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: sigsetjmp.S,v 1.4 1998/10/03 12:30:38 tsubai Exp $ */ 27 28#include <machine/asm.h> 29__FBSDID("$FreeBSD$"); 30 31/* 32 * C library -- sigsetjmp, siglongjmp 33 * 34 * siglongjmp(a,v) 35 * will generate a "return(v?v:1)" from the last call to 36 * sigsetjmp(a, savemask) 37 * by restoring registers from the stack. 38 * The previous signal state is restored if savemask is non-zero 39 * 40 * jmpbuf layout: 41 * +------------+ 42 * | savemask | 43 * +------------+ 44 * | sig state | 45 * | | 46 * | (4 words) | 47 * | | 48 * +------------+ 49 * | saved regs | 50 * | ... | 51 */ 52 53 54#include <sys/syscall.h> 55 56ENTRY(sigsetjmp) 57 mr %r6,%r3 58 stw %r4,0(%r3) 59 or. %r7,%r4,%r4 60 beq 1f 61 li %r3,1 /* SIG_BLOCK, but doesn't matter */ 62 /* since set == NULL */ 63 li %r4,0 /* set = NULL */ 64 mr %r5,%r6 /* &oset */ 65 addi %r5,%r5,4 66 li %r0, SYS_sigprocmask /* sigprocmask(SIG_BLOCK, NULL, &oset)*/ 67 sc /* assume no error XXX */ 681: 69 mflr %r11 70 mfcr %r12 71 mr %r10,%r1 72 mr %r9,%r2 73 74 std %r9,40 + 0*8(%r6) 75 std %r10,40 + 1*8(%r6) 76 std %r11,40 + 2*8(%r6) 77 std %r12,40 + 3*8(%r6) 78 std %r13,40 + 4*8(%r6) 79 std %r14,40 + 5*8(%r6) 80 std %r15,40 + 6*8(%r6) 81 std %r16,40 + 7*8(%r6) 82 std %r17,40 + 8*8(%r6) 83 std %r18,40 + 9*8(%r6) 84 std %r19,40 + 10*8(%r6) 85 std %r20,40 + 11*8(%r6) 86 std %r21,40 + 12*8(%r6) 87 std %r22,40 + 13*8(%r6) 88 std %r23,40 + 14*8(%r6) 89 std %r24,40 + 15*8(%r6) 90 std %r25,40 + 16*8(%r6) 91 std %r26,40 + 17*8(%r6) 92 std %r27,40 + 18*8(%r6) 93 std %r28,40 + 19*8(%r6) 94 std %r29,40 + 20*8(%r6) 95 std %r30,40 + 21*8(%r6) 96 std %r31,40 + 22*8(%r6) 97 98 li %r3,0 99 blr 100 101ENTRY(siglongjmp) 102 ld %r9,40 + 0*8(%r3) 103 ld %r10,40 + 1*8(%r3) 104 ld %r11,40 + 2*8(%r3) 105 ld %r12,40 + 3*8(%r3) 106 ld %r14,40 + 5*8(%r3) 107 ld %r15,40 + 6*8(%r3) 108 ld %r16,40 + 7*8(%r3) 109 ld %r17,40 + 8*8(%r3) 110 ld %r18,40 + 9*8(%r3) 111 ld %r19,40 + 10*8(%r3) 112 ld %r20,40 + 11*8(%r3) 113 ld %r21,40 + 12*8(%r3) 114 ld %r22,40 + 13*8(%r3) 115 ld %r23,40 + 14*8(%r3) 116 ld %r24,40 + 15*8(%r3) 117 ld %r25,40 + 16*8(%r3) 118 ld %r26,40 + 17*8(%r3) 119 ld %r27,40 + 18*8(%r3) 120 ld %r28,40 + 19*8(%r3) 121 ld %r29,40 + 20*8(%r3) 122 ld %r30,40 + 21*8(%r3) 123 ld %r31,40 + 22*8(%r3) 124 125 lwz %r7,0(%r3) 126 mr %r6,%r4 127 mtlr %r11 128 mtcr %r12 129 mr %r2,%r9 130 mr %r1,%r10 131 or. %r7,%r7,%r7 132 beq 1f 133 mr %r4,%r3 134 li %r3,3 /* SIG_SETMASK */ 135 addi %r4,%r4,4 /* &set */ 136 li %r5,0 /* oset = NULL */ 137 li %r0,SYS_sigprocmask /* sigprocmask(SIG_SET, &set, NULL) */ 138 sc /* assume no error XXX */ 1391: 140 or. %r3,%r6,%r6 141 bnelr 142 li %r3,1 143 blr 144 145 .section .note.GNU-stack,"",%progbits 146