Line data Source code
1 : /* Get next section.
2 : Copyright (C) 1998, 1999, 2000, 2001, 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 <assert.h>
35 : #include <libelf.h>
36 : #include <stddef.h>
37 :
38 : #include "libelfP.h"
39 :
40 :
41 : Elf_Scn *
42 8522065 : elf_nextscn (Elf *elf, Elf_Scn *scn)
43 : {
44 : Elf_ScnList *list;
45 8522065 : Elf_Scn *result = NULL;
46 :
47 8522065 : if (elf == NULL)
48 : return NULL;
49 :
50 : rwlock_rdlock (elf->lock);
51 :
52 8522065 : if (scn == NULL)
53 : {
54 : /* If no section handle is given return the first (not 0th) section.
55 : Set scn to the 0th section and perform nextscn. */
56 : if (elf->class == ELFCLASS32
57 : || (offsetof (Elf, state.elf32.scns)
58 : == offsetof (Elf, state.elf64.scns)))
59 1135303 : list = &elf->state.elf32.scns;
60 : else
61 : list = &elf->state.elf64.scns;
62 :
63 1135303 : scn = &list->data[0];
64 : }
65 : else
66 7386762 : list = scn->list;
67 :
68 8522065 : if (scn + 1 < &list->data[list->cnt])
69 : result = scn + 1;
70 9199 : else if (scn + 1 == &list->data[list->max]
71 8932 : && (list = list->next) != NULL)
72 : {
73 : /* If there is another element in the section list it must
74 : have at least one entry. */
75 289 : assert (list->cnt > 0);
76 289 : result = &list->data[0];
77 : }
78 :
79 : rwlock_unlock (elf->lock);
80 :
81 : return result;
82 : }
83 : INTDEF(elf_nextscn)
|