| /* Definitions for POSIX memory map interface. Linux/generic version. |
| Copyright (C) 1997,2000,2003,2005,2006,2009 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #ifndef _SYS_MMAN_H |
| # error "Never use <bits/mman.h> directly; include <sys/mman.h> instead." |
| #endif |
| |
| /* The following definitions basically come from the kernel headers. |
| But the kernel header is not namespace clean. */ |
| |
| |
| /* Protections are chosen from these bits, OR'd together. The |
| implementation does not necessarily support PROT_EXEC or PROT_WRITE |
| without PROT_READ. The only guarantees are that no writing will be |
| allowed without PROT_WRITE and no access will be allowed for PROT_NONE. */ |
| |
| #define PROT_READ 0x1 /* Page can be read. */ |
| #define PROT_WRITE 0x2 /* Page can be written. */ |
| #define PROT_EXEC 0x4 /* Page can be executed. */ |
| #define PROT_NONE 0x0 /* Page can not be accessed. */ |
| #define PROT_GROWSDOWN 0x01000000 /* Extend change to start of |
| growsdown vma (mprotect only). */ |
| #define PROT_GROWSUP 0x02000000 /* Extend change to start of |
| growsup vma (mprotect only). */ |
| |
| /* Sharing types (must choose one and only one of these). */ |
| #define MAP_SHARED 0x01 /* Share changes. */ |
| #define MAP_PRIVATE 0x02 /* Changes are private. */ |
| #ifdef __USE_MISC |
| # define MAP_TYPE 0x0f /* Mask for type of mapping. */ |
| #endif |
| |
| /* Other flags. */ |
| #define MAP_FIXED 0x10 /* Interpret addr exactly. */ |
| #ifdef __USE_MISC |
| # define MAP_FILE 0 |
| # define MAP_ANONYMOUS 0x20 /* Don't use a file. */ |
| # define MAP_ANON MAP_ANONYMOUS |
| #endif |
| |
| /* These are Linux-specific. */ |
| #ifdef __USE_MISC |
| # define MAP_GROWSDOWN 0x00100 /* Stack-like segment. */ |
| # define MAP_DENYWRITE 0x00800 /* ETXTBSY */ |
| # define MAP_EXECUTABLE 0x01000 /* Mark it as an executable. */ |
| # define MAP_LOCKED 0x02000 /* Lock the mapping. */ |
| # define MAP_NORESERVE 0x04000 /* Don't check for reservations. */ |
| # define MAP_POPULATE 0x08000 /* Populate (prefault) pagetables. */ |
| # define MAP_NONBLOCK 0x10000 /* Do not block on IO. */ |
| # define MAP_STACK 0x20000 /* Allocation is for a stack. */ |
| # define MAP_UNINITIALIZE 0x4000000 /* For anonymous mmap, memory could |
| be uninitialized. */ |
| #endif |
| |
| /* Flags to `msync'. */ |
| #define MS_ASYNC 1 /* Sync memory asynchronously. */ |
| #define MS_SYNC 4 /* Synchronous memory sync. */ |
| #define MS_INVALIDATE 2 /* Invalidate the caches. */ |
| |
| /* Flags for `mlockall'. */ |
| #define MCL_CURRENT 1 /* Lock all currently mapped pages. */ |
| #define MCL_FUTURE 2 /* Lock all additions to address |
| space. */ |
| |
| /* Flags for `mremap'. */ |
| #ifdef __USE_GNU |
| # define MREMAP_MAYMOVE 1 |
| # define MREMAP_FIXED 2 |
| #endif |
| |
| /* Advice to `madvise'. */ |
| #ifdef __USE_BSD |
| # define MADV_NORMAL 0 /* No further special treatment. */ |
| # define MADV_RANDOM 1 /* Expect random page references. */ |
| # define MADV_SEQUENTIAL 2 /* Expect sequential page references. */ |
| # define MADV_WILLNEED 3 /* Will need these pages. */ |
| # define MADV_DONTNEED 4 /* Don't need these pages. */ |
| # define MADV_REMOVE 9 /* Remove these pages and resources. */ |
| # define MADV_DONTFORK 10 /* Do not inherit across fork. */ |
| # define MADV_DOFORK 11 /* Do inherit across fork. */ |
| # define MADV_MERGEABLE 12 /* KSM may merge identical pages. */ |
| # define MADV_UNMERGEABLE 13 /* KSM may not merge identical pages. */ |
| # define MADV_HWPOISON 100 /* Poison a page for testing. */ |
| #endif |
| |
| /* The POSIX people had to invent similar names for the same things. */ |
| #ifdef __USE_XOPEN2K |
| # define POSIX_MADV_NORMAL 0 /* No further special treatment. */ |
| # define POSIX_MADV_RANDOM 1 /* Expect random page references. */ |
| # define POSIX_MADV_SEQUENTIAL 2 /* Expect sequential page references. */ |
| # define POSIX_MADV_WILLNEED 3 /* Will need these pages. */ |
| # define POSIX_MADV_DONTNEED 4 /* Don't need these pages. */ |
| #endif |
