projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| c9cf6dde AJ |
1 | /* Definitions for POSIX memory map interface. Linux/x86_64 version. |
| 2 | Copyright (C) 2001 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, write to the Free | |
| 17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
| 18 | 02111-1307 USA. */ | |
| 19 | ||
| 20 | #ifndef _SYS_MMAN_H | |
| 21 | # error "Never use <bits/mman.h> directly; include <sys/mman.h> instead." | |
| 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. */ | |
| 37 | ||
| 38 | /* Sharing types (must choose one and only one of these). */ | |
| 39 | #define MAP_SHARED 0x01 /* Share changes. */ | |
| 40 | #define MAP_PRIVATE 0x02 /* Changes are private. */ | |
| 41 | #ifdef __USE_MISC | |
| 42 | # define MAP_TYPE 0x0f /* Mask for type of mapping. */ | |
| 43 | #endif | |
| 44 | ||
| 45 | /* Other flags. */ | |
| 46 | #define MAP_FIXED 0x10 /* Interpret addr exactly. */ | |
| 47 | #ifdef __USE_MISC | |
| 48 | # define MAP_FILE 0 | |
| 49 | # define MAP_ANONYMOUS 0x20 /* Don't use a file. */ | |
| 50 | # define MAP_ANON MAP_ANONYMOUS | |
| 51 | # define MAP_32BIT 0x40 /* Only give out 32-bit addresses. */ | |
| 52 | #endif | |
| 53 | ||
| 54 | /* These are Linux-specific. */ | |
| 55 | #ifdef __USE_MISC | |
| 56 | # define MAP_GROWSDOWN 0x0100 /* Stack-like segment. */ | |
| 57 | # define MAP_DENYWRITE 0x0800 /* ETXTBSY */ | |
| 58 | # define MAP_EXECUTABLE 0x1000 /* Mark it as an executable. */ | |
| 59 | # define MAP_LOCKED 0x2000 /* Lock the mapping. */ | |
| 60 | # define MAP_NORESERVE 0x4000 /* Don't check for reservations. */ | |
| 61 | #endif | |
| 62 | ||
| 63 | /* Flags to `msync'. */ | |
| 64 | #define MS_ASYNC 1 /* Sync memory asynchronously. */ | |
| 65 | #define MS_SYNC 4 /* Synchronous memory sync. */ | |
| 66 | #define MS_INVALIDATE 2 /* Invalidate the caches. */ | |
| 67 | ||
| 68 | /* Flags for `mlockall'. */ | |
| 69 | #define MCL_CURRENT 1 /* Lock all currently mapped pages. */ | |
| 70 | #define MCL_FUTURE 2 /* Lock all additions to address | |
| 71 | space. */ | |
| 72 | ||
| 73 | /* Flags for `mremap'. */ | |
| 74 | #ifdef __USE_GNU | |
| 75 | # define MREMAP_MAYMOVE 1 | |
| 76 | #endif | |
| 77 | ||
| 78 | /* Advice to `madvise'. */ | |
| 79 | #ifdef __USE_BSD | |
| 80 | # define MADV_NORMAL 0 /* No further special treatment. */ | |
| 81 | # define MADV_RANDOM 1 /* Expect random page references. */ | |
| 82 | # define MADV_SEQUENTIAL 2 /* Expect sequential page references. */ | |
| 83 | # define MADV_WILLNEED 3 /* Will need these pages. */ | |
| 84 | # define MADV_DONTNEED 4 /* Don't need these pages. */ | |
| 85 | #endif | |
| 86 | ||
| 87 | /* The POSIX people had to invent similar names for the same things. */ | |
| 88 | #ifdef __USE_XOPEN2K | |
| 89 | # define POSIX_MADV_NORMAL 0 /* No further special treatment. */ | |
| 90 | # define POSIX_MADV_RANDOM 1 /* Expect random page references. */ | |
| 91 | # define POSIX_MADV_SEQUENTIAL 2 /* Expect sequential page references. */ | |
| 92 | # define POSIX_MADV_WILLNEED 3 /* Will need these pages. */ | |
| 93 | # define POSIX_MADV_DONTNEED 4 /* Don't need these pages. */ | |
| 94 | #endif |