blob: a6e1753ddfcf7e382681bd6cca52cf72697e9527 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
/* rawmemchr - find a character in a memory zone
Copyright (C) 2015-2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */
#include <sysdep.h>
/* Special case rawmemchr (s, 0) as strlen, otherwise tailcall memchr.
Call strlen without setting up a full frame - it preserves x14/x15.
*/
ENTRY (__rawmemchr)
cbz w1, L(do_strlen)
mov x2, -1
b __memchr
L(do_strlen):
mov x15, x30
cfi_return_column (x15)
mov x14, x0
bl __strlen
add x0, x14, x0
ret x15
END (__rawmemchr)
weak_alias (__rawmemchr, rawmemchr)
libc_hidden_builtin_def (__rawmemchr)
|
