mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-30 10:45:40 +03:00
113 lines
4.6 KiB
C
113 lines
4.6 KiB
C
/* Definitions for POSIX memory map interface. Linux/HPPA version.
|
|
Copyright (C) 1997-2015 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, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef _SYS_MMAN_H
|
|
# error "Never use <bits/mman.h> directly; include <sys/mman.h> instead."
|
|
#endif
|
|
|
|
/* These are taken from the kernel definitions. */
|
|
|
|
#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). */
|
|
|
|
#define MAP_SHARED 0x01 /* Share changes */
|
|
#define MAP_PRIVATE 0x02 /* Changes are private */
|
|
#ifdef __USE_MISC
|
|
# define MAP_TYPE 0x03 /* Mask for type of mapping */
|
|
#endif
|
|
|
|
/* Other flags. */
|
|
#define MAP_FIXED 0x04 /* Interpret addr exactly */
|
|
#ifdef __USE_MISC
|
|
# define MAP_FILE 0x0
|
|
# define MAP_ANONYMOUS 0x10 /* Don't use a file */
|
|
# define MAP_ANON MAP_ANONYMOUS
|
|
# define MAP_VARIABLE 0
|
|
/* When MAP_HUGETLB is set bits [26:31] encode the log2 of the huge page size. */
|
|
# define MAP_HUGE_SHIFT 26
|
|
# define MAP_HUGE_MASK 0x3f
|
|
#endif
|
|
|
|
/* These are Linux-specific. */
|
|
#ifdef __USE_MISC
|
|
# define MAP_DENYWRITE 0x0800 /* ETXTBSY */
|
|
# define MAP_EXECUTABLE 0x1000 /* Mark it as an executable */
|
|
# define MAP_LOCKED 0x2000 /* Pages are locked */
|
|
# define MAP_NORESERVE 0x4000 /* Don't check for reservations */
|
|
# define MAP_GROWSDOWN 0x8000 /* Stack-like segment */
|
|
# define MAP_POPULATE 0x10000 /* Populate (prefault) pagetables */
|
|
# define MAP_NONBLOCK 0x20000 /* Do not block on IO */
|
|
#endif
|
|
|
|
/* Flags to "msync" */
|
|
#define MS_SYNC 1 /* Synchronous memory sync */
|
|
#define MS_ASYNC 2 /* Sync memory asynchronously */
|
|
#define MS_INVALIDATE 4 /* Invalidate the caches */
|
|
|
|
/* Flags to "mlockall" */
|
|
#define MCL_CURRENT 1 /* Lock all current mappings */
|
|
#define MCL_FUTURE 2 /* Lock all future mappings */
|
|
|
|
/* Flags for `mremap'. */
|
|
#ifdef __USE_GNU
|
|
# define MREMAP_MAYMOVE 1
|
|
# define MREMAP_FIXED 2
|
|
#endif
|
|
|
|
/* Advice to "madvise" */
|
|
#ifdef __USE_MISC
|
|
# 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 /* Dont need these pages */
|
|
# define MADV_SPACEAVAIL 5 /* Insure that resources are reserved */
|
|
# define MADV_VPS_PURGE 6 /* Purge pages from VM page cache */
|
|
# define MADV_VPS_INHERIT 7 /* Inherit parents page size */
|
|
# 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 65 /* KSM may merge identical pages */
|
|
# define MADV_UNMERGEABLE 66 /* KSM may not merge identical pages */
|
|
#endif
|
|
|
|
/* The range 12-64 is reserved for page size specification. */
|
|
#define MADV_4K_PAGES 12 /* Use 4K pages */
|
|
#define MADV_16K_PAGES 14 /* Use 16K pages */
|
|
#define MADV_64K_PAGES 16 /* Use 64K pages */
|
|
#define MADV_256K_PAGES 18 /* Use 256K pages */
|
|
#define MADV_1M_PAGES 20 /* Use 1 Megabyte pages */
|
|
#define MADV_4M_PAGES 22 /* Use 4 Megabyte pages */
|
|
#define MADV_16M_PAGES 24 /* Use 16 Megabyte pages */
|
|
#define MADV_64M_PAGES 26 /* Use 64 Megabyte pages */
|
|
|
|
/* 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
|