minix/lib/libc/arch/m68k/sys/__vfork14.S
Lionel Sambuc 84d9c625bf Synchronize on NetBSD-CVS (2013/12/1 12:00:00 UTC)
- Fix for possible unset uid/gid in toproto
 - Fix for default mtree style
 - Update libelf
 - Importing libexecinfo
 - Resynchronize GCC, mpc, gmp, mpfr
 - build.sh: Replace params with show-params.
     This has been done as the make target has been renamed in the same
     way, while a new target named params has been added. This new
     target generates a file containing all the parameters, instead of
     printing it on the console.
 - Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
     get getservbyport() out of the inner loop

Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
2014-07-28 17:05:06 +02:00

94 lines
3 KiB
ArmAsm

/* $NetBSD: __vfork14.S,v 1.12 2013/09/12 15:36:15 joerg Exp $ */
/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* 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(LIBC_SCCS) && !defined(lint)
#if 0
RCSID("from: @(#)Ovfork.s 5.1 (Berkeley) 5/12/90")
#else
RCSID("$NetBSD: __vfork14.S,v 1.12 2013/09/12 15:36:15 joerg Exp $")
#endif
#endif /* LIBC_SCCS and not lint */
/*
* @(#)vfork.s 4.1 (Berkeley) 12/21/80
* C library -- vfork
*/
/*
* pid = vfork();
*
* d1 == 0 in parent process, d1 == 1 in child process.
* d0 == pid of child in parent, d0 == pid of parent in child.
*
* trickery here, due to keith sklower, uses ret to clear the stack,
* and then returns with a jump indirect, since only one person can return
* with a ret off this stack... we do the ret before we vfork!
*/
ENTRY(__vfork14)
movl (%sp)+,%a1
SYSTRAP(__vfork14)
jcs err
subql #1,%d1 /* from 1 to 0 in child, 0 to -1 in parent */
andl %d1,%d0
jmp (%a1)
err:
#ifdef _REENTRANT
.globl _C_LABEL(__errno)
movl %a1,-(%sp)
movl %d0,-(%sp)
jbsr PIC_PLT(_C_LABEL(__errno))
#ifdef __SVR4_ABI__
movl (%sp)+,(%a0)
#else
movl %d0,%a1
movl (%sp)+,(%a1)
#endif
movl (%sp)+,%a1
#else
#ifdef __PIC__
GOT_SETUP(%a0)
movl _C_LABEL(errno)@GOT:w(%a0),%a0
movl %d0,(%a0)
#else
.globl _C_LABEL(errno)
movl %d0,_C_LABEL(errno)
#endif /* __PIC__ */
#endif /* _REENTRANT */
moveq #-1,%d0
jmp (%a1)
END(__vfork14)