projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| 1c79356b A |
1 | /* |
| 2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. | |
| 3 | * | |
| 4 | * @APPLE_LICENSE_HEADER_START@ | |
| 5 | * | |
| 37839358 A |
6 | * The contents of this file constitute Original Code as defined in and |
| 7 | * are subject to the Apple Public Source License Version 1.1 (the | |
| 8 | * "License"). You may not use this file except in compliance with the | |
| 9 | * License. Please obtain a copy of the License at | |
| 10 | * http://www.apple.com/publicsource and read it before using this file. | |
| e5568f75 | 11 | * |
| 37839358 A |
12 | * This Original Code and all software distributed under the License are |
| 13 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 1c79356b A |
14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 37839358 A |
16 | * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the |
| 17 | * License for the specific language governing rights and limitations | |
| 18 | * under the License. | |
| 1c79356b A |
19 | * |
| 20 | * @APPLE_LICENSE_HEADER_END@ | |
| 21 | */ | |
| 22 | /* | |
| 23 | * @OSF_COPYRIGHT@ | |
| 24 | */ | |
| 25 | /* | |
| 26 | * Mach Operating System | |
| 27 | * Copyright (c) 1991,1990,1989 Carnegie Mellon University | |
| 28 | * All Rights Reserved. | |
| 29 | * | |
| 30 | * Permission to use, copy, modify and distribute this software and its | |
| 31 | * documentation is hereby granted, provided that both the copyright | |
| 32 | * notice and this permission notice appear in all copies of the | |
| 33 | * software, derivative works or modified versions, and any portions | |
| 34 | * thereof, and that both notices appear in supporting documentation. | |
| 35 | * | |
| 36 | * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" | |
| 37 | * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR | |
| 38 | * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. | |
| 39 | * | |
| 40 | * Carnegie Mellon requests users of this software to return to | |
| 41 | * | |
| 42 | * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU | |
| 43 | * School of Computer Science | |
| 44 | * Carnegie Mellon University | |
| 45 | * Pittsburgh PA 15213-3890 | |
| 46 | * | |
| 47 | * any improvements or extensions that they make and grant Carnegie Mellon | |
| 48 | * the rights to redistribute these changes. | |
| 49 | */ | |
| 50 | /* | |
| 51 | */ | |
| 52 | ||
| 53 | /* | |
| 54 | * C library -- _setjmp, _longjmp | |
| 55 | * | |
| 56 | * _longjmp(a,v) | |
| 57 | * will generate a "return(v)" from | |
| 58 | * the last call to | |
| 59 | * _setjmp(a) | |
| 60 | * by restoring registers from the stack, | |
| 61 | * The previous signal state is NOT restored. | |
| 62 | * | |
| 63 | */ | |
| 64 | ||
| 65 | #include <mach/machine/asm.h> | |
| 66 | ||
| 67 | .private_extern _setjmp | |
| 68 | .private_extern _longjmp | |
| 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 | ||
| 83 | ENTRY(longjmp) | |
| 84 | movl 8(%esp),%eax # return(v) | |
| 85 | movl 4(%esp),%ecx # fetch buffer | |
| 86 | movl 0(%ecx),%ebx | |
| 87 | movl 4(%ecx),%esi | |
| 88 | movl 8(%ecx),%edi | |
| 89 | movl 12(%ecx),%ebp | |
| 90 | movl 16(%ecx),%esp | |
| 91 | orl %eax,%eax | |
| 92 | jnz 0f | |
| 93 | incl %eax | |
| 94 | 0: jmp *20(%ecx) # done, return.... |