Line data Source code
1 : /* Conversion functions for notes.
2 : Copyright (C) 2007, 2009, 2014 Red Hat, Inc.
3 : This file is part of elfutils.
4 :
5 : This file is free software; you can redistribute it and/or modify
6 : it under the terms of either
7 :
8 : * the GNU Lesser General Public License as published by the Free
9 : Software Foundation; either version 3 of the License, or (at
10 : your option) any later version
11 :
12 : or
13 :
14 : * the GNU General Public License as published by the Free
15 : Software Foundation; either version 2 of the License, or (at
16 : your option) any later version
17 :
18 : or both in parallel, as here.
19 :
20 : elfutils is distributed in the hope that it will be useful, but
21 : WITHOUT ANY WARRANTY; without even the implied warranty of
22 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
23 : General Public License for more details.
24 :
25 : You should have received copies of the GNU General Public License and
26 : the GNU Lesser General Public License along with this program. If
27 : not, see <http://www.gnu.org/licenses/>. */
28 :
29 : static void
30 291 : elf_cvt_note (void *dest, const void *src, size_t len, int encode)
31 : {
32 : assert (sizeof (Elf32_Nhdr) == sizeof (Elf64_Nhdr));
33 :
34 1016 : while (len >= sizeof (Elf32_Nhdr))
35 : {
36 434 : (1 ? Elf32_cvt_Nhdr : Elf64_cvt_Nhdr) (dest, src, sizeof (Elf32_Nhdr),
37 : encode);
38 434 : const Elf32_Nhdr *n = encode ? src : dest;
39 434 : Elf32_Word namesz = NOTE_ALIGN (n->n_namesz);
40 434 : Elf32_Word descsz = NOTE_ALIGN (n->n_descsz);
41 :
42 434 : len -= sizeof *n;
43 434 : src += sizeof *n;
44 434 : dest += sizeof *n;
45 :
46 434 : if (namesz > len)
47 : break;
48 434 : len -= namesz;
49 434 : if (descsz > len)
50 : break;
51 434 : len -= descsz;
52 :
53 434 : if (src != dest)
54 432 : memcpy (dest, src, namesz + descsz);
55 :
56 434 : src += namesz + descsz;
57 434 : dest += namesz + descsz;
58 : }
59 :
60 : /* Copy opver any leftover data unconcerted. Probably part of
61 : truncated name/desc data. */
62 291 : if (unlikely (len > 0) && src != dest)
63 0 : memcpy (dest, src, len);
64 291 : }
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