/*

 * CDDL HEADER START

 *

 * The contents of this file are subject to the terms of the

 *

 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE

 * or http://www.opensolaris.org/os/licensing.

 * See the License for the specific language governing permissions

 * and limitations under the License.

 *

 * When distributing Covered Code, include this CDDL HEADER in each

 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.

 * If applicable, add the following below this CDDL HEADER, with the

 * fields enclosed by brackets "[]" replaced with your own identifying

 * information: Portions Copyright [yyyy] [name of copyright owner]

 *

 * CDDL HEADER END

 */

/*

 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.

 * Use is subject to license terms.

 */

#include "SYS.h"

	ENTRY(__builtin_alloca)

	popl	%ecx			/ grab our return address

	movl	(%esp),%eax		/ get argument

	addl	$3,%eax

	andl	$0xfffffffc,%eax	/ round up to multiple of 4

	subl	%eax,%esp		/ leave requested space on stack

	leal	4(%esp),%eax		/ adjust, accounting for the "size" arg

	pushl	%ecx			/ put back return address

	ret

	SET_SIZE(__builtin_alloca)