1  /*-
 2   * Copyright (c) 2006,2008 Joseph Koshy
 3   * All rights reserved.
 4   *
 5   * Redistribution and use in source and binary forms, with or without
 6   * modification, are permitted provided that the following conditions
 7   * are met:
 8   * 1. Redistributions of source code must retain the above copyright
 9   *    notice, this list of conditions and the following disclaimer.
10   * 2. Redistributions in binary form must reproduce the above copyright
11   *    notice, this list of conditions and the following disclaimer in the
12   *    documentation and/or other materials provided with the distribution.
13   *
14   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17   * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24   * SUCH DAMAGE.
25   */
26  
27  #include <sys/cdefs.h>
28  
29  #include <gelf.h>
30  #include <libelf.h>
31  
32  #include "_libelf.h"
33  
34  ELFTC_VCSID("$Id$");
35  
36  void *
37  _libelf_getshdr(Elf_Scn *s, int ec)
38  {
39  	Elf *e;
40  
41  	if (s == NULL || (e = s->s_elf) == NULL ||
42  	    e->e_kind != ELF_K_ELF) {
43  		LIBELF_SET_ERROR(ARGUMENT, 0);
44  		return (NULL);
45  	}
46  
47  	if (ec == ELFCLASSNONE)
48  		ec = e->e_class;
49  
50  	if (ec != e->e_class) {
51  		LIBELF_SET_ERROR(CLASS, 0);
52  		return (NULL);
53  	}
54  
55  	return ((void *) &s->s_shdr);
56  }