1 | /* $Id: IOMGC.cpp 22493 2009-08-26 22:22:16Z 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 Sun Microsystems, Inc.
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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 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
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18 | * Clara, CA 95054 USA or visit http://www.sun.com if you need
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19 | * additional information or have any questions.
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20 | */
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21 |
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22 |
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23 | /*******************************************************************************
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24 | * Header Files *
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25 | *******************************************************************************/
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26 | #define LOG_GROUP LOG_GROUP_IOM
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27 | #include <VBox/iom.h>
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28 | #include <VBox/cpum.h>
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29 | #include <VBox/pgm.h>
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30 | #include <VBox/selm.h>
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31 | #include <VBox/mm.h>
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32 | #include <VBox/em.h>
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33 | #include <VBox/pgm.h>
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34 | #include <VBox/trpm.h>
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35 | #include "IOMInternal.h"
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36 | #include <VBox/vm.h>
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37 |
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38 | #include <VBox/dis.h>
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39 | #include <VBox/disopcode.h>
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40 | #include <VBox/param.h>
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41 | #include <VBox/err.h>
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42 | #include <iprt/assert.h>
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43 | #include <VBox/log.h>
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44 | #include <iprt/asm.h>
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45 | #include <iprt/string.h>
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46 |
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47 |
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48 |
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49 | /**
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50 | * Attempts to service an IN/OUT instruction.
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51 | *
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52 | * The \#GP trap handler in GC will call this function if the opcode causing the
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53 | * trap is a in or out type instruction. (Call it indirectly via EM that is.)
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54 | *
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55 | * @returns Strict VBox status code. Informational status codes other than the one documented
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56 | * here are to be treated as internal failure. Use IOM_SUCCESS() to check for success.
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57 | * @retval VINF_SUCCESS Success.
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58 | * @retval VINF_EM_FIRST-VINF_EM_LAST Success with some exceptions (see IOM_SUCCESS()), the
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59 | * status code must be passed on to EM.
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60 | * @retval VINF_EM_RESCHEDULE_REM The exception was dispatched and cannot be executed in raw-mode. (TRPMRaiseXcptErr)
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61 | * @retval VINF_EM_RAW_EMULATE_INSTR Defer the read to the REM.
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62 | * @retval VINF_IOM_HC_IOPORT_READ Defer the read to ring-3. (R0/GC only)
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63 | * @retval VINF_EM_RAW_GUEST_TRAP The exception was left pending. (TRPMRaiseXcptErr)
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64 | * @retval VINF_TRPM_XCPT_DISPATCHED The exception was raised and dispatched for raw-mode execution. (TRPMRaiseXcptErr)
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65 | *
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66 | * @param pVM The virtual machine (GC pointer ofcourse).
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67 | * @param pRegFrame Pointer to CPUMCTXCORE guest registers structure.
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68 | * @param pCpu Disassembler CPU state.
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69 | */
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70 | VMMRCDECL(VBOXSTRICTRC) IOMGCIOPortHandler(PVM pVM, PCPUMCTXCORE pRegFrame, PDISCPUSTATE pCpu)
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71 | {
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72 | switch (pCpu->pCurInstr->opcode)
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73 | {
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74 | case OP_IN:
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75 | return IOMInterpretIN(pVM, pRegFrame, pCpu);
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76 |
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77 | case OP_OUT:
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78 | return IOMInterpretOUT(pVM, pRegFrame, pCpu);
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79 |
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80 | case OP_INSB:
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81 | case OP_INSWD:
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82 | return IOMInterpretINS(pVM, pRegFrame, pCpu);
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83 |
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84 | case OP_OUTSB:
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85 | case OP_OUTSWD:
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86 | return IOMInterpretOUTS(pVM, pRegFrame, pCpu);
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87 |
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88 | /*
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89 | * The opcode wasn't know to us, freak out.
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90 | */
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91 | default:
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92 | AssertMsgFailed(("Unknown I/O port access opcode %d.\n", pCpu->pCurInstr->opcode));
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93 | return VERR_INTERNAL_ERROR;
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94 | }
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95 | }
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96 |
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