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