1 | /* |
2 | * Copyright (c) 2015 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 | #ifndef _SECTION_KEYWORDS_H |
30 | #define _SECTION_KEYWORDS_H |
31 | |
32 | #define __PLACE_IN_SECTION(__segment__section) \ |
33 | __attribute__((used, section(__segment__section))) |
34 | |
35 | #define __SEGMENT_START_SYM(seg) asm("segment$start$" seg) |
36 | #define __SEGMENT_END_SYM(seg) asm("segment$end$" seg) |
37 | |
38 | #define __SECTION_START_SYM(seg, sect) asm("section$start$" seg "$" sect) |
39 | #define __SECTION_END_SYM(seg, sect) asm("section$end$" seg "$" sect) |
40 | |
41 | #if defined(__arm64__) || defined (__x86_64__) |
42 | |
43 | #define SECURITY_SEGMENT_NAME "__DATA" |
44 | #define SECURITY_SECTION_NAME "__const" |
45 | #define SECURITY_SEGMENT_SECTION_NAME "__DATA,__const" |
46 | |
47 | #define __security_const_early const |
48 | #define __security_const_late __attribute__((section(SECURITY_SEGMENT_SECTION_NAME))) |
49 | #define __security_read_write |
50 | |
51 | #if HIBERNATION |
52 | #define MARK_AS_HIBERNATE_TEXT __attribute__((section("__HIB, __text, regular, pure_instructions"))) |
53 | #define MARK_AS_HIBERNATE_DATA __attribute__((section("__HIB, __data"))) |
54 | #define MARK_AS_HIBERNATE_DATA_CONST_LATE __attribute__((section("__HIB, __const"))) |
55 | #endif /* HIBERNATION */ |
56 | #endif /* __arm64__ || __x86_64__ */ |
57 | |
58 | #ifndef __security_const_early |
59 | #define __security_const_early const |
60 | #endif |
61 | #ifndef __security_const_late |
62 | #define __security_const_late |
63 | #endif |
64 | #ifndef __security_read_write |
65 | #define __security_read_write |
66 | #endif |
67 | #ifndef MARK_AS_HIBERNATE_TEXT |
68 | #define MARK_AS_HIBERNATE_TEXT |
69 | #endif |
70 | #ifndef MARK_AS_HIBERNATE_DATA |
71 | #define MARK_AS_HIBERNATE_DATA |
72 | #endif |
73 | #ifndef MARK_AS_HIBERNATE_DATA_CONST_LATE |
74 | #define MARK_AS_HIBERNATE_DATA_CONST_LATE |
75 | #endif |
76 | |
77 | #define SECURITY_READ_ONLY_EARLY(_t) _t __security_const_early __attribute__((used)) |
78 | #define SECURITY_READ_ONLY_LATE(_t) _t __security_const_late __attribute__((used)) |
79 | #define SECURITY_READ_WRITE(_t) _t __security_read_write __attribute__((used)) |
80 | |
81 | #if CONFIG_SPTM |
82 | /* |
83 | * Place a function in a special segment, __TEXT_BOOT_EXEC. Code placed |
84 | * in this segment will be allowed by the SPTM to execute during the fixups |
85 | * phase; the rest of the code will be mapped as RW, so that it can be overwritten. |
86 | * Code that is required to execute in order to apply fixups MUST be contained |
87 | * in this special segment. |
88 | */ |
89 | #define MARK_AS_FIXUP_TEXT __attribute__((used, section("__TEXT_BOOT_EXEC,__bootcode,regular,pure_instructions"))) |
90 | #else |
91 | #define MARK_AS_FIXUP_TEXT |
92 | #endif |
93 | |
94 | #endif /* _SECTION_KEYWORDS_H_ */ |
95 | |