/src/elfutils/libelf/elf_rawdata.c
Line | Count | Source |
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 | | elf_rawdata (Elf_Scn *scn, Elf_Data *data) |
41 | 7.99k | { |
42 | 7.99k | if (scn == NULL || scn->elf->kind != ELF_K_ELF) |
43 | 0 | { |
44 | 0 | __libelf_seterrno (ELF_E_INVALID_HANDLE); |
45 | 0 | return NULL; |
46 | 0 | } |
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 | 7.99k | if (data != NULL |
54 | 7.99k | || (scn->data_read != 0 && (scn->flags & ELF_F_FILEDATA) == 0)) |
55 | 0 | { |
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 | 0 | } |
61 | | |
62 | | /* If the data for this section was not yet initialized do it now. */ |
63 | 7.99k | if (scn->data_read == 0) |
64 | 4.31k | { |
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 | 4.31k | if (__libelf_set_rawdata (scn) != 0) |
69 | | /* Something went wrong. The error value is already set. */ |
70 | 81 | return NULL; |
71 | 4.31k | } |
72 | | |
73 | | /* Return the first data element in the list. */ |
74 | 7.91k | return &scn->rawdata.d; |
75 | 7.99k | } |
76 | | INTDEF(elf_rawdata) |