1130b656e5
This will make a number of things easier in the future, as well as (finally!) avoiding the Id-smashing problem which has plagued developers for so long. Boy, I'm glad we're not using sup anymore. This update would have been insane otherwise.
102 lines
2.9 KiB
ArmAsm
102 lines
2.9 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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* $FreeBSD$
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*/
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#if defined(SYSLIBC_RCS) && !defined(lint)
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.text
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.asciz "$FreeBSD$"
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#endif /* SYSLIBC_RCS and not lint */
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#include "DEFS.h"
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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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lea SYS_vfork,%eax
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KERNCALL
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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 CNAME(__error)
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.type CNAME(__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(CNAME(__error))
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#else
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call CNAME(__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 CNAME(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(CNAME(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,CNAME(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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