Module Name: src Committed By: matt Date: Wed Jan 23 07:02:45 UTC 2013
Added Files: src/common/lib/libc/arch/arm/string: strlcat_arm.S Log Message: Add ARM assembly of strlcat which is implemented using (the ARM optimized) strnlen and strlcpy. To generate a diff of this commit: cvs rdiff -u -r0 -r1.1 src/common/lib/libc/arch/arm/string/strlcat_arm.S Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files.
Added files: Index: src/common/lib/libc/arch/arm/string/strlcat_arm.S diff -u /dev/null src/common/lib/libc/arch/arm/string/strlcat_arm.S:1.1 --- /dev/null Wed Jan 23 07:02:45 2013 +++ src/common/lib/libc/arch/arm/string/strlcat_arm.S Wed Jan 23 07:02:45 2013 @@ -0,0 +1,52 @@ +/*- + * Copyright (c) 2013 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Matt Thomas of 3am Software Foundry. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <machine/asm.h> + +RCSID("$NetBSD: strlcat_arm.S,v 1.1 2013/01/23 07:02:45 matt Exp $") + +/* LINTSTUB: size_t strlcat(char *, const char *, size_t) */ +ENTRY(strlcat) + push {r4-r6, lr} + mov r4, r0 /* save dst */ + mov r5, r1 /* save src */ + mov r6, r2 /* save siz */ + + mov r1, r6 /* get siz */ + bl PLT_SYM(strnlen) /* find length of dst (up to siz) */ + + sub r2, r6, r0 /* get remaining space in dst */ + mov r1, r5 /* restore src */ + mov r5, r0 /* save remaining space */ + add r0, r0, r4 /* set start to end of dst */ + bl PLT_SYM(strlcpy) /* attempt to copy src */ + add r0, r0, r5 /* add remaining to strlcpy return */ + pop {r4-r6, lr} /* restore registers */ + RET /* return */ +END(strlcat)