1 /* Get move structure at the given index.
2 Copyright (C) 2000, 2001, 2002 Red Hat, Inc.
3 Written by Ulrich Drepper <drepper@redhat.com>, 2000.
4
5 This program 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, version 2.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software Foundation,
16 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
17
18 #ifdef HAVE_CONFIG_H
19 # include <config.h>
20 #endif
21
22 #include <assert.h>
23 #include <gelf.h>
24 #include <stddef.h>
25
26 #include "libelfP.h"
27
28
29 GElf_Move *
gelf_getmove(data,ndx,dst)30 gelf_getmove (data, ndx, dst)
31 Elf_Data *data;
32 int ndx;
33 GElf_Move *dst;
34 {
35 GElf_Move *result = NULL;
36 Elf *elf;
37
38 if (data == NULL)
39 return NULL;
40
41 if (unlikely (data->d_type != ELF_T_MOVE))
42 {
43 __libelf_seterrno (ELF_E_INVALID_HANDLE);
44 return NULL;
45 }
46
47 /* The types for 32 and 64 bit are the same. Lucky us. */
48 assert (sizeof (GElf_Move) == sizeof (Elf32_Move));
49 assert (sizeof (GElf_Move) == sizeof (Elf64_Move));
50
51 /* The data is already in the correct form. Just make sure the
52 index is OK. */
53 if (unlikely ((ndx + 1) * sizeof (GElf_Move) > data->d_size))
54 {
55 __libelf_seterrno (ELF_E_INVALID_INDEX);
56 goto out;
57 }
58
59 elf = ((Elf_Data_Scn *) data)->s->elf;
60 rwlock_rdlock (elf->lock);
61
62 *dst = ((GElf_Move *) data->d_buf)[ndx];
63
64 rwlock_unlock (elf->lock);
65
66 result = dst;
67
68 out:
69 return result;
70 }
71