1 /* $Id: strncpy_user.S,v 1.3 1999/08/21 22:19:11 ralf Exp $
3 * This file is subject to the terms and conditions of the GNU General Public
4 * License. See the file "COPYING" in the main directory of this archive
7 * Copyright (c) 1996, 1999 by Ralf Baechle
9 #include <linux/errno.h>
11 #include <asm/offset.h>
12 #include <asm/regdef.h>
14 #define EX(insn,reg,addr,handler) \
16 .section __ex_table,"a"; \
21 * Returns: -EFAULT if exception before terminator, N if the entire
22 * buffer filled, else strlen.
26 * Ugly special case have to check: we might get passed a user space
27 * pointer which wraps into the kernel space. We don't deal with that. If
28 * it happens at most some bytes of the exceptions handlers will be copied.
31 LEAF(__strncpy_from_user_asm)
32 lw v0, THREAD_CURDS($28) # pointer ok?
36 EXPORT(__strncpy_from_user_nocheck_asm)
40 1: EX(lbu, t0, (v1), fault)
52 END(__strncpy_from_user_asm)
57 .section __ex_table,"a"