1 /* $NetBSD: __clone.S,v 1.1 2014/09/03 19:34:26 matt 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>
32 #if defined(LIBC_SCCS) && !defined(lint)
33 __RCSID("$NetBSD: __clone.S,v 1.1 2014/09/03 19:34:26 matt Exp $")
34 #endif /* LIBC_SCCS && !lint */
37 WEAK_ALIAS(clone, __clone)
41 * int __clone(int (*fn)(void *), void *stack, int flags, void *arg);
45 * Sanity checks: func and stack may not be NULL.
52 l.or r7,r3,r0 /* Save fn in r7. */
54 _DOSYSCALL(__clone) /* (flags, stack) */
55 l.bf _C_LABEL(__cerror) /* error... */
59 l.bf 1f /* We're the parent, just return. */
64 1: l.or r3,r6,r0 /* arg */
65 l.jalr r7 /* Call the clone's entry point. */
69 // We don't need to save r9 or r16 since we aren't ever coming back
72 l.jal plt(_C_LABEL(_exit))
77 l.j _C_LABEL(__cerror)