1/*- 2 * Copyright (c) 2013 The NetBSD Foundation, Inc. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to The NetBSD Foundation 6 * by Matt Thomas of 3am Software Foundry. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 * POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30#include <machine/asm.h> 31 32RCSID("$NetBSD: strlcat_arm.S,v 1.1 2013/01/23 07:02:45 matt Exp $") 33 34/* LINTSTUB: size_t strlcat(char *, const char *, size_t) */ 35ENTRY(strlcat) 36 push {r4-r6, lr} 37 mov r4, r0 /* save dst */ 38 mov r5, r1 /* save src */ 39 mov r6, r2 /* save siz */ 40 41 mov r1, r6 /* get siz */ 42 bl PLT_SYM(strnlen) /* find length of dst (up to siz) */ 43 44 sub r2, r6, r0 /* get remaining space in dst */ 45 mov r1, r5 /* restore src */ 46 mov r5, r0 /* save remaining space */ 47 add r0, r0, r4 /* set start to end of dst */ 48 bl PLT_SYM(strlcpy) /* attempt to copy src */ 49 add r0, r0, r5 /* add remaining to strlcpy return */ 50 pop {r4-r6, lr} /* restore registers */ 51 RET /* return */ 52END(strlcat) 53