libc/include/llvm-libc-macros/linux/sys-mman-macros.h

   1 //===-- Definition of macros from sys/mman.h ------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #ifndef __LLVM_LIBC_MACROS_LINUX_SYS_MMAN_MACROS_H
  10 #define __LLVM_LIBC_MACROS_LINUX_SYS_MMAN_MACROS_H
  11
  12 // Memory protection flags. (mmap, munmap, mprotect)
  13 #define PROT_NONE 0x0
  14 #define PROT_READ 0x1
  15 #define PROT_WRITE 0x2
  16 #define PROT_EXEC 0x4
  17 // These protection flags are only valid for mprotect.
  18 #define PROT_GROWSUP 0x1000000
  19 #define PROT_GROWSDOWN 0x2000000
  20
  21 // Memory mapping flags. (mmap, munmap)
  22 #define MAP_FAILED ((void *)-1)
  23 // These are the sharing types, and exactly one of these must be set.
  24 #define MAP_FILE 0x0 // Compatibility flag. Ignored.
  25 #define MAP_SHARED 0x1
  26 #define MAP_PRIVATE 0x2
  27 #define MAP_SHARED_VALIDATE 0x3
  28 // 0x4-0xf are unused.
  29 // These are the other flags, and zero or more of these can be set.
  30 #define MAP_FIXED 0x10
  31 #define MAP_ANONYMOUS 0x20
  32 #define MAP_ANON MAP_ANONYMOUS
  33 #define MAP_32BIT 0x40
  34 // 0x80 is unused.
  35 #define MAP_GROWSDOWN 0x100
  36 #define MAP_DENYWRITE 0x800
  37 #define MAP_EXECUTABLE 0x1000 // Compatibility flag. Ignored.
  38 #define MAP_LOCKED 0x2000
  39 #define MAP_NORESERVE 0x4000
  40 #define MAP_POPULATE 0x8000
  41 #define MAP_NONBLOCK 0x10000
  42 #define MAP_STACK 0x20000
  43 #define MAP_HUGETLB 0x40000
  44 #define MAP_SYNC 0x80000
  45 #define MAP_FIXED_NOREPLACE 0x100000
  46 // HUGETLB support macros. If ma_HUGHTLB is set, the bits under MAP_HUGE_MASK
  47 // represent the base-2 logarithm of the desired page size, and MAP_HUGE_2MB/1GB
  48 // are common sizes.
  49 #define MAP_HUGE_SHIFT 26
  50 #define MAP_HUGE_MASK 0x3f
  51 #define MAP_HUGE_2MB (21 << MAP_HUGE_SHIFT)
  52 #define MAP_HUGE_1GB (30 << MAP_HUGE_SHIFT)
  53
  54 // Memory sync flags. (msync)
  55 #define MS_ASYNC 1
  56 #define MS_INVALIDATE 2
  57 #define MS_SYNC 4
  58
  59 // Memory advice flags. (madvise)
  60 #define MADV_NORMAL 0
  61 #define MADV_RANDOM 1
  62 #define MADV_SEQUENTIAL 2
  63 #define MADV_WILLNEED 3
  64 #define MADV_DONTNEED 4
  65 #define MADV_FREE 8
  66 #define MADV_REMOVE 9
  67 #define MADV_DONTFORK 10
  68 #define MADV_DOFORK 11
  69 #define MADV_MERGEABLE 12
  70 #define MADV_UNMERGEABLE 13
  71 #define MADV_HUGEPAGE 14
  72 #define MADV_NOHUGEPAGE 15
  73 #define MADV_DONTDUMP 16
  74 #define MADV_DODUMP 17
  75 #define MADV_WIPEONFORK 18
  76 #define MADV_KEEPONFORK 19
  77 #define MADV_COLD 20
  78 #define MADV_PAGEOUT 21
  79 #define MADV_HWPOISON 100
  80
  81 // Posix memory advise flags. (posix_madvise)
  82 #define POSIX_MADV_NORMAL MADV_NORMAL
  83 #define POSIX_MADV_SEQUENTIAL MADV_SEQUENTIAL
  84 #define POSIX_MADV_RANDOM MADV_RANDOM
  85 #define POSIX_MADV_WILLNEED MADV_WILLNEED
  86 #define POSIX_MADV_DONTNEED MADV_DONTNEED
  87
  88 #endif // __LLVM_LIBC_MACROS_LINUX_SYS_MMAN_MACROS_H