Branch data 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 : 11286965 : elf_nextscn (Elf *elf, Elf_Scn *scn)
43 : : {
44 : 11286965 : Elf_ScnList *list;
45 : 11286965 : Elf_Scn *result = NULL;
46 : :
47 [ + - ]: 11286965 : if (elf == NULL)
48 : : return NULL;
49 : :
50 : 11286965 : rwlock_rdlock (elf->lock);
51 : :
52 [ + + ]: 11286965 : 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 : 40946 : if (elf->class == ELFCLASS32
57 : : || (offsetof (Elf, state.elf32.scns)
58 : : == offsetof (Elf, state.elf64.scns)))
59 : 40946 : list = &elf->state.elf32.scns;
60 : : else
61 : : list = &elf->state.elf64.scns;
62 : :
63 : 40946 : scn = &list->data[0];
64 : : }
65 : : else
66 : 11246019 : list = scn->list;
67 : :
68 [ + + ]: 11286965 : if (scn + 1 < &list->data[list->cnt])
69 : : result = scn + 1;
70 [ + + ]: 25832 : else if (scn + 1 == &list->data[list->max]
71 [ + + ]: 24832 : && (list = list->next) != NULL)
72 : : {
73 : : /* If there is another element in the section list it must
74 : : have at least one entry. */
75 [ - + ]: 790 : assert (list->cnt > 0);
76 : 790 : result = &list->data[0];
77 : : }
78 : :
79 : : rwlock_unlock (elf->lock);
80 : :
81 : : return result;
82 : : }
83 : : INTDEF(elf_nextscn)
|