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/* mprotect with a memory protection key.
Copyright (C) 2017-2020 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/>. */
#include <errno.h>
#include <sys/mman.h>
#include <sys/syscall.h>
#include <sysdep.h>
int
pkey_mprotect (void *addr, size_t len, int prot, int pkey)
{
if (pkey == -1)
/* If the key is -1, the system call is precisely equivalent to
mprotect. */
return __mprotect (addr, len, prot);
#ifdef __NR_pkey_mprotect
return INLINE_SYSCALL_CALL (pkey_mprotect, addr, len, prot, pkey);
#else
__set_errno (ENOSYS);
return -1;
#endif
}
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