1 | /* |
2 | * Copyright (c) 2007-2021 Apple 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 | * Copyright (c) 1992 NeXT Computer, Inc. |
30 | * |
31 | * Machine dependent kernel calls. |
32 | * |
33 | * HISTORY |
34 | * |
35 | * 17 June 1992 ? at NeXT |
36 | * Created. |
37 | */ |
38 | |
39 | #include <kern/thread.h> |
40 | #include <mach/mach_types.h> |
41 | #include <arm/machdep_call.h> |
42 | #if __arm64__ |
43 | #include <arm64/machine_machdep.h> |
44 | #endif |
45 | |
46 | extern kern_return_t kern_invalid(void); |
47 | |
48 | uintptr_t |
49 | get_tpidrro(void) |
50 | { |
51 | uintptr_t uthread; |
52 | __asm__ volatile ("mrs %0, TPIDRRO_EL0" : "=r" (uthread)); |
53 | return uthread; |
54 | } |
55 | |
56 | void |
57 | set_tpidrro(uintptr_t uthread) |
58 | { |
59 | __asm__ volatile ("msr TPIDRRO_EL0, %0" : : "r" (uthread)); |
60 | } |
61 | |
62 | kern_return_t |
63 | thread_set_cthread_self(vm_address_t self) |
64 | { |
65 | return machine_thread_set_tsd_base(thread: current_thread(), tsd_base: self); |
66 | } |
67 | |
68 | vm_address_t |
69 | thread_get_cthread_self(void) |
70 | { |
71 | uintptr_t self; |
72 | |
73 | self = get_tpidrro(); |
74 | assert( self == current_thread()->machine.cthread_self); |
75 | return self; |
76 | } |
77 | |