1 /* Update library in table at the given index.
2 Copyright (C) 2004 Red Hat, Inc.
3 Written by Ulrich Drepper <drepper@redhat.com>, 2004.
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 <gelf.h>
23 #include <stdlib.h>
24 #include <string.h>
25
26 #include "libelfP.h"
27
28
29 int
gelf_update_lib(data,ndx,src)30 gelf_update_lib (data, ndx, src)
31 Elf_Data *data;
32 int ndx;
33 GElf_Lib *src;
34 {
35 if (data == NULL)
36 return 0;
37
38 if (unlikely (ndx < 0))
39 {
40 __libelf_seterrno (ELF_E_INVALID_INDEX);
41 return 0;
42 }
43
44 Elf_Data_Scn *data_scn = (Elf_Data_Scn *) data;
45 if (unlikely (data_scn->d.d_type != ELF_T_LIB))
46 {
47 /* The type of the data better should match. */
48 __libelf_seterrno (ELF_E_DATA_MISMATCH);
49 return 0;
50 }
51
52 Elf_Scn *scn = data_scn->s;
53 rwlock_wrlock (scn->elf->lock);
54
55 /* Check whether we have to resize the data buffer. */
56 int result = 0;
57 if (unlikely ((ndx + 1) * sizeof (Elf64_Lib) > data_scn->d.d_size))
58 __libelf_seterrno (ELF_E_INVALID_INDEX);
59 else
60 {
61 ((Elf64_Lib *) data_scn->d.d_buf)[ndx] = *src;
62
63 result = 1;
64
65 /* Mark the section as modified. */
66 scn->flags |= ELF_F_DIRTY;
67 }
68
69 rwlock_unlock (scn->elf->lock);
70
71 return result;
72 }
73