1/* $NetBSD: _setjmp.S,v 1.8 2008/04/28 20:22:57 martin 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#include <machine/asm.h> 33#include <machine/trap.h> 34 35#if defined(LIBC_SCCS) && !defined(lint) 36RCSID("$NetBSD: _setjmp.S,v 1.8 2008/04/28 20:22:57 martin Exp $") 37#endif /* LIBC_SCCS and not lint */ 38 39/* 40 * C library -- _setjmp, _longjmp 41 * 42 * _longjmp(a,v) 43 * will generate a "return(v?v:1)" from 44 * the last call to 45 * _setjmp(a) 46 * The previous signal state is NOT restored. 47 */ 48 49ENTRY(_setjmp) 50 st %sp, [%o0+0] /* store caller's stack pointer */ 51 st %o7, [%o0+4] /* and the return pc */ 52 retl 53 clr %o0 ! return 0 54 55ENTRY(_longjmp) 56 sub %sp, 64, %sp ! set up a local stack frame 57 tst %o1 ! compute v ? v : 1 58 be,a 0f 59 mov 1, %o1 600: 61 t ST_FLUSHWIN ! flush register windows out to the stack 62 63 /* 64 * We restore the saved stack pointer to %fp, then issue 65 * a `restore' instruction which will reload the register 66 * window from the stack. 67 */ 68 ld [%o0+4], %o7 /* restore return pc */ 69 ld [%o0+0], %fp /* and stack pointer */ 70 71 retl ! success, return %o1 72 restore %o1, 0, %o0 73