nm.c revision 57bd66cabf6e6b9ecf622cdbf350804897a8df58
1/* Print symbol information from ELF file in human-readable form. 2 Copyright (C) 2000-2008, 2009, 2011, 2012 Red Hat, Inc. 3 This file is part of elfutils. 4 Written by Ulrich Drepper <drepper@redhat.com>, 2000. 5 6 This file is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3 of the License, or 9 (at your option) any later version. 10 11 elfutils is distributed in the hope that it will be useful, but 12 WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 18 19#ifdef HAVE_CONFIG_H 20# include <config.h> 21#endif 22 23#include <ar.h> 24#include <argp.h> 25#include <assert.h> 26#include <ctype.h> 27#include <dwarf.h> 28#include <errno.h> 29#include <error.h> 30#include <fcntl.h> 31#include <gelf.h> 32#include <inttypes.h> 33#include <libdw.h> 34#include <libintl.h> 35#include <locale.h> 36#include <mcheck.h> 37#include <obstack.h> 38#include <search.h> 39#include <stdbool.h> 40#include <stdio.h> 41#include <stdio_ext.h> 42#include <stdlib.h> 43#include <string.h> 44#include <unistd.h> 45#include <sys/param.h> 46 47#include <system.h> 48#include "../libebl/libeblP.h" 49 50 51/* Name and version of program. */ 52static void print_version (FILE *stream, struct argp_state *state); 53ARGP_PROGRAM_VERSION_HOOK_DEF = print_version; 54 55/* Bug report address. */ 56ARGP_PROGRAM_BUG_ADDRESS_DEF = PACKAGE_BUGREPORT; 57 58 59/* Values for the parameters which have no short form. */ 60#define OPT_DEFINED 0x100 61#define OPT_MARK_SPECIAL 0x101 62 63/* Definitions of arguments for argp functions. */ 64static const struct argp_option options[] = 65{ 66 { NULL, 0, NULL, 0, N_("Output selection:"), 0 }, 67 { "debug-syms", 'a', NULL, 0, N_("Display debugger-only symbols"), 0 }, 68 { "defined-only", OPT_DEFINED, NULL, 0, N_("Display only defined symbols"), 69 0 }, 70 { "dynamic", 'D', NULL, 0, 71 N_("Display dynamic symbols instead of normal symbols"), 0 }, 72 { "extern-only", 'g', NULL, 0, N_("Display only external symbols"), 0 }, 73 { "undefined-only", 'u', NULL, 0, N_("Display only undefined symbols"), 0 }, 74 { "print-armap", 's', NULL, 0, 75 N_("Include index for symbols from archive members"), 0 }, 76 77 { NULL, 0, NULL, 0, N_("Output format:"), 0 }, 78 { "print-file-name", 'A', NULL, 0, 79 N_("Print name of the input file before every symbol"), 0 }, 80 { NULL, 'o', NULL, OPTION_HIDDEN, "Same as -A", 0 }, 81 { "format", 'f', "FORMAT", 0, 82 N_("Use the output format FORMAT. FORMAT can be `bsd', `sysv' or `posix'. The default is `sysv'"), 83 0 }, 84 { NULL, 'B', NULL, 0, N_("Same as --format=bsd"), 0 }, 85 { "portability", 'P', NULL, 0, N_("Same as --format=posix"), 0 }, 86 { "radix", 't', "RADIX", 0, N_("Use RADIX for printing symbol values"), 0 }, 87 { "mark-special", OPT_MARK_SPECIAL, NULL, 0, N_("Mark special symbols"), 0 }, 88 { "mark-weak", OPT_MARK_SPECIAL, NULL, OPTION_HIDDEN, "", 0 }, 89 { "print-size", 'S', NULL, 0, N_("Print size of defined symbols"), 0 }, 90 91 { NULL, 0, NULL, 0, N_("Output options:"), 0 }, 92 { "numeric-sort", 'n', NULL, 0, N_("Sort symbols numerically by address"), 93 0 }, 94 { "no-sort", 'p', NULL, 0, N_("Do not sort the symbols"), 0 }, 95 { "reverse-sort", 'r', NULL, 0, N_("Reverse the sense of the sort"), 0 }, 96#ifdef USE_DEMANGLE 97 { "demangle", 'C', NULL, 0, 98 N_("Decode low-level symbol names into source code names"), 0 }, 99#endif 100 { NULL, 0, NULL, 0, N_("Miscellaneous:"), 0 }, 101 { NULL, 0, NULL, 0, NULL, 0 } 102}; 103 104/* Short description of program. */ 105static const char doc[] = N_("List symbols from FILEs (a.out by default)."); 106 107/* Strings for arguments in help texts. */ 108static const char args_doc[] = N_("[FILE...]"); 109 110/* Prototype for option handler. */ 111static error_t parse_opt (int key, char *arg, struct argp_state *state); 112 113/* Parser children. */ 114static struct argp_child argp_children[] = 115 { 116 { &color_argp, 0, N_("Output formatting"), 2 }, 117 { NULL, 0, NULL, 0} 118 }; 119 120/* Data structure to communicate with argp functions. */ 121static struct argp argp = 122{ 123 options, parse_opt, args_doc, doc, argp_children, NULL, NULL 124}; 125 126 127/* Print symbols in file named FNAME. */ 128static int process_file (const char *fname, bool more_than_one); 129 130/* Handle content of archive. */ 131static int handle_ar (int fd, Elf *elf, const char *prefix, const char *fname, 132 const char *suffix); 133 134/* Handle ELF file. */ 135static int handle_elf (Elf *elf, const char *prefix, const char *fname, 136 const char *suffix); 137 138 139#define INTERNAL_ERROR(fname) \ 140 error (EXIT_FAILURE, 0, gettext ("%s: INTERNAL ERROR %d (%s-%s): %s"), \ 141 fname, __LINE__, PACKAGE_VERSION, __DATE__, elf_errmsg (-1)) 142 143 144/* Internal representation of symbols. */ 145typedef struct GElf_SymX 146{ 147 GElf_Sym sym; 148 Elf32_Word xndx; 149 char *where; 150} GElf_SymX; 151 152 153/* User-selectable options. */ 154 155/* The selected output format. */ 156static enum 157{ 158 format_sysv = 0, 159 format_bsd, 160 format_posix 161} format; 162 163/* Print defined, undefined, or both? */ 164static bool hide_undefined; 165static bool hide_defined; 166 167/* Print local symbols also? */ 168static bool hide_local; 169 170/* Nonzero if full filename should precede every symbol. */ 171static bool print_file_name; 172 173/* If true print size of defined symbols in BSD format. */ 174static bool print_size; 175 176/* If true print archive index. */ 177static bool print_armap; 178 179/* If true reverse sorting. */ 180static bool reverse_sort; 181 182#ifdef USE_DEMANGLE 183/* If true demangle symbols. */ 184static bool demangle; 185#endif 186 187/* Type of the section we are printing. */ 188static GElf_Word symsec_type = SHT_SYMTAB; 189 190/* Sorting selection. */ 191static enum 192{ 193 sort_name = 0, 194 sort_numeric, 195 sort_nosort 196} sort; 197 198/* Radix for printed numbers. */ 199static enum 200{ 201 radix_hex = 0, 202 radix_decimal, 203 radix_octal 204} radix; 205 206/* If nonzero mark special symbols: 207 - weak symbols are distinguished from global symbols by adding 208 a `*' after the identifying letter for the symbol class and type. 209 - TLS symbols are distinguished from normal symbols by adding 210 a '@' after the identifying letter for the symbol class and type. */ 211static bool mark_special; 212 213 214int 215main (int argc, char *argv[]) 216{ 217 int remaining; 218 int result = 0; 219 220 /* Make memory leak detection possible. */ 221 mtrace (); 222 223 /* We use no threads here which can interfere with handling a stream. */ 224 (void) __fsetlocking (stdin, FSETLOCKING_BYCALLER); 225 (void) __fsetlocking (stdout, FSETLOCKING_BYCALLER); 226 (void) __fsetlocking (stderr, FSETLOCKING_BYCALLER); 227 228 /* Set locale. */ 229 (void) setlocale (LC_ALL, ""); 230 231 /* Make sure the message catalog can be found. */ 232 (void) bindtextdomain (PACKAGE_TARNAME, LOCALEDIR); 233 234 /* Initialize the message catalog. */ 235 (void) textdomain (PACKAGE_TARNAME); 236 237 /* Parse and process arguments. */ 238 (void) argp_parse (&argp, argc, argv, 0, &remaining, NULL); 239 240 /* Tell the library which version we are expecting. */ 241 (void) elf_version (EV_CURRENT); 242 243 if (remaining == argc) 244 /* The user didn't specify a name so we use a.out. */ 245 result = process_file ("a.out", false); 246 else 247 { 248 /* Process all the remaining files. */ 249 const bool more_than_one = remaining + 1 < argc; 250 251 do 252 result |= process_file (argv[remaining], more_than_one); 253 while (++remaining < argc); 254 } 255 256 return result; 257} 258 259 260/* Print the version information. */ 261static void 262print_version (FILE *stream, struct argp_state *state __attribute__ ((unused))) 263{ 264 fprintf (stream, "nm (%s) %s\n", PACKAGE_NAME, PACKAGE_VERSION); 265 fprintf (stream, gettext ("\ 266Copyright (C) %s Red Hat, Inc.\n\ 267This is free software; see the source for copying conditions. There is NO\n\ 268warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\ 269"), "2012"); 270 fprintf (stream, gettext ("Written by %s.\n"), "Ulrich Drepper"); 271} 272 273 274/* Handle program arguments. */ 275static error_t 276parse_opt (int key, char *arg, 277 struct argp_state *state __attribute__ ((unused))) 278{ 279 switch (key) 280 { 281 case 'a': 282 /* XXX */ 283 break; 284 285#ifdef USE_DEMANGLE 286 case 'C': 287 demangle = true; 288 break; 289#endif 290 291 case 'f': 292 if (strcmp (arg, "bsd") == 0) 293 format = format_bsd; 294 else if (strcmp (arg, "posix") == 0) 295 format = format_posix; 296 else 297 /* Be bug compatible. The BFD implementation also defaulted to 298 using the SysV format if nothing else matches. */ 299 format = format_sysv; 300 break; 301 302 case 'g': 303 hide_local = true; 304 break; 305 306 case 'n': 307 sort = sort_numeric; 308 break; 309 310 case 'p': 311 sort = sort_nosort; 312 break; 313 314 case 't': 315 if (strcmp (arg, "10") == 0 || strcmp (arg, "d") == 0) 316 radix = radix_decimal; 317 else if (strcmp (arg, "8") == 0 || strcmp (arg, "o") == 0) 318 radix = radix_octal; 319 else 320 radix = radix_hex; 321 break; 322 323 case 'u': 324 hide_undefined = false; 325 hide_defined = true; 326 break; 327 328 case 'A': 329 case 'o': 330 print_file_name = true; 331 break; 332 333 case 'B': 334 format = format_bsd; 335 break; 336 337 case 'D': 338 symsec_type = SHT_DYNSYM; 339 break; 340 341 case 'P': 342 format = format_posix; 343 break; 344 345 case OPT_DEFINED: 346 hide_undefined = true; 347 hide_defined = false; 348 break; 349 350 case OPT_MARK_SPECIAL: 351 mark_special = true; 352 break; 353 354 case 'S': 355 print_size = true; 356 break; 357 358 case 's': 359 print_armap = true; 360 break; 361 362 case 'r': 363 reverse_sort = true; 364 break; 365 366 default: 367 return ARGP_ERR_UNKNOWN; 368 } 369 return 0; 370} 371 372 373/* Open the file and determine the type. */ 374static int 375process_file (const char *fname, bool more_than_one) 376{ 377 /* Open the file. */ 378 int fd = open (fname, O_RDONLY); 379 if (fd == -1) 380 { 381 error (0, errno, gettext ("cannot open '%s'"), fname); 382 return 1; 383 } 384 385 /* Now get the ELF descriptor. */ 386 Elf *elf = elf_begin (fd, ELF_C_READ_MMAP, NULL); 387 if (elf != NULL) 388 { 389 if (elf_kind (elf) == ELF_K_ELF) 390 { 391 int result = handle_elf (elf, more_than_one ? "" : NULL, 392 fname, NULL); 393 394 if (elf_end (elf) != 0) 395 INTERNAL_ERROR (fname); 396 397 if (close (fd) != 0) 398 error (EXIT_FAILURE, errno, gettext ("while closing '%s'"), fname); 399 400 return result; 401 } 402 else if (elf_kind (elf) == ELF_K_AR) 403 { 404 int result = handle_ar (fd, elf, NULL, fname, NULL); 405 406 if (elf_end (elf) != 0) 407 INTERNAL_ERROR (fname); 408 409 if (close (fd) != 0) 410 error (EXIT_FAILURE, errno, gettext ("while closing '%s'"), fname); 411 412 return result; 413 } 414 415 /* We cannot handle this type. Close the descriptor anyway. */ 416 if (elf_end (elf) != 0) 417 INTERNAL_ERROR (fname); 418 } 419 420 error (0, 0, gettext ("%s: File format not recognized"), fname); 421 422 return 1; 423} 424 425 426static int 427handle_ar (int fd, Elf *elf, const char *prefix, const char *fname, 428 const char *suffix) 429{ 430 size_t fname_len = strlen (fname) + 1; 431 size_t prefix_len = prefix != NULL ? strlen (prefix) : 0; 432 char new_prefix[prefix_len + fname_len + 2]; 433 size_t suffix_len = suffix != NULL ? strlen (suffix) : 0; 434 char new_suffix[suffix_len + 2]; 435 Elf *subelf; 436 Elf_Cmd cmd = ELF_C_READ_MMAP; 437 int result = 0; 438 439 char *cp = new_prefix; 440 if (prefix != NULL) 441 cp = stpcpy (cp, prefix); 442 cp = stpcpy (cp, fname); 443 stpcpy (cp, "["); 444 445 cp = new_suffix; 446 if (suffix != NULL) 447 cp = stpcpy (cp, suffix); 448 stpcpy (cp, "]"); 449 450 /* First print the archive index if this is wanted. */ 451 if (print_armap) 452 { 453 Elf_Arsym *arsym = elf_getarsym (elf, NULL); 454 455 if (arsym != NULL) 456 { 457 Elf_Arhdr *arhdr = NULL; 458 size_t arhdr_off = 0; /* Note: 0 is no valid offset. */ 459 460 fputs_unlocked (gettext("\nArchive index:\n"), stdout); 461 462 while (arsym->as_off != 0) 463 { 464 if (arhdr_off != arsym->as_off 465 && (elf_rand (elf, arsym->as_off) != arsym->as_off 466 || (subelf = elf_begin (fd, cmd, elf)) == NULL 467 || (arhdr = elf_getarhdr (subelf)) == NULL)) 468 { 469 error (0, 0, gettext ("invalid offset %zu for symbol %s"), 470 arsym->as_off, arsym->as_name); 471 continue; 472 } 473 474 printf (gettext ("%s in %s\n"), arsym->as_name, arhdr->ar_name); 475 476 ++arsym; 477 } 478 479 if (elf_rand (elf, SARMAG) != SARMAG) 480 { 481 error (0, 0, 482 gettext ("cannot reset archive offset to beginning")); 483 return 1; 484 } 485 } 486 } 487 488 /* Process all the files contained in the archive. */ 489 while ((subelf = elf_begin (fd, cmd, elf)) != NULL) 490 { 491 /* The the header for this element. */ 492 Elf_Arhdr *arhdr = elf_getarhdr (subelf); 493 494 /* Skip over the index entries. */ 495 if (strcmp (arhdr->ar_name, "/") != 0 496 && strcmp (arhdr->ar_name, "//") != 0) 497 { 498 if (elf_kind (subelf) == ELF_K_ELF) 499 result |= handle_elf (subelf, new_prefix, arhdr->ar_name, 500 new_suffix); 501 else if (elf_kind (subelf) == ELF_K_AR) 502 result |= handle_ar (fd, subelf, new_prefix, arhdr->ar_name, 503 new_suffix); 504 else 505 { 506 error (0, 0, gettext ("%s%s%s: file format not recognized"), 507 new_prefix, arhdr->ar_name, new_suffix); 508 result = 1; 509 } 510 } 511 512 /* Get next archive element. */ 513 cmd = elf_next (subelf); 514 if (elf_end (subelf) != 0) 515 INTERNAL_ERROR (fname); 516 } 517 518 return result; 519} 520 521 522/* Mapping of radix and binary class to length. */ 523static const int length_map[2][3] = 524{ 525 [ELFCLASS32 - 1] = 526 { 527 [radix_hex] = 8, 528 [radix_decimal] = 10, 529 [radix_octal] = 11 530 }, 531 [ELFCLASS64 - 1] = 532 { 533 [radix_hex] = 16, 534 [radix_decimal] = 20, 535 [radix_octal] = 22 536 } 537}; 538 539 540static int 541global_compare (const void *p1, const void *p2) 542{ 543 const Dwarf_Global *g1 = (const Dwarf_Global *) p1; 544 const Dwarf_Global *g2 = (const Dwarf_Global *) p2; 545 546 return strcmp (g1->name, g2->name); 547} 548 549 550static void *global_root; 551 552 553static int 554get_global (Dwarf *dbg __attribute__ ((unused)), Dwarf_Global *global, 555 void *arg __attribute__ ((unused))) 556{ 557 tsearch (memcpy (xmalloc (sizeof (Dwarf_Global)), global, 558 sizeof (Dwarf_Global)), 559 &global_root, global_compare); 560 561 return DWARF_CB_OK; 562} 563 564 565struct local_name 566{ 567 const char *name; 568 const char *file; 569 Dwarf_Word lineno; 570 Dwarf_Addr lowpc; 571 Dwarf_Addr highpc; 572}; 573 574 575static int 576local_compare (const void *p1, const void *p2) 577{ 578 struct local_name *g1 = (struct local_name *) p1; 579 struct local_name *g2 = (struct local_name *) p2; 580 int result; 581 582 result = strcmp (g1->name, g2->name); 583 if (result == 0) 584 { 585 if (g1->lowpc <= g2->lowpc && g1->highpc >= g2->highpc) 586 { 587 /* g2 is contained in g1. Update the data. */ 588 g2->lowpc = g1->lowpc; 589 g2->highpc = g1->highpc; 590 result = 0; 591 } 592 else if (g2->lowpc <= g1->lowpc && g2->highpc >= g1->highpc) 593 { 594 /* g1 is contained in g2. Update the data. */ 595 g1->lowpc = g2->lowpc; 596 g1->highpc = g2->highpc; 597 result = 0; 598 } 599 else 600 result = g1->lowpc < g2->lowpc ? -1 : 1; 601 } 602 603 return result; 604} 605 606 607static int 608get_var_range (Dwarf_Die *die, Dwarf_Word *lowpc, Dwarf_Word *highpc) 609{ 610 Dwarf_Attribute locattr_mem; 611 Dwarf_Attribute *locattr = dwarf_attr (die, DW_AT_location, &locattr_mem); 612 if (locattr == NULL) 613 return 1; 614 615 Dwarf_Op *loc; 616 size_t nloc; 617 if (dwarf_getlocation (locattr, &loc, &nloc) != 0) 618 return 1; 619 620 /* Interpret the location expressions. */ 621 // XXX For now just the simple one: 622 if (nloc == 1 && loc[0].atom == DW_OP_addr) 623 { 624 *lowpc = *highpc = loc[0].number; 625 return 0; 626 } 627 628 return 1; 629} 630 631 632 633static void *local_root; 634 635 636static void 637get_local_names (Dwarf *dbg) 638{ 639 Dwarf_Off offset = 0; 640 Dwarf_Off old_offset; 641 size_t hsize; 642 643 while (dwarf_nextcu (dbg, old_offset = offset, &offset, &hsize, NULL, NULL, 644 NULL) == 0) 645 { 646 Dwarf_Die cudie_mem; 647 Dwarf_Die *cudie = dwarf_offdie (dbg, old_offset + hsize, &cudie_mem); 648 649 /* If we cannot get the CU DIE there is no need to go on with 650 this CU. */ 651 if (cudie == NULL) 652 continue; 653 /* This better be a CU DIE. */ 654 if (dwarf_tag (cudie) != DW_TAG_compile_unit) 655 continue; 656 657 /* Get the line information. */ 658 Dwarf_Files *files; 659 size_t nfiles; 660 if (dwarf_getsrcfiles (cudie, &files, &nfiles) != 0) 661 continue; 662 663 Dwarf_Die die_mem; 664 Dwarf_Die *die = &die_mem; 665 if (dwarf_child (cudie, die) == 0) 666 /* Iterate over all immediate children of the CU DIE. */ 667 do 668 { 669 int tag = dwarf_tag (die); 670 if (tag != DW_TAG_subprogram && tag != DW_TAG_variable) 671 continue; 672 673 /* We are interested in five attributes: name, decl_file, 674 decl_line, low_pc, and high_pc. */ 675 Dwarf_Attribute attr_mem; 676 Dwarf_Attribute *attr = dwarf_attr (die, DW_AT_name, &attr_mem); 677 const char *name = dwarf_formstring (attr); 678 if (name == NULL) 679 continue; 680 681 Dwarf_Word fileidx; 682 attr = dwarf_attr (die, DW_AT_decl_file, &attr_mem); 683 if (dwarf_formudata (attr, &fileidx) != 0 || fileidx >= nfiles) 684 continue; 685 686 Dwarf_Word lineno; 687 attr = dwarf_attr (die, DW_AT_decl_line, &attr_mem); 688 if (dwarf_formudata (attr, &lineno) != 0 || lineno == 0) 689 continue; 690 691 Dwarf_Addr lowpc; 692 Dwarf_Addr highpc; 693 if (tag == DW_TAG_subprogram) 694 { 695 if (dwarf_lowpc (die, &lowpc) != 0 696 || dwarf_highpc (die, &highpc) != 0) 697 continue; 698 } 699 else 700 { 701 if (get_var_range (die, &lowpc, &highpc) != 0) 702 continue; 703 } 704 705 /* We have all the information. Create a record. */ 706 struct local_name *newp 707 = (struct local_name *) xmalloc (sizeof (*newp)); 708 newp->name = name; 709 newp->file = dwarf_filesrc (files, fileidx, NULL, NULL); 710 newp->lineno = lineno; 711 newp->lowpc = lowpc; 712 newp->highpc = highpc; 713 714 /* Since we cannot deallocate individual memory we do not test 715 for duplicates in the tree. This should not happen anyway. */ 716 if (tsearch (newp, &local_root, local_compare) == NULL) 717 error (EXIT_FAILURE, errno, 718 gettext ("cannot create search tree")); 719 } 720 while (dwarf_siblingof (die, die) == 0); 721 } 722} 723 724/* Do elf_strptr, but return a backup string and never NULL. */ 725static const char * 726sym_name (Elf *elf, GElf_Word strndx, GElf_Word st_name, char buf[], size_t n) 727{ 728 const char *symstr = elf_strptr (elf, strndx, st_name); 729 if (symstr == NULL) 730 { 731 snprintf (buf, n, "[invalid st_name %#" PRIx32 "]", st_name); 732 symstr = buf; 733 } 734 return symstr; 735} 736 737/* Show symbols in SysV format. */ 738static void 739show_symbols_sysv (Ebl *ebl, GElf_Word strndx, const char *fullname, 740 GElf_SymX *syms, size_t nsyms, int longest_name, 741 int longest_where) 742{ 743 size_t shnum; 744 if (elf_getshdrnum (ebl->elf, &shnum) < 0) 745 INTERNAL_ERROR (fullname); 746 747 bool scnnames_malloced = shnum * sizeof (const char *) > 128 * 1024; 748 const char **scnnames; 749 if (scnnames_malloced) 750 scnnames = (const char **) xmalloc (sizeof (const char *) * shnum); 751 else 752 scnnames = (const char **) alloca (sizeof (const char *) * shnum); 753 /* Get the section header string table index. */ 754 size_t shstrndx; 755 if (elf_getshdrstrndx (ebl->elf, &shstrndx) < 0) 756 error (EXIT_FAILURE, 0, 757 gettext ("cannot get section header string table index")); 758 759 /* Cache the section names. */ 760 Elf_Scn *scn = NULL; 761 size_t cnt = 1; 762 while ((scn = elf_nextscn (ebl->elf, scn)) != NULL) 763 { 764 GElf_Shdr shdr_mem; 765 766 assert (elf_ndxscn (scn) == cnt++); 767 768 char *name = elf_strptr (ebl->elf, shstrndx, 769 gelf_getshdr (scn, &shdr_mem)->sh_name); 770 if (unlikely (name == NULL)) 771 { 772 const size_t bufsz = sizeof "[invalid sh_name 0x12345678]" 773 name = alloca (bufsz); 774 snprintf (name, bufsz, "[invalid sh_name %#" PRIx32 "]", 775 gelf_getshdr (scn, &shdr_mem)->sh_name); 776 } 777 scnnames[elf_ndxscn (scn)] = name; 778 } 779 780 int digits = length_map[gelf_getclass (ebl->elf) - 1][radix]; 781 782 /* We always print this prolog. */ 783 printf (gettext ("\n\nSymbols from %s:\n\n"), fullname); 784 785 /* The header line. */ 786 printf (gettext ("%*s%-*s %-*s Class Type %-*s %*s Section\n\n"), 787 print_file_name ? (int) strlen (fullname) + 1: 0, "", 788 longest_name, sgettext ("sysv|Name"), 789 /* TRANS: the "sysv|" parts makes the string unique. */ 790 digits, sgettext ("sysv|Value"), 791 /* TRANS: the "sysv|" parts makes the string unique. */ 792 digits, sgettext ("sysv|Size"), 793 /* TRANS: the "sysv|" parts makes the string unique. */ 794 longest_where, sgettext ("sysv|Line")); 795 796 /* Which format string to use (different radix for numbers). */ 797 const char *number_fmtstr; 798 if (radix == radix_hex) 799 number_fmtstr = "%0*" PRIx64; 800 else if (radix == radix_decimal) 801 number_fmtstr = "%0*" PRId64; 802 else 803 number_fmtstr = "%0*" PRIo64; 804 805#ifdef USE_DEMANGLE 806 size_t demangle_buffer_len = 0; 807 char *demangle_buffer = NULL; 808#endif 809 810 /* Iterate over all symbols. */ 811 for (cnt = 1; cnt < nsyms; ++cnt) 812 { 813 /* In this format SECTION entries are not printed. */ 814 if (GELF_ST_TYPE (syms[cnt].sym.st_info) == STT_SECTION) 815 continue; 816 817 char symstrbuf[50]; 818 const char *symstr = sym_name (ebl->elf, strndx, syms[cnt].sym.st_name, 819 symstrbuf, sizeof symstrbuf); 820 821#ifdef USE_DEMANGLE 822 /* Demangle if necessary. */ 823 if (demangle) 824 { 825 int status = -1; 826 char *dmsymstr = __cxa_demangle (symstr, demangle_buffer, 827 &demangle_buffer_len, &status); 828 829 if (status == 0) 830 symstr = dmsymstr; 831 } 832#endif 833 834 char symbindbuf[50]; 835 char symtypebuf[50]; 836 char secnamebuf[1024]; 837 char addressbuf[(64 + 2) / 3 + 1]; 838 char sizebuf[(64 + 2) / 3 + 1]; 839 840 /* If we have to precede the line with the file name. */ 841 if (print_file_name) 842 { 843 fputs_unlocked (fullname, stdout); 844 putchar_unlocked (':'); 845 } 846 847 /* Covert the address. */ 848 if (syms[cnt].sym.st_shndx == SHN_UNDEF) 849 addressbuf[0] = sizebuf[0] = '\0'; 850 else 851 { 852 snprintf (addressbuf, sizeof (addressbuf), number_fmtstr, 853 digits, syms[cnt].sym.st_value); 854 snprintf (sizebuf, sizeof (sizebuf), number_fmtstr, 855 digits, syms[cnt].sym.st_size); 856 } 857 858 /* Print the actual string. */ 859 printf ("%-*s|%s|%-6s|%-8s|%s|%*s|%s\n", 860 longest_name, symstr, addressbuf, 861 ebl_symbol_binding_name (ebl, 862 GELF_ST_BIND (syms[cnt].sym.st_info), 863 symbindbuf, sizeof (symbindbuf)), 864 ebl_symbol_type_name (ebl, GELF_ST_TYPE (syms[cnt].sym.st_info), 865 symtypebuf, sizeof (symtypebuf)), 866 sizebuf, longest_where, syms[cnt].where, 867 ebl_section_name (ebl, syms[cnt].sym.st_shndx, syms[cnt].xndx, 868 secnamebuf, sizeof (secnamebuf), scnnames, 869 shnum)); 870 } 871 872#ifdef USE_DEMANGLE 873 free (demangle_buffer); 874#endif 875 876 if (scnnames_malloced) 877 free (scnnames); 878} 879 880 881static char 882class_type_char (Elf *elf, const GElf_Ehdr *ehdr, GElf_Sym *sym) 883{ 884 int local_p = GELF_ST_BIND (sym->st_info) == STB_LOCAL; 885 886 /* XXX Add support for architecture specific types and classes. */ 887 if (sym->st_shndx == SHN_ABS) 888 return local_p ? 'a' : 'A'; 889 890 if (sym->st_shndx == SHN_UNDEF) 891 /* Undefined symbols must be global. */ 892 return 'U'; 893 894 char result = "NDTSFBD "[GELF_ST_TYPE (sym->st_info)]; 895 896 if (result == 'D') 897 { 898 /* Special handling: unique data symbols. */ 899 if (ehdr->e_ident[EI_OSABI] == ELFOSABI_LINUX 900 && GELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE) 901 result = 'u'; 902 else 903 { 904 GElf_Shdr shdr_mem; 905 GElf_Shdr *shdr = gelf_getshdr (elf_getscn (elf, sym->st_shndx), 906 &shdr_mem); 907 if (shdr != NULL) 908 { 909 if ((shdr->sh_flags & SHF_WRITE) == 0) 910 result = 'R'; 911 else if (shdr->sh_type == SHT_NOBITS) 912 result = 'B'; 913 } 914 } 915 } 916 917 return local_p ? tolower (result) : result; 918} 919 920 921static void 922show_symbols_bsd (Elf *elf, const GElf_Ehdr *ehdr, GElf_Word strndx, 923 const char *prefix, const char *fname, const char *fullname, 924 GElf_SymX *syms, size_t nsyms) 925{ 926 int digits = length_map[gelf_getclass (elf) - 1][radix]; 927 928 if (prefix != NULL && ! print_file_name) 929 printf ("\n%s:\n", fname); 930 931 static const char *const fmtstrs[] = 932 { 933 [radix_hex] = "%6$s%2$0*1$" PRIx64 "%8$s %7$s%3$c%4$s %5$s", 934 [radix_decimal] = "%6$s%*" PRId64 "%8$s %7$s%3$c%4$s %5$s", 935 [radix_octal] = "%6$s%2$0*1$" PRIo64 "%8$s %7$s%3$c%4$s %5$s" 936 }; 937 static const char *const sfmtstrs[] = 938 { 939 [radix_hex] = "%6$s%2$0*1$" PRIx64 "%8$s %10$0*9$" PRIx64 " %7$s%3$c%4$s %5$s", 940 [radix_decimal] = "%6$s%2$*1$" PRId64 "%8$s %10$*9$" PRId64 " %7$s%3$c%4$s %5$s", 941 [radix_octal] = "%6$s%2$0*1$" PRIo64 "%8$s %10$0*9$" PRIo64 " %7$s%3$c%4$s %5$s" 942 }; 943 944#ifdef USE_DEMANGLE 945 size_t demangle_buffer_len = 0; 946 char *demangle_buffer = NULL; 947#endif 948 949 /* Iterate over all symbols. */ 950 for (size_t cnt = 0; cnt < nsyms; ++cnt) 951 { 952 char symstrbuf[50]; 953 const char *symstr = sym_name (elf, strndx, syms[cnt].sym.st_name, 954 symstrbuf, sizeof symstrbuf); 955 956 /* Printing entries with a zero-length name makes the output 957 not very well parseable. Since these entries don't carry 958 much information we leave them out. */ 959 if (symstr[0] == '\0') 960 continue; 961 962 /* We do not print the entries for files. */ 963 if (GELF_ST_TYPE (syms[cnt].sym.st_info) == STT_FILE) 964 continue; 965 966#ifdef USE_DEMANGLE 967 /* Demangle if necessary. */ 968 if (demangle) 969 { 970 int status = -1; 971 char *dmsymstr = __cxa_demangle (symstr, demangle_buffer, 972 &demangle_buffer_len, &status); 973 974 if (status == 0) 975 symstr = dmsymstr; 976 } 977#endif 978 979 /* If we have to precede the line with the file name. */ 980 if (print_file_name) 981 { 982 fputs_unlocked (fullname, stdout); 983 putchar_unlocked (':'); 984 } 985 986 bool is_tls = GELF_ST_TYPE (syms[cnt].sym.st_info) == STT_TLS; 987 bool is_weak = GELF_ST_BIND (syms[cnt].sym.st_info) == STB_WEAK; 988 const char *marker = (mark_special 989 ? (is_tls ? "@" : (is_weak ? "*" : " ")) : ""); 990 991 if (syms[cnt].sym.st_shndx == SHN_UNDEF) 992 { 993 const char *color = ""; 994 if (color_mode) 995 { 996 if (is_tls) 997 color = color_undef_tls; 998 else if (is_weak) 999 color = color_undef_weak; 1000 else 1001 color = color_undef; 1002 } 1003 1004 printf ("%*s %sU%s %s", digits, "", color, marker, symstr); 1005 } 1006 else 1007 { 1008 const char *color = ""; 1009 if (color_mode) 1010 { 1011 if (is_tls) 1012 color = color_tls; 1013 else if (is_weak) 1014 color = color_weak; 1015 else 1016 color = color_symbol; 1017 } 1018 1019 printf (print_size && syms[cnt].sym.st_size != 0 1020 ? sfmtstrs[radix] : fmtstrs[radix], 1021 digits, syms[cnt].sym.st_value, 1022 class_type_char (elf, ehdr, &syms[cnt].sym), marker, 1023 symstr, 1024 color_mode ? color_address : "", 1025 color, 1026 color_mode ? color_off : "", 1027 digits, (uint64_t) syms[cnt].sym.st_size); 1028 } 1029 1030 if (color_mode) 1031 fputs_unlocked (color_off, stdout); 1032 putchar_unlocked ('\n'); 1033 } 1034 1035#ifdef USE_DEMANGLE 1036 free (demangle_buffer); 1037#endif 1038} 1039 1040 1041static void 1042show_symbols_posix (Elf *elf, const GElf_Ehdr *ehdr, GElf_Word strndx, 1043 const char *prefix, const char *fullname, GElf_SymX *syms, 1044 size_t nsyms) 1045{ 1046 if (prefix != NULL && ! print_file_name) 1047 printf ("%s:\n", fullname); 1048 1049 const char *fmtstr; 1050 if (radix == radix_hex) 1051 fmtstr = "%s %c%s %0*" PRIx64 " %0*" PRIx64 "\n"; 1052 else if (radix == radix_decimal) 1053 fmtstr = "%s %c%s %*" PRId64 " %*" PRId64 "\n"; 1054 else 1055 fmtstr = "%s %c%s %0*" PRIo64 " %0*" PRIo64 "\n"; 1056 1057 int digits = length_map[gelf_getclass (elf) - 1][radix]; 1058 1059#ifdef USE_DEMANGLE 1060 size_t demangle_buffer_len = 0; 1061 char *demangle_buffer = NULL; 1062#endif 1063 1064 /* Iterate over all symbols. */ 1065 for (size_t cnt = 0; cnt < nsyms; ++cnt) 1066 { 1067 char symstrbuf[50]; 1068 const char *symstr = sym_name (elf, strndx, syms[cnt].sym.st_name, 1069 symstrbuf, sizeof symstrbuf); 1070 1071 /* Printing entries with a zero-length name makes the output 1072 not very well parseable. Since these entries don't carry 1073 much information we leave them out. */ 1074 if (symstr[0] == '\0') 1075 continue; 1076 1077#ifdef USE_DEMANGLE 1078 /* Demangle if necessary. */ 1079 if (demangle) 1080 { 1081 int status = -1; 1082 char *dmsymstr = __cxa_demangle (symstr, demangle_buffer, 1083 &demangle_buffer_len, &status); 1084 1085 if (status == 0) 1086 symstr = dmsymstr; 1087 } 1088#endif 1089 1090 /* If we have to precede the line with the file name. */ 1091 if (print_file_name) 1092 { 1093 fputs_unlocked (fullname, stdout); 1094 putchar_unlocked (':'); 1095 putchar_unlocked (' '); 1096 } 1097 1098 printf (fmtstr, 1099 symstr, 1100 class_type_char (elf, ehdr, &syms[cnt].sym), 1101 mark_special 1102 ? (GELF_ST_TYPE (syms[cnt].sym.st_info) == STT_TLS 1103 ? "@" 1104 : (GELF_ST_BIND (syms[cnt].sym.st_info) == STB_WEAK 1105 ? "*" : " ")) 1106 : "", 1107 digits, syms[cnt].sym.st_value, 1108 digits, syms[cnt].sym.st_size); 1109 } 1110 1111#ifdef USE_DEMANGLE 1112 free (demangle_buffer); 1113#endif 1114} 1115 1116 1117/* Maximum size of memory we allocate on the stack. */ 1118#define MAX_STACK_ALLOC 65536 1119 1120static int 1121sort_by_address (const void *p1, const void *p2) 1122{ 1123 GElf_SymX *s1 = (GElf_SymX *) p1; 1124 GElf_SymX *s2 = (GElf_SymX *) p2; 1125 1126 int result = (s1->sym.st_value < s2->sym.st_value 1127 ? -1 : (s1->sym.st_value == s2->sym.st_value ? 0 : 1)); 1128 1129 return reverse_sort ? -result : result; 1130} 1131 1132static Elf_Data *sort_by_name_strtab; 1133 1134static int 1135sort_by_name (const void *p1, const void *p2) 1136{ 1137 GElf_SymX *s1 = (GElf_SymX *) p1; 1138 GElf_SymX *s2 = (GElf_SymX *) p2; 1139 1140 const char *n1 = sort_by_name_strtab->d_buf + s1->sym.st_name; 1141 const char *n2 = sort_by_name_strtab->d_buf + s2->sym.st_name; 1142 1143 int result = strcmp (n1, n2); 1144 1145 return reverse_sort ? -result : result; 1146} 1147 1148static void 1149show_symbols (Ebl *ebl, GElf_Ehdr *ehdr, Elf_Scn *scn, Elf_Scn *xndxscn, 1150 GElf_Shdr *shdr, const char *prefix, const char *fname, 1151 const char *fullname) 1152{ 1153 /* Get the section header string table index. */ 1154 size_t shstrndx; 1155 if (elf_getshdrstrndx (ebl->elf, &shstrndx) < 0) 1156 error (EXIT_FAILURE, 0, 1157 gettext ("cannot get section header string table index")); 1158 1159 /* The section is that large. */ 1160 size_t size = shdr->sh_size; 1161 /* One entry is this large. */ 1162 size_t entsize = shdr->sh_entsize; 1163 1164 /* Consistency checks. */ 1165 if (entsize != gelf_fsize (ebl->elf, ELF_T_SYM, 1, ehdr->e_version)) 1166 error (0, 0, 1167 gettext ("%s: entry size in section `%s' is not what we expect"), 1168 fullname, elf_strptr (ebl->elf, shstrndx, shdr->sh_name)); 1169 else if (size % entsize != 0) 1170 error (0, 0, 1171 gettext ("%s: size of section `%s' is not multiple of entry size"), 1172 fullname, elf_strptr (ebl->elf, shstrndx, shdr->sh_name)); 1173 1174 /* Compute number of entries. Handle buggy entsize values. */ 1175 size_t nentries = size / (entsize ?: 1); 1176 1177 1178#define obstack_chunk_alloc xmalloc 1179#define obstack_chunk_free free 1180 struct obstack whereob; 1181 obstack_init (&whereob); 1182 1183 /* Get a DWARF debugging descriptor. It's no problem if this isn't 1184 possible. We just won't print any line number information. */ 1185 Dwarf *dbg = NULL; 1186 if (format == format_sysv) 1187 { 1188 dbg = dwarf_begin_elf (ebl->elf, DWARF_C_READ, NULL); 1189 if (dbg != NULL) 1190 { 1191 (void) dwarf_getpubnames (dbg, get_global, NULL, 0); 1192 1193 get_local_names (dbg); 1194 } 1195 } 1196 1197 /* Allocate the memory. 1198 1199 XXX We can use a dirty trick here. Since GElf_Sym == Elf64_Sym we 1200 can use the data memory instead of copying again if what we read 1201 is a 64 bit file. */ 1202 GElf_SymX *sym_mem; 1203 if (nentries * sizeof (GElf_SymX) < MAX_STACK_ALLOC) 1204 sym_mem = (GElf_SymX *) alloca (nentries * sizeof (GElf_SymX)); 1205 else 1206 sym_mem = (GElf_SymX *) xmalloc (nentries * sizeof (GElf_SymX)); 1207 1208 /* Get the data of the section. */ 1209 Elf_Data *data = elf_getdata (scn, NULL); 1210 Elf_Data *xndxdata = elf_getdata (xndxscn, NULL); 1211 if (data == NULL || (xndxscn != NULL && xndxdata == NULL)) 1212 INTERNAL_ERROR (fullname); 1213 1214 /* Iterate over all symbols. */ 1215#ifdef USE_DEMANGLE 1216 size_t demangle_buffer_len = 0; 1217 char *demangle_buffer = NULL; 1218#endif 1219 int longest_name = 4; 1220 int longest_where = 4; 1221 size_t nentries_used = 0; 1222 for (size_t cnt = 0; cnt < nentries; ++cnt) 1223 { 1224 GElf_Sym *sym = gelf_getsymshndx (data, xndxdata, cnt, 1225 &sym_mem[nentries_used].sym, 1226 &sym_mem[nentries_used].xndx); 1227 if (sym == NULL) 1228 INTERNAL_ERROR (fullname); 1229 1230 /* Filter out administrative symbols without a name and those 1231 deselected by the user with command line options. */ 1232 if ((hide_undefined && sym->st_shndx == SHN_UNDEF) 1233 || (hide_defined && sym->st_shndx != SHN_UNDEF) 1234 || (hide_local && GELF_ST_BIND (sym->st_info) == STB_LOCAL)) 1235 continue; 1236 1237 sym_mem[nentries_used].where = ""; 1238 if (format == format_sysv) 1239 { 1240 const char *symstr = elf_strptr (ebl->elf, shdr->sh_link, 1241 sym->st_name); 1242 if (symstr == NULL) 1243 continue; 1244 1245#ifdef USE_DEMANGLE 1246 /* Demangle if necessary. */ 1247 if (demangle) 1248 { 1249 int status = -1; 1250 char *dmsymstr = __cxa_demangle (symstr, demangle_buffer, 1251 &demangle_buffer_len, &status); 1252 1253 if (status == 0) 1254 symstr = dmsymstr; 1255 } 1256#endif 1257 1258 longest_name = MAX ((size_t) longest_name, strlen (symstr)); 1259 1260 if (sym->st_shndx != SHN_UNDEF 1261 && GELF_ST_BIND (sym->st_info) != STB_LOCAL 1262 && global_root != NULL) 1263 { 1264 Dwarf_Global fake = { .name = symstr }; 1265 Dwarf_Global **found = tfind (&fake, &global_root, 1266 global_compare); 1267 if (found != NULL) 1268 { 1269 Dwarf_Die die_mem; 1270 Dwarf_Die *die = dwarf_offdie (dbg, (*found)->die_offset, 1271 &die_mem); 1272 1273 Dwarf_Die cudie_mem; 1274 Dwarf_Die *cudie = NULL; 1275 1276 Dwarf_Addr lowpc; 1277 Dwarf_Addr highpc; 1278 if (die != NULL 1279 && dwarf_lowpc (die, &lowpc) == 0 1280 && lowpc <= sym->st_value 1281 && dwarf_highpc (die, &highpc) == 0 1282 && highpc > sym->st_value) 1283 cudie = dwarf_offdie (dbg, (*found)->cu_offset, 1284 &cudie_mem); 1285 if (cudie != NULL) 1286 { 1287 Dwarf_Line *line = dwarf_getsrc_die (cudie, 1288 sym->st_value); 1289 if (line != NULL) 1290 { 1291 /* We found the line. */ 1292 int lineno; 1293 (void) dwarf_lineno (line, &lineno); 1294 int n; 1295 n = obstack_printf (&whereob, "%s:%d%c", 1296 basename (dwarf_linesrc (line, 1297 NULL, 1298 NULL)), 1299 lineno, '\0'); 1300 sym_mem[nentries_used].where 1301 = obstack_finish (&whereob); 1302 1303 /* The return value of obstack_print included the 1304 NUL byte, so subtract one. */ 1305 if (--n > (int) longest_where) 1306 longest_where = (size_t) n; 1307 } 1308 } 1309 } 1310 } 1311 1312 /* Try to find the symbol among the local symbols. */ 1313 if (sym_mem[nentries_used].where[0] == '\0') 1314 { 1315 struct local_name fake = 1316 { 1317 .name = symstr, 1318 .lowpc = sym->st_value, 1319 .highpc = sym->st_value, 1320 }; 1321 struct local_name **found = tfind (&fake, &local_root, 1322 local_compare); 1323 if (found != NULL) 1324 { 1325 /* We found the line. */ 1326 int n = obstack_printf (&whereob, "%s:%" PRIu64 "%c", 1327 basename ((*found)->file), 1328 (*found)->lineno, 1329 '\0'); 1330 sym_mem[nentries_used].where = obstack_finish (&whereob); 1331 1332 /* The return value of obstack_print included the 1333 NUL byte, so subtract one. */ 1334 if (--n > (int) longest_where) 1335 longest_where = (size_t) n; 1336 } 1337 } 1338 } 1339 1340 /* We use this entry. */ 1341 ++nentries_used; 1342 } 1343#ifdef USE_DEMANGLE 1344 free (demangle_buffer); 1345#endif 1346 /* Now we know the exact number. */ 1347 nentries = nentries_used; 1348 1349 /* Sort the entries according to the users wishes. */ 1350 if (sort == sort_name) 1351 { 1352 sort_by_name_strtab = elf_getdata (elf_getscn (ebl->elf, shdr->sh_link), 1353 NULL); 1354 qsort (sym_mem, nentries, sizeof (GElf_SymX), sort_by_name); 1355 } 1356 else if (sort == sort_numeric) 1357 qsort (sym_mem, nentries, sizeof (GElf_SymX), sort_by_address); 1358 1359 /* Finally print according to the users selection. */ 1360 switch (format) 1361 { 1362 case format_sysv: 1363 show_symbols_sysv (ebl, shdr->sh_link, fullname, sym_mem, nentries, 1364 longest_name, longest_where); 1365 break; 1366 1367 case format_bsd: 1368 show_symbols_bsd (ebl->elf, ehdr, shdr->sh_link, prefix, fname, fullname, 1369 sym_mem, nentries); 1370 break; 1371 1372 case format_posix: 1373 default: 1374 assert (format == format_posix); 1375 show_symbols_posix (ebl->elf, ehdr, shdr->sh_link, prefix, fullname, 1376 sym_mem, nentries); 1377 break; 1378 } 1379 1380 /* Free all memory. */ 1381 if (nentries * sizeof (GElf_Sym) >= MAX_STACK_ALLOC) 1382 free (sym_mem); 1383 1384 obstack_free (&whereob, NULL); 1385 1386 if (dbg != NULL) 1387 { 1388 tdestroy (global_root, free); 1389 global_root = NULL; 1390 1391 tdestroy (local_root, free); 1392 local_root = NULL; 1393 1394 (void) dwarf_end (dbg); 1395 } 1396} 1397 1398 1399static int 1400handle_elf (Elf *elf, const char *prefix, const char *fname, 1401 const char *suffix) 1402{ 1403 size_t prefix_len = prefix == NULL ? 0 : strlen (prefix); 1404 size_t suffix_len = suffix == NULL ? 0 : strlen (suffix); 1405 size_t fname_len = strlen (fname) + 1; 1406 char fullname[prefix_len + 1 + fname_len + suffix_len]; 1407 char *cp = fullname; 1408 Elf_Scn *scn = NULL; 1409 int any = 0; 1410 int result = 0; 1411 GElf_Ehdr ehdr_mem; 1412 GElf_Ehdr *ehdr; 1413 Ebl *ebl; 1414 1415 /* Get the backend for this object file type. */ 1416 ebl = ebl_openbackend (elf); 1417 1418 /* We need the ELF header in a few places. */ 1419 ehdr = gelf_getehdr (elf, &ehdr_mem); 1420 if (ehdr == NULL) 1421 INTERNAL_ERROR (fullname); 1422 1423 /* If we are asked to print the dynamic symbol table and this is 1424 executable or dynamic executable, fail. */ 1425 if (symsec_type == SHT_DYNSYM 1426 && ehdr->e_type != ET_EXEC && ehdr->e_type != ET_DYN) 1427 { 1428 /* XXX Add machine specific object file types. */ 1429 error (0, 0, gettext ("%s%s%s%s: Invalid operation"), 1430 prefix ?: "", prefix ? "(" : "", fname, prefix ? ")" : ""); 1431 result = 1; 1432 goto out; 1433 } 1434 1435 /* Create the full name of the file. */ 1436 if (prefix != NULL) 1437 cp = mempcpy (cp, prefix, prefix_len); 1438 cp = mempcpy (cp, fname, fname_len); 1439 if (suffix != NULL) 1440 memcpy (cp - 1, suffix, suffix_len + 1); 1441 1442 /* Find the symbol table. 1443 1444 XXX Can there be more than one? Do we print all? Currently we do. */ 1445 while ((scn = elf_nextscn (elf, scn)) != NULL) 1446 { 1447 GElf_Shdr shdr_mem; 1448 GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem); 1449 1450 if (shdr == NULL) 1451 INTERNAL_ERROR (fullname); 1452 1453 if (shdr->sh_type == symsec_type) 1454 { 1455 Elf_Scn *xndxscn = NULL; 1456 1457 /* We have a symbol table. First make sure we remember this. */ 1458 any = 1; 1459 1460 /* Look for an extended section index table for this section. */ 1461 if (symsec_type == SHT_SYMTAB) 1462 { 1463 size_t scnndx = elf_ndxscn (scn); 1464 1465 while ((xndxscn = elf_nextscn (elf, xndxscn)) != NULL) 1466 { 1467 GElf_Shdr xndxshdr_mem; 1468 GElf_Shdr *xndxshdr = gelf_getshdr (xndxscn, &xndxshdr_mem); 1469 1470 if (xndxshdr == NULL) 1471 INTERNAL_ERROR (fullname); 1472 1473 if (xndxshdr->sh_type == SHT_SYMTAB_SHNDX 1474 && xndxshdr->sh_link == scnndx) 1475 break; 1476 } 1477 } 1478 1479 show_symbols (ebl, ehdr, scn, xndxscn, shdr, prefix, fname, 1480 fullname); 1481 } 1482 } 1483 1484 if (! any) 1485 { 1486 error (0, 0, gettext ("%s%s%s: no symbols"), 1487 prefix ?: "", prefix ? ":" : "", fname); 1488 result = 1; 1489 } 1490 1491 out: 1492 /* Close the ELF backend library descriptor. */ 1493 ebl_closebackend (ebl); 1494 1495 return result; 1496} 1497 1498 1499#include "debugpred.h" 1500