libkern/libkern/section_keywords.h

   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
  42 #ifndef __security_const_early
  43 #define __security_const_early const
  44 #endif
  45 #ifndef __security_const_late
  46 #define __security_const_late
  47 #endif
  48 #ifndef __security_read_write
  49 #define __security_read_write
  50 #endif
  51 #ifndef MARK_AS_HIBERNATE_TEXT
  52 #define MARK_AS_HIBERNATE_TEXT
  53 #endif
  54 #ifndef MARK_AS_HIBERNATE_DATA
  55 #define MARK_AS_HIBERNATE_DATA
  56 #endif
  57
  58 #define SECURITY_READ_ONLY_SPECIAL_SECTION(_t, __segment__section) \
  59         __security_const_early _t __PLACE_IN_SECTION(__segment__section)
  60
  61 #define SECURITY_READ_ONLY_EARLY(_t) _t __security_const_early __attribute__((used))
  62 #define SECURITY_READ_ONLY_LATE(_t)  _t __security_const_late  __attribute__((used))
  63 #define SECURITY_READ_WRITE(_t)      _t __security_read_write  __attribute__((used))
  64
  65 #endif /* _SECTION_KEYWORDS_H_ */