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/* $Id: alignmentchecks.h $ */
/** @file
* IPRT - Internal header for hacking alignment checks on x86 and AMD64.
*/
/*
* Copyright (C) 2009-2020 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
#ifndef IPRT_INCLUDED_INTERNAL_alignmentchecks_h
#define IPRT_INCLUDED_INTERNAL_alignmentchecks_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
/** @def IPRT_WITH_ALIGNMENT_CHECKS
* Enables or disables the alignment check feature and related hacks. */
#ifndef IPRT_WITH_ALIGNMENT_CHECKS
# if ( defined(DEBUG) && !defined(IN_GUEST) ) || defined(DOXYGEN_RUNNING)
# define IPRT_WITH_ALIGNMENT_CHECKS 1
# endif
#endif
/** @def IPRT_ALIGNMENT_CHECKS_DISABLE
* Disables alignment checks.
* Typically used before calling problematic library functions.
*/
/** @def IPRT_ALIGNMENT_CHECKS_ENABLE
* (re-)Enables alignment checks if they are supposed to be active.
* This is used to counter IPRT_ALIGNMENT_CHECKS_DISABLE as well as enabling
* them for the first time.
*/
#if defined(IPRT_WITH_ALIGNMENT_CHECKS) \
&& ( defined(RT_ARCH_AMD64) \
|| defined(RT_ARCH_X86) )
# include <iprt/asm-amd64-x86.h>
RT_C_DECLS_BEGIN
extern RTDATADECL(bool) g_fRTAlignmentChecks;
RT_C_DECLS_END
# define IPRT_ALIGNMENT_CHECKS_DISABLE() \
do { if (g_fRTAlignmentChecks) ASMSetFlags(ASMGetFlags() & ~RT_BIT_32(18)); } while (0)
# define IPRT_ALIGNMENT_CHECKS_ENABLE() \
do { if (g_fRTAlignmentChecks) ASMSetFlags(ASMGetFlags() | RT_BIT_32(18)); } while (0)
#else
# define IPRT_ALIGNMENT_CHECKS_DISABLE() do {} while (0)
# define IPRT_ALIGNMENT_CHECKS_ENABLE() do {} while (0)
#endif
#endif /* !IPRT_INCLUDED_INTERNAL_alignmentchecks_h */
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