1 /* Update additional required symbol version information.
2 Copyright (C) 2001, 2002 Red Hat, Inc.
3 Written by Ulrich Drepper <drepper@redhat.com>, 2001.
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 <string.h>
25
26 #include "libelfP.h"
27
28
29 int
gelf_update_vernaux(data,offset,src)30 gelf_update_vernaux (data, offset, src)
31 Elf_Data *data;
32 int offset;
33 GElf_Vernaux *src;
34 {
35 Elf_Data_Scn *data_scn = (Elf_Data_Scn *) data;
36
37 if (data == NULL)
38 return 0;
39
40 /* The types for 32 and 64 bit are the same. Lucky us. */
41 assert (sizeof (GElf_Vernaux) == sizeof (Elf32_Vernaux));
42 assert (sizeof (GElf_Vernaux) == sizeof (Elf64_Vernaux));
43
44 /* Check whether we have to resize the data buffer. */
45 if (unlikely (offset < 0)
46 || unlikely ((offset + sizeof (GElf_Vernaux)) > data_scn->d.d_size))
47 {
48 __libelf_seterrno (ELF_E_INVALID_INDEX);
49 return 0;
50 }
51
52 if (unlikely (data_scn->d.d_type != ELF_T_VNEED))
53 {
54 /* The type of the data better should match. */
55 __libelf_seterrno (ELF_E_DATA_MISMATCH);
56 return 0;
57 }
58
59 rwlock_wrlock (data_scn->s->elf->lock);
60
61 memcpy ((char *) data_scn->d.d_buf + offset, src, sizeof (GElf_Vernaux));
62
63 /* Mark the section as modified. */
64 data_scn->s->flags |= ELF_F_DIRTY;
65
66 rwlock_unlock (data_scn->s->elf->lock);
67
68 return 1;
69 }
70