[1] | 1 | /** @file
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| 2 | * SELM - The Selector Monitor(/Manager).
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| 3 | */
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| 4 |
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| 5 | /*
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[8155] | 6 | * Copyright (C) 2006-2007 Sun Microsystems, Inc.
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[1] | 7 | *
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| 8 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 9 | * available from http://www.virtualbox.org. This file is free software;
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| 10 | * you can redistribute it and/or modify it under the terms of the GNU
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[5999] | 11 | * General Public License (GPL) as published by the Free Software
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| 12 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 13 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 14 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 15 | *
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| 16 | * The contents of this file may alternatively be used under the terms
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| 17 | * of the Common Development and Distribution License Version 1.0
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| 18 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 19 | * VirtualBox OSE distribution, in which case the provisions of the
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| 20 | * CDDL are applicable instead of those of the GPL.
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| 21 | *
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| 22 | * You may elect to license modified versions of this file under the
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| 23 | * terms and conditions of either the GPL or the CDDL or both.
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[8155] | 24 | *
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| 25 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
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| 26 | * Clara, CA 95054 USA or visit http://www.sun.com if you need
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| 27 | * additional information or have any questions.
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[1] | 28 | */
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| 29 |
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[3632] | 30 | #ifndef ___VBox_selm_h
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| 31 | #define ___VBox_selm_h
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[1] | 32 |
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| 33 | #include <VBox/cdefs.h>
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| 34 | #include <VBox/types.h>
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[7133] | 35 | #include <VBox/x86.h>
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[1] | 36 |
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| 37 |
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| 38 | __BEGIN_DECLS
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| 39 |
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| 40 | /** @defgroup grp_selm The Selector Monitor(/Manager) API
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| 41 | * @{
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| 42 | */
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| 43 |
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| 44 | /**
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| 45 | * Returns Hypervisor's Trap 08 (\#DF) selector.
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| 46 | *
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| 47 | * @returns Hypervisor's Trap 08 (\#DF) selector.
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| 48 | * @param pVM VM Handle.
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| 49 | */
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| 50 | SELMDECL(RTSEL) SELMGetTrap8Selector(PVM pVM);
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| 51 |
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| 52 | /**
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| 53 | * Sets EIP of Hypervisor's Trap 08 (\#DF) TSS.
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| 54 | *
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| 55 | * @param pVM VM Handle.
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| 56 | * @param u32EIP EIP of Trap 08 handler.
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| 57 | */
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| 58 | SELMDECL(void) SELMSetTrap8EIP(PVM pVM, uint32_t u32EIP);
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| 59 |
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| 60 | /**
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| 61 | * Sets ss:esp for ring1 in main Hypervisor's TSS.
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| 62 | *
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| 63 | * @param pVM VM Handle.
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| 64 | * @param ss Ring1 SS register value.
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| 65 | * @param esp Ring1 ESP register value.
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| 66 | */
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| 67 | SELMDECL(void) SELMSetRing1Stack(PVM pVM, uint32_t ss, uint32_t esp);
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| 68 |
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| 69 | /**
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| 70 | * Gets ss:esp for ring1 in main Hypervisor's TSS.
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| 71 | *
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[99] | 72 | * @returns VBox status code.
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[1] | 73 | * @param pVM VM Handle.
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| 74 | * @param pSS Ring1 SS register value.
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| 75 | * @param pEsp Ring1 ESP register value.
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| 76 | */
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[99] | 77 | SELMDECL(int) SELMGetRing1Stack(PVM pVM, uint32_t *pSS, uint32_t *pEsp);
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[1] | 78 |
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| 79 | /**
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| 80 | * Returns Guest TSS pointer
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| 81 | *
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| 82 | * @param pVM VM Handle.
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| 83 | */
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| 84 | SELMDECL(RTGCPTR) SELMGetGuestTSS(PVM pVM);
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| 85 |
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| 86 | /**
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| 87 | * Gets the hypervisor code selector (CS).
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| 88 | * @returns CS selector.
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| 89 | * @param pVM The VM handle.
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| 90 | */
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| 91 | SELMDECL(RTSEL) SELMGetHyperCS(PVM pVM);
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| 92 |
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| 93 | /**
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| 94 | * Gets the 64-mode hypervisor code selector (CS64).
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| 95 | * @returns CS selector.
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| 96 | * @param pVM The VM handle.
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| 97 | */
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| 98 | SELMDECL(RTSEL) SELMGetHyperCS64(PVM pVM);
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| 99 |
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| 100 | /**
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| 101 | * Gets the hypervisor data selector (DS).
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| 102 | * @returns DS selector.
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| 103 | * @param pVM The VM handle.
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| 104 | */
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| 105 | SELMDECL(RTSEL) SELMGetHyperDS(PVM pVM);
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| 106 |
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| 107 | /**
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| 108 | * Gets the hypervisor TSS selector.
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| 109 | * @returns TSS selector.
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| 110 | * @param pVM The VM handle.
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| 111 | */
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| 112 | SELMDECL(RTSEL) SELMGetHyperTSS(PVM pVM);
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| 113 |
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| 114 | /**
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| 115 | * Gets the hypervisor TSS Trap 8 selector.
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| 116 | * @returns TSS Trap 8 selector.
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| 117 | * @param pVM The VM handle.
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| 118 | */
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| 119 | SELMDECL(RTSEL) SELMGetHyperTSSTrap08(PVM pVM);
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| 120 |
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| 121 | /**
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| 122 | * Gets the address for the hypervisor GDT.
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| 123 | *
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| 124 | * @returns The GDT address.
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| 125 | * @param pVM The VM handle.
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| 126 | * @remark This is intended only for very special use, like in the world
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| 127 | * switchers. Don't exploit this API!
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| 128 | */
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| 129 | SELMDECL(RTGCPTR) SELMGetHyperGDT(PVM pVM);
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| 130 |
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| 131 | /**
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| 132 | * Gets info about the current TSS.
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| 133 | *
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| 134 | * @returns VBox status code.
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| 135 | * @retval VINF_SUCCESS if we've got a TSS loaded.
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| 136 | * @retval VERR_SELM_NO_TSS if we haven't got a TSS (rather unlikely).
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| 137 | *
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| 138 | * @param pVM The VM handle.
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| 139 | * @param pGCPtrTss Where to store the TSS address.
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| 140 | * @param pcbTss Where to store the TSS size limit.
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| 141 | * @param pfCanHaveIOBitmap Where to store the can-have-I/O-bitmap indicator. (optional)
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| 142 | */
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| 143 | SELMDECL(int) SELMGetTSSInfo(PVM pVM, PRTGCUINTPTR pGCPtrTss, PRTGCUINTPTR pcbTss, bool *pfCanHaveIOBitmap);
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| 144 |
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| 145 | /**
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| 146 | * Converts a GC selector based address to a flat address.
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| 147 | *
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| 148 | * No limit checks are done. Use the SELMToFlat*() or SELMValidate*() functions
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| 149 | * for that.
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| 150 | *
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| 151 | * @returns Flat address.
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[2114] | 152 | * @param pVM VM Handle.
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| 153 | * @param eflags Current eflags
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| 154 | * @param Sel Selector part.
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| 155 | * @param pHiddenSel Hidden selector register
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| 156 | * @param Addr Address part.
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[1] | 157 | */
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[5397] | 158 | SELMDECL(RTGCPTR) SELMToFlat(PVM pVM, X86EFLAGS eflags, RTSEL Sel, PCPUMSELREGHID pHiddenSel, RTGCPTR Addr);
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[1] | 159 |
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| 160 | /** Flags for SELMToFlatEx().
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| 161 | * @{ */
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| 162 | /** Don't check the RPL,DPL or CPL. */
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[5605] | 163 | #define SELMTOFLAT_FLAGS_NO_PL RT_BIT(8)
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[1] | 164 | /** Flags contains CPL information. */
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[5605] | 165 | #define SELMTOFLAT_FLAGS_HAVE_CPL RT_BIT(9)
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[1] | 166 | /** CPL is 3. */
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| 167 | #define SELMTOFLAT_FLAGS_CPL3 3
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| 168 | /** CPL is 2. */
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| 169 | #define SELMTOFLAT_FLAGS_CPL2 2
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| 170 | /** CPL is 1. */
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| 171 | #define SELMTOFLAT_FLAGS_CPL1 1
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| 172 | /** CPL is 0. */
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| 173 | #define SELMTOFLAT_FLAGS_CPL0 0
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| 174 | /** Get the CPL from the flags. */
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| 175 | #define SELMTOFLAT_FLAGS_CPL(fFlags) ((fFlags) & X86_SEL_RPL)
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| 176 | /** Allow converting using Hypervisor GDT entries. */
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[5605] | 177 | #define SELMTOFLAT_FLAGS_HYPER RT_BIT(10)
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[1] | 178 | /** @} */
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| 179 |
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| 180 | /**
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| 181 | * Converts a GC selector based address to a flat address.
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| 182 | *
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| 183 | * Some basic checking is done, but not all kinds yet.
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| 184 | *
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| 185 | * @returns VBox status
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[2114] | 186 | * @param pVM VM Handle.
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| 187 | * @param eflags Current eflags
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| 188 | * @param Sel Selector part.
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| 189 | * @param Addr Address part.
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| 190 | * @param pHiddenSel Hidden selector register (can be NULL)
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| 191 | * @param fFlags SELMTOFLAT_FLAGS_*
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| 192 | * GDT entires are valid.
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| 193 | * @param ppvGC Where to store the GC flat address.
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| 194 | * @param pcb Where to store the bytes from *ppvGC which can be accessed according to
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| 195 | * the selector. NULL is allowed.
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[1] | 196 | */
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[5397] | 197 | SELMDECL(int) SELMToFlatEx(PVM pVM, X86EFLAGS eflags, RTSEL Sel, RTGCPTR Addr, PCPUMSELREGHID pHiddenSel, unsigned fFlags, PRTGCPTR ppvGC, uint32_t *pcb);
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[1] | 198 |
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| 199 | /**
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| 200 | * Validates and converts a GC selector based code address to a flat address.
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| 201 | *
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[5397] | 202 | * @returns VBox status code.
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[1] | 203 | * @param pVM VM Handle.
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[1357] | 204 | * @param eflags Current eflags
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[1] | 205 | * @param SelCPL Current privilege level. Get this from SS - CS might be conforming!
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| 206 | * A full selector can be passed, we'll only use the RPL part.
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| 207 | * @param SelCS Selector part.
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| 208 | * @param pHiddenSel The hidden CS selector register.
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| 209 | * @param Addr Address part.
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| 210 | * @param ppvFlat Where to store the flat address.
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| 211 | */
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[5397] | 212 | SELMDECL(int) SELMValidateAndConvertCSAddr(PVM pVM, X86EFLAGS eflags, RTSEL SelCPL, RTSEL SelCS, PCPUMSELREGHID pHiddenCSSel, RTGCPTR Addr, PRTGCPTR ppvFlat);
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[1] | 213 |
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| 214 | /**
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[5397] | 215 | * Validates and converts a GC selector based code address to a flat address.
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| 216 | *
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| 217 | * This is like SELMValidateAndConvertCSAddr + SELMIsSelector32Bit but with
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| 218 | * invalid hidden CS data. It's customized for dealing efficiently with CS
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| 219 | * at GC trap time.
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| 220 | *
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| 221 | * @returns VBox status code.
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| 222 | * @param pVM VM Handle.
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| 223 | * @param eflags Current eflags
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| 224 | * @param SelCPL Current privilege level. Get this from SS - CS might be conforming!
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| 225 | * A full selector can be passed, we'll only use the RPL part.
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| 226 | * @param SelCS Selector part.
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| 227 | * @param Addr Address part.
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| 228 | * @param ppvFlat Where to store the flat address.
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| 229 | * @param pcBits Where to store the 64-bit/32-bit/16-bit indicator.
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| 230 | */
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| 231 | SELMDECL(int) SELMValidateAndConvertCSAddrGCTrap(PVM pVM, X86EFLAGS eflags, RTSEL SelCPL, RTSEL SelCS, RTGCPTR Addr, PRTGCPTR ppvFlat, uint32_t *pcBits);
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| 232 |
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| 233 | /**
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[1] | 234 | * Checks if a selector is 32-bit or 16-bit.
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| 235 | *
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| 236 | * @returns True if it is 32-bit.
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| 237 | * @returns False if it is 16-bit.
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| 238 | * @param pVM VM Handle.
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[1357] | 239 | * @param eflags Current eflags register
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[1] | 240 | * @param Sel The selector.
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| 241 | * @param pHiddenSel The hidden selector register.
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| 242 | */
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[5397] | 243 | SELMDECL(bool) SELMIsSelector32Bit(PVM pVM, X86EFLAGS eflags, RTSEL Sel, PCPUMSELREGHID pHiddenSel);
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[1] | 244 |
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| 245 | /**
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| 246 | * Returns flat address and limit of LDT by LDT selector.
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| 247 | *
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| 248 | * Fully validate selector.
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| 249 | *
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| 250 | * @returns VBox status.
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| 251 | * @param pVM VM Handle.
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| 252 | * @param SelLdt LDT selector.
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| 253 | * @param ppvLdt Where to store the flat address of LDT.
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| 254 | * @param pcbLimit Where to store LDT limit.
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| 255 | */
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| 256 | SELMDECL(int) SELMGetLDTFromSel(PVM pVM, RTSEL SelLdt, PRTGCPTR ppvLdt, unsigned *pcbLimit);
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| 257 |
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| 258 |
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| 259 | /**
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| 260 | * Selector information structure.
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| 261 | */
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| 262 | typedef struct SELMSELINFO
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| 263 | {
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| 264 | /** The base address. */
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| 265 | RTGCPTR GCPtrBase;
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| 266 | /** The limit (-1). */
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| 267 | RTGCUINTPTR cbLimit;
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| 268 | /** The raw descriptor. */
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| 269 | VBOXDESC Raw;
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| 270 | /** The selector. */
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| 271 | RTSEL Sel;
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| 272 | /** Set if the selector is used by the hypervisor. */
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| 273 | bool fHyper;
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| 274 | /** Set if the selector is a real mode segment. */
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| 275 | bool fRealMode;
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| 276 | } SELMSELINFO;
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| 277 | /** Pointer to a SELM selector information struct. */
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| 278 | typedef SELMSELINFO *PSELMSELINFO;
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| 279 | /** Pointer to a const SELM selector information struct. */
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| 280 | typedef const SELMSELINFO *PCSELMSELINFO;
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| 281 |
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| 282 | /**
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| 283 | * Validates a CS selector.
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| 284 | *
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| 285 | * @returns VBox status code.
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| 286 | * @param pSelInfo Pointer to the selector information for the CS selector.
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| 287 | * @param SelCPL The selector defining the CPL (SS).
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| 288 | */
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| 289 | SELMDECL(int) SELMSelInfoValidateCS(PCSELMSELINFO pSelInfo, RTSEL SelCPL);
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| 290 |
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[4212] | 291 | /** @def SELMSelInfoIsExpandDown
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| 292 | * Tests whether the selector info describes an expand-down selector or now.
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| 293 | *
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| 294 | * @returns true / false.
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| 295 | * @param pSelInfo The selector info.
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| 296 | *
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| 297 | * @remark Realized as a macro for reasons of speed/lazyness and to avoid
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| 298 | * dragging in VBox/x86.h for now.
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| 299 | */
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| 300 | #define SELMSelInfoIsExpandDown(pSelInfo) \
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| 301 | ( (pSelInfo)->Raw.Gen.u1DescType \
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| 302 | && ((pSelInfo)->Raw.Gen.u4Type & (X86_SEL_TYPE_DOWN | X86_SEL_TYPE_CODE)) == X86_SEL_TYPE_DOWN)
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[1] | 303 |
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| 304 |
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[4212] | 305 |
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[1] | 306 | #ifdef IN_RING3
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| 307 | /** @defgroup grp_selm_r3 The Selector Monitor(/Manager) API
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| 308 | * @ingroup grp_selm
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| 309 | * @{
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| 310 | */
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| 311 |
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| 312 | /**
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| 313 | * Initializes the SELM.
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| 314 | *
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| 315 | * @returns VBox status code.
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| 316 | * @param pVM The VM to operate on.
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| 317 | */
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| 318 | SELMR3DECL(int) SELMR3Init(PVM pVM);
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| 319 |
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| 320 | /**
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| 321 | * Finalizes HMA page attributes.
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| 322 | *
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| 323 | * @returns VBox status code.
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| 324 | * @param pVM The VM handle.
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| 325 | */
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| 326 | SELMR3DECL(int) SELMR3InitFinalize(PVM pVM);
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| 327 |
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| 328 | /**
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| 329 | * Applies relocations to data and code managed by this
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| 330 | * component. This function will be called at init and
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| 331 | * whenever the VMM need to relocate it self inside the GC.
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| 332 | *
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| 333 | * @param pVM The VM.
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| 334 | */
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| 335 | SELMR3DECL(void) SELMR3Relocate(PVM pVM);
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| 336 |
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| 337 | /**
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| 338 | * Notification callback which is called whenever there is a chance that a CR3
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| 339 | * value might have changed.
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| 340 | * This is called by PGM.
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| 341 | *
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| 342 | * @param pVM The VM handle
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| 343 | */
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| 344 | SELMR3DECL(void) SELMR3PagingModeChanged(PVM pVM);
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| 345 |
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| 346 | /**
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| 347 | * Terminates the SELM.
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| 348 | *
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| 349 | * Termination means cleaning up and freeing all resources,
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| 350 | * the VM it self is at this point powered off or suspended.
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| 351 | *
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| 352 | * @returns VBox status code.
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| 353 | * @param pVM The VM to operate on.
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| 354 | */
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| 355 | SELMR3DECL(int) SELMR3Term(PVM pVM);
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| 356 |
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| 357 | /**
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| 358 | * The VM is being reset.
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| 359 | *
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| 360 | * For the SELM component this means that any GDT/LDT/TSS monitors
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| 361 | * needs to be removed.
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| 362 | *
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| 363 | * @param pVM VM handle.
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| 364 | */
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| 365 | SELMR3DECL(void) SELMR3Reset(PVM pVM);
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| 366 |
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| 367 | /**
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| 368 | * Updates the Guest GDT & LDT virtualization based on current CPU state.
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| 369 | *
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| 370 | * @returns VBox status code.
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| 371 | * @param pVM The VM to operate on.
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| 372 | */
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| 373 | SELMR3DECL(int) SELMR3UpdateFromCPUM(PVM pVM);
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| 374 |
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| 375 | /**
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| 376 | * Compares the Guest GDT and LDT with the shadow tables.
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| 377 | * This is a VBOX_STRICT only function.
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| 378 | *
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| 379 | * @returns VBox status code.
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| 380 | * @param pVM The VM Handle.
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| 381 | */
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| 382 | SELMR3DECL(int) SELMR3DebugCheck(PVM pVM);
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| 383 | #ifdef VBOX_STRICT
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| 384 | # define SELMR3DEBUGCHECK(pVM) SELMR3DebugCheck(pVM)
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| 385 | #else
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| 386 | # define SELMR3DEBUGCHECK(pVM) do { } while (0)
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| 387 | #endif
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| 388 |
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| 389 | /**
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| 390 | * Check if the TSS ring 0 stack selector and pointer were updated (for now)
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| 391 | *
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| 392 | * @returns VBox status code.
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| 393 | * @param pVM The VM to operate on.
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| 394 | */
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| 395 | SELMR3DECL(int) SELMR3SyncTSS(PVM pVM);
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| 396 |
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| 397 | /**
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| 398 | * Gets information about a selector.
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| 399 | * Intended for the debugger mostly and will prefer the guest
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| 400 | * descriptor tables over the shadow ones.
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| 401 | *
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| 402 | * @returns VINF_SUCCESS on success.
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| 403 | * @returns VERR_INVALID_SELECTOR if the selector isn't fully inside the descriptor table.
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| 404 | * @returns VERR_SELECTOR_NOT_PRESENT if the selector wasn't present.
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| 405 | * @returns VERR_PAGE_TABLE_NOT_PRESENT or VERR_PAGE_NOT_PRESENT if the pagetable or page
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| 406 | * backing the selector table wasn't present.
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| 407 | * @returns Other VBox status code on other errros.
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| 408 | *
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| 409 | * @param pVM VM handle.
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| 410 | * @param Sel The selector to get info about.
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| 411 | * @param pSelInfo Where to store the information.
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| 412 | */
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| 413 | SELMR3DECL(int) SELMR3GetSelectorInfo(PVM pVM, RTSEL Sel, PSELMSELINFO pSelInfo);
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| 414 |
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| 415 | /**
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| 416 | * Gets information about a selector from the shadow tables.
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| 417 | *
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| 418 | * This is intended to be faster than the SELMR3GetSelectorInfo() method, but requires
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| 419 | * that the caller ensures that the shadow tables are up to date.
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| 420 | *
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| 421 | * @returns VINF_SUCCESS on success.
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| 422 | * @returns VERR_INVALID_SELECTOR if the selector isn't fully inside the descriptor table.
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| 423 | * @returns VERR_SELECTOR_NOT_PRESENT if the selector wasn't present.
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| 424 | * @returns VERR_PAGE_TABLE_NOT_PRESENT or VERR_PAGE_NOT_PRESENT if the pagetable or page
|
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| 425 | * backing the selector table wasn't present.
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| 426 | * @returns Other VBox status code on other errors.
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| 427 | *
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| 428 | * @param pVM VM handle.
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| 429 | * @param Sel The selector to get info about.
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| 430 | * @param pSelInfo Where to store the information.
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| 431 | */
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| 432 | SELMR3DECL(int) SELMR3GetShadowSelectorInfo(PVM pVM, RTSEL Sel, PSELMSELINFO pSelInfo);
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| 433 |
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| 434 | /**
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| 435 | * Validates the RawR0 TSS values against the one in the Guest TSS.
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| 436 | *
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| 437 | * @returns true if it matches.
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| 438 | * @returns false and assertions on mismatch..
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| 439 | * @param pVM VM Handle.
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| 440 | */
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| 441 | SELMR3DECL(bool) SELMR3CheckTSS(PVM pVM);
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| 442 |
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| 443 |
|
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| 444 | /**
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| 445 | * Disable GDT/LDT/TSS monitoring and syncing
|
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| 446 | *
|
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| 447 | * @param pVM The VM to operate on.
|
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| 448 | */
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| 449 | SELMR3DECL(void) SELMR3DisableMonitoring(PVM pVM);
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| 450 |
|
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| 451 |
|
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| 452 | /**
|
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| 453 | * Dumps a descriptor.
|
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| 454 | *
|
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| 455 | * @param Desc Descriptor to dump.
|
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| 456 | * @param Sel Selector number.
|
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| 457 | * @param pszMsg Message to prepend the log entry with.
|
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| 458 | */
|
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| 459 | SELMR3DECL(void) SELMR3DumpDescriptor(VBOXDESC Desc, RTSEL Sel, const char *pszMsg);
|
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| 460 |
|
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| 461 | /**
|
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| 462 | * Dumps the hypervisor GDT.
|
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| 463 | *
|
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| 464 | * @param pVM VM handle.
|
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| 465 | */
|
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| 466 | SELMR3DECL(void) SELMR3DumpHyperGDT(PVM pVM);
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| 467 |
|
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| 468 | /**
|
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| 469 | * Dumps the hypervisor LDT.
|
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| 470 | *
|
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| 471 | * @param pVM VM handle.
|
---|
| 472 | */
|
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| 473 | SELMR3DECL(void) SELMR3DumpHyperLDT(PVM pVM);
|
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| 474 |
|
---|
| 475 | /**
|
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| 476 | * Dumps the guest GDT.
|
---|
| 477 | *
|
---|
| 478 | * @param pVM VM handle.
|
---|
| 479 | */
|
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| 480 | SELMR3DECL(void) SELMR3DumpGuestGDT(PVM pVM);
|
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| 481 |
|
---|
| 482 | /**
|
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| 483 | * Dumps the guest LDT.
|
---|
| 484 | *
|
---|
| 485 | * @param pVM VM handle.
|
---|
| 486 | */
|
---|
| 487 | SELMR3DECL(void) SELMR3DumpGuestLDT(PVM pVM);
|
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| 488 |
|
---|
| 489 | /** @} */
|
---|
| 490 | #endif
|
---|
| 491 |
|
---|
| 492 |
|
---|
| 493 | /** @} */
|
---|
| 494 | __END_DECLS
|
---|
| 495 |
|
---|
| 496 |
|
---|
| 497 | #endif
|
---|