1*27620987Smatt/* $NetBSD: __clone.S,v 1.1 2014/09/03 19:34:26 matt Exp $ */ 2*27620987Smatt 3*27620987Smatt/*- 4*27620987Smatt * Copyright (c) 2001 Tsubai Masanari. All rights reserved. 5*27620987Smatt * 6*27620987Smatt * Redistribution and use in source and binary forms, with or without 7*27620987Smatt * modification, are permitted provided that the following conditions 8*27620987Smatt * are met: 9*27620987Smatt * 1. Redistributions of source code must retain the above copyright 10*27620987Smatt * notice, this list of conditions and the following disclaimer. 11*27620987Smatt * 2. Redistributions in binary form must reproduce the above copyright 12*27620987Smatt * notice, this list of conditions and the following disclaimer in the 13*27620987Smatt * documentation and/or other materials provided with the distribution. 14*27620987Smatt * 3. The name of the author may not be used to endorse or promote products 15*27620987Smatt * derived from this software without specific prior written permission. 16*27620987Smatt * 17*27620987Smatt * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18*27620987Smatt * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19*27620987Smatt * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20*27620987Smatt * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21*27620987Smatt * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22*27620987Smatt * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23*27620987Smatt * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24*27620987Smatt * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25*27620987Smatt * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26*27620987Smatt * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27*27620987Smatt */ 28*27620987Smatt 29*27620987Smatt#include <sys/errno.h> 30*27620987Smatt#include "SYS.h" 31*27620987Smatt 32*27620987Smatt#if defined(LIBC_SCCS) && !defined(lint) 33*27620987Smatt__RCSID("$NetBSD: __clone.S,v 1.1 2014/09/03 19:34:26 matt Exp $") 34*27620987Smatt#endif /* LIBC_SCCS && !lint */ 35*27620987Smatt 36*27620987Smatt#ifdef WEAK_ALIAS 37*27620987SmattWEAK_ALIAS(clone, __clone) 38*27620987Smatt#endif 39*27620987Smatt 40*27620987Smatt/* 41*27620987Smatt * int __clone(int (*fn)(void *), void *stack, int flags, void *arg); 42*27620987Smatt */ 43*27620987SmattENTRY(__clone) 44*27620987Smatt /* 45*27620987Smatt * Sanity checks: func and stack may not be NULL. 46*27620987Smatt */ 47*27620987Smatt l.sfeqi r3,0 48*27620987Smatt l.bf 2f 49*27620987Smatt l.sfeqi r4,0 50*27620987Smatt l.bf 2f 51*27620987Smatt 52*27620987Smatt l.or r7,r3,r0 /* Save fn in r7. */ 53*27620987Smatt l.or r3,r5,r0 54*27620987Smatt _DOSYSCALL(__clone) /* (flags, stack) */ 55*27620987Smatt l.bf _C_LABEL(__cerror) /* error... */ 56*27620987Smatt l.nop 57*27620987Smatt 58*27620987Smatt l.sfeqi r11,0 59*27620987Smatt l.bf 1f /* We're the parent, just return. */ 60*27620987Smatt l.nop 61*27620987Smatt l.jr lr 62*27620987Smatt l.nop 63*27620987Smatt 64*27620987Smatt1: l.or r3,r6,r0 /* arg */ 65*27620987Smatt l.jalr r7 /* Call the clone's entry point. */ 66*27620987Smatt l.nop 67*27620987Smatt 68*27620987Smatt#ifdef __PIC__ 69*27620987Smatt // We don't need to save r9 or r16 since we aren't ever coming back 70*27620987Smatt PIC_GOTSETUP(r16) 71*27620987Smatt#endif 72*27620987Smatt l.jal plt(_C_LABEL(_exit)) 73*27620987Smatt l.nop 74*27620987Smatt 75*27620987Smatt2: 76*27620987Smatt l.addi r11,r0,EINVAL 77*27620987Smatt l.j _C_LABEL(__cerror) 78*27620987Smatt l.nop 79*27620987SmattEND(__clone) 80