Line data Source code
1 : /* Return section header.
2 : Copyright (C) 1998, 1999, 2000, 2002, 2015 Red Hat, Inc.
3 : This file is part of elfutils.
4 : Written 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 <gelf.h>
35 : #include <string.h>
36 :
37 : #include "libelfP.h"
38 :
39 :
40 : GElf_Shdr *
41 913500171 : gelf_getshdr (Elf_Scn *scn, GElf_Shdr *dst)
42 : {
43 913500171 : GElf_Shdr *result = NULL;
44 :
45 913500171 : if (scn == NULL)
46 : return NULL;
47 :
48 913499808 : if (dst == NULL)
49 : {
50 0 : __libelf_seterrno (ELF_E_INVALID_OPERAND);
51 0 : return NULL;
52 : }
53 :
54 913499808 : rwlock_rdlock (scn->elf->lock);
55 :
56 913499808 : if (scn->elf->class == ELFCLASS32)
57 : {
58 : /* Copy the elements one-by-one. */
59 12965302 : Elf32_Shdr *shdr
60 6482651 : = scn->shdr.e32 ?: __elf32_getshdr_rdlock (scn);
61 :
62 6482651 : if (shdr == NULL)
63 : {
64 0 : __libelf_seterrno (ELF_E_INVALID_OPERAND);
65 0 : goto out;
66 : }
67 :
68 : #define COPY(name) \
69 : dst->name = shdr->name
70 6482651 : COPY (sh_name);
71 6482651 : COPY (sh_type);
72 6482651 : COPY (sh_flags);
73 6482651 : COPY (sh_addr);
74 6482651 : COPY (sh_offset);
75 6482651 : COPY (sh_size);
76 6482651 : COPY (sh_link);
77 6482651 : COPY (sh_info);
78 6482651 : COPY (sh_addralign);
79 6482651 : COPY (sh_entsize);
80 :
81 6482651 : result = dst;
82 : }
83 : else
84 : {
85 1814034314 : Elf64_Shdr *shdr
86 907017157 : = scn->shdr.e64 ?: __elf64_getshdr_rdlock (scn);
87 :
88 907017157 : if (shdr == NULL)
89 : {
90 0 : __libelf_seterrno (ELF_E_INVALID_OPERAND);
91 0 : goto out;
92 : }
93 :
94 : /* We only have to copy the data. */
95 1814034314 : result = memcpy (dst, shdr, sizeof (GElf_Shdr));
96 : }
97 :
98 913499808 : out:
99 913499808 : rwlock_unlock (scn->elf->lock);
100 :
101 913499808 : return result;
102 : }
103 : INTDEF(gelf_getshdr)
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