1/*- 2 * Copyright (c) 2016 Justin Hibbits 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 evstdd %r9,24+0*8(%r6) 67 evstdd %r10,24+1*8(%r6) 68 evstdd %r11,24+2*8(%r6) 69 evstdd %r12,24+3*8(%r6) 70 evstdd %r13,24+4*8(%r6) 71 evstdd %r14,24+5*8(%r6) 72 evstdd %r15,24+6*8(%r6) 73 evstdd %r16,24+7*8(%r6) 74 evstdd %r17,24+8*8(%r6) 75 evstdd %r18,24+9*8(%r6) 76 evstdd %r19,24+10*8(%r6) 77 evstdd %r20,24+11*8(%r6) 78 evstdd %r21,24+12*8(%r6) 79 evstdd %r22,24+13*8(%r6) 80 evstdd %r23,24+14*8(%r6) 81 evstdd %r24,24+15*8(%r6) 82 evstdd %r25,24+16*8(%r6) 83 evstdd %r26,24+17*8(%r6) 84 evstdd %r27,24+18*8(%r6) 85 evstdd %r28,24+19*8(%r6) 86 evstdd %r29,24+20*8(%r6) 87 evstdd %r30,24+21*8(%r6) 88 evstdd %r31,24+22*8(%r6) 89 90 li %r3,0 /* return (0) */ 91 blr 92END(setjmp) 93 94 WEAK_REFERENCE(CNAME(__longjmp), longjmp) 95ENTRY(__longjmp) 96 evldd %r9,24+0*8(%r3) 97 evldd %r10,24+1*8(%r3) 98 evldd %r11,24+2*8(%r3) 99 evldd %r12,24+3*8(%r3) 100 evldd %r13,24+4*8(%r3) 101 evldd %r14,24+5*8(%r3) 102 evldd %r15,24+6*8(%r3) 103 evldd %r16,24+7*8(%r3) 104 evldd %r17,24+8*8(%r3) 105 evldd %r18,24+9*8(%r3) 106 evldd %r19,24+10*8(%r3) 107 evldd %r20,24+11*8(%r3) 108 evldd %r21,24+12*8(%r3) 109 evldd %r22,24+13*8(%r3) 110 evldd %r23,24+14*8(%r3) 111 evldd %r24,24+15*8(%r3) 112 evldd %r25,24+16*8(%r3) 113 evldd %r26,24+17*8(%r3) 114 evldd %r27,24+18*8(%r3) 115 evldd %r28,24+19*8(%r3) 116 evldd %r29,24+20*8(%r3) 117 evldd %r30,24+21*8(%r3) 118 evldd %r31,24+22*8(%r3) 119 120 mr %r6,%r4 /* save val param */ 121 mtlr %r11 /* r11 -> link reg */ 122 mtcr %r12 /* r12 -> condition reg */ 123 mr %r1,%r10 /* r10 -> stackptr */ 124 mr %r4,%r3 125 li %r3,3 /* SIG_SETMASK */ 126 addi %r4,%r4,4 /* &set */ 127 li %r5,0 /* oset = NULL */ 128 li %r0,SYS_sigprocmask /* sigprocmask(SIG_SET, &set, NULL) */ 129 sc /* assume no error XXX */ 130 or. %r3,%r6,%r6 131 bnelr 132 li %r3,1 133 blr 134END(__longjmp) 135 136 .section .note.GNU-stack,"",%progbits 137