2N/A/*
2N/A * CDDL HEADER START
2N/A *
2N/A * The contents of this file are subject to the terms of the
2N/A * Common Development and Distribution License (the "License").
2N/A * You may not use this file except in compliance with the License.
2N/A *
2N/A * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
2N/A * or http://www.opensolaris.org/os/licensing.
2N/A * See the License for the specific language governing permissions
2N/A * and limitations under the License.
2N/A *
2N/A * When distributing Covered Code, include this CDDL HEADER in each
2N/A * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
2N/A * If applicable, add the following below this CDDL HEADER, with the
2N/A * fields enclosed by brackets "[]" replaced with your own identifying
2N/A * information: Portions Copyright [yyyy] [name of copyright owner]
2N/A *
2N/A * CDDL HEADER END
2N/A */
2N/A/*
2N/A * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
2N/A * Use is subject to license terms.
2N/A */
2N/A
2N/A .file "alloca.s"
2N/A
2N/A#include "SYS.h"
2N/A
2N/A ENTRY(__builtin_alloca)
2N/A popl %ecx / grab our return address
2N/A movl (%esp),%eax / get argument
2N/A addl $3,%eax
2N/A andl $0xfffffffc,%eax / round up to multiple of 4
2N/A subl %eax,%esp / leave requested space on stack
2N/A leal 4(%esp),%eax / adjust, accounting for the "size" arg
2N/A pushl %ecx / put back return address
2N/A ret
2N/A SET_SIZE(__builtin_alloca)