setjmp.S revision 279784
1193323Sed/*- 2193323Sed * Copyright (c) 2002 Peter Grehan. 3193323Sed * All rights reserved. 4193323Sed * 5193323Sed * Redistribution and use in source and binary forms, with or without 6193323Sed * modification, are permitted provided that the following conditions 7193323Sed * are met: 8193323Sed * 1. Redistributions of source code must retain the above copyright 9193323Sed * notice, this list of conditions and the following disclaimer. 10193323Sed * 2. Redistributions in binary form must reproduce the above copyright 11193323Sed * notice, this list of conditions and the following disclaimer in the 12193323Sed * documentation and/or other materials provided with the distribution. 13193323Sed * 14193323Sed * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15193323Sed * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16193323Sed * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17193323Sed * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18193323Sed * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19193323Sed * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20193323Sed * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21193323Sed * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22193323Sed * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23193323Sed * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24193323Sed * SUCH DAMAGE. 25193323Sed */ 26193323Sed/* $NetBSD: setjmp.S,v 1.3 1998/10/03 12:30:38 tsubai Exp $ */ 27193323Sed 28193323Sed#include <machine/asm.h> 29193323Sed__FBSDID("$FreeBSD: head/lib/libc/powerpc/gen/setjmp.S 279784 2015-03-08 19:37:08Z nwhitehorn $"); 30193323Sed 31193323Sed#include <sys/syscall.h> 32193323Sed 33193323Sed/* 34193323Sed * C library -- setjmp, longjmp 35193323Sed * 36193323Sed * longjmp(a,v) 37193323Sed * will generate a "return(v?v:1)" from the last call to 38193323Sed * setjmp(a) 39193323Sed * by restoring registers from the stack. 40193323Sed * The previous signal state is restored. 41193323Sed * 42193323Sed * jmpbuf layout: 43193323Sed * +------------+ 44193323Sed * | unused | 45193323Sed * +------------+ 46193323Sed * | sig state | 47193323Sed * | | 48193323Sed * | (4 words) | 49193323Sed * | | 50193323Sed * +------------+ 51193323Sed * | saved regs | 52193323Sed * | ... | 53193323Sed */ 54193323Sed 55193323SedENTRY(setjmp) 56193323Sed mr %r6,%r3 57193323Sed li %r3,1 /* SIG_BLOCK, but doesn't matter */ 58193323Sed /* since set == NULL */ 59193323Sed li %r4,0 /* set = NULL */ 60193323Sed mr %r5,%r6 /* &oset */ 61193323Sed addi %r5,%r5,4 62193323Sed li %r0, SYS_sigprocmask /*sigprocmask(SIG_BLOCK, NULL, &oset)*/ 63193323Sed sc /*assume no error XXX */ 64193323Sed mflr %r11 /* r11 <- link reg */ 65193323Sed mfcr %r12 /* r12 <- condition reg */ 66193323Sed mr %r10,%r1 /* r10 <- stackptr */ 67193323Sed mr %r9,%r2 /* r9 <- global ptr */ 68193323Sed stmw %r9,20(%r6) 69193323Sed 70193323Sed /* FPRs */ 71193323Sed stfd %f14,92+0*8(%r6) 72193323Sed stfd %f15,92+1*8(%r6) 73193323Sed stfd %f16,92+2*8(%r6) 74193323Sed stfd %f17,92+3*8(%r6) 75193323Sed stfd %f18,92+4*8(%r6) 76193323Sed stfd %f19,92+5*8(%r6) 77193323Sed stfd %f20,92+6*8(%r6) 78193323Sed stfd %f21,92+7*8(%r6) 79193323Sed stfd %f22,92+8*8(%r6) 80193323Sed stfd %f23,92+9*8(%r6) 81193323Sed stfd %f24,92+10*8(%r6) 82193323Sed stfd %f25,92+11*8(%r6) 83193323Sed stfd %f26,92+12*8(%r6) 84193323Sed stfd %f27,92+13*8(%r6) 85 stfd %f28,93+13*8(%r6) 86 stfd %f29,93+14*8(%r6) 87 stfd %f30,93+15*8(%r6) 88 stfd %f31,93+16*8(%r6) 89 90 li %r3,0 /* return (0) */ 91 blr 92END(setjmp) 93 94 WEAK_REFERENCE(CNAME(__longjmp), longjmp) 95ENTRY(__longjmp) 96 lmw %r9,20(%r3) /* restore regs */ 97 98 /* FPRs */ 99 lfd %f14,92+0*8(%r3) 100 lfd %f15,92+1*8(%r3) 101 lfd %f16,92+2*8(%r3) 102 lfd %f17,92+3*8(%r3) 103 lfd %f18,92+4*8(%r3) 104 lfd %f19,92+5*8(%r3) 105 lfd %f20,92+6*8(%r3) 106 lfd %f21,92+7*8(%r3) 107 lfd %f22,92+8*8(%r3) 108 lfd %f23,92+9*8(%r3) 109 lfd %f24,92+10*8(%r3) 110 lfd %f25,92+11*8(%r3) 111 lfd %f26,92+12*8(%r3) 112 lfd %f27,92+13*8(%r3) 113 lfd %f28,93+13*8(%r3) 114 lfd %f29,93+14*8(%r3) 115 lfd %f30,93+15*8(%r3) 116 lfd %f31,93+16*8(%r3) 117 118 mr %r6,%r4 /* save val param */ 119 mtlr %r11 /* r11 -> link reg */ 120 mtcr %r12 /* r12 -> condition reg */ 121 mr %r1,%r10 /* r10 -> stackptr */ 122 mr %r4,%r3 123 li %r3,3 /* SIG_SETMASK */ 124 addi %r4,%r4,4 /* &set */ 125 li %r5,0 /* oset = NULL */ 126 li %r0,SYS_sigprocmask /* sigprocmask(SIG_SET, &set, NULL) */ 127 sc /* assume no error XXX */ 128 or. %r3,%r6,%r6 129 bnelr 130 li %r3,1 131 blr 132END(__longjmp) 133 134 .section .note.GNU-stack,"",%progbits 135