1/* Test program for elf_update function.
2   Copyright (C) 2000, 2002 Red Hat, Inc.
3   Written by Ulrich Drepper <drepper@redhat.com>, 2000.
4
5   This program is Open Source software; you can redistribute it and/or
6   modify it under the terms of the Open Software License version 1.0 as
7   published by the Open Source Initiative.
8
9   You should have received a copy of the Open Software License along
10   with this program; if not, you may obtain a copy of the Open Software
11   License version 1.0 from http://www.opensource.org/licenses/osl.php or
12   by writing the Open Source Initiative c/o Lawrence Rosen, Esq.,
13   3001 King Ranch Road, Ukiah, CA 95482.   */
14
15#ifdef HAVE_CONFIG_H
16# include <config.h>
17#endif
18
19#include <errno.h>
20#include <fcntl.h>
21#include <libelf.h>
22#include <stdio.h>
23#include <stdlib.h>
24#include <string.h>
25
26
27int
28main (int argc, char *argv[])
29{
30  const char *fname = "xxx";
31  int fd;
32  Elf *elf;
33  Elf32_Ehdr *ehdr;
34  Elf32_Phdr *phdr;
35  int i;
36
37  fd = open (fname, O_RDWR | O_CREAT | O_TRUNC, 0666);
38  if (fd == -1)
39    {
40      printf ("cannot open `%s': %s\n", fname, strerror (errno));
41      exit (1);
42    }
43
44  elf_version (EV_CURRENT);
45
46  elf = elf_begin (fd, ELF_C_WRITE, NULL);
47  if (elf == NULL)
48    {
49      printf ("cannot create ELF descriptor: %s\n", elf_errmsg (-1));
50      exit (1);
51    }
52
53  /* Create an ELF header.  */
54  ehdr = elf32_newehdr (elf);
55  if (ehdr == NULL)
56    {
57      printf ("cannot create ELF header: %s\n", elf_errmsg (-1));
58      exit (1);
59    }
60
61  /* Print the ELF header values.  */
62  if (argc > 1)
63    {
64      for (i = 0; i < EI_NIDENT; ++i)
65	printf (" %02x", ehdr->e_ident[i]);
66      printf ("\
67\ntype = %hu\nmachine = %hu\nversion = %u\nentry = %u\nphoff = %u\n"
68	      "shoff = %u\nflags = %u\nehsize = %hu\nphentsize = %hu\n"
69	      "phnum = %hu\nshentsize = %hu\nshnum = %hu\nshstrndx = %hu\n",
70	      ehdr->e_type, ehdr->e_machine, ehdr->e_version, ehdr->e_entry,
71	      ehdr->e_phoff, ehdr->e_shoff, ehdr->e_flags, ehdr->e_ehsize,
72	      ehdr->e_phentsize, ehdr->e_phnum, ehdr->e_shentsize,
73	      ehdr->e_shnum, ehdr->e_shstrndx);
74    }
75
76  ehdr->e_ident[0] = 42;
77  ehdr->e_ident[4] = 1;
78  ehdr->e_ident[5] = 1;
79  ehdr->e_ident[6] = 2;
80  ehdr->e_type = ET_EXEC;
81  ehdr->e_version = 1;
82  ehdr->e_ehsize = 1;
83  elf_flagehdr (elf, ELF_C_SET, ELF_F_DIRTY);
84
85  /* Create the program header.  */
86  phdr = elf32_newphdr (elf, 1);
87  if (phdr == NULL)
88    {
89      printf ("cannot create program header: %s\n", elf_errmsg (-1));
90      exit (1);
91    }
92
93  phdr[0].p_type = PT_PHDR;
94  elf_flagphdr (elf, ELF_C_SET, ELF_F_DIRTY);
95
96  /* Let the library compute the internal structure information.  */
97  if (elf_update (elf, ELF_C_NULL) < 0)
98    {
99      printf ("failure in elf_update(NULL): %s\n", elf_errmsg (-1));
100      exit (1);
101    }
102
103  ehdr = elf32_getehdr (elf);
104
105  phdr[0].p_offset = ehdr->e_phoff;
106  phdr[0].p_offset = ehdr->e_phoff;
107  phdr[0].p_vaddr = ehdr->e_phoff;
108  phdr[0].p_paddr = ehdr->e_phoff;
109  phdr[0].p_flags = PF_R | PF_X;
110  phdr[0].p_filesz = ehdr->e_phnum * elf32_fsize (ELF_T_PHDR, 1, EV_CURRENT);
111  phdr[0].p_memsz = ehdr->e_phnum * elf32_fsize (ELF_T_PHDR, 1, EV_CURRENT);
112  phdr[0].p_align = sizeof (Elf32_Word);
113
114  /* Write out the file.  */
115  if (elf_update (elf, ELF_C_WRITE) < 0)
116    {
117      printf ("failure in elf_update(WRITE): %s\n", elf_errmsg (-1));
118      exit (1);
119    }
120
121  /* Print the ELF header values.  */
122  if (argc > 1)
123    {
124      for (i = 0; i < EI_NIDENT; ++i)
125	printf (" %02x", ehdr->e_ident[i]);
126      printf ("\
127\ntype = %hu\nmachine = %hu\nversion = %u\nentry = %u\nphoff = %u\n"
128	      "shoff = %u\nflags = %u\nehsize = %hu\nphentsize = %hu\n"
129	      "phnum = %hu\nshentsize = %hu\nshnum = %hu\nshstrndx = %hu\n",
130	      ehdr->e_type, ehdr->e_machine, ehdr->e_version, ehdr->e_entry,
131	      ehdr->e_phoff, ehdr->e_shoff, ehdr->e_flags, ehdr->e_ehsize,
132	      ehdr->e_phentsize, ehdr->e_phnum, ehdr->e_shentsize,
133	      ehdr->e_shnum, ehdr->e_shstrndx);
134    }
135
136  if (elf_end (elf) != 0)
137    {
138      printf ("failure in elf_end: %s\n", elf_errmsg (-1));
139      exit (1);
140    }
141
142  return 0;
143}
144