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: sigsetjmp.S,v 1.4 1998/10/03 12:30:38 tsubai Exp $ */ 27 28#include <machine/asm.h> 29/* 30 * C library -- sigsetjmp, siglongjmp 31 * 32 * siglongjmp(a,v) 33 * will generate a "return(v?v:1)" from the last call to 34 * sigsetjmp(a, savemask) 35 * by restoring registers from the stack. 36 * The previous signal state is restored if savemask is non-zero 37 * 38 * jmpbuf layout: 39 * +------------+ 40 * | savemask | 41 * +------------+ 42 * | sig state | 43 * | | 44 * | (4 words) | 45 * | | 46 * +------------+ 47 * | saved regs | 48 * | ... | 49 */ 50 51 52#include <sys/syscall.h> 53 54ENTRY(sigsetjmp) 55 mr %r6,%r3 56 stw %r4,0(%r3) 57 or. %r7,%r4,%r4 58 beq 1f 59 li %r3,1 /* SIG_BLOCK, but doesn't matter */ 60 /* since set == NULL */ 61 li %r4,0 /* set = NULL */ 62 mr %r5,%r6 /* &oset */ 63 addi %r5,%r5,4 64 li %r0, SYS_sigprocmask /* sigprocmask(SIG_BLOCK, NULL, &oset)*/ 65 sc /* assume no error XXX */ 661: 67 mflr %r11 68 mfcr %r12 69 mr %r10,%r1 70 mr %r9,%r2 71 72 /* FPRs */ 73 evstdd %r9,24+0*8(%r6) 74 evstdd %r10,24+1*8(%r6) 75 evstdd %r11,24+2*8(%r6) 76 evstdd %r12,24+3*8(%r6) 77 evstdd %r13,24+4*8(%r6) 78 evstdd %r14,24+5*8(%r6) 79 evstdd %r15,24+6*8(%r6) 80 evstdd %r16,24+7*8(%r6) 81 evstdd %r17,24+8*8(%r6) 82 evstdd %r18,24+9*8(%r6) 83 evstdd %r19,24+10*8(%r6) 84 evstdd %r20,24+11*8(%r6) 85 evstdd %r21,24+12*8(%r6) 86 evstdd %r22,24+13*8(%r6) 87 evstdd %r23,24+14*8(%r6) 88 evstdd %r24,24+15*8(%r6) 89 evstdd %r25,24+16*8(%r6) 90 evstdd %r26,24+17*8(%r6) 91 evstdd %r27,24+18*8(%r6) 92 evstdd %r28,24+19*8(%r6) 93 evstdd %r29,24+20*8(%r6) 94 evstdd %r30,24+21*8(%r6) 95 evstdd %r31,24+22*8(%r6) 96 97 li %r3,0 98 blr 99END(sigsetjmp) 100 101ENTRY(siglongjmp) 102 103 /* FPRs */ 104 evldd %r9,24+0*8(%r3) 105 evldd %r10,24+1*8(%r3) 106 evldd %r11,24+2*8(%r3) 107 evldd %r12,24+3*8(%r3) 108 evldd %r13,24+4*8(%r3) 109 evldd %r14,24+5*8(%r3) 110 evldd %r15,24+6*8(%r3) 111 evldd %r16,24+7*8(%r3) 112 evldd %r17,24+8*8(%r3) 113 evldd %r18,24+9*8(%r3) 114 evldd %r19,24+10*8(%r3) 115 evldd %r20,24+11*8(%r3) 116 evldd %r21,24+12*8(%r3) 117 evldd %r22,24+13*8(%r3) 118 evldd %r23,24+14*8(%r3) 119 evldd %r24,24+15*8(%r3) 120 evldd %r25,24+16*8(%r3) 121 evldd %r26,24+17*8(%r3) 122 evldd %r27,24+18*8(%r3) 123 evldd %r28,24+19*8(%r3) 124 evldd %r29,24+20*8(%r3) 125 evldd %r30,24+21*8(%r3) 126 evldd %r31,24+22*8(%r3) 127 128 lwz %r7,0(%r3) 129 mr %r6,%r4 130 mtlr %r11 131 mtcr %r12 132 mr %r1,%r10 133 or. %r7,%r7,%r7 134 beq 1f 135 mr %r4,%r3 136 li %r3,3 /* SIG_SETMASK */ 137 addi %r4,%r4,4 /* &set */ 138 li %r5,0 /* oset = NULL */ 139 li %r0,SYS_sigprocmask /* sigprocmask(SIG_SET, &set, NULL) */ 140 sc /* assume no error XXX */ 1411: 142 or. %r3,%r6,%r6 143 bnelr 144 li %r3,1 145 blr 146END(siglongjmp) 147 148 .section .note.GNU-stack,"",%progbits 149