1/*- 2 * Copyright (c) 2002 Peter Grehan. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26/* $NetBSD: _setjmp.S,v 1.1 1997/03/29 20:55:53 thorpej Exp $ */ 27 28#include <machine/asm.h> 29__FBSDID("$FreeBSD$"); 30 31/* 32 * C library -- _setjmp, _longjmp 33 * 34 * _longjmp(a,v) 35 * will generate a "return(v?v:1)" from the last call to 36 * _setjmp(a) 37 * by restoring registers from the stack. 38 * The previous signal state is NOT restored. 39 * 40 * jmpbuf layout: 41 * +------------+ 42 * | unused | 43 * +------------+ 44 * | unused | 45 * | | 46 * | (4 words) | 47 * | | 48 * +------------+ 49 * | saved regs | 50 * | ... | 51 */ 52 53ENTRY(_setjmp) 54 mflr %r11 55 mfcr %r12 56 mr %r10,%r1 57 mr %r9,%r2 58 stmw %r9,20(%r3) 59 li %r3,0 60 blr 61 62ENTRY(_longjmp) 63 lmw %r9,20(%r3) 64 mtlr %r11 65 mtcr %r12 66 mr %r2,%r9 67 mr %r1,%r10 68 or. %r3,%r4,%r4 69 bnelr 70 li %r3,1 71 blr 72