/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * 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. */ .file "alloca.s" #include "SYS.h" ENTRY(__builtin_alloca) popq %rcx /* grab our return address */ addq $15, %rdi /* round size up to multiple of 16 */ andq $0xfffffffffffffff0, %rdi subq %rdi, %rsp /* allocate requested space on stack */ movq %rsp, %rax /* pointer to new memory block */ jmp *%rcx /* return */ SET_SIZE(__builtin_alloca)