1/* $NetBSD: _setjmp.S,v 1.6 1999/06/27 11:10:18 pk Exp $ */ 2 3/*- 4 * Copyright (c) 1999 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Paul Kranenburg. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39#include <machine/asm.h> 40#include <machine/trap.h> 41 42#if defined(LIBC_SCCS) && !defined(lint) 43RCSID("$NetBSD: _setjmp.S,v 1.6 1999/06/27 11:10:18 pk Exp $") 44#endif /* LIBC_SCCS and not lint */ 45 46/* 47 * C library -- _setjmp, _longjmp 48 * 49 * _longjmp(a,v) 50 * will generate a "return(v?v:1)" from 51 * the last call to 52 * _setjmp(a) 53 * The previous signal state is NOT restored. 54 */ 55 56ENTRY(_setjmp) 57 st %sp, [%o0+0] /* store caller's stack pointer */ 58 st %o7, [%o0+4] /* and the return pc */ 59 retl 60 clr %o0 ! return 0 61 62ENTRY(_longjmp) 63 sub %sp, 64, %sp ! set up a local stack frame 64 tst %o1 ! compute v ? v : 1 65 be,a 0f 66 mov 1, %o1 670: 68 t ST_FLUSHWIN ! flush register windows out to the stack 69 70 /* 71 * We restore the saved stack pointer to %fp, then issue 72 * a `restore' instruction which will reload the register 73 * window from the stack. 74 */ 75 ld [%o0+4], %o7 /* restore return pc */ 76 ld [%o0+0], %fp /* and stack pointer */ 77 78 retl ! success, return %g6 79 restore %o1, 0, %o0 80