swapcontext.S revision 1.2
1 1.2 thorpej /* $NetBSD: swapcontext.S,v 1.2 2003/01/20 00:26:39 thorpej Exp $ */ 2 1.2 thorpej 3 1.2 thorpej /*- 4 1.2 thorpej * Copyright (c) 2001 The NetBSD Foundation, Inc. 5 1.2 thorpej * All rights reserved. 6 1.2 thorpej * 7 1.2 thorpej * This code is derived from software contributed to The NetBSD Foundation 8 1.2 thorpej * by Klaus Klein. 9 1.2 thorpej * 10 1.2 thorpej * Redistribution and use in source and binary forms, with or without 11 1.2 thorpej * modification, are permitted provided that the following conditions 12 1.2 thorpej * are met: 13 1.2 thorpej * 1. Redistributions of source code must retain the above copyright 14 1.2 thorpej * notice, this list of conditions and the following disclaimer. 15 1.2 thorpej * 2. Redistributions in binary form must reproduce the above copyright 16 1.2 thorpej * notice, this list of conditions and the following disclaimer in the 17 1.2 thorpej * documentation and/or other materials provided with the distribution. 18 1.2 thorpej * 3. All advertising materials mentioning features or use of this software 19 1.2 thorpej * must display the following acknowledgement: 20 1.2 thorpej * This product includes software developed by the NetBSD 21 1.2 thorpej * Foundation, Inc. and its contributors. 22 1.2 thorpej * 4. Neither the name of The NetBSD Foundation nor the names of its 23 1.2 thorpej * contributors may be used to endorse or promote products derived 24 1.2 thorpej * from this software without specific prior written permission. 25 1.2 thorpej * 26 1.2 thorpej * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 1.2 thorpej * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 1.2 thorpej * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 1.2 thorpej * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 1.2 thorpej * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 1.2 thorpej * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 1.2 thorpej * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 1.2 thorpej * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 1.2 thorpej * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 1.2 thorpej * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 1.2 thorpej * POSSIBILITY OF SUCH DAMAGE. 37 1.2 thorpej */ 38 1.2 thorpej 39 1.2 thorpej #include <machine/asm.h> 40 1.2 thorpej #if defined(SYSLIBC_SCCS) && !defined(lint) 41 1.2 thorpej RCSID("$NetBSD: swapcontext.S,v 1.2 2003/01/20 00:26:39 thorpej Exp $") 42 1.2 thorpej #endif /* SYSLIBC_SCCS and not lint */ 43 1.2 thorpej 44 1.2 thorpej ENTRY(swapcontext) 45 1.2 thorpej mov.l r5, @-r15 46 1.2 thorpej sts.l pr, @-r15 47 1.2 thorpej mov.l _L._getcontext, r0 48 1.2 thorpej jsr @r0 49 1.2 thorpej mov.l r4, @-r15 50 1.2 thorpej mov.l @r15+, r1 51 1.2 thorpej tst r0, r0 52 1.2 thorpej bf 1f 53 1.2 thorpej mov.l @r15, r0 54 1.2 thorpej mov.l r0, @(36 + 1 * 4, r1) /* saved pc <- pr */ 55 1.2 thorpej mov.l _L.setcontext, r2 56 1.2 thorpej jsr @r2 57 1.2 thorpej mov.l @(4, r15), r4 58 1.2 thorpej 1: 59 1.2 thorpej lds.l @r15+, pr 60 1.2 thorpej rts 61 1.2 thorpej add #4, r15 62 1.2 thorpej 63 1.2 thorpej .align 2 64 1.2 thorpej _L._getcontext: .long _C_LABEL(_getcontext) 65 1.2 thorpej _L.setcontext: .long _C_LABEL(setcontext) 66
Indexes created Fri Sep 26 20:09:58 GMT 2025