1/* 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This software was developed by the Computer Systems Engineering group 6 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 7 * contributed to Berkeley. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * from: Header: _setjmp.s,v 1.1 91/07/06 16:45:53 torek Exp 38 * $Id: _setjmp.S,v 1.1 1993/10/07 00:21:26 cgd Exp $ 39 */ 40 41#if defined(LIBC_SCCS) && !defined(lint) 42 .asciz "@(#)_setjmp.s 8.1 (Berkeley) 6/4/93" 43#endif /* LIBC_SCCS and not lint */ 44 45/* 46 * C library -- _setjmp, _longjmp 47 * 48 * _longjmp(a,v) 49 * will generate a "return(v?v:1)" from 50 * the last call to 51 * _setjmp(a) 52 * by unwinding the call stack. 53 * The previous signal state is NOT restored. 54 */ 55 56#include "DEFS.h" 57 58ENTRY(_setjmp) 59 std %sp, [%o0+0] /* caller's stack pointer and return pc */ 60 st %fp, [%o0+8] /* store caller's frame pointer */ 61 retl 62 clr %o0 ! return 0 63 64ENTRY(_longjmp) 65 addcc %o1, %g0, %g6 ! compute v ? v : 1 in a global register 66 be,a 0f 67 mov 1, %g6 680: 69 mov %o0, %g1 ! save a in another global register 70 ld [%g1+8], %g7 /* get caller's frame */ 711: 72 cmp %fp, %g7 ! compare against desired frame 73 bl,a 1b ! if below, 74 restore ! pop frame and loop 75 be,a 2f ! if there, 76 ldd [%g1+0], %o2 ! fetch return %sp and pc, and get out 77 78Lbotch: 79 call _longjmperror ! otherwise, went too far; bomb out 80 nop 81 unimp 0 82 832: 84 cmp %o2, %sp ! %sp must not decrease 85 bge,a 3f 86 mov %o2, %sp ! it is OK, put it in place 87 b,a Lbotch 883: 89 jmp %o3 + 8 ! success, return %g6 90 mov %g6, %o0 91