1/*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: @(#)_setjmp.s 5.1 (Berkeley) 4/23/90 37 * $Id: _setjmp.S,v 1.4 1995/12/28 20:03:51 jtc Exp $ 38 */ 39 40#include <machine/asm.h> 41 42#if defined(LIBC_SCCS) 43 .text 44 .asciz "$Id: _setjmp.S,v 1.4 1995/12/28 20:03:51 jtc Exp $" 45#endif 46 47/* 48 * C library -- _setjmp, _longjmp 49 * 50 * _longjmp(a,v) 51 * will generate a "return(v)" from the last call to 52 * _setjmp(a) 53 * by restoring registers from the stack. 54 * The previous signal state is NOT restored. 55 */ 56 57ENTRY(_setjmp) 58 movl 4(%esp),%eax 59 movl 0(%esp),%edx 60 movl %edx, 0(%eax) /* rta */ 61 movl %ebx, 4(%eax) 62 movl %esp, 8(%eax) 63 movl %ebp,12(%eax) 64 movl %esi,16(%eax) 65 movl %edi,20(%eax) 66 xorl %eax,%eax 67 ret 68 69ENTRY(_longjmp) 70 movl 4(%esp),%edx 71 movl 8(%esp),%eax 72 movl 0(%edx),%ecx 73 movl 4(%edx),%ebx 74 movl 8(%edx),%esp 75 movl 12(%edx),%ebp 76 movl 16(%edx),%esi 77 movl 20(%edx),%edi 78 testl %eax,%eax 79 jnz 1f 80 incl %eax 811: movl %ecx,0(%esp) 82 ret 83