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 | #include <arm64/asm.h> |
29 | #include <arm64/proc_reg.h> |
30 | #include "assym.s" |
31 | |
32 | #if defined(__arm64__) |
33 | /* We're fine, use adrp, add */ |
34 | #else |
35 | #error Unknown architecture. |
36 | #endif |
37 | |
38 | .section __BOOTDATA, __data // Aligned data |
39 | |
40 | .align 14 |
41 | |
42 | .globl EXT(intstack_low_guard) |
43 | LEXT(intstack_low_guard) |
44 | .space (PAGE_MAX_SIZE_NUM) |
45 | |
46 | /* IRQ stack */ |
47 | .globl EXT(intstack) // Boot processor IRQ stack |
48 | LEXT(intstack) |
49 | .space (INTSTACK_SIZE_NUM) |
50 | .globl EXT(intstack_top) |
51 | LEXT(intstack_top) |
52 | |
53 | .globl EXT(intstack_high_guard) |
54 | LEXT(intstack_high_guard) |
55 | .space (PAGE_MAX_SIZE_NUM) |
56 | |
57 | /* Low guard for fiq/exception stack is shared w/ interrupt stack high guard */ |
58 | |
59 | #ifdef __arm64__ |
60 | .global EXT(excepstack) |
61 | LEXT(excepstack) |
62 | .space (EXCEPSTACK_SIZE_NUM) |
63 | .globl EXT(excepstack_top) |
64 | LEXT(excepstack_top) |
65 | |
66 | .globl EXT(excepstack_high_guard) |
67 | LEXT(excepstack_high_guard) |
68 | .space (PAGE_MAX_SIZE_NUM) |
69 | |
70 | #endif |
71 | |
72 | // Must align to 16K here, due to <rdar://problem/33268668> |
73 | .global EXT(kd_early_buffer) |
74 | .align 14 |
75 | LEXT(kd_early_buffer) // space for kdebug's early event buffer |
76 | .space 16*1024,0 |
77 | |
78 | .section __DATA, __data // Aligned data |
79 | .align 3 // unsigned long long aligned Section |
80 | .globl EXT(RTClockData) |
81 | LEXT(RTClockData) // Real Time clock area |
82 | .space RTCLOCKDataSize_NUM,0 // (filled with 0s) |
83 | |
84 | #if TRASH_VFP_ON_SAVE |
85 | .align 4 |
86 | .globl EXT(vfptrash_data) |
87 | LEXT(vfptrash_data) |
88 | .fill 64, 4, 0xca55e77e |
89 | #endif |
90 | |
91 | #if __arm64__ |
92 | |
93 | #if defined(KERNEL_INTEGRITY_KTRR) || defined(KERNEL_INTEGRITY_CTRR) |
94 | #if CONFIG_SPTM |
95 | .section __DATA_SPTM, __const |
96 | .align 14 |
97 | /* reserve a page for xnu-CTRR covered SPTM data */ |
98 | .space 16*1024,0 |
99 | #else |
100 | .section __DATA, __const |
101 | .align 14 |
102 | #endif /* CONFIG_SPTM */ |
103 | /* reserve space for read only page tables */ |
104 | LEXT(ropagetable_begin) |
105 | #if XNU_TARGET_OS_OSX |
106 | // A big auxKC might need more page tables, especially because |
107 | // it's not block mapped. |
108 | // Note that we don't distuinguish between KASAN or not: With |
109 | // a KASAN kernel, the effective auxKC limit is smaller. |
110 | .space 18*16*1024,0 |
111 | #elif KASAN |
112 | .space 16*16*1024,0 |
113 | #else |
114 | .space 14*16*1024,0 |
115 | #endif |
116 | #else |
117 | LEXT(ropagetable_begin) |
118 | #endif /* defined(KERNEL_INTEGRITY_KTRR) || defined(KERNEL_INTEGRITY_CTRR) */ |
119 | |
120 | LEXT(ropagetable_end) |
121 | |
122 | .globl EXT(ropagetable_begin) |
123 | .globl EXT(ropagetable_end) |
124 | #endif /* __arm64__ */ |
125 | |
126 | /* vim: set ts=4: */ |
127 | |