88 lines
2.6 KiB
ArmAsm
88 lines
2.6 KiB
ArmAsm
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/* $NetBSD: __clone.S,v 1.6 2008/04/28 20:22:56 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 Fredette.
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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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.import __cerror, code
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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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ldi EINVAL, %t1
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comb,= %r0, %arg0, __cerror
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nop
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comb,= %r0, %arg1, __cerror
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nop
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/*
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* Put the func and arg arguments into a frame in the child's stack.
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*/
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ldo (HPPA_FRAME_SIZE * 2)(%arg1), %arg1
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stw %arg0, HPPA_FRAME_ARG(0)(%arg1)
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stw %arg3, HPPA_FRAME_ARG(1)(%arg1)
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/*
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* The system call expects (flags, stack).
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*/
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copy %arg2, %arg0
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SYSCALL(__clone)
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comb,<>,n %r0, %ret1, 9f
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bv,n %r0(%rp)
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9: /*
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* Child: Reload the function and argument from the new stack.
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*/
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ldw HPPA_FRAME_ARG(0)(%sp), %r22
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ldw HPPA_FRAME_ARG(1)(%sp), %arg0
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/* Call the clone's entry point. */
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stw %r19, HPPA_FRAME_ARG(2)(%sp)
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bl $$dyncall, %r31
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copy %r31, %rp
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ldw HPPA_FRAME_ARG(2)(%sp), %r19
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/* Pass the return value to _exit(). */
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copy %ret0, %arg0
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PIC_CALL(_exit)
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/* NOTREACHED */
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EXIT(__clone)
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