strcat.S revision 1.1.4.2
1 1.1.4.2 tls /* $NetBSD: strcat.S,v 1.1.4.2 2014/08/19 23:45:12 tls Exp $ */ 2 1.1.4.2 tls 3 1.1.4.2 tls /*- 4 1.1.4.2 tls * Copyright (c) 2014 The NetBSD Foundation, Inc. 5 1.1.4.2 tls * All rights reserved. 6 1.1.4.2 tls * 7 1.1.4.2 tls * This code is derived from software contributed to The NetBSD Foundation 8 1.1.4.2 tls * by Matt Thomas of 3am Software Foundry. 9 1.1.4.2 tls * 10 1.1.4.2 tls * Redistribution and use in source and binary forms, with or without 11 1.1.4.2 tls * modification, are permitted provided that the following conditions 12 1.1.4.2 tls * are met: 13 1.1.4.2 tls * 1. Redistributions of source code must retain the above copyright 14 1.1.4.2 tls * notice, this list of conditions and the following disclaimer. 15 1.1.4.2 tls * 2. Redistributions in binary form must reproduce the above copyright 16 1.1.4.2 tls * notice, this list of conditions and the following disclaimer in the 17 1.1.4.2 tls * documentation and/or other materials provided with the distribution. 18 1.1.4.2 tls * 19 1.1.4.2 tls * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.1.4.2 tls * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.1.4.2 tls * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.1.4.2 tls * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.1.4.2 tls * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.1.4.2 tls * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.1.4.2 tls * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.1.4.2 tls * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.1.4.2 tls * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.1.4.2 tls * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.1.4.2 tls * POSSIBILITY OF SUCH DAMAGE. 30 1.1.4.2 tls */ 31 1.1.4.2 tls 32 1.1.4.2 tls #include <machine/asm.h> 33 1.1.4.2 tls 34 1.1.4.2 tls RCSID("$NetBSD: strcat.S,v 1.1.4.2 2014/08/19 23:45:12 tls Exp $") 35 1.1.4.2 tls 36 1.1.4.2 tls /* 37 1.1.4.2 tls * Implementation of strcat using strlen/strcpy. 38 1.1.4.2 tls */ 39 1.1.4.2 tls ENTRY(strcat) 40 1.1.4.2 tls stp x29, x30, [sp, #-32]! /* save fp, lr */ 41 1.1.4.2 tls mov x29, sp /* init fp */ 42 1.1.4.2 tls stp x27, x28, [x29, #16] /* save registers */ 43 1.1.4.2 tls 44 1.1.4.2 tls mov x27, x0 /* save dst */ 45 1.1.4.2 tls mov x28, x1 /* save append */ 46 1.1.4.2 tls 47 1.1.4.2 tls bl _C_LABEL(strlen) /* find length of dst */ 48 1.1.4.2 tls 49 1.1.4.2 tls add x0, x0, x27 /* add to dst pointer */ 50 1.1.4.2 tls mov x1, x28 /* fetch append */ 51 1.1.4.2 tls bl _C_LABEL(strcpy) /* append string */ 52 1.1.4.2 tls 53 1.1.4.2 tls mov x0, x27 /* restore dst as return value */ 54 1.1.4.2 tls ldp x27, x28, [x29, #16] /* save registers */ 55 1.1.4.2 tls ldp x29, x30, [sp], #32 /* save fp, lr; pop stack */ 56 1.1.4.2 tls ret 57 1.1.4.2 tls END(strcat) 58
Indexes created Thu Oct 02 07:10:07 GMT 2025