1 /* Definitions for POSIX memory map interface. Linux/Alpha version. 2 Copyright (C) 1997-2021 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 The GNU C Library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library. If not, see 17 <https://www.gnu.org/licenses/>. */ 18 19 #ifndef _SYS_MMAN_H 20 # error "Never use <bits/mman.h> directly; include <sys/mman.h> instead." 21 #endif 22 23 /* The following definitions basically come from the kernel headers. 24 But the kernel header is not namespace clean. */ 25 26 #define __MAP_ANONYMOUS 0x10 /* Don't use a file. */ 27 28 /* These are Linux-specific. */ 29 #ifdef __USE_MISC 30 # define MAP_GROWSDOWN 0x01000 /* Stack-like segment. */ 31 # define MAP_DENYWRITE 0x02000 /* ETXTBSY */ 32 # define MAP_EXECUTABLE 0x04000 /* Mark it as an executable. */ 33 # define MAP_LOCKED 0x08000 /* Lock the mapping. */ 34 # define MAP_NORESERVE 0x10000 /* Don't check for reservations. */ 35 # define MAP_POPULATE 0x20000 /* Populate (prefault) pagetables. */ 36 # define MAP_NONBLOCK 0x40000 /* Do not block on IO. */ 37 # define MAP_STACK 0x80000 /* Allocation is for a stack. */ 38 # define MAP_HUGETLB 0x100000 /* Create huge page mapping. */ 39 # define MAP_FIXED_NOREPLACE 0x200000 /* MAP_FIXED but do not unmap 40 underlying mapping. */ 41 #endif 42 43 /* Flags for `mlockall'. */ 44 #define MCL_CURRENT 8192 45 #define MCL_FUTURE 16384 46 #define MCL_ONFAULT 32768 47 48 #include <bits/mman-linux.h> 49 50 /* Values that differ from standard <mman-linux.h>. For the most part newer 51 values are shared, but older values are skewed. */ 52 53 #undef MAP_FIXED 54 #define MAP_FIXED 0x100 55 56 #undef MS_SYNC 57 #define MS_SYNC 2 58 #undef MS_INVALIDATE 59 #define MS_INVALIDATE 4 60 61 #ifdef __USE_MISC 62 # undef MADV_DONTNEED 63 # define MADV_DONTNEED 6 64 #endif 65 #ifdef __USE_XOPEN2K 66 # undef POSIX_MADV_DONTNEED 67 # define POSIX_MADV_DONTNEED 6 68 #endif 69