| 1 | /* $Id: IOMGC.cpp 28800 2010-04-27 08:22:32Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IOM - Input / Output Monitor - Guest Context.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2007 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | */
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| 17 |
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| 18 |
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| 19 | /*******************************************************************************
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| 20 | * Header Files *
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| 21 | *******************************************************************************/
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| 22 | #define LOG_GROUP LOG_GROUP_IOM
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| 23 | #include <VBox/iom.h>
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| 24 | #include <VBox/cpum.h>
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| 25 | #include <VBox/pgm.h>
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| 26 | #include <VBox/selm.h>
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| 27 | #include <VBox/mm.h>
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| 28 | #include <VBox/em.h>
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| 29 | #include <VBox/pgm.h>
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| 30 | #include <VBox/trpm.h>
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| 31 | #include "IOMInternal.h"
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| 32 | #include <VBox/vm.h>
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| 33 |
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| 34 | #include <VBox/dis.h>
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| 35 | #include <VBox/disopcode.h>
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| 36 | #include <VBox/param.h>
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| 37 | #include <VBox/err.h>
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| 38 | #include <iprt/assert.h>
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| 39 | #include <VBox/log.h>
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| 40 | #include <iprt/asm.h>
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| 41 | #include <iprt/string.h>
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| 42 |
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| 43 |
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| 44 |
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| 45 | /**
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| 46 | * Attempts to service an IN/OUT instruction.
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| 47 | *
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| 48 | * The \#GP trap handler in GC will call this function if the opcode causing the
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| 49 | * trap is a in or out type instruction. (Call it indirectly via EM that is.)
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| 50 | *
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| 51 | * @returns Strict VBox status code. Informational status codes other than the one documented
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| 52 | * here are to be treated as internal failure. Use IOM_SUCCESS() to check for success.
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| 53 | * @retval VINF_SUCCESS Success.
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| 54 | * @retval VINF_EM_FIRST-VINF_EM_LAST Success with some exceptions (see IOM_SUCCESS()), the
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| 55 | * status code must be passed on to EM.
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| 56 | * @retval VINF_EM_RESCHEDULE_REM The exception was dispatched and cannot be executed in raw-mode. (TRPMRaiseXcptErr)
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| 57 | * @retval VINF_EM_RAW_EMULATE_INSTR Defer the read to the REM.
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| 58 | * @retval VINF_IOM_HC_IOPORT_READ Defer the read to ring-3. (R0/GC only)
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| 59 | * @retval VINF_EM_RAW_GUEST_TRAP The exception was left pending. (TRPMRaiseXcptErr)
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| 60 | * @retval VINF_TRPM_XCPT_DISPATCHED The exception was raised and dispatched for raw-mode execution. (TRPMRaiseXcptErr)
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| 61 | *
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| 62 | * @param pVM The virtual machine (GC pointer ofcourse).
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| 63 | * @param pRegFrame Pointer to CPUMCTXCORE guest registers structure.
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| 64 | * @param pCpu Disassembler CPU state.
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| 65 | */
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| 66 | VMMRCDECL(VBOXSTRICTRC) IOMGCIOPortHandler(PVM pVM, PCPUMCTXCORE pRegFrame, PDISCPUSTATE pCpu)
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| 67 | {
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| 68 | switch (pCpu->pCurInstr->opcode)
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| 69 | {
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| 70 | case OP_IN:
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| 71 | return IOMInterpretIN(pVM, pRegFrame, pCpu);
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| 72 |
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| 73 | case OP_OUT:
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| 74 | return IOMInterpretOUT(pVM, pRegFrame, pCpu);
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| 75 |
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| 76 | case OP_INSB:
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| 77 | case OP_INSWD:
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| 78 | return IOMInterpretINS(pVM, pRegFrame, pCpu);
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| 79 |
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| 80 | case OP_OUTSB:
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| 81 | case OP_OUTSWD:
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| 82 | return IOMInterpretOUTS(pVM, pRegFrame, pCpu);
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| 83 |
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| 84 | /*
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| 85 | * The opcode wasn't know to us, freak out.
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| 86 | */
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| 87 | default:
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| 88 | AssertMsgFailed(("Unknown I/O port access opcode %d.\n", pCpu->pCurInstr->opcode));
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| 89 | return VERR_INTERNAL_ERROR;
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| 90 | }
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| 91 | }
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| 92 |
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