diff options
| author |   Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 12:17:53 -0700 |
|---|---|---|
| committer | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 15:44:42 -0700 |
| commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
| tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/unicore32/lib/strnlen_user.S | |
| parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) | |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/unicore32/lib/strnlen_user.S')
| -rw-r--r-- | kernel/arch/unicore32/lib/strnlen_user.S | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/kernel/arch/unicore32/lib/strnlen_user.S b/kernel/arch/unicore32/lib/strnlen_user.S new file mode 100644 index 000000000..75863030f --- /dev/null +++ b/kernel/arch/unicore32/lib/strnlen_user.S @@ -0,0 +1,42 @@ +/* + * linux/arch/unicore32/lib/strnlen_user.S + * + * Code specific to PKUnity SoC and UniCore ISA + * + * Copyright (C) 2001-2010 GUAN Xue-tao + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/linkage.h> +#include <asm/assembler.h> +#include <asm/errno.h> + + .text + .align 5 + +/* Prototype: unsigned long __strnlen_user(const char *str, long n) + * Purpose : get length of a string in user memory + * Params : str - address of string in user memory + * Returns : length of string *including terminator* + * or zero on exception, or n + 1 if too long + */ +ENTRY(__strnlen_user) + mov r2, r0 +1: + ldrusr r3, r0, 1 + cxor.a r3, #0 + beq 2f + sub.a r1, r1, #1 + bne 1b + add r0, r0, #1 +2: sub r0, r0, r2 + mov pc, lr +ENDPROC(__strnlen_user) + + .pushsection .fixup,"ax" + .align 0 +9001: mov r0, #0 + mov pc, lr + .popsection |