_setjmp.S revision 1.2.2.1
1 1.2.2.1 jtc /* $NetBSD: _setjmp.S,v 1.2.2.1 1996/09/16 18:38:51 jtc Exp $ */ 2 1.2 thorpej 3 1.1 paulus /*- 4 1.1 paulus * Copyright (c) 1990 The Regents of the University of California. 5 1.1 paulus * All rights reserved. 6 1.1 paulus * 7 1.1 paulus * This code is derived from software contributed to Berkeley by 8 1.1 paulus * the Systems Programming Group of the University of Utah Computer 9 1.1 paulus * Science Department. 10 1.1 paulus * 11 1.1 paulus * Redistribution and use in source and binary forms, with or without 12 1.1 paulus * modification, are permitted provided that the following conditions 13 1.1 paulus * are met: 14 1.1 paulus * 1. Redistributions of source code must retain the above copyright 15 1.1 paulus * notice, this list of conditions and the following disclaimer. 16 1.1 paulus * 2. Redistributions in binary form must reproduce the above copyright 17 1.1 paulus * notice, this list of conditions and the following disclaimer in the 18 1.1 paulus * documentation and/or other materials provided with the distribution. 19 1.1 paulus * 3. All advertising materials mentioning features or use of this software 20 1.1 paulus * must display the following acknowledgement: 21 1.1 paulus * This product includes software developed by the University of 22 1.1 paulus * California, Berkeley and its contributors. 23 1.1 paulus * 4. Neither the name of the University nor the names of its contributors 24 1.1 paulus * may be used to endorse or promote products derived from this software 25 1.1 paulus * without specific prior written permission. 26 1.1 paulus * 27 1.1 paulus * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 1.1 paulus * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 1.1 paulus * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 1.1 paulus * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 1.1 paulus * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 1.1 paulus * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 1.1 paulus * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 1.1 paulus * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 1.1 paulus * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 1.1 paulus * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 1.1 paulus * SUCH DAMAGE. 38 1.1 paulus */ 39 1.1 paulus 40 1.2.2.1 jtc #include <machine/asm.h> 41 1.2 thorpej 42 1.1 paulus #if defined(LIBC_SCCS) && !defined(lint) 43 1.2 thorpej #if 0 44 1.2 thorpej RCSID("from: @(#)_setjmp.s 5.1 (Berkeley) 5/12/90") 45 1.2 thorpej #else 46 1.2.2.1 jtc RCSID("$NetBSD: _setjmp.S,v 1.2.2.1 1996/09/16 18:38:51 jtc Exp $") 47 1.2 thorpej #endif 48 1.1 paulus #endif /* LIBC_SCCS and not lint */ 49 1.1 paulus 50 1.1 paulus /* 51 1.1 paulus * C library -- _setjmp, _longjmp 52 1.1 paulus * 53 1.1 paulus * _longjmp(a,v) 54 1.1 paulus * will generate a "return(v)" from 55 1.1 paulus * the last call to 56 1.1 paulus * _setjmp(a) 57 1.1 paulus * by restoring registers from the stack, 58 1.1 paulus * The previous signal state is NOT restored. 59 1.1 paulus */ 60 1.1 paulus 61 1.1 paulus ENTRY(_setjmp) 62 1.1 paulus movl sp@(4),a0 /* save area pointer */ 63 1.1 paulus clrl a0@+ /* no old onstack */ 64 1.1 paulus clrl a0@+ /* no old sigmask */ 65 1.1 paulus movl sp,a0@+ /* save old SP */ 66 1.1 paulus movl a6,a0@+ /* save old FP */ 67 1.1 paulus clrl a0@+ /* no old AP */ 68 1.1 paulus movl sp@,a0@+ /* save old PC */ 69 1.1 paulus clrl a0@+ /* clear PS */ 70 1.1 paulus moveml #0x3CFC,a0@ /* save other non-scratch regs */ 71 1.1 paulus clrl d0 /* return zero */ 72 1.1 paulus rts 73 1.1 paulus 74 1.1 paulus ENTRY(_longjmp) 75 1.1 paulus movl sp@(4),a0 /* save area pointer */ 76 1.1 paulus addql #8,a0 /* skip onstack/sigmask */ 77 1.1 paulus tstl a0@ /* ensure non-zero SP */ 78 1.1 paulus jeq botch /* oops! */ 79 1.1 paulus movl sp@(8),d0 /* grab return value */ 80 1.1 paulus jne ok /* non-zero ok */ 81 1.1 paulus moveq #1,d0 /* else make non-zero */ 82 1.1 paulus ok: 83 1.1 paulus movl a0@+,sp /* restore SP */ 84 1.1 paulus movl a0@+,a6 /* restore FP */ 85 1.1 paulus addql #4,a0 /* skip AP */ 86 1.1 paulus movl a0@+,sp@ /* restore PC */ 87 1.1 paulus moveml a0@(4),#0x3CFC /* restore non-scratch regs */ 88 1.1 paulus rts 89 1.1 paulus 90 1.1 paulus botch: 91 1.1 paulus jbsr _longjmperror 92 1.1 paulus stop #0 93
Indexes created Tue Oct 07 21:09:53 GMT 2025