2 * Copyright (c) 2000 Peter Wemm <peter@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $FreeBSD: src/lib/libc/i386/gen/rfork_thread.S,v 1.2.2.1 2001/02/07 00:12:45 peter Exp $
27 * $DragonFly: src/lib/libc/i386/gen/rfork_thread.S,v 1.3 2004/04/05 05:31:58 dillon Exp $
31 * With thanks to John Dyson for the original version of this.
38 * rfork_thread(flags, stack_addr, start_fnc, start_arg);
40 * flags: Flags to rfork system call. See rfork(2).
41 * stack_addr: Top of stack for thread.
42 * start_fnc: Address of thread function to call in child.
43 * start_arg: Argument to pass to the thread function in child.
52 * Push thread info onto the new thread's stack
54 movl 12(%ebp), %esi # get stack addr
57 movl 20(%ebp), %eax # get start argument
61 movl 16(%ebp), %eax # get start thread address
65 * Prepare and execute the thread creation syscall
74 * Check to see if we are in the parent or child
86 * If we are in the child (new thread), then
87 * set-up the call to the internal subroutine. If it
88 * returns, then call __exit.
104 leal SYS_sys_exit, %eax
109 * Branch here if the thread creation fails:
117 jmp PIC_PLT(HIDENAME(cerror))