[1] | 1 | /** @file
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| 2 | * PATM - Dynamic Guest OS Patching 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_patm_h
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| 27 | #define ___VBox_patm_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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| 31 | #include <VBox/dis.h>
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| 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_patm The Patch Manager API
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| 37 | * @{
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| 38 | */
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| 39 | #define MAX_PATCHES 512
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| 40 |
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| 41 | /**
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| 42 | * Flags for specifying the type of patch to install with PATMR3InstallPatch
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| 43 | * @{
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| 44 | */
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[5605] | 45 | #define PATMFL_CODE32 RT_BIT_64(0)
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| 46 | #define PATMFL_INTHANDLER RT_BIT_64(1)
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| 47 | #define PATMFL_SYSENTER RT_BIT_64(2)
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| 48 | #define PATMFL_GUEST_SPECIFIC RT_BIT_64(3)
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| 49 | #define PATMFL_USER_MODE RT_BIT_64(4)
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| 50 | #define PATMFL_IDTHANDLER RT_BIT_64(5)
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| 51 | #define PATMFL_TRAPHANDLER RT_BIT_64(6)
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| 52 | #define PATMFL_DUPLICATE_FUNCTION RT_BIT_64(7)
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| 53 | #define PATMFL_REPLACE_FUNCTION_CALL RT_BIT_64(8)
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| 54 | #define PATMFL_TRAPHANDLER_WITH_ERRORCODE RT_BIT_64(9)
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[1] | 55 | #define PATMFL_INTHANDLER_WITH_ERRORCODE (PATMFL_TRAPHANDLER_WITH_ERRORCODE)
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[5605] | 56 | #define PATMFL_MMIO_ACCESS RT_BIT_64(10)
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[1] | 57 | /* no more room -> change PATMInternal.h if more is needed!! */
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| 58 |
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| 59 | /*
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| 60 | * Flags above 1024 are reserved for internal use!
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| 61 | */
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| 62 | /** @} */
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| 63 |
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| 64 | /** Enable to activate sysenter emulation in GC. */
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[187] | 65 | /* #define PATM_EMULATE_SYSENTER */
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[1] | 66 |
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| 67 | /**
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| 68 | * Maximum number of cached VGA writes
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| 69 | */
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| 70 | #define MAX_VGA_WRITE_CACHE 64
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| 71 |
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| 72 | typedef struct PATMGCSTATE
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| 73 | {
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| 74 | // Virtual Flags register (IF + more later on)
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| 75 | uint32_t uVMFlags;
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| 76 |
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| 77 | /* Pending PATM actions (internal use only) */
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| 78 | uint32_t uPendingAction;
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| 79 |
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| 80 | // Records the number of times all patches are called (indicating how many exceptions we managed to avoid)
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| 81 | uint32_t uPatchCalls;
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| 82 | // Scratchpad dword
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| 83 | uint32_t uScratch;
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| 84 | // Debugging info
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| 85 | uint32_t uIretEFlags, uIretCS, uIretEIP;
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| 86 |
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| 87 | /* PATM stack pointer */
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| 88 | uint32_t Psp;
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| 89 |
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| 90 | /* PATM interrupt flag */
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| 91 | uint32_t fPIF;
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| 92 | /* PATM inhibit irq address (used by sti) */
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| 93 | RTGCPTR GCPtrInhibitInterrupts;
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| 94 |
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[740] | 95 | /* Scratch room for call patch */
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| 96 | RTGCPTR GCCallPatchTargetAddr;
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| 97 | RTGCPTR GCCallReturnAddr;
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| 98 |
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[1] | 99 | /* Temporary storage for guest registers. */
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| 100 | struct
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| 101 | {
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| 102 | uint32_t uEAX;
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| 103 | uint32_t uECX;
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| 104 | uint32_t uEDI;
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| 105 | uint32_t eFlags;
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| 106 | uint32_t uFlags;
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| 107 | } Restore;
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| 108 |
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| 109 | } PATMGCSTATE, *PPATMGCSTATE;
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| 110 |
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| 111 | typedef struct PATMTRAPREC
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| 112 | {
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| 113 | // pointer to original guest code instruction (for emulation)
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| 114 | RTGCPTR pNewEIP;
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| 115 | // pointer to the next guest code instruction
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| 116 | RTGCPTR pNextInstr;
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| 117 | //pointer to the corresponding next instruction in the patch block
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| 118 | RTGCPTR pNextPatchInstr;
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| 119 | } PATMTRAPREC, *PPATMTRAPREC;
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| 120 |
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| 121 |
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| 122 | /**
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| 123 | * Translation state (currently patch to GC ptr)
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| 124 | */
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| 125 | typedef enum
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| 126 | {
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| 127 | PATMTRANS_FAILED,
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| 128 | PATMTRANS_SAFE, /* Safe translation */
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| 129 | PATMTRANS_PATCHSTART, /* Instruction starts a patch block */
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| 130 | PATMTRANS_OVERWRITTEN, /* Instruction overwritten by patchjump */
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| 131 | PATMTRANS_INHIBITIRQ /* Instruction must be executed due to instruction fusing */
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| 132 | } PATMTRANSSTATE;
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| 133 |
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| 134 | /**
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| 135 | * Load virtualized flags.
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| 136 | *
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| 137 | * This function is called from CPUMRawEnter(). It doesn't have to update the
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| 138 | * IF and IOPL eflags bits, the caller will enforce those to set and 0 repectively.
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| 139 | *
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| 140 | * @param pVM VM handle.
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| 141 | * @param pCtxCore The cpu context core.
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| 142 | * @see pg_raw
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| 143 | */
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| 144 | PATMDECL(void) PATMRawEnter(PVM pVM, PCPUMCTXCORE pCtxCore);
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| 145 |
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| 146 | /**
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| 147 | * Restores virtualized flags.
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| 148 | *
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| 149 | * This function is called from CPUMRawLeave(). It will update the eflags register.
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| 150 | *
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| 151 | * @param pVM VM handle.
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| 152 | * @param pCtxCore The cpu context core.
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| 153 | * @param rawRC Raw mode return code
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| 154 | * @see @ref pg_raw
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| 155 | */
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| 156 | PATMDECL(void) PATMRawLeave(PVM pVM, PCPUMCTXCORE pCtxCore, int rawRC);
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| 157 |
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| 158 | /**
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| 159 | * Get the EFLAGS.
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| 160 | * This is a worker for CPUMRawGetEFlags().
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| 161 | *
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| 162 | * @returns The eflags.
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| 163 | * @param pVM The VM handle.
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| 164 | * @param pCtxCore The context core.
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| 165 | */
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| 166 | PATMDECL(uint32_t) PATMRawGetEFlags(PVM pVM, PCCPUMCTXCORE pCtxCore);
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| 167 |
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| 168 | /**
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| 169 | * Updates the EFLAGS.
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| 170 | * This is a worker for CPUMRawSetEFlags().
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| 171 | *
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| 172 | * @param pVM The VM handle.
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| 173 | * @param pCtxCore The context core.
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| 174 | * @param efl The new EFLAGS value.
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| 175 | */
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| 176 | PATMDECL(void) PATMRawSetEFlags(PVM pVM, PCPUMCTXCORE pCtxCore, uint32_t efl);
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| 177 |
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| 178 | /**
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| 179 | * Returns the guest context pointer of the GC context structure
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| 180 | *
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| 181 | * @returns VBox status code.
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| 182 | * @param pVM The VM to operate on.
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| 183 | */
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| 184 | PATMDECL(GCPTRTYPE(PPATMGCSTATE)) PATMQueryGCState(PVM pVM);
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| 185 |
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| 186 | /**
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| 187 | * Checks whether the GC address is part of our patch region
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| 188 | *
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| 189 | * @returns true -> yes, false -> no
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| 190 | * @param pVM The VM to operate on.
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| 191 | * @param pAddr Guest context address
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| 192 | */
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| 193 | PATMDECL(bool) PATMIsPatchGCAddr(PVM pVM, RTGCPTR pAddr);
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| 194 |
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| 195 | /**
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| 196 | * Check if we must use raw mode (patch code being executed or marked safe for IF=0)
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| 197 | *
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| 198 | * @param pVM VM handle.
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| 199 | * @param pAddrGC Guest context address
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| 200 | */
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| 201 | PATMDECL(bool) PATMShouldUseRawMode(PVM pVM, RTGCPTR pAddrGC);
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| 202 |
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| 203 | /**
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| 204 | * Query PATM state (enabled/disabled)
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| 205 | *
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| 206 | * @returns 0 - disabled, 1 - enabled
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| 207 | * @param pVM The VM to operate on.
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| 208 | */
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| 209 | #define PATMIsEnabled(pVM) (pVM->fPATMEnabled)
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| 210 |
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| 211 | /**
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| 212 | * Set parameters for pending MMIO patch operation
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| 213 | *
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| 214 | * @returns VBox status code.
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| 215 | * @param pDevIns Device instance.
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| 216 | * @param GCPhys MMIO physical address
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| 217 | * @param pCachedData GC pointer to cached data
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| 218 | */
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| 219 | PATMDECL(int) PATMSetMMIOPatchInfo(PVM pVM, RTGCPHYS GCPhys, RTGCPTR pCachedData);
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| 220 |
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| 221 |
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| 222 | /**
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| 223 | * Adds branch pair to the lookup cache of the particular branch instruction
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| 224 | *
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| 225 | * @returns VBox status
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| 226 | * @param pVM The VM to operate on.
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| 227 | * @param pJumpTableGC Pointer to branch instruction lookup cache
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| 228 | * @param pBranchTarget Original branch target
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| 229 | * @param pRelBranchPatch Relative duplicated function address
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| 230 | */
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[1133] | 231 | PATMDECL(int) PATMAddBranchToLookupCache(PVM pVM, RTGCPTR pJumpTableGC, RTGCPTR pBranchTarget, RTGCUINTPTR pRelBranchPatch);
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[1] | 232 |
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| 233 |
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| 234 | /**
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| 235 | * Checks if the int 3 was caused by a patched instruction
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| 236 | *
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| 237 | * @returns VBox status
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| 238 | *
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| 239 | * @param pVM The VM handle.
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| 240 | * @param pCtxCore The relevant core context.
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| 241 | */
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| 242 | PATMDECL(int) PATMHandleInt3PatchTrap(PVM pVM, PCPUMCTXCORE pRegFrame);
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| 243 |
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| 244 | /**
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| 245 | * Checks if the int 3 was caused by a patched instruction
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| 246 | *
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| 247 | * @returns VBox status
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| 248 | *
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| 249 | * @param pVM The VM handle.
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| 250 | * @param pInstrGC Instruction pointer
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| 251 | * @param pOpcode Original instruction opcode (out, optional)
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| 252 | * @param pSize Original instruction size (out, optional)
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| 253 | */
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| 254 | PATMDECL(bool) PATMIsInt3Patch(PVM pVM, RTGCPTR pInstrGC, uint32_t *pOpcode, uint32_t *pSize);
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| 255 |
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| 256 |
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| 257 | /**
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| 258 | * Checks if the interrupt flag is enabled or not.
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| 259 | *
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| 260 | * @returns true if it's enabled.
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| 261 | * @returns false if it's diabled.
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| 262 | *
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| 263 | * @param pVM The VM handle.
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| 264 | */
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| 265 | PATMDECL(bool) PATMAreInterruptsEnabled(PVM pVM);
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| 266 |
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| 267 | /**
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| 268 | * Checks if the interrupt flag is enabled or not.
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| 269 | *
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| 270 | * @returns true if it's enabled.
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| 271 | * @returns false if it's diabled.
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| 272 | *
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| 273 | * @param pVM The VM handle.
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| 274 | * @param pCtxCore CPU context
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| 275 | */
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| 276 | PATMDECL(bool) PATMAreInterruptsEnabledByCtxCore(PVM pVM, PCPUMCTXCORE pCtxCore);
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| 277 |
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| 278 | #ifdef PATM_EMULATE_SYSENTER
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| 279 | /**
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| 280 | * Emulate sysenter, sysexit and syscall instructions
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| 281 | *
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| 282 | * @returns VBox status
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| 283 | *
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| 284 | * @param pVM The VM handle.
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| 285 | * @param pCtxCore The relevant core context.
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| 286 | * @param pCpu Disassembly context
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| 287 | */
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| 288 | PATMDECL(int) PATMSysCall(PVM pVM, PCPUMCTXCORE pRegFrame, PDISCPUSTATE pCpu);
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| 289 | #endif
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| 290 |
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| 291 | #ifdef IN_GC
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| 292 | /** @defgroup grp_patm_gc The Patch Manager API
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| 293 | * @ingroup grp_patm
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| 294 | * @{
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| 295 | */
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| 296 |
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| 297 | /**
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| 298 | * Checks if the write is located on a page with was patched before.
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| 299 | * (if so, then we are not allowed to turn on r/w)
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| 300 | *
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| 301 | * @returns VBox status
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| 302 | * @param pVM The VM to operate on.
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| 303 | * @param pRegFrame CPU context
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| 304 | * @param GCPtr GC pointer to write address
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| 305 | * @param cbWrite Nr of bytes to write
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| 306 | *
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| 307 | */
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| 308 | PATMGCDECL(int) PATMGCHandleWriteToPatchPage(PVM pVM, PCPUMCTXCORE pRegFrame, RTGCPTR GCPtr, uint32_t cbWrite);
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| 309 |
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[1133] | 310 | /**
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| 311 | * Checks if the illegal instruction was caused by a patched instruction
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| 312 | *
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| 313 | * @returns VBox status
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| 314 | *
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| 315 | * @param pVM The VM handle.
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| 316 | * @param pCtxCore The relevant core context.
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| 317 | */
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| 318 | PATMDECL(int) PATMGCHandleIllegalInstrTrap(PVM pVM, PCPUMCTXCORE pRegFrame);
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| 319 |
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[1] | 320 | /** @} */
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| 321 |
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| 322 | #endif
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| 323 |
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| 324 | #ifdef IN_RING3
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| 325 | /** @defgroup grp_patm_r3 The Patch Manager API
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| 326 | * @ingroup grp_patm
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| 327 | * @{
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| 328 | */
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| 329 |
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| 330 | /**
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| 331 | * Query PATM state (enabled/disabled)
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| 332 | *
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| 333 | * @returns 0 - disabled, 1 - enabled
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| 334 | * @param pVM The VM to operate on.
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| 335 | */
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| 336 | PATMR3DECL(int) PATMR3IsEnabled(PVM pVM);
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| 337 |
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| 338 | /**
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| 339 | * Initializes the PATM.
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| 340 | *
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| 341 | * @returns VBox status code.
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| 342 | * @param pVM The VM to operate on.
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| 343 | */
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| 344 | PATMR3DECL(int) PATMR3Init(PVM pVM);
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| 345 |
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| 346 | /**
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| 347 | * Finalizes HMA page attributes.
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| 348 | *
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| 349 | * @returns VBox status code.
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| 350 | * @param pVM The VM handle.
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| 351 | */
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| 352 | PATMR3DECL(int) PATMR3InitFinalize(PVM pVM);
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| 353 |
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| 354 | /**
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| 355 | * Applies relocations to data and code managed by this
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| 356 | * component. This function will be called at init and
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| 357 | * whenever the VMM need to relocate it self inside the GC.
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| 358 | *
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| 359 | * The PATM will update the addresses used by the switcher.
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| 360 | *
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| 361 | * @param pVM The VM.
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| 362 | */
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| 363 | PATMR3DECL(void) PATMR3Relocate(PVM pVM);
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| 364 |
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| 365 | /**
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| 366 | * Terminates the PATM.
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| 367 | *
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| 368 | * Termination means cleaning up and freeing all resources,
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| 369 | * the VM it self is at this point powered off or suspended.
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| 370 | *
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| 371 | * @returns VBox status code.
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| 372 | * @param pVM The VM to operate on.
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| 373 | */
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| 374 | PATMR3DECL(int) PATMR3Term(PVM pVM);
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| 375 |
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| 376 | /**
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| 377 | * PATM reset callback.
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| 378 | *
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| 379 | * @returns VBox status code.
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| 380 | * @param pVM The VM which is reset.
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| 381 | */
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| 382 | PATMR3DECL(int) PATMR3Reset(PVM pVM);
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| 383 |
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| 384 | /**
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| 385 | * Returns the host context pointer and size of the patch memory block
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| 386 | *
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| 387 | * @returns VBox status code.
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| 388 | * @param pVM The VM to operate on.
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| 389 | * @param pcb Size of the patch memory block
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| 390 | */
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| 391 | PATMR3DECL(void *) PATMR3QueryPatchMemHC(PVM pVM, uint32_t *pcb);
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| 392 |
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| 393 | /**
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| 394 | * Returns the guest context pointer and size of the patch memory block
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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 | * @param pcb Size of the patch memory block
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| 399 | */
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| 400 | PATMR3DECL(RTGCPTR) PATMR3QueryPatchMemGC(PVM pVM, uint32_t *pcb);
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| 401 |
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| 402 | /**
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| 403 | * Checks whether the GC address is inside a generated patch jump
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| 404 | *
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| 405 | * @returns true -> yes, false -> no
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| 406 | * @param pVM The VM to operate on.
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| 407 | * @param pAddr Guest context address
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| 408 | * @param pPatchAddr Guest context patch address (if true)
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| 409 | */
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| 410 | PATMR3DECL(bool) PATMR3IsInsidePatchJump(PVM pVM, RTGCPTR pAddr, PRTGCPTR pPatchAddr);
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| 411 |
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| 412 |
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| 413 | /**
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| 414 | * Returns the GC pointer of the patch for the specified GC address
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| 415 | *
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| 416 | * @returns VBox status code.
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| 417 | * @param pVM The VM to operate on.
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| 418 | * @param pAddrGC Guest context address
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| 419 | */
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| 420 | PATMR3DECL(RTGCPTR) PATMR3QueryPatchGCPtr(PVM pVM, RTGCPTR pAddrGC);
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| 421 |
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| 422 | /**
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| 423 | * Checks whether the HC address is part of our patch region
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| 424 | *
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| 425 | * @returns VBox status code.
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| 426 | * @param pVM The VM to operate on.
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| 427 | * @param pAddrGC Guest context address
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| 428 | */
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[4787] | 429 | PATMR3DECL(bool) PATMR3IsPatchHCAddr(PVM pVM, R3PTRTYPE(uint8_t *) pAddrHC);
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[1] | 430 |
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| 431 | /**
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| 432 | * Convert a GC patch block pointer to a HC patch pointer
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| 433 | *
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| 434 | * @returns HC pointer or NULL if it's not a GC patch pointer
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| 435 | * @param pVM The VM to operate on.
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| 436 | * @param pAddrGC GC pointer
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| 437 | */
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[4787] | 438 | PATMR3DECL(R3PTRTYPE(void *)) PATMR3GCPtrToHCPtr(PVM pVM, RTGCPTR pAddrGC);
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[1] | 439 |
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| 440 |
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| 441 | /**
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| 442 | * Returns the host context pointer and size of the GC context structure
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| 443 | *
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| 444 | * @returns VBox status code.
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| 445 | * @param pVM The VM to operate on.
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| 446 | */
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| 447 | PATMR3DECL(PPATMGCSTATE) PATMR3QueryGCStateHC(PVM pVM);
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| 448 |
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| 449 | /**
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| 450 | * Handle trap inside patch code
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| 451 | *
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| 452 | * @returns VBox status code.
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| 453 | * @param pVM The VM to operate on.
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| 454 | * @param pCtx CPU context
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| 455 | * @param pEip GC pointer of trapping instruction
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| 456 | * @param pNewEip GC pointer to new instruction
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| 457 | */
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| 458 | PATMR3DECL(int) PATMR3HandleTrap(PVM pVM, PCPUMCTX pCtx, RTGCPTR pEip, RTGCPTR *ppNewEip);
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| 459 |
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| 460 | /**
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| 461 | * Handle page-fault in monitored page
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| 462 | *
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| 463 | * @returns VBox status code.
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| 464 | * @param pVM The VM to operate on.
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| 465 | */
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| 466 | PATMR3DECL(int) PATMR3HandleMonitoredPage(PVM pVM);
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| 467 |
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| 468 | /**
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| 469 | * Notifies PATM about a (potential) write to code that has been patched.
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| 470 | *
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| 471 | * @returns VBox status code.
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| 472 | * @param pVM The VM to operate on.
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| 473 | * @param GCPtr GC pointer to write address
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| 474 | * @param cbWrite Nr of bytes to write
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| 475 | *
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| 476 | */
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| 477 | PATMR3DECL(int) PATMR3PatchWrite(PVM pVM, RTGCPTR GCPtr, uint32_t cbWrite);
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| 478 |
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| 479 | /**
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| 480 | * Notify PATM of a page flush
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| 481 | *
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| 482 | * @returns VBox status code
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| 483 | * @param pVM The VM to operate on.
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| 484 | * @param addr GC address of the page to flush
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| 485 | */
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| 486 | PATMR3DECL(int) PATMR3FlushPage(PVM pVM, RTGCPTR addr);
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| 487 |
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| 488 | /**
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| 489 | * Allows or disallow patching of privileged instructions executed by the guest OS
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| 490 | *
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| 491 | * @returns VBox status code.
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| 492 | * @param pVM The VM to operate on.
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| 493 | * @param fAllowPatching Allow/disallow patching
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| 494 | */
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| 495 | PATMR3DECL(int) PATMR3AllowPatching(PVM pVM, uint32_t fAllowPatching);
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| 496 |
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| 497 | /**
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| 498 | * Patch privileged instruction at specified location
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| 499 | *
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| 500 | * @returns VBox status code.
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| 501 | * @param pVM The VM to operate on.
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[1085] | 502 | * @param pInstr Guest context point to privileged instruction (0:32 flat address)
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[1] | 503 | * @param flags Patch flags
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| 504 | *
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| 505 | * @note returns failure if patching is not allowed or possible
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| 506 | */
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| 507 | PATMR3DECL(int) PATMR3InstallPatch(PVM pVM, RTGCPTR pInstrGC, uint64_t flags);
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| 508 |
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| 509 | /**
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| 510 | * Gives hint to PATM about supervisor guest instructions
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| 511 | *
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| 512 | * @returns VBox status code.
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| 513 | * @param pVM The VM to operate on.
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| 514 | * @param pInstr Guest context point to privileged instruction
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| 515 | * @param flags Patch flags
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| 516 | */
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| 517 | PATMR3DECL(int) PATMR3AddHint(PVM pVM, RTGCPTR pInstrGC, uint32_t flags);
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| 518 |
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| 519 | /**
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| 520 | * Patch branch target function for call/jump at specified location.
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| 521 | * (in responds to a VINF_PATM_DUPLICATE_FUNCTION GC exit reason)
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| 522 | *
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| 523 | * @returns VBox status code.
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| 524 | * @param pVM The VM to operate on.
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| 525 | * @param pCtx Guest context
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| 526 | *
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| 527 | */
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| 528 | PATMR3DECL(int) PATMR3DuplicateFunctionRequest(PVM pVM, PCPUMCTX pCtx);
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| 529 |
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| 530 | /**
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| 531 | * Query the corresponding GC instruction pointer from a pointer inside the patch block itself
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| 532 | *
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| 533 | * @returns original GC instruction pointer or 0 if not found
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| 534 | * @param pVM The VM to operate on.
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| 535 | * @param pPatchGC GC address in patch block
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| 536 | * @param pEnmState State of the translated address (out)
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| 537 | *
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| 538 | */
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| 539 | PATMR3DECL(RTGCPTR) PATMR3PatchToGCPtr(PVM pVM, RTGCPTR pPatchGC, PATMTRANSSTATE *pEnmState);
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| 540 |
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| 541 | /**
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| 542 | * Converts Guest code GC ptr to Patch code GC ptr (if found)
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| 543 | *
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| 544 | * @returns corresponding GC pointer in patch block
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| 545 | * @param pVM The VM to operate on.
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| 546 | * @param pInstrGC Guest context pointer to privileged instruction
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| 547 | *
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| 548 | */
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| 549 | PATMR3DECL(RTGCPTR) PATMR3GuestGCPtrToPatchGCPtr(PVM pVM, GCPTRTYPE(uint8_t*) pInstrGC);
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| 550 |
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| 551 | /**
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| 552 | * Query the opcode of the original code that was overwritten by the 5 bytes patch jump
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| 553 | *
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| 554 | * @returns VBox status code.
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| 555 | * @param pVM The VM to operate on.
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| 556 | * @param pInstrGC GC address of instr
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| 557 | * @param pByte opcode byte pointer (OUT)
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| 558 | * @returns VBOX error code
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| 559 | *
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| 560 | */
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| 561 | PATMR3DECL(int) PATMR3QueryOpcode(PVM pVM, RTGCPTR pInstrGC, uint8_t *pByte);
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| 562 |
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| 563 | /**
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| 564 | * Disable patch for privileged instruction at specified location
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| 565 | *
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| 566 | * @returns VBox status code.
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| 567 | * @param pVM The VM to operate on.
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| 568 | * @param pInstr Guest context point to privileged instruction
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| 569 | *
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| 570 | * @note returns failure if patching is not allowed or possible
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| 571 | *
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| 572 | */
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| 573 | PATMR3DECL(int) PATMR3DisablePatch(PVM pVM, RTGCPTR pInstrGC);
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| 574 |
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| 575 |
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| 576 | /**
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| 577 | * Enable patch for privileged instruction at specified location
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| 578 | *
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| 579 | * @returns VBox status code.
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| 580 | * @param pVM The VM to operate on.
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| 581 | * @param pInstr Guest context point to privileged instruction
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| 582 | *
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| 583 | * @note returns failure if patching is not allowed or possible
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| 584 | *
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| 585 | */
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| 586 | PATMR3DECL(int) PATMR3EnablePatch(PVM pVM, RTGCPTR pInstrGC);
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| 587 |
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| 588 |
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| 589 | /**
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| 590 | * Remove patch for privileged instruction at specified location
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| 591 | *
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| 592 | * @returns VBox status code.
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| 593 | * @param pVM The VM to operate on.
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| 594 | * @param pInstr Guest context point to privileged instruction
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| 595 | *
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| 596 | * @note returns failure if patching is not allowed or possible
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| 597 | *
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| 598 | */
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| 599 | PATMR3DECL(int) PATMR3RemovePatch(PVM pVM, RTGCPTR pInstrGC);
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| 600 |
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| 601 |
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| 602 | /**
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| 603 | * Detects it the specified address falls within a 5 byte jump generated for an active patch.
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| 604 | * If so, this patch is permanently disabled.
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| 605 | *
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| 606 | * @param pVM The VM to operate on.
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| 607 | * @param pInstrGC Guest context pointer to instruction
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| 608 | * @param pConflictGC Guest context pointer to check
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| 609 | */
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| 610 | PATMR3DECL(int) PATMR3DetectConflict(PVM pVM, RTGCPTR pInstrGC, RTGCPTR pConflictGC);
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| 611 |
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| 612 |
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| 613 | /**
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| 614 | * Checks if the instructions at the specified address has been patched already.
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| 615 | *
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| 616 | * @returns boolean, patched or not
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| 617 | * @param pVM The VM to operate on.
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| 618 | * @param pInstrGC Guest context pointer to instruction
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| 619 | */
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| 620 | PATMR3DECL(bool) PATMR3HasBeenPatched(PVM pVM, RTGCPTR pInstrGC);
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| 621 |
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| 622 |
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| 623 | /**
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| 624 | * Install Linux 2.6 spinlock patch
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| 625 | *
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| 626 | * @returns VBox status code.
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| 627 | * @param pVM The VM to operate on
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| 628 | * @param pCallAcquireSpinlockGC GC pointer of call instruction
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| 629 | * @param cbAcquireSpinlockCall Instruction size
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| 630 | *
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| 631 | */
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| 632 | PATMR3DECL(int) PATMInstallSpinlockPatch(PVM pVM, RTGCPTR pCallAcquireSpinlockGC, uint32_t cbAcquireSpinlockCall);
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| 633 |
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| 634 |
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| 635 | /**
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| 636 | * Check if supplied call target is the Linux 2.6 spinlock acquire function
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| 637 | *
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| 638 | * @returns boolean
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| 639 | * @param pVM The VM to operate on
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| 640 | * @param pCallAcquireSpinlockGC Call target GC address
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| 641 | *
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| 642 | */
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| 643 | PATMR3DECL(bool) PATMIsSpinlockAcquire(PVM pVM, RTGCPTR pCallTargetGC);
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| 644 |
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| 645 | /**
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| 646 | * Check if supplied call target is the Linux 2.6 spinlock release function
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| 647 | *
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| 648 | * @returns boolean
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| 649 | * @param pVM The VM to operate on
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| 650 | * @param pCallTargetGC Call target GC address
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| 651 | *
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| 652 | */
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| 653 | PATMR3DECL(bool) PATMIsSpinlockRelease(PVM pVM, RTGCPTR pCallTargetGC);
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| 654 |
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| 655 | /**
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| 656 | * Check if supplied call target is the Linux 2.6 spinlock release function (patched equivalent)
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| 657 | *
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| 658 | * @returns boolean
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| 659 | * @param pVM The VM to operate on
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| 660 | * @param pCallTargetGC Call target GC address
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| 661 | *
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| 662 | */
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| 663 | PATMR3DECL(bool) PATMIsSpinlockReleasePatch(PVM pVM, RTGCPTR pCallTargetGC);
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| 664 |
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| 665 | /** @} */
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| 666 | #endif
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| 667 |
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| 668 |
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| 669 | /** @} */
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| 670 | __END_DECLS
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| 671 |
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| 672 |
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[3633] | 673 | #endif
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