/* Definitions for POSIX memory map interface. Linux/MIPS version. Copyright (C) 1997, 2000 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 Library General Public License as published by the Free Software Foundation; either version 2 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with the GNU C Library; see the file COPYING.LIB. 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. */ /* 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 0x00 # define MAP_ANONYMOUS 0x0800 /* Don't use a file. */ # define MAP_ANON MAP_ANONYMOUS # define MAP_RENAME MAP_ANONYMOUS #endif /* These are Linux-specific. */ #ifdef __USE_MISC # define MAP_NORESERVE 0x0400 /* don't check for reservations */ # define MAP_ANONYMOUS 0x0800 /* don't use a file */ # define MAP_GROWSDOWN 0x1000 /* stack-like segment */ # define MAP_DENYWRITE 0x2000 /* ETXTBSY */ # define MAP_EXECUTABLE 0x4000 /* mark it as an executable */ # define MAP_LOCKED 0x8000 /* pages are locked */ #endif /* Flags to `msync'. */ #define MS_ASYNC 1 /* Sync memory asynchronously. */ #define MS_INVALIDATE 2 /* Invalidate the caches. */ #define MS_SYNC 4 /* Synchronous memory sync. */ /* Flags for `mlockall'. */ #define MCL_CURRENT 1 /* Lock all currently mapped pages. */ #define MCL_FUTURE 2 /* Lock all additions to address space. */ /* Advice to `madvise'. */ #ifdef __USE_BSD #define MADV_NORMAL 0 /* default page-in behavior */ #define MADV_RANDOM 1 /* page-in minimum required */ #define MADV_SEQUENTIAL 2 /* read-ahead aggressively */ #define MADV_WILLNEED 3 /* pre-fault pages */ #define MADV_DONTNEED 4 /* discard these pages */ #endif /* Flags for `mremap'. */ #ifdef __USE_GNU # define MREMAP_MAYMOVE 1 #endif