VirtualBox

source: vbox/trunk/src/VBox/VMM/VMMGC/IOMGC.cpp@ 26600

Last change on this file since 26600 was 22493, checked in by vboxsync, 15 years ago

VMM,DevPCI,VBox/types.h: Added a VBOXSTRICTRC type for indicating strict VBox stuatus codes. Some expirmentation with making it a class in strict builds to get some help from the compiler with making sure the return code is treated correctly.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 3.5 KB
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1/* $Id: IOMGC.cpp 22493 2009-08-26 22:22:16Z vboxsync $ */
2/** @file
3 * IOM - Input / Output Monitor - Guest Context.
4 */
5
6/*
7 * Copyright (C) 2006-2007 Sun Microsystems, Inc.
8 *
9 * This file is part of VirtualBox Open Source Edition (OSE), as
10 * available from http://www.virtualbox.org. This file is free software;
11 * you can redistribute it and/or modify it under the terms of the GNU
12 * General Public License (GPL) as published by the Free Software
13 * Foundation, in version 2 as it comes in the "COPYING" file of the
14 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16 *
17 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
18 * Clara, CA 95054 USA or visit http://www.sun.com if you need
19 * additional information or have any questions.
20 */
21
22
23/*******************************************************************************
24* Header Files *
25*******************************************************************************/
26#define LOG_GROUP LOG_GROUP_IOM
27#include <VBox/iom.h>
28#include <VBox/cpum.h>
29#include <VBox/pgm.h>
30#include <VBox/selm.h>
31#include <VBox/mm.h>
32#include <VBox/em.h>
33#include <VBox/pgm.h>
34#include <VBox/trpm.h>
35#include "IOMInternal.h"
36#include <VBox/vm.h>
37
38#include <VBox/dis.h>
39#include <VBox/disopcode.h>
40#include <VBox/param.h>
41#include <VBox/err.h>
42#include <iprt/assert.h>
43#include <VBox/log.h>
44#include <iprt/asm.h>
45#include <iprt/string.h>
46
47
48
49/**
50 * Attempts to service an IN/OUT instruction.
51 *
52 * The \#GP trap handler in GC will call this function if the opcode causing the
53 * trap is a in or out type instruction. (Call it indirectly via EM that is.)
54 *
55 * @returns Strict VBox status code. Informational status codes other than the one documented
56 * here are to be treated as internal failure. Use IOM_SUCCESS() to check for success.
57 * @retval VINF_SUCCESS Success.
58 * @retval VINF_EM_FIRST-VINF_EM_LAST Success with some exceptions (see IOM_SUCCESS()), the
59 * status code must be passed on to EM.
60 * @retval VINF_EM_RESCHEDULE_REM The exception was dispatched and cannot be executed in raw-mode. (TRPMRaiseXcptErr)
61 * @retval VINF_EM_RAW_EMULATE_INSTR Defer the read to the REM.
62 * @retval VINF_IOM_HC_IOPORT_READ Defer the read to ring-3. (R0/GC only)
63 * @retval VINF_EM_RAW_GUEST_TRAP The exception was left pending. (TRPMRaiseXcptErr)
64 * @retval VINF_TRPM_XCPT_DISPATCHED The exception was raised and dispatched for raw-mode execution. (TRPMRaiseXcptErr)
65 *
66 * @param pVM The virtual machine (GC pointer ofcourse).
67 * @param pRegFrame Pointer to CPUMCTXCORE guest registers structure.
68 * @param pCpu Disassembler CPU state.
69 */
70VMMRCDECL(VBOXSTRICTRC) IOMGCIOPortHandler(PVM pVM, PCPUMCTXCORE pRegFrame, PDISCPUSTATE pCpu)
71{
72 switch (pCpu->pCurInstr->opcode)
73 {
74 case OP_IN:
75 return IOMInterpretIN(pVM, pRegFrame, pCpu);
76
77 case OP_OUT:
78 return IOMInterpretOUT(pVM, pRegFrame, pCpu);
79
80 case OP_INSB:
81 case OP_INSWD:
82 return IOMInterpretINS(pVM, pRegFrame, pCpu);
83
84 case OP_OUTSB:
85 case OP_OUTSWD:
86 return IOMInterpretOUTS(pVM, pRegFrame, pCpu);
87
88 /*
89 * The opcode wasn't know to us, freak out.
90 */
91 default:
92 AssertMsgFailed(("Unknown I/O port access opcode %d.\n", pCpu->pCurInstr->opcode));
93 return VERR_INTERNAL_ERROR;
94 }
95}
96
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