mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-25 04:01:10 +00:00
108 lines
4.4 KiB
C
108 lines
4.4 KiB
C
/* Definitions for POSIX memory map interface. Linux/s390 version.
|
|
Copyright (C) 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_GROWSUP 0x00200 /* Register 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. */
|
|
#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
|