| | 1 | /* |
| | 2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_LICENSE_HEADER_START@ |
| | 5 | * |
| | 6 | * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved. |
| | 7 | * |
| | 8 | * This file contains Original Code and/or Modifications of Original Code |
| | 9 | * as defined in and that are subject to the Apple Public Source License |
| | 10 | * Version 2.0 (the 'License'). You may not use this file except in |
| | 11 | * compliance with the License. Please obtain a copy of the License at |
| | 12 | * http://www.opensource.apple.com/apsl/ and read it before using this |
| | 13 | * file. |
| | 14 | * |
| | 15 | * The Original Code and all software distributed under the License are |
| | 16 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| | 17 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 18 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 19 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| | 20 | * Please see the License for the specific language governing rights and |
| | 21 | * limitations under the License. |
| | 22 | * |
| | 23 | * @APPLE_LICENSE_HEADER_END@ |
| | 24 | */ |
| | 25 | /* |
| | 26 | * @OSF_COPYRIGHT@ |
| | 27 | */ |
| | 28 | /* |
| | 29 | * Mach Operating System |
| | 30 | * Copyright (c) 1991,1990,1989 Carnegie Mellon University |
| | 31 | * All Rights Reserved. |
| | 32 | * |
| | 33 | * Permission to use, copy, modify and distribute this software and its |
| | 34 | * documentation is hereby granted, provided that both the copyright |
| | 35 | * notice and this permission notice appear in all copies of the |
| | 36 | * software, derivative works or modified versions, and any portions |
| | 37 | * thereof, and that both notices appear in supporting documentation. |
| | 38 | * |
| | 39 | * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" |
| | 40 | * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR |
| | 41 | * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. |
| | 42 | * |
| | 43 | * Carnegie Mellon requests users of this software to return to |
| | 44 | * |
| | 45 | * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU |
| | 46 | * School of Computer Science |
| | 47 | * Carnegie Mellon University |
| | 48 | * Pittsburgh PA 15213-3890 |
| | 49 | * |
| | 50 | * any improvements or extensions that they make and grant Carnegie Mellon |
| | 51 | * the rights to redistribute these changes. |
| | 52 | */ |
| | 53 | /* |
| | 54 | */ |
| | 55 | |
| | 56 | /* |
| | 57 | * C library -- _setjmp, _longjmp |
| | 58 | * |
| | 59 | * _longjmp(a,v) |
| | 60 | * will generate a "return(v)" from |
| | 61 | * the last call to |
| | 62 | * _setjmp(a) |
| | 63 | * by restoring registers from the stack, |
| | 64 | * The previous signal state is NOT restored. |
| | 65 | * |
| | 66 | */ |
| | 67 | |
| | 68 | #include <i386/asm.h> |
| | 69 | |
| | 70 | ENTRY(_setjmp) |
| | 71 | movl 4(%esp),%ecx # fetch buffer |
| | 72 | movl %ebx,0(%ecx) |
| | 73 | movl %esi,4(%ecx) |
| | 74 | movl %edi,8(%ecx) |
| | 75 | movl %ebp,12(%ecx) # save frame pointer of caller |
| | 76 | popl %edx |
| | 77 | movl %esp,16(%ecx) # save stack pointer of caller |
| | 78 | movl %edx,20(%ecx) # save pc of caller |
| | 79 | xorl %eax,%eax |
| | 80 | jmp *%edx |
| | 81 | |
| | 82 | ENTRY(_longjmp) |
| | 83 | movl 8(%esp),%eax # return(v) |
| | 84 | movl 4(%esp),%ecx # fetch buffer |
| | 85 | movl 0(%ecx),%ebx |
| | 86 | movl 4(%ecx),%esi |
| | 87 | movl 8(%ecx),%edi |
| | 88 | movl 12(%ecx),%ebp |
| | 89 | movl 16(%ecx),%esp |
| | 90 | orl %eax,%eax |
| | 91 | jnz 0f |
| | 92 | incl %eax |
| | 93 | 0: jmp *20(%ecx) # done, return.... |
projects / apple / xnu.git / blame_incremental