| 1 | /* $Id: PATMSSM.cpp 35346 2010-12-27 16:13:13Z vboxsync $ */
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| 2 | /** @file
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| 3 | * PATMSSM - Dynamic Guest OS Patching Manager; Save and load state
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| 4 | *
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| 5 | * NOTE: CSAM assumes patch memory is never reused!!
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| 6 | */
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| 7 |
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| 8 | /*
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| 9 | * Copyright (C) 2006-2007 Oracle Corporation
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| 10 | *
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| 11 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 12 | * available from http://www.virtualbox.org. This file is free software;
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| 13 | * you can redistribute it and/or modify it under the terms of the GNU
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| 14 | * General Public License (GPL) as published by the Free Software
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| 15 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 16 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 17 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 18 | */
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| 19 |
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| 20 | /*******************************************************************************
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| 21 | * Header Files *
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| 22 | *******************************************************************************/
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| 23 | #define LOG_GROUP LOG_GROUP_PATM
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| 24 | #include <VBox/vmm/patm.h>
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| 25 | #include <VBox/vmm/cpum.h>
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| 26 | #include <VBox/vmm/mm.h>
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| 27 | #include <VBox/vmm/ssm.h>
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| 28 | #include <VBox/param.h>
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| 29 | #include <iprt/avl.h>
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| 30 | #include "PATMInternal.h"
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| 31 | #include "PATMPatch.h"
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| 32 | #include "PATMA.h"
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| 33 | #include <VBox/vmm/vm.h>
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| 34 | #include <VBox/vmm/csam.h>
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| 35 | #include "internal/pgm.h"
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| 36 | #include <VBox/dbg.h>
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| 37 | #include <VBox/err.h>
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| 38 | #include <VBox/log.h>
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| 39 | #include <iprt/assert.h>
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| 40 | #include <iprt/asm.h>
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| 41 | #include <iprt/string.h>
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| 42 | #include <VBox/dis.h>
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| 43 | #include <VBox/disopcode.h>
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| 44 |
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| 45 | /*******************************************************************************
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| 46 | * Defined Constants And Macros *
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| 47 | *******************************************************************************/
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| 48 | #define PATM_SUBTRACT_PTR(a, b) *(uintptr_t *)&(a) = (uintptr_t)(a) - (uintptr_t)(b)
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| 49 | #define PATM_ADD_PTR(a, b) *(uintptr_t *)&(a) = (uintptr_t)(a) + (uintptr_t)(b)
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| 50 |
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| 51 | /*******************************************************************************
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| 52 | * Internal Functions *
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| 53 | *******************************************************************************/
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| 54 | static void patmCorrectFixup(PVM pVM, unsigned ulSSMVersion, PATM &patmInfo, PPATCHINFO pPatch, PRELOCREC pRec, int32_t offset, RTRCPTR *pFixup);
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| 55 |
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| 56 | /*******************************************************************************
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| 57 | * Global Variables *
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| 58 | *******************************************************************************/
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| 59 | /**
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| 60 | * SSM descriptor table for the PATM structure.
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| 61 | */
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| 62 | static SSMFIELD const g_aPatmFields[] =
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| 63 | {
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| 64 | /** @todo there are a bunch more fields here which can be marked as ignored. */
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| 65 | SSMFIELD_ENTRY_IGNORE( PATM, offVM),
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| 66 | SSMFIELD_ENTRY_RCPTR( PATM, pPatchMemGC),
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| 67 | SSMFIELD_ENTRY_IGN_HCPTR( PATM, pPatchMemHC),
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| 68 | SSMFIELD_ENTRY( PATM, cbPatchMem),
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| 69 | SSMFIELD_ENTRY( PATM, offPatchMem),
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| 70 | SSMFIELD_ENTRY( PATM, fOutOfMemory),
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| 71 | SSMFIELD_ENTRY_PAD_HC_AUTO( 3, 3),
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| 72 | SSMFIELD_ENTRY( PATM, deltaReloc),
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| 73 | SSMFIELD_ENTRY_IGN_HCPTR( PATM, pGCStateHC),
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| 74 | SSMFIELD_ENTRY_RCPTR( PATM, pGCStateGC),
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| 75 | SSMFIELD_ENTRY_RCPTR( PATM, pGCStackGC),
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| 76 | SSMFIELD_ENTRY_IGN_HCPTR( PATM, pGCStackHC),
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| 77 | SSMFIELD_ENTRY_RCPTR( PATM, pCPUMCtxGC),
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| 78 | SSMFIELD_ENTRY_RCPTR( PATM, pStatsGC),
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| 79 | SSMFIELD_ENTRY_IGN_HCPTR( PATM, pStatsHC),
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| 80 | SSMFIELD_ENTRY( PATM, uCurrentPatchIdx),
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| 81 | SSMFIELD_ENTRY( PATM, ulCallDepth),
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| 82 | SSMFIELD_ENTRY( PATM, cPageRecords),
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| 83 | SSMFIELD_ENTRY_RCPTR( PATM, pPatchedInstrGCLowest),
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| 84 | SSMFIELD_ENTRY_RCPTR( PATM, pPatchedInstrGCHighest),
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| 85 | SSMFIELD_ENTRY_RCPTR( PATM, PatchLookupTreeGC),
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| 86 | SSMFIELD_ENTRY_IGN_HCPTR( PATM, PatchLookupTreeHC),
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| 87 | SSMFIELD_ENTRY_RCPTR( PATM, pfnHelperCallGC),
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| 88 | SSMFIELD_ENTRY_RCPTR( PATM, pfnHelperRetGC),
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| 89 | SSMFIELD_ENTRY_RCPTR( PATM, pfnHelperJumpGC),
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| 90 | SSMFIELD_ENTRY_RCPTR( PATM, pfnHelperIretGC),
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| 91 | SSMFIELD_ENTRY_IGN_HCPTR( PATM, pGlobalPatchRec),
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| 92 | SSMFIELD_ENTRY_RCPTR( PATM, pfnSysEnterGC),
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| 93 | SSMFIELD_ENTRY_RCPTR( PATM, pfnSysEnterPatchGC),
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| 94 | SSMFIELD_ENTRY( PATM, uSysEnterPatchIdx),
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| 95 | SSMFIELD_ENTRY_RCPTR( PATM, pvFaultMonitor),
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| 96 | SSMFIELD_ENTRY_GCPHYS( PATM, mmio.GCPhys),
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| 97 | SSMFIELD_ENTRY_RCPTR( PATM, mmio.pCachedData),
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| 98 | SSMFIELD_ENTRY_IGN_RCPTR( PATM, mmio.Alignment0),
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| 99 | SSMFIELD_ENTRY_IGN_HCPTR( PATM, savedstate.pSSM),
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| 100 | SSMFIELD_ENTRY( PATM, savedstate.cPatches),
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| 101 | SSMFIELD_ENTRY_PAD_HC64( PATM, savedstate.Alignment0, sizeof(uint32_t)),
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| 102 | SSMFIELD_ENTRY_IGNORE( PATM, StatNrOpcodeRead),
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| 103 | SSMFIELD_ENTRY_IGNORE( PATM, StatDisabled),
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| 104 | SSMFIELD_ENTRY_IGNORE( PATM, StatUnusable),
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| 105 | SSMFIELD_ENTRY_IGNORE( PATM, StatEnabled),
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| 106 | SSMFIELD_ENTRY_IGNORE( PATM, StatInstalled),
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| 107 | SSMFIELD_ENTRY_IGNORE( PATM, StatInstalledFunctionPatches),
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| 108 | SSMFIELD_ENTRY_IGNORE( PATM, StatInstalledTrampoline),
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| 109 | SSMFIELD_ENTRY_IGNORE( PATM, StatInstalledJump),
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| 110 | SSMFIELD_ENTRY_IGNORE( PATM, StatInt3Callable),
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| 111 | SSMFIELD_ENTRY_IGNORE( PATM, StatInt3BlockRun),
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| 112 | SSMFIELD_ENTRY_IGNORE( PATM, StatOverwritten),
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| 113 | SSMFIELD_ENTRY_IGNORE( PATM, StatFixedConflicts),
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| 114 | SSMFIELD_ENTRY_IGNORE( PATM, StatFlushed),
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| 115 | SSMFIELD_ENTRY_IGNORE( PATM, StatPageBoundaryCrossed),
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| 116 | SSMFIELD_ENTRY_IGNORE( PATM, StatMonitored),
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| 117 | SSMFIELD_ENTRY_IGNORE( PATM, StatHandleTrap),
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| 118 | SSMFIELD_ENTRY_IGNORE( PATM, StatSwitchBack),
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| 119 | SSMFIELD_ENTRY_IGNORE( PATM, StatSwitchBackFail),
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| 120 | SSMFIELD_ENTRY_IGNORE( PATM, StatPATMMemoryUsed),
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| 121 | SSMFIELD_ENTRY_IGNORE( PATM, StatDuplicateREQSuccess),
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| 122 | SSMFIELD_ENTRY_IGNORE( PATM, StatDuplicateREQFailed),
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| 123 | SSMFIELD_ENTRY_IGNORE( PATM, StatDuplicateUseExisting),
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| 124 | SSMFIELD_ENTRY_IGNORE( PATM, StatFunctionFound),
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| 125 | SSMFIELD_ENTRY_IGNORE( PATM, StatFunctionNotFound),
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| 126 | SSMFIELD_ENTRY_IGNORE( PATM, StatPatchWrite),
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| 127 | SSMFIELD_ENTRY_IGNORE( PATM, StatPatchWriteDetect),
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| 128 | SSMFIELD_ENTRY_IGNORE( PATM, StatDirty),
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| 129 | SSMFIELD_ENTRY_IGNORE( PATM, StatPushTrap),
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| 130 | SSMFIELD_ENTRY_IGNORE( PATM, StatPatchWriteInterpreted),
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| 131 | SSMFIELD_ENTRY_IGNORE( PATM, StatPatchWriteInterpretedFailed),
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| 132 | SSMFIELD_ENTRY_IGNORE( PATM, StatSysEnter),
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| 133 | SSMFIELD_ENTRY_IGNORE( PATM, StatSysExit),
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| 134 | SSMFIELD_ENTRY_IGNORE( PATM, StatEmulIret),
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| 135 | SSMFIELD_ENTRY_IGNORE( PATM, StatEmulIretFailed),
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| 136 | SSMFIELD_ENTRY_IGNORE( PATM, StatInstrDirty),
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| 137 | SSMFIELD_ENTRY_IGNORE( PATM, StatInstrDirtyGood),
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| 138 | SSMFIELD_ENTRY_IGNORE( PATM, StatInstrDirtyBad),
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| 139 | SSMFIELD_ENTRY_IGNORE( PATM, StatPatchPageInserted),
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| 140 | SSMFIELD_ENTRY_IGNORE( PATM, StatPatchPageRemoved),
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| 141 | SSMFIELD_ENTRY_IGNORE( PATM, StatPatchRefreshSuccess),
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| 142 | SSMFIELD_ENTRY_IGNORE( PATM, StatPatchRefreshFailed),
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| 143 | SSMFIELD_ENTRY_IGNORE( PATM, StatGenRet),
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| 144 | SSMFIELD_ENTRY_IGNORE( PATM, StatGenRetReused),
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| 145 | SSMFIELD_ENTRY_IGNORE( PATM, StatGenJump),
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| 146 | SSMFIELD_ENTRY_IGNORE( PATM, StatGenCall),
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| 147 | SSMFIELD_ENTRY_IGNORE( PATM, StatGenPopf),
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| 148 | SSMFIELD_ENTRY_IGNORE( PATM, StatCheckPendingIRQ),
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| 149 | SSMFIELD_ENTRY_IGNORE( PATM, StatFunctionLookupReplace),
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| 150 | SSMFIELD_ENTRY_IGNORE( PATM, StatFunctionLookupInsert),
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| 151 | SSMFIELD_ENTRY_IGNORE( PATM, StatU32FunctionMaxSlotsUsed),
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| 152 | SSMFIELD_ENTRY_IGNORE( PATM, Alignment0),
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| 153 | SSMFIELD_ENTRY_TERM()
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| 154 | };
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| 155 |
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| 156 | /**
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| 157 | * SSM descriptor table for the PATMGCSTATE structure.
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| 158 | */
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| 159 | static SSMFIELD const g_aPatmGCStateFields[] =
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| 160 | {
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| 161 | SSMFIELD_ENTRY( PATMGCSTATE, uVMFlags),
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| 162 | SSMFIELD_ENTRY( PATMGCSTATE, uPendingAction),
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| 163 | SSMFIELD_ENTRY( PATMGCSTATE, uPatchCalls),
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| 164 | SSMFIELD_ENTRY( PATMGCSTATE, uScratch),
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| 165 | SSMFIELD_ENTRY( PATMGCSTATE, uIretEFlags),
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| 166 | SSMFIELD_ENTRY( PATMGCSTATE, uIretCS),
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| 167 | SSMFIELD_ENTRY( PATMGCSTATE, uIretEIP),
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| 168 | SSMFIELD_ENTRY( PATMGCSTATE, Psp),
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| 169 | SSMFIELD_ENTRY( PATMGCSTATE, fPIF),
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| 170 | SSMFIELD_ENTRY_RCPTR( PATMGCSTATE, GCPtrInhibitInterrupts),
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| 171 | SSMFIELD_ENTRY_RCPTR( PATMGCSTATE, GCCallPatchTargetAddr),
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| 172 | SSMFIELD_ENTRY_RCPTR( PATMGCSTATE, GCCallReturnAddr),
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| 173 | SSMFIELD_ENTRY( PATMGCSTATE, Restore.uEAX),
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| 174 | SSMFIELD_ENTRY( PATMGCSTATE, Restore.uECX),
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| 175 | SSMFIELD_ENTRY( PATMGCSTATE, Restore.uEDI),
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| 176 | SSMFIELD_ENTRY( PATMGCSTATE, Restore.eFlags),
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| 177 | SSMFIELD_ENTRY( PATMGCSTATE, Restore.uFlags),
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| 178 | SSMFIELD_ENTRY_TERM()
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| 179 | };
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| 180 |
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| 181 | /**
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| 182 | * SSM descriptor table for the PATMPATCHREC structure.
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| 183 | */
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| 184 | static SSMFIELD const g_aPatmPatchRecFields[] =
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| 185 | {
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| 186 | SSMFIELD_ENTRY( PATMPATCHREC, Core.Key),
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| 187 | SSMFIELD_ENTRY_IGNORE( PATMPATCHREC, Core.pLeft),
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| 188 | SSMFIELD_ENTRY_IGNORE( PATMPATCHREC, Core.pRight),
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| 189 | SSMFIELD_ENTRY_IGNORE( PATMPATCHREC, Core.uchHeight),
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| 190 | SSMFIELD_ENTRY_PAD_HC_AUTO( 3, 3),
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| 191 | SSMFIELD_ENTRY( PATMPATCHREC, CoreOffset.Key),
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| 192 | SSMFIELD_ENTRY_IGNORE( PATMPATCHREC, CoreOffset.pLeft),
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| 193 | SSMFIELD_ENTRY_IGNORE( PATMPATCHREC, CoreOffset.pRight),
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| 194 | SSMFIELD_ENTRY_IGNORE( PATMPATCHREC, CoreOffset.uchHeight),
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| 195 | SSMFIELD_ENTRY_PAD_HC_AUTO( 3, 3),
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| 196 | SSMFIELD_ENTRY( PATMPATCHREC, patch.uState),
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| 197 | SSMFIELD_ENTRY( PATMPATCHREC, patch.uOldState),
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| 198 | SSMFIELD_ENTRY( PATMPATCHREC, patch.uOpMode),
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| 199 | SSMFIELD_ENTRY_RCPTR( PATMPATCHREC, patch.pPrivInstrGC),
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| 200 | SSMFIELD_ENTRY_IGN_HCPTR( PATMPATCHREC, patch.unusedHC),
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| 201 | SSMFIELD_ENTRY( PATMPATCHREC, patch.aPrivInstr),
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| 202 | SSMFIELD_ENTRY( PATMPATCHREC, patch.cbPrivInstr),
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| 203 | SSMFIELD_ENTRY( PATMPATCHREC, patch.opcode),
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| 204 | SSMFIELD_ENTRY( PATMPATCHREC, patch.cbPatchJump),
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| 205 | SSMFIELD_ENTRY_RCPTR( PATMPATCHREC, patch.pPatchJumpDestGC),
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| 206 | SSMFIELD_ENTRY( PATMPATCHREC, patch.pPatchBlockOffset),
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| 207 | SSMFIELD_ENTRY( PATMPATCHREC, patch.cbPatchBlockSize),
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| 208 | SSMFIELD_ENTRY( PATMPATCHREC, patch.uCurPatchOffset),
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| 209 | SSMFIELD_ENTRY_PAD_HC64( PATMPATCHREC, patch.Alignment0, sizeof(uint32_t)),
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| 210 | SSMFIELD_ENTRY( PATMPATCHREC, patch.flags),
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| 211 | SSMFIELD_ENTRY_RCPTR( PATMPATCHREC, patch.pInstrGCLowest),
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| 212 | SSMFIELD_ENTRY_RCPTR( PATMPATCHREC, patch.pInstrGCHighest),
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| 213 | SSMFIELD_ENTRY_IGN_HCPTR( PATMPATCHREC, patch.FixupTree),
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| 214 | SSMFIELD_ENTRY( PATMPATCHREC, patch.nrFixups),
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| 215 | SSMFIELD_ENTRY( PATMPATCHREC, patch.nrJumpRecs), // should be zero?
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| 216 | SSMFIELD_ENTRY_IGN_HCPTR( PATMPATCHREC, patch.JumpTree),
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| 217 | SSMFIELD_ENTRY_IGN_HCPTR( PATMPATCHREC, patch.Patch2GuestAddrTree),
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| 218 | SSMFIELD_ENTRY_IGN_HCPTR( PATMPATCHREC, patch.Guest2PatchAddrTree),
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| 219 | SSMFIELD_ENTRY( PATMPATCHREC, patch.nrPatch2GuestRecs),
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| 220 | SSMFIELD_ENTRY_PAD_HC64( PATMPATCHREC, patch.Alignment1, sizeof(uint32_t)),
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| 221 | SSMFIELD_ENTRY_IGN_HCPTR( PATMPATCHREC, patch.unused.pPatchLocStartHC), // saved as zero
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| 222 | SSMFIELD_ENTRY_IGN_HCPTR( PATMPATCHREC, patch.unused.pPatchLocEndHC), // ditto
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| 223 | SSMFIELD_ENTRY_IGN_RCPTR( PATMPATCHREC, patch.unused.pGuestLoc), // ditto
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| 224 | SSMFIELD_ENTRY_IGNORE( PATMPATCHREC, patch.unused.opsize), // ditto
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| 225 | SSMFIELD_ENTRY_IGN_HCPTR( PATMPATCHREC, patch.pTempInfo),
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| 226 | SSMFIELD_ENTRY( PATMPATCHREC, patch.cCodeWrites),
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| 227 | SSMFIELD_ENTRY( PATMPATCHREC, patch.cTraps),
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| 228 | SSMFIELD_ENTRY( PATMPATCHREC, patch.cInvalidWrites),
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| 229 | SSMFIELD_ENTRY( PATMPATCHREC, patch.uPatchIdx),
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| 230 | SSMFIELD_ENTRY( PATMPATCHREC, patch.bDirtyOpcode),
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| 231 | SSMFIELD_ENTRY_IGNORE( PATMPATCHREC, patch.Alignment2),
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| 232 | SSMFIELD_ENTRY_TERM()
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| 233 | };
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| 234 |
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| 235 | /**
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| 236 | * SSM descriptor table for the RELOCREC structure.
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| 237 | */
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| 238 | static SSMFIELD const g_aPatmRelocRec[] =
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| 239 | {
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| 240 | SSMFIELD_ENTRY_HCPTR_HACK_U32( RELOCREC, Core.Key), // Used to store the relocation type
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| 241 | SSMFIELD_ENTRY_IGN_HCPTR( RELOCREC, Core.pLeft),
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| 242 | SSMFIELD_ENTRY_IGN_HCPTR( RELOCREC, Core.pRight),
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| 243 | SSMFIELD_ENTRY_IGNORE( RELOCREC, Core.uchHeight),
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| 244 | SSMFIELD_ENTRY_PAD_HC_AUTO( 3, 7),
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| 245 | SSMFIELD_ENTRY( RELOCREC, uType),
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| 246 | SSMFIELD_ENTRY_PAD_HC_AUTO( 0, 4),
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| 247 | SSMFIELD_ENTRY_HCPTR_HACK_U32( RELOCREC, pRelocPos), // converted to a patch member offset.
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| 248 | SSMFIELD_ENTRY_RCPTR( RELOCREC, pSource),
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| 249 | SSMFIELD_ENTRY_RCPTR( RELOCREC, pDest),
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| 250 | SSMFIELD_ENTRY_TERM()
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| 251 | };
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| 252 |
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| 253 | /**
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| 254 | * SSM descriptor table for the RECPATCHTOGUEST structure.
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| 255 | */
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| 256 | static SSMFIELD const g_aPatmRecPatchToGuest[] =
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| 257 | {
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| 258 | SSMFIELD_ENTRY( RECPATCHTOGUEST, Core.Key),
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| 259 | SSMFIELD_ENTRY_PAD_HC_AUTO( 0, 4),
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| 260 | SSMFIELD_ENTRY_IGN_HCPTR( RECPATCHTOGUEST, Core.pLeft),
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| 261 | SSMFIELD_ENTRY_IGN_HCPTR( RECPATCHTOGUEST, Core.pRight),
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| 262 | SSMFIELD_ENTRY_IGNORE( RECPATCHTOGUEST, Core.uchHeight),
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| 263 | SSMFIELD_ENTRY_PAD_HC_AUTO( 3, 7),
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| 264 | SSMFIELD_ENTRY_RCPTR( RECPATCHTOGUEST, pOrgInstrGC),
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| 265 | SSMFIELD_ENTRY( RECPATCHTOGUEST, enmType),
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| 266 | SSMFIELD_ENTRY( RECPATCHTOGUEST, fDirty),
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| 267 | SSMFIELD_ENTRY( RECPATCHTOGUEST, fJumpTarget),
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| 268 | SSMFIELD_ENTRY( RECPATCHTOGUEST, u8DirtyOpcode),
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| 269 | SSMFIELD_ENTRY_PAD_HC_AUTO( 1, 5),
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| 270 | SSMFIELD_ENTRY_TERM()
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| 271 | };
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| 272 |
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| 273 |
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| 274 | #ifdef VBOX_STRICT
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| 275 | /**
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| 276 | * Callback function for RTAvlPVDoWithAll
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| 277 | *
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| 278 | * Counts the number of patches in the tree
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| 279 | *
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| 280 | * @returns VBox status code.
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| 281 | * @param pNode Current node
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| 282 | * @param pcPatches Pointer to patch counter (uint32_t)
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| 283 | */
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| 284 | static DECLCALLBACK(int) patmCountLeafPV(PAVLPVNODECORE pNode, void *pcPatches)
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| 285 | {
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| 286 | *(uint32_t *)pcPatches = *(uint32_t *)pcPatches + 1;
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| 287 | return VINF_SUCCESS;
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| 288 | }
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| 289 |
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| 290 | /**
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| 291 | * Callback function for RTAvlU32DoWithAll
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| 292 | *
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| 293 | * Counts the number of patches in the tree
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| 294 | *
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| 295 | * @returns VBox status code.
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| 296 | * @param pNode Current node
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| 297 | * @param pcPatches Pointer to patch counter (uint32_t)
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| 298 | */
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| 299 | static DECLCALLBACK(int) patmCountLeaf(PAVLU32NODECORE pNode, void *pcPatches)
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| 300 | {
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| 301 | *(uint32_t *)pcPatches = *(uint32_t *)pcPatches + 1;
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| 302 | return VINF_SUCCESS;
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| 303 | }
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| 304 | #endif /* VBOX_STRICT */
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| 305 |
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| 306 | /**
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| 307 | * Callback function for RTAvloU32DoWithAll
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| 308 | *
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| 309 | * Counts the number of patches in the tree
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| 310 | *
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| 311 | * @returns VBox status code.
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| 312 | * @param pNode Current node
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| 313 | * @param pcPatches Pointer to patch counter
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| 314 | */
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| 315 | static DECLCALLBACK(int) patmCountPatch(PAVLOU32NODECORE pNode, void *pcPatches)
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| 316 | {
|
|---|
| 317 | *(uint32_t *)pcPatches = *(uint32_t *)pcPatches + 1;
|
|---|
| 318 | return VINF_SUCCESS;
|
|---|
| 319 | }
|
|---|
| 320 |
|
|---|
| 321 | /**
|
|---|
| 322 | * Callback function for RTAvlU32DoWithAll
|
|---|
| 323 | *
|
|---|
| 324 | * Saves all patch to guest lookup records.
|
|---|
| 325 | *
|
|---|
| 326 | * @returns VBox status code.
|
|---|
| 327 | * @param pNode Current node
|
|---|
| 328 | * @param pVM1 VM Handle
|
|---|
| 329 | */
|
|---|
| 330 | static DECLCALLBACK(int) patmSaveP2GLookupRecords(PAVLU32NODECORE pNode, void *pVM1)
|
|---|
| 331 | {
|
|---|
| 332 | PVM pVM = (PVM)pVM1;
|
|---|
| 333 | PSSMHANDLE pSSM = pVM->patm.s.savedstate.pSSM;
|
|---|
| 334 | PRECPATCHTOGUEST pPatchToGuestRec = (PRECPATCHTOGUEST)pNode;
|
|---|
| 335 |
|
|---|
| 336 | /* Save the lookup record. */
|
|---|
| 337 | int rc = SSMR3PutMem(pSSM, pPatchToGuestRec, sizeof(RECPATCHTOGUEST));
|
|---|
| 338 | AssertRCReturn(rc, rc);
|
|---|
| 339 |
|
|---|
| 340 | return VINF_SUCCESS;
|
|---|
| 341 | }
|
|---|
| 342 |
|
|---|
| 343 | /**
|
|---|
| 344 | * Callback function for RTAvlPVDoWithAll
|
|---|
| 345 | *
|
|---|
| 346 | * Saves all patch to guest lookup records.
|
|---|
| 347 | *
|
|---|
| 348 | * @returns VBox status code.
|
|---|
| 349 | * @param pNode Current node
|
|---|
| 350 | * @param pVM1 VM Handle
|
|---|
| 351 | */
|
|---|
| 352 | static DECLCALLBACK(int) patmSaveFixupRecords(PAVLPVNODECORE pNode, void *pVM1)
|
|---|
| 353 | {
|
|---|
| 354 | PVM pVM = (PVM)pVM1;
|
|---|
| 355 | PSSMHANDLE pSSM = pVM->patm.s.savedstate.pSSM;
|
|---|
| 356 | RELOCREC rec = *(PRELOCREC)pNode;
|
|---|
| 357 | RTRCPTR *pFixup = (RTRCPTR *)rec.pRelocPos;
|
|---|
| 358 |
|
|---|
| 359 | Assert(rec.pRelocPos);
|
|---|
| 360 | /* Convert pointer to an offset into patch memory. */
|
|---|
| 361 | PATM_SUBTRACT_PTR(rec.pRelocPos, pVM->patm.s.pPatchMemHC);
|
|---|
| 362 |
|
|---|
| 363 | if (rec.uType == FIXUP_ABSOLUTE)
|
|---|
| 364 | {
|
|---|
| 365 | /* Core.Key abused to store the fixup type. */
|
|---|
| 366 | if (*pFixup == pVM->pVMRC + RT_OFFSETOF(VM, aCpus[0].fLocalForcedActions))
|
|---|
| 367 | rec.Core.Key = (AVLPVKEY)PATM_FIXUP_CPU_FF_ACTION;
|
|---|
| 368 | else
|
|---|
| 369 | if (*pFixup == CPUMR3GetGuestCpuIdDefRCPtr(pVM))
|
|---|
| 370 | rec.Core.Key = (AVLPVKEY)PATM_FIXUP_CPUID_DEFAULT;
|
|---|
| 371 | else
|
|---|
| 372 | if (*pFixup == CPUMR3GetGuestCpuIdStdRCPtr(pVM))
|
|---|
| 373 | rec.Core.Key = (AVLPVKEY)PATM_FIXUP_CPUID_STANDARD;
|
|---|
| 374 | else
|
|---|
| 375 | if (*pFixup == CPUMR3GetGuestCpuIdExtRCPtr(pVM))
|
|---|
| 376 | rec.Core.Key = (AVLPVKEY)PATM_FIXUP_CPUID_EXTENDED;
|
|---|
| 377 | else
|
|---|
| 378 | if (*pFixup == CPUMR3GetGuestCpuIdCentaurRCPtr(pVM))
|
|---|
| 379 | rec.Core.Key = (AVLPVKEY)PATM_FIXUP_CPUID_CENTAUR;
|
|---|
| 380 | }
|
|---|
| 381 |
|
|---|
| 382 | /* Save the lookup record. */
|
|---|
| 383 | int rc = SSMR3PutMem(pSSM, &rec, sizeof(rec));
|
|---|
| 384 | AssertRCReturn(rc, rc);
|
|---|
| 385 |
|
|---|
| 386 | return VINF_SUCCESS;
|
|---|
| 387 | }
|
|---|
| 388 |
|
|---|
| 389 |
|
|---|
| 390 | /**
|
|---|
| 391 | * Callback function for RTAvloU32DoWithAll
|
|---|
| 392 | *
|
|---|
| 393 | * Saves the state of the patch that's being enumerated
|
|---|
| 394 | *
|
|---|
| 395 | * @returns VBox status code.
|
|---|
| 396 | * @param pNode Current node
|
|---|
| 397 | * @param pVM1 VM Handle
|
|---|
| 398 | */
|
|---|
| 399 | static DECLCALLBACK(int) patmSavePatchState(PAVLOU32NODECORE pNode, void *pVM1)
|
|---|
| 400 | {
|
|---|
| 401 | PVM pVM = (PVM)pVM1;
|
|---|
| 402 | PPATMPATCHREC pPatch = (PPATMPATCHREC)pNode;
|
|---|
| 403 | PATMPATCHREC patch = *pPatch;
|
|---|
| 404 | PSSMHANDLE pSSM = pVM->patm.s.savedstate.pSSM;
|
|---|
| 405 | int rc;
|
|---|
| 406 |
|
|---|
| 407 | Assert(!(pPatch->patch.flags & PATMFL_GLOBAL_FUNCTIONS));
|
|---|
| 408 |
|
|---|
| 409 | /*
|
|---|
| 410 | * Reset HC pointers that need to be recalculated when loading the state
|
|---|
| 411 | */
|
|---|
| 412 | AssertMsg(patch.patch.uState == PATCH_REFUSED || (patch.patch.pPatchBlockOffset || (patch.patch.flags & (PATMFL_SYSENTER_XP|PATMFL_INT3_REPLACEMENT))),
|
|---|
| 413 | ("State = %x pPatchBlockHC=%08x flags=%x\n", patch.patch.uState, PATCHCODE_PTR_HC(&patch.patch), patch.patch.flags));
|
|---|
| 414 | Assert(pPatch->patch.JumpTree == 0);
|
|---|
| 415 | Assert(!pPatch->patch.pTempInfo || pPatch->patch.pTempInfo->DisasmJumpTree == 0);
|
|---|
| 416 | Assert(!pPatch->patch.pTempInfo || pPatch->patch.pTempInfo->IllegalInstrTree == 0);
|
|---|
| 417 |
|
|---|
| 418 | /* Save the patch record itself */
|
|---|
| 419 | rc = SSMR3PutMem(pSSM, &patch, sizeof(patch));
|
|---|
| 420 | AssertRCReturn(rc, rc);
|
|---|
| 421 |
|
|---|
| 422 | /*
|
|---|
| 423 | * Reset HC pointers in fixup records and save them.
|
|---|
| 424 | */
|
|---|
| 425 | #ifdef VBOX_STRICT
|
|---|
| 426 | uint32_t nrFixupRecs = 0;
|
|---|
| 427 | RTAvlPVDoWithAll(&pPatch->patch.FixupTree, true, patmCountLeafPV, &nrFixupRecs);
|
|---|
| 428 | AssertMsg(nrFixupRecs == pPatch->patch.nrFixups, ("Fixup inconsistency! counted %d vs %d\n", nrFixupRecs, pPatch->patch.nrFixups));
|
|---|
| 429 | #endif
|
|---|
| 430 | RTAvlPVDoWithAll(&pPatch->patch.FixupTree, true, patmSaveFixupRecords, pVM);
|
|---|
| 431 |
|
|---|
| 432 | #ifdef VBOX_STRICT
|
|---|
| 433 | uint32_t nrLookupRecords = 0;
|
|---|
| 434 | RTAvlU32DoWithAll(&pPatch->patch.Patch2GuestAddrTree, true, patmCountLeaf, &nrLookupRecords);
|
|---|
| 435 | Assert(nrLookupRecords == pPatch->patch.nrPatch2GuestRecs);
|
|---|
| 436 | #endif
|
|---|
| 437 |
|
|---|
| 438 | RTAvlU32DoWithAll(&pPatch->patch.Patch2GuestAddrTree, true, patmSaveP2GLookupRecords, pVM);
|
|---|
| 439 | return VINF_SUCCESS;
|
|---|
| 440 | }
|
|---|
| 441 |
|
|---|
| 442 | /**
|
|---|
| 443 | * Execute state save operation.
|
|---|
| 444 | *
|
|---|
| 445 | * @returns VBox status code.
|
|---|
| 446 | * @param pVM VM Handle.
|
|---|
| 447 | * @param pSSM SSM operation handle.
|
|---|
| 448 | */
|
|---|
| 449 | DECLCALLBACK(int) patmR3Save(PVM pVM, PSSMHANDLE pSSM)
|
|---|
| 450 | {
|
|---|
| 451 | PATM patmInfo = pVM->patm.s;
|
|---|
| 452 | int rc;
|
|---|
| 453 |
|
|---|
| 454 | pVM->patm.s.savedstate.pSSM = pSSM;
|
|---|
| 455 |
|
|---|
| 456 | /*
|
|---|
| 457 | * Reset HC pointers that need to be recalculated when loading the state
|
|---|
| 458 | */
|
|---|
| 459 | patmInfo.pPatchMemHC = NULL;
|
|---|
| 460 | patmInfo.pGCStateHC = 0;
|
|---|
| 461 | patmInfo.pvFaultMonitor = 0;
|
|---|
| 462 |
|
|---|
| 463 | Assert(patmInfo.ulCallDepth == 0);
|
|---|
| 464 |
|
|---|
| 465 | /*
|
|---|
| 466 | * Count the number of patches in the tree (feeling lazy)
|
|---|
| 467 | */
|
|---|
| 468 | patmInfo.savedstate.cPatches = 0;
|
|---|
| 469 | RTAvloU32DoWithAll(&pVM->patm.s.PatchLookupTreeHC->PatchTree, true, patmCountPatch, &patmInfo.savedstate.cPatches);
|
|---|
| 470 |
|
|---|
| 471 | /*
|
|---|
| 472 | * Save PATM structure
|
|---|
| 473 | */
|
|---|
| 474 | rc = SSMR3PutMem(pSSM, &patmInfo, sizeof(patmInfo));
|
|---|
| 475 | AssertRCReturn(rc, rc);
|
|---|
| 476 |
|
|---|
| 477 | /*
|
|---|
| 478 | * Save patch memory contents
|
|---|
| 479 | */
|
|---|
| 480 | rc = SSMR3PutMem(pSSM, pVM->patm.s.pPatchMemHC, pVM->patm.s.cbPatchMem);
|
|---|
| 481 | AssertRCReturn(rc, rc);
|
|---|
| 482 |
|
|---|
| 483 | /*
|
|---|
| 484 | * Save GC state memory
|
|---|
| 485 | */
|
|---|
| 486 | rc = SSMR3PutMem(pSSM, pVM->patm.s.pGCStateHC, sizeof(PATMGCSTATE));
|
|---|
| 487 | AssertRCReturn(rc, rc);
|
|---|
| 488 |
|
|---|
| 489 | /*
|
|---|
| 490 | * Save PATM stack page
|
|---|
| 491 | */
|
|---|
| 492 | rc = SSMR3PutMem(pSSM, pVM->patm.s.pGCStackHC, PATM_STACK_TOTAL_SIZE);
|
|---|
| 493 | AssertRCReturn(rc, rc);
|
|---|
| 494 |
|
|---|
| 495 | /*
|
|---|
| 496 | * Save all patches
|
|---|
| 497 | */
|
|---|
| 498 | rc = RTAvloU32DoWithAll(&pVM->patm.s.PatchLookupTreeHC->PatchTree, true, patmSavePatchState, pVM);
|
|---|
| 499 | AssertRCReturn(rc, rc);
|
|---|
| 500 |
|
|---|
| 501 | /** @note patch statistics are not saved. */
|
|---|
| 502 |
|
|---|
| 503 | return VINF_SUCCESS;
|
|---|
| 504 | }
|
|---|
| 505 |
|
|---|
| 506 | /**
|
|---|
| 507 | * Execute state load operation.
|
|---|
| 508 | *
|
|---|
| 509 | * @returns VBox status code.
|
|---|
| 510 | * @param pVM VM Handle.
|
|---|
| 511 | * @param pSSM SSM operation handle.
|
|---|
| 512 | * @param uVersion Data layout version.
|
|---|
| 513 | * @param uPass The data pass.
|
|---|
| 514 | */
|
|---|
| 515 | DECLCALLBACK(int) patmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass)
|
|---|
| 516 | {
|
|---|
| 517 | PATM patmInfo;
|
|---|
| 518 | int rc;
|
|---|
| 519 |
|
|---|
| 520 | if ( uVersion != PATM_SSM_VERSION
|
|---|
| 521 | && uVersion != PATM_SSM_VERSION_FIXUP_HACK
|
|---|
| 522 | && uVersion != PATM_SSM_VERSION_VER16
|
|---|
| 523 | )
|
|---|
| 524 | {
|
|---|
| 525 | AssertMsgFailed(("patmR3Load: Invalid version uVersion=%d!\n", uVersion));
|
|---|
| 526 | return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
|
|---|
| 527 | }
|
|---|
| 528 | Assert(uPass == SSM_PASS_FINAL); NOREF(uPass);
|
|---|
| 529 |
|
|---|
| 530 | pVM->patm.s.savedstate.pSSM = pSSM;
|
|---|
| 531 |
|
|---|
| 532 | /*
|
|---|
| 533 | * Restore PATM structure
|
|---|
| 534 | */
|
|---|
| 535 | RT_ZERO(patmInfo);
|
|---|
| 536 | rc = SSMR3GetStructEx(pSSM, &patmInfo, sizeof(patmInfo), SSMSTRUCT_FLAGS_MEM_BAND_AID, &g_aPatmFields[0], NULL);
|
|---|
| 537 | AssertRCReturn(rc, rc);
|
|---|
| 538 |
|
|---|
| 539 | /* Relative calls are made to the helper functions. Therefor their relative location must not change! */
|
|---|
| 540 | /* Note: we reuse the saved global helpers and assume they are identical, which is kind of dangerous. */
|
|---|
| 541 | if ( (pVM->patm.s.pfnHelperCallGC - pVM->patm.s.pPatchMemGC) != (patmInfo.pfnHelperCallGC - patmInfo.pPatchMemGC)
|
|---|
| 542 | || (pVM->patm.s.pfnHelperRetGC - pVM->patm.s.pPatchMemGC) != (patmInfo.pfnHelperRetGC - patmInfo.pPatchMemGC)
|
|---|
| 543 | || (pVM->patm.s.pfnHelperJumpGC - pVM->patm.s.pPatchMemGC) != (patmInfo.pfnHelperJumpGC - patmInfo.pPatchMemGC)
|
|---|
| 544 | || (pVM->patm.s.pfnHelperIretGC - pVM->patm.s.pPatchMemGC) != (patmInfo.pfnHelperIretGC - patmInfo.pPatchMemGC))
|
|---|
| 545 | {
|
|---|
| 546 | AssertMsgFailed(("Helper function ptrs don't match!!!\n"));
|
|---|
| 547 | return VERR_SSM_INVALID_STATE;
|
|---|
| 548 | }
|
|---|
| 549 |
|
|---|
| 550 | if (pVM->patm.s.cbPatchMem != patmInfo.cbPatchMem)
|
|---|
| 551 | {
|
|---|
| 552 | AssertMsgFailed(("Patch memory ptrs and/or sizes don't match!!!\n"));
|
|---|
| 553 | return VERR_SSM_INVALID_STATE;
|
|---|
| 554 | }
|
|---|
| 555 | pVM->patm.s.offPatchMem = patmInfo.offPatchMem;
|
|---|
| 556 | pVM->patm.s.deltaReloc = patmInfo.deltaReloc;
|
|---|
| 557 | pVM->patm.s.uCurrentPatchIdx = patmInfo.uCurrentPatchIdx;
|
|---|
| 558 | pVM->patm.s.fOutOfMemory = patmInfo.fOutOfMemory;
|
|---|
| 559 |
|
|---|
| 560 | /* Lowest and highest patched instruction */
|
|---|
| 561 | pVM->patm.s.pPatchedInstrGCLowest = patmInfo.pPatchedInstrGCLowest;
|
|---|
| 562 | pVM->patm.s.pPatchedInstrGCHighest = patmInfo.pPatchedInstrGCHighest;
|
|---|
| 563 |
|
|---|
| 564 | /* Sysenter handlers */
|
|---|
| 565 | pVM->patm.s.pfnSysEnterGC = patmInfo.pfnSysEnterGC;
|
|---|
| 566 | pVM->patm.s.pfnSysEnterPatchGC = patmInfo.pfnSysEnterPatchGC;
|
|---|
| 567 | pVM->patm.s.uSysEnterPatchIdx = patmInfo.uSysEnterPatchIdx;
|
|---|
| 568 |
|
|---|
| 569 | Assert(patmInfo.ulCallDepth == 0 && pVM->patm.s.ulCallDepth == 0);
|
|---|
| 570 |
|
|---|
| 571 | Log(("pPatchMemGC %RRv vs old %RRv\n", pVM->patm.s.pPatchMemGC, patmInfo.pPatchMemGC));
|
|---|
| 572 | Log(("pGCStateGC %RRv vs old %RRv\n", pVM->patm.s.pGCStateGC, patmInfo.pGCStateGC));
|
|---|
| 573 | Log(("pGCStackGC %RRv vs old %RRv\n", pVM->patm.s.pGCStackGC, patmInfo.pGCStackGC));
|
|---|
| 574 | Log(("pCPUMCtxGC %RRv vs old %RRv\n", pVM->patm.s.pCPUMCtxGC, patmInfo.pCPUMCtxGC));
|
|---|
| 575 |
|
|---|
| 576 |
|
|---|
| 577 | /** @note patch statistics are not restored. */
|
|---|
| 578 |
|
|---|
| 579 | /*
|
|---|
| 580 | * Restore patch memory contents
|
|---|
| 581 | */
|
|---|
| 582 | Log(("Restore patch memory: new %RRv old %RRv\n", pVM->patm.s.pPatchMemGC, patmInfo.pPatchMemGC));
|
|---|
| 583 | rc = SSMR3GetMem(pSSM, pVM->patm.s.pPatchMemHC, pVM->patm.s.cbPatchMem);
|
|---|
| 584 | AssertRCReturn(rc, rc);
|
|---|
| 585 |
|
|---|
| 586 | /*
|
|---|
| 587 | * Restore GC state memory
|
|---|
| 588 | */
|
|---|
| 589 | RT_BZERO(pVM->patm.s.pGCStateHC, sizeof(PATMGCSTATE));
|
|---|
| 590 | rc = SSMR3GetStructEx(pSSM, pVM->patm.s.pGCStateHC, sizeof(PATMGCSTATE), SSMSTRUCT_FLAGS_MEM_BAND_AID, &g_aPatmGCStateFields[0], NULL);
|
|---|
| 591 | AssertRCReturn(rc, rc);
|
|---|
| 592 |
|
|---|
| 593 | /*
|
|---|
| 594 | * Restore PATM stack page
|
|---|
| 595 | */
|
|---|
| 596 | rc = SSMR3GetMem(pSSM, pVM->patm.s.pGCStackHC, PATM_STACK_TOTAL_SIZE);
|
|---|
| 597 | AssertRCReturn(rc, rc);
|
|---|
| 598 |
|
|---|
| 599 | /*
|
|---|
| 600 | * Load all patches
|
|---|
| 601 | */
|
|---|
| 602 | for (unsigned i = 0; i < patmInfo.savedstate.cPatches; i++)
|
|---|
| 603 | {
|
|---|
| 604 | PATMPATCHREC patch, *pPatchRec;
|
|---|
| 605 |
|
|---|
| 606 | RT_ZERO(patch);
|
|---|
| 607 | rc = SSMR3GetStructEx(pSSM, &patch, sizeof(patch), SSMSTRUCT_FLAGS_MEM_BAND_AID, &g_aPatmPatchRecFields[0], NULL);
|
|---|
| 608 | AssertRCReturn(rc, rc);
|
|---|
| 609 |
|
|---|
| 610 | Assert(!(patch.patch.flags & PATMFL_GLOBAL_FUNCTIONS));
|
|---|
| 611 |
|
|---|
| 612 | rc = MMHyperAlloc(pVM, sizeof(PATMPATCHREC), 0, MM_TAG_PATM_PATCH, (void **)&pPatchRec);
|
|---|
| 613 | if (RT_FAILURE(rc))
|
|---|
| 614 | {
|
|---|
| 615 | AssertMsgFailed(("Out of memory!!!!\n"));
|
|---|
| 616 | return VERR_NO_MEMORY;
|
|---|
| 617 | }
|
|---|
| 618 | /*
|
|---|
| 619 | * Only restore the patch part of the tree record; not the internal data (except the key of course)
|
|---|
| 620 | */
|
|---|
| 621 | pPatchRec->patch = patch.patch;
|
|---|
| 622 | pPatchRec->Core.Key = patch.Core.Key;
|
|---|
| 623 | pPatchRec->CoreOffset.Key = patch.CoreOffset.Key;
|
|---|
| 624 |
|
|---|
| 625 | Log(("Restoring patch %RRv -> %RRv\n", pPatchRec->patch.pPrivInstrGC, patmInfo.pPatchMemGC + pPatchRec->patch.pPatchBlockOffset));
|
|---|
| 626 | bool ret = RTAvloU32Insert(&pVM->patm.s.PatchLookupTreeHC->PatchTree, &pPatchRec->Core);
|
|---|
| 627 | Assert(ret);
|
|---|
| 628 | if (pPatchRec->patch.uState != PATCH_REFUSED)
|
|---|
| 629 | {
|
|---|
| 630 | if (pPatchRec->patch.pPatchBlockOffset)
|
|---|
| 631 | {
|
|---|
| 632 | /* We actually generated code for this patch. */
|
|---|
| 633 | ret = RTAvloU32Insert(&pVM->patm.s.PatchLookupTreeHC->PatchTreeByPatchAddr, &pPatchRec->CoreOffset);
|
|---|
| 634 | AssertMsg(ret, ("Inserting patch %RRv offset %08RX32 failed!!\n", pPatchRec->patch.pPrivInstrGC, pPatchRec->CoreOffset.Key));
|
|---|
| 635 | }
|
|---|
| 636 | }
|
|---|
| 637 | /* Set to zero as we don't need it anymore. */
|
|---|
| 638 | pPatchRec->patch.pTempInfo = 0;
|
|---|
| 639 |
|
|---|
| 640 | PATMP2GLOOKUPREC cacheRec;
|
|---|
| 641 | RT_ZERO(cacheRec);
|
|---|
| 642 | cacheRec.pPatch = &pPatchRec->patch;
|
|---|
| 643 |
|
|---|
| 644 | uint8_t *pPrivInstrHC = PATMGCVirtToHCVirt(pVM, &cacheRec, pPatchRec->patch.pPrivInstrGC);
|
|---|
| 645 | /* Can fail due to page or page table not present. */
|
|---|
| 646 |
|
|---|
| 647 | /*
|
|---|
| 648 | * Restore fixup records and correct HC pointers in fixup records
|
|---|
| 649 | */
|
|---|
| 650 | pPatchRec->patch.FixupTree = 0;
|
|---|
| 651 | pPatchRec->patch.nrFixups = 0; /* increased by patmPatchAddReloc32 */
|
|---|
| 652 | for (unsigned j = 0; j < patch.patch.nrFixups; j++)
|
|---|
| 653 | {
|
|---|
| 654 | RELOCREC rec;
|
|---|
| 655 | int32_t offset;
|
|---|
| 656 | RTRCPTR *pFixup;
|
|---|
| 657 |
|
|---|
| 658 | RT_ZERO(rec);
|
|---|
| 659 | rc = SSMR3GetStructEx(pSSM, &rec, sizeof(rec), SSMSTRUCT_FLAGS_MEM_BAND_AID, &g_aPatmRelocRec[0], NULL);
|
|---|
| 660 | AssertRCReturn(rc, rc);
|
|---|
| 661 |
|
|---|
| 662 | if (pPrivInstrHC)
|
|---|
| 663 | {
|
|---|
| 664 | /* rec.pRelocPos now contains the relative position inside the hypervisor area. */
|
|---|
| 665 | offset = (int32_t)(intptr_t)rec.pRelocPos;
|
|---|
| 666 | /* Convert to HC pointer again. */
|
|---|
| 667 | PATM_ADD_PTR(rec.pRelocPos, pVM->patm.s.pPatchMemHC);
|
|---|
| 668 | pFixup = (RTRCPTR *)rec.pRelocPos;
|
|---|
| 669 |
|
|---|
| 670 | if (pPatchRec->patch.uState != PATCH_REFUSED)
|
|---|
| 671 | {
|
|---|
| 672 | if ( rec.uType == FIXUP_REL_JMPTOPATCH
|
|---|
| 673 | && (pPatchRec->patch.flags & PATMFL_PATCHED_GUEST_CODE))
|
|---|
| 674 | {
|
|---|
| 675 | Assert(pPatchRec->patch.cbPatchJump == SIZEOF_NEARJUMP32 || pPatchRec->patch.cbPatchJump == SIZEOF_NEAR_COND_JUMP32);
|
|---|
| 676 | unsigned offset2 = (pPatchRec->patch.cbPatchJump == SIZEOF_NEARJUMP32) ? 1 : 2;
|
|---|
| 677 |
|
|---|
| 678 | rec.pRelocPos = pPrivInstrHC + offset2;
|
|---|
| 679 | pFixup = (RTRCPTR *)rec.pRelocPos;
|
|---|
| 680 | }
|
|---|
| 681 |
|
|---|
| 682 | patmCorrectFixup(pVM, uVersion, patmInfo, &pPatchRec->patch, &rec, offset, pFixup);
|
|---|
| 683 | }
|
|---|
| 684 |
|
|---|
| 685 | rc = patmPatchAddReloc32(pVM, &pPatchRec->patch, rec.pRelocPos, rec.uType, rec.pSource, rec.pDest);
|
|---|
| 686 | AssertRCReturn(rc, rc);
|
|---|
| 687 | }
|
|---|
| 688 | }
|
|---|
| 689 | /* Release previous lock if any. */
|
|---|
| 690 | if (cacheRec.Lock.pvMap)
|
|---|
| 691 | PGMPhysReleasePageMappingLock(pVM, &cacheRec.Lock);
|
|---|
| 692 |
|
|---|
| 693 | /* And all patch to guest lookup records */
|
|---|
| 694 | Assert(pPatchRec->patch.nrPatch2GuestRecs || pPatchRec->patch.uState == PATCH_REFUSED || (pPatchRec->patch.flags & (PATMFL_SYSENTER_XP | PATMFL_IDTHANDLER | PATMFL_TRAPHANDLER | PATMFL_INT3_REPLACEMENT)));
|
|---|
| 695 |
|
|---|
| 696 | pPatchRec->patch.Patch2GuestAddrTree = 0;
|
|---|
| 697 | pPatchRec->patch.Guest2PatchAddrTree = 0;
|
|---|
| 698 | if (pPatchRec->patch.nrPatch2GuestRecs)
|
|---|
| 699 | {
|
|---|
| 700 | RECPATCHTOGUEST rec;
|
|---|
| 701 | uint32_t nrPatch2GuestRecs = pPatchRec->patch.nrPatch2GuestRecs;
|
|---|
| 702 |
|
|---|
| 703 | pPatchRec->patch.nrPatch2GuestRecs = 0; /* incremented by patmr3AddP2GLookupRecord */
|
|---|
| 704 | for (uint32_t j=0;j<nrPatch2GuestRecs;j++)
|
|---|
| 705 | {
|
|---|
| 706 | RT_ZERO(rec);
|
|---|
| 707 | rc = SSMR3GetStructEx(pSSM, &rec, sizeof(rec), SSMSTRUCT_FLAGS_MEM_BAND_AID, &g_aPatmRecPatchToGuest[0], NULL);
|
|---|
| 708 | AssertRCReturn(rc, rc);
|
|---|
| 709 |
|
|---|
| 710 | patmr3AddP2GLookupRecord(pVM, &pPatchRec->patch, (uintptr_t)rec.Core.Key + pVM->patm.s.pPatchMemHC, rec.pOrgInstrGC, rec.enmType, rec.fDirty);
|
|---|
| 711 | }
|
|---|
| 712 | Assert(pPatchRec->patch.Patch2GuestAddrTree);
|
|---|
| 713 | }
|
|---|
| 714 |
|
|---|
| 715 | if (pPatchRec->patch.flags & PATMFL_CODE_MONITORED)
|
|---|
| 716 | {
|
|---|
| 717 | /* Insert the guest page lookup records (for detection self-modifying code) */
|
|---|
| 718 | rc = patmInsertPatchPages(pVM, &pPatchRec->patch);
|
|---|
| 719 | AssertRCReturn(rc, rc);
|
|---|
| 720 | }
|
|---|
| 721 |
|
|---|
| 722 | #if 0 /* can fail def LOG_ENABLED */
|
|---|
| 723 | if ( pPatchRec->patch.uState != PATCH_REFUSED
|
|---|
| 724 | && !(pPatchRec->patch.flags & PATMFL_INT3_REPLACEMENT))
|
|---|
| 725 | {
|
|---|
| 726 | pPatchRec->patch.pTempInfo = (PPATCHINFOTEMP)MMR3HeapAllocZ(pVM, MM_TAG_PATM_PATCH, sizeof(PATCHINFOTEMP));
|
|---|
| 727 | Log(("Patch code ----------------------------------------------------------\n"));
|
|---|
| 728 | patmr3DisasmCodeStream(pVM, PATCHCODE_PTR_GC(&pPatchRec->patch), PATCHCODE_PTR_GC(&pPatchRec->patch), patmr3DisasmCallback, &pPatchRec->patch);
|
|---|
| 729 | Log(("Patch code ends -----------------------------------------------------\n"));
|
|---|
| 730 | MMR3HeapFree(pPatchRec->patch.pTempInfo);
|
|---|
| 731 | pPatchRec->patch.pTempInfo = NULL;
|
|---|
| 732 | }
|
|---|
| 733 | #endif
|
|---|
| 734 | /* Remove the patch in case the gc mapping is not present. */
|
|---|
| 735 | if ( !pPrivInstrHC
|
|---|
| 736 | && pPatchRec->patch.uState == PATCH_ENABLED)
|
|---|
| 737 | {
|
|---|
| 738 | Log(("Remove patch %RGv due to failed HC address translation\n", pPatchRec->patch.pPrivInstrGC));
|
|---|
| 739 | PATMR3RemovePatch(pVM, pPatchRec->patch.pPrivInstrGC);
|
|---|
| 740 | }
|
|---|
| 741 | }
|
|---|
| 742 |
|
|---|
| 743 | /*
|
|---|
| 744 | * Correct absolute fixups in the global patch. (helper functions)
|
|---|
| 745 | * Bit of a mess. Uses the new patch record, but restored patch functions.
|
|---|
| 746 | */
|
|---|
| 747 | PRELOCREC pRec = 0;
|
|---|
| 748 | AVLPVKEY key = 0;
|
|---|
| 749 |
|
|---|
| 750 | Log(("Correct fixups in global helper functions\n"));
|
|---|
| 751 | while (true)
|
|---|
| 752 | {
|
|---|
| 753 | int32_t offset;
|
|---|
| 754 | RTRCPTR *pFixup;
|
|---|
| 755 |
|
|---|
| 756 | /* Get the record that's closest from above */
|
|---|
| 757 | pRec = (PRELOCREC)RTAvlPVGetBestFit(&pVM->patm.s.pGlobalPatchRec->patch.FixupTree, key, true);
|
|---|
| 758 | if (pRec == 0)
|
|---|
| 759 | break;
|
|---|
| 760 |
|
|---|
| 761 | key = (AVLPVKEY)(pRec->pRelocPos + 1); /* search for the next record during the next round. */
|
|---|
| 762 |
|
|---|
| 763 | /* rec.pRelocPos now contains the relative position inside the hypervisor area. */
|
|---|
| 764 | offset = (int32_t)(pRec->pRelocPos - pVM->patm.s.pPatchMemHC);
|
|---|
| 765 | pFixup = (RTRCPTR *)pRec->pRelocPos;
|
|---|
| 766 |
|
|---|
| 767 | /* Correct fixups that refer to PATM structures in the hypervisor region (their addresses might have changed). */
|
|---|
| 768 | patmCorrectFixup(pVM, uVersion, patmInfo, &pVM->patm.s.pGlobalPatchRec->patch, pRec, offset, pFixup);
|
|---|
| 769 | }
|
|---|
| 770 |
|
|---|
| 771 | #ifdef VBOX_WITH_STATISTICS
|
|---|
| 772 | /*
|
|---|
| 773 | * Restore relevant old statistics
|
|---|
| 774 | */
|
|---|
| 775 | pVM->patm.s.StatDisabled = patmInfo.StatDisabled;
|
|---|
| 776 | pVM->patm.s.StatUnusable = patmInfo.StatUnusable;
|
|---|
| 777 | pVM->patm.s.StatEnabled = patmInfo.StatEnabled;
|
|---|
| 778 | pVM->patm.s.StatInstalled = patmInfo.StatInstalled;
|
|---|
| 779 | #endif
|
|---|
| 780 |
|
|---|
| 781 | return VINF_SUCCESS;
|
|---|
| 782 | }
|
|---|
| 783 |
|
|---|
| 784 | /**
|
|---|
| 785 | * Correct fixups to predefined hypervisor PATM regions. (their addresses might have changed)
|
|---|
| 786 | *
|
|---|
| 787 | * @returns VBox status code.
|
|---|
| 788 | * @param pVM VM Handle.
|
|---|
| 789 | * @param ulSSMVersion SSM version
|
|---|
| 790 | * @param patmInfo Saved PATM structure
|
|---|
| 791 | * @param pPatch Patch record
|
|---|
| 792 | * @param pRec Relocation record
|
|---|
| 793 | * @param offset Offset of referenced data/code
|
|---|
| 794 | * @param pFixup Fixup address
|
|---|
| 795 | */
|
|---|
| 796 | static void patmCorrectFixup(PVM pVM, unsigned ulSSMVersion, PATM &patmInfo, PPATCHINFO pPatch, PRELOCREC pRec, int32_t offset, RTRCPTR *pFixup)
|
|---|
| 797 | {
|
|---|
| 798 | int32_t delta = pVM->patm.s.pPatchMemGC - patmInfo.pPatchMemGC;
|
|---|
| 799 |
|
|---|
| 800 | switch (pRec->uType)
|
|---|
| 801 | {
|
|---|
| 802 | case FIXUP_ABSOLUTE:
|
|---|
| 803 | {
|
|---|
| 804 | if (pRec->pSource && !PATMIsPatchGCAddr(pVM, (RTRCUINTPTR)pRec->pSource))
|
|---|
| 805 | break;
|
|---|
| 806 |
|
|---|
| 807 | if ( *pFixup >= patmInfo.pGCStateGC
|
|---|
| 808 | && *pFixup < patmInfo.pGCStateGC + sizeof(PATMGCSTATE))
|
|---|
| 809 | {
|
|---|
| 810 | LogFlow(("Changing absolute GCState at %RRv from %RRv to %RRv\n", patmInfo.pPatchMemGC + offset, *pFixup, (*pFixup - patmInfo.pGCStateGC) + pVM->patm.s.pGCStateGC));
|
|---|
| 811 | *pFixup = (*pFixup - patmInfo.pGCStateGC) + pVM->patm.s.pGCStateGC;
|
|---|
| 812 | }
|
|---|
| 813 | else
|
|---|
| 814 | if ( *pFixup >= patmInfo.pCPUMCtxGC
|
|---|
| 815 | && *pFixup < patmInfo.pCPUMCtxGC + sizeof(CPUMCTX))
|
|---|
| 816 | {
|
|---|
| 817 | LogFlow(("Changing absolute CPUMCTX at %RRv from %RRv to %RRv\n", patmInfo.pPatchMemGC + offset, *pFixup, (*pFixup - patmInfo.pCPUMCtxGC) + pVM->patm.s.pCPUMCtxGC));
|
|---|
| 818 |
|
|---|
| 819 | /* The CPUMCTX structure has completely changed, so correct the offsets too. */
|
|---|
| 820 | if (ulSSMVersion == PATM_SSM_VERSION_VER16)
|
|---|
| 821 | {
|
|---|
| 822 | unsigned uCPUMOffset = *pFixup - patmInfo.pCPUMCtxGC;
|
|---|
| 823 |
|
|---|
| 824 | /* ''case RT_OFFSETOF()'' does not work as gcc refuses to use & as a constant expression.
|
|---|
| 825 | * Defining RT_OFFSETOF as __builtin_offsetof for gcc would make this possible. But this
|
|---|
| 826 | * function is not available in older gcc versions, at least not in gcc-3.3 */
|
|---|
| 827 | if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, dr0))
|
|---|
| 828 | {
|
|---|
| 829 | LogFlow(("Changing dr[0] offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, dr[0])));
|
|---|
| 830 | *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr[0]);
|
|---|
| 831 | }
|
|---|
| 832 | else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, dr1))
|
|---|
| 833 | {
|
|---|
| 834 | LogFlow(("Changing dr[1] offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, dr[1])));
|
|---|
| 835 | *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr[1]);
|
|---|
| 836 | }
|
|---|
| 837 | else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, dr2))
|
|---|
| 838 | {
|
|---|
| 839 | LogFlow(("Changing dr[2] offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, dr[2])));
|
|---|
| 840 | *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr[2]);
|
|---|
| 841 | }
|
|---|
| 842 | else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, dr3))
|
|---|
| 843 | {
|
|---|
| 844 | LogFlow(("Changing dr[3] offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, dr[3])));
|
|---|
| 845 | *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr[3]);
|
|---|
| 846 | }
|
|---|
| 847 | else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, dr4))
|
|---|
| 848 | {
|
|---|
| 849 | LogFlow(("Changing dr[4] offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, dr[4])));
|
|---|
| 850 | *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr[4]);
|
|---|
| 851 | }
|
|---|
| 852 | else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, dr5))
|
|---|
| 853 | {
|
|---|
| 854 | LogFlow(("Changing dr[5] offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, dr[5])));
|
|---|
| 855 | *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr[5]);
|
|---|
| 856 | }
|
|---|
| 857 | else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, dr6))
|
|---|
| 858 | {
|
|---|
| 859 | LogFlow(("Changing dr[6] offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, dr[6])));
|
|---|
| 860 | *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr[6]);
|
|---|
| 861 | }
|
|---|
| 862 | else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, dr7))
|
|---|
| 863 | {
|
|---|
| 864 | LogFlow(("Changing dr[7] offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, dr[7])));
|
|---|
| 865 | *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr[7]);
|
|---|
| 866 | }
|
|---|
| 867 | else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, cr0))
|
|---|
| 868 | {
|
|---|
| 869 | LogFlow(("Changing cr0 offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, cr0)));
|
|---|
| 870 | *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, cr0);
|
|---|
| 871 | }
|
|---|
| 872 | else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, cr2))
|
|---|
| 873 | {
|
|---|
| 874 | LogFlow(("Changing cr2 offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, cr2)));
|
|---|
| 875 | *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, cr2);
|
|---|
| 876 | }
|
|---|
| 877 | else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, cr3))
|
|---|
| 878 | {
|
|---|
| 879 | LogFlow(("Changing cr3 offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, cr3)));
|
|---|
| 880 | *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, cr3);
|
|---|
| 881 | }
|
|---|
| 882 | else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, cr4))
|
|---|
| 883 | {
|
|---|
| 884 | LogFlow(("Changing cr4 offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, cr4)));
|
|---|
| 885 | *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, cr4);
|
|---|
| 886 | }
|
|---|
| 887 | else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, tr))
|
|---|
| 888 | {
|
|---|
| 889 | LogFlow(("Changing tr offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, tr)));
|
|---|
| 890 | *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, tr);
|
|---|
| 891 | }
|
|---|
| 892 | else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, ldtr))
|
|---|
| 893 | {
|
|---|
| 894 | LogFlow(("Changing ldtr offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, ldtr)));
|
|---|
| 895 | *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, ldtr);
|
|---|
| 896 | }
|
|---|
| 897 | else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, gdtr.pGdt))
|
|---|
| 898 | {
|
|---|
| 899 | LogFlow(("Changing pGdt offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, gdtr.pGdt)));
|
|---|
| 900 | *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, gdtr.pGdt);
|
|---|
| 901 | }
|
|---|
| 902 | else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, gdtr.cbGdt))
|
|---|
| 903 | {
|
|---|
| 904 | LogFlow(("Changing cbGdt offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, gdtr.cbGdt)));
|
|---|
| 905 | *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, gdtr.cbGdt);
|
|---|
| 906 | }
|
|---|
| 907 | else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, idtr.pIdt))
|
|---|
| 908 | {
|
|---|
| 909 | LogFlow(("Changing pIdt offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, idtr.pIdt)));
|
|---|
| 910 | *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, idtr.pIdt);
|
|---|
| 911 | }
|
|---|
| 912 | else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, idtr.cbIdt))
|
|---|
| 913 | {
|
|---|
| 914 | LogFlow(("Changing cbIdt offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, idtr.cbIdt)));
|
|---|
| 915 | *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, idtr.cbIdt);
|
|---|
| 916 | }
|
|---|
| 917 | else
|
|---|
| 918 | AssertMsgFailed(("Unexpected CPUMCTX offset %x\n", uCPUMOffset));
|
|---|
| 919 | }
|
|---|
| 920 | else
|
|---|
| 921 | *pFixup = (*pFixup - patmInfo.pCPUMCtxGC) + pVM->patm.s.pCPUMCtxGC;
|
|---|
| 922 | }
|
|---|
| 923 | else
|
|---|
| 924 | if ( *pFixup >= patmInfo.pStatsGC
|
|---|
| 925 | && *pFixup < patmInfo.pStatsGC + PATM_STAT_MEMSIZE)
|
|---|
| 926 | {
|
|---|
| 927 | LogFlow(("Changing absolute Stats at %RRv from %RRv to %RRv\n", patmInfo.pPatchMemGC + offset, *pFixup, (*pFixup - patmInfo.pStatsGC) + pVM->patm.s.pStatsGC));
|
|---|
| 928 | *pFixup = (*pFixup - patmInfo.pStatsGC) + pVM->patm.s.pStatsGC;
|
|---|
| 929 | }
|
|---|
| 930 | else
|
|---|
| 931 | if ( *pFixup >= patmInfo.pGCStackGC
|
|---|
| 932 | && *pFixup < patmInfo.pGCStackGC + PATM_STACK_TOTAL_SIZE)
|
|---|
| 933 | {
|
|---|
| 934 | LogFlow(("Changing absolute Stack at %RRv from %RRv to %RRv\n", patmInfo.pPatchMemGC + offset, *pFixup, (*pFixup - patmInfo.pGCStackGC) + pVM->patm.s.pGCStackGC));
|
|---|
| 935 | *pFixup = (*pFixup - patmInfo.pGCStackGC) + pVM->patm.s.pGCStackGC;
|
|---|
| 936 | }
|
|---|
| 937 | else
|
|---|
| 938 | if ( *pFixup >= patmInfo.pPatchMemGC
|
|---|
| 939 | && *pFixup < patmInfo.pPatchMemGC + patmInfo.cbPatchMem)
|
|---|
| 940 | {
|
|---|
| 941 | LogFlow(("Changing absolute PatchMem at %RRv from %RRv to %RRv\n", patmInfo.pPatchMemGC + offset, *pFixup, (*pFixup - patmInfo.pPatchMemGC) + pVM->patm.s.pPatchMemGC));
|
|---|
| 942 | *pFixup = (*pFixup - patmInfo.pPatchMemGC) + pVM->patm.s.pPatchMemGC;
|
|---|
| 943 | }
|
|---|
| 944 | else
|
|---|
| 945 | /* Boldly ASSUMES:
|
|---|
| 946 | * 1. That pCPUMCtxGC is in the VM structure and that its location is
|
|---|
| 947 | * at the first page of the same 4 MB chunk.
|
|---|
| 948 | * 2. That the forced actions were in the first 32 bytes of the VM
|
|---|
| 949 | * structure.
|
|---|
| 950 | * 3. That the CPUM leafs are less than 8KB into the structure. */
|
|---|
| 951 | if ( ulSSMVersion <= PATM_SSM_VERSION_FIXUP_HACK
|
|---|
| 952 | && *pFixup - (patmInfo.pCPUMCtxGC & UINT32_C(0xffc00000)) < UINT32_C(32))
|
|---|
| 953 | {
|
|---|
| 954 | LogFlow(("Changing fLocalForcedActions fixup from %RRv to %RRv\n", *pFixup, pVM->pVMRC + RT_OFFSETOF(VM, aCpus[0].fLocalForcedActions)));
|
|---|
| 955 | *pFixup = pVM->pVMRC + RT_OFFSETOF(VM, aCpus[0].fLocalForcedActions);
|
|---|
| 956 | }
|
|---|
| 957 | else
|
|---|
| 958 | if ( ulSSMVersion <= PATM_SSM_VERSION_FIXUP_HACK
|
|---|
| 959 | && *pFixup - (patmInfo.pCPUMCtxGC & UINT32_C(0xffc00000)) < UINT32_C(8192))
|
|---|
| 960 | {
|
|---|
| 961 | static int cCpuidFixup = 0;
|
|---|
| 962 | #ifdef LOG_ENABLED
|
|---|
| 963 | RTRCPTR oldFixup = *pFixup;
|
|---|
| 964 | #endif
|
|---|
| 965 | /* very dirty assumptions about the cpuid patch and cpuid ordering. */
|
|---|
| 966 | switch(cCpuidFixup & 3)
|
|---|
| 967 | {
|
|---|
| 968 | case 0:
|
|---|
| 969 | *pFixup = CPUMR3GetGuestCpuIdDefRCPtr(pVM);
|
|---|
| 970 | break;
|
|---|
| 971 | case 1:
|
|---|
| 972 | *pFixup = CPUMR3GetGuestCpuIdStdRCPtr(pVM);
|
|---|
| 973 | break;
|
|---|
| 974 | case 2:
|
|---|
| 975 | *pFixup = CPUMR3GetGuestCpuIdExtRCPtr(pVM);
|
|---|
| 976 | break;
|
|---|
| 977 | case 3:
|
|---|
| 978 | *pFixup = CPUMR3GetGuestCpuIdCentaurRCPtr(pVM);
|
|---|
| 979 | break;
|
|---|
| 980 | }
|
|---|
| 981 | LogFlow(("Changing cpuid fixup %d from %RRv to %RRv\n", cCpuidFixup, oldFixup, *pFixup));
|
|---|
| 982 | cCpuidFixup++;
|
|---|
| 983 | }
|
|---|
| 984 | else
|
|---|
| 985 | if (ulSSMVersion >= PATM_SSM_VERSION)
|
|---|
| 986 | {
|
|---|
| 987 | #ifdef LOG_ENABLED
|
|---|
| 988 | RTRCPTR oldFixup = *pFixup;
|
|---|
| 989 | #endif
|
|---|
| 990 | /* Core.Key abused to store the type of fixup */
|
|---|
| 991 | switch ((uintptr_t)pRec->Core.Key)
|
|---|
| 992 | {
|
|---|
| 993 | case PATM_FIXUP_CPU_FF_ACTION:
|
|---|
| 994 | *pFixup = pVM->pVMRC + RT_OFFSETOF(VM, aCpus[0].fLocalForcedActions);
|
|---|
| 995 | LogFlow(("Changing cpu ff action fixup from %x to %x\n", oldFixup, *pFixup));
|
|---|
| 996 | break;
|
|---|
| 997 | case PATM_FIXUP_CPUID_DEFAULT:
|
|---|
| 998 | *pFixup = CPUMR3GetGuestCpuIdDefRCPtr(pVM);
|
|---|
| 999 | LogFlow(("Changing cpuid def fixup from %x to %x\n", oldFixup, *pFixup));
|
|---|
| 1000 | break;
|
|---|
| 1001 | case PATM_FIXUP_CPUID_STANDARD:
|
|---|
| 1002 | *pFixup = CPUMR3GetGuestCpuIdStdRCPtr(pVM);
|
|---|
| 1003 | LogFlow(("Changing cpuid std fixup from %x to %x\n", oldFixup, *pFixup));
|
|---|
| 1004 | break;
|
|---|
| 1005 | case PATM_FIXUP_CPUID_EXTENDED:
|
|---|
| 1006 | *pFixup = CPUMR3GetGuestCpuIdExtRCPtr(pVM);
|
|---|
| 1007 | LogFlow(("Changing cpuid ext fixup from %x to %x\n", oldFixup, *pFixup));
|
|---|
| 1008 | break;
|
|---|
| 1009 | case PATM_FIXUP_CPUID_CENTAUR:
|
|---|
| 1010 | *pFixup = CPUMR3GetGuestCpuIdCentaurRCPtr(pVM);
|
|---|
| 1011 | LogFlow(("Changing cpuid centaur fixup from %x to %x\n", oldFixup, *pFixup));
|
|---|
| 1012 | break;
|
|---|
| 1013 | default:
|
|---|
| 1014 | AssertMsgFailed(("Unexpected fixup value %x\n", *pFixup));
|
|---|
| 1015 | break;
|
|---|
| 1016 | }
|
|---|
| 1017 | }
|
|---|
| 1018 |
|
|---|
| 1019 | #ifdef RT_OS_WINDOWS
|
|---|
| 1020 | AssertCompile(RT_OFFSETOF(VM, fGlobalForcedActions) < 32);
|
|---|
| 1021 | #endif
|
|---|
| 1022 | break;
|
|---|
| 1023 | }
|
|---|
| 1024 |
|
|---|
| 1025 | case FIXUP_REL_JMPTOPATCH:
|
|---|
| 1026 | {
|
|---|
| 1027 | RTRCPTR pTarget = (RTRCPTR)((RTRCINTPTR)pRec->pDest + delta);
|
|---|
| 1028 |
|
|---|
| 1029 | if ( pPatch->uState == PATCH_ENABLED
|
|---|
| 1030 | && (pPatch->flags & PATMFL_PATCHED_GUEST_CODE))
|
|---|
| 1031 | {
|
|---|
| 1032 | uint8_t oldJump[SIZEOF_NEAR_COND_JUMP32];
|
|---|
| 1033 | uint8_t temp[SIZEOF_NEAR_COND_JUMP32];
|
|---|
| 1034 | RTRCPTR pJumpOffGC;
|
|---|
| 1035 | RTRCINTPTR displ = (RTRCINTPTR)pTarget - (RTRCINTPTR)pRec->pSource;
|
|---|
| 1036 | RTRCINTPTR displOld= (RTRCINTPTR)pRec->pDest - (RTRCINTPTR)pRec->pSource;
|
|---|
| 1037 |
|
|---|
| 1038 | Log(("Relative fixup (g2p) %08X -> %08X at %08X (source=%08x, target=%08x)\n", *(int32_t*)pRec->pRelocPos, displ, pRec->pRelocPos, pRec->pSource, pRec->pDest));
|
|---|
| 1039 |
|
|---|
| 1040 | Assert(pRec->pSource - pPatch->cbPatchJump == pPatch->pPrivInstrGC);
|
|---|
| 1041 | #ifdef PATM_RESOLVE_CONFLICTS_WITH_JUMP_PATCHES
|
|---|
| 1042 | if (pPatch->cbPatchJump == SIZEOF_NEAR_COND_JUMP32)
|
|---|
| 1043 | {
|
|---|
| 1044 | Assert(pPatch->flags & PATMFL_JUMP_CONFLICT);
|
|---|
| 1045 |
|
|---|
| 1046 | pJumpOffGC = pPatch->pPrivInstrGC + 2; //two byte opcode
|
|---|
| 1047 | oldJump[0] = pPatch->aPrivInstr[0];
|
|---|
| 1048 | oldJump[1] = pPatch->aPrivInstr[1];
|
|---|
| 1049 | *(RTRCUINTPTR *)&oldJump[2] = displOld;
|
|---|
| 1050 | }
|
|---|
| 1051 | else
|
|---|
| 1052 | #endif
|
|---|
| 1053 | if (pPatch->cbPatchJump == SIZEOF_NEARJUMP32)
|
|---|
| 1054 | {
|
|---|
| 1055 | pJumpOffGC = pPatch->pPrivInstrGC + 1; //one byte opcode
|
|---|
| 1056 | oldJump[0] = 0xE9;
|
|---|
| 1057 | *(RTRCUINTPTR *)&oldJump[1] = displOld;
|
|---|
| 1058 | }
|
|---|
| 1059 | else
|
|---|
| 1060 | {
|
|---|
| 1061 | AssertMsgFailed(("Invalid patch jump size %d\n", pPatch->cbPatchJump));
|
|---|
| 1062 | break;
|
|---|
| 1063 | }
|
|---|
| 1064 | Assert(pPatch->cbPatchJump <= sizeof(temp));
|
|---|
| 1065 |
|
|---|
| 1066 | /*
|
|---|
| 1067 | * Read old patch jump and compare it to the one we previously installed
|
|---|
| 1068 | */
|
|---|
| 1069 | int rc = PGMPhysSimpleReadGCPtr(VMMGetCpu0(pVM), temp, pPatch->pPrivInstrGC, pPatch->cbPatchJump);
|
|---|
| 1070 | Assert(RT_SUCCESS(rc) || rc == VERR_PAGE_NOT_PRESENT || rc == VERR_PAGE_TABLE_NOT_PRESENT);
|
|---|
| 1071 |
|
|---|
| 1072 | if (rc == VERR_PAGE_NOT_PRESENT || rc == VERR_PAGE_TABLE_NOT_PRESENT)
|
|---|
| 1073 | {
|
|---|
| 1074 | RTRCPTR pPage = pPatch->pPrivInstrGC & PAGE_BASE_GC_MASK;
|
|---|
| 1075 |
|
|---|
| 1076 | rc = PGMR3HandlerVirtualRegister(pVM, PGMVIRTHANDLERTYPE_ALL, pPage, pPage + (PAGE_SIZE - 1) /* inclusive! */, 0, patmVirtPageHandler, "PATMGCMonitorPage", 0, "PATMMonitorPatchJump");
|
|---|
| 1077 | Assert(RT_SUCCESS(rc) || rc == VERR_PGM_HANDLER_VIRTUAL_CONFLICT);
|
|---|
| 1078 | }
|
|---|
| 1079 | else
|
|---|
| 1080 | if (memcmp(temp, oldJump, pPatch->cbPatchJump))
|
|---|
| 1081 | {
|
|---|
| 1082 | Log(("PATM: Patch jump was overwritten -> disabling patch!!\n"));
|
|---|
| 1083 | /*
|
|---|
| 1084 | * Disable patch; this is not a good solution
|
|---|
| 1085 | */
|
|---|
| 1086 | /* @todo hopefully it was completely overwritten (if the read was successful)!!!! */
|
|---|
| 1087 | pPatch->uState = PATCH_DISABLED;
|
|---|
| 1088 | }
|
|---|
| 1089 | else
|
|---|
| 1090 | if (RT_SUCCESS(rc))
|
|---|
| 1091 | {
|
|---|
| 1092 | rc = PGMPhysSimpleDirtyWriteGCPtr(VMMGetCpu0(pVM), pJumpOffGC, &displ, sizeof(displ));
|
|---|
| 1093 | AssertRC(rc);
|
|---|
| 1094 | }
|
|---|
| 1095 | else
|
|---|
| 1096 | AssertMsgFailed(("Unexpected error %d from MMR3PhysReadGCVirt\n", rc));
|
|---|
| 1097 | }
|
|---|
| 1098 | else
|
|---|
| 1099 | Log(("Skip the guest jump to patch code for this disabled patch %08X\n", pRec->pRelocPos));
|
|---|
| 1100 |
|
|---|
| 1101 | pRec->pDest = pTarget;
|
|---|
| 1102 | break;
|
|---|
| 1103 | }
|
|---|
| 1104 |
|
|---|
| 1105 | case FIXUP_REL_JMPTOGUEST:
|
|---|
| 1106 | {
|
|---|
| 1107 | RTRCPTR pSource = (RTRCPTR)((RTRCINTPTR)pRec->pSource + delta);
|
|---|
| 1108 | RTRCINTPTR displ = (RTRCINTPTR)pRec->pDest - (RTRCINTPTR)pSource;
|
|---|
| 1109 |
|
|---|
| 1110 | Assert(!(pPatch->flags & PATMFL_GLOBAL_FUNCTIONS));
|
|---|
| 1111 | Log(("Relative fixup (p2g) %08X -> %08X at %08X (source=%08x, target=%08x)\n", *(int32_t*)pRec->pRelocPos, displ, pRec->pRelocPos, pRec->pSource, pRec->pDest));
|
|---|
| 1112 | *(RTRCUINTPTR *)pRec->pRelocPos = displ;
|
|---|
| 1113 | pRec->pSource = pSource;
|
|---|
| 1114 | break;
|
|---|
| 1115 |
|
|---|
| 1116 | }
|
|---|
| 1117 | }
|
|---|
| 1118 | }
|
|---|
| 1119 |
|
|---|
