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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2022-08-30 10:33:15 -0300 |
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| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2022-09-20 10:56:54 -0300 |
| commit | aeb4d2e9815d459e2640a31f5abb8ef803830107 (patch) | |
| tree | 54c8b49128a1c5a81bc9f3a04b60582266627cfc /sysdeps/unix/sysv/linux/m68k | |
| parent | c75d20b5b27b0a60f0678236f51a4d3b0b058c00 (diff) | |
| download | glibc-aeb4d2e9815d459e2640a31f5abb8ef803830107.zip glibc-aeb4d2e9815d459e2640a31f5abb8ef803830107.tar.gz glibc-aeb4d2e9815d459e2640a31f5abb8ef803830107.tar.bz2 | |
m68k: Enforce 4-byte alignment on internal locks (BZ #29537)
A new internal definition, __LIBC_LOCK_ALIGNMENT, is used to force
the 4-byte alignment only for m68k, other architecture keep the
natural alignment of the type used internally (and hppa does not
require 16-byte alignment for kernel-assisted CAS).
Reviewed-by: Florian Weimer <fweimer@redhat.com>
Diffstat (limited to 'sysdeps/unix/sysv/linux/m68k')
| -rw-r--r-- | sysdeps/unix/sysv/linux/m68k/libc-lock-arch.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/m68k/libc-lock-arch.h b/sysdeps/unix/sysv/linux/m68k/libc-lock-arch.h new file mode 100644 index 0000000..1844bba --- /dev/null +++ b/sysdeps/unix/sysv/linux/m68k/libc-lock-arch.h @@ -0,0 +1,25 @@ +/* Private libc-internal arch-specific definitions. m68k version. + Copyright (C) 2022 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; see the file COPYING.LIB. If + not, see <https://www.gnu.org/licenses/>. */ + +#ifndef _LIBC_LOCK_ARCH_H +#define _LIBC_LOCK_ARCH_H + +/* Linux enforces 4-bytes alignment on futex inputs. */ +#define __LIBC_LOCK_ALIGNMENT __attribute__ ((__aligned__ (4))) + +#endif |