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 1.3 1998/10/03 12:30:38 tsubai Exp $ */ 27 28#include <machine/asm.h> 29#include <sys/syscall.h> 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 restored. 39 * 40 * jmpbuf layout: 41 * +------------+ 42 * | unused | 43 * +------------+ 44 * | sig state | 45 * | | 46 * | (4 words) | 47 * | | 48 * +------------+ 49 * | saved regs | 50 * | ... | 51 */ 52 53ENTRY(setjmp) 54 mr %r6,%r3 55 li %r3,1 /* SIG_BLOCK, but doesn't matter */ 56 /* since set == NULL */ 57 li %r4,0 /* set = NULL */ 58 mr %r5,%r6 /* &oset */ 59 addi %r5,%r5,4 60 li %r0, SYS_sigprocmask /*sigprocmask(SIG_BLOCK, NULL, &oset)*/ 61 sc /*assume no error XXX */ 62 mflr %r11 /* r11 <- link reg */ 63 mfcr %r12 /* r12 <- condition reg */ 64 mr %r10,%r1 /* r10 <- stackptr */ 65 mr %r9,%r2 /* r9 <- global ptr */ 66 67 std %r9,40 + 0*8(%r6) 68 stfd %f14,40 + 23*8(%r6) 69 std %r10,40 + 1*8(%r6) 70 stfd %f15,40 + 24*8(%r6) 71 std %r11,40 + 2*8(%r6) 72 stfd %f16,40 + 25*8(%r6) 73 std %r12,40 + 3*8(%r6) 74 stfd %f17,40 + 26*8(%r6) 75 std %r13,40 + 4*8(%r6) 76 stfd %f18,40 + 27*8(%r6) 77 std %r14,40 + 5*8(%r6) 78 stfd %f19,40 + 28*8(%r6) 79 std %r15,40 + 6*8(%r6) 80 stfd %f20,40 + 29*8(%r6) 81 std %r16,40 + 7*8(%r6) 82 stfd %f21,40 + 30*8(%r6) 83 std %r17,40 + 8*8(%r6) 84 stfd %f22,40 + 31*8(%r6) 85 std %r18,40 + 9*8(%r6) 86 stfd %f23,40 + 32*8(%r6) 87 std %r19,40 + 10*8(%r6) 88 stfd %f24,40 + 33*8(%r6) 89 std %r20,40 + 11*8(%r6) 90 stfd %f25,40 + 34*8(%r6) 91 std %r21,40 + 12*8(%r6) 92 stfd %f26,40 + 35*8(%r6) 93 std %r22,40 + 13*8(%r6) 94 stfd %f27,40 + 36*8(%r6) 95 std %r23,40 + 14*8(%r6) 96 stfd %f28,40 + 37*8(%r6) 97 std %r24,40 + 15*8(%r6) 98 stfd %f29,40 + 38*8(%r6) 99 std %r25,40 + 16*8(%r6) 100 stfd %f30,40 + 39*8(%r6) 101 std %r26,40 + 17*8(%r6) 102 stfd %f31,40 + 40*8(%r6) 103 std %r27,40 + 18*8(%r6) 104 std %r28,40 + 19*8(%r6) 105 std %r29,40 + 20*8(%r6) 106 std %r30,40 + 21*8(%r6) 107 std %r31,40 + 22*8(%r6) 108 109 /* XXX Altivec regs */ 110 111 li %r3,0 /* return (0) */ 112 blr 113END(setjmp) 114 115 WEAK_REFERENCE(__longjmp, longjmp) 116ENTRY(__longjmp) 117 ld %r9,40 + 0*8(%r3) 118 lfd %f14,40 + 23*8(%r3) 119 ld %r10,40 + 1*8(%r3) 120 lfd %f15,40 + 24*8(%r3) 121 ld %r11,40 + 2*8(%r3) 122 lfd %f16,40 + 25*8(%r3) 123 ld %r12,40 + 3*8(%r3) 124 lfd %f17,40 + 26*8(%r3) 125 ld %r14,40 + 5*8(%r3) 126 lfd %f18,40 + 27*8(%r3) 127 ld %r15,40 + 6*8(%r3) 128 lfd %f19,40 + 28*8(%r3) 129 ld %r16,40 + 7*8(%r3) 130 lfd %f20,40 + 29*8(%r3) 131 ld %r17,40 + 8*8(%r3) 132 lfd %f21,40 + 30*8(%r3) 133 ld %r18,40 + 9*8(%r3) 134 lfd %f22,40 + 31*8(%r3) 135 ld %r19,40 + 10*8(%r3) 136 lfd %f23,40 + 32*8(%r3) 137 ld %r20,40 + 11*8(%r3) 138 lfd %f24,40 + 33*8(%r3) 139 ld %r21,40 + 12*8(%r3) 140 lfd %f25,40 + 34*8(%r3) 141 ld %r22,40 + 13*8(%r3) 142 lfd %f26,40 + 35*8(%r3) 143 ld %r23,40 + 14*8(%r3) 144 lfd %f27,40 + 36*8(%r3) 145 ld %r24,40 + 15*8(%r3) 146 lfd %f28,40 + 37*8(%r3) 147 ld %r25,40 + 16*8(%r3) 148 lfd %f29,40 + 38*8(%r3) 149 ld %r26,40 + 17*8(%r3) 150 lfd %f30,40 + 39*8(%r3) 151 ld %r27,40 + 18*8(%r3) 152 lfd %f31,40 + 40*8(%r3) 153 ld %r28,40 + 19*8(%r3) 154 ld %r29,40 + 20*8(%r3) 155 ld %r30,40 + 21*8(%r3) 156 ld %r31,40 + 22*8(%r3) 157 mr %r6,%r4 /* save val param */ 158 mtlr %r11 /* r11 -> link reg */ 159 mtcr %r12 /* r12 -> condition reg */ 160 mr %r2,%r9 /* r9 -> global ptr */ 161 mr %r1,%r10 /* r10 -> stackptr */ 162 mr %r4,%r3 163 li %r3,3 /* SIG_SETMASK */ 164 addi %r4,%r4,4 /* &set */ 165 li %r5,0 /* oset = NULL */ 166 li %r0,SYS_sigprocmask /* sigprocmask(SIG_SET, &set, NULL) */ 167 sc /* assume no error XXX */ 168 or. %r3,%r6,%r6 169 bnelr 170 li %r3,1 171 blr 172END(__longjmp) 173 174 .section .note.GNU-stack,"",%progbits 175