104 lines
3.0 KiB
ArmAsm
104 lines
3.0 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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* $Id: Ovfork.S,v 1.2 1995/01/23 01:29:37 davidg Exp $
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*/
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#if defined(SYSLIBC_RCS) && !defined(lint)
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.text
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.asciz "$Id: Ovfork.S,v 1.2 1995/01/23 01:29:37 davidg Exp $"
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#endif /* SYSLIBC_RCS 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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.set vfork,66
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.globl _vfork
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.type _vfork,@function
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_vfork:
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popl %ecx /* my rta into ecx */
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movl $vfork, %eax
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LCALL(7,0)
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jb verror
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vforkok:
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cmpl $0,%edx /* child process? */
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jne child /* yes */
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jmp parent
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#ifdef _THREAD_SAFE
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/*
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* Threaded version using __error().
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*/
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.globl ___error
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.type ___error,@function
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verror:
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pushl %eax
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#ifdef PIC
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call PIC_PLT(___error)
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#else
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call ___error
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#endif
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popl %ecx
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movl %ecx,(%eax)
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movl $-1,%eax
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movl $-1,%edx
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#else /* !_THREAD_SAFE */
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/*
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* Non-threaded version using global errno.
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*/
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.globl _errno
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verror:
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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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movl %eax,(%edx)
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PIC_EPILOGUE
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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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#endif /* !_THREAD_SAFE */
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jmp %ecx
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child:
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movl $0,%eax
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parent:
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jmp %ecx
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