1 /* 2 * Copyright (c) 2022 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_LICENSE_HEADER_START@ 5 * 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. 11 * 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 14 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 15 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 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. 19 * 20 * @APPLE_LICENSE_HEADER_END@ 21 */ 22 23 #ifndef _KERN_LOCKDOWN_MODE_H_ 24 #define _KERN_LOCKDOWN_MODE_H_ 25 26 #include <sys/cdefs.h> 27 __BEGIN_DECLS 28 29 #if KERNEL_PRIVATE 30 /* XNU and Kernel extensions */ 31 32 #if XNU_KERNEL_PRIVATE 33 34 // Whether Lockdown Mode is enabled via the "ldm" nvram variable 35 extern int lockdown_mode_state; 36 37 /** 38 * Initalizes Lockdown Mode 39 */ 40 void lockdown_mode_init(void); 41 42 #endif /* XNU_KERNEL_PRIVATE */ 43 44 /** 45 * Returns the Lockdown Mode enablement state 46 */ 47 int get_lockdown_mode_state(void); 48 49 /** 50 * Enable Lockdown Mode by setting the nvram variable 51 */ 52 void enable_lockdown_mode(void); 53 54 /** 55 * Disable Lockdown Mode by setting the nvram variable 56 */ 57 void disable_lockdown_mode(void); 58 59 #endif /* KERNEL_PRIVATE */ 60 __END_DECLS 61 62 #endif /* _KERN_LOCKDOWN_MODE_H_ */ 63