec = elf_nextscn(elf, sec)) != NULL) {
 543                 char *str;
 544
 545                 gelf_getshdr(sec, shp);
 546                 str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name);
 547                 if (!strcmp(name, str)) {
 548                         if (idx)
 549                                 *idx = cnt;
 550                         break;
 551                 }
 552                 ++cnt;
 553         }
 554
 555         return sec;
 556 }
 557
 558 #define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \
 559         for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \
 560              idx < nr_entries; \
 561              ++idx, pos = gelf_getrel(reldata, idx, &pos_mem))
 562
 563 #define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \
 564         for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \
 565              idx < nr_entries; \
 566              ++idx, pos = gelf_getrela(reldata, idx, &pos_mem))
 567
 568 /*
 569  * We need to check if we have a .dynsym, so that we can handle the
 570  * .plt, synthesizing its symbols, that aren't on the symtabs (be it
 571  * .dynsym or .symtab).
 572  * And always look at the original dso, not at debuginfo packages, that
 573  * have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS).
 574  */
 575 static int dso__synthesize_plt_symbols(struct  dso *self, struct map *map,
 576                                        symbol_filter_t filter)
 577 {
 578         uint32_t nr_rel_entries, idx;
 579         GElf_Sym sym;
 580         u64 plt_offset;
 581         GElf_Shdr shdr_plt;
 582         struct symbol *f;
 583         GElf_Shdr shdr_rel_plt, shdr_dynsym;
 584         Elf_Data *reldata, *syms, *symstrs;
 585         Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym;
 586         size_t dynsym_idx;
 587         GElf_Ehdr ehdr;
 588         char sympltname[1024];
 589         Elf *elf;
 590         int nr = 0, symidx, fd, err = 0;
 591
 592         fd = open(self->long_name, O_RDONLY);
 593         if (fd < 0)
 594                 goto out;
 595
 596         elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
 597         if (elf == NULL)
 598                 goto out_close;
 599
 600         if (gelf_getehdr(elf, &ehdr) == NULL)
 601                 goto out_elf_end;
 602
 603         scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym,
 604                                          ".dynsym", &dynsym_idx);
 605         if (scn_dynsym == NULL)
 606                 goto out_elf_end;
 607
 608         scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,
 609                                           ".rela.plt", NULL);
 610         if (scn_plt_rel == NULL) {
 611                 scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,
 612                                                   ".rel.plt", NULL);
 613                 if (scn_plt_rel == NULL)
 614                         goto out_elf_end;
 615         }
 616
 617         err = -1;
 618
 619         if (shdr_rel_plt.sh_link != dynsym_idx)
 620                 goto out_elf_end;
 621
 622         if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL)
 623                 goto out_elf_end;
 624
 625         /*
 626          * Fetch the relocation section to find the idxes to the GOT
 627          * and the symbols in the .dynsym they refer to.
 628          */
 629         reldata = elf_getdata(scn_plt_rel, NULL);
 630         if (reldata == NULL)
 631                 goto out_elf_end;
 632
 633         syms = elf_getdata(scn_dynsym, NULL);
 634         if (syms == NULL)
 635                 goto out_elf_end;
 636
 637         scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link);
 638         if (scn_symstrs == NULL)
 639                 goto out_elf_end;
 640
 641         symstrs = elf_getdata(scn_symstrs, NULL);
 642         if (symstrs == NULL)
 643                 goto out_elf_end;
 644
 645         nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize;
 646         plt_offset = shdr_plt.sh_offset;
 647
 648         if (shdr_rel_plt.sh_type == SHT_RELA) {
 649                 GElf_Rela pos_mem, *pos;
 650
 651                 elf_section__for_each_rela(reldata, pos, pos_mem, idx,
 652                                            nr_rel_entries) {
 653                         symidx = GELF_R_SYM(pos->r_info);
 654                         plt_offset += shdr_plt.sh_entsize;
 655                         gelf_getsym(syms, symidx, &sym);
 656                         snprintf(sympltname, sizeof(sympltname),
 657                                  "%s@plt", elf_sym__name(&sym, symstrs));
 658
 659                         f = symbol__new(plt_offset, shdr_plt.sh_entsize,
 660                                         sympltname);
 661                         if (!f)
 662                                 goto out_elf_end;
 663
 664                         if (filter && filter(map, f))
 665                                 symbol__delete(f);
 666                         else {
 667                                 dso__insert_symbol(self, f);
 668                                 ++nr;
 669                         }
 670                 }
 671         } else if (shdr_rel_plt.sh_type == SHT_REL) {
 672                 GElf_Rel pos_mem, *pos;
 673                 elf_section__for_each_rel(reldata, pos, pos_mem, idx,
 674                                           nr_rel_entries) {
 675                         symidx = GELF_R_SYM(pos->r_info);
 676                         plt_offset += shdr_plt.sh_entsize;
 677                         gelf_getsym(syms, symidx, &sym);
 678                         snprintf(sympltname, sizeof(sympltname),
 679                                  "%s@plt", elf_sym__name(&sym, symstrs));
 680
 681                         f = symbol__new(plt_offset, shdr_plt.sh_entsize,
 682                                         sympltname);
 683                         if (!f)
 684                                 goto out_elf_end;
 685
 686                         if (filter && filter(map, f))
 687                                 symbol__delete(f);
 688                         else {
 689                                 dso__insert_symbol(self, f);
 690                                 ++nr;
 691                         }
 692                 }
 693         }
 694
 695         err = 0;
 696 out_elf_end:
 697         elf_end(elf);
 698 out_close:
 699         close(fd);
 700
 701         if (err == 0)
 702                 return nr;
 703 out:
 704         pr_warning("%s: problems reading %s PLT info.\n",
 705                    __func__, self->long_name);
 706         return 0;
 707 }
 708
 709 static int dso__load_sym(struct dso *self, struct map *map, const char *name,
 710                          int fd, symbol_filter_t filter, int kernel,
 711                          int kmodule)
 712 {
 713         struct map *curr_map = map;
 714         struct dso *curr_dso = self;
 715         size_t dso_name_len = strlen(self->short_name);
 716         Elf_Data *symstrs, *secstrs;
 717         uint32_t nr_syms;
 718         int err = -1;
 719         uint32_t idx;
 720         GElf_Ehdr ehdr;
 721         GElf_Shdr shdr;
 722         Elf_Data *syms;
 723         GElf_Sym sym;
 724         Elf_Scn *sec, *sec_strndx;
 725         Elf *elf;
 726         int nr = 0;
 727
 728         elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
 729         if (elf == NULL) {
 730                 pr_err("%s: cannot read %s ELF file.\n", __func__, name);
 731                 goto out_close;
 732         }
 733
 734         if (gelf_getehdr(elf, &ehdr) == NULL) {
 735                 pr_err("%s: cannot get elf header.\n", __func__);
 736                 goto out_elf_end;
 737         }
 738
 739         sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL);
 740         if (sec == NULL) {
 741                 sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL);
 742                 if (sec == NULL)
 743                         goto out_elf_end;
 744         }
 745
 746         syms = elf_getdata(sec, NULL);
 747         if (syms == NULL)
 748                 goto out_elf_end;
 749
 750         sec = elf_getscn(elf, shdr.sh_link);
 751         if (sec == NULL)
 752                 goto out_elf_end;
 753
 754         symstrs = elf_getdata(sec, NULL);
 755         if (symstrs == NULL)
 756                 goto out_elf_end;
 757
 758         sec_strndx = elf_getscn(elf, ehdr.e_shstrndx);
 759         if (sec_strndx == NULL)
 760                 goto out_elf_end;
 761
 762         secstrs = elf_getdata(sec_strndx, NULL);
 763         if (secstrs == NULL)
 764                 goto out_elf_end;
 765
 766         nr_syms = shdr.sh_size / shdr.sh_entsize;
 767
 768         memset(&sym, 0, sizeof(sym));
 769         if (!kernel) {
 770                 self->adjust_symbols = (ehdr.e_type == ET_EXEC ||
 771                                 elf_section_by_name(elf, &ehdr, &shdr,
 772                                                      ".gnu.prelink_undo",
 773                                                      NULL) != NULL);
 774         } else self->adjust_symbols = 0;
 775
 776         elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) {
 777                 struct symbol *f;
 778                 const char *elf_name;
 779                 char *demangled = NULL;
 780                 int is_label = elf_sym__is_label(&sym);
 781                 const char *section_name;
 782
 783                 if (!is_label && !elf_sym__is_function(&sym))
 784                         continue;
 785
 786                 sec = elf_getscn(elf, sym.st_shndx);
 787                 if (!sec)
 788                         goto out_elf_end;
 789
 790                 gelf_getshdr(sec, &shdr);
 791
 792                 if (is_label && !elf_sec__is_text(&shdr, secstrs))
 793                         continue;
 794
 795                 elf_name = elf_sym__name(&sym, symstrs);
 796                 section_name = elf_sec__name(&shdr, secstrs);
 797
 798                 if (kernel || kmodule) {
 799                         char dso_name[PATH_MAX];
 800
 801                         if (strcmp(section_name,
 802                                    curr_dso->short_name + dso_name_len) == 0)
 803                                 goto new_symbol;
 804
 805                         if (strcmp(section_name, ".text") == 0) {
 806                                 curr_map = map;
 807                                 curr_dso = self;
 808                                 goto new_symbol;
 809                         }
 810
 811                         snprintf(dso_name, sizeof(dso_name),
 812                                  "%s%s", self->short_name, section_name);
 813
 814                         curr_map = kernel_maps__find_by_dso_name(dso_name);
 815                         if (curr_map == NULL) {
 816                                 u64 start = sym.st_value;
 817
 818                                 if (kmodule)
 819                                         start += map->start + shdr.sh_offset;
 820
 821                                 curr_dso = dso__new(dso_name);
 822                                 if (curr_dso == NULL)
 823                                         goto out_elf_end;
 824                                 curr_map = map__new2(start, curr_dso);
 825                                 if (curr_map == NULL) {
 826                                         dso__delete(curr_dso);
 827                                         goto out_elf_end;
 828                                 }
 829                                 curr_map->map_ip = identity__map_ip;
 830                                 curr_map->unmap_ip = identity__map_ip;
 831                                 curr_dso->origin = DSO__ORIG_KERNEL;
 832                                 kernel_maps__insert(curr_map);
 833                                 dsos__add(curr_dso);
 834                         } else
 835                                 curr_dso = curr_map->dso;
 836
 837                         goto new_symbol;
 838                 }
 839
 840                 if (curr_dso->adjust_symbols) {
 841                         pr_debug2("adjusting symbol: st_value: %Lx sh_addr: "
 842                                   "%Lx sh_offset: %Lx\n", (u64)sym.st_value,
 843                                   (u64)shdr.sh_addr, (u64)shdr.sh_offset);
 844                         sym.st_value -= shdr.sh_addr - shdr.sh_offset;
 845                 }
 846                 /*
 847                  * We need to figure out if the object was created from C++ sources
 848                  * DWARF DW_compile_unit has this, but we don't always have access
 849                  * to it...
 850                  */
 851                 demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI);
 852                 if (demangled != NULL)
 853                         elf_name = demangled;
 854 new_symbol:
 855                 f = symbol__new(sym.st_value, sym.st_size, elf_name);
 856                 free(demangled);
 857                 if (!f)
 858                         goto out_elf_end;
 859
 860                 if (filter && filter(curr_map, f))
 861                         symbol__delete(f);
 862                 else {
 863                         dso__insert_symbol(curr_dso, f);
 864                         nr++;
 865                 }
 866         }
 867
 868         /*
 869          * For misannotated, zeroed, ASM function sizes.
 870          */
 871         if (nr > 0)
 872                 dso__fixup_sym_end(self);
 873         err = nr;
 874 out_elf_end:
 875         elf_end(elf);
 876 out_close:
 877         return err;
 878 }
 879
 880 static bool dso__build_id_equal(const struct dso *self, u8 *build_id)
 881 {
 882         return memcmp(self->build_id, build_id, sizeof(self->build_id)) == 0;
 883 }
 884
 885 bool dsos__read_build_ids(void)
 886 {
 887         bool have_build_id = false;
 888         struct dso *pos;
 889
 890         list_for_each_entry(pos, &dsos, node)
 891                 if (filename__read_build_id(pos->long_name, pos->build_id,
 892                                             sizeof(pos->build_id)) > 0) {
 893                         have_build_id     = true;
 894                         pos->has_build_id = true;
 895                 }
 896
 897         return have_build_id;
 898 }
 899
 900 /*
 901  * Align offset to 4 bytes as needed for note name and descriptor data.
 902  */
 903 #define NOTE_ALIGN(n) (((n) + 3) & -4U)
 904
 905 int filename__read_build_id(const char *filename, void *bf, size_t size)
 906 {
 907         int fd, err = -1;
 908         GElf_Ehdr ehdr;
 909         GElf_Shdr shdr;
 910         Elf_Data *data;
 911         Elf_Scn *sec;
 912         void *ptr;
 913         Elf *elf;
 914
 915         if (size < BUILD_ID_SIZE)
 916                 goto out;
 917
 918         fd = open(filename, O_RDONLY);
 919         if (fd < 0)
 920                 goto out;
 921
 922         elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
 923         if (elf == NULL) {
 924                 pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename);
 925                 goto out_close;
 926         }
 927
 928         if (gelf_getehdr(elf, &ehdr) == NULL) {
 929                 pr_err("%s: cannot get elf header.\n", __func__);
 930                 goto out_elf_end;
 931         }
 932
 933         sec = elf_section_by_name(elf, &ehdr, &shdr,
 934                                   ".note.gnu.build-id", NULL);
 935         if (sec == NULL) {
 936                 sec = elf_section_by_name(elf, &ehdr, &shdr,
 937                                           ".notes", NULL);
 938                 if (sec == NULL)
 939                         goto out_elf_end;
 940         }
 941
 942         data = elf_getdata(sec, NULL);
 943         if (data == NULL)
 944                 goto out_elf_end;
 945
 946         ptr = data->d_buf;
 947         while (ptr < (data->d_buf + data->d_size)) {
 948                 GElf_Nhdr *nhdr = ptr;
 949                 int namesz = NOTE_ALIGN(nhdr->n_namesz),
 950                     descsz = NOTE_ALIGN(nhdr->n_descsz);
 951                 const char *name;
 952
 953                 ptr += sizeof(*nhdr);
 954                 name = ptr;
 955                 ptr += namesz;
 956                 if (nhdr->n_type == NT_GNU_BUILD_ID &&
 957                     nhdr->n_namesz == sizeof("GNU")) {
 958                         if (memcmp(name, "GNU", sizeof("GNU")) == 0) {
 959                                 memcpy(bf, ptr, BUILD_ID_SIZE);
 960                                 err = BUILD_ID_SIZE;
 961                                 break;
 962                         }
 963                 }
 964                 ptr += descsz;
 965         }
 966 out_elf_end:
 967         elf_end(elf);
 968 out_close:
 969         close(fd);
 970 out:
 971         return err;
 972 }
 973
 974 int sysfs__read_build_id(const char *filename, void *build_id, size_t size)
 975 {
 976         int fd, err = -1;
 977
 978         if (size < BUILD_ID_SIZE)
 979                 goto out;
 980
 981         fd = open(filename, O_RDONLY);
 982         if (fd < 0)
 983                 goto out;
 984
 985         while (1) {
 986                 char bf[BUFSIZ];
 987                 GElf_Nhdr nhdr;
 988                 int namesz, descsz;
 989
 990                 if (read(fd, &nhdr, sizeof(nhdr)) != sizeof(nhdr))
 991                         break;
 992
 993                 namesz = NOTE_ALIGN(nhdr.n_namesz);
 994                 descsz = NOTE_ALIGN(nhdr.n_descsz);
 995                 if (nhdr.n_type == NT_GNU_BUILD_ID &&
 996                     nhdr.n_namesz == sizeof("GNU")) {
 997                         if (read(fd, bf, namesz) != namesz)
 998                                 break;
 999                         if (memcmp(bf, "GNU", sizeof("GNU")) == 0) {
1000                                 if (read(fd, build_id,
1001                                     BUILD_ID_SIZE) == BUILD_ID_SIZE) {
1002                                         err = 0;
1003                                         break;
1004                                 }
1005                         } else if (read(fd, bf, descsz) != descsz)
1006                                 break;
1007                 } else {
1008                         int n = namesz + descsz;
1009                         if (read(fd, bf, n) != n)
1010                                 break;
1011                 }
1012         }
1013         close(fd);
1014 out:
1015         return err;
1016 }
1017
1018 char dso__symtab_origin(const struct dso *self)
1019 {
1020         static const char origin[] = {
1021                 [DSO__ORIG_KERNEL] =   'k',
1022                 [DSO__ORIG_JAVA_JIT] = 'j',
1023                 [DSO__ORIG_FEDORA] =   'f',
1024                 [DSO__ORIG_UBUNTU] =   'u',
1025                 [DSO__ORIG_BUILDID] =  'b',
1026                 [DSO__ORIG_DSO] =      'd',
1027                 [DSO__ORIG_KMODULE] =  'K',
1028         };
1029
1030         if (self == NULL || self->origin == DSO__ORIG_NOT_FOUND)
1031                 return '!';
1032         return origin[self->origin];
1033 }
1034
1035 int dso__load(struct dso *self, struct map *map, symbol_filter_t filter)
1036 {
1037         int size = PATH_MAX;
1038         char *name;
1039         u8 build_id[BUILD_ID_SIZE];
1040         int ret = -1;
1041         int fd;
1042
1043         self->loaded = 1;
1044
1045         if (self->kernel)
1046                 return dso__load_kernel_sym(self, map, filter);
1047
1048         name = malloc(size);
1049         if (!name)
1050                 return -1;
1051
1052         self->adjust_symbols = 0;
1053
1054         if (strncmp(self->name, "/tmp/perf-", 10) == 0) {
1055                 ret = dso__load_perf_map(self, map, filter);
1056                 self->origin = ret > 0 ? DSO__ORIG_JAVA_JIT :
1057                                          DSO__ORIG_NOT_FOUND;
1058                 return ret;
1059         }
1060
1061         self->origin = DSO__ORIG_FEDORA - 1;
1062
1063 more:
1064         do {
1065                 self->origin++;
1066                 switch (self->origin) {
1067                 case DSO__ORIG_FEDORA:
1068                         snprintf(name, size, "/usr/lib/debug%s.debug",
1069                                  self->long_name);
1070                         break;
1071                 case DSO__ORIG_UBUNTU:
1072                         snprintf(name, size, "/usr/lib/debug%s",
1073                                  self->long_name);
1074                         break;
1075                 case DSO__ORIG_BUILDID:
1076                         if (filename__read_build_id(self->long_name, build_id,
1077                                                     sizeof(build_id))) {
1078                                 char build_id_hex[BUILD_ID_SIZE * 2 + 1];
1079
1080                                 build_id__sprintf(build_id, sizeof(build_id),
1081                                                   build_id_hex);
1082                                 snprintf(name, size,
1083                                          "/usr/lib/debug/.build-id/%.2s/%s.debug",
1084                                         build_id_hex, build_id_hex + 2);
1085                                 if (self->has_build_id)
1086                                         goto compare_build_id;
1087                                 break;
1088                         }
1089                         self->origin++;
1090                         /* Fall thru */
1091                 case DSO__ORIG_DSO:
1092                         snprintf(name, size, "%s", self->long_name);
1093                         break;
1094
1095                 default:
1096                         goto out;
1097                 }
1098
1099                 if (self->has_build_id) {
1100                         if (filename__read_build_id(name, build_id,
1101                                                     sizeof(build_id)) < 0)
1102                                 goto more;
1103 compare_build_id:
1104                         if (!dso__build_id_equal(self, build_id))
1105                                 goto more;
1106                 }
1107
1108                 fd = open(name, O_RDONLY);
1109         } while (fd < 0);
1110
1111         ret = dso__load_sym(self, map, name, fd, filter, 0, 0);
1112         close(fd);
1113
1114         /*
1115          * Some people seem to have debuginfo files _WITHOUT_ debug info!?!?
1116          */
1117         if (!ret)
1118                 goto more;
1119
1120         if (ret > 0) {
1121                 int nr_plt = dso__synthesize_plt_symbols(self, map, filter);
1122                 if (nr_plt > 0)
1123                         ret += nr_plt;
1124         }
1125 out:
1126         free(name);
1127         if (ret < 0 && strstr(self->name, " (deleted)") != NULL)
1128                 return 0;
1129         return ret;
1130 }
1131
1132 struct map *kernel_map;
1133
1134 static void kernel_maps__insert(struct map *map)
1135 {
1136         maps__insert(&kernel_maps, map);
1137 }
1138
1139 struct symbol *kernel_maps__find_symbol(u64 ip, struct map **mapp,
1140                                         symbol_filter_t filter)
1141 {
1142         struct map *map = maps__find(&kernel_maps, ip);
1143
1144         if (mapp)
1145                 *mapp = map;
1146
1147         if (map) {
1148                 ip = map->map_ip(map, ip);
1149                 return map__find_symbol(map, ip, filter);
1150         }
1151
1152         return NULL;
1153 }
1154
1155 struct map *kernel_maps__find_by_dso_name(const char *name)
1156 {
1157         struct rb_node *nd;
1158
1159         for (nd = rb_first(&kernel_maps); nd; nd = rb_next(nd)) {
1160                 struct map *map = rb_entry(nd, struct map, rb_node);
1161
1162                 if (map->dso && strcmp(map->dso->name, name) == 0)
1163                         return map;
1164         }
1165
1166         return NULL;
1167 }
1168
1169 static int dsos__set_modules_path_dir(char *dirname)
1170 {
1171         struct dirent *dent;
1172         DIR *dir = opendir(dirname);
1173
1174         if (!dir) {
1175                 pr_err("%s: cannot open %s dir\n", __func__, dirname);
1176                 return -1;
1177         }
1178
1179         while ((dent = readdir(dir)) != NULL) {
1180                 char path[PATH_MAX];
1181
1182                 if (dent->d_type == DT_DIR) {
1183                         if (!strcmp(dent->d_name, ".") ||
1184                             !strcmp(dent->d_name, ".."))
1185                                 continue;
1186
1187                         snprintf(path, sizeof(path), "%s/%s",
1188                                  dirname, dent->d_name);
1189                         if (dsos__set_modules_path_dir(path) < 0)
1190                                 goto failure;
1191                 } else {
1192                         char *dot = strrchr(dent->d_name, '.'),
1193                              dso_name[PATH_MAX];
1194                         struct map *map;
1195                         char *long_name;
1196
1197                         if (dot == NULL || strcmp(dot, ".ko"))
1198                                 continue;
1199                         snprintf(dso_name, sizeof(dso_name), "[%.*s]",
1200                                  (int)(dot - dent->d_name), dent->d_name);
1201
1202                         strxfrchar(dso_name, '-', '_');
1203                         map = kernel_maps__find_by_dso_name(dso_name);
1204                         if (map == NULL)
1205                                 continue;
1206
1207                         snprintf(path, sizeof(path), "%s/%s",
1208                                  dirname, dent->d_name);
1209
1210                         long_name = strdup(path);
1211                         if (long_name == NULL)
1212                                 goto failure;
1213                         dso__set_long_name(map->dso, long_name);
1214                 }
1215         }
1216
1217         return 0;
1218 failure:
1219         closedir(dir);
1220         return -1;
1221 }
1222
1223 static int dsos__set_modules_path(void)
1224 {
1225         struct utsname uts;
1226         char modules_path[PATH_MAX];
1227
1228         if (uname(&uts) < 0)
1229                 return -1;
1230
1231         snprintf(modules_path, sizeof(modules_path), "/lib/modules/%s/kernel",
1232                  uts.release);
1233
1234         return dsos__set_modules_path_dir(modules_path);
1235 }
1236
1237 /*
1238  * Constructor variant for modules (where we know from /proc/modules where
1239  * they are loaded) and for vmlinux, where only after we load all the
1240  * symbols we'll know where it starts and ends.
1241  */
1242 static struct map *map__new2(u64 start, struct dso *dso)
1243 {
1244         struct map *self = malloc(sizeof(*self));
1245
1246         if (self != NULL) {
1247                 /*
1248                  * ->end will be filled after we load all the symbols
1249                  */
1250                 map__init(self, start, 0, 0, dso);
1251         }
1252
1253         return self;
1254 }
1255
1256 static int kernel_maps__create_module_maps(void)
1257 {
1258         char *line = NULL;
1259         size_t n;
1260         FILE *file = fopen("/proc/modules", "r");
1261         struct map *map;
1262
1263         if (file == NULL)
1264                 return -1;
1265
1266         while (!feof(file)) {
1267                 char name[PATH_MAX];
1268                 u64 start;
1269                 struct dso *dso;
1270                 char *sep;
1271                 int line_len;
1272
1273                 line_len = getline(&line, &n, file);
1274                 if (line_len < 0)
1275                         break;
1276
1277                 if (!line)
1278                         goto out_failure;
1279
1280                 line[--line_len] = '\0'; /* \n */
1281
1282                 sep = strrchr(line, 'x');
1283                 if (sep == NULL)
1284                         continue;
1285
1286                 hex2u64(sep + 1, &start);
1287
1288                 sep = strchr(line, ' ');
1289                 if (sep == NULL)
1290                         continue;
1291
1292                 *sep = '\0';
1293
1294                 snprintf(name, sizeof(name), "[%s]", line);
1295                 dso = dso__new(name);
1296
1297                 if (dso == NULL)
1298                         goto out_delete_line;
1299
1300                 map = map__new2(start, dso);
1301                 if (map == NULL) {
1302                         dso__delete(dso);
1303                         goto out_delete_line;
1304                 }
1305
1306                 snprintf(name, sizeof(name),
1307                          "/sys/module/%s/notes/.note.gnu.build-id", line);
1308                 if (sysfs__read_build_id(name, dso->build_id,
1309                                          sizeof(dso->build_id)) == 0)
1310                         dso->has_build_id = true;
1311
1312                 dso->origin = DSO__ORIG_KMODULE;
1313                 kernel_maps__insert(map);
1314                 dsos__add(dso);
1315         }
1316
1317         free(line);
1318         fclose(file);
1319
1320         /*
1321          * Now that we have all sorted out, just set the ->end of all
1322          * maps:
1323          */
1324         kernel_maps__fixup_end();
1325
1326         return dsos__set_modules_path();
1327
1328 out_delete_line:
1329         free(line);
1330 out_failure:
1331         return -1;
1332 }
1333
1334 static int dso__load_vmlinux(struct dso *self, struct map *map,
1335                              const char *vmlinux, symbol_filter_t filter)
1336 {
1337         int err, fd = open(vmlinux, O_RDONLY);
1338
1339         self->loaded = 1;
1340
1341         if (fd < 0)
1342                 return -1;
1343
1344         err = dso__load_sym(self, map, self->long_name, fd, filter, 1, 0);
1345
1346         close(fd);
1347
1348         return err;
1349 }
1350
1351 static int dso__load_kernel_sym(struct dso *self, struct map *map,
1352                                 symbol_filter_t filter)
1353 {
1354         int err = dso__load_vmlinux(self, map, self->name, filter);
1355
1356         if (err <= 0)
1357                 err = kernel_maps__load_kallsyms(filter);
1358
1359         if (err > 0) {
1360                 map__fixup_start(map);
1361                 map__fixup_end(map);
1362         }
1363
1364         return err;
1365 }
1366
1367 LIST_HEAD(dsos);
1368 struct dso      *vdso;
1369
1370 const char      *vmlinux_name = "vmlinux";
1371
1372 static void dsos__add(struct dso *dso)
1373 {
1374         list_add_tail(&dso->node, &dsos);
1375 }
1376
1377 static struct dso *dsos__find(const char *name)
1378 {
1379         struct dso *pos;
1380
1381         list_for_each_entry(pos, &dsos, node)
1382                 if (strcmp(pos->name, name) == 0)
1383                         return pos;
1384         return NULL;
1385 }
1386
1387 struct dso *dsos__findnew(const char *name)
1388 {
1389         struct dso *dso = dsos__find(name);
1390
1391         if (!dso) {
1392                 dso = dso__new(name);
1393                 if (dso != NULL) {
1394                         dsos__add(dso);
1395                         dso__set_basename(dso);
1396                 }
1397         }
1398
1399         return dso;
1400 }
1401
1402 void dsos__fprintf(FILE *fp)
1403 {
1404         struct dso *pos;
1405
1406         list_for_each_entry(pos, &dsos, node)
1407                 dso__fprintf(pos, fp);
1408 }
1409
1410 size_t dsos__fprintf_buildid(FILE *fp)
1411 {
1412         struct dso *pos;
1413         size_t ret = 0;
1414
1415         list_for_each_entry(pos, &dsos, node) {
1416                 ret += dso__fprintf_buildid(pos, fp);
1417                 ret += fprintf(fp, " %s\n", pos->long_name);
1418         }
1419         return ret;
1420 }
1421
1422 static int kernel_maps__create_kernel_map(void)
1423 {
1424         struct dso *kernel = dso__new(vmlinux_name);
1425
1426         if (kernel == NULL)
1427                 return -1;
1428
1429         kernel_map = map__new2(0, kernel);
1430         if (kernel_map == NULL)
1431                 goto out_delete_kernel_dso;
1432
1433         kernel_map->map_ip = kernel_map->unmap_ip = identity__map_ip;
1434
1435         kernel->short_name = "[kernel]";
1436         kernel->kernel = 1;
1437         vdso = dso__new("[vdso]");
1438         if (vdso == NULL)
1439                 goto out_delete_kernel_map;
1440
1441         if (sysfs__read_build_id("/sys/kernel/notes", kernel->build_id,
1442                                  sizeof(kernel->build_id)) == 0)
1443                 kernel->has_build_id = true;
1444
1445         kernel_maps__insert(kernel_map);
1446         dsos__add(kernel);
1447         dsos__add(vdso);
1448
1449         return 0;
1450
1451 out_delete_kernel_map:
1452         map__delete(kernel_map);
1453         kernel_map = NULL;
1454 out_delete_kernel_dso:
1455         dso__delete(kernel);
1456         return -1;
1457 }
1458
1459 int kernel_maps__init(bool use_modules)
1460 {
1461         if (kernel_maps__create_kernel_map() < 0)
1462                 return -1;
1463
1464         if (use_modules && kernel_maps__create_module_maps() < 0)
1465                 pr_warning("Failed to load list of modules in use, "
1466                            "continuing...\n");
1467
1468         return 0;
1469 }
1470
1471 void symbol__init(unsigned int priv_size)
1472 {
1473         elf_version(EV_CURRENT);
1474         symbol__priv_size = priv_size;
1475 }