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usr
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include
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bits
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mman-shared.h
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/* 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 */