projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 4cd50e5e | 1 | /* Definitions for POSIX memory map interface. Linux/MIPS version. |
| 91a59c6a | 2 | Copyright (C) 1997, 2000, 2003, 2004, 2005, 2006, 2009, 2011 |
| 123d009b | 3 | Free Software Foundation, Inc. |
| 52b963b0 UD |
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 | |
| 3214b89b AJ |
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. | |
| 52b963b0 UD |
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 | |
| 3214b89b | 14 | Lesser General Public License for more details. |
| 52b963b0 | 15 | |
| 3214b89b | 16 | You should have received a copy of the GNU Lesser General Public |
| ab84e3ff PE |
17 | License along with the GNU C Library. If not, see |
| 18 | <http://www.gnu.org/licenses/>. */ | |
| 52b963b0 UD |
19 | |
| 20 | #ifndef _SYS_MMAN_H | |
| 90571408 | 21 | # error "Never use <bits/mman.h> directly; include <sys/mman.h> instead." |
| 52b963b0 UD |
22 | #endif |
| 23 | ||
| 24 | /* The following definitions basically come from the kernel headers. | |
| 25 | But the kernel header is not namespace clean. */ | |
| 26 | ||
| 27 | ||
| 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. */ | |
| 32 | ||
| 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. */ | |
| 2b35938b RM |
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). */ | |
| 52b963b0 UD |
41 | |
| 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. */ | |
| 45 | #ifdef __USE_MISC | |
| 46 | # define MAP_TYPE 0x0f /* Mask for type of mapping. */ | |
| 47 | #endif | |
| 48 | ||
| 49 | /* Other flags. */ | |
| 50 | #define MAP_FIXED 0x10 /* Interpret addr exactly. */ | |
| 51 | #ifdef __USE_MISC | |
| 075f1edd | 52 | # define MAP_FILE 0 |
| 19918d3d | 53 | # define MAP_ANONYMOUS 0x0800 /* Don't use a file. */ |
| 52b963b0 UD |
54 | # define MAP_ANON MAP_ANONYMOUS |
| 55 | # define MAP_RENAME MAP_ANONYMOUS | |
| 56 | #endif | |
| 57 | ||
| 58 | /* These are Linux-specific. */ | |
| 59 | #ifdef __USE_MISC | |
| e8d795b0 UD |
60 | # define MAP_NORESERVE 0x0400 /* don't check for reservations */ |
| 61 | # define MAP_ANONYMOUS 0x0800 /* don't use a file */ | |
| 62 | # define MAP_GROWSDOWN 0x1000 /* stack-like segment */ | |
| 19918d3d | 63 | # define MAP_DENYWRITE 0x2000 /* ETXTBSY */ |
| e8d795b0 UD |
64 | # define MAP_EXECUTABLE 0x4000 /* mark it as an executable */ |
| 65 | # define MAP_LOCKED 0x8000 /* pages are locked */ | |
| 3347c3ad AJ |
66 | # define MAP_POPULATE 0x10000 /* populate (prefault) pagetables */ |
| 67 | # define MAP_NONBLOCK 0x20000 /* do not block on IO */ | |
| 52b963b0 UD |
68 | #endif |
| 69 | ||
| 70 | /* Flags to `msync'. */ | |
| 71 | #define MS_ASYNC 1 /* Sync memory asynchronously. */ | |
| 22e908b0 | 72 | #define MS_SYNC 4 /* Synchronous memory sync. */ |
| 075f1edd | 73 | #define MS_INVALIDATE 2 /* Invalidate the caches. */ |
| 52b963b0 UD |
74 | |
| 75 | /* Flags for `mlockall'. */ | |
| 19918d3d AJ |
76 | #define MCL_CURRENT 1 /* Lock all currently mapped pages. */ |
| 77 | #define MCL_FUTURE 2 /* Lock all additions to address | |
| 52b963b0 UD |
78 | space. */ |
| 79 | ||
| 80 | /* Flags for `mremap'. */ | |
| 81 | #ifdef __USE_GNU | |
| 82 | # define MREMAP_MAYMOVE 1 | |
| d3fcfbb0 | 83 | # define MREMAP_FIXED 2 |
| 52b963b0 | 84 | #endif |
| 075f1edd DJ |
85 | |
| 86 | /* Advice to `madvise'. */ | |
| 87 | #ifdef __USE_BSD | |
| 24bcda03 JM |
88 | # define MADV_NORMAL 0 /* No further special treatment. */ |
| 89 | # define MADV_RANDOM 1 /* Expect random page references. */ | |
| 90 | # define MADV_SEQUENTIAL 2 /* Expect sequential page references. */ | |
| 91 | # define MADV_WILLNEED 3 /* Will need these pages. */ | |
| 92 | # define MADV_DONTNEED 4 /* Don't need these pages. */ | |
| 93 | # define MADV_REMOVE 9 /* Remove these pages and resources. */ | |
| 94 | # define MADV_DONTFORK 10 /* Do not inherit across fork. */ | |
| 95 | # define MADV_DOFORK 11 /* Do inherit across fork. */ | |
| 96 | # define MADV_MERGEABLE 12 /* KSM may merge identical pages. */ | |
| 97 | # define MADV_UNMERGEABLE 13 /* KSM may not merge identical pages. */ | |
| 91a59c6a JM |
98 | # define MADV_HUGEPAGE 14 /* Worth backing with hugepages. */ |
| 99 | # define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages. */ | |
| 24bcda03 | 100 | # define MADV_HWPOISON 100 /* Poison a page for testing. */ |
| 075f1edd DJ |
101 | #endif |
| 102 | ||
| 103 | /* The POSIX people had to invent similar names for the same things. */ | |
| 104 | #ifdef __USE_XOPEN2K | |
| 105 | # define POSIX_MADV_NORMAL 0 /* No further special treatment. */ | |
| 106 | # define POSIX_MADV_RANDOM 1 /* Expect random page references. */ | |
| 107 | # define POSIX_MADV_SEQUENTIAL 2 /* Expect sequential page references. */ | |
| 108 | # define POSIX_MADV_WILLNEED 3 /* Will need these pages. */ | |
| 109 | # define POSIX_MADV_DONTNEED 4 /* Don't need these pages. */ | |
| 110 | #endif |