bits/mman.h: consolidate header file

Sync with GNU C library and consolidate duplicate non
architecture specific defines.
MAP_UNINITIALIZED is only defined to 0x4000000 and used by
the Linux kernel when CONFIG_MMAP_ALLOW_UNINITIALIZED is enabled.
CONFIG_MMAP_ALLOW_UNINITIALIZED is only available for nommu.
See Documentation/nommu-mmap.txt.

1 files changed, 25 insertions, 79 deletions

diff --git a/libc/sysdeps/linux/alpha/bits/mman.h b/libc/sysdeps/linux/alpha/bits/mman.h
index a9820d596..7d9b622af 100644
--- a/libc/sysdeps/linux/alpha/bits/mman.h
+++ b/libc/sysdeps/linux/alpha/bits/mman.h
@@ -1,6 +1,5 @@
 /* Definitions for POSIX memory map interface.  Linux/Alpha version.
-   Copyright (C) 1997, 1998, 2000, 2003, 2006 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
+   Copyright (C) 1997-2018 Free Software Foundation, Inc.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
@@ -13,7 +12,7 @@
    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
+   License along with the GNU C Library.  If not, see
    <http://www.gnu.org/licenses/>.  */
 
 #ifndef _SYS_MMAN_H
@@ -23,43 +22,7 @@
 /* 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	  0x100		/* Interpret addr exactly.  */
-#ifdef __USE_MISC
-# define MAP_FILE	  0
-# define MAP_ANONYMOUS	  0x10		/* Don't use a file.  */
-# define MAP_ANON	  MAP_ANONYMOUS
-#endif
-
-/* Not used by Linux, but here to make sure we don't clash with
-   OSF/1 defines.  */
-#if 0 && defined __USE_BSD
-# define MAP_HASSEMAPHORE 0x0200
-# define MAP_INHERIT	  0x0400
-# define MAP_UNALIGNED	  0x0800
-#endif
+#define __MAP_ANONYMOUS	  0x10		/* Don't use a file.  */
 
 /* These are Linux-specific.  */
 #ifdef __USE_MISC
@@ -70,50 +33,33 @@
 # define MAP_NORESERVE	  0x10000	/* Don't check for reservations.  */
 # define MAP_POPULATE	  0x20000	/* Populate (prefault) pagetables.  */
 # define MAP_NONBLOCK	  0x40000	/* Do not block on IO.  */
-# define MAP_UNINITIALIZED 0x4000000    /* For anonymous mmap, memory could
-					   be uninitialized. */
+# define MAP_STACK	  0x80000	/* Allocation is for a stack.  */
+# define MAP_HUGETLB	  0x100000	/* Create huge page mapping.  */
 #endif
 
-/* Flags to `msync'.  */
-#define MS_ASYNC	  1		/* Sync memory asynchronously.  */
-#define MS_SYNC		  2		/* Synchronous memory sync.  */
-#define MS_INVALIDATE	  4		/* Invalidate the caches.  */
-
 /* Flags for `mlockall'.  */
-#define MCL_CURRENT	  8192		/* Lock all currently mapped pages.  */
-#define MCL_FUTURE	  16384		/* Lock all additions to address
-					   space.  */
+#define MCL_CURRENT	  8192
+#define MCL_FUTURE	  16384
+#define MCL_ONFAULT	  32768
 
-/* Flags for `mremap'.  */
-#ifdef __USE_GNU
-# define MREMAP_MAYMOVE	1
-# define MREMAP_FIXED	2
-#endif
+#include <bits/mman-linux.h>
 
-/* 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   6	/* 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.  */
-#endif
+/* Values that differ from standard <mman-linux.h>.  For the most part newer
+   values are shared, but older values are skewed.  */
 
-/* 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	6 /* Don't need these pages.  */
-#endif
+#undef  MAP_FIXED
+#define MAP_FIXED	  0x100
 
-/* Not used by Linux, but here to make sure we don't clash with
-   OSF/1 defines.  */
-#if 0 && defined __USE_BSD
-# define MADV_DONTNEED_COMPAT 4	/* Old version?  */
-# define MADV_SPACEAVAIL 5	/* Ensure resources are available.  */
+#undef  MS_SYNC
+#define MS_SYNC		  2
+#undef  MS_INVALIDATE
+#define MS_INVALIDATE	  4
+
+#ifdef __USE_MISC
+# undef  MADV_DONTNEED
+# define MADV_DONTNEED    6
+#endif
+#ifdef __USE_XOPEN2K
+# undef  POSIX_MADV_DONTNEED
+# define POSIX_MADV_DONTNEED	6
 #endif