/* $Id: EMAll.cpp 8160 2008-04-18 16:15:42Z vboxsync $ */ /** @file * EM - Execution Monitor(/Manager) - All contexts */ /* * Copyright (C) 2006-2007 Sun Microsystems, Inc. * * 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. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa * Clara, CA 95054 USA or visit http://www.sun.com if you need * additional information or have any questions. */ /******************************************************************************* * Header Files * *******************************************************************************/ #define LOG_GROUP LOG_GROUP_EM #include #include #include #include #include #include #include #include #include "EMInternal.h" #include #include #include #include #include #include #include #include #include #include #include /******************************************************************************* * Structures and Typedefs * *******************************************************************************/ typedef DECLCALLBACK(uint32_t) PFN_EMULATE_PARAM2_UINT32(uint32_t *pu32Param1, uint32_t val2); typedef DECLCALLBACK(uint32_t) PFN_EMULATE_PARAM2(uint32_t *pu32Param1, size_t val2); typedef DECLCALLBACK(uint32_t) PFN_EMULATE_PARAM3(uint32_t *pu32Param1, uint32_t val2, size_t val3); typedef DECLCALLBACK(int) FNEMULATELOCKPARAM2(RTGCPTR GCPtrParam1, RTGCUINTREG Val2, uint32_t *pf); typedef FNEMULATELOCKPARAM2 *PFNEMULATELOCKPARAM2; typedef DECLCALLBACK(int) FNEMULATELOCKPARAM3(RTGCPTR GCPtrParam1, RTGCUINTREG Val2, size_t cb, uint32_t *pf); typedef FNEMULATELOCKPARAM3 *PFNEMULATELOCKPARAM3; /******************************************************************************* * Internal Functions * *******************************************************************************/ DECLINLINE(int) emInterpretInstructionCPU(PVM pVM, PDISCPUSTATE pCpu, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, uint32_t *pcbSize); /** * Get the current execution manager status. * * @returns Current status. */ EMDECL(EMSTATE) EMGetState(PVM pVM) { return pVM->em.s.enmState; } #ifndef IN_GC /** * Read callback for disassembly function; supports reading bytes that cross a page boundary * * @returns VBox status code. * @param pSrc GC source pointer * @param pDest HC destination pointer * @param size Number of bytes to read * @param dwUserdata Callback specific user data (pCpu) * */ DECLCALLBACK(int) EMReadBytes(RTHCUINTPTR pSrc, uint8_t *pDest, unsigned size, void *pvUserdata) { DISCPUSTATE *pCpu = (DISCPUSTATE *)pvUserdata; PVM pVM = (PVM)pCpu->apvUserData[0]; #ifdef IN_RING0 int rc = PGMPhysReadGCPtr(pVM, pDest, pSrc, size); AssertRC(rc); #else if (!PATMIsPatchGCAddr(pVM, pSrc)) { int rc = PGMPhysReadGCPtr(pVM, pDest, pSrc, size); AssertRC(rc); } else { for (uint32_t i = 0; i < size; i++) { uint8_t opcode; if (VBOX_SUCCESS(PATMR3QueryOpcode(pVM, (RTGCPTR)pSrc + i, &opcode))) { *(pDest+i) = opcode; } } } #endif /* IN_RING0 */ return VINF_SUCCESS; } DECLINLINE(int) emDisCoreOne(PVM pVM, DISCPUSTATE *pCpu, RTGCUINTPTR InstrGC, uint32_t *pOpsize) { return DISCoreOneEx(InstrGC, pCpu->mode, EMReadBytes, pVM, pCpu, pOpsize); } #else DECLINLINE(int) emDisCoreOne(PVM pVM, DISCPUSTATE *pCpu, RTGCUINTPTR InstrGC, uint32_t *pOpsize) { return DISCoreOne(pCpu, InstrGC, pOpsize); } #endif /** * Disassembles one instruction. * * @param pVM The VM handle. * @param pCtxCore The context core (used for both the mode and instruction). * @param pCpu Where to return the parsed instruction info. * @param pcbInstr Where to return the instruction size. (optional) */ EMDECL(int) EMInterpretDisasOne(PVM pVM, PCCPUMCTXCORE pCtxCore, PDISCPUSTATE pCpu, unsigned *pcbInstr) { RTGCPTR GCPtrInstr; int rc = SELMValidateAndConvertCSAddr(pVM, pCtxCore->eflags, pCtxCore->ss, pCtxCore->cs, (PCPUMSELREGHID)&pCtxCore->csHid, (RTGCPTR)pCtxCore->eip, &GCPtrInstr); if (VBOX_FAILURE(rc)) { Log(("EMInterpretDisasOne: Failed to convert %RTsel:%RX32 (cpl=%d) - rc=%Vrc !!\n", pCtxCore->cs, pCtxCore->eip, pCtxCore->ss & X86_SEL_RPL, rc)); return rc; } return EMInterpretDisasOneEx(pVM, (RTGCUINTPTR)GCPtrInstr, pCtxCore, pCpu, pcbInstr); } /** * Disassembles one instruction. * * This is used by internally by the interpreter and by trap/access handlers. * * @param pVM The VM handle. * @param GCPtrInstr The flat address of the instruction. * @param pCtxCore The context core (used to determin the cpu mode). * @param pCpu Where to return the parsed instruction info. * @param pcbInstr Where to return the instruction size. (optional) */ EMDECL(int) EMInterpretDisasOneEx(PVM pVM, RTGCUINTPTR GCPtrInstr, PCCPUMCTXCORE pCtxCore, PDISCPUSTATE pCpu, unsigned *pcbInstr) { int rc = DISCoreOneEx(GCPtrInstr, SELMIsSelector32Bit(pVM, pCtxCore->eflags, pCtxCore->cs, (PCPUMSELREGHID)&pCtxCore->csHid) ? CPUMODE_32BIT : CPUMODE_16BIT, #ifdef IN_GC NULL, NULL, #else EMReadBytes, pVM, #endif pCpu, pcbInstr); if (VBOX_SUCCESS(rc)) return VINF_SUCCESS; AssertMsgFailed(("DISCoreOne failed to GCPtrInstr=%VGv rc=%Vrc\n", GCPtrInstr, rc)); return VERR_INTERNAL_ERROR; } /** * Interprets the current instruction. * * @returns VBox status code. * @retval VINF_* Scheduling instructions. * @retval VERR_EM_INTERPRETER Something we can't cope with. * @retval VERR_* Fatal errors. * * @param pVM The VM handle. * @param pRegFrame The register frame. * Updates the EIP if an instruction was executed successfully. * @param pvFault The fault address (CR2). * @param pcbSize Size of the write (if applicable). * * @remark Invalid opcode exceptions have a higher priority than GP (see Intel * Architecture System Developers Manual, Vol 3, 5.5) so we don't need * to worry about e.g. invalid modrm combinations (!) */ EMDECL(int) EMInterpretInstruction(PVM pVM, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, uint32_t *pcbSize) { RTGCPTR pbCode; int rc = SELMValidateAndConvertCSAddr(pVM, pRegFrame->eflags, pRegFrame->ss, pRegFrame->cs, &pRegFrame->csHid, (RTGCPTR)pRegFrame->eip, &pbCode); if (VBOX_SUCCESS(rc)) { uint32_t cbOp; DISCPUSTATE Cpu; Cpu.mode = SELMIsSelector32Bit(pVM, pRegFrame->eflags, pRegFrame->cs, &pRegFrame->csHid) ? CPUMODE_32BIT : CPUMODE_16BIT; rc = emDisCoreOne(pVM, &Cpu, (RTGCUINTPTR)pbCode, &cbOp); if (VBOX_SUCCESS(rc)) { Assert(cbOp == Cpu.opsize); rc = EMInterpretInstructionCPU(pVM, &Cpu, pRegFrame, pvFault, pcbSize); if (VBOX_SUCCESS(rc)) { pRegFrame->eip += cbOp; /* Move on to the next instruction. */ } return rc; } } return VERR_EM_INTERPRETER; } /** * Interprets the current instruction using the supplied DISCPUSTATE structure. * * EIP is *NOT* updated! * * @returns VBox status code. * @retval VINF_* Scheduling instructions. When these are returned, it * starts to get a bit tricky to know whether code was * executed or not... We'll address this when it becomes a problem. * @retval VERR_EM_INTERPRETER Something we can't cope with. * @retval VERR_* Fatal errors. * * @param pVM The VM handle. * @param pCpu The disassembler cpu state for the instruction to be interpreted. * @param pRegFrame The register frame. EIP is *NOT* changed! * @param pvFault The fault address (CR2). * @param pcbSize Size of the write (if applicable). * * @remark Invalid opcode exceptions have a higher priority than GP (see Intel * Architecture System Developers Manual, Vol 3, 5.5) so we don't need * to worry about e.g. invalid modrm combinations (!) * * @todo At this time we do NOT check if the instruction overwrites vital information. * Make sure this can't happen!! (will add some assertions/checks later) */ EMDECL(int) EMInterpretInstructionCPU(PVM pVM, PDISCPUSTATE pCpu, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, uint32_t *pcbSize) { STAM_PROFILE_START(&CTXMID(pVM->em.s.CTXSUFF(pStats)->Stat,Emulate), a); int rc = emInterpretInstructionCPU(pVM, pCpu, pRegFrame, pvFault, pcbSize); STAM_PROFILE_STOP(&CTXMID(pVM->em.s.CTXSUFF(pStats)->Stat,Emulate), a); if (VBOX_SUCCESS(rc)) STAM_COUNTER_INC(&pVM->em.s.CTXSUFF(pStats)->CTXMID(Stat,InterpretSucceeded)); else STAM_COUNTER_INC(&pVM->em.s.CTXSUFF(pStats)->CTXMID(Stat,InterpretFailed)); return rc; } /** * Interpret a port I/O instruction. * * @returns VBox status code suitable for scheduling. * @param pVM The VM handle. * @param pCtxCore The context core. This will be updated on successful return. * @param pCpu The instruction to interpret. * @param cbOp The size of the instruction. * @remark This may raise exceptions. */ EMDECL(int) EMInterpretPortIO(PVM pVM, PCPUMCTXCORE pCtxCore, PDISCPUSTATE pCpu, uint32_t cbOp) { /* * Hand it on to IOM. */ #ifdef IN_GC int rc = IOMGCIOPortHandler(pVM, pCtxCore, pCpu); if (IOM_SUCCESS(rc)) pCtxCore->eip += cbOp; return rc; #else AssertReleaseMsgFailed(("not implemented\n")); return VERR_NOT_IMPLEMENTED; #endif } DECLINLINE(int) emRamRead(PVM pVM, void *pDest, RTGCPTR GCSrc, uint32_t cb) { #ifdef IN_GC int rc = MMGCRamRead(pVM, pDest, GCSrc, cb); if (RT_LIKELY(rc != VERR_ACCESS_DENIED)) return rc; /* * The page pool cache may end up here in some cases because it * flushed one of the shadow mappings used by the trapping * instruction and it either flushed the TLB or the CPU reused it. */ RTGCPHYS GCPhys; rc = PGMPhysGCPtr2GCPhys(pVM, GCSrc, &GCPhys); AssertRCReturn(rc, rc); PGMPhysRead(pVM, GCPhys, pDest, cb); return VINF_SUCCESS; #else return PGMPhysReadGCPtrSafe(pVM, pDest, GCSrc, cb); #endif } DECLINLINE(int) emRamWrite(PVM pVM, RTGCPTR GCDest, void *pSrc, uint32_t cb) { #ifdef IN_GC int rc = MMGCRamWrite(pVM, GCDest, pSrc, cb); if (RT_LIKELY(rc != VERR_ACCESS_DENIED)) return rc; /* * The page pool cache may end up here in some cases because it * flushed one of the shadow mappings used by the trapping * instruction and it either flushed the TLB or the CPU reused it. * We want to play safe here, verifying that we've got write * access doesn't cost us much (see PGMPhysGCPtr2GCPhys()). */ uint64_t fFlags; RTGCPHYS GCPhys; rc = PGMGstGetPage(pVM, GCDest, &fFlags, &GCPhys); if (RT_FAILURE(rc)) return rc; if ( !(fFlags & X86_PTE_RW) && (CPUMGetGuestCR0(pVM) & X86_CR0_WP)) return VERR_ACCESS_DENIED; PGMPhysWrite(pVM, GCPhys + ((RTGCUINTPTR)GCDest & PAGE_OFFSET_MASK), pSrc, cb); return VINF_SUCCESS; #else return PGMPhysWriteGCPtrSafe(pVM, GCDest, pSrc, cb); #endif } /* Convert sel:addr to a flat GC address */ static RTGCPTR emConvertToFlatAddr(PVM pVM, PCPUMCTXCORE pRegFrame, PDISCPUSTATE pCpu, POP_PARAMETER pParam, RTGCPTR pvAddr) { int prefix_seg, rc; RTSEL sel; CPUMSELREGHID *pSelHidReg; prefix_seg = DISDetectSegReg(pCpu, pParam); rc = DISFetchRegSegEx(pRegFrame, prefix_seg, &sel, &pSelHidReg); if (VBOX_FAILURE(rc)) return pvAddr; return SELMToFlat(pVM, pRegFrame->eflags, sel, pSelHidReg, pvAddr); } #if defined(VBOX_STRICT) || defined(LOG_ENABLED) /** * Get the mnemonic for the disassembled instruction. * * GC/R0 doesn't include the strings in the DIS tables because * of limited space. */ static const char *emGetMnemonic(PDISCPUSTATE pCpu) { switch (pCpu->pCurInstr->opcode) { case OP_XOR: return "Xor"; case OP_OR: return "Or"; case OP_AND: return "And"; case OP_BTR: return "Btr"; case OP_BTS: return "Bts"; default: AssertMsgFailed(("%d\n", pCpu->pCurInstr->opcode)); return "???"; } } #endif /** * XCHG instruction emulation. */ static int emInterpretXchg(PVM pVM, PDISCPUSTATE pCpu, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, uint32_t *pcbSize) { OP_PARAMVAL param1, param2; /* Source to make DISQueryParamVal read the register value - ugly hack */ int rc = DISQueryParamVal(pRegFrame, pCpu, &pCpu->param1, ¶m1, PARAM_SOURCE); if(VBOX_FAILURE(rc)) return VERR_EM_INTERPRETER; rc = DISQueryParamVal(pRegFrame, pCpu, &pCpu->param2, ¶m2, PARAM_SOURCE); if(VBOX_FAILURE(rc)) return VERR_EM_INTERPRETER; #ifdef IN_GC if (TRPMHasTrap(pVM)) { if (TRPMGetErrorCode(pVM) & X86_TRAP_PF_RW) { #endif RTGCPTR pParam1 = 0, pParam2 = 0; uint32_t valpar1, valpar2; AssertReturn(pCpu->param1.size == pCpu->param2.size, VERR_EM_INTERPRETER); switch(param1.type) { case PARMTYPE_IMMEDIATE: /* register type is translated to this one too */ valpar1 = param1.val.val32; break; case PARMTYPE_ADDRESS: pParam1 = (RTGCPTR)param1.val.val32; pParam1 = emConvertToFlatAddr(pVM, pRegFrame, pCpu, &pCpu->param1, pParam1); #ifdef IN_GC /* Safety check (in theory it could cross a page boundary and fault there though) */ AssertReturn(pParam1 == pvFault, VERR_EM_INTERPRETER); #endif rc = emRamRead(pVM, &valpar1, pParam1, param1.size); if (VBOX_FAILURE(rc)) { AssertMsgFailed(("MMGCRamRead %VGv size=%d failed with %Vrc\n", pParam1, param1.size, rc)); return VERR_EM_INTERPRETER; } break; default: AssertFailed(); return VERR_EM_INTERPRETER; } switch(param2.type) { case PARMTYPE_ADDRESS: pParam2 = (RTGCPTR)param2.val.val32; pParam2 = emConvertToFlatAddr(pVM, pRegFrame, pCpu, &pCpu->param2, pParam2); #ifdef IN_GC /* Safety check (in theory it could cross a page boundary and fault there though) */ AssertReturn(pParam2 == pvFault, VERR_EM_INTERPRETER); #endif rc = emRamRead(pVM, &valpar2, pParam2, param2.size); if (VBOX_FAILURE(rc)) { AssertMsgFailed(("MMGCRamRead %VGv size=%d failed with %Vrc\n", pParam1, param1.size, rc)); } break; case PARMTYPE_IMMEDIATE: valpar2 = param2.val.val32; break; default: AssertFailed(); return VERR_EM_INTERPRETER; } /* Write value of parameter 2 to parameter 1 (reg or memory address) */ if (pParam1 == 0) { Assert(param1.type == PARMTYPE_IMMEDIATE); /* register actually */ switch(param1.size) { case 1: //special case for AH etc rc = DISWriteReg8(pRegFrame, pCpu->param1.base.reg_gen8, (uint8_t)valpar2); break; case 2: rc = DISWriteReg16(pRegFrame, pCpu->param1.base.reg_gen32, (uint16_t)valpar2); break; case 4: rc = DISWriteReg32(pRegFrame, pCpu->param1.base.reg_gen32, valpar2); break; default: AssertFailedReturn(VERR_EM_INTERPRETER); } if (VBOX_FAILURE(rc)) return VERR_EM_INTERPRETER; } else { rc = emRamWrite(pVM, pParam1, &valpar2, param1.size); if (VBOX_FAILURE(rc)) { AssertMsgFailed(("emRamWrite %VGv size=%d failed with %Vrc\n", pParam1, param1.size, rc)); return VERR_EM_INTERPRETER; } } /* Write value of parameter 1 to parameter 2 (reg or memory address) */ if (pParam2 == 0) { Assert(param2.type == PARMTYPE_IMMEDIATE); /* register actually */ switch(param2.size) { case 1: //special case for AH etc rc = DISWriteReg8(pRegFrame, pCpu->param2.base.reg_gen8, (uint8_t)valpar1); break; case 2: rc = DISWriteReg16(pRegFrame, pCpu->param2.base.reg_gen32, (uint16_t)valpar1); break; case 4: rc = DISWriteReg32(pRegFrame, pCpu->param2.base.reg_gen32, valpar1); break; default: AssertFailedReturn(VERR_EM_INTERPRETER); } if (VBOX_FAILURE(rc)) return VERR_EM_INTERPRETER; } else { rc = emRamWrite(pVM, pParam2, &valpar1, param2.size); if (VBOX_FAILURE(rc)) { AssertMsgFailed(("emRamWrite %VGv size=%d failed with %Vrc\n", pParam1, param1.size, rc)); return VERR_EM_INTERPRETER; } } *pcbSize = param2.size; return VINF_SUCCESS; #ifdef IN_GC } } #endif return VERR_EM_INTERPRETER; } /** * INC and DEC emulation. */ static int emInterpretIncDec(PVM pVM, PDISCPUSTATE pCpu, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, uint32_t *pcbSize, PFN_EMULATE_PARAM2 pfnEmulate) { OP_PARAMVAL param1; int rc = DISQueryParamVal(pRegFrame, pCpu, &pCpu->param1, ¶m1, PARAM_DEST); if(VBOX_FAILURE(rc)) return VERR_EM_INTERPRETER; #ifdef IN_GC if (TRPMHasTrap(pVM)) { if (TRPMGetErrorCode(pVM) & X86_TRAP_PF_RW) { #endif RTGCPTR pParam1 = 0; uint32_t valpar1; if (param1.type == PARMTYPE_ADDRESS) { pParam1 = (RTGCPTR)param1.val.val32; pParam1 = emConvertToFlatAddr(pVM, pRegFrame, pCpu, &pCpu->param1, pParam1); #ifdef IN_GC /* Safety check (in theory it could cross a page boundary and fault there though) */ AssertReturn(pParam1 == pvFault, VERR_EM_INTERPRETER); #endif rc = emRamRead(pVM, &valpar1, pParam1, param1.size); if (VBOX_FAILURE(rc)) { AssertMsgFailed(("emRamRead %VGv size=%d failed with %Vrc\n", pParam1, param1.size, rc)); return VERR_EM_INTERPRETER; } } else { AssertFailed(); return VERR_EM_INTERPRETER; } uint32_t eflags; eflags = pfnEmulate(&valpar1, param1.size); /* Write result back */ rc = emRamWrite(pVM, pParam1, &valpar1, param1.size); if (VBOX_FAILURE(rc)) { AssertMsgFailed(("emRamWrite %VGv size=%d failed with %Vrc\n", pParam1, param1.size, rc)); return VERR_EM_INTERPRETER; } /* Update guest's eflags and finish. */ pRegFrame->eflags.u32 = (pRegFrame->eflags.u32 & ~(X86_EFL_PF | X86_EFL_AF | X86_EFL_ZF | X86_EFL_SF | X86_EFL_OF)) | (eflags & (X86_EFL_PF | X86_EFL_AF | X86_EFL_ZF | X86_EFL_SF | X86_EFL_OF)); /* All done! */ *pcbSize = param1.size; return VINF_SUCCESS; #ifdef IN_GC } } #endif return VERR_EM_INTERPRETER; } /** * POP Emulation. */ static int emInterpretPop(PVM pVM, PDISCPUSTATE pCpu, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, uint32_t *pcbSize) { OP_PARAMVAL param1; int rc = DISQueryParamVal(pRegFrame, pCpu, &pCpu->param1, ¶m1, PARAM_DEST); if(VBOX_FAILURE(rc)) return VERR_EM_INTERPRETER; #ifdef IN_GC if (TRPMHasTrap(pVM)) { if (TRPMGetErrorCode(pVM) & X86_TRAP_PF_RW) { #endif RTGCPTR pParam1 = 0; uint32_t valpar1; RTGCPTR pStackVal; /* Read stack value first */ if (SELMIsSelector32Bit(pVM, pRegFrame->eflags, pRegFrame->ss, &pRegFrame->ssHid) == false) return VERR_EM_INTERPRETER; /* No legacy 16 bits stuff here, please. */ /* Convert address; don't bother checking limits etc, as we only read here */ pStackVal = SELMToFlat(pVM, pRegFrame->eflags, pRegFrame->ss, &pRegFrame->ssHid, (RTGCPTR)pRegFrame->esp); if (pStackVal == 0) return VERR_EM_INTERPRETER; rc = emRamRead(pVM, &valpar1, pStackVal, param1.size); if (VBOX_FAILURE(rc)) { AssertMsgFailed(("emRamRead %VGv size=%d failed with %Vrc\n", pParam1, param1.size, rc)); return VERR_EM_INTERPRETER; } if (param1.type == PARMTYPE_ADDRESS) { pParam1 = (RTGCPTR)param1.val.val32; /* pop [esp+xx] uses esp after the actual pop! */ AssertCompile(USE_REG_ESP == USE_REG_SP); if ( (pCpu->param1.flags & USE_BASE) && (pCpu->param1.flags & (USE_REG_GEN16|USE_REG_GEN32)) && pCpu->param1.base.reg_gen32 == USE_REG_ESP ) pParam1 = (RTGCPTR)((RTGCUINTPTR)pParam1 + param1.size); pParam1 = emConvertToFlatAddr(pVM, pRegFrame, pCpu, &pCpu->param1, pParam1); #ifdef IN_GC /* Safety check (in theory it could cross a page boundary and fault there though) */ AssertMsgReturn(pParam1 == pvFault || (RTGCPTR)pRegFrame->esp == pvFault, ("%VGv != %VGv ss:esp=%04X:%VGv\n", pParam1, pvFault, pRegFrame->ss, pRegFrame->esp), VERR_EM_INTERPRETER); #endif rc = emRamWrite(pVM, pParam1, &valpar1, param1.size); if (VBOX_FAILURE(rc)) { AssertMsgFailed(("emRamWrite %VGv size=%d failed with %Vrc\n", pParam1, param1.size, rc)); return VERR_EM_INTERPRETER; } /* Update ESP as the last step */ pRegFrame->esp += param1.size; } else { #ifndef DEBUG_bird // annoying assertion. AssertFailed(); #endif return VERR_EM_INTERPRETER; } /* All done! */ *pcbSize = param1.size; return VINF_SUCCESS; #ifdef IN_GC } } #endif return VERR_EM_INTERPRETER; } /** * XOR/OR/AND Emulation. */ static int emInterpretOrXorAnd(PVM pVM, PDISCPUSTATE pCpu, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, uint32_t *pcbSize, PFN_EMULATE_PARAM3 pfnEmulate) { OP_PARAMVAL param1, param2; int rc = DISQueryParamVal(pRegFrame, pCpu, &pCpu->param1, ¶m1, PARAM_DEST); if(VBOX_FAILURE(rc)) return VERR_EM_INTERPRETER; rc = DISQueryParamVal(pRegFrame, pCpu, &pCpu->param2, ¶m2, PARAM_SOURCE); if(VBOX_FAILURE(rc)) return VERR_EM_INTERPRETER; #ifdef DEBUG const char *pszInstr; if (pCpu->pCurInstr->opcode == OP_XOR) pszInstr = "Xor"; else if (pCpu->pCurInstr->opcode == OP_OR) pszInstr = "Or"; else if (pCpu->pCurInstr->opcode == OP_AND) pszInstr = "And"; #endif #ifdef IN_GC if (TRPMHasTrap(pVM)) { if (TRPMGetErrorCode(pVM) & X86_TRAP_PF_RW) { #endif RTGCPTR pParam1; uint32_t valpar1, valpar2; if (pCpu->param1.size != pCpu->param2.size) { if (pCpu->param1.size < pCpu->param2.size) { AssertMsgFailed(("%s at %VGv parameter mismatch %d vs %d!!\n", pszInstr, pRegFrame->eip, pCpu->param1.size, pCpu->param2.size)); /* should never happen! */ return VERR_EM_INTERPRETER; } /* Or %Ev, Ib -> just a hack to save some space; the data width of the 1st parameter determines the real width */ pCpu->param2.size = pCpu->param1.size; param2.size = param1.size; } /* The destination is always a virtual address */ if (param1.type == PARMTYPE_ADDRESS) { pParam1 = (RTGCPTR)param1.val.val32; pParam1 = emConvertToFlatAddr(pVM, pRegFrame, pCpu, &pCpu->param1, pParam1); #ifdef IN_GC /* Safety check (in theory it could cross a page boundary and fault there though) */ AssertMsgReturn(pParam1 == pvFault, ("eip=%VGv, pParam1=%VGv pvFault=%VGv\n", pRegFrame->eip, pParam1, pvFault), VERR_EM_INTERPRETER); #endif rc = emRamRead(pVM, &valpar1, pParam1, param1.size); if (VBOX_FAILURE(rc)) { AssertMsgFailed(("emRamRead %VGv size=%d failed with %Vrc\n", pParam1, param1.size, rc)); return VERR_EM_INTERPRETER; } } else { AssertFailed(); return VERR_EM_INTERPRETER; } /* Register or immediate data */ switch(param2.type) { case PARMTYPE_IMMEDIATE: /* both immediate data and register (ugly) */ valpar2 = param2.val.val32; break; default: AssertFailed(); return VERR_EM_INTERPRETER; } /* Data read, emulate instruction. */ uint32_t eflags = pfnEmulate(&valpar1, valpar2, param2.size); /* Update guest's eflags and finish. */ pRegFrame->eflags.u32 = (pRegFrame->eflags.u32 & ~(X86_EFL_CF | X86_EFL_PF | X86_EFL_AF | X86_EFL_ZF | X86_EFL_SF | X86_EFL_OF)) | (eflags & (X86_EFL_CF | X86_EFL_PF | X86_EFL_AF | X86_EFL_ZF | X86_EFL_SF | X86_EFL_OF)); /* And write it back */ rc = emRamWrite(pVM, pParam1, &valpar1, param1.size); if (VBOX_SUCCESS(rc)) { /* All done! */ *pcbSize = param2.size; return VINF_SUCCESS; } #ifdef IN_GC } } #endif return VERR_EM_INTERPRETER; } #ifdef IN_GC /** * LOCK XOR/OR/AND Emulation. */ static int emInterpretLockOrXorAnd(PVM pVM, PDISCPUSTATE pCpu, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, uint32_t *pcbSize, PFNEMULATELOCKPARAM3 pfnEmulate) { OP_PARAMVAL param1, param2; int rc = DISQueryParamVal(pRegFrame, pCpu, &pCpu->param1, ¶m1, PARAM_DEST); if(VBOX_FAILURE(rc)) return VERR_EM_INTERPRETER; rc = DISQueryParamVal(pRegFrame, pCpu, &pCpu->param2, ¶m2, PARAM_SOURCE); if(VBOX_FAILURE(rc)) return VERR_EM_INTERPRETER; if (pCpu->param1.size != pCpu->param2.size) { AssertMsgReturn(pCpu->param1.size >= pCpu->param2.size, /* should never happen! */ ("%s at %VGv parameter mismatch %d vs %d!!\n", emGetMnemonic(pCpu), pRegFrame->eip, pCpu->param1.size, pCpu->param2.size), VERR_EM_INTERPRETER); /* Or %Ev, Ib -> just a hack to save some space; the data width of the 1st parameter determines the real width */ pCpu->param2.size = pCpu->param1.size; param2.size = param1.size; } /* The destination is always a virtual address */ AssertReturn(param1.type == PARMTYPE_ADDRESS, VERR_EM_INTERPRETER); RTGCPTR GCPtrPar1 = (RTGCPTR)param1.val.val32; GCPtrPar1 = emConvertToFlatAddr(pVM, pRegFrame, pCpu, &pCpu->param1, GCPtrPar1); # ifdef IN_GC /* Safety check (in theory it could cross a page boundary and fault there though) */ Assert( TRPMHasTrap(pVM) && (TRPMGetErrorCode(pVM) & X86_TRAP_PF_RW)); AssertMsgReturn(GCPtrPar1 == pvFault, ("eip=%VGv, GCPtrPar1=%VGv pvFault=%VGv\n", pRegFrame->eip, GCPtrPar1, pvFault), VERR_EM_INTERPRETER); # endif /* Register and immediate data == PARMTYPE_IMMEDIATE */ AssertReturn(param2.type == PARMTYPE_IMMEDIATE, VERR_EM_INTERPRETER); RTGCUINTREG ValPar2 = param2.val.val32; /* Try emulate it with a one-shot #PF handler in place. */ Log2(("%s %RGv imm%d=%RGr\n", emGetMnemonic(pCpu), GCPtrPar1, pCpu->param2.size*8, ValPar2)); RTGCUINTREG eflags = 0; MMGCRamRegisterTrapHandler(pVM); rc = pfnEmulate(GCPtrPar1, ValPar2, pCpu->param2.size, &eflags); MMGCRamDeregisterTrapHandler(pVM); if (RT_FAILURE(rc)) { Log(("%s %RGv imm%d=%RGr -> emulation failed due to page fault!\n", emGetMnemonic(pCpu), GCPtrPar1, pCpu->param2.size*8, ValPar2)); return VERR_EM_INTERPRETER; } /* Update guest's eflags and finish. */ pRegFrame->eflags.u32 = (pRegFrame->eflags.u32 & ~(X86_EFL_CF | X86_EFL_PF | X86_EFL_AF | X86_EFL_ZF | X86_EFL_SF | X86_EFL_OF)) | (eflags & (X86_EFL_CF | X86_EFL_PF | X86_EFL_AF | X86_EFL_ZF | X86_EFL_SF | X86_EFL_OF)); *pcbSize = param2.size; return VINF_SUCCESS; } #endif /** * ADD, ADC & SUB Emulation. */ static int emInterpretAddSub(PVM pVM, PDISCPUSTATE pCpu, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, uint32_t *pcbSize, PFN_EMULATE_PARAM3 pfnEmulate) { OP_PARAMVAL param1, param2; int rc = DISQueryParamVal(pRegFrame, pCpu, &pCpu->param1, ¶m1, PARAM_DEST); if(VBOX_FAILURE(rc)) return VERR_EM_INTERPRETER; rc = DISQueryParamVal(pRegFrame, pCpu, &pCpu->param2, ¶m2, PARAM_SOURCE); if(VBOX_FAILURE(rc)) return VERR_EM_INTERPRETER; #ifdef DEBUG const char *pszInstr; if (pCpu->pCurInstr->opcode == OP_SUB) pszInstr = "Sub"; else if (pCpu->pCurInstr->opcode == OP_ADD) pszInstr = "Add"; else if (pCpu->pCurInstr->opcode == OP_ADC) pszInstr = "Adc"; #endif #ifdef IN_GC if (TRPMHasTrap(pVM)) { if (TRPMGetErrorCode(pVM) & X86_TRAP_PF_RW) { #endif RTGCPTR pParam1; uint32_t valpar1, valpar2; if (pCpu->param1.size != pCpu->param2.size) { if (pCpu->param1.size < pCpu->param2.size) { AssertMsgFailed(("%s at %VGv parameter mismatch %d vs %d!!\n", pszInstr, pRegFrame->eip, pCpu->param1.size, pCpu->param2.size)); /* should never happen! */ return VERR_EM_INTERPRETER; } /* Or %Ev, Ib -> just a hack to save some space; the data width of the 1st parameter determines the real width */ pCpu->param2.size = pCpu->param1.size; param2.size = param1.size; } /* The destination is always a virtual address */ if (param1.type == PARMTYPE_ADDRESS) { pParam1 = (RTGCPTR)param1.val.val32; pParam1 = emConvertToFlatAddr(pVM, pRegFrame, pCpu, &pCpu->param1, pParam1); #ifdef IN_GC /* Safety check (in theory it could cross a page boundary and fault there though) */ AssertReturn(pParam1 == pvFault, VERR_EM_INTERPRETER); #endif rc = emRamRead(pVM, &valpar1, pParam1, param1.size); if (VBOX_FAILURE(rc)) { AssertMsgFailed(("emRamRead %VGv size=%d failed with %Vrc\n", pParam1, param1.size, rc)); return VERR_EM_INTERPRETER; } } else { #ifndef DEBUG_bird AssertFailed(); #endif return VERR_EM_INTERPRETER; } /* Register or immediate data */ switch(param2.type) { case PARMTYPE_IMMEDIATE: /* both immediate data and register (ugly) */ valpar2 = param2.val.val32; break; default: AssertFailed(); return VERR_EM_INTERPRETER; } /* Data read, emulate instruction. */ uint32_t eflags = pfnEmulate(&valpar1, valpar2, param2.size); /* Update guest's eflags and finish. */ pRegFrame->eflags.u32 = (pRegFrame->eflags.u32 & ~(X86_EFL_CF | X86_EFL_PF | X86_EFL_AF | X86_EFL_ZF | X86_EFL_SF | X86_EFL_OF)) | (eflags & (X86_EFL_CF | X86_EFL_PF | X86_EFL_AF | X86_EFL_ZF | X86_EFL_SF | X86_EFL_OF)); /* And write it back */ rc = emRamWrite(pVM, pParam1, &valpar1, param1.size); if (VBOX_SUCCESS(rc)) { /* All done! */ *pcbSize = param2.size; return VINF_SUCCESS; } #ifdef IN_GC } } #endif return VERR_EM_INTERPRETER; } /** * ADC Emulation. */ static int emInterpretAdc(PVM pVM, PDISCPUSTATE pCpu, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, uint32_t *pcbSize) { if (pRegFrame->eflags.Bits.u1CF) return emInterpretAddSub(pVM, pCpu, pRegFrame, pvFault, pcbSize, EMEmulateAdcWithCarrySet); else return emInterpretAddSub(pVM, pCpu, pRegFrame, pvFault, pcbSize, EMEmulateAdd); } /** * BTR/C/S Emulation. */ static int emInterpretBitTest(PVM pVM, PDISCPUSTATE pCpu, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, uint32_t *pcbSize, PFN_EMULATE_PARAM2_UINT32 pfnEmulate) { OP_PARAMVAL param1, param2; int rc = DISQueryParamVal(pRegFrame, pCpu, &pCpu->param1, ¶m1, PARAM_DEST); if(VBOX_FAILURE(rc)) return VERR_EM_INTERPRETER; rc = DISQueryParamVal(pRegFrame, pCpu, &pCpu->param2, ¶m2, PARAM_SOURCE); if(VBOX_FAILURE(rc)) return VERR_EM_INTERPRETER; #ifdef LOG_ENABLED const char *pszInstr; if (pCpu->pCurInstr->opcode == OP_BTR) pszInstr = "Btr"; else if (pCpu->pCurInstr->opcode == OP_BTS) pszInstr = "Bts"; else if (pCpu->pCurInstr->opcode == OP_BTC) pszInstr = "Btc"; #endif #ifdef IN_GC if (TRPMHasTrap(pVM)) { if (TRPMGetErrorCode(pVM) & X86_TRAP_PF_RW) { #endif RTGCPTR pParam1; uint32_t valpar1 = 0, valpar2; uint32_t eflags; /* The destination is always a virtual address */ if (param1.type != PARMTYPE_ADDRESS) return VERR_EM_INTERPRETER; pParam1 = (RTGCPTR)param1.val.val32; pParam1 = emConvertToFlatAddr(pVM, pRegFrame, pCpu, &pCpu->param1, pParam1); /* Register or immediate data */ switch(param2.type) { case PARMTYPE_IMMEDIATE: /* both immediate data and register (ugly) */ valpar2 = param2.val.val32; break; default: AssertFailed(); return VERR_EM_INTERPRETER; } Log2(("emInterpret%s: pvFault=%VGv pParam1=%VGv val2=%x\n", pszInstr, pvFault, pParam1, valpar2)); pParam1 = (RTGCPTR)((RTGCUINTPTR)pParam1 + valpar2/8); #ifdef IN_GC /* Safety check. */ AssertMsgReturn((RTGCPTR)((RTGCUINTPTR)pParam1 & ~3) == pvFault, ("pParam1=%VGv pvFault=%VGv\n", pParam1, pvFault), VERR_EM_INTERPRETER); #endif rc = emRamRead(pVM, &valpar1, pParam1, 1); if (VBOX_FAILURE(rc)) { AssertMsgFailed(("emRamRead %VGv size=%d failed with %Vrc\n", pParam1, param1.size, rc)); return VERR_EM_INTERPRETER; } Log2(("emInterpretBtx: val=%x\n", valpar1)); /* Data read, emulate bit test instruction. */ eflags = pfnEmulate(&valpar1, valpar2 & 0x7); Log2(("emInterpretBtx: val=%x CF=%d\n", valpar1, !!(eflags & X86_EFL_CF))); /* Update guest's eflags and finish. */ pRegFrame->eflags.u32 = (pRegFrame->eflags.u32 & ~(X86_EFL_CF | X86_EFL_PF | X86_EFL_AF | X86_EFL_ZF | X86_EFL_SF | X86_EFL_OF)) | (eflags & (X86_EFL_CF | X86_EFL_PF | X86_EFL_AF | X86_EFL_ZF | X86_EFL_SF | X86_EFL_OF)); /* And write it back */ rc = emRamWrite(pVM, pParam1, &valpar1, 1); if (VBOX_SUCCESS(rc)) { /* All done! */ *pcbSize = 1; return VINF_SUCCESS; } #ifdef IN_GC } } #endif return VERR_EM_INTERPRETER; } #ifdef IN_GC /** * LOCK BTR/C/S Emulation. */ static int emInterpretLockBitTest(PVM pVM, PDISCPUSTATE pCpu, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, uint32_t *pcbSize, PFNEMULATELOCKPARAM2 pfnEmulate) { OP_PARAMVAL param1, param2; int rc = DISQueryParamVal(pRegFrame, pCpu, &pCpu->param1, ¶m1, PARAM_DEST); if(VBOX_FAILURE(rc)) return VERR_EM_INTERPRETER; rc = DISQueryParamVal(pRegFrame, pCpu, &pCpu->param2, ¶m2, PARAM_SOURCE); if(VBOX_FAILURE(rc)) return VERR_EM_INTERPRETER; /* The destination is always a virtual address */ if (param1.type != PARMTYPE_ADDRESS) return VERR_EM_INTERPRETER; RTGCPTR GCPtrPar1 = (RTGCPTR)param1.val.val32; GCPtrPar1 = emConvertToFlatAddr(pVM, pRegFrame, pCpu, &pCpu->param1, GCPtrPar1); /* Register and immediate data == PARMTYPE_IMMEDIATE */ AssertReturn(param2.type == PARMTYPE_IMMEDIATE, VERR_EM_INTERPRETER); RTGCUINTREG ValPar2 = param2.val.val32; Log2(("emInterpretLockBitTest %s: pvFault=%VGv GCPtrPar1=%RGv imm=%RGr\n", emGetMnemonic(pCpu), pvFault, GCPtrPar1, ValPar2)); /* Adjust the parameters so what we're dealing with is a bit within the byte pointed to. */ GCPtrPar1 = (RTGCPTR)((RTGCUINTPTR)GCPtrPar1 + ValPar2 / 8); ValPar2 &= 7; # ifdef IN_GC Assert(TRPMHasTrap(pVM)); AssertMsgReturn((RTGCPTR)((RTGCUINTPTR)GCPtrPar1 & ~(RTGCUINTPTR)3) == pvFault, ("GCPtrPar1=%VGv pvFault=%VGv\n", GCPtrPar1, pvFault), VERR_EM_INTERPRETER); # endif /* Try emulate it with a one-shot #PF handler in place. */ RTGCUINTREG eflags = 0; MMGCRamRegisterTrapHandler(pVM); rc = pfnEmulate(GCPtrPar1, ValPar2, &eflags); MMGCRamDeregisterTrapHandler(pVM); if (RT_FAILURE(rc)) { Log(("emInterpretLockBitTest %s: %RGv imm%d=%RGr -> emulation failed due to page fault!\n", emGetMnemonic(pCpu), GCPtrPar1, pCpu->param2.size*8, ValPar2)); return VERR_EM_INTERPRETER; } Log2(("emInterpretLockBitTest %s: GCPtrPar1=%RGv imm=%RGr CF=%d\n", emGetMnemonic(pCpu), GCPtrPar1, ValPar2, !!(eflags & X86_EFL_CF))); /* Update guest's eflags and finish. */ pRegFrame->eflags.u32 = (pRegFrame->eflags.u32 & ~(X86_EFL_CF | X86_EFL_PF | X86_EFL_AF | X86_EFL_ZF | X86_EFL_SF | X86_EFL_OF)) | (eflags & (X86_EFL_CF | X86_EFL_PF | X86_EFL_AF | X86_EFL_ZF | X86_EFL_SF | X86_EFL_OF)); *pcbSize = 1; return VINF_SUCCESS; } #endif /* IN_GC */ /** * MOV emulation. */ static int emInterpretMov(PVM pVM, PDISCPUSTATE pCpu, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, uint32_t *pcbSize) { OP_PARAMVAL param1, param2; int rc = DISQueryParamVal(pRegFrame, pCpu, &pCpu->param1, ¶m1, PARAM_DEST); if(VBOX_FAILURE(rc)) return VERR_EM_INTERPRETER; rc = DISQueryParamVal(pRegFrame, pCpu, &pCpu->param2, ¶m2, PARAM_SOURCE); if(VBOX_FAILURE(rc)) return VERR_EM_INTERPRETER; #ifdef IN_GC if (TRPMHasTrap(pVM)) { if (TRPMGetErrorCode(pVM) & X86_TRAP_PF_RW) { #else /** @todo Make this the default and don't rely on TRPM information. */ if (param1.type == PARMTYPE_ADDRESS) { #endif RTGCPTR pDest; uint32_t val32; switch(param1.type) { case PARMTYPE_IMMEDIATE: if(!(param1.flags & PARAM_VAL32)) return VERR_EM_INTERPRETER; /* fallthru */ case PARMTYPE_ADDRESS: pDest = (RTGCPTR)param1.val.val32; pDest = emConvertToFlatAddr(pVM, pRegFrame, pCpu, &pCpu->param1, pDest); break; default: AssertFailed(); return VERR_EM_INTERPRETER; } switch(param2.type) { case PARMTYPE_IMMEDIATE: /* register type is translated to this one too */ val32 = param2.val.val32; break; default: Log(("emInterpretMov: unexpected type=%d eip=%VGv\n", param2.type, pRegFrame->eip)); return VERR_EM_INTERPRETER; } LogFlow(("EMInterpretInstruction at %08x: OP_MOV %08X <- %08X (%d) &val32=%08x\n", pRegFrame->eip, pDest, val32, param2.size, &val32)); Assert(param2.size <= 4 && param2.size > 0); #if 0 /* CSAM/PATM translates aliases which causes this to incorrectly trigger. See #2609 and #1498. */ #ifdef IN_GC /* Safety check (in theory it could cross a page boundary and fault there though) */ AssertMsgReturn(pDest == pvFault, ("eip=%VGv pDest=%VGv pvFault=%VGv\n", pRegFrame->eip, pDest, pvFault), VERR_EM_INTERPRETER); #endif #endif rc = emRamWrite(pVM, pDest, &val32, param2.size); if (VBOX_FAILURE(rc)) return VERR_EM_INTERPRETER; *pcbSize = param2.size; } else { /* read fault */ RTGCPTR pSrc; uint32_t val32; /* Source */ switch(param2.type) { case PARMTYPE_IMMEDIATE: if(!(param2.flags & PARAM_VAL32)) return VERR_EM_INTERPRETER; /* fallthru */ case PARMTYPE_ADDRESS: pSrc = (RTGCPTR)param2.val.val32; pSrc = emConvertToFlatAddr(pVM, pRegFrame, pCpu, &pCpu->param2, pSrc); break; default: return VERR_EM_INTERPRETER; } Assert(param1.size <= 4 && param1.size > 0); #ifdef IN_GC /* Safety check (in theory it could cross a page boundary and fault there though) */ AssertReturn(pSrc == pvFault, VERR_EM_INTERPRETER); #endif rc = emRamRead(pVM, &val32, pSrc, param1.size); if (VBOX_FAILURE(rc)) return VERR_EM_INTERPRETER; /* Destination */ switch(param1.type) { case PARMTYPE_REGISTER: switch(param1.size) { case 1: rc = DISWriteReg8(pRegFrame, pCpu->param1.base.reg_gen8, (uint8_t)val32); break; case 2: rc = DISWriteReg16(pRegFrame, pCpu->param1.base.reg_gen16, (uint16_t)val32); break; case 4: rc = DISWriteReg32(pRegFrame, pCpu->param1.base.reg_gen32, val32); break; default: return VERR_EM_INTERPRETER; } if (VBOX_FAILURE(rc)) return rc; break; default: return VERR_EM_INTERPRETER; } LogFlow(("EMInterpretInstruction: OP_MOV %08X -> %08X (%d)\n", pSrc, val32, param1.size)); } return VINF_SUCCESS; #ifdef IN_GC } #endif return VERR_EM_INTERPRETER; } /* * [LOCK] CMPXCHG emulation. */ #ifdef IN_GC static int emInterpretCmpXchg(PVM pVM, PDISCPUSTATE pCpu, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, uint32_t *pcbSize) { OP_PARAMVAL param1, param2; #ifdef LOG_ENABLED char *pszInstr; if (pCpu->prefix & PREFIX_LOCK) pszInstr = "Lock CmpXchg"; else pszInstr = "CmpXchg"; #endif /* Source to make DISQueryParamVal read the register value - ugly hack */ int rc = DISQueryParamVal(pRegFrame, pCpu, &pCpu->param1, ¶m1, PARAM_SOURCE); if(VBOX_FAILURE(rc)) return VERR_EM_INTERPRETER; rc = DISQueryParamVal(pRegFrame, pCpu, &pCpu->param2, ¶m2, PARAM_SOURCE); if(VBOX_FAILURE(rc)) return VERR_EM_INTERPRETER; if (TRPMHasTrap(pVM)) { if (TRPMGetErrorCode(pVM) & X86_TRAP_PF_RW) { RTGCPTR pParam1; uint32_t valpar, eflags; #ifdef VBOX_STRICT uint32_t valpar1 = 0; /// @todo used uninitialized... #endif AssertReturn(pCpu->param1.size == pCpu->param2.size, VERR_EM_INTERPRETER); switch(param1.type) { case PARMTYPE_ADDRESS: pParam1 = (RTGCPTR)param1.val.val32; pParam1 = emConvertToFlatAddr(pVM, pRegFrame, pCpu, &pCpu->param1, pParam1); /* Safety check (in theory it could cross a page boundary and fault there though) */ AssertMsgReturn(pParam1 == pvFault, ("eip=%VGv pParam1=%VGv pvFault=%VGv\n", pRegFrame->eip, pParam1, pvFault), VERR_EM_INTERPRETER); break; default: return VERR_EM_INTERPRETER; } switch(param2.type) { case PARMTYPE_IMMEDIATE: /* register actually */ valpar = param2.val.val32; break; default: return VERR_EM_INTERPRETER; } LogFlow(("%s %VGv=%08x eax=%08x %08x\n", pszInstr, pParam1, valpar1, pRegFrame->eax, valpar)); MMGCRamRegisterTrapHandler(pVM); if (pCpu->prefix & PREFIX_LOCK) rc = EMGCEmulateLockCmpXchg(pParam1, &pRegFrame->eax, valpar, pCpu->param2.size, &eflags); else rc = EMGCEmulateCmpXchg(pParam1, &pRegFrame->eax, valpar, pCpu->param2.size, &eflags); MMGCRamDeregisterTrapHandler(pVM); if (VBOX_FAILURE(rc)) { Log(("%s %VGv=%08x eax=%08x %08x -> emulation failed due to page fault!\n", pszInstr, pParam1, valpar1, pRegFrame->eax, valpar)); return VERR_EM_INTERPRETER; } LogFlow(("%s %VGv=%08x eax=%08x %08x ZF=%d\n", pszInstr, pParam1, valpar1, pRegFrame->eax, valpar, !!(eflags & X86_EFL_ZF))); /* Update guest's eflags and finish. */ pRegFrame->eflags.u32 = (pRegFrame->eflags.u32 & ~(X86_EFL_CF | X86_EFL_PF | X86_EFL_AF | X86_EFL_ZF | X86_EFL_SF | X86_EFL_OF)) | (eflags & (X86_EFL_CF | X86_EFL_PF | X86_EFL_AF | X86_EFL_ZF | X86_EFL_SF | X86_EFL_OF)); *pcbSize = param2.size; return VINF_SUCCESS; } } return VERR_EM_INTERPRETER; } /* * [LOCK] CMPXCHG8B emulation. */ static int emInterpretCmpXchg8b(PVM pVM, PDISCPUSTATE pCpu, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, uint32_t *pcbSize) { OP_PARAMVAL param1; #ifdef LOG_ENABLED char *pszInstr; if (pCpu->prefix & PREFIX_LOCK) pszInstr = "Lock CmpXchg8b"; else pszInstr = "CmpXchg8b"; #endif /* Source to make DISQueryParamVal read the register value - ugly hack */ int rc = DISQueryParamVal(pRegFrame, pCpu, &pCpu->param1, ¶m1, PARAM_SOURCE); if(VBOX_FAILURE(rc)) return VERR_EM_INTERPRETER; if (TRPMHasTrap(pVM)) { if (TRPMGetErrorCode(pVM) & X86_TRAP_PF_RW) { RTGCPTR pParam1; uint32_t eflags; AssertReturn(pCpu->param1.size == 8, VERR_EM_INTERPRETER); switch(param1.type) { case PARMTYPE_ADDRESS: pParam1 = (RTGCPTR)param1.val.val32; pParam1 = emConvertToFlatAddr(pVM, pRegFrame, pCpu, &pCpu->param1, pParam1); /* Safety check (in theory it could cross a page boundary and fault there though) */ AssertMsgReturn(pParam1 == pvFault, ("eip=%VGv pParam1=%VGv pvFault=%VGv\n", pRegFrame->eip, pParam1, pvFault), VERR_EM_INTERPRETER); break; default: return VERR_EM_INTERPRETER; } LogFlow(("%s %VGv=%08x eax=%08x\n", pszInstr, pParam1, pRegFrame->eax)); MMGCRamRegisterTrapHandler(pVM); if (pCpu->prefix & PREFIX_LOCK) rc = EMGCEmulateLockCmpXchg8b(pParam1, &pRegFrame->eax, &pRegFrame->edx, pRegFrame->ebx, pRegFrame->ecx, &eflags); else rc = EMGCEmulateCmpXchg8b(pParam1, &pRegFrame->eax, &pRegFrame->edx, pRegFrame->ebx, pRegFrame->ecx, &eflags); MMGCRamDeregisterTrapHandler(pVM); if (VBOX_FAILURE(rc)) { Log(("%s %VGv=%08x eax=%08x -> emulation failed due to page fault!\n", pszInstr, pParam1, pRegFrame->eax)); return VERR_EM_INTERPRETER; } LogFlow(("%s %VGv=%08x eax=%08x ZF=%d\n", pszInstr, pParam1, pRegFrame->eax, !!(eflags & X86_EFL_ZF))); /* Update guest's eflags and finish. */ pRegFrame->eflags.u32 = (pRegFrame->eflags.u32 & ~(X86_EFL_CF | X86_EFL_PF | X86_EFL_AF | X86_EFL_ZF | X86_EFL_SF | X86_EFL_OF)) | (eflags & (X86_EFL_CF | X86_EFL_PF | X86_EFL_AF | X86_EFL_ZF | X86_EFL_SF | X86_EFL_OF)); *pcbSize = 8; return VINF_SUCCESS; } } return VERR_EM_INTERPRETER; } #endif /* * [LOCK] XADD emulation. */ #ifdef IN_GC static int emInterpretXAdd(PVM pVM, PDISCPUSTATE pCpu, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, uint32_t *pcbSize) { OP_PARAMVAL param1; uint32_t *pParamReg2; size_t cbSizeParamReg2; /* Source to make DISQueryParamVal read the register value - ugly hack */ int rc = DISQueryParamVal(pRegFrame, pCpu, &pCpu->param1, ¶m1, PARAM_SOURCE); if(VBOX_FAILURE(rc)) return VERR_EM_INTERPRETER; rc = DISQueryParamRegPtr(pRegFrame, pCpu, &pCpu->param2, (void **)&pParamReg2, &cbSizeParamReg2); Assert(cbSizeParamReg2 <= 4); if(VBOX_FAILURE(rc)) return VERR_EM_INTERPRETER; if (TRPMHasTrap(pVM)) { if (TRPMGetErrorCode(pVM) & X86_TRAP_PF_RW) { RTGCPTR pParam1; uint32_t eflags; #ifdef VBOX_STRICT uint32_t valpar1 = 0; /// @todo used uninitialized... #endif AssertReturn(pCpu->param1.size == pCpu->param2.size, VERR_EM_INTERPRETER); switch(param1.type) { case PARMTYPE_ADDRESS: pParam1 = (RTGCPTR)param1.val.val32; pParam1 = emConvertToFlatAddr(pVM, pRegFrame, pCpu, &pCpu->param1, pParam1); /* Safety check (in theory it could cross a page boundary and fault there though) */ AssertMsgReturn(pParam1 == pvFault, ("eip=%VGv pParam1=%VGv pvFault=%VGv\n", pRegFrame->eip, pParam1, pvFault), VERR_EM_INTERPRETER); break; default: return VERR_EM_INTERPRETER; } LogFlow(("XAdd %VGv=%08x reg=%08x\n", pParam1, *pParamReg2)); MMGCRamRegisterTrapHandler(pVM); if (pCpu->prefix & PREFIX_LOCK) rc = EMGCEmulateLockXAdd(pParam1, pParamReg2, cbSizeParamReg2, &eflags); else rc = EMGCEmulateXAdd(pParam1, pParamReg2, cbSizeParamReg2, &eflags); MMGCRamDeregisterTrapHandler(pVM); if (VBOX_FAILURE(rc)) { Log(("XAdd %VGv=%08x reg=%08x -> emulation failed due to page fault!\n", pParam1, valpar1, *pParamReg2)); return VERR_EM_INTERPRETER; } LogFlow(("XAdd %VGv=%08x reg=%08x ZF=%d\n", pParam1, valpar1, *pParamReg2, !!(eflags & X86_EFL_ZF))); /* Update guest's eflags and finish. */ pRegFrame->eflags.u32 = (pRegFrame->eflags.u32 & ~(X86_EFL_CF | X86_EFL_PF | X86_EFL_AF | X86_EFL_ZF | X86_EFL_SF | X86_EFL_OF)) | (eflags & (X86_EFL_CF | X86_EFL_PF | X86_EFL_AF | X86_EFL_ZF | X86_EFL_SF | X86_EFL_OF)); *pcbSize = cbSizeParamReg2; return VINF_SUCCESS; } } return VERR_EM_INTERPRETER; } #endif /** * Interpret IRET (currently only to V86 code) * * @returns VBox status code. * @param pVM The VM handle. * @param pRegFrame The register frame. * */ EMDECL(int) EMInterpretIret(PVM pVM, PCPUMCTXCORE pRegFrame) { RTGCUINTPTR pIretStack = (RTGCUINTPTR)pRegFrame->esp; RTGCUINTPTR eip, cs, esp, ss, eflags, ds, es, fs, gs, uMask; int rc; rc = emRamRead(pVM, &eip, (RTGCPTR)pIretStack , 4); rc |= emRamRead(pVM, &cs, (RTGCPTR)(pIretStack + 4), 4); rc |= emRamRead(pVM, &eflags, (RTGCPTR)(pIretStack + 8), 4); AssertRCReturn(rc, VERR_EM_INTERPRETER); AssertReturn(eflags & X86_EFL_VM, VERR_EM_INTERPRETER); rc |= emRamRead(pVM, &esp, (RTGCPTR)(pIretStack + 12), 4); rc |= emRamRead(pVM, &ss, (RTGCPTR)(pIretStack + 16), 4); rc |= emRamRead(pVM, &es, (RTGCPTR)(pIretStack + 20), 4); rc |= emRamRead(pVM, &ds, (RTGCPTR)(pIretStack + 24), 4); rc |= emRamRead(pVM, &fs, (RTGCPTR)(pIretStack + 28), 4); rc |= emRamRead(pVM, &gs, (RTGCPTR)(pIretStack + 32), 4); AssertRCReturn(rc, VERR_EM_INTERPRETER); pRegFrame->eip = eip & 0xffff; pRegFrame->cs = cs; /* Mask away all reserved bits */ uMask = X86_EFL_CF | X86_EFL_PF | X86_EFL_AF | X86_EFL_ZF | X86_EFL_SF | X86_EFL_TF | X86_EFL_IF | X86_EFL_DF | X86_EFL_OF | X86_EFL_IOPL | X86_EFL_NT | X86_EFL_RF | X86_EFL_VM | X86_EFL_AC | X86_EFL_VIF | X86_EFL_VIP | X86_EFL_ID; eflags &= uMask; #ifndef IN_RING0 CPUMRawSetEFlags(pVM, pRegFrame, eflags); #endif Assert((pRegFrame->eflags.u32 & (X86_EFL_IF|X86_EFL_IOPL)) == X86_EFL_IF); pRegFrame->esp = esp; pRegFrame->ss = ss; pRegFrame->ds = ds; pRegFrame->es = es; pRegFrame->fs = fs; pRegFrame->gs = gs; return VINF_SUCCESS; } /** * IRET Emulation. */ static int emInterpretIret(PVM pVM, PDISCPUSTATE pCpu, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, uint32_t *pcbSize) { /* only allow direct calls to EMInterpretIret for now */ return VERR_EM_INTERPRETER; } /** * INVLPG Emulation. */ /** * Interpret INVLPG * * @returns VBox status code. * @param pVM The VM handle. * @param pRegFrame The register frame. * @param pAddrGC Operand address * */ EMDECL(int) EMInterpretInvlpg(PVM pVM, PCPUMCTXCORE pRegFrame, RTGCPTR pAddrGC) { int rc; /** @todo is addr always a flat linear address or ds based * (in absence of segment override prefixes)???? */ #ifdef IN_GC // Note: we could also use PGMFlushPage here, but it currently doesn't always use invlpg!!!!!!!!!! LogFlow(("GC: EMULATE: invlpg %08X\n", pAddrGC)); rc = PGMGCInvalidatePage(pVM, pAddrGC); #else rc = PGMInvalidatePage(pVM, pAddrGC); #endif if (VBOX_SUCCESS(rc)) return VINF_SUCCESS; Log(("PGMInvalidatePage %VGv returned %VGv (%d)\n", pAddrGC, rc, rc)); Assert(rc == VERR_REM_FLUSHED_PAGES_OVERFLOW); /** @todo r=bird: we shouldn't ignore returns codes like this... I'm 99% sure the error is fatal. */ return VERR_EM_INTERPRETER; } static int emInterpretInvlPg(PVM pVM, PDISCPUSTATE pCpu, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, uint32_t *pcbSize) { OP_PARAMVAL param1; RTGCPTR addr; int rc = DISQueryParamVal(pRegFrame, pCpu, &pCpu->param1, ¶m1, PARAM_SOURCE); if(VBOX_FAILURE(rc)) return VERR_EM_INTERPRETER; switch(param1.type) { case PARMTYPE_IMMEDIATE: case PARMTYPE_ADDRESS: if(!(param1.flags & PARAM_VAL32)) return VERR_EM_INTERPRETER; addr = (RTGCPTR)param1.val.val32; break; default: return VERR_EM_INTERPRETER; } /** @todo is addr always a flat linear address or ds based * (in absence of segment override prefixes)???? */ #ifdef IN_GC // Note: we could also use PGMFlushPage here, but it currently doesn't always use invlpg!!!!!!!!!! LogFlow(("GC: EMULATE: invlpg %08X\n", addr)); rc = PGMGCInvalidatePage(pVM, addr); #else rc = PGMInvalidatePage(pVM, addr); #endif if (VBOX_SUCCESS(rc)) return VINF_SUCCESS; /** @todo r=bird: we shouldn't ignore returns codes like this... I'm 99% sure the error is fatal. */ return VERR_EM_INTERPRETER; } /** * CPUID Emulation. */ /** * Interpret CPUID given the parameters in the CPU context * * @returns VBox status code. * @param pVM The VM handle. * @param pRegFrame The register frame. * */ EMDECL(int) EMInterpretCpuId(PVM pVM, PCPUMCTXCORE pRegFrame) { CPUMGetGuestCpuId(pVM, pRegFrame->eax, &pRegFrame->eax, &pRegFrame->ebx, &pRegFrame->ecx, &pRegFrame->edx); return VINF_SUCCESS; } static int emInterpretCpuId(PVM pVM, PDISCPUSTATE pCpu, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, uint32_t *pcbSize) { uint32_t iLeaf = pRegFrame->eax; NOREF(iLeaf); int rc = EMInterpretCpuId(pVM, pRegFrame); Log(("Emulate: CPUID %x -> %08x %08x %08x %08x\n", iLeaf, pRegFrame->eax, pRegFrame->ebx, pRegFrame->ecx, pRegFrame->edx)); return rc; } /** * MOV CRx Emulation. */ /** * Interpret CRx read * * @returns VBox status code. * @param pVM The VM handle. * @param pRegFrame The register frame. * @param DestRegGen General purpose register index (USE_REG_E**)) * @param SrcRegCRx CRx register index (USE_REG_CR*) * */ EMDECL(int) EMInterpretCRxRead(PVM pVM, PCPUMCTXCORE pRegFrame, uint32_t DestRegGen, uint32_t SrcRegCrx) { uint64_t val64; int rc = CPUMGetGuestCRx(pVM, SrcRegCrx, &val64); AssertMsgRCReturn(rc, ("CPUMGetGuestCRx %d failed\n", SrcRegCrx), VERR_EM_INTERPRETER); /** @todo AMD64 */ rc = DISWriteReg32(pRegFrame, DestRegGen, val64); if(VBOX_SUCCESS(rc)) { LogFlow(("MOV_CR: gen32=%d CR=%d val=%VX64\n", DestRegGen, SrcRegCrx, val64)); return VINF_SUCCESS; } return VERR_EM_INTERPRETER; } /** * Interpret LMSW * * @returns VBox status code. * @param pVM The VM handle. * @param u16Data LMSW source data. * */ EMDECL(int) EMInterpretLMSW(PVM pVM, uint16_t u16Data) { uint32_t OldCr0 = CPUMGetGuestCR0(pVM); /* don't use this path to go into protected mode! */ Assert(OldCr0 & X86_CR0_PE); if (!(OldCr0 & X86_CR0_PE)) return VERR_EM_INTERPRETER; /* Only PE, MP, EM and TS can be changed; note that PE can't be cleared by this instruction. */ uint32_t NewCr0 = ( OldCr0 & ~( X86_CR0_MP | X86_CR0_EM | X86_CR0_TS)) | (u16Data & (X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS)); #ifdef IN_GC /* Need to change the hyper CR0? Doing it the lazy way then. */ if ( (OldCr0 & (X86_CR0_AM | X86_CR0_WP)) != (NewCr0 & (X86_CR0_AM | X86_CR0_WP))) { Log(("EMInterpretLMSW: CR0: %#x->%#x => R3\n", OldCr0, NewCr0)); VM_FF_SET(pVM, VM_FF_TO_R3); } #endif return CPUMSetGuestCR0(pVM, NewCr0); } /** * Interpret CLTS * * @returns VBox status code. * @param pVM The VM handle. * */ EMDECL(int) EMInterpretCLTS(PVM pVM) { uint32_t cr0 = CPUMGetGuestCR0(pVM); if (!(cr0 & X86_CR0_TS)) return VINF_SUCCESS; return CPUMSetGuestCR0(pVM, cr0 & ~X86_CR0_TS); } static int emInterpretClts(PVM pVM, PDISCPUSTATE pCpu, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, uint32_t *pcbSize) { return EMInterpretCLTS(pVM); } /** * Interpret CRx write * * @returns VBox status code. * @param pVM The VM handle. * @param pRegFrame The register frame. * @param DestRegCRx CRx register index (USE_REG_CR*) * @param SrcRegGen General purpose register index (USE_REG_E**)) * */ EMDECL(int) EMInterpretCRxWrite(PVM pVM, PCPUMCTXCORE pRegFrame, uint32_t DestRegCrx, uint32_t SrcRegGen) { uint32_t val32; uint32_t oldval; /** @todo Clean up this mess. */ /** @todo AMD64 */ int rc = DISFetchReg32(pRegFrame, SrcRegGen, &val32); if (VBOX_SUCCESS(rc)) { switch (DestRegCrx) { case USE_REG_CR0: oldval = CPUMGetGuestCR0(pVM); #ifdef IN_GC /* CR0.WP and CR0.AM changes require a reschedule run in ring 3. */ if ( (val32 & (X86_CR0_WP | X86_CR0_AM)) != (oldval & (X86_CR0_WP | X86_CR0_AM))) return VERR_EM_INTERPRETER; #endif CPUMSetGuestCR0(pVM, val32); val32 = CPUMGetGuestCR0(pVM); if ( (oldval & (X86_CR0_PG | X86_CR0_WP | X86_CR0_PE)) != (val32 & (X86_CR0_PG | X86_CR0_WP | X86_CR0_PE))) { /* global flush */ rc = PGMFlushTLB(pVM, CPUMGetGuestCR3(pVM), true /* global */); AssertRCReturn(rc, rc); } return PGMChangeMode(pVM, CPUMGetGuestCR0(pVM), CPUMGetGuestCR4(pVM), CPUMGetGuestEFER(pVM)); case USE_REG_CR2: rc = CPUMSetGuestCR2(pVM, val32); AssertRC(rc); return VINF_SUCCESS; case USE_REG_CR3: /* Reloading the current CR3 means the guest just wants to flush the TLBs */ rc = CPUMSetGuestCR3(pVM, val32); AssertRC(rc); if (CPUMGetGuestCR0(pVM) & X86_CR0_PG) { /* flush */ rc = PGMFlushTLB(pVM, val32, !(CPUMGetGuestCR4(pVM) & X86_CR4_PGE)); AssertRCReturn(rc, rc); } return VINF_SUCCESS; case USE_REG_CR4: oldval = CPUMGetGuestCR4(pVM); rc = CPUMSetGuestCR4(pVM, val32); AssertRC(rc); val32 = CPUMGetGuestCR4(pVM); if ( (oldval & (X86_CR4_PGE|X86_CR4_PAE|X86_CR4_PSE)) != (val32 & (X86_CR4_PGE|X86_CR4_PAE|X86_CR4_PSE))) { /* global flush */ rc = PGMFlushTLB(pVM, CPUMGetGuestCR3(pVM), true /* global */); AssertRCReturn(rc, rc); } # ifdef IN_GC /* Feeling extremely lazy. */ if ( (oldval & (X86_CR4_OSFSXR|X86_CR4_OSXMMEEXCPT|X86_CR4_PCE|X86_CR4_MCE|X86_CR4_PAE|X86_CR4_DE|X86_CR4_TSD|X86_CR4_PVI|X86_CR4_VME)) != (val32 & (X86_CR4_OSFSXR|X86_CR4_OSXMMEEXCPT|X86_CR4_PCE|X86_CR4_MCE|X86_CR4_PAE|X86_CR4_DE|X86_CR4_TSD|X86_CR4_PVI|X86_CR4_VME))) { Log(("emInterpretMovCRx: CR4: %#x->%#x => R3\n", oldval, val32)); VM_FF_SET(pVM, VM_FF_TO_R3); } # endif return PGMChangeMode(pVM, CPUMGetGuestCR0(pVM), CPUMGetGuestCR4(pVM), CPUMGetGuestEFER(pVM)); default: AssertFailed(); case USE_REG_CR1: /* illegal op */ break; } } return VERR_EM_INTERPRETER; } static int emInterpretMovCRx(PVM pVM, PDISCPUSTATE pCpu, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, uint32_t *pcbSize) { if (pCpu->param1.flags == USE_REG_GEN32 && pCpu->param2.flags == USE_REG_CR) return EMInterpretCRxRead(pVM, pRegFrame, pCpu->param1.base.reg_gen32, pCpu->param2.base.reg_ctrl); if (pCpu->param1.flags == USE_REG_CR && pCpu->param2.flags == USE_REG_GEN32) return EMInterpretCRxWrite(pVM, pRegFrame, pCpu->param1.base.reg_ctrl, pCpu->param2.base.reg_gen32); AssertMsgFailedReturn(("Unexpected control register move\n"), VERR_EM_INTERPRETER); return VERR_EM_INTERPRETER; } /** * MOV DRx */ /** * Interpret DRx write * * @returns VBox status code. * @param pVM The VM handle. * @param pRegFrame The register frame. * @param DestRegDRx DRx register index (USE_REG_DR*) * @param SrcRegGen General purpose register index (USE_REG_E**)) * */ EMDECL(int) EMInterpretDRxWrite(PVM pVM, PCPUMCTXCORE pRegFrame, uint32_t DestRegDrx, uint32_t SrcRegGen) { uint32_t val32; int rc = DISFetchReg32(pRegFrame, SrcRegGen, &val32); if (VBOX_SUCCESS(rc)) { rc = CPUMSetGuestDRx(pVM, DestRegDrx, val32); if (VBOX_SUCCESS(rc)) return rc; AssertMsgFailed(("CPUMSetGuestDRx %d failed\n", DestRegDrx)); } return VERR_EM_INTERPRETER; } /** * Interpret DRx read * * @returns VBox status code. * @param pVM The VM handle. * @param pRegFrame The register frame. * @param DestRegGen General purpose register index (USE_REG_E**)) * @param SrcRegDRx DRx register index (USE_REG_DR*) * */ EMDECL(int) EMInterpretDRxRead(PVM pVM, PCPUMCTXCORE pRegFrame, uint32_t DestRegGen, uint32_t SrcRegDrx) { uint32_t val32; int rc = CPUMGetGuestDRx(pVM, SrcRegDrx, &val32); AssertMsgRCReturn(rc, ("CPUMGetGuestDRx %d failed\n", SrcRegDrx), VERR_EM_INTERPRETER); rc = DISWriteReg32(pRegFrame, DestRegGen, val32); if (VBOX_SUCCESS(rc)) return VINF_SUCCESS; return VERR_EM_INTERPRETER; } static int emInterpretMovDRx(PVM pVM, PDISCPUSTATE pCpu, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, uint32_t *pcbSize) { int rc = VERR_EM_INTERPRETER; if(pCpu->param1.flags == USE_REG_GEN32 && pCpu->param2.flags == USE_REG_DBG) { rc = EMInterpretDRxRead(pVM, pRegFrame, pCpu->param1.base.reg_gen32, pCpu->param2.base.reg_dbg); } else if(pCpu->param1.flags == USE_REG_DBG && pCpu->param2.flags == USE_REG_GEN32) { rc = EMInterpretDRxWrite(pVM, pRegFrame, pCpu->param1.base.reg_dbg, pCpu->param2.base.reg_gen32); } else AssertMsgFailed(("Unexpected debug register move\n")); return rc; } /** * LLDT Emulation. */ static int emInterpretLLdt(PVM pVM, PDISCPUSTATE pCpu, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, uint32_t *pcbSize) { OP_PARAMVAL param1; RTSEL sel; int rc = DISQueryParamVal(pRegFrame, pCpu, &pCpu->param1, ¶m1, PARAM_SOURCE); if(VBOX_FAILURE(rc)) return VERR_EM_INTERPRETER; switch(param1.type) { case PARMTYPE_ADDRESS: return VERR_EM_INTERPRETER; //feeling lazy right now case PARMTYPE_IMMEDIATE: if(!(param1.flags & PARAM_VAL16)) return VERR_EM_INTERPRETER; sel = (RTSEL)param1.val.val16; break; default: return VERR_EM_INTERPRETER; } if (sel == 0) { if (CPUMGetHyperLDTR(pVM) == 0) { // this simple case is most frequent in Windows 2000 (31k - boot & shutdown) return VINF_SUCCESS; } } //still feeling lazy return VERR_EM_INTERPRETER; } #ifdef IN_GC /** * STI Emulation. * * @remark the instruction following sti is guaranteed to be executed before any interrupts are dispatched */ static int emInterpretSti(PVM pVM, PDISCPUSTATE pCpu, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, uint32_t *pcbSize) { PPATMGCSTATE pGCState = PATMQueryGCState(pVM); if(!pGCState) { Assert(pGCState); return VERR_EM_INTERPRETER; } pGCState->uVMFlags |= X86_EFL_IF; Assert(pRegFrame->eflags.u32 & X86_EFL_IF); Assert(pvFault == SELMToFlat(pVM, pRegFrame->eflags, pRegFrame->cs, &pRegFrame->csHid, (RTGCPTR)pRegFrame->eip)); pVM->em.s.GCPtrInhibitInterrupts = pRegFrame->eip + pCpu->opsize; VM_FF_SET(pVM, VM_FF_INHIBIT_INTERRUPTS); return VINF_SUCCESS; } #endif /* IN_GC */ /** * HLT Emulation. */ static int emInterpretHlt(PVM pVM, PDISCPUSTATE pCpu, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, uint32_t *pcbSize) { return VINF_EM_HALT; } /** * RDTSC Emulation. */ /** * Interpret RDTSC * * @returns VBox status code. * @param pVM The VM handle. * @param pRegFrame The register frame. * */ EMDECL(int) EMInterpretRdtsc(PVM pVM, PCPUMCTXCORE pRegFrame) { unsigned uCR4 = CPUMGetGuestCR4(pVM); if (uCR4 & X86_CR4_TSD) return VERR_EM_INTERPRETER; /* genuine #GP */ uint64_t uTicks = TMCpuTickGet(pVM); pRegFrame->eax = uTicks; pRegFrame->edx = (uTicks >> 32ULL); return VINF_SUCCESS; } static int emInterpretRdtsc(PVM pVM, PDISCPUSTATE pCpu, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, uint32_t *pcbSize) { return EMInterpretRdtsc(pVM, pRegFrame); } /** * MONITOR Emulation. */ static int emInterpretMonitor(PVM pVM, PDISCPUSTATE pCpu, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, uint32_t *pcbSize) { uint32_t u32Dummy, u32ExtFeatures, cpl; if (pRegFrame->ecx != 0) return VERR_EM_INTERPRETER; /* illegal value. */ /* Get the current privilege level. */ cpl = CPUMGetGuestCPL(pVM, pRegFrame); if (cpl != 0) return VERR_EM_INTERPRETER; /* supervisor only */ CPUMGetGuestCpuId(pVM, 1, &u32Dummy, &u32Dummy, &u32ExtFeatures, &u32Dummy); if (!(u32ExtFeatures & X86_CPUID_FEATURE_ECX_MONITOR)) return VERR_EM_INTERPRETER; /* not supported */ return VINF_SUCCESS; } /** * MWAIT Emulation. */ static int emInterpretMWait(PVM pVM, PDISCPUSTATE pCpu, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, uint32_t *pcbSize) { uint32_t u32Dummy, u32ExtFeatures, cpl; if (pRegFrame->ecx != 0) return VERR_EM_INTERPRETER; /* illegal value. */ /* Get the current privilege level. */ cpl = CPUMGetGuestCPL(pVM, pRegFrame); if (cpl != 0) return VERR_EM_INTERPRETER; /* supervisor only */ CPUMGetGuestCpuId(pVM, 1, &u32Dummy, &u32Dummy, &u32ExtFeatures, &u32Dummy); if (!(u32ExtFeatures & X86_CPUID_FEATURE_ECX_MONITOR)) return VERR_EM_INTERPRETER; /* not supported */ /** @todo not completely correct */ return VINF_EM_HALT; } /** * Internal worker. * @copydoc EMInterpretInstructionCPU */ DECLINLINE(int) emInterpretInstructionCPU(PVM pVM, PDISCPUSTATE pCpu, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, uint32_t *pcbSize) { Assert(pcbSize); *pcbSize = 0; /* * Only supervisor guest code!! * And no complicated prefixes. */ /* Get the current privilege level. */ uint32_t cpl = CPUMGetGuestCPL(pVM, pRegFrame); if ( cpl != 0 && pCpu->pCurInstr->opcode != OP_RDTSC) /* rdtsc requires emulation in ring 3 as well */ { Log(("WARNING: refusing instruction emulation for user-mode code!!\n")); STAM_COUNTER_INC(&pVM->em.s.CTXSUFF(pStats)->CTXMID(Stat,FailedUserMode)); return VERR_EM_INTERPRETER; } #ifdef IN_GC if ( (pCpu->prefix & (PREFIX_REPNE | PREFIX_REP)) || ( (pCpu->prefix & PREFIX_LOCK) && pCpu->pCurInstr->opcode != OP_CMPXCHG && pCpu->pCurInstr->opcode != OP_CMPXCHG8B && pCpu->pCurInstr->opcode != OP_XADD && pCpu->pCurInstr->opcode != OP_OR && pCpu->pCurInstr->opcode != OP_BTR ) ) #else if (pCpu->prefix & (PREFIX_REPNE | PREFIX_REP | PREFIX_LOCK)) #endif { //Log(("EMInterpretInstruction: wrong prefix!!\n")); STAM_COUNTER_INC(&pVM->em.s.CTXSUFF(pStats)->CTXMID(Stat,FailedPrefix)); return VERR_EM_INTERPRETER; } int rc; switch (pCpu->pCurInstr->opcode) { #ifdef IN_GC # define INTERPRET_CASE_EX_LOCK_PARAM3(opcode, Instr, InstrFn, pfnEmulate, pfnEmulateLock) \ case opcode:\ if (pCpu->prefix & PREFIX_LOCK) \ rc = emInterpretLock##InstrFn(pVM, pCpu, pRegFrame, pvFault, pcbSize, pfnEmulateLock); \ else \ rc = emInterpret##InstrFn(pVM, pCpu, pRegFrame, pvFault, pcbSize, pfnEmulate); \ if (VBOX_SUCCESS(rc)) \ STAM_COUNTER_INC(&pVM->em.s.CTXSUFF(pStats)->CTXMID(Stat,Instr)); \ else \ STAM_COUNTER_INC(&pVM->em.s.CTXSUFF(pStats)->CTXMID(Stat,Failed##Instr)); \ return rc #else # define INTERPRET_CASE_EX_LOCK_PARAM3(opcode, Instr, InstrFn, pfnEmulate, pfnEmulateLock) \ INTERPRET_CASE_EX_PARAM3(opcode, Instr, InstrFn, pfnEmulate) #endif #define INTERPRET_CASE_EX_PARAM3(opcode, Instr, InstrFn, pfnEmulate) \ case opcode:\ rc = emInterpret##InstrFn(pVM, pCpu, pRegFrame, pvFault, pcbSize, pfnEmulate); \ if (VBOX_SUCCESS(rc)) \ STAM_COUNTER_INC(&pVM->em.s.CTXSUFF(pStats)->CTXMID(Stat,Instr)); \ else \ STAM_COUNTER_INC(&pVM->em.s.CTXSUFF(pStats)->CTXMID(Stat,Failed##Instr)); \ return rc #define INTERPRET_CASE_EX_PARAM2(opcode, Instr, InstrFn, pfnEmulate) \ INTERPRET_CASE_EX_PARAM3(opcode, Instr, InstrFn, pfnEmulate) #define INTERPRET_CASE_EX_LOCK_PARAM2(opcode, Instr, InstrFn, pfnEmulate, pfnEmulateLock) \ INTERPRET_CASE_EX_LOCK_PARAM3(opcode, Instr, InstrFn, pfnEmulate, pfnEmulateLock) #define INTERPRET_CASE(opcode, Instr) \ case opcode:\ rc = emInterpret##Instr(pVM, pCpu, pRegFrame, pvFault, pcbSize); \ if (VBOX_SUCCESS(rc)) \ STAM_COUNTER_INC(&pVM->em.s.CTXSUFF(pStats)->CTXMID(Stat,Instr)); \ else \ STAM_COUNTER_INC(&pVM->em.s.CTXSUFF(pStats)->CTXMID(Stat,Failed##Instr)); \ return rc #define INTERPRET_STAT_CASE(opcode, Instr) \ case opcode: STAM_COUNTER_INC(&pVM->em.s.CTXSUFF(pStats)->CTXMID(Stat,Failed##Instr)); return VERR_EM_INTERPRETER; INTERPRET_CASE(OP_XCHG,Xchg); INTERPRET_CASE_EX_PARAM2(OP_DEC,Dec, IncDec, EMEmulateDec); INTERPRET_CASE_EX_PARAM2(OP_INC,Inc, IncDec, EMEmulateInc); INTERPRET_CASE(OP_POP,Pop); INTERPRET_CASE_EX_LOCK_PARAM3(OP_OR, Or, OrXorAnd, EMEmulateOr, EMEmulateLockOr); INTERPRET_CASE_EX_PARAM3(OP_XOR,Xor, OrXorAnd, EMEmulateXor); INTERPRET_CASE_EX_PARAM3(OP_AND,And, OrXorAnd, EMEmulateAnd); INTERPRET_CASE(OP_MOV,Mov); INTERPRET_CASE(OP_INVLPG,InvlPg); INTERPRET_CASE(OP_CPUID,CpuId); INTERPRET_CASE(OP_MOV_CR,MovCRx); INTERPRET_CASE(OP_MOV_DR,MovDRx); INTERPRET_CASE(OP_LLDT,LLdt); INTERPRET_CASE(OP_CLTS,Clts); INTERPRET_CASE(OP_MONITOR, Monitor); INTERPRET_CASE(OP_MWAIT, MWait); INTERPRET_CASE_EX_PARAM3(OP_ADD,Add, AddSub, EMEmulateAdd); INTERPRET_CASE_EX_PARAM3(OP_SUB,Sub, AddSub, EMEmulateSub); INTERPRET_CASE(OP_ADC,Adc); INTERPRET_CASE_EX_LOCK_PARAM2(OP_BTR,Btr, BitTest, EMEmulateBtr, EMEmulateLockBtr); INTERPRET_CASE_EX_PARAM2(OP_BTS,Bts, BitTest, EMEmulateBts); INTERPRET_CASE_EX_PARAM2(OP_BTC,Btc, BitTest, EMEmulateBtc); INTERPRET_CASE(OP_RDTSC,Rdtsc); #ifdef IN_GC INTERPRET_CASE(OP_STI,Sti); INTERPRET_CASE(OP_CMPXCHG, CmpXchg); INTERPRET_CASE(OP_CMPXCHG8B, CmpXchg8b); INTERPRET_CASE(OP_XADD, XAdd); #endif INTERPRET_CASE(OP_HLT,Hlt); INTERPRET_CASE(OP_IRET,Iret); #ifdef VBOX_WITH_STATISTICS #ifndef IN_GC INTERPRET_STAT_CASE(OP_CMPXCHG,CmpXchg); INTERPRET_STAT_CASE(OP_CMPXCHG8B, CmpXchg8b); INTERPRET_STAT_CASE(OP_XADD, XAdd); #endif INTERPRET_STAT_CASE(OP_MOVNTPS,MovNTPS); INTERPRET_STAT_CASE(OP_STOSWD,StosWD); INTERPRET_STAT_CASE(OP_WBINVD,WbInvd); #endif default: Log3(("emInterpretInstructionCPU: opcode=%d\n", pCpu->pCurInstr->opcode)); STAM_COUNTER_INC(&pVM->em.s.CTXSUFF(pStats)->CTXMID(Stat,FailedMisc)); return VERR_EM_INTERPRETER; #undef INTERPRET_CASE_EX_PARAM2 #undef INTERPRET_STAT_CASE #undef INTERPRET_CASE_EX #undef INTERPRET_CASE } AssertFailed(); return VERR_INTERNAL_ERROR; } /** * Sets the PC for which interrupts should be inhibited. * * @param pVM The VM handle. * @param PC The PC. */ EMDECL(void) EMSetInhibitInterruptsPC(PVM pVM, RTGCUINTPTR PC) { pVM->em.s.GCPtrInhibitInterrupts = PC; VM_FF_SET(pVM, VM_FF_INHIBIT_INTERRUPTS); } /** * Gets the PC for which interrupts should be inhibited. * * There are a few instructions which inhibits or delays interrupts * for the instruction following them. These instructions are: * - STI * - MOV SS, r/m16 * - POP SS * * @returns The PC for which interrupts should be inhibited. * @param pVM VM handle. * */ EMDECL(RTGCUINTPTR) EMGetInhibitInterruptsPC(PVM pVM) { return pVM->em.s.GCPtrInhibitInterrupts; }