1  /* Definitions for POSIX memory map interface.  Linux/Alpha version.
       2     Copyright (C) 1997-2023 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