1 /* Copyright (C) 1999, 2000, 2001, 2002, 2005 Red Hat, Inc. 2 This file is part of elfutils. 3 Written by Ulrich Drepper <drepper (at) redhat.com>, 1999. 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 #include <config.h> 19 20 #include <libelf.h> 21 #include <stdio.h> 22 #include <stdlib.h> 23 #include <unistd.h> 24 25 static void 26 print_ehdr (Elf32_Ehdr *ehdr) 27 { 28 int n; 29 30 for (n = 0; n < EI_NIDENT; ++n) 31 printf (" %02x", ehdr->e_ident[n]); 32 33 printf ("\ntype = %d\nmachine = %d\nversion = %d\nentry = %d\n" 34 "phoff = %d\nshoff = %d\nflags = %d\nehsize = %d\n" 35 "phentsize = %d\nphnum = %d\nshentsize = %d\nshnum = %d\n" 36 "shstrndx = %d\n", 37 ehdr->e_type, 38 ehdr->e_machine, 39 ehdr->e_version, 40 ehdr->e_entry, 41 ehdr->e_phoff, 42 ehdr->e_shoff, 43 ehdr->e_flags, 44 ehdr->e_ehsize, 45 ehdr->e_phentsize, 46 ehdr->e_phnum, 47 ehdr->e_shentsize, 48 ehdr->e_shnum, 49 ehdr->e_shstrndx); 50 } 51 52 int 53 main (int argc, char *argv[] __attribute__ ((unused))) 54 { 55 Elf *elf; 56 int result = 0; 57 int fd; 58 char fname[] = "newfile-XXXXXX"; 59 60 fd = mkstemp (fname); 61 if (fd == -1) 62 { 63 printf ("cannot create temporary file: %m\n"); 64 exit (1); 65 } 66 /* Remove the file when we exit. */ 67 unlink (fname); 68 69 elf_version (EV_CURRENT); 70 elf = elf_begin (fd, ELF_C_WRITE, NULL); 71 if (elf == NULL) 72 { 73 printf ("elf_begin: %s\n", elf_errmsg (-1)); 74 result = 1; 75 } 76 else 77 { 78 if (elf32_newehdr (elf) == NULL) 79 { 80 printf ("elf32_newehdr: %s\n", elf_errmsg (-1)); 81 result = 1; 82 } 83 else 84 { 85 Elf32_Ehdr *ehdr = elf32_getehdr (elf); 86 87 if (ehdr == NULL) 88 { 89 printf ("elf32_getehdr: %s\n", elf_errmsg (-1)); 90 result = 1; 91 } 92 else 93 { 94 int i; 95 96 if (argc > 1) 97 /* Use argc as a debugging flag. */ 98 print_ehdr (ehdr); 99 100 /* Some tests. */ 101 for (i = 0; i < EI_NIDENT; ++i) 102 if (ehdr->e_ident[i] != 0) 103 { 104 printf ("ehdr->e_ident[%d] != 0\n", i); 105 result = 1; 106 break; 107 } 108 109 #define VALUE_TEST(name, val) \ 110 if (ehdr->name != val) \ 111 { \ 112 printf ("ehdr->%s != %d\n", #name, val); \ 113 result = 1; \ 114 } 115 #define ZERO_TEST(name) VALUE_TEST (name, 0) 116 ZERO_TEST (e_type); 117 ZERO_TEST (e_machine); 118 ZERO_TEST (e_version); 119 ZERO_TEST (e_entry); 120 ZERO_TEST (e_phoff); 121 ZERO_TEST (e_shoff); 122 ZERO_TEST (e_flags); 123 ZERO_TEST (e_ehsize); 124 ZERO_TEST (e_phentsize); 125 ZERO_TEST (e_phnum); 126 ZERO_TEST (e_shentsize); 127 ZERO_TEST (e_shnum); 128 ZERO_TEST (e_shstrndx); 129 130 if (elf32_newphdr (elf, 10) == NULL) 131 { 132 printf ("elf32_newphdr: %s\n", elf_errmsg (-1)); 133 result = 1; 134 } 135 else 136 { 137 if (argc > 1) 138 print_ehdr (ehdr); 139 140 ehdr = elf32_getehdr (elf); 141 if (ehdr == NULL) 142 { 143 printf ("elf32_getehdr (#2): %s\n", elf_errmsg (-1)); 144 result = 1; 145 } 146 else 147 { 148 ZERO_TEST (e_type); 149 ZERO_TEST (e_machine); 150 ZERO_TEST (e_version); 151 ZERO_TEST (e_entry); 152 ZERO_TEST (e_phoff); 153 ZERO_TEST (e_shoff); 154 ZERO_TEST (e_flags); 155 ZERO_TEST (e_ehsize); 156 VALUE_TEST (e_phentsize, (int) sizeof (Elf32_Phdr)); 157 VALUE_TEST (e_phnum, 10); 158 ZERO_TEST (e_shentsize); 159 ZERO_TEST (e_shnum); 160 ZERO_TEST (e_shstrndx); 161 } 162 } 163 } 164 } 165 166 (void) elf_end (elf); 167 } 168 169 return result; 170 } 171
