/* $Id: PATMSSM.cpp 63560 2016-08-16 14:01:20Z vboxsync $ */ /** @file * PATMSSM - Dynamic Guest OS Patching Manager; Save and load state * * NOTE: CSAM assumes patch memory is never reused!! */ /* * Copyright (C) 2006-2016 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_PATM #include #include #include #include #include #include #include #include #include "PATMInternal.h" #include "PATMPatch.h" #include "PATMA.h" #include #include #include #include #include #include #include #include #include #include #include /** * Patch information - SSM version. * * the difference is the missing pTrampolinePatchesHead member * to avoid changing the saved state version for now (will come later). */ typedef struct PATCHINFOSSM { uint32_t uState; uint32_t uOldState; DISCPUMODE uOpMode; /* GC pointer of privileged instruction */ RCPTRTYPE(uint8_t *) pPrivInstrGC; R3PTRTYPE(uint8_t *) unusedHC; /** @todo Can't remove due to structure size dependencies in saved states. */ uint8_t aPrivInstr[MAX_INSTR_SIZE]; uint32_t cbPrivInstr; uint32_t opcode; //opcode for priv instr (OP_*) uint32_t cbPatchJump; //patch jump size /* Only valid for PATMFL_JUMP_CONFLICT patches */ RTRCPTR pPatchJumpDestGC; RTGCUINTPTR32 pPatchBlockOffset; uint32_t cbPatchBlockSize; uint32_t uCurPatchOffset; #if HC_ARCH_BITS == 64 uint32_t Alignment0; /**< Align flags correctly. */ #endif uint64_t flags; /** * Lowest and highest patched GC instruction address. To optimize searches. */ RTRCPTR pInstrGCLowest; RTRCPTR pInstrGCHighest; /* Tree of fixup records for the patch. */ R3PTRTYPE(PAVLPVNODECORE) FixupTree; uint32_t nrFixups; /* Tree of jumps inside the generated patch code. */ uint32_t nrJumpRecs; R3PTRTYPE(PAVLPVNODECORE) JumpTree; /** * Lookup trees for determining the corresponding guest address of an * instruction in the patch block. */ R3PTRTYPE(PAVLU32NODECORE) Patch2GuestAddrTree; R3PTRTYPE(PAVLU32NODECORE) Guest2PatchAddrTree; uint32_t nrPatch2GuestRecs; #if HC_ARCH_BITS == 64 uint32_t Alignment1; #endif /* Unused, but can't remove due to structure size dependencies in the saved state. */ PATMP2GLOOKUPREC_OBSOLETE unused; /* Temporary information during patch creation. Don't waste hypervisor memory for this. */ R3PTRTYPE(PPATCHINFOTEMP) pTempInfo; /* Count the number of writes to the corresponding guest code. */ uint32_t cCodeWrites; /* Count the number of invalid writes to pages monitored for the patch. */ //some statistics to determine if we should keep this patch activated uint32_t cTraps; uint32_t cInvalidWrites; // Index into the uPatchRun and uPatchTrap arrays (0..MAX_PATCHES-1) uint32_t uPatchIdx; /* First opcode byte, that's overwritten when a patch is marked dirty. */ uint8_t bDirtyOpcode; uint8_t Alignment2[7]; /**< Align the structure size on a 8-byte boundary. */ } PATCHINFOSSM, *PPATCHINFOSSM; /** * Lookup record for patches - SSM version. */ typedef struct PATMPATCHRECSSM { /** The key is a GC virtual address. */ AVLOU32NODECORE Core; /** The key is a patch offset. */ AVLOU32NODECORE CoreOffset; PATCHINFOSSM patch; } PATMPATCHRECSSM, *PPATMPATCHRECSSM; /** * Callback arguments. */ typedef struct PATMCALLBACKARGS { PVM pVM; PSSMHANDLE pSSM; PPATMPATCHREC pPatchRec; } PATMCALLBACKARGS; typedef PATMCALLBACKARGS *PPATMCALLBACKARGS; /********************************************************************************************************************************* * Internal Functions * *********************************************************************************************************************************/ static int patmCorrectFixup(PVM pVM, unsigned ulSSMVersion, PATM &patmInfo, PPATCHINFO pPatch, PRELOCREC pRec, int32_t offset, RTRCPTR *pFixup); /********************************************************************************************************************************* * Global Variables * *********************************************************************************************************************************/ /** * SSM descriptor table for the PATM structure. */ static SSMFIELD const g_aPatmFields[] = { /** @todo there are a bunch more fields here which can be marked as ignored. */ SSMFIELD_ENTRY_IGNORE( PATM, offVM), SSMFIELD_ENTRY_RCPTR( PATM, pPatchMemGC), SSMFIELD_ENTRY_IGN_HCPTR( PATM, pPatchMemHC), SSMFIELD_ENTRY( PATM, cbPatchMem), SSMFIELD_ENTRY( PATM, offPatchMem), SSMFIELD_ENTRY( PATM, fOutOfMemory), SSMFIELD_ENTRY_PAD_HC_AUTO( 3, 3), SSMFIELD_ENTRY( PATM, deltaReloc), SSMFIELD_ENTRY_IGN_HCPTR( PATM, pGCStateHC), SSMFIELD_ENTRY_RCPTR( PATM, pGCStateGC), SSMFIELD_ENTRY_RCPTR( PATM, pGCStackGC), SSMFIELD_ENTRY_IGN_HCPTR( PATM, pGCStackHC), SSMFIELD_ENTRY_RCPTR( PATM, pCPUMCtxGC), SSMFIELD_ENTRY_RCPTR( PATM, pStatsGC), SSMFIELD_ENTRY_IGN_HCPTR( PATM, pStatsHC), SSMFIELD_ENTRY( PATM, uCurrentPatchIdx), SSMFIELD_ENTRY( PATM, ulCallDepth), SSMFIELD_ENTRY( PATM, cPageRecords), SSMFIELD_ENTRY_RCPTR( PATM, pPatchedInstrGCLowest), SSMFIELD_ENTRY_RCPTR( PATM, pPatchedInstrGCHighest), SSMFIELD_ENTRY_RCPTR( PATM, PatchLookupTreeGC), SSMFIELD_ENTRY_IGN_HCPTR( PATM, PatchLookupTreeHC), SSMFIELD_ENTRY_RCPTR( PATM, pfnHelperCallGC), SSMFIELD_ENTRY_RCPTR( PATM, pfnHelperRetGC), SSMFIELD_ENTRY_RCPTR( PATM, pfnHelperJumpGC), SSMFIELD_ENTRY_RCPTR( PATM, pfnHelperIretGC), SSMFIELD_ENTRY_IGN_HCPTR( PATM, pGlobalPatchRec), SSMFIELD_ENTRY_RCPTR( PATM, pfnSysEnterGC), SSMFIELD_ENTRY_RCPTR( PATM, pfnSysEnterPatchGC), SSMFIELD_ENTRY( PATM, uSysEnterPatchIdx), SSMFIELD_ENTRY_RCPTR( PATM, pvFaultMonitor), SSMFIELD_ENTRY_GCPHYS( PATM, mmio.GCPhys), SSMFIELD_ENTRY_RCPTR( PATM, mmio.pCachedData), SSMFIELD_ENTRY_IGN_RCPTR( PATM, mmio.Alignment0), SSMFIELD_ENTRY_IGN_HCPTR( PATM, savedstate.pSSM), SSMFIELD_ENTRY( PATM, savedstate.cPatches), SSMFIELD_ENTRY_PAD_HC64( PATM, savedstate.Alignment0, sizeof(uint32_t)), SSMFIELD_ENTRY_IGNORE( PATM, StatNrOpcodeRead), SSMFIELD_ENTRY_IGNORE( PATM, StatDisabled), SSMFIELD_ENTRY_IGNORE( PATM, StatUnusable), SSMFIELD_ENTRY_IGNORE( PATM, StatEnabled), SSMFIELD_ENTRY_IGNORE( PATM, StatInstalled), SSMFIELD_ENTRY_IGNORE( PATM, StatInstalledFunctionPatches), SSMFIELD_ENTRY_IGNORE( PATM, StatInstalledTrampoline), SSMFIELD_ENTRY_IGNORE( PATM, StatInstalledJump), SSMFIELD_ENTRY_IGNORE( PATM, StatInt3Callable), SSMFIELD_ENTRY_IGNORE( PATM, StatInt3BlockRun), SSMFIELD_ENTRY_IGNORE( PATM, StatOverwritten), SSMFIELD_ENTRY_IGNORE( PATM, StatFixedConflicts), SSMFIELD_ENTRY_IGNORE( PATM, StatFlushed), SSMFIELD_ENTRY_IGNORE( PATM, StatPageBoundaryCrossed), SSMFIELD_ENTRY_IGNORE( PATM, StatMonitored), SSMFIELD_ENTRY_IGNORE( PATM, StatHandleTrap), SSMFIELD_ENTRY_IGNORE( PATM, StatSwitchBack), SSMFIELD_ENTRY_IGNORE( PATM, StatSwitchBackFail), SSMFIELD_ENTRY_IGNORE( PATM, StatPATMMemoryUsed), SSMFIELD_ENTRY_IGNORE( PATM, StatDuplicateREQSuccess), SSMFIELD_ENTRY_IGNORE( PATM, StatDuplicateREQFailed), SSMFIELD_ENTRY_IGNORE( PATM, StatDuplicateUseExisting), SSMFIELD_ENTRY_IGNORE( PATM, StatFunctionFound), SSMFIELD_ENTRY_IGNORE( PATM, StatFunctionNotFound), SSMFIELD_ENTRY_IGNORE( PATM, StatPatchWrite), SSMFIELD_ENTRY_IGNORE( PATM, StatPatchWriteDetect), SSMFIELD_ENTRY_IGNORE( PATM, StatDirty), SSMFIELD_ENTRY_IGNORE( PATM, StatPushTrap), SSMFIELD_ENTRY_IGNORE( PATM, StatPatchWriteInterpreted), SSMFIELD_ENTRY_IGNORE( PATM, StatPatchWriteInterpretedFailed), SSMFIELD_ENTRY_IGNORE( PATM, StatSysEnter), SSMFIELD_ENTRY_IGNORE( PATM, StatSysExit), SSMFIELD_ENTRY_IGNORE( PATM, StatEmulIret), SSMFIELD_ENTRY_IGNORE( PATM, StatEmulIretFailed), SSMFIELD_ENTRY_IGNORE( PATM, StatInstrDirty), SSMFIELD_ENTRY_IGNORE( PATM, StatInstrDirtyGood), SSMFIELD_ENTRY_IGNORE( PATM, StatInstrDirtyBad), SSMFIELD_ENTRY_IGNORE( PATM, StatPatchPageInserted), SSMFIELD_ENTRY_IGNORE( PATM, StatPatchPageRemoved), SSMFIELD_ENTRY_IGNORE( PATM, StatPatchRefreshSuccess), SSMFIELD_ENTRY_IGNORE( PATM, StatPatchRefreshFailed), SSMFIELD_ENTRY_IGNORE( PATM, StatGenRet), SSMFIELD_ENTRY_IGNORE( PATM, StatGenRetReused), SSMFIELD_ENTRY_IGNORE( PATM, StatGenJump), SSMFIELD_ENTRY_IGNORE( PATM, StatGenCall), SSMFIELD_ENTRY_IGNORE( PATM, StatGenPopf), SSMFIELD_ENTRY_IGNORE( PATM, StatCheckPendingIRQ), SSMFIELD_ENTRY_IGNORE( PATM, StatFunctionLookupReplace), SSMFIELD_ENTRY_IGNORE( PATM, StatFunctionLookupInsert), SSMFIELD_ENTRY_IGNORE( PATM, StatU32FunctionMaxSlotsUsed), SSMFIELD_ENTRY_IGNORE( PATM, Alignment0), SSMFIELD_ENTRY_TERM() }; /** * SSM descriptor table for the PATM structure starting with r86139. */ static SSMFIELD const g_aPatmFields86139[] = { /** @todo there are a bunch more fields here which can be marked as ignored. */ SSMFIELD_ENTRY_IGNORE( PATM, offVM), SSMFIELD_ENTRY_RCPTR( PATM, pPatchMemGC), SSMFIELD_ENTRY_IGN_HCPTR( PATM, pPatchMemHC), SSMFIELD_ENTRY( PATM, cbPatchMem), SSMFIELD_ENTRY( PATM, offPatchMem), SSMFIELD_ENTRY( PATM, fOutOfMemory), SSMFIELD_ENTRY_PAD_HC_AUTO( 3, 3), SSMFIELD_ENTRY( PATM, deltaReloc), SSMFIELD_ENTRY_IGN_HCPTR( PATM, pGCStateHC), SSMFIELD_ENTRY_RCPTR( PATM, pGCStateGC), SSMFIELD_ENTRY_RCPTR( PATM, pGCStackGC), SSMFIELD_ENTRY_IGN_HCPTR( PATM, pGCStackHC), SSMFIELD_ENTRY_RCPTR( PATM, pCPUMCtxGC), SSMFIELD_ENTRY_RCPTR( PATM, pStatsGC), SSMFIELD_ENTRY_IGN_HCPTR( PATM, pStatsHC), SSMFIELD_ENTRY( PATM, uCurrentPatchIdx), SSMFIELD_ENTRY( PATM, ulCallDepth), SSMFIELD_ENTRY( PATM, cPageRecords), SSMFIELD_ENTRY_RCPTR( PATM, pPatchedInstrGCLowest), SSMFIELD_ENTRY_RCPTR( PATM, pPatchedInstrGCHighest), SSMFIELD_ENTRY_RCPTR( PATM, PatchLookupTreeGC), SSMFIELD_ENTRY_IGN_HCPTR( PATM, PatchLookupTreeHC), SSMFIELD_ENTRY_RCPTR( PATM, pfnHelperCallGC), SSMFIELD_ENTRY_RCPTR( PATM, pfnHelperRetGC), SSMFIELD_ENTRY_RCPTR( PATM, pfnHelperJumpGC), SSMFIELD_ENTRY_RCPTR( PATM, pfnHelperIretGC), SSMFIELD_ENTRY_IGN_HCPTR( PATM, pGlobalPatchRec), SSMFIELD_ENTRY_RCPTR( PATM, pfnSysEnterGC), SSMFIELD_ENTRY_RCPTR( PATM, pfnSysEnterPatchGC), SSMFIELD_ENTRY( PATM, uSysEnterPatchIdx), SSMFIELD_ENTRY_RCPTR( PATM, pvFaultMonitor), SSMFIELD_ENTRY_GCPHYS( PATM, mmio.GCPhys), SSMFIELD_ENTRY_RCPTR( PATM, mmio.pCachedData), SSMFIELD_ENTRY_IGN_RCPTR( PATM, mmio.Alignment0), SSMFIELD_ENTRY_IGN_HCPTR( PATM, savedstate.pSSM), SSMFIELD_ENTRY( PATM, savedstate.cPatches), SSMFIELD_ENTRY_PAD_HC64( PATM, savedstate.Alignment0, sizeof(uint32_t)), SSMFIELD_ENTRY_IGN_HCPTR( PATM, hDbgModPatchMem), SSMFIELD_ENTRY_PAD_HC32( PATM, Alignment0, sizeof(uint32_t)), SSMFIELD_ENTRY_IGNORE( PATM, StatNrOpcodeRead), SSMFIELD_ENTRY_IGNORE( PATM, StatDisabled), SSMFIELD_ENTRY_IGNORE( PATM, StatUnusable), SSMFIELD_ENTRY_IGNORE( PATM, StatEnabled), SSMFIELD_ENTRY_IGNORE( PATM, StatInstalled), SSMFIELD_ENTRY_IGNORE( PATM, StatInstalledFunctionPatches), SSMFIELD_ENTRY_IGNORE( PATM, StatInstalledTrampoline), SSMFIELD_ENTRY_IGNORE( PATM, StatInstalledJump), SSMFIELD_ENTRY_IGNORE( PATM, StatInt3Callable), SSMFIELD_ENTRY_IGNORE( PATM, StatInt3BlockRun), SSMFIELD_ENTRY_IGNORE( PATM, StatOverwritten), SSMFIELD_ENTRY_IGNORE( PATM, StatFixedConflicts), SSMFIELD_ENTRY_IGNORE( PATM, StatFlushed), SSMFIELD_ENTRY_IGNORE( PATM, StatPageBoundaryCrossed), SSMFIELD_ENTRY_IGNORE( PATM, StatMonitored), SSMFIELD_ENTRY_IGNORE( PATM, StatHandleTrap), SSMFIELD_ENTRY_IGNORE( PATM, StatSwitchBack), SSMFIELD_ENTRY_IGNORE( PATM, StatSwitchBackFail), SSMFIELD_ENTRY_IGNORE( PATM, StatPATMMemoryUsed), SSMFIELD_ENTRY_IGNORE( PATM, StatDuplicateREQSuccess), SSMFIELD_ENTRY_IGNORE( PATM, StatDuplicateREQFailed), SSMFIELD_ENTRY_IGNORE( PATM, StatDuplicateUseExisting), SSMFIELD_ENTRY_IGNORE( PATM, StatFunctionFound), SSMFIELD_ENTRY_IGNORE( PATM, StatFunctionNotFound), SSMFIELD_ENTRY_IGNORE( PATM, StatPatchWrite), SSMFIELD_ENTRY_IGNORE( PATM, StatPatchWriteDetect), SSMFIELD_ENTRY_IGNORE( PATM, StatDirty), SSMFIELD_ENTRY_IGNORE( PATM, StatPushTrap), SSMFIELD_ENTRY_IGNORE( PATM, StatPatchWriteInterpreted), SSMFIELD_ENTRY_IGNORE( PATM, StatPatchWriteInterpretedFailed), SSMFIELD_ENTRY_IGNORE( PATM, StatSysEnter), SSMFIELD_ENTRY_IGNORE( PATM, StatSysExit), SSMFIELD_ENTRY_IGNORE( PATM, StatEmulIret), SSMFIELD_ENTRY_IGNORE( PATM, StatEmulIretFailed), SSMFIELD_ENTRY_IGNORE( PATM, StatInstrDirty), SSMFIELD_ENTRY_IGNORE( PATM, StatInstrDirtyGood), SSMFIELD_ENTRY_IGNORE( PATM, StatInstrDirtyBad), SSMFIELD_ENTRY_IGNORE( PATM, StatPatchPageInserted), SSMFIELD_ENTRY_IGNORE( PATM, StatPatchPageRemoved), SSMFIELD_ENTRY_IGNORE( PATM, StatPatchRefreshSuccess), SSMFIELD_ENTRY_IGNORE( PATM, StatPatchRefreshFailed), SSMFIELD_ENTRY_IGNORE( PATM, StatGenRet), SSMFIELD_ENTRY_IGNORE( PATM, StatGenRetReused), SSMFIELD_ENTRY_IGNORE( PATM, StatGenJump), SSMFIELD_ENTRY_IGNORE( PATM, StatGenCall), SSMFIELD_ENTRY_IGNORE( PATM, StatGenPopf), SSMFIELD_ENTRY_IGNORE( PATM, StatCheckPendingIRQ), SSMFIELD_ENTRY_IGNORE( PATM, StatFunctionLookupReplace), SSMFIELD_ENTRY_IGNORE( PATM, StatFunctionLookupInsert), SSMFIELD_ENTRY_IGNORE( PATM, StatU32FunctionMaxSlotsUsed), SSMFIELD_ENTRY_IGNORE( PATM, Alignment0), SSMFIELD_ENTRY_TERM() }; /** * SSM descriptor table for the PATMGCSTATE structure. */ static SSMFIELD const g_aPatmGCStateFields[] = { SSMFIELD_ENTRY( PATMGCSTATE, uVMFlags), SSMFIELD_ENTRY( PATMGCSTATE, uPendingAction), SSMFIELD_ENTRY( PATMGCSTATE, uPatchCalls), SSMFIELD_ENTRY( PATMGCSTATE, uScratch), SSMFIELD_ENTRY( PATMGCSTATE, uIretEFlags), SSMFIELD_ENTRY( PATMGCSTATE, uIretCS), SSMFIELD_ENTRY( PATMGCSTATE, uIretEIP), SSMFIELD_ENTRY( PATMGCSTATE, Psp), SSMFIELD_ENTRY( PATMGCSTATE, fPIF), SSMFIELD_ENTRY_RCPTR( PATMGCSTATE, GCPtrInhibitInterrupts), SSMFIELD_ENTRY_RCPTR( PATMGCSTATE, GCCallPatchTargetAddr), SSMFIELD_ENTRY_RCPTR( PATMGCSTATE, GCCallReturnAddr), SSMFIELD_ENTRY( PATMGCSTATE, Restore.uEAX), SSMFIELD_ENTRY( PATMGCSTATE, Restore.uECX), SSMFIELD_ENTRY( PATMGCSTATE, Restore.uEDI), SSMFIELD_ENTRY( PATMGCSTATE, Restore.eFlags), SSMFIELD_ENTRY( PATMGCSTATE, Restore.uFlags), SSMFIELD_ENTRY_TERM() }; /** * SSM descriptor table for the PATMPATCHREC structure. */ static SSMFIELD const g_aPatmPatchRecFields[] = { SSMFIELD_ENTRY( PATMPATCHRECSSM, Core.Key), SSMFIELD_ENTRY_IGNORE( PATMPATCHRECSSM, Core.pLeft), SSMFIELD_ENTRY_IGNORE( PATMPATCHRECSSM, Core.pRight), SSMFIELD_ENTRY_IGNORE( PATMPATCHRECSSM, Core.uchHeight), SSMFIELD_ENTRY_PAD_HC_AUTO( 3, 3), SSMFIELD_ENTRY( PATMPATCHRECSSM, CoreOffset.Key), SSMFIELD_ENTRY_IGNORE( PATMPATCHRECSSM, CoreOffset.pLeft), SSMFIELD_ENTRY_IGNORE( PATMPATCHRECSSM, CoreOffset.pRight), SSMFIELD_ENTRY_IGNORE( PATMPATCHRECSSM, CoreOffset.uchHeight), SSMFIELD_ENTRY_PAD_HC_AUTO( 3, 3), SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.uState), SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.uOldState), SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.uOpMode), SSMFIELD_ENTRY_RCPTR( PATMPATCHRECSSM, patch.pPrivInstrGC), SSMFIELD_ENTRY_IGN_HCPTR( PATMPATCHRECSSM, patch.unusedHC), SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.aPrivInstr), SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.cbPrivInstr), SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.opcode), SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.cbPatchJump), SSMFIELD_ENTRY_RCPTR( PATMPATCHRECSSM, patch.pPatchJumpDestGC), SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.pPatchBlockOffset), SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.cbPatchBlockSize), SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.uCurPatchOffset), SSMFIELD_ENTRY_PAD_HC64( PATMPATCHRECSSM, patch.Alignment0, sizeof(uint32_t)), SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.flags), SSMFIELD_ENTRY_RCPTR( PATMPATCHRECSSM, patch.pInstrGCLowest), SSMFIELD_ENTRY_RCPTR( PATMPATCHRECSSM, patch.pInstrGCHighest), SSMFIELD_ENTRY_IGN_HCPTR( PATMPATCHRECSSM, patch.FixupTree), SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.nrFixups), SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.nrJumpRecs), // should be zero? SSMFIELD_ENTRY_IGN_HCPTR( PATMPATCHRECSSM, patch.JumpTree), SSMFIELD_ENTRY_IGN_HCPTR( PATMPATCHRECSSM, patch.Patch2GuestAddrTree), SSMFIELD_ENTRY_IGN_HCPTR( PATMPATCHRECSSM, patch.Guest2PatchAddrTree), SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.nrPatch2GuestRecs), SSMFIELD_ENTRY_PAD_HC64( PATMPATCHRECSSM, patch.Alignment1, sizeof(uint32_t)), SSMFIELD_ENTRY_IGN_HCPTR( PATMPATCHRECSSM, patch.unused.pPatchLocStartHC), // saved as zero SSMFIELD_ENTRY_IGN_HCPTR( PATMPATCHRECSSM, patch.unused.pPatchLocEndHC), // ditto SSMFIELD_ENTRY_IGN_RCPTR( PATMPATCHRECSSM, patch.unused.pGuestLoc), // ditto SSMFIELD_ENTRY_IGNORE( PATMPATCHRECSSM, patch.unused.opsize), // ditto SSMFIELD_ENTRY_IGN_HCPTR( PATMPATCHRECSSM, patch.pTempInfo), SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.cCodeWrites), SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.cTraps), SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.cInvalidWrites), SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.uPatchIdx), SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.bDirtyOpcode), SSMFIELD_ENTRY_IGNORE( PATMPATCHRECSSM, patch.Alignment2), SSMFIELD_ENTRY_TERM() }; /** * SSM descriptor table for the RELOCREC structure. */ static SSMFIELD const g_aPatmRelocRec[] = { SSMFIELD_ENTRY_HCPTR_HACK_U32( RELOCREC, Core.Key), // Used to store the relocation type SSMFIELD_ENTRY_IGN_HCPTR( RELOCREC, Core.pLeft), SSMFIELD_ENTRY_IGN_HCPTR( RELOCREC, Core.pRight), SSMFIELD_ENTRY_IGNORE( RELOCREC, Core.uchHeight), SSMFIELD_ENTRY_PAD_HC_AUTO( 3, 7), SSMFIELD_ENTRY( RELOCREC, uType), SSMFIELD_ENTRY_PAD_HC_AUTO( 0, 4), SSMFIELD_ENTRY_HCPTR_HACK_U32( RELOCREC, pRelocPos), // converted to a patch member offset. SSMFIELD_ENTRY_RCPTR( RELOCREC, pSource), SSMFIELD_ENTRY_RCPTR( RELOCREC, pDest), SSMFIELD_ENTRY_TERM() }; /** * SSM descriptor table for the RECPATCHTOGUEST structure. */ static SSMFIELD const g_aPatmRecPatchToGuest[] = { SSMFIELD_ENTRY( RECPATCHTOGUEST, Core.Key), SSMFIELD_ENTRY_PAD_HC_AUTO( 0, 4), SSMFIELD_ENTRY_IGN_HCPTR( RECPATCHTOGUEST, Core.pLeft), SSMFIELD_ENTRY_IGN_HCPTR( RECPATCHTOGUEST, Core.pRight), SSMFIELD_ENTRY_IGNORE( RECPATCHTOGUEST, Core.uchHeight), SSMFIELD_ENTRY_PAD_HC_AUTO( 3, 7), SSMFIELD_ENTRY_RCPTR( RECPATCHTOGUEST, pOrgInstrGC), SSMFIELD_ENTRY( RECPATCHTOGUEST, enmType), SSMFIELD_ENTRY( RECPATCHTOGUEST, fDirty), SSMFIELD_ENTRY( RECPATCHTOGUEST, fJumpTarget), SSMFIELD_ENTRY( RECPATCHTOGUEST, u8DirtyOpcode), SSMFIELD_ENTRY_PAD_HC_AUTO( 1, 5), SSMFIELD_ENTRY_TERM() }; #ifdef VBOX_STRICT /** * Callback function for RTAvlPVDoWithAll * * Counts the number of patches in the tree * * @returns VBox status code. * @param pNode Current node * @param pcPatches Pointer to patch counter (uint32_t) */ static DECLCALLBACK(int) patmCountLeafPV(PAVLPVNODECORE pNode, void *pcPatches) { NOREF(pNode); *(uint32_t *)pcPatches = *(uint32_t *)pcPatches + 1; return VINF_SUCCESS; } /** * Callback function for RTAvlU32DoWithAll * * Counts the number of patches in the tree * * @returns VBox status code. * @param pNode Current node * @param pcPatches Pointer to patch counter (uint32_t) */ static DECLCALLBACK(int) patmCountLeaf(PAVLU32NODECORE pNode, void *pcPatches) { NOREF(pNode); *(uint32_t *)pcPatches = *(uint32_t *)pcPatches + 1; return VINF_SUCCESS; } #endif /* VBOX_STRICT */ /** * Callback function for RTAvloU32DoWithAll * * Counts the number of patches in the tree * * @returns VBox status code. * @param pNode Current node * @param pcPatches Pointer to patch counter */ static DECLCALLBACK(int) patmCountPatch(PAVLOU32NODECORE pNode, void *pcPatches) { NOREF(pNode); *(uint32_t *)pcPatches = *(uint32_t *)pcPatches + 1; return VINF_SUCCESS; } /** * Callback function for RTAvlU32DoWithAll * * Saves all patch to guest lookup records. * * @returns VBox status code. * @param pNode Current node * @param pvUser Pointer to PATMCALLBACKARGS. */ static DECLCALLBACK(int) patmSaveP2GLookupRecords(PAVLU32NODECORE pNode, void *pvUser) { PPATMCALLBACKARGS pArgs = (PPATMCALLBACKARGS)pvUser; PRECPATCHTOGUEST pPatchToGuestRec = (PRECPATCHTOGUEST)pNode; /* Save the lookup record. */ int rc = SSMR3PutStructEx(pArgs->pSSM, pPatchToGuestRec, sizeof(RECPATCHTOGUEST), 0 /*fFlags*/, &g_aPatmRecPatchToGuest[0], NULL); AssertRCReturn(rc, rc); return VINF_SUCCESS; } /** * Callback function for RTAvlPVDoWithAll * * Saves all patch to guest lookup records. * * @returns VBox status code. * @param pNode Current node * @param pvUser Pointer to PATMCALLBACKARGS. */ static DECLCALLBACK(int) patmSaveFixupRecords(PAVLPVNODECORE pNode, void *pvUser) { PPATMCALLBACKARGS pArgs = (PPATMCALLBACKARGS)pvUser; RELOCREC rec = *(PRELOCREC)pNode; /* Convert pointer to an offset into patch memory. May not be applicable to all fixup types, thus the UINT32_MAX. */ AssertMsg( rec.pRelocPos || ( rec.uType == FIXUP_REL_JMPTOPATCH && !(pArgs->pPatchRec->patch.flags & PATMFL_PATCHED_GUEST_CODE)), ("uState=%#x uType=%#x flags=%#RX64\n", pArgs->pPatchRec->patch.uState, rec.uType, pArgs->pPatchRec->patch.flags)); uintptr_t offRelocPos = (uintptr_t)rec.pRelocPos - (uintptr_t)pArgs->pVM->patm.s.pPatchMemHC; if (offRelocPos > pArgs->pVM->patm.s.cbPatchMem) offRelocPos = UINT32_MAX; rec.pRelocPos = (uint8_t *)offRelocPos; /* Zero rec.Core.Key since it's unused and may trigger SSM check due to the hack below. */ rec.Core.Key = 0; /* Save the lookup record. */ int rc = SSMR3PutStructEx(pArgs->pSSM, &rec, sizeof(rec), 0 /*fFlags*/, &g_aPatmRelocRec[0], NULL); AssertRCReturn(rc, rc); return VINF_SUCCESS; } /** * Converts a saved state patch record to the memory record. * * @returns nothing. * @param pPatch The memory record. * @param pPatchSSM The SSM version of the patch record. */ static void patmR3PatchConvertSSM2Mem(PPATMPATCHREC pPatch, PPATMPATCHRECSSM pPatchSSM) { /* * Only restore the patch part of the tree record; not the internal data (except the key of course) */ pPatch->Core.Key = pPatchSSM->Core.Key; pPatch->CoreOffset.Key = pPatchSSM->CoreOffset.Key; pPatch->patch.uState = pPatchSSM->patch.uState; pPatch->patch.uOldState = pPatchSSM->patch.uOldState; pPatch->patch.uOpMode = pPatchSSM->patch.uOpMode; pPatch->patch.pPrivInstrGC = pPatchSSM->patch.pPrivInstrGC; pPatch->patch.unusedHC = pPatchSSM->patch.unusedHC; memcpy(&pPatch->patch.aPrivInstr[0], &pPatchSSM->patch.aPrivInstr[0], MAX_INSTR_SIZE); pPatch->patch.cbPrivInstr = pPatchSSM->patch.cbPrivInstr; pPatch->patch.opcode = pPatchSSM->patch.opcode; pPatch->patch.cbPatchJump = pPatchSSM->patch.cbPatchJump; pPatch->patch.pPatchJumpDestGC = pPatchSSM->patch.pPatchJumpDestGC; pPatch->patch.pPatchBlockOffset = pPatchSSM->patch.pPatchBlockOffset; pPatch->patch.cbPatchBlockSize = pPatchSSM->patch.cbPatchBlockSize; pPatch->patch.uCurPatchOffset = pPatchSSM->patch.uCurPatchOffset; pPatch->patch.flags = pPatchSSM->patch.flags; pPatch->patch.pInstrGCLowest = pPatchSSM->patch.pInstrGCLowest; pPatch->patch.pInstrGCHighest = pPatchSSM->patch.pInstrGCHighest; pPatch->patch.FixupTree = pPatchSSM->patch.FixupTree; pPatch->patch.nrFixups = pPatchSSM->patch.nrFixups; pPatch->patch.nrJumpRecs = pPatchSSM->patch.nrJumpRecs; pPatch->patch.JumpTree = pPatchSSM->patch.JumpTree; pPatch->patch.Patch2GuestAddrTree = pPatchSSM->patch.Patch2GuestAddrTree; pPatch->patch.Guest2PatchAddrTree = pPatchSSM->patch.Guest2PatchAddrTree; pPatch->patch.nrPatch2GuestRecs = pPatchSSM->patch.nrPatch2GuestRecs; pPatch->patch.unused = pPatchSSM->patch.unused; pPatch->patch.pTempInfo = pPatchSSM->patch.pTempInfo; pPatch->patch.cCodeWrites = pPatchSSM->patch.cCodeWrites; pPatch->patch.cTraps = pPatchSSM->patch.cTraps; pPatch->patch.cInvalidWrites = pPatchSSM->patch.cInvalidWrites; pPatch->patch.uPatchIdx = pPatchSSM->patch.uPatchIdx; pPatch->patch.bDirtyOpcode = pPatchSSM->patch.bDirtyOpcode; pPatch->patch.pTrampolinePatchesHead = NULL; } /** * Converts a memory patch record to the saved state version. * * @returns nothing. * @param pPatchSSM The saved state record. * @param pPatch The memory version to save. */ static void patmR3PatchConvertMem2SSM(PPATMPATCHRECSSM pPatchSSM, PPATMPATCHREC pPatch) { pPatchSSM->Core = pPatch->Core; pPatchSSM->CoreOffset = pPatch->CoreOffset; pPatchSSM->patch.uState = pPatch->patch.uState; pPatchSSM->patch.uOldState = pPatch->patch.uOldState; pPatchSSM->patch.uOpMode = pPatch->patch.uOpMode; pPatchSSM->patch.pPrivInstrGC = pPatch->patch.pPrivInstrGC; pPatchSSM->patch.unusedHC = pPatch->patch.unusedHC; memcpy(&pPatchSSM->patch.aPrivInstr[0], &pPatch->patch.aPrivInstr[0], MAX_INSTR_SIZE); pPatchSSM->patch.cbPrivInstr = pPatch->patch.cbPrivInstr; pPatchSSM->patch.opcode = pPatch->patch.opcode; pPatchSSM->patch.cbPatchJump = pPatch->patch.cbPatchJump; pPatchSSM->patch.pPatchJumpDestGC = pPatch->patch.pPatchJumpDestGC; pPatchSSM->patch.pPatchBlockOffset = pPatch->patch.pPatchBlockOffset; pPatchSSM->patch.cbPatchBlockSize = pPatch->patch.cbPatchBlockSize; pPatchSSM->patch.uCurPatchOffset = pPatch->patch.uCurPatchOffset; pPatchSSM->patch.flags = pPatch->patch.flags; pPatchSSM->patch.pInstrGCLowest = pPatch->patch.pInstrGCLowest; pPatchSSM->patch.pInstrGCHighest = pPatch->patch.pInstrGCHighest; pPatchSSM->patch.FixupTree = pPatch->patch.FixupTree; pPatchSSM->patch.nrFixups = pPatch->patch.nrFixups; pPatchSSM->patch.nrJumpRecs = pPatch->patch.nrJumpRecs; pPatchSSM->patch.JumpTree = pPatch->patch.JumpTree; pPatchSSM->patch.Patch2GuestAddrTree = pPatch->patch.Patch2GuestAddrTree; pPatchSSM->patch.Guest2PatchAddrTree = pPatch->patch.Guest2PatchAddrTree; pPatchSSM->patch.nrPatch2GuestRecs = pPatch->patch.nrPatch2GuestRecs; pPatchSSM->patch.unused = pPatch->patch.unused; pPatchSSM->patch.pTempInfo = pPatch->patch.pTempInfo; pPatchSSM->patch.cCodeWrites = pPatch->patch.cCodeWrites; pPatchSSM->patch.cTraps = pPatch->patch.cTraps; pPatchSSM->patch.cInvalidWrites = pPatch->patch.cInvalidWrites; pPatchSSM->patch.uPatchIdx = pPatch->patch.uPatchIdx; pPatchSSM->patch.bDirtyOpcode = pPatch->patch.bDirtyOpcode; } /** * Callback function for RTAvloU32DoWithAll * * Saves the state of the patch that's being enumerated * * @returns VBox status code. * @param pNode Current node * @param pvUser Pointer to PATMCALLBACKARGS. */ static DECLCALLBACK(int) patmSavePatchState(PAVLOU32NODECORE pNode, void *pvUser) { PPATMCALLBACKARGS pArgs = (PPATMCALLBACKARGS)pvUser; PPATMPATCHREC pPatch = (PPATMPATCHREC)pNode; PATMPATCHRECSSM patch; int rc; pArgs->pPatchRec = pPatch; Assert(!(pPatch->patch.flags & PATMFL_GLOBAL_FUNCTIONS)); patmR3PatchConvertMem2SSM(&patch, pPatch); Log4(("patmSavePatchState: cbPatchJump=%u uCurPathOffset=%#x pInstrGCLowest/Higest=%#x/%#x nrFixups=%#x nrJumpRecs=%#x\n", patch.patch.cbPatchJump, patch.patch.uCurPatchOffset, patch.patch.pInstrGCLowest, patch.patch.pInstrGCHighest, patch.patch.nrFixups, patch.patch.nrJumpRecs)); /* * Reset HC pointers that need to be recalculated when loading the state */ #ifdef VBOX_STRICT PVM pVM = pArgs->pVM; /* For PATCHCODE_PTR_HC. */ AssertMsg(patch.patch.uState == PATCH_REFUSED || (patch.patch.pPatchBlockOffset || (patch.patch.flags & (PATMFL_SYSENTER_XP|PATMFL_INT3_REPLACEMENT))), ("State = %x pPatchBlockHC=%08x flags=%x\n", patch.patch.uState, PATCHCODE_PTR_HC(&patch.patch), patch.patch.flags)); #endif Assert(pPatch->patch.JumpTree == 0); Assert(!pPatch->patch.pTempInfo || pPatch->patch.pTempInfo->DisasmJumpTree == 0); Assert(!pPatch->patch.pTempInfo || pPatch->patch.pTempInfo->IllegalInstrTree == 0); /* Save the patch record itself */ rc = SSMR3PutStructEx(pArgs->pSSM, &patch, sizeof(patch), 0 /*fFlags*/, &g_aPatmPatchRecFields[0], NULL); AssertRCReturn(rc, rc); /* * Reset HC pointers in fixup records and save them. */ #ifdef VBOX_STRICT uint32_t nrFixupRecs = 0; RTAvlPVDoWithAll(&pPatch->patch.FixupTree, true, patmCountLeafPV, &nrFixupRecs); AssertMsg(nrFixupRecs == pPatch->patch.nrFixups, ("Fixup inconsistency! counted %d vs %d\n", nrFixupRecs, pPatch->patch.nrFixups)); #endif rc = RTAvlPVDoWithAll(&pPatch->patch.FixupTree, true, patmSaveFixupRecords, pArgs); AssertRCReturn(rc, rc); #ifdef VBOX_STRICT uint32_t nrLookupRecords = 0; RTAvlU32DoWithAll(&pPatch->patch.Patch2GuestAddrTree, true, patmCountLeaf, &nrLookupRecords); Assert(nrLookupRecords == pPatch->patch.nrPatch2GuestRecs); #endif rc = RTAvlU32DoWithAll(&pPatch->patch.Patch2GuestAddrTree, true, patmSaveP2GLookupRecords, pArgs); AssertRCReturn(rc, rc); pArgs->pPatchRec = NULL; return VINF_SUCCESS; } /** * Execute state save operation. * * @returns VBox status code. * @param pVM The cross context VM structure. * @param pSSM SSM operation handle. */ DECLCALLBACK(int) patmR3Save(PVM pVM, PSSMHANDLE pSSM) { PATM patmInfo = pVM->patm.s; int rc; pVM->patm.s.savedstate.pSSM = pSSM; /* * Reset HC pointers that need to be recalculated when loading the state */ patmInfo.pPatchMemHC = NULL; patmInfo.pGCStateHC = 0; patmInfo.pvFaultMonitor = 0; Assert(patmInfo.ulCallDepth == 0); /* * Count the number of patches in the tree (feeling lazy) */ patmInfo.savedstate.cPatches = 0; RTAvloU32DoWithAll(&pVM->patm.s.PatchLookupTreeHC->PatchTree, true, patmCountPatch, &patmInfo.savedstate.cPatches); /* * Save PATM structure */ rc = SSMR3PutStructEx(pSSM, &patmInfo, sizeof(patmInfo), 0 /*fFlags*/, &g_aPatmFields[0], NULL); AssertRCReturn(rc, rc); /* * Save patch memory contents */ rc = SSMR3PutMem(pSSM, pVM->patm.s.pPatchMemHC, pVM->patm.s.cbPatchMem); AssertRCReturn(rc, rc); /* * Save GC state memory */ rc = SSMR3PutStructEx(pSSM, pVM->patm.s.pGCStateHC, sizeof(PATMGCSTATE), 0 /*fFlags*/, &g_aPatmGCStateFields[0], NULL); AssertRCReturn(rc, rc); /* * Save PATM stack page */ SSMR3PutU32(pSSM, PATM_STACK_TOTAL_SIZE); rc = SSMR3PutMem(pSSM, pVM->patm.s.pGCStackHC, PATM_STACK_TOTAL_SIZE); AssertRCReturn(rc, rc); /* * Save all patches */ PATMCALLBACKARGS Args; Args.pVM = pVM; Args.pSSM = pSSM; rc = RTAvloU32DoWithAll(&pVM->patm.s.PatchLookupTreeHC->PatchTree, true, patmSavePatchState, &Args); AssertRCReturn(rc, rc); /* Note! Patch statistics are not saved. */ return VINF_SUCCESS; } /** * Execute state load operation. * * @returns VBox status code. * @param pVM The cross context VM structure. * @param pSSM SSM operation handle. * @param uVersion Data layout version. * @param uPass The data pass. */ DECLCALLBACK(int) patmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass) { PATM patmInfo; int rc; if ( uVersion != PATM_SAVED_STATE_VERSION && uVersion != PATM_SAVED_STATE_VERSION_NO_RAW_MEM && uVersion != PATM_SAVED_STATE_VERSION_MEM && uVersion != PATM_SAVED_STATE_VERSION_FIXUP_HACK && uVersion != PATM_SAVED_STATE_VERSION_VER16 ) { AssertMsgFailed(("patmR3Load: Invalid version uVersion=%d!\n", uVersion)); return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION; } uint32_t const fStructRestoreFlags = uVersion <= PATM_SAVED_STATE_VERSION_MEM ? SSMSTRUCT_FLAGS_MEM_BAND_AID_RELAXED : 0; Assert(uPass == SSM_PASS_FINAL); NOREF(uPass); pVM->patm.s.savedstate.pSSM = pSSM; /* * Restore PATM structure */ RT_ZERO(patmInfo); if ( uVersion == PATM_SAVED_STATE_VERSION_MEM && SSMR3HandleRevision(pSSM) >= 86139 && SSMR3HandleVersion(pSSM) >= VBOX_FULL_VERSION_MAKE(4, 2, 51)) rc = SSMR3GetStructEx(pSSM, &patmInfo, sizeof(patmInfo), SSMSTRUCT_FLAGS_MEM_BAND_AID_RELAXED, &g_aPatmFields86139[0], NULL); else rc = SSMR3GetStructEx(pSSM, &patmInfo, sizeof(patmInfo), fStructRestoreFlags, &g_aPatmFields[0], NULL); AssertRCReturn(rc, rc); /* Relative calls are made to the helper functions. Therefor their relative location must not change! */ /* Note: we reuse the saved global helpers and assume they are identical, which is kind of dangerous. */ AssertLogRelReturn((pVM->patm.s.pfnHelperCallGC - pVM->patm.s.pPatchMemGC) == (patmInfo.pfnHelperCallGC - patmInfo.pPatchMemGC), VERR_SSM_DATA_UNIT_FORMAT_CHANGED); AssertLogRelReturn((pVM->patm.s.pfnHelperRetGC - pVM->patm.s.pPatchMemGC) == (patmInfo.pfnHelperRetGC - patmInfo.pPatchMemGC), VERR_SSM_DATA_UNIT_FORMAT_CHANGED); AssertLogRelReturn((pVM->patm.s.pfnHelperJumpGC - pVM->patm.s.pPatchMemGC) == (patmInfo.pfnHelperJumpGC - patmInfo.pPatchMemGC), VERR_SSM_DATA_UNIT_FORMAT_CHANGED); AssertLogRelReturn((pVM->patm.s.pfnHelperIretGC - pVM->patm.s.pPatchMemGC) == (patmInfo.pfnHelperIretGC - patmInfo.pPatchMemGC), VERR_SSM_DATA_UNIT_FORMAT_CHANGED); AssertLogRelReturn(pVM->patm.s.cbPatchMem == patmInfo.cbPatchMem, VERR_SSM_DATA_UNIT_FORMAT_CHANGED); pVM->patm.s.offPatchMem = patmInfo.offPatchMem; pVM->patm.s.deltaReloc = patmInfo.deltaReloc; pVM->patm.s.uCurrentPatchIdx = patmInfo.uCurrentPatchIdx; pVM->patm.s.fOutOfMemory = patmInfo.fOutOfMemory; /* Lowest and highest patched instruction */ pVM->patm.s.pPatchedInstrGCLowest = patmInfo.pPatchedInstrGCLowest; pVM->patm.s.pPatchedInstrGCHighest = patmInfo.pPatchedInstrGCHighest; /* Sysenter handlers */ pVM->patm.s.pfnSysEnterGC = patmInfo.pfnSysEnterGC; pVM->patm.s.pfnSysEnterPatchGC = patmInfo.pfnSysEnterPatchGC; pVM->patm.s.uSysEnterPatchIdx = patmInfo.uSysEnterPatchIdx; Assert(patmInfo.ulCallDepth == 0 && pVM->patm.s.ulCallDepth == 0); Log(("pPatchMemGC %RRv vs old %RRv\n", pVM->patm.s.pPatchMemGC, patmInfo.pPatchMemGC)); Log(("pGCStateGC %RRv vs old %RRv\n", pVM->patm.s.pGCStateGC, patmInfo.pGCStateGC)); Log(("pGCStackGC %RRv vs old %RRv\n", pVM->patm.s.pGCStackGC, patmInfo.pGCStackGC)); Log(("pCPUMCtxGC %RRv vs old %RRv\n", pVM->patm.s.pCPUMCtxGC, patmInfo.pCPUMCtxGC)); /** @note patch statistics are not restored. */ /* * Restore patch memory contents */ Log(("Restore patch memory: new %RRv old %RRv\n", pVM->patm.s.pPatchMemGC, patmInfo.pPatchMemGC)); rc = SSMR3GetMem(pSSM, pVM->patm.s.pPatchMemHC, pVM->patm.s.cbPatchMem); AssertRCReturn(rc, rc); /* * Restore GC state memory */ RT_BZERO(pVM->patm.s.pGCStateHC, sizeof(PATMGCSTATE)); rc = SSMR3GetStructEx(pSSM, pVM->patm.s.pGCStateHC, sizeof(PATMGCSTATE), fStructRestoreFlags, &g_aPatmGCStateFields[0], NULL); AssertRCReturn(rc, rc); /* * Restore PATM stack page */ uint32_t cbStack = PATM_STACK_TOTAL_SIZE; if (uVersion > PATM_SAVED_STATE_VERSION_MEM) { rc = SSMR3GetU32(pSSM, &cbStack); AssertRCReturn(rc, rc); } AssertCompile(!(PATM_STACK_TOTAL_SIZE & 31)); AssertLogRelMsgReturn(cbStack > 0 && cbStack <= PATM_STACK_TOTAL_SIZE && !(cbStack & 31), ("cbStack=%#x vs %#x", cbStack, PATM_STACK_TOTAL_SIZE), VERR_SSM_DATA_UNIT_FORMAT_CHANGED); rc = SSMR3GetMem(pSSM, pVM->patm.s.pGCStackHC, cbStack); AssertRCReturn(rc, rc); if (cbStack < PATM_STACK_TOTAL_SIZE) memset((uint8_t *)pVM->patm.s.pGCStackHC + cbStack, 0, PATM_STACK_TOTAL_SIZE - cbStack); /* * Load all patches */ for (unsigned i = 0; i < patmInfo.savedstate.cPatches; i++) { PATMPATCHRECSSM patch; PATMPATCHREC *pPatchRec; RT_ZERO(patch); rc = SSMR3GetStructEx(pSSM, &patch, sizeof(patch), fStructRestoreFlags, &g_aPatmPatchRecFields[0], NULL); AssertRCReturn(rc, rc); Log4(("patmR3Load: cbPatchJump=%u uCurPathOffset=%#x pInstrGCLowest/Higest=%#x/%#x nrFixups=%#x nrJumpRecs=%#x\n", patch.patch.cbPatchJump, patch.patch.uCurPatchOffset, patch.patch.pInstrGCLowest, patch.patch.pInstrGCHighest, patch.patch.nrFixups, patch.patch.nrJumpRecs)); Assert(!(patch.patch.flags & PATMFL_GLOBAL_FUNCTIONS)); rc = MMHyperAlloc(pVM, sizeof(PATMPATCHREC), 0, MM_TAG_PATM_PATCH, (void **)&pPatchRec); if (RT_FAILURE(rc)) { AssertMsgFailed(("Out of memory!!!!\n")); return VERR_NO_MEMORY; } /* Convert SSM version to memory. */ patmR3PatchConvertSSM2Mem(pPatchRec, &patch); Log(("Restoring patch %RRv -> %RRv state %x\n", pPatchRec->patch.pPrivInstrGC, patmInfo.pPatchMemGC + pPatchRec->patch.pPatchBlockOffset, pPatchRec->patch.uState)); bool ret = RTAvloU32Insert(&pVM->patm.s.PatchLookupTreeHC->PatchTree, &pPatchRec->Core); Assert(ret); if (pPatchRec->patch.uState != PATCH_REFUSED) { if (pPatchRec->patch.pPatchBlockOffset) { /* We actually generated code for this patch. */ ret = RTAvloU32Insert(&pVM->patm.s.PatchLookupTreeHC->PatchTreeByPatchAddr, &pPatchRec->CoreOffset); AssertMsg(ret, ("Inserting patch %RRv offset %08RX32 failed!!\n", pPatchRec->patch.pPrivInstrGC, pPatchRec->CoreOffset.Key)); } } /* Set to zero as we don't need it anymore. */ pPatchRec->patch.pTempInfo = 0; PATMP2GLOOKUPREC cacheRec; RT_ZERO(cacheRec); cacheRec.pPatch = &pPatchRec->patch; uint8_t *pPrivInstrHC = patmR3GCVirtToHCVirt(pVM, &cacheRec, pPatchRec->patch.pPrivInstrGC); /* Can fail due to page or page table not present. */ /* * Restore fixup records and correct HC pointers in fixup records */ pPatchRec->patch.FixupTree = 0; pPatchRec->patch.nrFixups = 0; /* increased by patmPatchAddReloc32 */ for (unsigned j = 0; j < patch.patch.nrFixups; j++) { RELOCREC rec; int32_t offset; RTRCPTR *pFixup; RT_ZERO(rec); rc = SSMR3GetStructEx(pSSM, &rec, sizeof(rec), fStructRestoreFlags, &g_aPatmRelocRec[0], NULL); AssertRCReturn(rc, rc); if (pPrivInstrHC) { /* rec.pRelocPos now contains the relative position inside the hypervisor area. */ offset = (int32_t)(intptr_t)rec.pRelocPos; /* Convert to HC pointer again. */ if ((uintptr_t)rec.pRelocPos < pVM->patm.s.cbPatchMem) rec.pRelocPos = pVM->patm.s.pPatchMemHC + (uintptr_t)rec.pRelocPos; else rec.pRelocPos = NULL; pFixup = (RTRCPTR *)rec.pRelocPos; if (pPatchRec->patch.uState != PATCH_REFUSED) { if ( rec.uType == FIXUP_REL_JMPTOPATCH && (pPatchRec->patch.flags & PATMFL_PATCHED_GUEST_CODE)) { Assert(pPatchRec->patch.cbPatchJump == SIZEOF_NEARJUMP32 || pPatchRec->patch.cbPatchJump == SIZEOF_NEAR_COND_JUMP32); unsigned offset2 = (pPatchRec->patch.cbPatchJump == SIZEOF_NEARJUMP32) ? 1 : 2; rec.pRelocPos = pPrivInstrHC + offset2; pFixup = (RTRCPTR *)rec.pRelocPos; } rc = patmCorrectFixup(pVM, uVersion, patmInfo, &pPatchRec->patch, &rec, offset, pFixup); AssertRCReturn(rc, rc); } rc = patmPatchAddReloc32(pVM, &pPatchRec->patch, rec.pRelocPos, rec.uType, rec.pSource, rec.pDest); AssertRCReturn(rc, rc); } } /* Release previous lock if any. */ if (cacheRec.Lock.pvMap) PGMPhysReleasePageMappingLock(pVM, &cacheRec.Lock); /* And all patch to guest lookup records */ Assert(pPatchRec->patch.nrPatch2GuestRecs || pPatchRec->patch.uState == PATCH_REFUSED || (pPatchRec->patch.flags & (PATMFL_SYSENTER_XP | PATMFL_IDTHANDLER | PATMFL_TRAPHANDLER | PATMFL_INT3_REPLACEMENT))); pPatchRec->patch.Patch2GuestAddrTree = 0; pPatchRec->patch.Guest2PatchAddrTree = 0; if (pPatchRec->patch.nrPatch2GuestRecs) { RECPATCHTOGUEST rec; uint32_t nrPatch2GuestRecs = pPatchRec->patch.nrPatch2GuestRecs; pPatchRec->patch.nrPatch2GuestRecs = 0; /* incremented by patmr3AddP2GLookupRecord */ for (uint32_t j=0;jpatch, (uintptr_t)rec.Core.Key + pVM->patm.s.pPatchMemHC, rec.pOrgInstrGC, rec.enmType, rec.fDirty); } Assert(pPatchRec->patch.Patch2GuestAddrTree); } if (pPatchRec->patch.flags & PATMFL_CODE_MONITORED) { /* Insert the guest page lookup records (for detection self-modifying code) */ rc = patmInsertPatchPages(pVM, &pPatchRec->patch); AssertRCReturn(rc, rc); } #if 0 /* can fail def LOG_ENABLED */ if ( pPatchRec->patch.uState != PATCH_REFUSED && !(pPatchRec->patch.flags & PATMFL_INT3_REPLACEMENT)) { pPatchRec->patch.pTempInfo = (PPATCHINFOTEMP)MMR3HeapAllocZ(pVM, MM_TAG_PATM_PATCH, sizeof(PATCHINFOTEMP)); Log(("Patch code ----------------------------------------------------------\n")); patmr3DisasmCodeStream(pVM, PATCHCODE_PTR_GC(&pPatchRec->patch), PATCHCODE_PTR_GC(&pPatchRec->patch), patmr3DisasmCallback, &pPatchRec->patch); Log(("Patch code ends -----------------------------------------------------\n")); MMR3HeapFree(pPatchRec->patch.pTempInfo); pPatchRec->patch.pTempInfo = NULL; } #endif /* Remove the patch in case the gc mapping is not present. */ if ( !pPrivInstrHC && pPatchRec->patch.uState == PATCH_ENABLED) { Log(("Remove patch %RGv due to failed HC address translation\n", pPatchRec->patch.pPrivInstrGC)); PATMR3RemovePatch(pVM, pPatchRec->patch.pPrivInstrGC); } } /* * Correct absolute fixups in the global patch. (helper functions) * Bit of a mess. Uses the new patch record, but restored patch functions. */ PRELOCREC pRec = 0; AVLPVKEY key = 0; Log(("Correct fixups in global helper functions\n")); while (true) { int32_t offset; RTRCPTR *pFixup; /* Get the record that's closest from above */ pRec = (PRELOCREC)RTAvlPVGetBestFit(&pVM->patm.s.pGlobalPatchRec->patch.FixupTree, key, true); if (pRec == 0) break; key = (AVLPVKEY)(pRec->pRelocPos + 1); /* search for the next record during the next round. */ /* rec.pRelocPos now contains the relative position inside the hypervisor area. */ offset = (int32_t)(pRec->pRelocPos - pVM->patm.s.pPatchMemHC); pFixup = (RTRCPTR *)pRec->pRelocPos; /* Correct fixups that refer to PATM structures in the hypervisor region (their addresses might have changed). */ rc = patmCorrectFixup(pVM, uVersion, patmInfo, &pVM->patm.s.pGlobalPatchRec->patch, pRec, offset, pFixup); AssertRCReturn(rc, rc); } #ifdef VBOX_WITH_STATISTICS /* * Restore relevant old statistics */ pVM->patm.s.StatDisabled = patmInfo.StatDisabled; pVM->patm.s.StatUnusable = patmInfo.StatUnusable; pVM->patm.s.StatEnabled = patmInfo.StatEnabled; pVM->patm.s.StatInstalled = patmInfo.StatInstalled; #endif return VINF_SUCCESS; } /** * Correct fixups to predefined hypervisor PATM regions. (their addresses might have changed) * * @returns VBox status code. * @param pVM The cross context VM structure. * @param uVersion Saved state version. * @param patmInfo Saved PATM structure * @param pPatch Patch record * @param pRec Relocation record * @param offset Offset of referenced data/code * @param pFixup Fixup address */ static int patmCorrectFixup(PVM pVM, unsigned uVersion, PATM &patmInfo, PPATCHINFO pPatch, PRELOCREC pRec, int32_t offset, RTRCPTR *pFixup) { int32_t delta = pVM->patm.s.pPatchMemGC - patmInfo.pPatchMemGC; RT_NOREF1(offset); switch (pRec->uType) { case FIXUP_ABSOLUTE: case FIXUP_ABSOLUTE_IN_PATCH_ASM_TMPL: { Assert( pRec->uType != PATM_SAVED_STATE_VERSION_NO_RAW_MEM || (pRec->pSource == pRec->pDest && PATM_IS_ASMFIX(pRec->pSource)) ); /* bird: What is this for exactly? Only the MMIO fixups used to have pSource set. */ if ( pRec->pSource && !PATMIsPatchGCAddr(pVM, (RTRCUINTPTR)pRec->pSource) && pRec->uType != FIXUP_ABSOLUTE_IN_PATCH_ASM_TMPL) break; RTRCPTR const uFixup = *pFixup; if ( uFixup >= patmInfo.pGCStateGC && uFixup < patmInfo.pGCStateGC + sizeof(PATMGCSTATE)) { LogFlow(("Changing absolute GCState at %RRv from %RRv to %RRv\n", patmInfo.pPatchMemGC + offset, uFixup, (uFixup - patmInfo.pGCStateGC) + pVM->patm.s.pGCStateGC)); *pFixup = (uFixup - patmInfo.pGCStateGC) + pVM->patm.s.pGCStateGC; } else if ( uFixup >= patmInfo.pCPUMCtxGC && uFixup < patmInfo.pCPUMCtxGC + sizeof(CPUMCTX)) { LogFlow(("Changing absolute CPUMCTX at %RRv from %RRv to %RRv\n", patmInfo.pPatchMemGC + offset, uFixup, (uFixup - patmInfo.pCPUMCtxGC) + pVM->patm.s.pCPUMCtxGC)); /* The CPUMCTX structure has completely changed, so correct the offsets too. */ if (uVersion == PATM_SAVED_STATE_VERSION_VER16) { unsigned offCpumCtx = uFixup - patmInfo.pCPUMCtxGC; /* ''case RT_OFFSETOF()'' does not work as gcc refuses to use & as a constant expression. * Defining RT_OFFSETOF as __builtin_offsetof for gcc would make this possible. But this * function is not available in older gcc versions, at least not in gcc-3.3 */ if (offCpumCtx == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, dr0)) { LogFlow(("Changing dr[0] offset from %x to %x\n", offCpumCtx, RT_OFFSETOF(CPUMCTX, dr[0]))); *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr[0]); } else if (offCpumCtx == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, dr1)) { LogFlow(("Changing dr[1] offset from %x to %x\n", offCpumCtx, RT_OFFSETOF(CPUMCTX, dr[1]))); *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr[1]); } else if (offCpumCtx == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, dr2)) { LogFlow(("Changing dr[2] offset from %x to %x\n", offCpumCtx, RT_OFFSETOF(CPUMCTX, dr[2]))); *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr[2]); } else if (offCpumCtx == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, dr3)) { LogFlow(("Changing dr[3] offset from %x to %x\n", offCpumCtx, RT_OFFSETOF(CPUMCTX, dr[3]))); *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr[3]); } else if (offCpumCtx == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, dr4)) { LogFlow(("Changing dr[4] offset from %x to %x\n", offCpumCtx, RT_OFFSETOF(CPUMCTX, dr[4]))); *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr[4]); } else if (offCpumCtx == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, dr5)) { LogFlow(("Changing dr[5] offset from %x to %x\n", offCpumCtx, RT_OFFSETOF(CPUMCTX, dr[5]))); *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr[5]); } else if (offCpumCtx == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, dr6)) { LogFlow(("Changing dr[6] offset from %x to %x\n", offCpumCtx, RT_OFFSETOF(CPUMCTX, dr[6]))); *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr[6]); } else if (offCpumCtx == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, dr7)) { LogFlow(("Changing dr[7] offset from %x to %x\n", offCpumCtx, RT_OFFSETOF(CPUMCTX, dr[7]))); *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr[7]); } else if (offCpumCtx == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, cr0)) { LogFlow(("Changing cr0 offset from %x to %x\n", offCpumCtx, RT_OFFSETOF(CPUMCTX, cr0))); *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, cr0); } else if (offCpumCtx == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, cr2)) { LogFlow(("Changing cr2 offset from %x to %x\n", offCpumCtx, RT_OFFSETOF(CPUMCTX, cr2))); *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, cr2); } else if (offCpumCtx == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, cr3)) { LogFlow(("Changing cr3 offset from %x to %x\n", offCpumCtx, RT_OFFSETOF(CPUMCTX, cr3))); *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, cr3); } else if (offCpumCtx == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, cr4)) { LogFlow(("Changing cr4 offset from %x to %x\n", offCpumCtx, RT_OFFSETOF(CPUMCTX, cr4))); *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, cr4); } else if (offCpumCtx == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, tr)) { LogFlow(("Changing tr offset from %x to %x\n", offCpumCtx, RT_OFFSETOF(CPUMCTX, tr))); *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, tr); } else if (offCpumCtx == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, ldtr)) { LogFlow(("Changing ldtr offset from %x to %x\n", offCpumCtx, RT_OFFSETOF(CPUMCTX, ldtr))); *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, ldtr); } else if (offCpumCtx == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, gdtr.pGdt)) { LogFlow(("Changing pGdt offset from %x to %x\n", offCpumCtx, RT_OFFSETOF(CPUMCTX, gdtr.pGdt))); *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, gdtr.pGdt); } else if (offCpumCtx == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, gdtr.cbGdt)) { LogFlow(("Changing cbGdt offset from %x to %x\n", offCpumCtx, RT_OFFSETOF(CPUMCTX, gdtr.cbGdt))); *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, gdtr.cbGdt); } else if (offCpumCtx == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, idtr.pIdt)) { LogFlow(("Changing pIdt offset from %x to %x\n", offCpumCtx, RT_OFFSETOF(CPUMCTX, idtr.pIdt))); *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, idtr.pIdt); } else if (offCpumCtx == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, idtr.cbIdt)) { LogFlow(("Changing cbIdt offset from %x to %x\n", offCpumCtx, RT_OFFSETOF(CPUMCTX, idtr.cbIdt))); *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, idtr.cbIdt); } else AssertMsgFailed(("Unexpected CPUMCTX offset %x\n", offCpumCtx)); } else *pFixup = (uFixup - patmInfo.pCPUMCtxGC) + pVM->patm.s.pCPUMCtxGC; } else if ( uFixup >= patmInfo.pStatsGC && uFixup < patmInfo.pStatsGC + PATM_STAT_MEMSIZE) { LogFlow(("Changing absolute Stats at %RRv from %RRv to %RRv\n", patmInfo.pPatchMemGC + offset, uFixup, (uFixup - patmInfo.pStatsGC) + pVM->patm.s.pStatsGC)); *pFixup = (uFixup - patmInfo.pStatsGC) + pVM->patm.s.pStatsGC; } else if ( uFixup >= patmInfo.pGCStackGC && uFixup < patmInfo.pGCStackGC + PATM_STACK_TOTAL_SIZE) { LogFlow(("Changing absolute Stack at %RRv from %RRv to %RRv\n", patmInfo.pPatchMemGC + offset, uFixup, (uFixup - patmInfo.pGCStackGC) + pVM->patm.s.pGCStackGC)); *pFixup = (uFixup - patmInfo.pGCStackGC) + pVM->patm.s.pGCStackGC; } else if ( uFixup >= patmInfo.pPatchMemGC && uFixup < patmInfo.pPatchMemGC + patmInfo.cbPatchMem) { LogFlow(("Changing absolute PatchMem at %RRv from %RRv to %RRv\n", patmInfo.pPatchMemGC + offset, uFixup, (uFixup - patmInfo.pPatchMemGC) + pVM->patm.s.pPatchMemGC)); *pFixup = (uFixup - patmInfo.pPatchMemGC) + pVM->patm.s.pPatchMemGC; } /* * For PATM_SAVED_STATE_VERSION_FIXUP_HACK and earlier boldly ASSUME: * 1. That pCPUMCtxGC is in the VM structure and that its location is * at the first page of the same 4 MB chunk. * 2. That the forced actions were in the first 32 bytes of the VM * structure. * 3. That the CPUM leaves are less than 8KB into the structure. */ else if ( uVersion <= PATM_SAVED_STATE_VERSION_FIXUP_HACK && uFixup - (patmInfo.pCPUMCtxGC & UINT32_C(0xffc00000)) < UINT32_C(32)) { LogFlow(("Changing fLocalForcedActions fixup from %RRv to %RRv\n", uFixup, pVM->pVMRC + RT_OFFSETOF(VM, aCpus[0].fLocalForcedActions))); *pFixup = pVM->pVMRC + RT_OFFSETOF(VM, aCpus[0].fLocalForcedActions); pRec->pSource = pRec->pDest = PATM_ASMFIX_VM_FORCEDACTIONS; pRec->uType = FIXUP_ABSOLUTE_IN_PATCH_ASM_TMPL; } else if ( uVersion <= PATM_SAVED_STATE_VERSION_FIXUP_HACK && uFixup - (patmInfo.pCPUMCtxGC & UINT32_C(0xffc00000)) < UINT32_C(8192)) { static int cCpuidFixup = 0; /* Very dirty assumptions about the cpuid patch and cpuid ordering. */ switch (cCpuidFixup & 3) { case 0: *pFixup = CPUMR3GetGuestCpuIdPatmDefRCPtr(pVM); pRec->pSource = pRec->pDest = PATM_ASMFIX_CPUID_DEF_PTR; pRec->uType = FIXUP_ABSOLUTE_IN_PATCH_ASM_TMPL; break; case 1: *pFixup = CPUMR3GetGuestCpuIdPatmStdRCPtr(pVM); pRec->pSource = pRec->pDest = PATM_ASMFIX_CPUID_STD_PTR; pRec->uType = FIXUP_ABSOLUTE_IN_PATCH_ASM_TMPL; break; case 2: *pFixup = CPUMR3GetGuestCpuIdPatmExtRCPtr(pVM); pRec->pSource = pRec->pDest = PATM_ASMFIX_CPUID_EXT_PTR; pRec->uType = FIXUP_ABSOLUTE_IN_PATCH_ASM_TMPL; break; case 3: *pFixup = CPUMR3GetGuestCpuIdPatmCentaurRCPtr(pVM); pRec->pSource = pRec->pDest = PATM_ASMFIX_CPUID_CENTAUR_PTR; pRec->uType = FIXUP_ABSOLUTE_IN_PATCH_ASM_TMPL; break; } LogFlow(("Changing cpuid fixup %d from %RRv to %RRv\n", cCpuidFixup, uFixup, *pFixup)); cCpuidFixup++; } /* * For PATM_SAVED_STATE_VERSION_MEM thru PATM_SAVED_STATE_VERSION_NO_RAW_MEM * we abused Core.Key to store the type for fixups needing correcting on load. */ else if ( uVersion >= PATM_SAVED_STATE_VERSION_MEM && uVersion <= PATM_SAVED_STATE_VERSION_NO_RAW_MEM) { /* Core.Key abused to store the type of fixup. */ switch ((uintptr_t)pRec->Core.Key) { case PATM_FIXUP_CPU_FF_ACTION: *pFixup = pVM->pVMRC + RT_OFFSETOF(VM, aCpus[0].fLocalForcedActions); pRec->pSource = pRec->pDest = PATM_ASMFIX_VM_FORCEDACTIONS; pRec->uType = FIXUP_ABSOLUTE_IN_PATCH_ASM_TMPL; LogFlow(("Changing cpu ff action fixup from %x to %x\n", uFixup, *pFixup)); break; case PATM_FIXUP_CPUID_DEFAULT: *pFixup = CPUMR3GetGuestCpuIdPatmDefRCPtr(pVM); pRec->pSource = pRec->pDest = PATM_ASMFIX_CPUID_DEF_PTR; pRec->uType = FIXUP_ABSOLUTE_IN_PATCH_ASM_TMPL; LogFlow(("Changing cpuid def fixup from %x to %x\n", uFixup, *pFixup)); break; case PATM_FIXUP_CPUID_STANDARD: *pFixup = CPUMR3GetGuestCpuIdPatmStdRCPtr(pVM); pRec->pSource = pRec->pDest = PATM_ASMFIX_CPUID_STD_PTR; pRec->uType = FIXUP_ABSOLUTE_IN_PATCH_ASM_TMPL; LogFlow(("Changing cpuid std fixup from %x to %x\n", uFixup, *pFixup)); break; case PATM_FIXUP_CPUID_EXTENDED: *pFixup = CPUMR3GetGuestCpuIdPatmExtRCPtr(pVM); pRec->pSource = pRec->pDest = PATM_ASMFIX_CPUID_EXT_PTR; pRec->uType = FIXUP_ABSOLUTE_IN_PATCH_ASM_TMPL; LogFlow(("Changing cpuid ext fixup from %x to %x\n", uFixup, *pFixup)); break; case PATM_FIXUP_CPUID_CENTAUR: *pFixup = CPUMR3GetGuestCpuIdPatmCentaurRCPtr(pVM); pRec->pSource = pRec->pDest = PATM_ASMFIX_CPUID_CENTAUR_PTR; pRec->uType = FIXUP_ABSOLUTE_IN_PATCH_ASM_TMPL; LogFlow(("Changing cpuid centaur fixup from %x to %x\n", uFixup, *pFixup)); break; default: AssertMsgFailed(("Unexpected fixup value %p\n", (uintptr_t)pRec->Core.Key)); break; } } /* * After PATM_SAVED_STATE_VERSION_NO_RAW_MEM we changed the fixup type * and instead put the patch fixup code in the source and target addresses. */ else if ( uVersion > PATM_SAVED_STATE_VERSION_NO_RAW_MEM && pRec->uType == FIXUP_ABSOLUTE_IN_PATCH_ASM_TMPL) { Assert(pRec->pSource == pRec->pDest); Assert(PATM_IS_ASMFIX(pRec->pSource)); switch (pRec->pSource) { case PATM_ASMFIX_VM_FORCEDACTIONS: *pFixup = pVM->pVMRC + RT_OFFSETOF(VM, aCpus[0].fLocalForcedActions); break; case PATM_ASMFIX_CPUID_DEF_PTR: *pFixup = CPUMR3GetGuestCpuIdPatmDefRCPtr(pVM); break; case PATM_ASMFIX_CPUID_STD_PTR: /* Saved again patches only. */ *pFixup = CPUMR3GetGuestCpuIdPatmStdRCPtr(pVM); break; case PATM_ASMFIX_CPUID_EXT_PTR: /* Saved again patches only. */ *pFixup = CPUMR3GetGuestCpuIdPatmExtRCPtr(pVM); break; case PATM_ASMFIX_CPUID_CENTAUR_PTR: /* Saved again patches only. */ *pFixup = CPUMR3GetGuestCpuIdPatmCentaurRCPtr(pVM); break; case PATM_ASMFIX_REUSE_LATER_0: /* Was only used for a few days. Don't want to keep this legacy around. */ case PATM_ASMFIX_REUSE_LATER_1: AssertLogRelMsgFailedReturn(("Unsupported PATM fixup. You have to discard this saved state or snapshot."), VERR_INTERNAL_ERROR); break; } } /* * Constant that may change between VM version needs fixing up. */ else if (pRec->uType == FIXUP_CONSTANT_IN_PATCH_ASM_TMPL) { AssertLogRelReturn(uVersion > PATM_SAVED_STATE_VERSION_NO_RAW_MEM, VERR_SSM_DATA_UNIT_FORMAT_CHANGED); Assert(pRec->pSource == pRec->pDest); Assert(PATM_IS_ASMFIX(pRec->pSource)); switch (pRec->pSource) { case PATM_ASMFIX_REUSE_LATER_2: /* Was only used for a few days. Don't want to keep this legacy around. */ case PATM_ASMFIX_REUSE_LATER_3: AssertLogRelMsgFailedReturn(("Unsupported PATM fixup. You have to discard this saved state or snapshot."), VERR_INTERNAL_ERROR); break; default: AssertLogRelMsgFailed(("Unknown FIXUP_CONSTANT_IN_PATCH_ASM_TMPL fixup: %#x\n", pRec->pSource)); return VERR_SSM_DATA_UNIT_FORMAT_CHANGED; } } /* * Relative fixups for calling or jumping to helper functions inside VMMRC. * (The distance between the helper function and the patch is subject to * new code being added to VMMRC as well as VM configurations influencing * heap allocations and so on and so forth.) */ else if (pRec->uType == FIXUP_REL_HELPER_IN_PATCH_ASM_TMPL) { AssertLogRelReturn(uVersion > PATM_SAVED_STATE_VERSION_NO_RAW_MEM, VERR_SSM_DATA_UNIT_FORMAT_CHANGED); Assert(pRec->pSource == pRec->pDest); Assert(PATM_IS_ASMFIX(pRec->pSource)); int rc; RTRCPTR uRCPtrDest; switch (pRec->pSource) { case PATM_ASMFIX_HELPER_CPUM_CPUID: rc = PDMR3LdrGetSymbolRC(pVM, NULL, "CPUMPatchHlpCpuId", &uRCPtrDest); AssertLogRelRCReturn(rc, rc); break; default: AssertLogRelMsgFailed(("Unknown FIXUP_REL_HLP_CALL_IN_PATCH_ASM_TMPL fixup: %#x\n", pRec->pSource)); return VERR_SSM_DATA_UNIT_FORMAT_CHANGED; } RTRCPTR uRCPtrAfter = pVM->patm.s.pPatchMemGC + ((uintptr_t)&pFixup[1] - (uintptr_t)pVM->patm.s.pPatchMemHC); *pFixup = uRCPtrDest - uRCPtrAfter; } #ifdef RT_OS_WINDOWS AssertCompile(RT_OFFSETOF(VM, fGlobalForcedActions) < 32); #endif break; } case FIXUP_REL_JMPTOPATCH: { RTRCPTR pTarget = (RTRCPTR)((RTRCINTPTR)pRec->pDest + delta); if ( pPatch->uState == PATCH_ENABLED && (pPatch->flags & PATMFL_PATCHED_GUEST_CODE)) { uint8_t oldJump[SIZEOF_NEAR_COND_JUMP32]; uint8_t temp[SIZEOF_NEAR_COND_JUMP32]; RTRCPTR pJumpOffGC; RTRCINTPTR displ = (RTRCINTPTR)pTarget - (RTRCINTPTR)pRec->pSource; RTRCINTPTR displOld= (RTRCINTPTR)pRec->pDest - (RTRCINTPTR)pRec->pSource; Log(("Relative fixup (g2p) %08X -> %08X at %08X (source=%08x, target=%08x)\n", *(int32_t*)pRec->pRelocPos, displ, pRec->pRelocPos, pRec->pSource, pRec->pDest)); Assert(pRec->pSource - pPatch->cbPatchJump == pPatch->pPrivInstrGC); #ifdef PATM_RESOLVE_CONFLICTS_WITH_JUMP_PATCHES if (pPatch->cbPatchJump == SIZEOF_NEAR_COND_JUMP32) { Assert(pPatch->flags & PATMFL_JUMP_CONFLICT); pJumpOffGC = pPatch->pPrivInstrGC + 2; //two byte opcode oldJump[0] = pPatch->aPrivInstr[0]; oldJump[1] = pPatch->aPrivInstr[1]; *(RTRCUINTPTR *)&oldJump[2] = displOld; } else #endif if (pPatch->cbPatchJump == SIZEOF_NEARJUMP32) { pJumpOffGC = pPatch->pPrivInstrGC + 1; //one byte opcode oldJump[0] = 0xE9; *(RTRCUINTPTR *)&oldJump[1] = displOld; } else { AssertMsgFailed(("Invalid patch jump size %d\n", pPatch->cbPatchJump)); break; } Assert(pPatch->cbPatchJump <= sizeof(temp)); /* * Read old patch jump and compare it to the one we previously installed */ int rc = PGMPhysSimpleReadGCPtr(VMMGetCpu0(pVM), temp, pPatch->pPrivInstrGC, pPatch->cbPatchJump); Assert(RT_SUCCESS(rc) || rc == VERR_PAGE_NOT_PRESENT || rc == VERR_PAGE_TABLE_NOT_PRESENT); if (rc == VERR_PAGE_NOT_PRESENT || rc == VERR_PAGE_TABLE_NOT_PRESENT) { RTRCPTR pPage = pPatch->pPrivInstrGC & PAGE_BASE_GC_MASK; rc = PGMR3HandlerVirtualRegister(pVM, VMMGetCpu(pVM), pVM->patm.s.hMonitorPageType, pPage, pPage + (PAGE_SIZE - 1) /* inclusive! */, (void *)(uintptr_t)pPage, pPage, NULL /*pszDesc*/); Assert(RT_SUCCESS(rc) || rc == VERR_PGM_HANDLER_VIRTUAL_CONFLICT); } else if (memcmp(temp, oldJump, pPatch->cbPatchJump)) { Log(("PATM: Patch jump was overwritten -> disabling patch!!\n")); /* * Disable patch; this is not a good solution */ /** @todo hopefully it was completely overwritten (if the read was successful)!!!! */ pPatch->uState = PATCH_DISABLED; } else if (RT_SUCCESS(rc)) { rc = PGMPhysSimpleDirtyWriteGCPtr(VMMGetCpu0(pVM), pJumpOffGC, &displ, sizeof(displ)); AssertRC(rc); } else AssertMsgFailed(("Unexpected error %d from MMR3PhysReadGCVirt\n", rc)); } else Log(("Skip the guest jump to patch code for this disabled patch %08X\n", pRec->pRelocPos)); pRec->pDest = pTarget; break; } case FIXUP_REL_JMPTOGUEST: { RTRCPTR pSource = (RTRCPTR)((RTRCINTPTR)pRec->pSource + delta); RTRCINTPTR displ = (RTRCINTPTR)pRec->pDest - (RTRCINTPTR)pSource; Assert(!(pPatch->flags & PATMFL_GLOBAL_FUNCTIONS)); Log(("Relative fixup (p2g) %08X -> %08X at %08X (source=%08x, target=%08x)\n", *(int32_t*)pRec->pRelocPos, displ, pRec->pRelocPos, pRec->pSource, pRec->pDest)); *(RTRCUINTPTR *)pRec->pRelocPos = displ; pRec->pSource = pSource; break; } } return VINF_SUCCESS; }