1 /* $NetBSD: __clone.S,v 1.6 2006/01/06 03:58:31 uwe Exp $ */
4 * Copyright (c) 2001 Tsubai Masanari. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #include <sys/errno.h>
33 WEAK_ALIAS(clone,__clone)
37 * int __clone(int (*fn)(void *), void *stack, int flags, void *arg);
41 * Sanity checks: func and stack may not be NULL.
48 mov r4, r2 /* save entry point for later */
50 mov r6, r4 /* r4 = flags, r5 = stack (already) */
51 mov.l .L_SYS___clone, r0
56 bf 3f /* we're the parent, just return */
58 jsr @r2 /* clone does _exit((*fn)(arg)); */
64 mov.l .L_got, r12 /* PIC_PROLOGUE_NOSAVE(.L_got) */
65 mova .L_got, r0 /* expanded to fill the delay slot */
84 .L_SYS___clone: .long SYS___clone
87 .L__exit: CALL_DATUM(_C_LABEL(_exit), 1b)
88 SET_ENTRY_SIZE(__clone)