1 /* Test program for elf_strptr function. 2 Copyright (C) 2015 Red Hat, Inc. 3 This file is part of elfutils. 4 5 This file is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 3 of the License, or 8 (at your option) any later version. 9 10 elfutils is distributed in the hope that it will be useful, but 11 WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 17 18 #ifdef HAVE_CONFIG_H 19 # include <config.h> 20 #endif 21 22 #include <errno.h> 23 #include <fcntl.h> 24 #include <inttypes.h> 25 #include <stdio.h> 26 #include <stdlib.h> 27 #include <string.h> 28 #include <unistd.h> 29 30 #include ELFUTILS_HEADER(elf) 31 #include <gelf.h> 32 33 int 34 main (int argc, char *argv[]) 35 { 36 if (argc != 2) 37 { 38 printf ("No ELF file given as argument"); 39 exit (1); 40 } 41 42 const char *fname = argv[1]; 43 44 // Initialize libelf. 45 elf_version (EV_CURRENT); 46 47 /* Read the ELF from disk now. */ 48 int fd = open (fname, O_RDONLY); 49 if (fd == -1) 50 { 51 printf ("cannot open `%s' read-only: %s\n", fname, strerror (errno)); 52 exit (1); 53 } 54 55 Elf *elf = elf_begin (fd, ELF_C_READ, NULL); 56 if (elf == NULL) 57 { 58 printf ("cannot create ELF descriptor read-only: %s\n", elf_errmsg (-1)); 59 exit (1); 60 } 61 62 size_t ndx; 63 if (elf_getshdrstrndx (elf, &ndx) != 0) 64 { 65 printf ("cannot get section header table index: %s\n", elf_errmsg (-1)); 66 exit (1); 67 } 68 69 if (ndx == SHN_UNDEF) 70 { 71 printf ("ELF file `%s' doesn't have a section header table index", fname); 72 exit (1); 73 } 74 75 printf ("Strings in section %zd:\n", ndx); 76 77 size_t off = 0; 78 const char *str = elf_strptr (elf, ndx, off); 79 while (str != NULL) 80 { 81 printf ("[%zx] '%s'\n", off, str); 82 off += strlen (str) + 1; 83 str = elf_strptr (elf, ndx, off); 84 } 85 86 if (elf_end (elf) != 0) 87 { 88 printf ("failure in elf_end: %s\n", elf_errmsg (-1)); 89 exit (1); 90 } 91 92 close (fd); 93 94 return 0; 95 } 96
