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93 lines
3.6 KiB
C
93 lines
3.6 KiB
C
/* Definitions for POSIX memory map interface. Linux/MIPS version.
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Copyright (C) 1997, 2000, 2003, 2004 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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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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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/* The following definitions basically come from the kernel headers.
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But the kernel header is not namespace clean. */
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/* Protections are chosen from these bits, OR'd together. The
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implementation does not necessarily support PROT_EXEC or PROT_WRITE
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without PROT_READ. The only guarantees are that no writing will be
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allowed without PROT_WRITE and no access will be allowed for PROT_NONE. */
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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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/* Sharing types (must choose one and only one of these). */
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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 0x0f /* Mask for type of mapping. */
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#endif
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/* Other flags. */
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#define MAP_FIXED 0x10 /* Interpret addr exactly. */
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#ifdef __USE_MISC
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# define MAP_FILE 0x00
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# define MAP_ANONYMOUS 0x0800 /* Don't use a file. */
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# define MAP_ANON MAP_ANONYMOUS
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# define MAP_RENAME MAP_ANONYMOUS
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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_NORESERVE 0x0400 /* don't check for reservations */
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# define MAP_ANONYMOUS 0x0800 /* don't use a file */
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# define MAP_GROWSDOWN 0x1000 /* stack-like segment */
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# define MAP_DENYWRITE 0x2000 /* ETXTBSY */
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# define MAP_EXECUTABLE 0x4000 /* mark it as an executable */
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# define MAP_LOCKED 0x8000 /* pages are locked */
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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_ASYNC 1 /* Sync memory asynchronously. */
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#define MS_INVALIDATE 2 /* Invalidate the caches. */
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#define MS_SYNC 4 /* Synchronous memory sync. */
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/* Flags for `mlockall'. */
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#define MCL_CURRENT 1 /* Lock all currently mapped pages. */
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#define MCL_FUTURE 2 /* Lock all additions to address
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space. */
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/* Advice to `madvise'. */
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#ifdef __USE_BSD
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#define MADV_NORMAL 0 /* default page-in behavior */
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#define MADV_RANDOM 1 /* page-in minimum required */
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#define MADV_SEQUENTIAL 2 /* read-ahead aggressively */
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#define MADV_WILLNEED 3 /* pre-fault pages */
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#define MADV_DONTNEED 4 /* discard these pages */
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#endif
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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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#endif
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