[1] | 1 | /** @file
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| 2 | * TRPM - The Trap Monitor.
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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_trpm_h
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| 31 | #define ___VBox_trpm_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 | /** @defgroup grp_trpm The Trap Monitor API
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| 40 | * @{
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| 41 | */
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| 42 |
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| 43 | /**
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| 44 | * Trap: error code present or not
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| 45 | */
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| 46 | typedef enum
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| 47 | {
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| 48 | TRPM_TRAP_HAS_ERRORCODE = 0,
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[2123] | 49 | TRPM_TRAP_NO_ERRORCODE,
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| 50 | /** The usual 32-bit paranoia. */
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| 51 | TRPM_TRAP_32BIT_HACK = 0x7fffffff
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[1] | 52 | } TRPMERRORCODE;
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| 53 |
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| 54 | /**
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| 55 | * TRPM event type
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| 56 | */
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[2123] | 57 | /** Note: must match trpm.mac! */
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[1] | 58 | typedef enum
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| 59 | {
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[2123] | 60 | TRPM_TRAP = 0,
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| 61 | TRPM_HARDWARE_INT = 1,
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| 62 | TRPM_SOFTWARE_INT = 2,
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| 63 | /** The usual 32-bit paranoia. */
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| 64 | TRPM_32BIT_HACK = 0x7fffffff
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[1] | 65 | } TRPMEVENT;
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[2287] | 66 | /** Pointer to a TRPM event type. */
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| 67 | typedef TRPMEVENT *PTRPMEVENT;
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| 68 | /** Pointer to a const TRPM event type. */
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| 69 | typedef TRPMEVENT const *PCTRPMEVENT;
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[1] | 70 |
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| 71 | /**
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| 72 | * Invalid trap handler for trampoline calls
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| 73 | */
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| 74 | #define TRPM_INVALID_HANDLER 0
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| 75 |
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| 76 | /**
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| 77 | * Query info about the current active trap/interrupt.
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| 78 | * If no trap is active active an error code is returned.
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| 79 | *
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| 80 | * @returns VBox status code.
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| 81 | * @param pVM The virtual machine.
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| 82 | * @param pu8TrapNo Where to store the trap number.
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[2287] | 83 | * @param pEnmType Where to store the trap type.
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[1] | 84 | */
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[2287] | 85 | TRPMDECL(int) TRPMQueryTrap(PVM pVM, uint8_t *pu8TrapNo, PTRPMEVENT pEnmType);
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[1] | 86 |
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| 87 | /**
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| 88 | * Gets the trap number for the current trap.
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| 89 | *
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| 90 | * The caller is responsible for making sure there is an active trap which
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| 91 | * takes an error code when making this request.
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| 92 | *
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| 93 | * @returns The current trap number.
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| 94 | * @param pVM VM handle.
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| 95 | */
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| 96 | TRPMDECL(uint8_t) TRPMGetTrapNo(PVM pVM);
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| 97 |
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| 98 | /**
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| 99 | * Gets the error code for the current trap.
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| 100 | *
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| 101 | * The caller is responsible for making sure there is an active trap which
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| 102 | * takes an error code when making this request.
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| 103 | *
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| 104 | * @returns Error code.
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| 105 | * @param pVM VM handle.
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| 106 | */
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| 107 | TRPMDECL(RTGCUINT) TRPMGetErrorCode(PVM pVM);
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| 108 |
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| 109 | /**
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| 110 | * Gets the fault address for the current trap.
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| 111 | *
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| 112 | * The caller is responsible for making sure there is an active trap 0x0e when
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| 113 | * making this request.
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| 114 | *
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| 115 | * @returns Fault address associated with the trap.
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| 116 | * @param pVM VM handle.
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| 117 | */
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| 118 | TRPMDECL(RTGCUINTPTR) TRPMGetFaultAddress(PVM pVM);
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| 119 |
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| 120 | /**
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| 121 | * Clears the current active trap/exception/interrupt.
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| 122 | *
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| 123 | * The caller is responsible for making sure there is an active trap
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| 124 | * when making this request.
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| 125 | *
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| 126 | * @returns VBox status code.
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| 127 | * @param pVM The virtual machine handle.
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| 128 | */
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| 129 | TRPMDECL(int) TRPMResetTrap(PVM pVM);
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| 130 |
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| 131 | /**
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| 132 | * Assert trap/exception/interrupt.
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| 133 | *
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| 134 | * The caller is responsible for making sure there is no active trap
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| 135 | * when making this request.
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| 136 | *
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| 137 | * @returns VBox status code.
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| 138 | * @param pVM The virtual machine.
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| 139 | * @param u8TrapNo The trap vector to assert.
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[2123] | 140 | * @param enmType Trap type.
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[1] | 141 | */
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[2123] | 142 | TRPMDECL(int) TRPMAssertTrap(PVM pVM, uint8_t u8TrapNo, TRPMEVENT enmType);
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[1] | 143 |
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| 144 | /**
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| 145 | * Sets the error code of the current trap.
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| 146 | * (This function is for use in trap handlers and such.)
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| 147 | *
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| 148 | * The caller is responsible for making sure there is an active trap
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| 149 | * which takes an errorcode when making this request.
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| 150 | *
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| 151 | * @param pVM The virtual machine.
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| 152 | * @param uErrorCode The new error code.
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| 153 | */
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| 154 | TRPMDECL(void) TRPMSetErrorCode(PVM pVM, RTGCUINT uErrorCode);
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| 155 |
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| 156 | /**
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| 157 | * Sets the error code of the current trap.
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| 158 | * (This function is for use in trap handlers and such.)
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| 159 | *
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| 160 | * The caller is responsible for making sure there is an active trap 0e
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| 161 | * when making this request.
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| 162 | *
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| 163 | * @param pVM The virtual machine.
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| 164 | * @param uCR2 The new fault address (cr2 register).
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| 165 | */
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| 166 | TRPMDECL(void) TRPMSetFaultAddress(PVM pVM, RTGCUINTPTR uCR2);
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| 167 |
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| 168 | /**
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| 169 | * Checks if the current active trap/interrupt/exception/fault/whatever is a software
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| 170 | * interrupt or not.
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| 171 | *
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| 172 | * The caller is responsible for making sure there is an active trap
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| 173 | * when making this request.
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| 174 | *
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| 175 | * @returns true if software interrupt, false if not.
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| 176 | *
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| 177 | * @param pVM VM handle.
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| 178 | */
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| 179 | TRPMDECL(bool) TRPMIsSoftwareInterrupt(PVM pVM);
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| 180 |
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| 181 | /**
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| 182 | * Check if there is an active trap.
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| 183 | *
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| 184 | * @returns true if trap active, false if not.
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| 185 | * @param pVM The virtual machine.
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| 186 | */
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| 187 | TRPMDECL(bool) TRPMHasTrap(PVM pVM);
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| 188 |
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| 189 | /**
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| 190 | * Query all info about the current active trap/interrupt.
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| 191 | * If no trap is active active an error code is returned.
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| 192 | *
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| 193 | * @returns VBox status code.
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| 194 | * @param pVM The virtual machine.
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| 195 | * @param pu8TrapNo Where to store the trap number.
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[2123] | 196 | * @param pEnmType Where to store the trap type.
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[1] | 197 | * @param puErrorCode Where to store the error code associated with some traps.
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| 198 | * ~0U is stored if the trap have no error code.
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| 199 | * @param puCR2 Where to store the CR2 associated with a trap 0E.
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| 200 | */
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[2287] | 201 | TRPMDECL(int) TRPMQueryTrapAll(PVM pVM, uint8_t *pu8TrapNo, PTRPMEVENT pEnmType, PRTGCUINT puErrorCode, PRTGCUINTPTR puCR2);
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[1] | 202 |
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| 203 |
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| 204 | /**
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| 205 | * Save the active trap.
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| 206 | *
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| 207 | * This routine useful when doing try/catch in the hypervisor.
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| 208 | * Any function which uses temporary trap handlers should
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| 209 | * probably also use this facility to save the original trap.
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| 210 | *
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| 211 | * @param pVM VM handle.
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| 212 | */
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| 213 | TRPMDECL(void) TRPMSaveTrap(PVM pVM);
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| 214 |
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| 215 | /**
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| 216 | * Restore a saved trap.
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| 217 | *
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| 218 | * Multiple restores of a saved trap is possible.
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| 219 | *
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| 220 | * @param pVM VM handle.
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| 221 | */
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| 222 | TRPMDECL(void) TRPMRestoreTrap(PVM pVM);
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| 223 |
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| 224 | /**
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| 225 | * Forward trap or interrupt to the guest's handler
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| 226 | *
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| 227 | *
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| 228 | * @returns VBox status code.
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| 229 | * or does not return at all (when the trap is actually forwarded)
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| 230 | *
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| 231 | * @param pVM The VM to operate on.
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| 232 | * @param pRegFrame Pointer to the register frame for the trap.
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| 233 | * @param iGate Trap or interrupt gate number
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| 234 | * @param opsize Instruction size (only relevant for software interrupts)
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| 235 | * @param enmError TRPM_TRAP_HAS_ERRORCODE or TRPM_TRAP_NO_ERRORCODE.
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| 236 | * @param enmType TRPM event type
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| 237 | * @internal
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| 238 | */
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| 239 | TRPMDECL(int) TRPMForwardTrap(PVM pVM, PCPUMCTXCORE pRegFrame, uint32_t iGate, uint32_t opsize, TRPMERRORCODE enmError, TRPMEVENT enmType);
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| 240 |
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| 241 | /**
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| 242 | * Raises a cpu exception which doesn't take an error code.
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| 243 | *
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| 244 | * This function may or may not dispatch the exception before returning.
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| 245 | *
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| 246 | * @returns VBox status code fit for scheduling.
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| 247 | * @retval VINF_EM_RAW_GUEST_TRAP if the exception was left pending.
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| 248 | * @retval VINF_TRPM_XCPT_DISPATCHED if the exception was raised and dispatched for raw-mode execution.
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| 249 | * @retval VINF_EM_RESCHEDULE_REM if the exception was dispatched and cannot be executed in raw-mode.
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| 250 | *
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| 251 | * @param pVM The VM handle.
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| 252 | * @param pCtxCore The CPU context core.
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| 253 | * @param enmXcpt The exception.
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| 254 | */
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| 255 | TRPMDECL(int) TRPMRaiseXcpt(PVM pVM, PCPUMCTXCORE pCtxCore, X86XCPT enmXcpt);
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| 256 |
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| 257 | /**
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| 258 | * Raises a cpu exception with an errorcode.
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| 259 | *
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| 260 | * This function may or may not dispatch the exception before returning.
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| 261 | *
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| 262 | * @returns VBox status code fit for scheduling.
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| 263 | * @retval VINF_EM_RAW_GUEST_TRAP if the exception was left pending.
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| 264 | * @retval VINF_TRPM_XCPT_DISPATCHED if the exception was raised and dispatched for raw-mode execution.
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| 265 | * @retval VINF_EM_RESCHEDULE_REM if the exception was dispatched and cannot be executed in raw-mode.
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| 266 | *
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| 267 | * @param pVM The VM handle.
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| 268 | * @param pCtxCore The CPU context core.
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| 269 | * @param enmXcpt The exception.
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| 270 | * @param uErr The error code.
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| 271 | */
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| 272 | TRPMDECL(int) TRPMRaiseXcptErr(PVM pVM, PCPUMCTXCORE pCtxCore, X86XCPT enmXcpt, uint32_t uErr);
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| 273 |
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| 274 | /**
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| 275 | * Raises a cpu exception with an errorcode and CR2.
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| 276 | *
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| 277 | * This function may or may not dispatch the exception before returning.
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| 278 | *
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| 279 | * @returns VBox status code fit for scheduling.
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| 280 | * @retval VINF_EM_RAW_GUEST_TRAP if the exception was left pending.
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| 281 | * @retval VINF_TRPM_XCPT_DISPATCHED if the exception was raised and dispatched for raw-mode execution.
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| 282 | * @retval VINF_EM_RESCHEDULE_REM if the exception was dispatched and cannot be executed in raw-mode.
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| 283 | *
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| 284 | * @param pVM The VM handle.
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| 285 | * @param pCtxCore The CPU context core.
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| 286 | * @param enmXcpt The exception.
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| 287 | * @param uErr The error code.
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| 288 | * @param uCR2 The CR2 value.
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| 289 | */
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| 290 | TRPMDECL(int) TRPMRaiseXcptErrCR2(PVM pVM, PCPUMCTXCORE pCtxCore, X86XCPT enmXcpt, uint32_t uErr, RTGCUINTPTR uCR2);
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| 291 |
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| 292 |
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| 293 | #ifdef IN_RING3
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| 294 | /** @defgroup grp_trpm_r3 TRPM Host Context Ring 3 API
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| 295 | * @ingroup grp_trpm
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| 296 | * @{
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| 297 | */
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| 298 |
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| 299 | /**
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| 300 | * Initializes the SELM.
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| 301 | *
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| 302 | * @returns VBox status code.
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| 303 | * @param pVM The VM to operate on.
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| 304 | */
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| 305 | TRPMR3DECL(int) TRPMR3Init(PVM pVM);
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| 306 |
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| 307 | /**
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| 308 | * Applies relocations to data and code managed by this component.
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| 309 | *
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| 310 | * This function will be called at init and whenever the VMM need
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| 311 | * to relocate itself inside the GC.
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| 312 | *
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| 313 | * @param pVM The VM handle.
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| 314 | * @param offDelta Relocation delta relative to old location.
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| 315 | */
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| 316 | TRPMR3DECL(void) TRPMR3Relocate(PVM pVM, RTGCINTPTR offDelta);
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| 317 |
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| 318 | /**
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| 319 | * The VM is being reset.
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| 320 | *
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| 321 | * For the TRPM component this means that any IDT write monitors
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| 322 | * needs to be removed, any pending trap cleared, and the IDT reset.
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| 323 | *
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| 324 | * @param pVM VM handle.
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| 325 | */
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| 326 | TRPMR3DECL(void) TRPMR3Reset(PVM pVM);
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| 327 |
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| 328 | /**
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| 329 | * Set interrupt gate handler
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| 330 | * Used for setting up interrupt gates used for kernel calls.
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| 331 | *
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| 332 | * @returns VBox status code.
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| 333 | * @param pVM The VM to operate on.
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| 334 | * @param iTrap Interrupt number.
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| 335 | */
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| 336 | TRPMR3DECL(int) TRPMR3EnableGuestTrapHandler(PVM pVM, unsigned iTrap);
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| 337 |
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| 338 | /**
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| 339 | * Set guest trap/interrupt gate handler
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| 340 | * Used for setting up trap gates used for kernel calls.
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| 341 | *
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| 342 | * @returns VBox status code.
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| 343 | * @param pVM The VM to operate on.
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| 344 | * @param iTrap Interrupt/trap number.
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| 345 | * @parapm pHandler GC handler pointer
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| 346 | */
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| 347 | TRPMR3DECL(int) TRPMR3SetGuestTrapHandler(PVM pVM, unsigned iTrap, RTGCPTR pHandler);
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| 348 |
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| 349 | /**
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| 350 | * Get guest trap/interrupt gate handler
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| 351 | *
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| 352 | * @returns Guest trap handler address or TRPM_INVALID_HANDLER if none installed
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| 353 | * @param pVM The VM to operate on.
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| 354 | * @param iTrap Interrupt/trap number.
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| 355 | */
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| 356 | TRPMR3DECL(RTGCPTR) TRPMR3GetGuestTrapHandler(PVM pVM, unsigned iTrap);
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| 357 |
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| 358 | /**
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| 359 | * Disable IDT monitoring and syncing
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| 360 | *
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| 361 | * @param pVM The VM to operate on.
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| 362 | */
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| 363 | TRPMR3DECL(void) TRPMR3DisableMonitoring(PVM pVM);
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| 364 |
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| 365 | /**
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| 366 | * Check if gate handlers were updated
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| 367 | *
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| 368 | * @returns VBox status code.
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| 369 | * @param pVM The VM to operate on.
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| 370 | */
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| 371 | TRPMR3DECL(int) TRPMR3SyncIDT(PVM pVM);
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| 372 |
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| 373 | /**
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| 374 | * Check if address is a gate handler (interrupt/trap/task/anything).
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| 375 | *
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| 376 | * @returns True is gate handler, false if not.
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| 377 | *
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| 378 | * @param pVM VM handle.
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| 379 | * @param GCPtr GC address to check.
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| 380 | */
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| 381 | TRPMR3DECL(bool) TRPMR3IsGateHandler(PVM pVM, RTGCPTR GCPtr);
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| 382 |
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| 383 | /**
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| 384 | * Check if address is a gate handler (interrupt or trap).
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| 385 | *
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| 386 | * @returns gate nr or ~0 is not found
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| 387 | *
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| 388 | * @param pVM VM handle.
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| 389 | * @param GCPtr GC address to check.
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| 390 | */
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| 391 | TRPMR3DECL(uint32_t) TRPMR3QueryGateByHandler(PVM pVM, RTGCPTR GCPtr);
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| 392 |
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| 393 | /**
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| 394 | * Initializes the SELM.
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| 395 | *
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| 396 | * @returns VBox status code.
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| 397 | * @param pVM The VM to operate on.
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| 398 | */
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| 399 | TRPMR3DECL(int) TRPMR3Term(PVM pVM);
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| 400 |
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| 401 |
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| 402 | /**
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| 403 | * Inject event (such as external irq or trap)
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| 404 | *
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| 405 | * @returns VBox status code.
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| 406 | * @param pVM The VM to operate on.
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| 407 | * @param enmEvent Trpm event type
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| 408 | */
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| 409 | TRPMR3DECL(int) TRPMR3InjectEvent(PVM pVM, TRPMEVENT enmEvent);
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| 410 |
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| 411 | /** @} */
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| 412 | #endif
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| 413 |
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| 414 |
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| 415 | #ifdef IN_GC
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| 416 | /** @defgroup grp_trpm_gc The TRPM Guest Context API
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| 417 | * @ingroup grp_trpm
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| 418 | * @{
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| 419 | */
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| 420 |
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| 421 | /**
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| 422 | * Guest Context temporary trap handler
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| 423 | *
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| 424 | * @returns VBox status code (appropriate for GC return).
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| 425 | * In this context VBOX_SUCCESS means to restart the instruction.
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| 426 | * @param pVM VM handle.
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| 427 | * @param pRegFrame Trap register frame.
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| 428 | */
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| 429 | typedef DECLCALLBACK(int) FNTRPMGCTRAPHANDLER(PVM pVM, PCPUMCTXCORE pRegFrame);
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| 430 | /** Pointer to a TRPMGCTRAPHANDLER() function. */
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| 431 | typedef FNTRPMGCTRAPHANDLER *PFNTRPMGCTRAPHANDLER;
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| 432 |
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| 433 | /**
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| 434 | * Arms a temporary trap handler for traps in Hypervisor code.
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| 435 | *
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| 436 | * The operation is similar to a System V signal handler. I.e. when the handler
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| 437 | * is called it is first set to default action. So, if you need to handler more
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| 438 | * than one trap, you must reinstall the handler.
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| 439 | *
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| 440 | * To uninstall the temporary handler, call this function with pfnHandler set to NULL.
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| 441 | *
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| 442 | * @returns VBox status.
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| 443 | * @param pVM VM handle.
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| 444 | * @param iTrap Trap number to install handler [0..255].
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| 445 | * @param pfnHandler Pointer to the handler. Use NULL for uninstalling the handler.
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| 446 | */
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| 447 | TRPMGCDECL(int) TRPMGCSetTempHandler(PVM pVM, unsigned iTrap, PFNTRPMGCTRAPHANDLER pfnHandler);
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| 448 |
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| 449 | /**
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| 450 | * Return to host context from a hypervisor trap handler.
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| 451 | * It will also reset any traps that are pending.
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| 452 | *
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| 453 | * This function will *never* return.
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| 454 | *
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| 455 | * @param pVM The VM handle.
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| 456 | * @param rc The return code for host context.
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| 457 | */
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| 458 | TRPMGCDECL(void) TRPMGCHyperReturnToHost(PVM pVM, int rc);
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| 459 |
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| 460 | /** @} */
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| 461 | #endif
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| 462 |
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| 463 |
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| 464 | #ifdef IN_RING0
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| 465 | /** @defgroup grp_trpm_r0 TRPM Host Context Ring 0 API
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| 466 | * @ingroup grp_trpm
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| 467 | * @{
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| 468 | */
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| 469 |
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| 470 | /**
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[397] | 471 | * Dispatches an interrupt that arrived while we were in the guest context.
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| 472 | *
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| 473 | * @param pVM The VM handle.
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[416] | 474 | * @remark Must be called with interrupts disabled.
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[397] | 475 | */
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| 476 | TRPMR0DECL(void) TRPMR0DispatchHostInterrupt(PVM pVM);
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| 477 |
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| 478 | /**
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[1] | 479 | * Changes the VMMR0Entry() call frame and stack used by the IDT patch code
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| 480 | * so that we'll dispatch an interrupt rather than returning directly to Ring-3
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| 481 | * when VMMR0Entry() returns.
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| 482 | *
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| 483 | * @param pVM Pointer to the VM.
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| 484 | * @param pvRet Pointer to the return address of VMMR0Entry() on the stack.
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| 485 | */
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| 486 | TRPMR0DECL(void) TRPMR0SetupInterruptDispatcherFrame(PVM pVM, void *pvRet);
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| 487 |
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| 488 | /** @} */
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| 489 | #endif
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| 490 |
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| 491 | /** @} */
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| 492 | __END_DECLS
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| 493 |
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| 494 | #endif
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