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 stmw %r9,20(%r6) 67 68 /* FPRs */ 69 stfd %f14,112+0*8(%r6) 70 stfd %f15,112+1*8(%r6) 71 stfd %f16,112+2*8(%r6) 72 stfd %f17,112+3*8(%r6) 73 stfd %f18,112+4*8(%r6) 74 stfd %f19,112+5*8(%r6) 75 stfd %f20,112+6*8(%r6) 76 stfd %f21,112+7*8(%r6) 77 stfd %f22,112+8*8(%r6) 78 stfd %f23,112+9*8(%r6) 79 stfd %f24,112+10*8(%r6) 80 stfd %f25,112+11*8(%r6) 81 stfd %f26,112+12*8(%r6) 82 stfd %f27,112+13*8(%r6) 83 stfd %f28,112+14*8(%r6) 84 stfd %f29,112+15*8(%r6) 85 stfd %f30,112+16*8(%r6) 86 stfd %f31,112+17*8(%r6) 87 88 li %r3,0 /* return (0) */ 89 blr 90END(setjmp) 91 92 WEAK_REFERENCE(CNAME(__longjmp), longjmp) 93ENTRY(__longjmp) 94 lmw %r9,20(%r3) /* restore regs */ 95 96 /* FPRs */ 97 lfd %f14,112+0*8(%r3) 98 lfd %f15,112+1*8(%r3) 99 lfd %f16,112+2*8(%r3) 100 lfd %f17,112+3*8(%r3) 101 lfd %f18,112+4*8(%r3) 102 lfd %f19,112+5*8(%r3) 103 lfd %f20,112+6*8(%r3) 104 lfd %f21,112+7*8(%r3) 105 lfd %f22,112+8*8(%r3) 106 lfd %f23,112+9*8(%r3) 107 lfd %f24,112+10*8(%r3) 108 lfd %f25,112+11*8(%r3) 109 lfd %f26,112+12*8(%r3) 110 lfd %f27,112+13*8(%r3) 111 lfd %f28,112+14*8(%r3) 112 lfd %f29,112+15*8(%r3) 113 lfd %f30,112+16*8(%r3) 114 lfd %f31,112+17*8(%r3) 115 116 mr %r6,%r4 /* save val param */ 117 mtlr %r11 /* r11 -> link reg */ 118 mtcr %r12 /* r12 -> condition reg */ 119 mr %r1,%r10 /* r10 -> stackptr */ 120 mr %r4,%r3 121 li %r3,3 /* SIG_SETMASK */ 122 addi %r4,%r4,4 /* &set */ 123 li %r5,0 /* oset = NULL */ 124 li %r0,SYS_sigprocmask /* sigprocmask(SIG_SET, &set, NULL) */ 125 sc /* assume no error XXX */ 126 or. %r3,%r6,%r6 127 bnelr 128 li %r3,1 129 blr 130END(__longjmp) 131 132 .section .note.GNU-stack,"",%progbits 133