111 lines
3.0 KiB
ArmAsm
111 lines
3.0 KiB
ArmAsm
/* $NetBSD: __clone.S,v 1.3 2001/07/18 12:24:53 fvdl Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 2001 Wasabi Systems, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* Written by Frank van der Linden 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 <machine/asm.h>
|
|
#include <sys/errno.h>
|
|
#include "SYS.h"
|
|
|
|
#ifdef WEAK_ALIAS
|
|
WEAK_ALIAS(clone, __clone)
|
|
#endif
|
|
.text
|
|
|
|
/*
|
|
* int clone(int (*fn)(void *), void *stack, int flags, void *arg);
|
|
*/
|
|
ENTRY(__clone)
|
|
pushl %ebp
|
|
|
|
/*
|
|
* Sanity checks: func and stack may not be NULL.
|
|
*/
|
|
movl 8(%esp), %ebp
|
|
cmpl $0,%ebp /* function */
|
|
je 3f
|
|
movl 12(%esp),%eax /* stack */
|
|
cmpl $0,%eax
|
|
je 3f
|
|
|
|
/*
|
|
* Set up the stack for the clone.
|
|
*/
|
|
movl 20(%esp),%ecx
|
|
movl %ecx,-4(%eax) /* argument */
|
|
leal -4(%eax),%eax /* sp points to arg */
|
|
|
|
pushl %eax /* stack */
|
|
pushl 20(%esp) /* flags */
|
|
pushl $0 /* dummy return address */
|
|
|
|
SYSTRAP(__clone)
|
|
jc 4f
|
|
cmpl $0,%eax
|
|
jne 2f /* we're the parent */
|
|
call *%ebp /* this is the clone, call the function */
|
|
|
|
#ifdef PIC
|
|
PIC_PROLOGUE
|
|
pushl %eax /* clone does _exit(func(arg)); */
|
|
call PIC_PLT(_C_LABEL(_exit))
|
|
addl $4,%esp
|
|
PIC_EPILOGUE
|
|
#else
|
|
pushl %eax
|
|
call _C_LABEL(_exit)
|
|
addl $4,%esp
|
|
#endif
|
|
|
|
2:
|
|
addl $12,%esp
|
|
popl %ebp
|
|
ret
|
|
3:
|
|
movl $EINVAL,%eax
|
|
jmp 5f
|
|
4:
|
|
addl $12,%esp
|
|
5:
|
|
popl %ebp
|
|
#ifdef PIC
|
|
PIC_PROLOGUE
|
|
movl PIC_GOT(CERROR),%edx
|
|
PIC_EPILOGUE
|
|
jmp *%edx
|
|
#else
|
|
jmp CERROR
|
|
#endif
|