swapcontext.S revision 1.1.2.1
1 1.1.2.1 briggs /* $NetBSD: swapcontext.S,v 1.1.2.1 2001/11/08 05:37:36 briggs Exp $ */ 2 1.1.2.1 briggs 3 1.1.2.1 briggs /*- 4 1.1.2.1 briggs * Copyright (c) 2001 The NetBSD Foundation, Inc. 5 1.1.2.1 briggs * All rights reserved. 6 1.1.2.1 briggs * 7 1.1.2.1 briggs * This code is derived from software contributed to The NetBSD Foundation 8 1.1.2.1 briggs * by Klaus Klein. 9 1.1.2.1 briggs * 10 1.1.2.1 briggs * Redistribution and use in source and binary forms, with or without 11 1.1.2.1 briggs * modification, are permitted provided that the following conditions 12 1.1.2.1 briggs * are met: 13 1.1.2.1 briggs * 1. Redistributions of source code must retain the above copyright 14 1.1.2.1 briggs * notice, this list of conditions and the following disclaimer. 15 1.1.2.1 briggs * 2. Redistributions in binary form must reproduce the above copyright 16 1.1.2.1 briggs * notice, this list of conditions and the following disclaimer in the 17 1.1.2.1 briggs * documentation and/or other materials provided with the distribution. 18 1.1.2.1 briggs * 3. All advertising materials mentioning features or use of this software 19 1.1.2.1 briggs * must display the following acknowledgement: 20 1.1.2.1 briggs * This product includes software developed by the NetBSD 21 1.1.2.1 briggs * Foundation, Inc. and its contributors. 22 1.1.2.1 briggs * 4. Neither the name of The NetBSD Foundation nor the names of its 23 1.1.2.1 briggs * contributors may be used to endorse or promote products derived 24 1.1.2.1 briggs * from this software without specific prior written permission. 25 1.1.2.1 briggs * 26 1.1.2.1 briggs * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 1.1.2.1 briggs * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 1.1.2.1 briggs * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 1.1.2.1 briggs * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 1.1.2.1 briggs * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 1.1.2.1 briggs * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 1.1.2.1 briggs * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 1.1.2.1 briggs * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 1.1.2.1 briggs * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 1.1.2.1 briggs * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 1.1.2.1 briggs * POSSIBILITY OF SUCH DAMAGE. 37 1.1.2.1 briggs */ 38 1.1.2.1 briggs 39 1.1.2.1 briggs #include "SYS.h" 40 1.1.2.1 briggs 41 1.1.2.1 briggs #if defined(LIBC_SCCS) && !defined(lint) 42 1.1.2.1 briggs .text 43 1.1.2.1 briggs .asciz "$NetBSD: swapcontext.S,v 1.1.2.1 2001/11/08 05:37:36 briggs Exp $" 44 1.1.2.1 briggs #endif /* LIBC_SCCS && !lint */ 45 1.1.2.1 briggs 46 1.1.2.1 briggs ENTRY(swapcontext) 47 1.1.2.1 briggs stwu 1, -16(1) # set up new stack frame 48 1.1.2.1 briggs mflr 0 49 1.1.2.1 briggs stw 0, 20(1) # save link register 50 1.1.2.1 briggs stw 3, 8(1) # must save oucp 51 1.1.2.1 briggs stw 4, 12(1) # must save ucp 52 1.1.2.1 briggs bl PIC_PLT(_C_LABEL(_getcontext)) # getcontext(oucp) 53 1.1.2.1 briggs cmpwi 3, 0 54 1.1.2.1 briggs bne 1f 55 1.1.2.1 briggs lwz 11, 8(1) # load oucp for adjustment 56 1.1.2.1 briggs lwz 0, 20(1) 57 1.1.2.1 briggs stw 0, (48 + 34 * 4)(11) # pc <- lr 58 1.1.2.1 briggs la 0, 16(1) 59 1.1.2.1 briggs stw 0, (48 + 1 * 4)(11) # adjust sp 60 1.1.2.1 briggs lwz 3, 12(1) # load ucp 61 1.1.2.1 briggs bl PIC_PLT(_C_LABEL(setcontext)) # setcontext(ucp) 62 1.1.2.1 briggs 1: 63 1.1.2.1 briggs lwz 0, 20(1) 64 1.1.2.1 briggs mtlr 0 65 1.1.2.1 briggs la 1, 16(1) 66 1.1.2.1 briggs blr 67
Indexes created Fri Oct 03 02:09:57 GMT 2025