72 lines
2.8 KiB
ArmAsm
72 lines
2.8 KiB
ArmAsm
/* $NetBSD: __clone.S,v 1.4 2003/08/10 20:39:15 scw Exp $ */
|
|
|
|
/*
|
|
* Copyright 2002 Wasabi Systems, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* Written by Steve C. Woodford for Wasabi Systems, Inc.
|
|
*
|
|
* 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed for the NetBSD Project by
|
|
* Wasabi Systems, Inc.
|
|
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
|
|
* or promote products derived from this software without specific prior
|
|
* written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
|
|
* 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/errno.h>
|
|
#include "SYS.h"
|
|
|
|
#ifdef WEAK_ALIAS
|
|
WEAK_ALIAS(clone,__clone)
|
|
#endif
|
|
|
|
/*
|
|
* int clone(int (*fn)(void *), void *stack, int flags, void *arg);
|
|
* r2 r3 r4 r5
|
|
*/
|
|
ENTRY(__clone)
|
|
pta/u 1f, tr0 /* Preload error path */
|
|
beq/u r2, r63, tr0 /* Bomb if fn is NULL */
|
|
beq/u r3, r63, tr0 /* Bomb if stack is NULL */
|
|
ptabs/u r2, tr1 /* Preserve "fn" in tr1 (syscall won't trash) */
|
|
or r4, r63, r2 /* Shuffle syscall args: flags */
|
|
SYSTRAP(__clone) /* syscall args: stack already in r3 */
|
|
pta/u 2f, tr0
|
|
bne/u r0, r63, tr0 /* Bail on error */
|
|
ptabs/l r18, tr0
|
|
beq/l r3, r63, tr0 /* If parent, just return. */
|
|
or r5, r63, r2 /* Clone's "arg" was safe in r5 */
|
|
blink tr1, r18 /* Invoke the clone */
|
|
PIC_PROLOGUE
|
|
PIC_PTAL(_C_LABEL(_exit), r0, tr0)
|
|
blink tr0, r63 /* If clone returns, invoke _exit(3) */
|
|
/*NOTREACHED*/
|
|
|
|
1: movi EINVAL, r2
|
|
2: PIC_PROLOGUE
|
|
PIC_PTAL(_C_LABEL(__cerror), r0, tr0)
|
|
blink tr0, r63
|
|
/*NOTREACHED*/
|