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
31
32int
33main (int argc, char *argv[] __attribute__ ((unused)))
34{
35  const char *fname = "xxx_update1";
36  int fd;
37  Elf *elf;
38  Elf32_Ehdr *ehdr;
39  int i;
40
41  fd = open (fname, O_RDWR | O_CREAT | O_TRUNC, 0666);
42  if (fd == -1)
43    {
44      printf ("cannot open `%s': %s\n", fname, strerror (errno));
45      exit (1);
46    }
47
48  elf_version (EV_CURRENT);
49
50  elf = elf_begin (fd, ELF_C_WRITE, NULL);
51  if (elf == NULL)
52    {
53      printf ("cannot create ELF descriptor: %s\n", elf_errmsg (-1));
54      exit (1);
55    }
56
57  /* Create an ELF header.  */
58  ehdr = elf32_newehdr (elf);
59  if (ehdr == NULL)
60    {
61      printf ("cannot create ELF header: %s\n", elf_errmsg (-1));
62      exit (1);
63    }
64
65  /* Print the ELF header values.  */
66  if (argc > 1)
67    {
68      for (i = 0; i < EI_NIDENT; ++i)
69	printf (" %02x", ehdr->e_ident[i]);
70      printf ("\
71\ntype = %hu\nmachine = %hu\nversion = %u\nentry = %u\nphoff = %u\n"
72	      "shoff = %u\nflags = %u\nehsize = %hu\nphentsize = %hu\n"
73	      "phnum = %hu\nshentsize = %hu\nshnum = %hu\nshstrndx = %hu\n",
74	      ehdr->e_type, ehdr->e_machine, ehdr->e_version, ehdr->e_entry,
75	      ehdr->e_phoff, ehdr->e_shoff, ehdr->e_flags, ehdr->e_ehsize,
76	      ehdr->e_phentsize, ehdr->e_phnum, ehdr->e_shentsize,
77	      ehdr->e_shnum, ehdr->e_shstrndx);
78    }
79
80  ehdr->e_ident[0] = 42;
81  ehdr->e_ident[4] = 1;
82  ehdr->e_ident[5] = 1;
83  ehdr->e_ident[6] = 2;
84  ehdr->e_ident[9] = 2;
85  ehdr->e_version = 1;
86  ehdr->e_ehsize = 1;
87
88  /* Write out the file.  */
89  if (elf_update (elf, ELF_C_WRITE) < 0)
90    {
91      printf ("failure in elf_update: %s\n", elf_errmsg (-1));
92      exit (1);
93    }
94
95  /* Create an ELF header.  */
96  ehdr = elf32_newehdr (elf);
97  if (ehdr == NULL)
98    {
99      printf ("cannot create ELF header: %s\n", elf_errmsg (-1));
100      exit (1);
101    }
102
103  /* Print the ELF header values.  */
104  if (argc > 1)
105    {
106      for (i = 0; i < EI_NIDENT; ++i)
107	printf (" %02x", ehdr->e_ident[i]);
108      printf ("\
109\ntype = %hu\nmachine = %hu\nversion = %u\nentry = %u\nphoff = %u\n"
110	      "shoff = %u\nflags = %u\nehsize = %hu\nphentsize = %hu\n"
111	      "phnum = %hu\nshentsize = %hu\nshnum = %hu\nshstrndx = %hu\n",
112	      ehdr->e_type, ehdr->e_machine, ehdr->e_version, ehdr->e_entry,
113	      ehdr->e_phoff, ehdr->e_shoff, ehdr->e_flags, ehdr->e_ehsize,
114	      ehdr->e_phentsize, ehdr->e_phnum, ehdr->e_shentsize,
115	      ehdr->e_shnum, ehdr->e_shstrndx);
116    }
117
118  if (elf_end (elf) != 0)
119    {
120      printf ("failure in elf_end: %s\n", elf_errmsg (-1));
121      exit (1);
122    }
123
124  unlink (fname);
125
126  return 0;
127}
128