1*e415d488SLionel Sambuc/* $NetBSD: __clone.S,v 1.4 2011/01/25 02:38:15 matt Exp $ */ 22fe8fb19SBen Gras 32fe8fb19SBen Gras/*- 42fe8fb19SBen Gras * Copyright (c) 2001 The NetBSD Foundation, Inc. 52fe8fb19SBen Gras * All rights reserved. 62fe8fb19SBen Gras * 72fe8fb19SBen Gras * This code is derived from software contributed to The NetBSD Foundation 82fe8fb19SBen Gras * by Matt Thomas <matt@3am-software.com> 92fe8fb19SBen Gras * 102fe8fb19SBen Gras * Redistribution and use in source and binary forms, with or without 112fe8fb19SBen Gras * modification, are permitted provided that the following conditions 122fe8fb19SBen Gras * are met: 132fe8fb19SBen Gras * 1. Redistributions of source code must retain the above copyright 142fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer. 152fe8fb19SBen Gras * 2. Redistributions in binary form must reproduce the above copyright 162fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer in the 172fe8fb19SBen Gras * documentation and/or other materials provided with the distribution. 182fe8fb19SBen Gras * 192fe8fb19SBen Gras * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 202fe8fb19SBen Gras * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 212fe8fb19SBen Gras * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 222fe8fb19SBen Gras * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 232fe8fb19SBen Gras * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 242fe8fb19SBen Gras * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 252fe8fb19SBen Gras * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 262fe8fb19SBen Gras * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 272fe8fb19SBen Gras * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 282fe8fb19SBen Gras * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 292fe8fb19SBen Gras * POSSIBILITY OF SUCH DAMAGE. 302fe8fb19SBen Gras */ 312fe8fb19SBen Gras 322fe8fb19SBen Gras#include <sys/errno.h> 332fe8fb19SBen Gras 342fe8fb19SBen Gras#include "SYS.h" 352fe8fb19SBen Gras 36*e415d488SLionel Sambuc#ifdef SYSLIBC_SCCS 37*e415d488SLionel SambucRCSID("$NetBSD: __clone.S,v 1.4 2011/01/25 02:38:15 matt Exp $") 38*e415d488SLionel Sambuc#endif 39*e415d488SLionel Sambuc 402fe8fb19SBen Gras#ifdef WEAK_ALIAS 412fe8fb19SBen GrasWEAK_ALIAS(clone, __clone) 422fe8fb19SBen Gras#endif 432fe8fb19SBen Gras 442fe8fb19SBen Gras/* 452fe8fb19SBen Gras * int __clone(int (*fn)(void *), void *stack, int flags, void *arg); 462fe8fb19SBen Gras */ 472fe8fb19SBen GrasENTRY(__clone, 0) 482fe8fb19SBen Gras 492fe8fb19SBen Gras /* 502fe8fb19SBen Gras * Sanity checks: func and stack may not be NULL. 512fe8fb19SBen Gras */ 522fe8fb19SBen Gras movl 4(%ap),%r2 /* check and save function */ 532fe8fb19SBen Gras beql 9f 542fe8fb19SBen Gras tstl 8(%ap) /* check stack */ 552fe8fb19SBen Gras beql 9f 562fe8fb19SBen Gras 572fe8fb19SBen Gras /* 582fe8fb19SBen Gras * The system call expects (flags, stack). 592fe8fb19SBen Gras */ 602fe8fb19SBen Gras movl 12(%ap),4(%ap) /* XXX this doesn't work for 612fe8fb19SBen Gras callg with a RO arglist */ 622fe8fb19SBen Gras movl $2,(%ap) 632fe8fb19SBen Gras SYSTRAP(__clone) /* only %r0/%r1 munged */ 642fe8fb19SBen Gras 652fe8fb19SBen Gras blbc %r1,8f /* %r1<0>: 0=parent 1=child */ 662fe8fb19SBen Gras 672fe8fb19SBen Gras /* Call the clone's entry point. */ 682fe8fb19SBen Gras pushl 16(%ap) 692fe8fb19SBen Gras calls $1,(%r2) 702fe8fb19SBen Gras 712fe8fb19SBen Gras /* Pass return value to _exit(). */ 722fe8fb19SBen Gras pushl %r0 732fe8fb19SBen Gras calls $1,_C_LABEL(_exit) 742fe8fb19SBen Gras 752fe8fb19SBen Gras /* NOTREACHED */ 762fe8fb19SBen Gras 772fe8fb19SBen Gras8: ret 782fe8fb19SBen Gras 792fe8fb19SBen Gras9: movl $EINVAL,%r0 802fe8fb19SBen Gras jmp CERROR+2 81*e415d488SLionel SambucEND(__clone) 82