1/* 2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28/* 29 * @OSF_COPYRIGHT@ 30 */ 31/* 32 * Mach Operating System 33 * Copyright (c) 1991,1990,1989 Carnegie Mellon University 34 * All Rights Reserved. 35 * 36 * Permission to use, copy, modify and distribute this software and its 37 * documentation is hereby granted, provided that both the copyright 38 * notice and this permission notice appear in all copies of the 39 * software, derivative works or modified versions, and any portions 40 * thereof, and that both notices appear in supporting documentation. 41 * 42 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 43 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 44 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 45 * 46 * Carnegie Mellon requests users of this software to return to 47 * 48 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 49 * School of Computer Science 50 * Carnegie Mellon University 51 * Pittsburgh PA 15213-3890 52 * 53 * any improvements or extensions that they make and grant Carnegie Mellon 54 * the rights to redistribute these changes. 55 */ 56/* 57 */ 58 59/* 60 * C library -- _setjmp, _longjmp 61 * 62 * _longjmp(a,v) 63 * will generate a "return(v)" from 64 * the last call to 65 * _setjmp(a) 66 * by restoring registers from the stack, 67 * The previous signal state is NOT restored. 68 * 69 */ 70 71#include <mach/machine/asm.h> 72 73.private_extern _setjmp 74.private_extern _longjmp 75 76ENTRY(setjmp) 77 movl 4(%esp),%ecx # fetch buffer 78 movl %ebx,0(%ecx) 79 movl %esi,4(%ecx) 80 movl %edi,8(%ecx) 81 movl %ebp,12(%ecx) # save frame pointer of caller 82 popl %edx 83 movl %esp,16(%ecx) # save stack pointer of caller 84 movl %edx,20(%ecx) # save pc of caller 85 xorl %eax,%eax 86 jmp *%edx 87 88 89ENTRY(longjmp) 90 movl 8(%esp),%eax # return(v) 91 movl 4(%esp),%ecx # fetch buffer 92 movl 0(%ecx),%ebx 93 movl 4(%ecx),%esi 94 movl 8(%ecx),%edi 95 movl 12(%ecx),%ebp 96 movl 16(%ecx),%esp 97 orl %eax,%eax 98 jnz 0f 99 incl %eax 1000: jmp *20(%ecx) # done, return.... 101