1129202Scognet/* $NetBSD: alloca.S,v 1.3 2003/04/05 23:08:51 bjh21 Exp $ */ 2129202Scognet 3129202Scognet/* 4129202Scognet * Copyright (c) 1995 Mark Brinicombe 5129202Scognet * All rights reserved. 6129202Scognet * 7129202Scognet * Redistribution and use in source and binary forms, with or without 8129202Scognet * modification, are permitted provided that the following conditions 9129202Scognet * are met: 10129202Scognet * 1. Redistributions of source code must retain the above copyright 11129202Scognet * notice, this list of conditions and the following disclaimer. 12129202Scognet * 2. Redistributions in binary form must reproduce the above copyright 13129202Scognet * notice, this list of conditions and the following disclaimer in the 14129202Scognet * documentation and/or other materials provided with the distribution. 15129202Scognet * 3. All advertising materials mentioning features or use of this software 16129202Scognet * must display the following acknowledgement: 17129202Scognet * This product includes software developed by Mark Brinicombe 18129202Scognet * 4. Neither the name of the University nor the names of its contributors 19129202Scognet * may be used to endorse or promote products derived from this software 20129202Scognet * without specific prior written permission. 21129202Scognet * 22129202Scognet * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 23129202Scognet * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24129202Scognet * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25129202Scognet * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 26129202Scognet * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27129202Scognet * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28129202Scognet * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29129202Scognet * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30129202Scognet * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31129202Scognet * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32129202Scognet * SUCH DAMAGE. 33129202Scognet */ 34129202Scognet 35129202Scognet/* like alloc, but automatic automatic free in return */ 36129202Scognet 37129202Scognet#include <machine/asm.h> 38129202Scognet__FBSDID("$FreeBSD$"); 39129202Scognet 40129202ScognetENTRY(alloca) 41129202Scognet add r0, r0, #0x00000007 /* round up to next 8 byte alignment */ 42129202Scognet bic r0, r0, #0x00000007 43129202Scognet sub sp, sp, r0 /* Adjust the stack pointer */ 44129202Scognet mov r0, sp /* r0 = base of new space */ 45137464Scognet RET 46271337SianEND(alloca) 47