/*- * Copyright (c) 2000 Peter Wemm <peter@FreeBSD.org> * All rights reserved. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 THE AUTHOR OR CONTRIBUTORS 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. */ /* *                8      12          16         20 * rfork_thread(flags, stack_addr, start_fnc, start_arg); * * flags:		Flags to rfork system call.  See rfork(2). * stack_addr:		Top of stack for thread. * start_fnc:		Address of thread function to call in child. * start_arg:		Argument to pass to the thread function in child. */ ENTRY(rfork_thread)	pushl	%ebp	movl	%esp, %ebp	pushl	%esi 	/*	 * Push thread info onto the new thread's stack	 */	movl	12(%ebp), %esi	# get stack addr 	subl	$4, %esi	movl	20(%ebp), %eax	# get start argument	movl	%eax, (%esi) 	subl	$4, %esi	movl	16(%ebp), %eax	# get start thread address	movl	%eax, (%esi) 	/*	 * Prepare and execute the thread creation syscall	 */	pushl	8(%ebp)	pushl	$0	movl	$SYS_rfork, %eax	int	$0x80	jb 	2f 	/*	 * Check to see if we are in the parent or child	 */	cmpl	$0, %edx	jnz	1f	addl	$8, %esp	popl	%esi	movl	%ebp, %esp	popl	%ebp	ret	.p2align 2 	/*	 * If we are in the child (new thread), then	 * set-up the call to the internal subroutine.  If it	 * returns, then call __exit.	 */1:	movl	%esi,%esp	popl	%eax 	call	*%eax	addl	$4, %esp 	/*	 * Exit system call	 */	pushl	%eax	pushl	$0	movl	$SYS_threxit, %eax	int	$0x80 	/*	 * Branch here if the thread creation fails:	 */2:	addl	$8, %esp	popl	%esi	movl	%ebp, %esp	popl	%ebp	PIC_PROLOGUE	jmp     PIC_PLT(_C_LABEL(__cerror))