1 /* Definitions for POSIX memory map interface. Linux/HPPA 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 /* These are taken from the kernel definitions. */ 24 25 /* Other flags. */ 26 #define __MAP_ANONYMOUS 0x10 /* Don't use a file */ 27 #ifdef __USE_MISC 28 # define MAP_VARIABLE 0 29 #endif 30 31 /* These are Linux-specific. */ 32 #ifdef __USE_MISC 33 # define MAP_DENYWRITE 0x0800 /* ETXTBSY */ 34 # define MAP_EXECUTABLE 0x1000 /* Mark it as an executable */ 35 # define MAP_LOCKED 0x2000 /* Pages are locked */ 36 # define MAP_NORESERVE 0x4000 /* Don't check for reservations */ 37 # define MAP_GROWSDOWN 0x8000 /* Stack-like segment */ 38 # define MAP_POPULATE 0x10000 /* Populate (prefault) pagetables */ 39 # define MAP_NONBLOCK 0x20000 /* Do not block on IO */ 40 # define MAP_STACK 0x40000 /* Create for process/thread stacks */ 41 # define MAP_HUGETLB 0x80000 /* Create a huge page mapping */ 42 # define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED but do not unmap 43 underlying mapping. */ 44 #endif 45 46 /* Advice to "madvise" */ 47 #ifdef __USE_MISC 48 # define MADV_SOFT_OFFLINE 101 /* Soft offline page for testing. */ 49 #endif 50 51 #include <bits/mman-linux.h> 52 53 #ifdef __USE_MISC 54 # undef MAP_TYPE 55 # define MAP_TYPE 0x2b /* Mask for type of mapping */ 56 #endif 57 58 #undef MAP_FIXED 59 #define MAP_FIXED 0x04 /* Interpret addr exactly */ 60 61 /* Flags to "msync" */ 62 #undef MS_SYNC 63 #define MS_SYNC 1 /* Synchronous memory sync */ 64 #undef MS_ASYNC 65 #define MS_ASYNC 2 /* Sync memory asynchronously */ 66 #undef MS_INVALIDATE 67 #define MS_INVALIDATE 4 /* Invalidate the caches */ 68 69 /* Advice to "madvise" */ 70 #ifdef __USE_MISC 71 # undef MADV_MERGEABLE 72 # define MADV_MERGEABLE 65 /* KSM may merge identical pages */ 73 # undef MADV_UNMERGEABLE 74 # define MADV_UNMERGEABLE 66 /* KSM may not merge identical pages */ 75 # undef MADV_HUGEPAGE 76 # define MADV_HUGEPAGE 67 /* Worth backing with hugepages */ 77 # undef MADV_NOHUGEPAGE 78 # define MADV_NOHUGEPAGE 68 /* Not worth backing with hugepages */ 79 # undef MADV_DONTDUMP 80 # define MADV_DONTDUMP 69 /* Explicity exclude from the core dump, 81 overrides the coredump filter bits */ 82 # undef MADV_DODUMP 83 # define MADV_DODUMP 70 /* Clear the MADV_NODUMP flag */ 84 # undef MADV_WIPEONFORK 85 # define MADV_WIPEONFORK 71 /* Zero memory on fork, child only. */ 86 # undef MADV_KEEPONFORK 87 # define MADV_KEEPONFORK 72 /* Undo MADV_WIPEONFORK. */ 88 #endif 89