1/* Test program for elf_update function. 2 Copyright (C) 2000, 2002, 2005 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 <errno.h> 24#include <fcntl.h> 25#include <libelf.h> 26#include <stdio.h> 27#include <stdlib.h> 28#include <string.h> 29#include <unistd.h> 30#include "system.h" 31 32 33int 34main (int argc, char *argv[] __attribute__ ((unused))) 35{ 36 const char *fname = "xxx_update1"; 37 int fd; 38 Elf *elf; 39 Elf32_Ehdr *ehdr; 40 int i; 41 42 fd = open (fname, O_RDWR | O_CREAT | O_TRUNC, DEFFILEMODE); 43 if (fd == -1) 44 { 45 printf ("cannot open `%s': %s\n", fname, strerror (errno)); 46 exit (1); 47 } 48 49 elf_version (EV_CURRENT); 50 51 elf = elf_begin (fd, ELF_C_WRITE, NULL); 52 if (elf == NULL) 53 { 54 printf ("cannot create ELF descriptor: %s\n", elf_errmsg (-1)); 55 exit (1); 56 } 57 58 /* Create an ELF header. */ 59 ehdr = elf32_newehdr (elf); 60 if (ehdr == NULL) 61 { 62 printf ("cannot create ELF header: %s\n", elf_errmsg (-1)); 63 exit (1); 64 } 65 66 /* Print the ELF header values. */ 67 if (argc > 1) 68 { 69 for (i = 0; i < EI_NIDENT; ++i) 70 printf (" %02x", ehdr->e_ident[i]); 71 printf ("\ 72\ntype = %hu\nmachine = %hu\nversion = %u\nentry = %u\nphoff = %u\n" 73 "shoff = %u\nflags = %u\nehsize = %hu\nphentsize = %hu\n" 74 "phnum = %hu\nshentsize = %hu\nshnum = %hu\nshstrndx = %hu\n", 75 ehdr->e_type, ehdr->e_machine, ehdr->e_version, ehdr->e_entry, 76 ehdr->e_phoff, ehdr->e_shoff, ehdr->e_flags, ehdr->e_ehsize, 77 ehdr->e_phentsize, ehdr->e_phnum, ehdr->e_shentsize, 78 ehdr->e_shnum, ehdr->e_shstrndx); 79 } 80 81 ehdr->e_ident[0] = 42; 82 ehdr->e_ident[4] = 1; 83 ehdr->e_ident[5] = 1; 84 ehdr->e_ident[6] = 2; 85 ehdr->e_ident[9] = 2; 86 ehdr->e_version = 1; 87 ehdr->e_ehsize = 1; 88 89 /* Write out the file. */ 90 if (elf_update (elf, ELF_C_WRITE) < 0) 91 { 92 printf ("failure in elf_update: %s\n", elf_errmsg (-1)); 93 exit (1); 94 } 95 96 /* Create an ELF header. */ 97 ehdr = elf32_newehdr (elf); 98 if (ehdr == NULL) 99 { 100 printf ("cannot create ELF header: %s\n", elf_errmsg (-1)); 101 exit (1); 102 } 103 104 /* Print the ELF header values. */ 105 if (argc > 1) 106 { 107 for (i = 0; i < EI_NIDENT; ++i) 108 printf (" %02x", ehdr->e_ident[i]); 109 printf ("\ 110\ntype = %hu\nmachine = %hu\nversion = %u\nentry = %u\nphoff = %u\n" 111 "shoff = %u\nflags = %u\nehsize = %hu\nphentsize = %hu\n" 112 "phnum = %hu\nshentsize = %hu\nshnum = %hu\nshstrndx = %hu\n", 113 ehdr->e_type, ehdr->e_machine, ehdr->e_version, ehdr->e_entry, 114 ehdr->e_phoff, ehdr->e_shoff, ehdr->e_flags, ehdr->e_ehsize, 115 ehdr->e_phentsize, ehdr->e_phnum, ehdr->e_shentsize, 116 ehdr->e_shnum, ehdr->e_shstrndx); 117 } 118 119 if (elf_end (elf) != 0) 120 { 121 printf ("failure in elf_end: %s\n", elf_errmsg (-1)); 122 exit (1); 123 } 124 125 unlink (fname); 126 127 return 0; 128} 129