| 1 | /* $Id: DBGFAddr.cpp 4198 2007-08-17 00:45:19Z vboxsync $ */
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| 2 | /** @file
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| 3 | * VMM DBGF - Debugger Facility, Mixed Address Methods.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2007 innotek GmbH
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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 as published by the Free Software Foundation,
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| 13 | * in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
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| 14 | * distribution. VirtualBox OSE is distributed in the hope that it will
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| 15 | * 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_DBGF
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| 23 | #include <VBox/dbgf.h>
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| 24 | #include <VBox/selm.h>
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| 25 | #include "DBGFInternal.h"
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| 26 | #include <VBox/vm.h>
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| 27 | #include <VBox/mm.h>
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| 28 | #include <VBox/err.h>
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| 29 | #include <VBox/log.h>
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| 30 |
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| 31 |
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| 32 |
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| 33 | /**
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| 34 | * Checks if an address is in the HMA or not.
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| 35 | * @returns true if it's inside the HMA.
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| 36 | * @returns flase if it's not inside the HMA.
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| 37 | * @param pVM The VM handle.
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| 38 | * @param FlatPtr The address in question.
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| 39 | */
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| 40 | DECLINLINE(bool) dbgfR3IsHMA(PVM pVM, RTGCUINTPTR FlatPtr)
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| 41 | {
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| 42 | return MMHyperIsInsideArea(pVM, FlatPtr);
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| 43 | }
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| 44 |
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| 45 |
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| 46 | /**
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| 47 | * Creates a mixed address from a Sel:off pair.
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| 48 | *
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| 49 | * @returns VBox status code.
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| 50 | * @param pVM The VM handle.
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| 51 | * @param pAddress Where to store the mixed address.
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| 52 | * @param Sel The selector part.
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| 53 | * @param off The offset part.
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| 54 | */
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| 55 | DBGFR3DECL(int) DBGFR3AddrFromSelOff(PVM pVM, PDBGFADDRESS pAddress, RTSEL Sel, RTUINTPTR off)
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| 56 | {
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| 57 | pAddress->Sel = Sel;
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| 58 | pAddress->off = off;
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| 59 | if (Sel != DBGF_SEL_FLAT)
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| 60 | {
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| 61 | SELMSELINFO SelInfo;
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| 62 | int rc = SELMR3GetSelectorInfo(pVM, Sel, &SelInfo);
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| 63 | if (VBOX_FAILURE(rc))
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| 64 | return rc;
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| 65 |
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| 66 | /* check limit. */
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| 67 | if ( (SelInfo.Raw.Gen.u4Type & X86_SEL_TYPE_DOWN)
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| 68 | && SelInfo.Raw.Gen.u1DescType
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| 69 | && ( SelInfo.Raw.Gen.u4Type == X86_SEL_TYPE_RO_DOWN
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| 70 | || SelInfo.Raw.Gen.u4Type == X86_SEL_TYPE_RO_DOWN_ACC
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| 71 | || SelInfo.Raw.Gen.u4Type == X86_SEL_TYPE_RW_DOWN
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| 72 | || SelInfo.Raw.Gen.u4Type == X86_SEL_TYPE_RW_DOWN_ACC))
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| 73 | {
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| 74 | if (!SelInfo.Raw.Gen.u1Granularity && off > UINT32_C(0xffff))
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| 75 | return VERR_OUT_OF_SELECTOR_BOUNDS;
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| 76 | if (off <= SelInfo.cbLimit)
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| 77 | return VERR_OUT_OF_SELECTOR_BOUNDS;
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| 78 | }
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| 79 | else if (off > SelInfo.cbLimit)
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| 80 | return VERR_OUT_OF_SELECTOR_BOUNDS;
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| 81 |
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| 82 | pAddress->FlatPtr = SelInfo.GCPtrBase + off;
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| 83 | /** @todo fix this flat selector test! */
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| 84 | if ( !SelInfo.GCPtrBase
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| 85 | && SelInfo.Raw.Gen.u1Granularity
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| 86 | && SelInfo.Raw.Gen.u1DefBig)
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| 87 | pAddress->fFlags = DBGFADDRESS_FLAGS_FLAT;
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| 88 | else if (SelInfo.cbLimit <= UINT32_C(0xffff))
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| 89 | pAddress->fFlags = DBGFADDRESS_FLAGS_FAR16;
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| 90 | else if (SelInfo.cbLimit <= UINT32_C(0xffffffff))
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| 91 | pAddress->fFlags = DBGFADDRESS_FLAGS_FAR32;
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| 92 | else
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| 93 | pAddress->fFlags = DBGFADDRESS_FLAGS_FAR64;
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| 94 | }
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| 95 | else
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| 96 | {
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| 97 | pAddress->FlatPtr = off;
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| 98 | pAddress->fFlags = DBGFADDRESS_FLAGS_FLAT;
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| 99 | }
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| 100 | pAddress->fFlags |= DBGFADDRESS_FLAGS_VALID;
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| 101 | if (dbgfR3IsHMA(pVM, pAddress->FlatPtr))
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| 102 | pAddress->fFlags |= DBGFADDRESS_FLAGS_HMA;
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| 103 |
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| 104 | return VINF_SUCCESS;
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| 105 | }
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| 106 |
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| 107 |
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| 108 | /**
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| 109 | * Creates a mixed address from a flat address.
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| 110 | *
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| 111 | * @param pVM The VM handle.
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| 112 | * @param pAddress Where to store the mixed address.
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| 113 | * @param FlatPtr The flat pointer.
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| 114 | */
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| 115 | DBGFR3DECL(void) DBGFR3AddrFromFlat(PVM pVM, PDBGFADDRESS pAddress, RTGCUINTPTR FlatPtr)
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| 116 | {
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| 117 | pAddress->Sel = DBGF_SEL_FLAT;
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| 118 | pAddress->off = FlatPtr;
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| 119 | pAddress->FlatPtr = FlatPtr;
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| 120 | pAddress->fFlags = DBGFADDRESS_FLAGS_FLAT | DBGFADDRESS_FLAGS_VALID;
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| 121 | if (dbgfR3IsHMA(pVM, pAddress->FlatPtr))
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| 122 | pAddress->fFlags |= DBGFADDRESS_FLAGS_HMA;
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| 123 | }
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| 124 |
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| 125 |
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| 126 | /**
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| 127 | * Checks if the specified address is valid (checks the structure pointer too).
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| 128 | *
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| 129 | * @returns true if valid.
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| 130 | * @returns false if invalid.
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| 131 | * @param pVM The VM handle.
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| 132 | * @param pAddress The address to validate.
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| 133 | */
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| 134 | DBGFR3DECL(bool) DBGFR3AddrIsValid(PVM pVM, PCDBGFADDRESS pAddress)
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| 135 | {
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| 136 | if (!VALID_PTR(pAddress))
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| 137 | return false;
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| 138 | if (!DBGFADDRESS_IS_VALID(pAddress))
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| 139 | return false;
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| 140 | /* more? */
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| 141 | return true;
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| 142 | }
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