73 lines
2.6 KiB
ArmAsm
73 lines
2.6 KiB
ArmAsm
/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)Ovfork.s 5.1 (Berkeley) 4/23/90
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* $Id: Ovfork.S,v 1.7 1994/01/27 15:02:37 mycroft Exp $
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*/
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#if defined(SYSLIBC_SCCS) && !defined(lint)
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.text
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.asciz "$Id: Ovfork.S,v 1.7 1994/01/27 15:02:37 mycroft Exp $"
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#endif /* SYSLIBC_SCCS and not lint */
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#include "SYS.h"
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/*
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* pid = vfork();
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*
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* %edx == 0 in parent process, %edx == 1 in child process.
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* %eax == pid of child in parent, %eax == pid of parent in child.
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*
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*/
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ENTRY(vfork)
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popl %ecx /* my rta into ecx */
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movl $(SYS_vfork),%eax
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LCALL(7,0)
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jc err
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decl %edx
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andl %edx,%eax
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jmp %ecx
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err:
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#ifdef PIC
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PIC_PROLOGUE
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movl PIC_GOT(_errno),%edx
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PIC_EPILOGUE
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movl %eax,(%edx)
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#else
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movl %eax,_errno
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#endif
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movl $-1,%eax
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jmp %ecx
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