1/* $NetBSD: __clone.S,v 1.1 2014/09/03 19:34:26 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#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 */ 35 36#ifdef WEAK_ALIAS 37WEAK_ALIAS(clone, __clone) 38#endif 39 40/* 41 * int __clone(int (*fn)(void *), void *stack, int flags, void *arg); 42 */ 43ENTRY(__clone) 44 /* 45 * Sanity checks: func and stack may not be NULL. 46 */ 47 l.sfeqi r3,0 48 l.bf 2f 49 l.sfeqi r4,0 50 l.bf 2f 51 52 l.or r7,r3,r0 /* Save fn in r7. */ 53 l.or r3,r5,r0 54 _DOSYSCALL(__clone) /* (flags, stack) */ 55 l.bf _C_LABEL(__cerror) /* error... */ 56 l.nop 57 58 l.sfeqi r11,0 59 l.bf 1f /* We're the parent, just return. */ 60 l.nop 61 l.jr lr 62 l.nop 63 641: l.or r3,r6,r0 /* arg */ 65 l.jalr r7 /* Call the clone's entry point. */ 66 l.nop 67 68#ifdef __PIC__ 69 // We don't need to save r9 or r16 since we aren't ever coming back 70 PIC_GOTSETUP(r16) 71#endif 72 l.jal plt(_C_LABEL(_exit)) 73 l.nop 74 752: 76 l.addi r11,r0,EINVAL 77 l.j _C_LABEL(__cerror) 78 l.nop 79END(__clone) 80