CPUMRC.cpp revision efb8c027d35c5fb832323d3062eccce2e6619e74
/* $Id$ */
/** @file
* CPUM - Guest Context Code.
*/
/*
* Copyright (C) 2006-2007 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.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#define LOG_GROUP LOG_GROUP_CPUM
#include <VBox/cpum.h>
#include <VBox/vmm.h>
#include <VBox/trpm.h>
#include "CPUMInternal.h"
#include <VBox/vm.h>
#include <VBox/err.h>
#include <iprt/assert.h>
#include <VBox/log.h>
/*******************************************************************************
* Internal Functions *
*******************************************************************************/
RT_C_DECLS_BEGIN /* addressed from asm (not called so no DECLASM). */
DECLCALLBACK(int) cpumGCHandleNPAndGP(PVM pVM, PCPUMCTXCORE pRegFrame, uintptr_t uUser);
RT_C_DECLS_END
/**
* Deal with traps occurring during segment loading and IRET
* when resuming guest context.
*
* @returns VBox status code.
* @param pVM The VM handle.
* @param pRegFrame The register frame.
* @param uUser User argument. In this case a combination of the
* CPUM_HANDLER_* \#defines.
*/
DECLCALLBACK(int) cpumGCHandleNPAndGP(PVM pVM, PCPUMCTXCORE pRegFrame, uintptr_t uUser)
{
Log(("********************************************************\n"));
Log(("cpumGCHandleNPAndGP: eip=%RX32 uUser=%#x\n", pRegFrame->eip, uUser));
Log(("********************************************************\n"));
PVMCPU pVCpu = VMMGetCpu0(pVM);
/*
* Update the guest cpu state.
*/
if (uUser & CPUM_HANDLER_CTXCORE_IN_EBP)
{
PCPUMCTXCORE pGstCtxCore = (PCPUMCTXCORE)CPUMGetGuestCtxCore(pVCpu);
PCCPUMCTXCORE pGstCtxCoreSrc = (PCPUMCTXCORE)pRegFrame->ebp;
*pGstCtxCore = *pGstCtxCoreSrc;
}
/*
* Take action based on what's happened.
*/
switch (uUser & CPUM_HANDLER_TYPEMASK)
{
case CPUM_HANDLER_GS:
// if (!pVM->cpum.s.Guest.ldtr)
// {
// pRegFrame->gs = 0;
// pRegFrame->eip += 6; /* mov gs, [edx + CPUM.Guest.gs] */
// return VINF_SUCCESS;
// }
case CPUM_HANDLER_DS:
case CPUM_HANDLER_ES:
case CPUM_HANDLER_FS:
TRPMGCHyperReturnToHost(pVM, VINF_EM_RAW_STALE_SELECTOR);
break;
/* Make sure we restore the guest context from the interrupt stack frame. */
case CPUM_HANDLER_IRET:
{
PCPUMCTXCORE pGstCtxCore = (PCPUMCTXCORE)CPUMGetGuestCtxCore(pVCpu);
uint32_t *pEsp = (uint32_t *)pRegFrame->esp;
/* Sync general purpose registers */
*pGstCtxCore = *pRegFrame;
pGstCtxCore->eip = *pEsp++;
pGstCtxCore->cs = (RTSEL)*pEsp++;
pGstCtxCore->eflags.u32 = *pEsp++;
pGstCtxCore->esp = *pEsp++;
pGstCtxCore->ss = (RTSEL)*pEsp++;
if (pGstCtxCore->eflags.Bits.u1VM)
{
pGstCtxCore->es = (RTSEL)*pEsp++;
pGstCtxCore->ds = (RTSEL)*pEsp++;
pGstCtxCore->fs = (RTSEL)*pEsp++;
pGstCtxCore->gs = (RTSEL)*pEsp++;
}
TRPMGCHyperReturnToHost(pVM, VINF_EM_RAW_IRET_TRAP);
break;
}
}
return VERR_TRPM_DONT_PANIC;
}