11541Srgrimes/* $NetBSD: alloca.S,v 1.3 2003/04/05 23:08:51 bjh21 Exp $ */ 21541Srgrimes 31541Srgrimes/* 41541Srgrimes * Copyright (c) 1995 Mark Brinicombe 51541Srgrimes * All rights reserved. 61541Srgrimes * 71541Srgrimes * Redistribution and use in source and binary forms, with or without 81541Srgrimes * modification, are permitted provided that the following conditions 91541Srgrimes * are met: 101541Srgrimes * 1. Redistributions of source code must retain the above copyright 111541Srgrimes * notice, this list of conditions and the following disclaimer. 121541Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 131541Srgrimes * notice, this list of conditions and the following disclaimer in the 141541Srgrimes * documentation and/or other materials provided with the distribution. 151541Srgrimes * 3. All advertising materials mentioning features or use of this software 161541Srgrimes * must display the following acknowledgement: 171541Srgrimes * This product includes software developed by Mark Brinicombe 181541Srgrimes * 4. Neither the name of the University nor the names of its contributors 191541Srgrimes * may be used to endorse or promote products derived from this software 201541Srgrimes * without specific prior written permission. 211541Srgrimes * 221541Srgrimes * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 231541Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 241541Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 251541Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 261541Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 271541Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 281541Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 291541Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 301541Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 311541Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 321541Srgrimes * SUCH DAMAGE. 3314487Shsu */ 3425578Speter 351541Srgrimes/* like alloc, but automatic automatic free in return */ 361541Srgrimes 371541Srgrimes#include <machine/asm.h> 381541Srgrimes__FBSDID("$FreeBSD$"); 391541Srgrimes 4014487ShsuENTRY(alloca) 4114487Shsu add r0, r0, #0x00000007 /* round up to next 8 byte alignment */ 421541Srgrimes bic r0, r0, #0x00000007 431541Srgrimes sub sp, sp, r0 /* Adjust the stack pointer */ 441541Srgrimes mov r0, sp /* r0 = base of new space */ 451541Srgrimes RET 461541Srgrimes