1/* $NetBSD: __clone.S,v 1.2 2014/08/23 02:24:22 matt Exp $ */ 2 3/*- 4 * Copyright (c) 2001 Tsubai Masanari. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 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. 16 * 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. 27 */ 28 29#include <sys/errno.h> 30#include "SYS.h" 31 32#ifdef WEAK_ALIAS 33WEAK_ALIAS(clone, __clone) 34#endif 35 36/* 37 * int __clone(int (*fn)(void *), void *stack, int flags, void *arg); 38 */ 39ENTRY(__clone) 40 /* 41 * Sanity checks: func and stack may not be NULL. 42 */ 43 cmpptri %r3,0 44 beq 1f 45 cmpptri %r4,0 46 beq 1f 47 48 mr %r7,%r3 /* Save fn in r7. */ 49 mr %r3,%r5 50 _DOSYSCALL(__clone) /* (flags, stack) */ 51 bso 2f /* error... */ 52 53 cmpptri %r3,0 54 bnelr /* We're the parent, just return. */ 55 56 mtlr %r7 /* fn */ 57 mr %r3,%r6 /* arg */ 58 blrl /* Call the clone's entry point. */ 59 60 bl PIC_PLT(_C_LABEL(_exit)) 61 nop 62 631: 64 li %r3,EINVAL 652: 66 BRANCH_TO_CERROR() 67END(__clone) 68