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[PATCH] alpha bits/mman.h vs mman-linux.h
- From: Richard Henderson <rth at twiddle dot net>
- To: GNU C Library <libc-alpha at sourceware dot org>
- Cc: "Joseph S. Myers" <joseph at codesourcery dot com>
- Date: Sat, 07 Dec 2013 05:31:54 +1300
- Subject: [PATCH] alpha bits/mman.h vs mman-linux.h
- Authentication-results: sourceware.org; auth=none
Joseph mentions in the wiki that alpha isn't using <bits/mman-linux.h>. I'd
been avoiding this because mman-linux.h isn't quite as configurable as it might
be, but here's a first cut.
Is this reasonable, with the undefs? Ought I play more with __FOO as we
already do for __MAP_ANONYMOUS?
Since the diff is larger than the new file, and harder to read, I attach the
whole thing for review.
/* Definitions for POSIX memory map interface. Linux/Alpha version.
Copyright (C) 1997-2013 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
# error "Never use <bits/mman.h> directly; include <sys/mman.h> instead."
/* The following definitions basically come from the kernel headers.
But the kernel header is not namespace clean. */
#define __MAP_ANONYMOUS 0x10 /* Don't use a file. */
/* These are Linux-specific. */
# define MAP_GROWSDOWN 0x01000 /* Stack-like segment. */
# define MAP_DENYWRITE 0x02000 /* ETXTBSY */
# define MAP_EXECUTABLE 0x04000 /* Mark it as an executable. */
# define MAP_LOCKED 0x08000 /* Lock the mapping. */
# 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_STACK 0x80000 /* Allocation is for a stack. */
# define MAP_HUGETLB 0x100000 /* Create huge page mapping. */
/* Flags for `mlockall'. */
#define MCL_CURRENT 8192
#define MCL_FUTURE 16384
/* Values that differ from standard <mman-linux.h>. For the most part newer
values are shared, but older values are skewed. */
#define MAP_FIXED 0x100
#define MS_SYNC 2
#define MS_INVALIDATE 4
# undef MADV_DONTNEED
# define MADV_DONTNEED 6
# undef POSIX_MADV_DONTNEED
# define POSIX_MADV_DONTNEED 6