1 /* Test program for elf_update function. 2 Copyright (C) 2000, 2002, 2005 Red Hat, Inc. 3 This file is part of Red Hat elfutils. 4 Written by Ulrich Drepper <drepper (at) redhat.com>, 2000. 5 6 Red Hat elfutils is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by the 8 Free Software Foundation; version 2 of the License. 9 10 Red Hat 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 GNU 13 General Public License for more details. 14 15 You should have received a copy of the GNU General Public License along 16 with Red Hat elfutils; if not, write to the Free Software Foundation, 17 Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. 18 19 Red Hat elfutils is an included package of the Open Invention Network. 20 An included package of the Open Invention Network is a package for which 21 Open Invention Network licensees cross-license their patents. No patent 22 license is granted, either expressly or impliedly, by designation as an 23 included package. Should you wish to participate in the Open Invention 24 Network licensing program, please visit www.openinventionnetwork.com 25 <http://www.openinventionnetwork.com>. */ 26 27 #ifdef HAVE_CONFIG_H 28 # include <config.h> 29 #endif 30 31 #include <errno.h> 32 #include <fcntl.h> 33 #include <libelf.h> 34 #include <stdio.h> 35 #include <stdlib.h> 36 #include <string.h> 37 38 39 int 40 main (int argc, char *argv[] __attribute__ ((unused))) 41 { 42 const char *fname = "xxx"; 43 int fd; 44 Elf *elf; 45 Elf32_Ehdr *ehdr; 46 int i; 47 48 fd = open (fname, O_RDWR | O_CREAT | O_TRUNC, 0666); 49 if (fd == -1) 50 { 51 printf ("cannot open `%s': %s\n", fname, strerror (errno)); 52 exit (1); 53 } 54 55 elf_version (EV_CURRENT); 56 57 elf = elf_begin (fd, ELF_C_WRITE, NULL); 58 if (elf == NULL) 59 { 60 printf ("cannot create ELF descriptor: %s\n", elf_errmsg (-1)); 61 exit (1); 62 } 63 64 /* Create an ELF header. */ 65 ehdr = elf32_newehdr (elf); 66 if (ehdr == NULL) 67 { 68 printf ("cannot create ELF header: %s\n", elf_errmsg (-1)); 69 exit (1); 70 } 71 72 /* Print the ELF header values. */ 73 if (argc > 1) 74 { 75 for (i = 0; i < EI_NIDENT; ++i) 76 printf (" %02x", ehdr->e_ident[i]); 77 printf ("\ 78 \ntype = %hu\nmachine = %hu\nversion = %u\nentry = %u\nphoff = %u\n" 79 "shoff = %u\nflags = %u\nehsize = %hu\nphentsize = %hu\n" 80 "phnum = %hu\nshentsize = %hu\nshnum = %hu\nshstrndx = %hu\n", 81 ehdr->e_type, ehdr->e_machine, ehdr->e_version, ehdr->e_entry, 82 ehdr->e_phoff, ehdr->e_shoff, ehdr->e_flags, ehdr->e_ehsize, 83 ehdr->e_phentsize, ehdr->e_phnum, ehdr->e_shentsize, 84 ehdr->e_shnum, ehdr->e_shstrndx); 85 } 86 87 ehdr->e_ident[0] = 42; 88 ehdr->e_ident[4] = 1; 89 ehdr->e_ident[5] = 1; 90 ehdr->e_ident[6] = 2; 91 ehdr->e_ident[9] = 2; 92 ehdr->e_version = 1; 93 ehdr->e_ehsize = 1; 94 95 /* Write out the file. */ 96 if (elf_update (elf, ELF_C_WRITE) < 0) 97 { 98 printf ("failure in elf_update: %s\n", elf_errmsg (-1)); 99 exit (1); 100 } 101 102 /* Create an ELF header. */ 103 ehdr = elf32_newehdr (elf); 104 if (ehdr == NULL) 105 { 106 printf ("cannot create ELF header: %s\n", elf_errmsg (-1)); 107 exit (1); 108 } 109 110 /* Print the ELF header values. */ 111 if (argc > 1) 112 { 113 for (i = 0; i < EI_NIDENT; ++i) 114 printf (" %02x", ehdr->e_ident[i]); 115 printf ("\ 116 \ntype = %hu\nmachine = %hu\nversion = %u\nentry = %u\nphoff = %u\n" 117 "shoff = %u\nflags = %u\nehsize = %hu\nphentsize = %hu\n" 118 "phnum = %hu\nshentsize = %hu\nshnum = %hu\nshstrndx = %hu\n", 119 ehdr->e_type, ehdr->e_machine, ehdr->e_version, ehdr->e_entry, 120 ehdr->e_phoff, ehdr->e_shoff, ehdr->e_flags, ehdr->e_ehsize, 121 ehdr->e_phentsize, ehdr->e_phnum, ehdr->e_shentsize, 122 ehdr->e_shnum, ehdr->e_shstrndx); 123 } 124 125 if (elf_end (elf) != 0) 126 { 127 printf ("failure in elf_end: %s\n", elf_errmsg (-1)); 128 exit (1); 129 } 130 131 return 0; 132 } 133
