581c785bf3
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
56 lines
1.8 KiB
C
56 lines
1.8 KiB
C
/* Helper functions for manipulating memory protection keys, for powerpc64.
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Copyright (C) 2017-2022 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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<http://www.gnu.org/licenses/>. */
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#ifndef _ARCH_PKEY_H
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#define _ARCH_PKEY_H
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/* Read and write access bits in the AMR register. Needs to be
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translated from and to PKEY_DISABLE_* flags. */
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#define PKEY_AMR_READ 1UL
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#define PKEY_AMR_WRITE 2UL
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/* Return the value of the AMR register. */
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static inline unsigned long int
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pkey_read (void)
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{
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unsigned long int result;
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__asm__ volatile ("mfspr %0, 13" : "=r" (result));
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return result;
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}
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/* Overwrite the AMR register with VALUE. */
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static inline void
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pkey_write (unsigned long int value)
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{
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__asm__ volatile ("isync; mtspr 13, %0; isync" : : "r" (value));
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}
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/* Number of the largest supported key. This depends on the width of
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the AMR register. */
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#define PKEY_MAX (sizeof (unsigned long int) * 8 / 2 - 1)
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_Static_assert (PKEY_MAX == 15 || PKEY_MAX == 31, "PKEY_MAX value");
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/* Translate key number into AMR index position. */
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static inline int
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pkey_index (int key)
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{
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return 2 * (PKEY_MAX - key);
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}
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#endif /* _ARCH_PKEY_H */
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