1107571Sgrehan/*- 2107571Sgrehan * Copyright (c) 2002 Peter Grehan. 3107571Sgrehan * All rights reserved. 4107571Sgrehan * 5107571Sgrehan * Redistribution and use in source and binary forms, with or without 6107571Sgrehan * modification, are permitted provided that the following conditions 7107571Sgrehan * are met: 8107571Sgrehan * 1. Redistributions of source code must retain the above copyright 9107571Sgrehan * notice, this list of conditions and the following disclaimer. 10107571Sgrehan * 2. Redistributions in binary form must reproduce the above copyright 11107571Sgrehan * notice, this list of conditions and the following disclaimer in the 12107571Sgrehan * documentation and/or other materials provided with the distribution. 13107571Sgrehan * 14107571Sgrehan * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15107571Sgrehan * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16107571Sgrehan * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17107571Sgrehan * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18107571Sgrehan * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19107571Sgrehan * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20107571Sgrehan * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21107571Sgrehan * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22107571Sgrehan * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23107571Sgrehan * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24107571Sgrehan * SUCH DAMAGE. 25107571Sgrehan */ 26107571Sgrehan/* $NetBSD: setjmp.S,v 1.3 1998/10/03 12:30:38 tsubai Exp $ */ 27107571Sgrehan 28107571Sgrehan#include <machine/asm.h> 29107571Sgrehan__FBSDID("$FreeBSD$"); 30107571Sgrehan 31107571Sgrehan#include <sys/syscall.h> 32107571Sgrehan 33107571Sgrehan/* 34107571Sgrehan * C library -- setjmp, longjmp 35107571Sgrehan * 36107571Sgrehan * longjmp(a,v) 37107571Sgrehan * will generate a "return(v?v:1)" from the last call to 38107571Sgrehan * setjmp(a) 39107571Sgrehan * by restoring registers from the stack. 40107571Sgrehan * The previous signal state is restored. 41107571Sgrehan * 42107571Sgrehan * jmpbuf layout: 43107571Sgrehan * +------------+ 44107571Sgrehan * | unused | 45107571Sgrehan * +------------+ 46107571Sgrehan * | sig state | 47107571Sgrehan * | | 48107571Sgrehan * | (4 words) | 49107571Sgrehan * | | 50107571Sgrehan * +------------+ 51107571Sgrehan * | saved regs | 52107571Sgrehan * | ... | 53107571Sgrehan */ 54107571Sgrehan 55107571SgrehanENTRY(setjmp) 56107571Sgrehan mr %r6,%r3 57107571Sgrehan li %r3,1 /* SIG_BLOCK, but doesn't matter */ 58107571Sgrehan /* since set == NULL */ 59107571Sgrehan li %r4,0 /* set = NULL */ 60107571Sgrehan mr %r5,%r6 /* &oset */ 61107571Sgrehan addi %r5,%r5,4 62107571Sgrehan li %r0, SYS_sigprocmask /*sigprocmask(SIG_BLOCK, NULL, &oset)*/ 63107571Sgrehan sc /*assume no error XXX */ 64107571Sgrehan mflr %r11 /* r11 <- link reg */ 65107571Sgrehan mfcr %r12 /* r12 <- condition reg */ 66107571Sgrehan mr %r10,%r1 /* r10 <- stackptr */ 67107571Sgrehan mr %r9,%r2 /* r9 <- global ptr */ 68107571Sgrehan stmw %r9,20(%r6) 69107571Sgrehan li %r3,0 /* return (0) */ 70107571Sgrehan blr 71107571Sgrehan 72107571Sgrehan .weak CNAME(longjmp) 73107571Sgrehan .set CNAME(longjmp),CNAME(__longjmp) 74107571SgrehanENTRY(__longjmp) 75107571Sgrehan lmw %r9,20(%r3) /* restore regs */ 76107571Sgrehan mr %r6,%r4 /* save val param */ 77107571Sgrehan mtlr %r11 /* r11 -> link reg */ 78107571Sgrehan mtcr %r12 /* r12 -> condition reg */ 79107571Sgrehan mr %r1,%r10 /* r10 -> stackptr */ 80107571Sgrehan mr %r4,%r3 81107571Sgrehan li %r3,3 /* SIG_SETMASK */ 82107571Sgrehan addi %r4,%r4,4 /* &set */ 83107571Sgrehan li %r5,0 /* oset = NULL */ 84107571Sgrehan li %r0,SYS_sigprocmask /* sigprocmask(SIG_SET, &set, NULL) */ 85107571Sgrehan sc /* assume no error XXX */ 86107571Sgrehan or. %r3,%r6,%r6 87107571Sgrehan bnelr 88107571Sgrehan li %r3,1 89107571Sgrehan blr 90107571Sgrehan 91217398Skib .section .note.GNU-stack,"",%progbits 92