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 std %r9,40 + 0*8(%r3) 59 std %r10,40 + 1*8(%r3) 60 std %r11,40 + 2*8(%r3) 61 std %r12,40 + 3*8(%r3) 62 std %r13,40 + 4*8(%r3) 63 std %r14,40 + 5*8(%r3) 64 std %r15,40 + 6*8(%r3) 65 std %r16,40 + 7*8(%r3) 66 std %r17,40 + 8*8(%r3) 67 std %r18,40 + 9*8(%r3) 68 std %r19,40 + 10*8(%r3) 69 std %r20,40 + 11*8(%r3) 70 std %r21,40 + 12*8(%r3) 71 std %r22,40 + 13*8(%r3) 72 std %r23,40 + 14*8(%r3) 73 std %r24,40 + 15*8(%r3) 74 std %r25,40 + 16*8(%r3) 75 std %r26,40 + 17*8(%r3) 76 std %r27,40 + 18*8(%r3) 77 std %r28,40 + 19*8(%r3) 78 std %r29,40 + 20*8(%r3) 79 std %r30,40 + 21*8(%r3) 80 std %r31,40 + 22*8(%r3) 81 li %r3,0 82 blr 83 84ENTRY(_longjmp) 85 ld %r9,40 + 0*8(%r3) 86 ld %r10,40 + 1*8(%r3) 87 ld %r11,40 + 2*8(%r3) 88 ld %r12,40 + 3*8(%r3) 89 ld %r13,40 + 4*8(%r3) 90 ld %r14,40 + 5*8(%r3) 91 ld %r15,40 + 6*8(%r3) 92 ld %r16,40 + 7*8(%r3) 93 ld %r17,40 + 8*8(%r3) 94 ld %r18,40 + 9*8(%r3) 95 ld %r19,40 + 10*8(%r3) 96 ld %r20,40 + 11*8(%r3) 97 ld %r21,40 + 12*8(%r3) 98 ld %r22,40 + 13*8(%r3) 99 ld %r23,40 + 14*8(%r3) 100 ld %r24,40 + 15*8(%r3) 101 ld %r25,40 + 16*8(%r3) 102 ld %r26,40 + 17*8(%r3) 103 ld %r27,40 + 18*8(%r3) 104 ld %r28,40 + 19*8(%r3) 105 ld %r29,40 + 20*8(%r3) 106 ld %r30,40 + 21*8(%r3) 107 ld %r31,40 + 22*8(%r3) 108 109 mtlr %r11 110 mtcr %r12 111 mr %r2,%r9 112 mr %r1,%r10 113 or. %r3,%r4,%r4 114 bnelr 115 li %r3,1 116 blr 117