| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081 |
- /* Memory-mapping-related declarations/definitions, not architecture-specific.
- Copyright (C) 2017-2021 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
- <https://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 mremap. */
- # define MREMAP_MAYMOVE 1
- # define MREMAP_FIXED 2
- # define MREMAP_DONTUNMAP 4
- /* 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 */
|
