1 /* Definitions for POSIX memory map interface. Linux/m68k version.
2 Copyright (C) 1997, 2000, 2003, 2005 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
21 # error "Never use <bits/mman.h> directly; include <sys/mman.h> instead."
24 /* The following definitions basically come from the kernel headers.
25 But the kernel header is not namespace clean. */
28 /* Protections are chosen from these bits, OR'd together. The
29 implementation does not necessarily support PROT_EXEC or PROT_WRITE
30 without PROT_READ. The only guarantees are that no writing will be
31 allowed without PROT_WRITE and no access will be allowed for PROT_NONE. */
33 #define PROT_READ 0x1 /* Page can be read. */
34 #define PROT_WRITE 0x2 /* Page can be written. */
35 #define PROT_EXEC 0x4 /* Page can be executed. */
36 #define PROT_NONE 0x0 /* Page can not be accessed. */
37 #define PROT_GROWSDOWN 0x01000000 /* Extend change to start of
38 growsdown vma (mprotect only). */
39 #define PROT_GROWSUP 0x02000000 /* Extend change to start of
40 growsup vma (mprotect only). */
42 /* Sharing types (must choose one and only one of these). */
43 #define MAP_SHARED 0x01 /* Share changes. */
44 #define MAP_PRIVATE 0x02 /* Changes are private. */
46 # define MAP_TYPE 0x0f /* Mask for type of mapping. */
50 #define MAP_FIXED 0x10 /* Interpret addr exactly. */
53 # define MAP_ANONYMOUS 0x20 /* Don't use a file. */
54 # define MAP_ANON MAP_ANONYMOUS
57 /* These are Linux-specific. */
59 # define MAP_GROWSDOWN 0x00100 /* Stack-like segment. */
60 # define MAP_DENYWRITE 0x00800 /* ETXTBSY */
61 # define MAP_EXECUTABLE 0x01000 /* Mark it as an executable. */
62 # define MAP_LOCKED 0x02000 /* Lock the mapping. */
63 # define MAP_NORESERVE 0x04000 /* Don't check for reservations. */
64 # define MAP_POPULATE 0x08000 /* Populate (prefault) pagetables. */
65 # define MAP_NONBLOCK 0x10000 /* Do not block on IO. */
68 /* Flags to `msync'. */
69 #define MS_ASYNC 1 /* Sync memory asynchronously. */
70 #define MS_SYNC 4 /* Synchronous memory sync. */
71 #define MS_INVALIDATE 2 /* Invalidate the caches. */
73 /* Flags for `mlockall'. */
74 #define MCL_CURRENT 1 /* Lock all currently mapped pages. */
75 #define MCL_FUTURE 2 /* Lock all additions to address
78 /* Flags for `mremap'. */
80 # define MREMAP_MAYMOVE 1
81 # define MREMAP_FIXED 2
84 /* Advice to `madvise'. */
86 # define MADV_NORMAL 0 /* No further special treatment. */
87 # define MADV_RANDOM 1 /* Expect random page references. */
88 # define MADV_SEQUENTIAL 2 /* Expect sequential page references. */
89 # define MADV_WILLNEED 3 /* Will need these pages. */
90 # define MADV_DONTNEED 4 /* Don't need these pages. */
91 # define MADV_DONTFORK 10 /* Do not inherit across fork. */
92 # define MADV_DOFORK 11 /* Do inherit across fork. */
95 /* The POSIX people had to invent similar names for the same things. */
97 # define POSIX_MADV_NORMAL 0 /* No further special treatment. */
98 # define POSIX_MADV_RANDOM 1 /* Expect random page references. */
99 # define POSIX_MADV_SEQUENTIAL 2 /* Expect sequential page references. */
100 # define POSIX_MADV_WILLNEED 3 /* Will need these pages. */
101 # define POSIX_MADV_DONTNEED 4 /* Don't need these pages. */