From aeb4d2e9815d459e2640a31f5abb8ef803830107 Mon Sep 17 00:00:00 2001 From: Adhemerval Zanella Date: Tue, 30 Aug 2022 10:33:15 -0300 Subject: 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 --- sysdeps/unix/sysv/linux/m68k/libc-lock-arch.h | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 sysdeps/unix/sysv/linux/m68k/libc-lock-arch.h (limited to 'sysdeps/unix') 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 0000000000..1844bbaf6f --- /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 . */ + +#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 -- cgit v1.2.3-70-g09d2