__vfork14.S revision 1.7
11.7Sagc/* $NetBSD: __vfork14.S,v 1.7 2003/08/07 16:42:08 agc Exp $ */ 21.1Sthorpej 31.1Sthorpej/*- 41.1Sthorpej * Copyright (c) 1990 The Regents of the University of California. 51.1Sthorpej * All rights reserved. 61.1Sthorpej * 71.1Sthorpej * This code is derived from software contributed to Berkeley by 81.1Sthorpej * William Jolitz. 91.1Sthorpej * 101.1Sthorpej * Redistribution and use in source and binary forms, with or without 111.1Sthorpej * modification, are permitted provided that the following conditions 121.1Sthorpej * are met: 131.1Sthorpej * 1. Redistributions of source code must retain the above copyright 141.1Sthorpej * notice, this list of conditions and the following disclaimer. 151.1Sthorpej * 2. Redistributions in binary form must reproduce the above copyright 161.1Sthorpej * notice, this list of conditions and the following disclaimer in the 171.1Sthorpej * documentation and/or other materials provided with the distribution. 181.7Sagc * 3. Neither the name of the University nor the names of its contributors 191.1Sthorpej * may be used to endorse or promote products derived from this software 201.1Sthorpej * without specific prior written permission. 211.1Sthorpej * 221.1Sthorpej * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 231.1Sthorpej * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 241.1Sthorpej * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 251.1Sthorpej * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 261.1Sthorpej * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 271.1Sthorpej * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 281.1Sthorpej * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 291.1Sthorpej * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 301.1Sthorpej * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 311.1Sthorpej * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 321.1Sthorpej * SUCH DAMAGE. 331.1Sthorpej * 341.1Sthorpej * from: @(#)Ovfork.s 5.1 (Berkeley) 4/23/90 351.1Sthorpej */ 361.1Sthorpej 371.1Sthorpej#include <machine/asm.h> 381.1Sthorpej#if defined(SYSLIBC_SCCS) && !defined(lint) 391.7Sagc RCSID("$NetBSD: __vfork14.S,v 1.7 2003/08/07 16:42:08 agc Exp $") 401.1Sthorpej#endif /* SYSLIBC_SCCS and not lint */ 411.1Sthorpej 421.1Sthorpej#include "SYS.h" 431.1Sthorpej 441.1Sthorpej/* 451.1Sthorpej * pid = vfork(); 461.1Sthorpej * 471.1Sthorpej * %edx == 0 in parent process, %edx == 1 in child process. 481.1Sthorpej * %eax == pid of child in parent, %eax == pid of parent in child. 491.1Sthorpej * 501.1Sthorpej */ 511.1SthorpejENTRY(__vfork14) 521.1Sthorpej popl %ecx /* my rta into ecx */ 531.5Smycroft SYSTRAP(__vfork14) 541.1Sthorpej jc err 551.1Sthorpej decl %edx 561.1Sthorpej andl %edx,%eax 571.6Sross jmp *%ecx 581.1Sthorpejerr: 591.3Skleink pushl %ecx 601.3Skleink#ifdef PIC 611.3Skleink PIC_PROLOGUE 621.4Smycroft mov PIC_GOT(CERROR), %ecx 631.3Skleink PIC_EPILOGUE 641.6Sross jmp *%ecx 651.3Skleink#else 661.4Smycroft jmp CERROR 671.4Smycroft#endif 68