sysdeps/unix/sysv/linux/bits/mman-map-flags-generic.h

   1 /* Definitions for POSIX memory map interface.  Linux/generic version.
   2    Copyright (C) 1997-2022 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-map-flags-generic.h> directly; include <sys/mman.h> instead."
  21 #endif
  22
  23 /* These definitions are appropriate for architectures that, in the
  24    Linux kernel, either have no uapi/asm/mman.h, or have one that
  25    includes asm-generic/mman.h without any changes to the values of
  26    the MAP_* flags defined in that header.  */
  27
  28 #ifdef __USE_MISC
  29 # define MAP_GROWSDOWN  0x00100         /* Stack-like segment.  */
  30 # define MAP_DENYWRITE  0x00800         /* ETXTBSY.  */
  31 # define MAP_EXECUTABLE 0x01000         /* Mark it as an executable.  */
  32 # define MAP_LOCKED     0x02000         /* Lock the mapping.  */
  33 # define MAP_NORESERVE  0x04000         /* Don't check for reservations.  */
  34 # define MAP_POPULATE   0x08000         /* Populate (prefault) pagetables.  */
  35 # define MAP_NONBLOCK   0x10000         /* Do not block on IO.  */
  36 # define MAP_STACK      0x20000         /* Allocation is for a stack.  */
  37 # define MAP_HUGETLB    0x40000         /* Create huge page mapping.  */
  38 # define MAP_SYNC       0x80000         /* Perform synchronous page
  39                                            faults for the mapping.  */
  40 # define MAP_FIXED_NOREPLACE 0x100000   /* MAP_FIXED but do not unmap
  41                                            underlying mapping.  */
  42 #endif