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/strncpy_from_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/strncpy_from_user.S')
| -rw-r--r-- | kernel/arch/unicore32/lib/strncpy_from_user.S | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/kernel/arch/unicore32/lib/strncpy_from_user.S b/kernel/arch/unicore32/lib/strncpy_from_user.S new file mode 100644 index 000000000..ff6c304d5 --- /dev/null +++ b/kernel/arch/unicore32/lib/strncpy_from_user.S @@ -0,0 +1,45 @@ +/* + * linux/arch/unicore32/lib/strncpy_from_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 + +/* + * Copy a string from user space to kernel space. + * r0 = dst, r1 = src, r2 = byte length + * returns the number of characters copied (strlen of copied string), + * -EFAULT on exception, or "len" if we fill the whole buffer + */ +ENTRY(__strncpy_from_user) + mov ip, r1 +1: sub.a r2, r2, #1 + ldrusr r3, r1, 1, ns + bfs 2f + stb.w r3, [r0]+, #1 + cxor.a r3, #0 + bne 1b + sub r1, r1, #1 @ take NUL character out of count +2: sub r0, r1, ip + mov pc, lr +ENDPROC(__strncpy_from_user) + + .pushsection .fixup,"ax" + .align 0 +9001: mov r3, #0 + stb r3, [r0+], #0 @ null terminate + mov r0, #-EFAULT + mov pc, lr + .popsection + |