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Viewing changes to src/VBox/VMM/VMMGC/CPUMGC.cpp

  • Committer: Bazaar Package Importer
  • Author(s): Felix Geyer
  • Date: 2011-01-30 23:27:25 UTC
  • mfrom: (0.3.12 upstream)
  • Revision ID: james.westby@ubuntu.com-20110130232725-2ouajjd2ggdet0zd
Tags: 4.0.2-dfsg-1ubuntu1
* Merge from Debian unstable, remaining changes:
  - Add Apport hook.
    - debian/virtualbox-ose.files/source_virtualbox-ose.py
    - debian/virtualbox-ose.install
  - Drop *-source packages.
* Drop ubuntu-01-fix-build-gcc45.patch, fixed upstream.
* Drop ubuntu-02-as-needed.patch, added to the Debian package.

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src/VBox/VMM/VMMGC/CPUMGC.cpp
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/* $Id: CPUMGC.cpp $ */
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/** @file
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 * CPUM - Guest Context Code.
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 */
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/*
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 * Copyright (C) 2006-2007 Oracle Corporation
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 *
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 * This file is part of VirtualBox Open Source Edition (OSE), as
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 * available from http://www.virtualbox.org. This file is free software;
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 * you can redistribute it and/or modify it under the terms of the GNU
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 * General Public License (GPL) as published by the Free Software
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 * Foundation, in version 2 as it comes in the "COPYING" file of the
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 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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 */
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/*******************************************************************************
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*   Header Files                                                               *
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*******************************************************************************/
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#define LOG_GROUP LOG_GROUP_CPUM
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#include <VBox/cpum.h>
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#include <VBox/vmm.h>
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#include <VBox/trpm.h>
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#include "CPUMInternal.h"
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#include <VBox/vm.h>
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#include <VBox/err.h>
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#include <iprt/assert.h>
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#include <VBox/log.h>
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/*******************************************************************************
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*   Internal Functions                                                         *
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*******************************************************************************/
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RT_C_DECLS_BEGIN /* addressed from asm (not called so no DECLASM). */
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DECLCALLBACK(int) cpumGCHandleNPAndGP(PVM pVM, PCPUMCTXCORE pRegFrame, uintptr_t uUser);
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RT_C_DECLS_END
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/**
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 * Deal with traps occuring during segment loading and IRET
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 * when resuming guest context.
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 *
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 * @returns VBox status code.
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 * @param   pVM         The VM handle.
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 * @param   pRegFrame   The register frame.
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 * @param   uUser       User argument. In this case a combination of the
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 *                      CPUM_HANDLER_* \#defines.
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 */
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DECLCALLBACK(int) cpumGCHandleNPAndGP(PVM pVM, PCPUMCTXCORE pRegFrame, uintptr_t uUser)
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{
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    Log(("********************************************************\n"));
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    Log(("cpumGCHandleNPAndGP: eip=%RX32 uUser=%#x\n", pRegFrame->eip, uUser));
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    Log(("********************************************************\n"));
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    PVMCPU pVCpu = VMMGetCpu0(pVM);
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    /*
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     * Update the guest cpu state.
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     */
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    if (uUser & CPUM_HANDLER_CTXCORE_IN_EBP)
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    {
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        PCPUMCTXCORE  pGstCtxCore = (PCPUMCTXCORE)CPUMGetGuestCtxCore(pVCpu);
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        PCCPUMCTXCORE pGstCtxCoreSrc = (PCPUMCTXCORE)pRegFrame->ebp;
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        *pGstCtxCore = *pGstCtxCoreSrc;
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    }
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    /*
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     * Take action based on what's happended.
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     */
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    switch (uUser & CPUM_HANDLER_TYPEMASK)
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    {
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        case CPUM_HANDLER_GS:
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        //    if (!pVM->cpum.s.Guest.ldtr)
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        //    {
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        //        pRegFrame->gs = 0;
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        //        pRegFrame->eip += 6; /* mov gs, [edx + CPUM.Guest.gs] */
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        //        return VINF_SUCCESS;
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        //    }
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        case CPUM_HANDLER_DS:
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        case CPUM_HANDLER_ES:
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        case CPUM_HANDLER_FS:
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            TRPMGCHyperReturnToHost(pVM, VINF_EM_RAW_STALE_SELECTOR);
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            break;
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        /* Make sure we restore the guest context from the interrupt stack frame. */
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        case CPUM_HANDLER_IRET:
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        {
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            PCPUMCTXCORE  pGstCtxCore = (PCPUMCTXCORE)CPUMGetGuestCtxCore(pVCpu);
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            uint32_t     *pEsp = (uint32_t *)pRegFrame->esp;
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            /* Sync general purpose registers */
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            *pGstCtxCore = *pRegFrame;
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            pGstCtxCore->eip        = *pEsp++;
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            pGstCtxCore->cs         = (RTSEL)*pEsp++;
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            pGstCtxCore->eflags.u32 = *pEsp++;
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            pGstCtxCore->esp        = *pEsp++;
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            pGstCtxCore->ss         = (RTSEL)*pEsp++;
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            if (pGstCtxCore->eflags.Bits.u1VM)
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            {
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                pGstCtxCore->es     = (RTSEL)*pEsp++;
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                pGstCtxCore->ds     = (RTSEL)*pEsp++;
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                pGstCtxCore->fs     = (RTSEL)*pEsp++;
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                pGstCtxCore->gs     = (RTSEL)*pEsp++;
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            }
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            TRPMGCHyperReturnToHost(pVM, VINF_EM_RAW_IRET_TRAP);
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            break;
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        }
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    }
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    return VERR_TRPM_DONT_PANIC;
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}
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