1*0a6a1f1dSLionel Sambuc/* $NetBSD: swapcontext.S,v 1.5 2014/08/13 15:41:21 joerg 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 Klaus Klein. 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.h" 332fe8fb19SBen Gras 342fe8fb19SBen Gras#if defined(LIBC_SCCS) && !defined(lint) 352fe8fb19SBen Gras .text 36*0a6a1f1dSLionel Sambuc .asciz "$NetBSD: swapcontext.S,v 1.5 2014/08/13 15:41:21 joerg Exp $" 372fe8fb19SBen Gras#endif /* LIBC_SCCS && !lint */ 382fe8fb19SBen Gras 392fe8fb19SBen GrasENTRY(swapcontext) 402fe8fb19SBen Gras mc_off = 56 # offset of uc_mcontext 412fe8fb19SBen Gras stdu %r1,-SF_SZ(%r1) # set up new stack frame 422fe8fb19SBen Gras mflr %r0 43*0a6a1f1dSLionel Sambuc std %r0,(SF_SZ+SF_LR)(%r1) # save link register 442fe8fb19SBen Gras std %r3,SF_PARAM(%r1) # must save oucp (was 8) 452fe8fb19SBen Gras std %r4,SF_PARAM+8(%r1) # must save ucp (was 12) 462fe8fb19SBen Gras bl ._getcontext # getcontext(oucp) 472fe8fb19SBen Gras nop 482fe8fb19SBen Gras cmpdi %r3,0 492fe8fb19SBen Gras bne 1f 502fe8fb19SBen Gras ld %r11,SF_PARAM(%r1) # load oucp for adjustment 512fe8fb19SBen Gras ld %r0,SF_SZ+SF_LR(%r1) # get LR back 522fe8fb19SBen Gras std %r0,mc_off+34*8(%r11) # pc <- lr 532fe8fb19SBen Gras la %r0,16(%r1) 542fe8fb19SBen Gras std %r0,mc_off+1*8(%r11) # adjust sp 552fe8fb19SBen Gras ld %r3,SF_PARAM+8(%r1) # load ucp 56e415d488SLionel Sambuc bl PIC_PLT(_C_LABEL(setcontext)) # setcontext(ucp) 572fe8fb19SBen Gras nop 582fe8fb19SBen Gras1: 592fe8fb19SBen Gras ld %r0,SF_SZ+SF_LR(%r1) 602fe8fb19SBen Gras mtlr %r0 612fe8fb19SBen Gras la %r1,SF_SZ(%r1) 622fe8fb19SBen Gras blr 63