Line data Source code
1 : /* Return raw section content.
2 : Copyright (C) 1998, 1999, 2000, 2002, 2015 Red Hat, Inc.
3 : This file is part of elfutils.
4 : Contributed by Ulrich Drepper <drepper@redhat.com>, 1998.
5 :
6 : This file is free software; you can redistribute it and/or modify
7 : it under the terms of either
8 :
9 : * the GNU Lesser General Public License as published by the Free
10 : Software Foundation; either version 3 of the License, or (at
11 : your option) any later version
12 :
13 : or
14 :
15 : * the GNU General Public License as published by the Free
16 : Software Foundation; either version 2 of the License, or (at
17 : your option) any later version
18 :
19 : or both in parallel, as here.
20 :
21 : elfutils is distributed in the hope that it will be useful, but
22 : WITHOUT ANY WARRANTY; without even the implied warranty of
23 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
24 : General Public License for more details.
25 :
26 : You should have received copies of the GNU General Public License and
27 : the GNU Lesser General Public License along with this program. If
28 : not, see <http://www.gnu.org/licenses/>. */
29 :
30 : #ifdef HAVE_CONFIG_H
31 : # include <config.h>
32 : #endif
33 :
34 : #include <stdlib.h>
35 :
36 : #include "libelfP.h"
37 :
38 :
39 : Elf_Data *
40 1146 : elf_rawdata (Elf_Scn *scn, Elf_Data *data)
41 : {
42 1146 : if (scn == NULL || scn->elf->kind != ELF_K_ELF)
43 : {
44 0 : __libelf_seterrno (ELF_E_INVALID_HANDLE);
45 0 : return NULL;
46 : }
47 :
48 : /* If `data' is not NULL this means we are not addressing the initial
49 : data in the file. But this also means this data is already read
50 : (since otherwise it is not possible to have a valid `data' pointer)
51 : and all the data structures are initialized as well. In this case
52 : we can simply walk the list of data records. */
53 1146 : if (data != NULL
54 1146 : || (scn->data_read != 0 && (scn->flags & ELF_F_FILEDATA) == 0))
55 : {
56 : /* We don't allow accessing any but the data read from the file
57 : as raw. */
58 0 : __libelf_seterrno (ELF_E_DATA_MISMATCH);
59 0 : return NULL;
60 : }
61 :
62 : /* If the data for this section was not yet initialized do it now. */
63 1146 : if (scn->data_read == 0)
64 : {
65 : /* First thing we do is to read the data from the file. There is
66 : always a file (or memory region) associated with this descriptor
67 : since otherwise the `data_read' flag would be set. */
68 1019 : if (__libelf_set_rawdata (scn) != 0)
69 : /* Something went wrong. The error value is already set. */
70 : return NULL;
71 : }
72 :
73 : /* Return the first data element in the list. */
74 1146 : return &scn->rawdata.d;
75 : }
76 : INTDEF(elf_rawdata)
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