mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-14 17:11:06 +00:00
43 lines
1.2 KiB
ArmAsm
43 lines
1.2 KiB
ArmAsm
/* rawmemchr - find a character in a memory zone
|
|
|
|
Copyright (C) 2015-2023 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
|
|
<https://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)
|