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