1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22/* 23 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 .file "forkx.s" 28 29#include "SYS.h" 30 31/* 32 * pid = __forkx(flags); 33 * 34 * syscall trap: forksys(0, flags) 35 * 36 * From the syscall: 37 * %edx == 0 in parent process, %edx = 1 in child process. 38 * %eax == pid of child in parent, %eax == pid of parent in child. 39 * 40 * The child gets a zero return value. 41 * The parent gets the pid of the child. 42 */ 43 44 ENTRY(__forkx) 45 movl %edi, %esi 46 xorl %edi, %edi 47 SYSTRAP_2RVALS(forksys) 48 SYSCERROR 49 testl %edx, %edx 50 jz 1f /* jump if parent */ 51 xorl %eax, %eax /* child, return (0) */ 521: 53 RET 54 SET_SIZE(__forkx) 55