[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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[2981] | 6 | * Copyright (C) 2006-2007 innotek GmbH
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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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[1] | 24 | */
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| 25 |
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[3632] | 26 | #ifndef ___VBox_selm_h
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| 27 | #define ___VBox_selm_h
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[1] | 28 |
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| 29 | #include <VBox/cdefs.h>
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| 30 | #include <VBox/types.h>
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[7133] | 31 | #include <VBox/x86.h>
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[1] | 32 |
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| 33 |
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| 34 | __BEGIN_DECLS
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| 35 |
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| 36 | /** @defgroup grp_selm The Selector Monitor(/Manager) API
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| 37 | * @{
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| 38 | */
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| 39 |
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| 40 | /**
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| 41 | * Returns Hypervisor's Trap 08 (\#DF) selector.
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| 42 | *
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| 43 | * @returns Hypervisor's Trap 08 (\#DF) selector.
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| 44 | * @param pVM VM Handle.
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| 45 | */
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| 46 | SELMDECL(RTSEL) SELMGetTrap8Selector(PVM pVM);
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| 47 |
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| 48 | /**
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| 49 | * Sets EIP of Hypervisor's Trap 08 (\#DF) TSS.
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| 50 | *
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| 51 | * @param pVM VM Handle.
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| 52 | * @param u32EIP EIP of Trap 08 handler.
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| 53 | */
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| 54 | SELMDECL(void) SELMSetTrap8EIP(PVM pVM, uint32_t u32EIP);
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| 55 |
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| 56 | /**
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| 57 | * Sets ss:esp for ring1 in main Hypervisor's TSS.
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| 58 | *
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| 59 | * @param pVM VM Handle.
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| 60 | * @param ss Ring1 SS register value.
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| 61 | * @param esp Ring1 ESP register value.
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| 62 | */
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| 63 | SELMDECL(void) SELMSetRing1Stack(PVM pVM, uint32_t ss, uint32_t esp);
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| 64 |
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| 65 | /**
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| 66 | * Gets ss:esp for ring1 in main Hypervisor's TSS.
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| 67 | *
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[99] | 68 | * @returns VBox status code.
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[1] | 69 | * @param pVM VM Handle.
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| 70 | * @param pSS Ring1 SS register value.
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| 71 | * @param pEsp Ring1 ESP register value.
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| 72 | */
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[99] | 73 | SELMDECL(int) SELMGetRing1Stack(PVM pVM, uint32_t *pSS, uint32_t *pEsp);
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[1] | 74 |
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| 75 | /**
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| 76 | * Returns Guest TSS pointer
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| 77 | *
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| 78 | * @param pVM VM Handle.
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| 79 | */
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| 80 | SELMDECL(RTGCPTR) SELMGetGuestTSS(PVM pVM);
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| 81 |
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| 82 | /**
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| 83 | * Gets the hypervisor code selector (CS).
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| 84 | * @returns CS selector.
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| 85 | * @param pVM The VM handle.
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| 86 | */
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| 87 | SELMDECL(RTSEL) SELMGetHyperCS(PVM pVM);
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| 88 |
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| 89 | /**
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| 90 | * Gets the 64-mode hypervisor code selector (CS64).
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| 91 | * @returns CS selector.
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| 92 | * @param pVM The VM handle.
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| 93 | */
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| 94 | SELMDECL(RTSEL) SELMGetHyperCS64(PVM pVM);
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| 95 |
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| 96 | /**
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| 97 | * Gets the hypervisor data selector (DS).
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| 98 | * @returns DS selector.
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| 99 | * @param pVM The VM handle.
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| 100 | */
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| 101 | SELMDECL(RTSEL) SELMGetHyperDS(PVM pVM);
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| 102 |
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| 103 | /**
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| 104 | * Gets the hypervisor TSS selector.
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| 105 | * @returns TSS selector.
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| 106 | * @param pVM The VM handle.
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| 107 | */
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| 108 | SELMDECL(RTSEL) SELMGetHyperTSS(PVM pVM);
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| 109 |
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| 110 | /**
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| 111 | * Gets the hypervisor TSS Trap 8 selector.
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| 112 | * @returns TSS Trap 8 selector.
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| 113 | * @param pVM The VM handle.
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| 114 | */
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| 115 | SELMDECL(RTSEL) SELMGetHyperTSSTrap08(PVM pVM);
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| 116 |
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| 117 | /**
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| 118 | * Gets the address for the hypervisor GDT.
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| 119 | *
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| 120 | * @returns The GDT address.
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| 121 | * @param pVM The VM handle.
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| 122 | * @remark This is intended only for very special use, like in the world
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| 123 | * switchers. Don't exploit this API!
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| 124 | */
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| 125 | SELMDECL(RTGCPTR) SELMGetHyperGDT(PVM pVM);
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| 126 |
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| 127 | /**
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| 128 | * Gets info about the current TSS.
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| 129 | *
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| 130 | * @returns VBox status code.
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| 131 | * @retval VINF_SUCCESS if we've got a TSS loaded.
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| 132 | * @retval VERR_SELM_NO_TSS if we haven't got a TSS (rather unlikely).
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| 133 | *
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| 134 | * @param pVM The VM handle.
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| 135 | * @param pGCPtrTss Where to store the TSS address.
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| 136 | * @param pcbTss Where to store the TSS size limit.
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| 137 | * @param pfCanHaveIOBitmap Where to store the can-have-I/O-bitmap indicator. (optional)
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| 138 | */
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| 139 | SELMDECL(int) SELMGetTSSInfo(PVM pVM, PRTGCUINTPTR pGCPtrTss, PRTGCUINTPTR pcbTss, bool *pfCanHaveIOBitmap);
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| 140 |
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| 141 | /**
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| 142 | * Converts a GC selector based address to a flat address.
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| 143 | *
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| 144 | * No limit checks are done. Use the SELMToFlat*() or SELMValidate*() functions
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| 145 | * for that.
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| 146 | *
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| 147 | * @returns Flat address.
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[2114] | 148 | * @param pVM VM Handle.
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| 149 | * @param eflags Current eflags
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| 150 | * @param Sel Selector part.
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| 151 | * @param pHiddenSel Hidden selector register
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| 152 | * @param Addr Address part.
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[1] | 153 | */
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[5397] | 154 | SELMDECL(RTGCPTR) SELMToFlat(PVM pVM, X86EFLAGS eflags, RTSEL Sel, PCPUMSELREGHID pHiddenSel, RTGCPTR Addr);
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[1] | 155 |
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| 156 | /** Flags for SELMToFlatEx().
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| 157 | * @{ */
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| 158 | /** Don't check the RPL,DPL or CPL. */
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[5605] | 159 | #define SELMTOFLAT_FLAGS_NO_PL RT_BIT(8)
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[1] | 160 | /** Flags contains CPL information. */
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[5605] | 161 | #define SELMTOFLAT_FLAGS_HAVE_CPL RT_BIT(9)
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[1] | 162 | /** CPL is 3. */
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| 163 | #define SELMTOFLAT_FLAGS_CPL3 3
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| 164 | /** CPL is 2. */
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| 165 | #define SELMTOFLAT_FLAGS_CPL2 2
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| 166 | /** CPL is 1. */
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| 167 | #define SELMTOFLAT_FLAGS_CPL1 1
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| 168 | /** CPL is 0. */
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| 169 | #define SELMTOFLAT_FLAGS_CPL0 0
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| 170 | /** Get the CPL from the flags. */
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| 171 | #define SELMTOFLAT_FLAGS_CPL(fFlags) ((fFlags) & X86_SEL_RPL)
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| 172 | /** Allow converting using Hypervisor GDT entries. */
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[5605] | 173 | #define SELMTOFLAT_FLAGS_HYPER RT_BIT(10)
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[1] | 174 | /** @} */
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| 175 |
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| 176 | /**
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| 177 | * Converts a GC selector based address to a flat address.
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| 178 | *
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| 179 | * Some basic checking is done, but not all kinds yet.
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| 180 | *
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| 181 | * @returns VBox status
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[2114] | 182 | * @param pVM VM Handle.
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| 183 | * @param eflags Current eflags
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| 184 | * @param Sel Selector part.
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| 185 | * @param Addr Address part.
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| 186 | * @param pHiddenSel Hidden selector register (can be NULL)
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| 187 | * @param fFlags SELMTOFLAT_FLAGS_*
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| 188 | * GDT entires are valid.
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| 189 | * @param ppvGC Where to store the GC flat address.
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| 190 | * @param pcb Where to store the bytes from *ppvGC which can be accessed according to
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| 191 | * the selector. NULL is allowed.
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[1] | 192 | */
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[5397] | 193 | 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] | 194 |
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| 195 | /**
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| 196 | * Validates and converts a GC selector based code address to a flat address.
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| 197 | *
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[5397] | 198 | * @returns VBox status code.
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[1] | 199 | * @param pVM VM Handle.
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[1357] | 200 | * @param eflags Current eflags
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[1] | 201 | * @param SelCPL Current privilege level. Get this from SS - CS might be conforming!
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| 202 | * A full selector can be passed, we'll only use the RPL part.
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| 203 | * @param SelCS Selector part.
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| 204 | * @param pHiddenSel The hidden CS selector register.
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| 205 | * @param Addr Address part.
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| 206 | * @param ppvFlat Where to store the flat address.
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| 207 | */
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[5397] | 208 | SELMDECL(int) SELMValidateAndConvertCSAddr(PVM pVM, X86EFLAGS eflags, RTSEL SelCPL, RTSEL SelCS, PCPUMSELREGHID pHiddenCSSel, RTGCPTR Addr, PRTGCPTR ppvFlat);
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[1] | 209 |
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| 210 | /**
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[5397] | 211 | * Validates and converts a GC selector based code address to a flat address.
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| 212 | *
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| 213 | * This is like SELMValidateAndConvertCSAddr + SELMIsSelector32Bit but with
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| 214 | * invalid hidden CS data. It's customized for dealing efficiently with CS
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| 215 | * at GC trap time.
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| 216 | *
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| 217 | * @returns VBox status code.
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| 218 | * @param pVM VM Handle.
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| 219 | * @param eflags Current eflags
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| 220 | * @param SelCPL Current privilege level. Get this from SS - CS might be conforming!
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| 221 | * A full selector can be passed, we'll only use the RPL part.
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| 222 | * @param SelCS Selector part.
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| 223 | * @param Addr Address part.
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| 224 | * @param ppvFlat Where to store the flat address.
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| 225 | * @param pcBits Where to store the 64-bit/32-bit/16-bit indicator.
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| 226 | */
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| 227 | SELMDECL(int) SELMValidateAndConvertCSAddrGCTrap(PVM pVM, X86EFLAGS eflags, RTSEL SelCPL, RTSEL SelCS, RTGCPTR Addr, PRTGCPTR ppvFlat, uint32_t *pcBits);
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| 228 |
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| 229 | /**
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[1] | 230 | * Checks if a selector is 32-bit or 16-bit.
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| 231 | *
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| 232 | * @returns True if it is 32-bit.
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| 233 | * @returns False if it is 16-bit.
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| 234 | * @param pVM VM Handle.
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[1357] | 235 | * @param eflags Current eflags register
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[1] | 236 | * @param Sel The selector.
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| 237 | * @param pHiddenSel The hidden selector register.
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| 238 | */
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[5397] | 239 | SELMDECL(bool) SELMIsSelector32Bit(PVM pVM, X86EFLAGS eflags, RTSEL Sel, PCPUMSELREGHID pHiddenSel);
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[1] | 240 |
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| 241 | /**
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| 242 | * Returns flat address and limit of LDT by LDT selector.
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| 243 | *
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| 244 | * Fully validate selector.
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| 245 | *
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| 246 | * @returns VBox status.
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| 247 | * @param pVM VM Handle.
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| 248 | * @param SelLdt LDT selector.
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| 249 | * @param ppvLdt Where to store the flat address of LDT.
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| 250 | * @param pcbLimit Where to store LDT limit.
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| 251 | */
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| 252 | SELMDECL(int) SELMGetLDTFromSel(PVM pVM, RTSEL SelLdt, PRTGCPTR ppvLdt, unsigned *pcbLimit);
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| 253 |
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| 254 |
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| 255 | /**
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| 256 | * Selector information structure.
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| 257 | */
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| 258 | typedef struct SELMSELINFO
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| 259 | {
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| 260 | /** The base address. */
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| 261 | RTGCPTR GCPtrBase;
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| 262 | /** The limit (-1). */
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| 263 | RTGCUINTPTR cbLimit;
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| 264 | /** The raw descriptor. */
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| 265 | VBOXDESC Raw;
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| 266 | /** The selector. */
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| 267 | RTSEL Sel;
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| 268 | /** Set if the selector is used by the hypervisor. */
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| 269 | bool fHyper;
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| 270 | /** Set if the selector is a real mode segment. */
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| 271 | bool fRealMode;
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| 272 | } SELMSELINFO;
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| 273 | /** Pointer to a SELM selector information struct. */
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| 274 | typedef SELMSELINFO *PSELMSELINFO;
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| 275 | /** Pointer to a const SELM selector information struct. */
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| 276 | typedef const SELMSELINFO *PCSELMSELINFO;
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| 277 |
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| 278 | /**
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| 279 | * Validates a CS selector.
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| 280 | *
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| 281 | * @returns VBox status code.
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| 282 | * @param pSelInfo Pointer to the selector information for the CS selector.
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| 283 | * @param SelCPL The selector defining the CPL (SS).
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| 284 | */
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| 285 | SELMDECL(int) SELMSelInfoValidateCS(PCSELMSELINFO pSelInfo, RTSEL SelCPL);
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| 286 |
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[4212] | 287 | /** @def SELMSelInfoIsExpandDown
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| 288 | * Tests whether the selector info describes an expand-down selector or now.
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| 289 | *
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| 290 | * @returns true / false.
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| 291 | * @param pSelInfo The selector info.
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| 292 | *
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| 293 | * @remark Realized as a macro for reasons of speed/lazyness and to avoid
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| 294 | * dragging in VBox/x86.h for now.
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| 295 | */
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| 296 | #define SELMSelInfoIsExpandDown(pSelInfo) \
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| 297 | ( (pSelInfo)->Raw.Gen.u1DescType \
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| 298 | && ((pSelInfo)->Raw.Gen.u4Type & (X86_SEL_TYPE_DOWN | X86_SEL_TYPE_CODE)) == X86_SEL_TYPE_DOWN)
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[1] | 299 |
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| 300 |
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[4212] | 301 |
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[1] | 302 | #ifdef IN_RING3
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| 303 | /** @defgroup grp_selm_r3 The Selector Monitor(/Manager) API
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| 304 | * @ingroup grp_selm
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| 305 | * @{
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| 306 | */
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| 307 |
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| 308 | /**
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| 309 | * Initializes the SELM.
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| 310 | *
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| 311 | * @returns VBox status code.
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| 312 | * @param pVM The VM to operate on.
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| 313 | */
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| 314 | SELMR3DECL(int) SELMR3Init(PVM pVM);
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| 315 |
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| 316 | /**
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| 317 | * Finalizes HMA page attributes.
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| 318 | *
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| 319 | * @returns VBox status code.
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| 320 | * @param pVM The VM handle.
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| 321 | */
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| 322 | SELMR3DECL(int) SELMR3InitFinalize(PVM pVM);
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| 323 |
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| 324 | /**
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| 325 | * Applies relocations to data and code managed by this
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| 326 | * component. This function will be called at init and
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| 327 | * whenever the VMM need to relocate it self inside the GC.
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| 328 | *
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| 329 | * @param pVM The VM.
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| 330 | */
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| 331 | SELMR3DECL(void) SELMR3Relocate(PVM pVM);
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| 332 |
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| 333 | /**
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| 334 | * Notification callback which is called whenever there is a chance that a CR3
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| 335 | * value might have changed.
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| 336 | * This is called by PGM.
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| 337 | *
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| 338 | * @param pVM The VM handle
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| 339 | */
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| 340 | SELMR3DECL(void) SELMR3PagingModeChanged(PVM pVM);
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| 341 |
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| 342 | /**
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| 343 | * Terminates the SELM.
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| 344 | *
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| 345 | * Termination means cleaning up and freeing all resources,
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| 346 | * the VM it self is at this point powered off or suspended.
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| 347 | *
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| 348 | * @returns VBox status code.
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| 349 | * @param pVM The VM to operate on.
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| 350 | */
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| 351 | SELMR3DECL(int) SELMR3Term(PVM pVM);
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| 352 |
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| 353 | /**
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| 354 | * The VM is being reset.
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| 355 | *
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| 356 | * For the SELM component this means that any GDT/LDT/TSS monitors
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| 357 | * needs to be removed.
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| 358 | *
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| 359 | * @param pVM VM handle.
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| 360 | */
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| 361 | SELMR3DECL(void) SELMR3Reset(PVM pVM);
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| 362 |
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| 363 | /**
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| 364 | * Updates the Guest GDT & LDT virtualization based on current CPU state.
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| 365 | *
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| 366 | * @returns VBox status code.
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| 367 | * @param pVM The VM to operate on.
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| 368 | */
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| 369 | SELMR3DECL(int) SELMR3UpdateFromCPUM(PVM pVM);
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| 370 |
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| 371 | /**
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| 372 | * Compares the Guest GDT and LDT with the shadow tables.
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| 373 | * This is a VBOX_STRICT only function.
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| 374 | *
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| 375 | * @returns VBox status code.
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| 376 | * @param pVM The VM Handle.
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| 377 | */
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| 378 | SELMR3DECL(int) SELMR3DebugCheck(PVM pVM);
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| 379 | #ifdef VBOX_STRICT
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| 380 | # define SELMR3DEBUGCHECK(pVM) SELMR3DebugCheck(pVM)
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| 381 | #else
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| 382 | # define SELMR3DEBUGCHECK(pVM) do { } while (0)
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| 383 | #endif
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| 384 |
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| 385 | /**
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| 386 | * Check if the TSS ring 0 stack selector and pointer were updated (for now)
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| 387 | *
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| 388 | * @returns VBox status code.
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| 389 | * @param pVM The VM to operate on.
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| 390 | */
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| 391 | SELMR3DECL(int) SELMR3SyncTSS(PVM pVM);
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| 392 |
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| 393 | /**
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| 394 | * Gets information about a selector.
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| 395 | * Intended for the debugger mostly and will prefer the guest
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| 396 | * descriptor tables over the shadow ones.
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| 397 | *
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| 398 | * @returns VINF_SUCCESS on success.
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| 399 | * @returns VERR_INVALID_SELECTOR if the selector isn't fully inside the descriptor table.
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| 400 | * @returns VERR_SELECTOR_NOT_PRESENT if the selector wasn't present.
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| 401 | * @returns VERR_PAGE_TABLE_NOT_PRESENT or VERR_PAGE_NOT_PRESENT if the pagetable or page
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| 402 | * backing the selector table wasn't present.
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| 403 | * @returns Other VBox status code on other errros.
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| 404 | *
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| 405 | * @param pVM VM handle.
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| 406 | * @param Sel The selector to get info about.
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| 407 | * @param pSelInfo Where to store the information.
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| 408 | */
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| 409 | SELMR3DECL(int) SELMR3GetSelectorInfo(PVM pVM, RTSEL Sel, PSELMSELINFO pSelInfo);
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| 410 |
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| 411 | /**
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| 412 | * Gets information about a selector from the shadow tables.
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| 413 | *
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| 414 | * This is intended to be faster than the SELMR3GetSelectorInfo() method, but requires
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| 415 | * that the caller ensures that the shadow tables are up to date.
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| 416 | *
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| 417 | * @returns VINF_SUCCESS on success.
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| 418 | * @returns VERR_INVALID_SELECTOR if the selector isn't fully inside the descriptor table.
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| 419 | * @returns VERR_SELECTOR_NOT_PRESENT if the selector wasn't present.
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| 420 | * @returns VERR_PAGE_TABLE_NOT_PRESENT or VERR_PAGE_NOT_PRESENT if the pagetable or page
|
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| 421 | * backing the selector table wasn't present.
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| 422 | * @returns Other VBox status code on other errors.
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| 423 | *
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| 424 | * @param pVM VM handle.
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| 425 | * @param Sel The selector to get info about.
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| 426 | * @param pSelInfo Where to store the information.
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| 427 | */
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| 428 | SELMR3DECL(int) SELMR3GetShadowSelectorInfo(PVM pVM, RTSEL Sel, PSELMSELINFO pSelInfo);
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| 429 |
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| 430 | /**
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| 431 | * Validates the RawR0 TSS values against the one in the Guest TSS.
|
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| 432 | *
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| 433 | * @returns true if it matches.
|
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| 434 | * @returns false and assertions on mismatch..
|
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| 435 | * @param pVM VM Handle.
|
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| 436 | */
|
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| 437 | SELMR3DECL(bool) SELMR3CheckTSS(PVM pVM);
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| 438 |
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| 439 |
|
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| 440 | /**
|
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| 441 | * Disable GDT/LDT/TSS monitoring and syncing
|
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| 442 | *
|
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| 443 | * @param pVM The VM to operate on.
|
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| 444 | */
|
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| 445 | SELMR3DECL(void) SELMR3DisableMonitoring(PVM pVM);
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| 446 |
|
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| 447 |
|
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| 448 | /**
|
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| 449 | * Dumps a descriptor.
|
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| 450 | *
|
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| 451 | * @param Desc Descriptor to dump.
|
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| 452 | * @param Sel Selector number.
|
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| 453 | * @param pszMsg Message to prepend the log entry with.
|
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| 454 | */
|
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| 455 | SELMR3DECL(void) SELMR3DumpDescriptor(VBOXDESC Desc, RTSEL Sel, const char *pszMsg);
|
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| 456 |
|
---|
| 457 | /**
|
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| 458 | * Dumps the hypervisor GDT.
|
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| 459 | *
|
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| 460 | * @param pVM VM handle.
|
---|
| 461 | */
|
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| 462 | SELMR3DECL(void) SELMR3DumpHyperGDT(PVM pVM);
|
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| 463 |
|
---|
| 464 | /**
|
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| 465 | * Dumps the hypervisor LDT.
|
---|
| 466 | *
|
---|
| 467 | * @param pVM VM handle.
|
---|
| 468 | */
|
---|
| 469 | SELMR3DECL(void) SELMR3DumpHyperLDT(PVM pVM);
|
---|
| 470 |
|
---|
| 471 | /**
|
---|
| 472 | * Dumps the guest GDT.
|
---|
| 473 | *
|
---|
| 474 | * @param pVM VM handle.
|
---|
| 475 | */
|
---|
| 476 | SELMR3DECL(void) SELMR3DumpGuestGDT(PVM pVM);
|
---|
| 477 |
|
---|
| 478 | /**
|
---|
| 479 | * Dumps the guest LDT.
|
---|
| 480 | *
|
---|
| 481 | * @param pVM VM handle.
|
---|
| 482 | */
|
---|
| 483 | SELMR3DECL(void) SELMR3DumpGuestLDT(PVM pVM);
|
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| 484 |
|
---|
| 485 | /** @} */
|
---|
| 486 | #endif
|
---|
| 487 |
|
---|
| 488 |
|
---|
| 489 | /** @} */
|
---|
| 490 | __END_DECLS
|
---|
| 491 |
|
---|
| 492 |
|
---|
| 493 | #endif
|
---|