/* $Id: IOMRC.cpp 62478 2016-07-22 18:29:06Z vboxsync $ */ /** @file * IOM - Input / Output Monitor - Raw-Mode Context. */ /* * 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_IOM #include #include #include #include #include #include #include #include #include #include "IOMInternal.h" #include #include #include #include #include #include #include #include #include /** * Converts disassembler mode to IEM mode. * @return IEM CPU mode. * @param enmDisMode Disassembler CPU mode. */ DECLINLINE(IEMMODE) iomDisModeToIemMode(DISCPUMODE enmDisMode) { switch (enmDisMode) { case DISCPUMODE_16BIT: return IEMMODE_16BIT; case DISCPUMODE_32BIT: return IEMMODE_32BIT; case DISCPUMODE_64BIT: return IEMMODE_64BIT; default: AssertFailed(); return IEMMODE_32BIT; } } /** * IN , * * @returns Strict VBox status code. Informational status codes other than the one documented * here are to be treated as internal failure. Use IOM_SUCCESS() to check for success. * @retval VINF_SUCCESS Success. * @retval VINF_EM_FIRST-VINF_EM_LAST Success with some exceptions (see IOM_SUCCESS()), the * status code must be passed on to EM. * @retval VINF_IOM_R3_IOPORT_READ Defer the read to ring-3. (R0/GC only) * @retval VINF_EM_RAW_GUEST_TRAP The exception was left pending. (TRPMRaiseXcptErr) * @retval VINF_TRPM_XCPT_DISPATCHED The exception was raised and dispatched for raw-mode execution. (TRPMRaiseXcptErr) * @retval VINF_EM_RESCHEDULE_REM The exception was dispatched and cannot be executed in raw-mode. (TRPMRaiseXcptErr) * * @param pVM The cross context VM structure. * @param pVCpu The cross context virtual CPU structure of the calling EMT. * @param pRegFrame Pointer to CPUMCTXCORE guest registers structure. * @param pCpu Disassembler CPU state. */ static VBOXSTRICTRC iomRCInterpretIN(PVM pVM, PVMCPU pVCpu, PCPUMCTXCORE pRegFrame, PDISCPUSTATE pCpu) { STAM_COUNTER_INC(&pVM->iom.s.StatInstIn); Assert(pCpu->Param2.fUse & (DISUSE_IMMEDIATE8 | DISUSE_REG_GEN16)); uint16_t u16Port = pCpu->Param2.fUse & DISUSE_REG_GEN16 ? pRegFrame->dx : (uint16_t)pCpu->Param2.uValue; Assert(pCpu->Param1.fUse & (DISUSE_REG_GEN32 | DISUSE_REG_GEN16 | DISUSE_REG_GEN8)); uint8_t cbValue = pCpu->Param1.fUse & DISUSE_REG_GEN32 ? 4 : pCpu->Param1.fUse & DISUSE_REG_GEN16 ? 2 : 1; return IEMExecDecodedIn(pVCpu, pCpu->cbInstr, u16Port, cbValue); } /** * OUT , * * @returns Strict VBox status code. Informational status codes other than the one documented * here are to be treated as internal failure. Use IOM_SUCCESS() to check for success. * @retval VINF_SUCCESS Success. * @retval VINF_EM_FIRST-VINF_EM_LAST Success with some exceptions (see IOM_SUCCESS()), the * status code must be passed on to EM. * @retval VINF_IOM_R3_IOPORT_WRITE Defer the write to ring-3. (R0/GC only) * @retval VINF_IOM_R3_IOPORT_COMMIT_WRITE Defer the write to ring-3. (R0/GC only) * @retval VINF_EM_RAW_GUEST_TRAP The exception was left pending. (TRPMRaiseXcptErr) * @retval VINF_TRPM_XCPT_DISPATCHED The exception was raised and dispatched for raw-mode execution. (TRPMRaiseXcptErr) * @retval VINF_EM_RESCHEDULE_REM The exception was dispatched and cannot be executed in raw-mode. (TRPMRaiseXcptErr) * * @param pVM The cross context VM structure. * @param pVCpu The cross context virtual CPU structure of the calling EMT. * @param pRegFrame Pointer to CPUMCTXCORE guest registers structure. * @param pCpu Disassembler CPU state. */ static VBOXSTRICTRC iomRCInterpretOUT(PVM pVM, PVMCPU pVCpu, PCPUMCTXCORE pRegFrame, PDISCPUSTATE pCpu) { STAM_COUNTER_INC(&pVM->iom.s.StatInstOut); Assert(pCpu->Param1.fUse & (DISUSE_IMMEDIATE8 | DISUSE_REG_GEN16)); uint16_t const u16Port = pCpu->Param1.fUse & DISUSE_REG_GEN16 ? pRegFrame->dx : (uint16_t)pCpu->Param1.uValue; Assert(pCpu->Param2.fUse & (DISUSE_REG_GEN32 | DISUSE_REG_GEN16 | DISUSE_REG_GEN8)); uint8_t const cbValue = pCpu->Param2.fUse & DISUSE_REG_GEN32 ? 4 : pCpu->Param2.fUse & DISUSE_REG_GEN16 ? 2 : 1; return IEMExecDecodedOut(pVCpu, pCpu->cbInstr, u16Port, cbValue); } /** * [REP*] INSB/INSW/INSD * ES:EDI,DX[,ECX] * * @returns Strict VBox status code. Informational status codes other than the one documented * here are to be treated as internal failure. Use IOM_SUCCESS() to check for success. * @retval VINF_SUCCESS Success. * @retval VINF_EM_FIRST-VINF_EM_LAST Success with some exceptions (see IOM_SUCCESS()), the * status code must be passed on to EM. * @retval VINF_IOM_R3_IOPORT_READ Defer the read to ring-3. (R0/GC only) * @retval VINF_EM_RAW_EMULATE_INSTR Defer the read to the REM. * @retval VINF_EM_RAW_GUEST_TRAP The exception was left pending. (TRPMRaiseXcptErr) * @retval VINF_TRPM_XCPT_DISPATCHED The exception was raised and dispatched for raw-mode execution. (TRPMRaiseXcptErr) * @retval VINF_EM_RESCHEDULE_REM The exception was dispatched and cannot be executed in raw-mode. (TRPMRaiseXcptErr) * * @param pVM The cross context VM structure. * @param pVCpu The cross context virtual CPU structure of the calling EMT. * @param pRegFrame Pointer to CPUMCTXCORE guest registers structure. * @param pCpu Disassembler CPU state. */ static VBOXSTRICTRC iomRCInterpretINS(PVM pVM, PVMCPU pVCpu, PCPUMCTXCORE pRegFrame, PDISCPUSTATE pCpu) { uint8_t cbValue = pCpu->pCurInstr->uOpcode == OP_INSB ? 1 : pCpu->uOpMode == DISCPUMODE_16BIT ? 2 : 4; /* dword in both 32 & 64 bits mode */ return IEMExecStringIoRead(pVCpu, cbValue, iomDisModeToIemMode((DISCPUMODE)pCpu->uCpuMode), RT_BOOL(pCpu->fPrefix & (DISPREFIX_REPNE | DISPREFIX_REP)), pCpu->cbInstr, false /*fIoChecked*/); } /** * [REP*] OUTSB/OUTSW/OUTSD * DS:ESI,DX[,ECX] * * @returns Strict VBox status code. Informational status codes other than the one documented * here are to be treated as internal failure. Use IOM_SUCCESS() to check for success. * @retval VINF_SUCCESS Success. * @retval VINF_EM_FIRST-VINF_EM_LAST Success with some exceptions (see IOM_SUCCESS()), the * status code must be passed on to EM. * @retval VINF_IOM_R3_IOPORT_WRITE Defer the write to ring-3. (R0/GC only) * @retval VINF_IOM_R3_IOPORT_COMMIT_WRITE Defer the write to ring-3. (R0/GC only) * @retval VINF_EM_RAW_EMULATE_INSTR Defer the write to the REM. * @retval VINF_EM_RAW_GUEST_TRAP The exception was left pending. (TRPMRaiseXcptErr) * @retval VINF_TRPM_XCPT_DISPATCHED The exception was raised and dispatched for raw-mode execution. (TRPMRaiseXcptErr) * @retval VINF_EM_RESCHEDULE_REM The exception was dispatched and cannot be executed in raw-mode. (TRPMRaiseXcptErr) * * @param pVM The cross context VM structure. * @param pVCpu The cross context virtual CPU structure of the calling EMT. * @param pRegFrame Pointer to CPUMCTXCORE guest registers structure. * @param pCpu Disassembler CPU state. */ static VBOXSTRICTRC iomRCInterpretOUTS(PVM pVM, PVMCPU pVCpu, PCPUMCTXCORE pRegFrame, PDISCPUSTATE pCpu) { uint8_t cbValue = pCpu->pCurInstr->uOpcode == OP_OUTSB ? 1 : pCpu->uOpMode == DISCPUMODE_16BIT ? 2 : 4; /* dword in both 32 & 64 bits mode */ return IEMExecStringIoWrite(pVCpu, cbValue, iomDisModeToIemMode((DISCPUMODE)pCpu->uCpuMode), RT_BOOL(pCpu->fPrefix & (DISPREFIX_REPNE | DISPREFIX_REP)), pCpu->cbInstr, pCpu->fPrefix & DISPREFIX_SEG ? pCpu->idxSegPrefix : X86_SREG_DS, false /*fIoChecked*/); } /** * Attempts to service an IN/OUT instruction. * * The \#GP trap handler in RC will call this function if the opcode causing * the trap is a in or out type instruction. (Call it indirectly via EM that * is.) * * @returns Strict VBox status code. Informational status codes other than the one documented * here are to be treated as internal failure. Use IOM_SUCCESS() to check for success. * @retval VINF_SUCCESS Success. * @retval VINF_EM_FIRST-VINF_EM_LAST Success with some exceptions (see IOM_SUCCESS()), the * status code must be passed on to EM. * @retval VINF_EM_RESCHEDULE_REM The exception was dispatched and cannot be executed in raw-mode. (TRPMRaiseXcptErr) * @retval VINF_EM_RAW_EMULATE_INSTR Defer the read to the REM. * @retval VINF_IOM_R3_IOPORT_READ Defer the read to ring-3. * @retval VINF_EM_RAW_GUEST_TRAP The exception was left pending. (TRPMRaiseXcptErr) * @retval VINF_TRPM_XCPT_DISPATCHED The exception was raised and dispatched for raw-mode execution. (TRPMRaiseXcptErr) * * @param pVM The cross context VM structure. * @param pVCpu The cross context virtual CPU structure of the calling EMT. * @param pRegFrame Pointer to CPUMCTXCORE guest registers structure. * @param pCpu Disassembler CPU state. */ VMMRCDECL(VBOXSTRICTRC) IOMRCIOPortHandler(PVM pVM, PVMCPU pVCpu, PCPUMCTXCORE pRegFrame, PDISCPUSTATE pCpu) { switch (pCpu->pCurInstr->uOpcode) { case OP_IN: return iomRCInterpretIN(pVM, pVCpu, pRegFrame, pCpu); case OP_OUT: return iomRCInterpretOUT(pVM, pVCpu, pRegFrame, pCpu); case OP_INSB: case OP_INSWD: return iomRCInterpretINS(pVM, pVCpu, pRegFrame, pCpu); case OP_OUTSB: case OP_OUTSWD: return iomRCInterpretOUTS(pVM, pVCpu, pRegFrame, pCpu); /* * The opcode wasn't know to us, freak out. */ default: AssertMsgFailed(("Unknown I/O port access opcode %d.\n", pCpu->pCurInstr->uOpcode)); return VERR_IOM_IOPORT_UNKNOWN_OPCODE; } }