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/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "SYS.h"
#if defined(SYSLIBC_SCCS)
.text
.asciz "$OpenBSD: Ovfork.S,v 1.5 2003/06/02 20:18:30 millert Exp $"
#endif /* SYSLIB_SCCS */
/*
* pid = vfork();
*
* %edx == 0 in parent process, %edx == 1 in child process.
* %eax == pid of child in parent, %eax == pid of parent in child.
*
*/
SYSENTRY(vfork)
popl %ecx /* my rta into ecx */
movl $(SYS_vfork),%eax
int $0x80
jc err
decl %edx
andl %edx,%eax
jmp *%ecx
err:
#ifdef PIC
PIC_PROLOGUE
movl PIC_GOT(_C_LABEL(errno)),%edx
PIC_EPILOGUE
movl %eax,(%edx)
#else
movl %eax,_C_LABEL(errno)
#endif
movl $-1,%eax
jmp *%ecx
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