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38 lines
1.2 KiB
C
38 lines
1.2 KiB
C
/* mprotect with a memory protection key.
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Copyright (C) 2017-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <sys/mman.h>
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#include <sys/syscall.h>
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#include <sysdep.h>
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int
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pkey_mprotect (void *addr, size_t len, int prot, int pkey)
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{
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if (pkey == -1)
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/* If the key is -1, the system call is precisely equivalent to
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mprotect. */
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return __mprotect (addr, len, prot);
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#ifdef __NR_pkey_mprotect
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return INLINE_SYSCALL_CALL (pkey_mprotect, addr, len, prot, pkey);
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#else
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__set_errno (ENOSYS);
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return -1;
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#endif
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}
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