| 1 | /* $Id: CPUMRC.cpp 35346 2010-12-27 16:13:13Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * CPUM - Guest Context Code.
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2006-2007 Oracle Corporation
|
|---|
| 8 | *
|
|---|
| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 10 | * available from http://www.virtualbox.org. This file is free software;
|
|---|
| 11 | * you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 12 | * General Public License (GPL) as published by the Free Software
|
|---|
| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
|
|---|
| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
|
|---|
| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 16 | */
|
|---|
| 17 |
|
|---|
| 18 |
|
|---|
| 19 | /*******************************************************************************
|
|---|
| 20 | * Header Files *
|
|---|
| 21 | *******************************************************************************/
|
|---|
| 22 | #define LOG_GROUP LOG_GROUP_CPUM
|
|---|
| 23 | #include <VBox/vmm/cpum.h>
|
|---|
| 24 | #include <VBox/vmm/vmm.h>
|
|---|
| 25 | #include <VBox/vmm/trpm.h>
|
|---|
| 26 | #include "CPUMInternal.h"
|
|---|
| 27 | #include <VBox/vmm/vm.h>
|
|---|
| 28 | #include <VBox/err.h>
|
|---|
| 29 | #include <iprt/assert.h>
|
|---|
| 30 | #include <VBox/log.h>
|
|---|
| 31 |
|
|---|
| 32 |
|
|---|
| 33 | /*******************************************************************************
|
|---|
| 34 | * Internal Functions *
|
|---|
| 35 | *******************************************************************************/
|
|---|
| 36 | RT_C_DECLS_BEGIN /* addressed from asm (not called so no DECLASM). */
|
|---|
| 37 | DECLCALLBACK(int) cpumGCHandleNPAndGP(PVM pVM, PCPUMCTXCORE pRegFrame, uintptr_t uUser);
|
|---|
| 38 | RT_C_DECLS_END
|
|---|
| 39 |
|
|---|
| 40 |
|
|---|
| 41 | /**
|
|---|
| 42 | * Deal with traps occurring during segment loading and IRET
|
|---|
| 43 | * when resuming guest context.
|
|---|
| 44 | *
|
|---|
| 45 | * @returns VBox status code.
|
|---|
| 46 | * @param pVM The VM handle.
|
|---|
| 47 | * @param pRegFrame The register frame.
|
|---|
| 48 | * @param uUser User argument. In this case a combination of the
|
|---|
| 49 | * CPUM_HANDLER_* \#defines.
|
|---|
| 50 | */
|
|---|
| 51 | DECLCALLBACK(int) cpumGCHandleNPAndGP(PVM pVM, PCPUMCTXCORE pRegFrame, uintptr_t uUser)
|
|---|
| 52 | {
|
|---|
| 53 | Log(("********************************************************\n"));
|
|---|
| 54 | Log(("cpumGCHandleNPAndGP: eip=%RX32 uUser=%#x\n", pRegFrame->eip, uUser));
|
|---|
| 55 | Log(("********************************************************\n"));
|
|---|
| 56 |
|
|---|
| 57 | PVMCPU pVCpu = VMMGetCpu0(pVM);
|
|---|
| 58 |
|
|---|
| 59 | /*
|
|---|
| 60 | * Update the guest cpu state.
|
|---|
| 61 | */
|
|---|
| 62 | if (uUser & CPUM_HANDLER_CTXCORE_IN_EBP)
|
|---|
| 63 | {
|
|---|
| 64 | PCPUMCTXCORE pGstCtxCore = (PCPUMCTXCORE)CPUMGetGuestCtxCore(pVCpu);
|
|---|
| 65 | PCCPUMCTXCORE pGstCtxCoreSrc = (PCPUMCTXCORE)pRegFrame->ebp;
|
|---|
| 66 | *pGstCtxCore = *pGstCtxCoreSrc;
|
|---|
| 67 | }
|
|---|
| 68 |
|
|---|
| 69 | /*
|
|---|
| 70 | * Take action based on what's happened.
|
|---|
| 71 | */
|
|---|
| 72 | switch (uUser & CPUM_HANDLER_TYPEMASK)
|
|---|
| 73 | {
|
|---|
| 74 | case CPUM_HANDLER_GS:
|
|---|
| 75 | // if (!pVM->cpum.s.Guest.ldtr)
|
|---|
| 76 | // {
|
|---|
| 77 | // pRegFrame->gs = 0;
|
|---|
| 78 | // pRegFrame->eip += 6; /* mov gs, [edx + CPUM.Guest.gs] */
|
|---|
| 79 | // return VINF_SUCCESS;
|
|---|
| 80 | // }
|
|---|
| 81 | case CPUM_HANDLER_DS:
|
|---|
| 82 | case CPUM_HANDLER_ES:
|
|---|
| 83 | case CPUM_HANDLER_FS:
|
|---|
| 84 | TRPMGCHyperReturnToHost(pVM, VINF_EM_RAW_STALE_SELECTOR);
|
|---|
| 85 | break;
|
|---|
| 86 |
|
|---|
| 87 | /* Make sure we restore the guest context from the interrupt stack frame. */
|
|---|
| 88 | case CPUM_HANDLER_IRET:
|
|---|
| 89 | {
|
|---|
| 90 | PCPUMCTXCORE pGstCtxCore = (PCPUMCTXCORE)CPUMGetGuestCtxCore(pVCpu);
|
|---|
| 91 | uint32_t *pEsp = (uint32_t *)pRegFrame->esp;
|
|---|
| 92 |
|
|---|
| 93 | /* Sync general purpose registers */
|
|---|
| 94 | *pGstCtxCore = *pRegFrame;
|
|---|
| 95 |
|
|---|
| 96 | pGstCtxCore->eip = *pEsp++;
|
|---|
| 97 | pGstCtxCore->cs = (RTSEL)*pEsp++;
|
|---|
| 98 | pGstCtxCore->eflags.u32 = *pEsp++;
|
|---|
| 99 | pGstCtxCore->esp = *pEsp++;
|
|---|
| 100 | pGstCtxCore->ss = (RTSEL)*pEsp++;
|
|---|
| 101 | if (pGstCtxCore->eflags.Bits.u1VM)
|
|---|
| 102 | {
|
|---|
| 103 | pGstCtxCore->es = (RTSEL)*pEsp++;
|
|---|
| 104 | pGstCtxCore->ds = (RTSEL)*pEsp++;
|
|---|
| 105 | pGstCtxCore->fs = (RTSEL)*pEsp++;
|
|---|
| 106 | pGstCtxCore->gs = (RTSEL)*pEsp++;
|
|---|
| 107 | }
|
|---|
| 108 |
|
|---|
| 109 | TRPMGCHyperReturnToHost(pVM, VINF_EM_RAW_IRET_TRAP);
|
|---|
| 110 | break;
|
|---|
| 111 | }
|
|---|
| 112 | }
|
|---|
| 113 | return VERR_TRPM_DONT_PANIC;
|
|---|
| 114 | }
|
|---|
| 115 |
|
|---|
