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@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
39int
40main (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