77 lines
2.3 KiB
ArmAsm
77 lines
2.3 KiB
ArmAsm
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/* $NetBSD: __clone.S,v 1.3 2008/04/28 20:22:58 martin Exp $ */
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/*-
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* Copyright (c) 2001 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Matt Thomas <matt@3am-software.com>
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/errno.h>
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#include "SYS.h"
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#ifdef WEAK_ALIAS
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WEAK_ALIAS(clone, __clone)
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#endif
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/*
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* int __clone(int (*fn)(void *), void *stack, int flags, void *arg);
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*/
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ENTRY(__clone, 0)
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/*
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* Sanity checks: func and stack may not be NULL.
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*/
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movl 4(%ap),%r2 /* check and save function */
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beql 9f
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tstl 8(%ap) /* check stack */
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beql 9f
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/*
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* The system call expects (flags, stack).
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*/
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movl 12(%ap),4(%ap) /* XXX this doesn't work for
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callg with a RO arglist */
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movl $2,(%ap)
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SYSTRAP(__clone) /* only %r0/%r1 munged */
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blbc %r1,8f /* %r1<0>: 0=parent 1=child */
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/* Call the clone's entry point. */
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pushl 16(%ap)
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calls $1,(%r2)
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/* Pass return value to _exit(). */
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pushl %r0
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calls $1,_C_LABEL(_exit)
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/* NOTREACHED */
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8: ret
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9: movl $EINVAL,%r0
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jmp CERROR+2
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