1107571Sgrehan/*- 2107571Sgrehan * Copyright (c) 2002 Peter Grehan. 3107571Sgrehan * All rights reserved. 4107571Sgrehan * 5107571Sgrehan * Redistribution and use in source and binary forms, with or without 6107571Sgrehan * modification, are permitted provided that the following conditions 7107571Sgrehan * are met: 8107571Sgrehan * 1. Redistributions of source code must retain the above copyright 9107571Sgrehan * notice, this list of conditions and the following disclaimer. 10107571Sgrehan * 2. Redistributions in binary form must reproduce the above copyright 11107571Sgrehan * notice, this list of conditions and the following disclaimer in the 12107571Sgrehan * documentation and/or other materials provided with the distribution. 13107571Sgrehan * 14107571Sgrehan * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15107571Sgrehan * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16107571Sgrehan * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17107571Sgrehan * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18107571Sgrehan * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19107571Sgrehan * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20107571Sgrehan * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21107571Sgrehan * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22107571Sgrehan * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23107571Sgrehan * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24107571Sgrehan * SUCH DAMAGE. 25107571Sgrehan */ 26107571Sgrehan/* $NetBSD: _setjmp.S,v 1.1 1997/03/29 20:55:53 thorpej Exp $ */ 27107571Sgrehan 28107571Sgrehan#include <machine/asm.h> 29107571Sgrehan__FBSDID("$FreeBSD$"); 30107571Sgrehan 31107571Sgrehan/* 32107571Sgrehan * C library -- _setjmp, _longjmp 33107571Sgrehan * 34107571Sgrehan * _longjmp(a,v) 35107571Sgrehan * will generate a "return(v?v:1)" from the last call to 36107571Sgrehan * _setjmp(a) 37107571Sgrehan * by restoring registers from the stack. 38107571Sgrehan * The previous signal state is NOT restored. 39107571Sgrehan * 40107571Sgrehan * jmpbuf layout: 41107571Sgrehan * +------------+ 42107571Sgrehan * | unused | 43107571Sgrehan * +------------+ 44107571Sgrehan * | unused | 45107571Sgrehan * | | 46107571Sgrehan * | (4 words) | 47107571Sgrehan * | | 48107571Sgrehan * +------------+ 49107571Sgrehan * | saved regs | 50107571Sgrehan * | ... | 51107571Sgrehan */ 52107571Sgrehan 53107571SgrehanENTRY(_setjmp) 54107571Sgrehan mflr %r11 55107571Sgrehan mfcr %r12 56107571Sgrehan mr %r10,%r1 57107571Sgrehan mr %r9,%r2 58107571Sgrehan stmw %r9,20(%r3) 59107571Sgrehan li %r3,0 60107571Sgrehan blr 61107571Sgrehan 62107571SgrehanENTRY(_longjmp) 63107571Sgrehan lmw %r9,20(%r3) 64107571Sgrehan mtlr %r11 65107571Sgrehan mtcr %r12 66107571Sgrehan mr %r1,%r10 67107571Sgrehan or. %r3,%r4,%r4 68107571Sgrehan bnelr 69107571Sgrehan li %r3,1 70107571Sgrehan blr 71217398Skib 72217398Skib .section .note.GNU-stack,"",%progbits 73