sysdeps/unix/sysv/linux/alpha/bits/mman.h

   1 /* Definitions for POSIX memory map interface.  Linux/Alpha version.
   2    Copyright (C) 1997-2024 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library.  If not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _SYS_MMAN_H
  20 # error "Never use <bits/mman.h> directly; include <sys/mman.h> instead."
  21 #endif
  22
  23 /* The following definitions basically come from the kernel headers.
  24    But the kernel header is not namespace clean.  */
  25
  26 #define __MAP_ANONYMOUS   0x10          /* Don't use a file.  */
  27
  28 /* These are Linux-specific.  */
  29 #define MAP_GROWSDOWN     0x01000       /* Stack-like segment.  */
  30 #define MAP_DENYWRITE     0x02000       /* ETXTBSY */
  31 #define MAP_EXECUTABLE    0x04000       /* Mark it as an executable.  */
  32 #define MAP_LOCKED        0x08000       /* Lock the mapping.  */
  33 #define MAP_NORESERVE     0x10000       /* Don't check for reservations.  */
  34 #define MAP_POPULATE      0x20000       /* Populate (prefault) pagetables.  */
  35 #define MAP_NONBLOCK      0x40000       /* Do not block on IO.  */
  36 #define MAP_STACK         0x80000       /* Allocation is for a stack.  */
  37 #define MAP_HUGETLB       0x100000      /* Create huge page mapping.  */
  38 #define MAP_FIXED_NOREPLACE 0x200000    /* MAP_FIXED but do not unmap
  39                                            underlying mapping.  */
  40
  41 /* Flags for `mlockall'.  */
  42 #define MCL_CURRENT       8192
  43 #define MCL_FUTURE        16384
  44 #define MCL_ONFAULT       32768
  45
  46 #include <bits/mman-linux.h>
  47
  48 /* Values that differ from standard <mman-linux.h>.  For the most part newer
  49    values are shared, but older values are skewed.  */
  50
  51 #undef  MAP_FIXED
  52 #define MAP_FIXED         0x100
  53
  54 #undef  MS_SYNC
  55 #define MS_SYNC           2
  56 #undef  MS_INVALIDATE
  57 #define MS_INVALIDATE     4
  58
  59 #ifdef __USE_MISC
  60 # undef  MADV_DONTNEED
  61 # define MADV_DONTNEED    6
  62 #endif
  63 #ifdef __USE_XOPEN2K
  64 # undef  POSIX_MADV_DONTNEED
  65 # define POSIX_MADV_DONTNEED    6
  66 #endif