/* $NetBSD: __clone.S,v 1.3 2003/10/24 04:41:28 uwe Exp $ */ /*- * Copyright (c) 2001 Tsubai Masanari. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include #include "SYS.h" #ifdef WEAK_ALIAS WEAK_ALIAS(clone,__clone) #endif /* * int __clone(int (*fn)(void *), void *stack, int flags, void *arg); */ ENTRY(__clone) /* * Sanity checks: func and stack may not be NULL. */ tst r4, r4 bt inval tst r5, r5 bt inval mov r4, r2 mov r6, r4 mov.l LSYS___clone, r0 trapa #0x80 bf err tst r0, r0 bf 1f /* We're the parent, just return. */ jsr @r2 /* Call the clone's entry point. */ mov r7, r4 /* arg */ mov.l L__exit, r1 #ifdef PIC braf r1 #else jsr @r1 #endif mov r0, r4 2: inval: mov #EINVAL, r0 err: mov.l Lcerror, r1 #ifdef PIC braf r1 #else jmp @r1 #endif nop 1: rts nop .align 2 LSYS___clone: .long SYS___clone #ifdef PIC L__exit: .long _C_LABEL(_exit)-2b Lcerror: .long cerror-1b #else L__exit: .long _C_LABEL(_exit) Lcerror: .long cerror #endif