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| 1 | /* Definitions for POSIX memory map interface. Linux/Alpha version. |
|---|---|
| 2 | Copyright (C) 1997-2022 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 |
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