1 /* Copyright (C) 1999, 2000, 2001, 2002, 2005 Red Hat, Inc.
2 This file is part of elfutils.
3 Written by Ulrich Drepper <drepper@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
print_ehdr(Elf32_Ehdr * ehdr)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
main(int argc,char * argv[])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