_setjmp.S revision 1.6
1 1.6 pk /* $NetBSD: _setjmp.S,v 1.6 1999/06/27 11:10:18 pk Exp $ */ 2 1.4 christos 3 1.6 pk /*- 4 1.6 pk * Copyright (c) 1999 The NetBSD Foundation, Inc. 5 1.6 pk * All rights reserved. 6 1.1 cgd * 7 1.6 pk * This code is derived from software contributed to The NetBSD Foundation 8 1.6 pk * by Paul Kranenburg. 9 1.1 cgd * 10 1.1 cgd * Redistribution and use in source and binary forms, with or without 11 1.1 cgd * modification, are permitted provided that the following conditions 12 1.1 cgd * are met: 13 1.1 cgd * 1. Redistributions of source code must retain the above copyright 14 1.1 cgd * notice, this list of conditions and the following disclaimer. 15 1.1 cgd * 2. Redistributions in binary form must reproduce the above copyright 16 1.1 cgd * notice, this list of conditions and the following disclaimer in the 17 1.1 cgd * documentation and/or other materials provided with the distribution. 18 1.1 cgd * 3. All advertising materials mentioning features or use of this software 19 1.1 cgd * must display the following acknowledgement: 20 1.6 pk * This product includes software developed by the NetBSD 21 1.6 pk * Foundation, Inc. and its contributors. 22 1.6 pk * 4. Neither the name of The NetBSD Foundation nor the names of its 23 1.6 pk * contributors may be used to endorse or promote products derived 24 1.6 pk * from this software without specific prior written permission. 25 1.1 cgd * 26 1.6 pk * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 1.6 pk * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 1.6 pk * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 1.6 pk * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 1.6 pk * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 1.6 pk * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 1.6 pk * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 1.6 pk * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 1.6 pk * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 1.6 pk * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 1.6 pk * POSSIBILITY OF SUCH DAMAGE. 37 1.1 cgd */ 38 1.1 cgd 39 1.4 christos #include <machine/asm.h> 40 1.6 pk #include <machine/trap.h> 41 1.6 pk 42 1.1 cgd #if defined(LIBC_SCCS) && !defined(lint) 43 1.6 pk RCSID("$NetBSD: _setjmp.S,v 1.6 1999/06/27 11:10:18 pk Exp $") 44 1.1 cgd #endif /* LIBC_SCCS and not lint */ 45 1.1 cgd 46 1.1 cgd /* 47 1.1 cgd * C library -- _setjmp, _longjmp 48 1.1 cgd * 49 1.1 cgd * _longjmp(a,v) 50 1.1 cgd * will generate a "return(v?v:1)" from 51 1.1 cgd * the last call to 52 1.1 cgd * _setjmp(a) 53 1.1 cgd * The previous signal state is NOT restored. 54 1.1 cgd */ 55 1.1 cgd 56 1.1 cgd ENTRY(_setjmp) 57 1.2 pk st %sp, [%o0+0] /* store caller's stack pointer */ 58 1.6 pk st %o7, [%o0+4] /* and the return pc */ 59 1.1 cgd retl 60 1.1 cgd clr %o0 ! return 0 61 1.1 cgd 62 1.1 cgd ENTRY(_longjmp) 63 1.6 pk sub %sp, 64, %sp ! set up a local stack frame 64 1.6 pk tst %o1 ! compute v ? v : 1 65 1.1 cgd be,a 0f 66 1.6 pk mov 1, %o1 67 1.1 cgd 0: 68 1.6 pk t ST_FLUSHWIN ! flush register windows out to the stack 69 1.6 pk 70 1.6 pk /* 71 1.6 pk * We restore the saved stack pointer to %fp, then issue 72 1.6 pk * a `restore' instruction which will reload the register 73 1.6 pk * window from the stack. 74 1.6 pk */ 75 1.6 pk ld [%o0+4], %o7 /* restore return pc */ 76 1.6 pk ld [%o0+0], %fp /* and stack pointer */ 77 1.6 pk 78 1.6 pk retl ! success, return %g6 79 1.6 pk restore %o1, 0, %o0 80
Indexes created Mon Oct 27 04:09:48 GMT 2025