89 lines
2.5 KiB
ArmAsm
89 lines
2.5 KiB
ArmAsm
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/* $NetBSD: __clone.S,v 1.6 2006/01/06 03:58:31 uwe Exp $ */
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/*-
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* Copyright (c) 2001 Tsubai Masanari. All rights reserved.
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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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE 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)
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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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tst r4, r4
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bt inval
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tst r5, r5
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bt inval
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mov r4, r2 /* save entry point for later */
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mov r6, r4 /* r4 = flags, r5 = stack (already) */
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mov.l .L_SYS___clone, r0
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trapa #0x80
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bf err
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tst r0, r0
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bf 3f /* we're the parent, just return */
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jsr @r2 /* clone does _exit((*fn)(arg)); */
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mov r7, r4
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mov.l .L__exit, r1
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#ifdef PIC
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mov r0, r4
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mov.l .L_got, r12 /* PIC_PROLOGUE_NOSAVE(.L_got) */
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mova .L_got, r0 /* expanded to fill the delay slot */
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1: JUMP r1
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add r0, r12
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#else
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JUMP r1
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mov r0, r4
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#endif
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/* NOTREACHED */
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inval:
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mov #EINVAL, r0
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err:
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JUMP_CERROR
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/* NOTREACHED */
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3: rts
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nop
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.align 2
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.L_SYS___clone: .long SYS___clone
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.L_got: PIC_GOT_DATUM
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.L__exit: CALL_DATUM(_C_LABEL(_exit), 1b)
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SET_ENTRY_SIZE(__clone)
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