1*0a6a1f1dSLionel Sambuc/* $NetBSD: __clone.S,v 1.6 2014/08/23 02:24:22 matt Exp $ */ 22fe8fb19SBen Gras 32fe8fb19SBen Gras/*- 42fe8fb19SBen Gras * Copyright (c) 2001 Tsubai Masanari. All rights reserved. 52fe8fb19SBen Gras * 62fe8fb19SBen Gras * Redistribution and use in source and binary forms, with or without 72fe8fb19SBen Gras * modification, are permitted provided that the following conditions 82fe8fb19SBen Gras * are met: 92fe8fb19SBen Gras * 1. Redistributions of source code must retain the above copyright 102fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer. 112fe8fb19SBen Gras * 2. Redistributions in binary form must reproduce the above copyright 122fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer in the 132fe8fb19SBen Gras * documentation and/or other materials provided with the distribution. 142fe8fb19SBen Gras * 3. The name of the author may not be used to endorse or promote products 152fe8fb19SBen Gras * derived from this software without specific prior written permission. 162fe8fb19SBen Gras * 172fe8fb19SBen Gras * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 182fe8fb19SBen Gras * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 192fe8fb19SBen Gras * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 202fe8fb19SBen Gras * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 212fe8fb19SBen Gras * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 222fe8fb19SBen Gras * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 232fe8fb19SBen Gras * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 242fe8fb19SBen Gras * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 252fe8fb19SBen Gras * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 262fe8fb19SBen Gras * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 272fe8fb19SBen Gras */ 282fe8fb19SBen Gras 292fe8fb19SBen Gras#include <sys/errno.h> 302fe8fb19SBen Gras#include "SYS.h" 312fe8fb19SBen Gras 322fe8fb19SBen Gras#if defined(LIBC_SCCS) && !defined(lint) 33*0a6a1f1dSLionel Sambuc__RCSID("$NetBSD: __clone.S,v 1.6 2014/08/23 02:24:22 matt Exp $") 342fe8fb19SBen Gras#endif /* LIBC_SCCS && !lint */ 352fe8fb19SBen Gras 362fe8fb19SBen Gras#ifdef WEAK_ALIAS 372fe8fb19SBen GrasWEAK_ALIAS(clone, __clone) 382fe8fb19SBen Gras#endif 392fe8fb19SBen Gras 402fe8fb19SBen Gras/* 412fe8fb19SBen Gras * int __clone(int (*fn)(void *), void *stack, int flags, void *arg); 422fe8fb19SBen Gras */ 432fe8fb19SBen GrasENTRY(__clone) 442fe8fb19SBen Gras /* 452fe8fb19SBen Gras * Sanity checks: func and stack may not be NULL. 462fe8fb19SBen Gras */ 47*0a6a1f1dSLionel Sambuc cmpptri %r3,0 482fe8fb19SBen Gras beq 1f 49*0a6a1f1dSLionel Sambuc cmpptri %r4,0 502fe8fb19SBen Gras beq 1f 512fe8fb19SBen Gras 522fe8fb19SBen Gras mr %r7,%r3 /* Save fn in r7. */ 532fe8fb19SBen Gras mr %r3,%r5 542fe8fb19SBen Gras _DOSYSCALL(__clone) /* (flags, stack) */ 552fe8fb19SBen Gras bso 2f /* error... */ 562fe8fb19SBen Gras 57*0a6a1f1dSLionel Sambuc cmpptri %r3,0 582fe8fb19SBen Gras bnelr /* We're the parent, just return. */ 592fe8fb19SBen Gras 602fe8fb19SBen Gras mtlr %r7 /* fn */ 612fe8fb19SBen Gras mr %r3,%r6 /* arg */ 622fe8fb19SBen Gras blrl /* Call the clone's entry point. */ 632fe8fb19SBen Gras 6484d9c625SLionel Sambuc#ifdef __PIC__ 652fe8fb19SBen Gras PIC_TOCSETUP(__clone, %r30) /* exit won't return so blow away r30 */ 662fe8fb19SBen Gras#endif 672fe8fb19SBen Gras bl PIC_PLT(_C_LABEL(_exit)) 682fe8fb19SBen Gras 692fe8fb19SBen Gras1: 702fe8fb19SBen Gras li %r3,EINVAL 712fe8fb19SBen Gras2: 72*0a6a1f1dSLionel Sambuc BRANCH_TO_CERROR() 732fe8fb19SBen GrasEND(__clone) 74