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/* $Id: bs3-cmn-RegCtxSetRipCsFromLnkPtr.c $ */
/** @file
* BS3Kit - Bs3RegCtxSetRipCsFromLnkPtr
*/
/*
* Copyright (C) 2007-2019 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.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include "bs3kit-template-header.h"
#undef Bs3RegCtxSetRipCsFromLnkPtr
BS3_CMN_DEF(void, Bs3RegCtxSetRipCsFromLnkPtr,(PBS3REGCTX pRegCtx, FPFNBS3FAR pfnCode))
{
if (BS3_MODE_IS_16BIT_CODE(pRegCtx->bMode))
{
#if ARCH_BITS == 16
pRegCtx->rip.u = BS3_FP_OFF(pfnCode);
if (BS3_MODE_IS_RM_OR_V86(pRegCtx->bMode))
pRegCtx->cs = BS3_FP_SEG(pfnCode);
else
pRegCtx->cs = Bs3SelRealModeCodeToProtMode(BS3_FP_SEG(pfnCode));
#else
uint32_t uFar1616;
if (BS3_MODE_IS_RM_OR_V86(pRegCtx->bMode))
uFar1616 = Bs3SelFlatCodeToRealMode((uint32_t)(uintptr_t)pfnCode);
else
uFar1616 = Bs3SelFlatCodeToProtFar16((uint32_t)(uintptr_t)pfnCode);
pRegCtx->rip.u = uFar1616 & UINT16_MAX;
pRegCtx->cs = uFar1616 >> 16;
#endif
}
else
{
#if ARCH_BITS == 16
pRegCtx->rip.u = Bs3SelRealModeCodeToFlat(pfnCode);
#else
pRegCtx->rip.u = (uintptr_t)pfnCode;
#endif
if (BS3_MODE_IS_32BIT_CODE(pRegCtx->bMode))
pRegCtx->cs = BS3_SEL_R0_CS32;
else
pRegCtx->cs = BS3_SEL_R0_CS64;
}
/* Adjust CS to the right ring, if not ring-0 or V86 context. */
if ( pRegCtx->bCpl != 0
&& !BS3_MODE_IS_RM_OR_V86(pRegCtx->bMode)
&& BS3_SEL_IS_IN_R0_RANGE(pRegCtx->cs))
{
pRegCtx->cs += (uint16_t)pRegCtx->bCpl << BS3_SEL_RING_SHIFT;
pRegCtx->cs |= pRegCtx->bCpl;
}
}
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