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
39Elf_Data *
40elf_rawdata (Elf_Scn *scn, Elf_Data *data)
41{
42  if (scn == NULL || scn->elf->kind != ELF_K_ELF)
43    {
44      __libelf_seterrno (ELF_E_INVALID_HANDLE);
45      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  if (data != NULL
54      || (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      __libelf_seterrno (ELF_E_DATA_MISMATCH);
59      return NULL;
60    }
61
62  /* If the data for this section was not yet initialized do it now.  */
63  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      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  return &scn->rawdata.d;
75}
76INTDEF(elf_rawdata)
77