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110 lines
4.5 KiB
C
110 lines
4.5 KiB
C
/* Definitions for POSIX memory map interface. Linux/HPPA version.
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Copyright (C) 1997, 1998, 2000, 2003 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _SYS_MMAN_H
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# error "Never use <bits/mman.h> directly; include <sys/mman.h> instead."
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#endif
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/* These are taken from the kernel definitions. */
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#define PROT_READ 0x1 /* Page can be read */
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#define PROT_WRITE 0x2 /* Page can be written */
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#define PROT_EXEC 0x4 /* Page can be executed */
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#define PROT_NONE 0x0 /* Page can not be accessed */
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#define PROT_GROWSDOWN 0x01000000 /* Extend change to start of
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growsdown vma (mprotect only). */
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#define PROT_GROWSUP 0x02000000 /* Extend change to start of
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growsup vma (mprotect only). */
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#define MAP_SHARED 0x01 /* Share changes */
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#define MAP_PRIVATE 0x02 /* Changes are private */
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#ifdef __USE_MISC
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# define MAP_TYPE 0x03 /* Mask for type of mapping */
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#endif
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/* Other flags. */
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#define MAP_FIXED 0x04 /* Interpret addr exactly */
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#ifdef __USE_MISC
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# define MAP_FILE 0x0
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# define MAP_ANONYMOUS 0x10 /* Don't use a file */
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# define MAP_ANON MAP_ANONYMOUS
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# define MAP_VARIABLE 0
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#endif
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/* These are Linux-specific. */
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#ifdef __USE_MISC
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# define MAP_DENYWRITE 0x0800 /* ETXTBSY */
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# define MAP_EXECUTABLE 0x1000 /* Mark it as an executable */
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# define MAP_LOCKED 0x2000 /* Pages are locked */
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# define MAP_NORESERVE 0x4000 /* Don't check for reservations */
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# define MAP_GROWSDOWN 0x8000 /* Stack-like segment */
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# define MAP_POPULATE 0x10000 /* Populate (prefault) pagetables */
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# define MAP_NONBLOCK 0x20000 /* Do not block on IO */
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#endif
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/* Flags to "msync" */
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#define MS_SYNC 1 /* Synchronous memory sync */
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#define MS_ASYNC 2 /* Sync memory asynchronously */
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#define MS_INVALIDATE 4 /* Invalidate the caches */
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/* Flags to "mlockall" */
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#define MCL_CURRENT 1 /* Lock all current mappings */
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#define MCL_FUTURE 2 /* Lock all future mappings */
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/* Flags for `mremap'. */
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#ifdef __USE_GNU
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# define MREMAP_MAYMOVE 1
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# define MREMAP_FIXED 2
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#endif
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/* Advice to "madvise" */
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#ifdef __USE_BSD
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# define MADV_NORMAL 0 /* No further special treatment */
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# define MADV_RANDOM 1 /* Expect random page references */
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# define MADV_SEQUENTIAL 2 /* Expect sequential page references */
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# define MADV_WILLNEED 3 /* Will need these pages */
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# define MADV_DONTNEED 4 /* Dont need these pages */
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# define MADV_SPACEAVAIL 5 /* Insure that resources are reserved */
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# define MADV_VPS_PURGE 6 /* Purge pages from VM page cache */
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# define MADV_VPS_INHERIT 7 /* Inherit parents page size */
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# define MADV_REMOVE 9 /* Remove these pages and resources. */
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# define MADV_DONTFORK 10 /* Do not inherit across fork. */
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# define MADV_DOFORK 11 /* Do inherit across fork. */
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# define MADV_MERGEABLE 65 /* KSM may merge identical pages */
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# define MADV_UNMERGEABLE 66 /* KSM may not merge identical pages */
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#endif
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/* The range 12-64 is reserved for page size specification. */
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#define MADV_4K_PAGES 12 /* Use 4K pages */
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#define MADV_16K_PAGES 14 /* Use 16K pages */
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#define MADV_64K_PAGES 16 /* Use 64K pages */
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#define MADV_256K_PAGES 18 /* Use 256K pages */
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#define MADV_1M_PAGES 20 /* Use 1 Megabyte pages */
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#define MADV_4M_PAGES 22 /* Use 4 Megabyte pages */
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#define MADV_16M_PAGES 24 /* Use 16 Megabyte pages */
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#define MADV_64M_PAGES 26 /* Use 64 Megabyte pages */
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/* The POSIX people had to invent similar names for the same things. */
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#ifdef __USE_XOPEN2K
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# define POSIX_MADV_NORMAL 0 /* No further special treatment. */
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# define POSIX_MADV_RANDOM 1 /* Expect random page references. */
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# define POSIX_MADV_SEQUENTIAL 2 /* Expect sequential page references. */
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# define POSIX_MADV_WILLNEED 3 /* Will need these pages. */
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# define POSIX_MADV_DONTNEED 4 /* Don't need these pages. */
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#endif
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