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

   1 /* Definitions for POSIX memory map interface.  Linux/MIPS version.
   2    Copyright (C) 1997, 2000, 2003, 2004, 2005, 2006
   3    Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #ifndef _SYS_MMAN_H
  22 # error "Never use <bits/mman.h> directly; include <sys/mman.h> instead."
  23 #endif
  24
  25 /* The following definitions basically come from the kernel headers.
  26    But the kernel header is not namespace clean.  */
  27
  28
  29 /* Protections are chosen from these bits, OR'd together.  The
  30    implementation does not necessarily support PROT_EXEC or PROT_WRITE
  31    without PROT_READ.  The only guarantees are that no writing will be
  32    allowed without PROT_WRITE and no access will be allowed for PROT_NONE. */
  33
  34 #define PROT_READ       0x1             /* Page can be read.  */
  35 #define PROT_WRITE      0x2             /* Page can be written.  */
  36 #define PROT_EXEC       0x4             /* Page can be executed.  */
  37 #define PROT_NONE       0x0             /* Page can not be accessed.  */
  38 #define PROT_GROWSDOWN  0x01000000      /* Extend change to start of
  39                                            growsdown vma (mprotect only).  */
  40 #define PROT_GROWSUP    0x02000000      /* Extend change to start of
  41                                            growsup vma (mprotect only).  */
  42
  43 /* Sharing types (must choose one and only one of these).  */
  44 #define MAP_SHARED      0x01            /* Share changes.  */
  45 #define MAP_PRIVATE     0x02            /* Changes are private.  */
  46 #ifdef __USE_MISC
  47 # define MAP_TYPE       0x0f            /* Mask for type of mapping.  */
  48 #endif
  49
  50 /* Other flags.  */
  51 #define MAP_FIXED       0x10            /* Interpret addr exactly.  */
  52 #ifdef __USE_MISC
  53 # define MAP_FILE       0x00
  54 # define MAP_ANONYMOUS  0x0800          /* Don't use a file.  */
  55 # define MAP_ANON       MAP_ANONYMOUS
  56 # define MAP_RENAME     MAP_ANONYMOUS
  57 #endif
  58
  59 /* These are Linux-specific.  */
  60 #ifdef __USE_MISC
  61 # define MAP_NORESERVE  0x0400          /* don't check for reservations */
  62 # define MAP_ANONYMOUS  0x0800          /* don't use a file */
  63 # define MAP_GROWSDOWN  0x1000          /* stack-like segment */
  64 # define MAP_DENYWRITE  0x2000          /* ETXTBSY */
  65 # define MAP_EXECUTABLE 0x4000          /* mark it as an executable */
  66 # define MAP_LOCKED     0x8000          /* pages are locked */
  67 # define MAP_POPULATE   0x10000         /* populate (prefault) pagetables */
  68 # define MAP_NONBLOCK   0x20000         /* do not block on IO */
  69 #endif
  70
  71 /* Flags to `msync'.  */
  72 #define MS_ASYNC        1               /* Sync memory asynchronously.  */
  73 #define MS_INVALIDATE   2               /* Invalidate the caches.  */
  74 #define MS_SYNC         4               /* Synchronous memory sync.  */
  75
  76 /* Flags for `mlockall'.  */
  77 #define MCL_CURRENT     1               /* Lock all currently mapped pages.  */
  78 #define MCL_FUTURE      2               /* Lock all additions to address
  79                                            space.  */
  80
  81 /* Advice to `madvise'.  */
  82 #ifdef __USE_BSD
  83 #define MADV_NORMAL     0               /* default page-in behavior */
  84 #define MADV_RANDOM     1               /* page-in minimum required */
  85 #define MADV_SEQUENTIAL 2               /* read-ahead aggressively */
  86 #define MADV_WILLNEED   3               /* pre-fault pages */
  87 #define MADV_DONTNEED   4               /* discard these pages */
  88 #define MADV_REMOVE     5               /* remove these pages & resources */
  89 #endif
  90
  91 /* Flags for `mremap'.  */
  92 #ifdef __USE_GNU
  93 # define MREMAP_MAYMOVE 1
  94 # define MREMAP_FIXED   2
  95 #endif