| /* Memory-mapping-related declarations/definitions, not architecture-specific. |
| Copyright (C) 2017-2018 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 |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef _SYS_MMAN_H |
| # error "Never use <bits/mman-shared.h> directly; include <sys/mman.h> instead." |
| #endif |
| |
| #ifdef __USE_GNU |
| /* Flags for memfd_create. */ |
| # ifndef MFD_CLOEXEC |
| # define MFD_CLOEXEC 1U |
| # define MFD_ALLOW_SEALING 2U |
| # define MFD_HUGETLB 4U |
| # endif |
| |
| /* Flags for mlock2. */ |
| # ifndef MLOCK_ONFAULT |
| # define MLOCK_ONFAULT 1U |
| # endif |
| |
| /* Access rights for pkey_alloc. */ |
| # ifndef PKEY_DISABLE_ACCESS |
| # define PKEY_DISABLE_ACCESS 0x1 |
| # define PKEY_DISABLE_WRITE 0x2 |
| # endif |
| |
| __BEGIN_DECLS |
| |
| /* Create a new memory file descriptor. NAME is a name for debugging. |
| FLAGS is a combination of the MFD_* constants. */ |
| int memfd_create (const char *__name, unsigned int __flags) __THROW; |
| |
| /* Lock pages from ADDR (inclusive) to ADDR + LENGTH (exclusive) into |
| memory. FLAGS is a combination of the MLOCK_* flags above. */ |
| int mlock2 (const void *__addr, size_t __length, unsigned int __flags) __THROW; |
| |
| /* Allocate a new protection key, with the PKEY_DISABLE_* bits |
| specified in ACCESS_RIGHTS. The protection key mask for the |
| current thread is updated to match the access privilege for the new |
| key. */ |
| int pkey_alloc (unsigned int __flags, unsigned int __access_rights) __THROW; |
| |
| /* Update the access rights for the current thread for KEY, which must |
| have been allocated using pkey_alloc. */ |
| int pkey_set (int __key, unsigned int __access_rights) __THROW; |
| |
| /* Return the access rights for the current thread for KEY, which must |
| have been allocated using pkey_alloc. */ |
| int pkey_get (int __key) __THROW; |
| |
| /* Free an allocated protection key, which must have been allocated |
| using pkey_alloc. */ |
| int pkey_free (int __key) __THROW; |
| |
| /* Apply memory protection flags for KEY to the specified address |
| range. */ |
| int pkey_mprotect (void *__addr, size_t __len, int __prot, int __pkey) __THROW; |
| |
| __END_DECLS |
| |
| #endif /* __USE_GNU */ |
