| 1 | /* $Id: CSAMInternal.h 76585 2019-01-01 06:31:29Z vboxsync $ */
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| 2 | /** @file
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| 3 | * CSAM - Internal header file.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2019 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | */
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| 17 |
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| 18 | #ifndef VMM_INCLUDED_SRC_include_CSAMInternal_h
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| 19 | #define VMM_INCLUDED_SRC_include_CSAMInternal_h
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| 20 | #ifndef RT_WITHOUT_PRAGMA_ONCE
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| 21 | # pragma once
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| 22 | #endif
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| 23 |
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| 24 | #include <VBox/cdefs.h>
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| 25 | #include <VBox/types.h>
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| 26 | #include <VBox/vmm/csam.h>
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| 27 | #include <VBox/dis.h>
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| 28 | #include <VBox/log.h>
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| 29 |
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| 30 |
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| 31 |
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| 32 | /** @name Page flags.
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| 33 | * These are placed in the three bits available for system programs in
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| 34 | * the page entries.
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| 35 | * @{ */
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| 36 | #ifndef PGM_PTFLAGS_CSAM_VALIDATED
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| 37 | /** Scanned and approved by CSAM (tm). */
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| 38 | /** NOTE: Must be identical to the one defined in PGMInternal.h!! */
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| 39 | #define PGM_PTFLAGS_CSAM_VALIDATED RT_BIT_64(11)
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| 40 | #endif
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| 41 |
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| 42 | /** @} */
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| 43 |
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| 44 | #define CSAM_SAVED_STATE_VERSION CSAM_SAVED_STATE_VERSION_PUT_STRUCT
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| 45 | #define CSAM_SAVED_STATE_VERSION_PUT_STRUCT 15
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| 46 | #define CSAM_SAVED_STATE_VERSION_PUT_MEM 14
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| 47 |
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| 48 | #define CSAM_PGDIRBMP_CHUNKS 1024
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| 49 |
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| 50 | #define CSAM_PAGE_BITMAP_SIZE (PAGE_SIZE/(sizeof(uint8_t)*8))
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| 51 |
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| 52 | /* Maximum nr of dirty page that are cached. */
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| 53 | #define CSAM_MAX_DIRTY_PAGES 32
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| 54 |
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| 55 | /* Maximum number of cached addresses of dangerous instructions that have been scanned before. */
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| 56 | #define CSAM_MAX_DANGR_INSTR 16 /* power of two! */
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| 57 | #define CSAM_MAX_DANGR_INSTR_MASK (CSAM_MAX_DANGR_INSTR-1)
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| 58 |
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| 59 | /* Maximum number of possible dangerous code pages that we'll flush after a world switch */
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| 60 | #define CSAM_MAX_CODE_PAGES_FLUSH 32
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| 61 |
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| 62 | #define CSAM_MAX_CALLEXIT_RET 16
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| 63 |
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| 64 | /* copy from PATMInternal.h */
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| 65 | #define SIZEOF_NEARJUMP32 5 //opcode byte + 4 byte relative offset
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| 66 |
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| 67 | typedef struct
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| 68 | {
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| 69 | RTRCPTR pInstrAfterRetGC[CSAM_MAX_CALLEXIT_RET];
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| 70 | uint32_t cInstrAfterRet;
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| 71 | } CSAMCALLEXITREC, *PCSAMCALLEXITREC;
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| 72 |
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| 73 | typedef struct
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| 74 | {
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| 75 | R3PTRTYPE(uint8_t *) pPageLocStartHC;
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| 76 | R3PTRTYPE(uint8_t *) pPageLocEndHC;
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| 77 | RCPTRTYPE(uint8_t *) pGuestLoc;
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| 78 | uint32_t depth; //call/jump depth
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| 79 |
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| 80 | PCSAMCALLEXITREC pCallExitRec;
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| 81 |
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| 82 | PGMPAGEMAPLOCK Lock;
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| 83 | } CSAMP2GLOOKUPREC, *PCSAMP2GLOOKUPREC;
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| 84 |
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| 85 | typedef struct
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| 86 | {
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| 87 | RTRCPTR pPageGC;
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| 88 | RTGCPHYS GCPhys;
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| 89 | uint64_t fFlags;
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| 90 | uint32_t uSize;
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| 91 |
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| 92 | uint8_t *pBitmap;
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| 93 |
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| 94 | bool fCode32;
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| 95 | bool fMonitorActive;
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| 96 | bool fMonitorInvalidation;
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| 97 |
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| 98 | CSAMTAG enmTag;
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| 99 |
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| 100 | uint64_t u64Hash;
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| 101 | } CSAMPAGE, *PCSAMPAGE;
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| 102 |
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| 103 | typedef struct
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| 104 | {
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| 105 | // GC Patch pointer
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| 106 | RTRCPTR pInstrGC;
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| 107 |
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| 108 | // Disassembly state for original instruction
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| 109 | DISCPUSTATE cpu;
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| 110 |
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| 111 | uint32_t uState;
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| 112 |
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| 113 | PCSAMPAGE pPage;
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| 114 | } CSAMPATCH, *PCSAMPATCH;
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| 115 |
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| 116 | /**
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| 117 | * Lookup record for CSAM pages
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| 118 | */
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| 119 | typedef struct CSAMPAGEREC
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| 120 | {
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| 121 | /** The key is a GC virtual address. */
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| 122 | AVLPVNODECORE Core;
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| 123 | CSAMPAGE page;
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| 124 |
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| 125 | } CSAMPAGEREC, *PCSAMPAGEREC;
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| 126 |
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| 127 | /**
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| 128 | * Lookup record for patches
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| 129 | */
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| 130 | typedef struct CSAMPATCHREC
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| 131 | {
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| 132 | /** The key is a GC virtual address. */
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| 133 | AVLPVNODECORE Core;
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| 134 | CSAMPATCH patch;
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| 135 |
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| 136 | } CSAMPATCHREC, *PCSAMPATCHREC;
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| 137 |
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| 138 |
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| 139 | /**
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| 140 | * CSAM VM Instance data.
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| 141 | * Changes to this must checked against the padding of the CSAM union in VM!
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| 142 | * @note change SSM version when changing it!!
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| 143 | */
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| 144 | typedef struct CSAM
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| 145 | {
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| 146 | /** Offset to the VM structure.
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| 147 | * See CSAM2VM(). */
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| 148 | RTINT offVM;
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| 149 | #if HC_ARCH_BITS == 64
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| 150 | RTINT Alignment0; /**< Align pPageTree correctly. */
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| 151 | #endif
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| 152 |
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| 153 | R3PTRTYPE(PAVLPVNODECORE) pPageTree;
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| 154 |
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| 155 | /* Array to store previously scanned dangerous instructions, so we don't need to
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| 156 | * switch back to ring 3 each time we encounter them in GC.
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| 157 | */
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| 158 | RTRCPTR aDangerousInstr[CSAM_MAX_DANGR_INSTR];
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| 159 | uint32_t cDangerousInstr;
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| 160 | uint32_t iDangerousInstr;
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| 161 |
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| 162 | RCPTRTYPE(RTRCPTR *) pPDBitmapGC;
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| 163 | RCPTRTYPE(RTHCPTR *) pPDHCBitmapGC;
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| 164 | R3PTRTYPE(uint8_t **) pPDBitmapHC;
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| 165 | R3PTRTYPE(RTRCPTR *) pPDGCBitmapHC;
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| 166 |
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| 167 | /* Temporary storage during load/save state */
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| 168 | struct
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| 169 | {
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| 170 | R3PTRTYPE(PSSMHANDLE) pSSM;
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| 171 | uint32_t cPageRecords;
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| 172 | uint32_t cPatchPageRecords;
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| 173 | } savedstate;
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| 174 |
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| 175 | /* To keep track of dirty pages */
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| 176 | uint32_t cDirtyPages;
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| 177 | RTRCPTR pvDirtyBasePage[CSAM_MAX_DIRTY_PAGES];
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| 178 | RTRCPTR pvDirtyFaultPage[CSAM_MAX_DIRTY_PAGES];
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| 179 |
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| 180 | /* To keep track of possible code pages */
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| 181 | uint32_t cPossibleCodePages;
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| 182 | RTRCPTR pvPossibleCodePage[CSAM_MAX_CODE_PAGES_FLUSH];
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| 183 |
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| 184 | /* call addresses reported by the recompiler */
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| 185 | RTRCPTR pvCallInstruction[16];
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| 186 | uint32_t iCallInstruction;
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| 187 |
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| 188 | /** Code page write access handler type. */
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| 189 | PGMVIRTHANDLERTYPE hCodePageWriteType;
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| 190 | /** Code page write & invalidation access handler type. */
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| 191 | PGMVIRTHANDLERTYPE hCodePageWriteAndInvPgType;
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| 192 |
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| 193 | /* Set when scanning has started. */
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| 194 | bool fScanningStarted;
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| 195 |
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| 196 | /* Set when the IDT gates have been checked for the first time. */
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| 197 | bool fGatesChecked;
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| 198 | bool Alignment1[HC_ARCH_BITS == 32 ? 6 : 2]; /**< Align the stats on an 8-byte boundary. */
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| 199 |
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| 200 | STAMCOUNTER StatNrTraps;
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| 201 | STAMCOUNTER StatNrPages;
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| 202 | STAMCOUNTER StatNrPagesInv;
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| 203 | STAMCOUNTER StatNrRemovedPages;
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| 204 | STAMCOUNTER StatNrPatchPages;
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| 205 | STAMCOUNTER StatNrPageNPHC;
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| 206 | STAMCOUNTER StatNrPageNPGC;
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| 207 | STAMCOUNTER StatNrFlushes;
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| 208 | STAMCOUNTER StatNrFlushesSkipped;
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| 209 | STAMCOUNTER StatNrKnownPagesHC;
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| 210 | STAMCOUNTER StatNrKnownPagesGC;
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| 211 | STAMCOUNTER StatNrInstr;
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| 212 | STAMCOUNTER StatNrBytesRead;
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| 213 | STAMCOUNTER StatNrOpcodeRead;
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| 214 | STAMPROFILE StatTime;
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| 215 | STAMPROFILE StatTimeCheckAddr;
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| 216 | STAMPROFILE StatTimeAddrConv;
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| 217 | STAMPROFILE StatTimeFlushPage;
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| 218 | STAMPROFILE StatTimeDisasm;
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| 219 | STAMPROFILE StatFlushDirtyPages;
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| 220 | STAMPROFILE StatCheckGates;
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| 221 | STAMCOUNTER StatCodePageModified;
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| 222 | STAMCOUNTER StatDangerousWrite;
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| 223 |
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| 224 | STAMCOUNTER StatInstrCacheHit;
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| 225 | STAMCOUNTER StatInstrCacheMiss;
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| 226 |
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| 227 | STAMCOUNTER StatPagePATM;
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| 228 | STAMCOUNTER StatPageCSAM;
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| 229 | STAMCOUNTER StatPageREM;
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| 230 | STAMCOUNTER StatNrUserPages;
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| 231 | STAMCOUNTER StatPageMonitor;
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| 232 | STAMCOUNTER StatPageRemoveREMFlush;
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| 233 |
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| 234 | STAMCOUNTER StatBitmapAlloc;
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| 235 |
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| 236 | STAMCOUNTER StatScanNextFunction;
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| 237 | STAMCOUNTER StatScanNextFunctionFailed;
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| 238 | } CSAM, *PCSAM;
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| 239 |
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| 240 | /**
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| 241 | * Call for analyzing the instructions following the privileged instr. for compliance with our heuristics
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| 242 | *
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| 243 | * @returns VBox status code.
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| 244 | * @param pVM The cross context VM structure.
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| 245 | * @param pCpu CPU disassembly state
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| 246 | * @param pInstrHC Guest context pointer to privileged instruction
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| 247 | * @param pCurInstrGC Guest context pointer to current instruction
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| 248 | * @param pUserData User pointer
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| 249 | *
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| 250 | */
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| 251 | typedef int (VBOXCALL *PFN_CSAMR3ANALYSE)(PVM pVM, DISCPUSTATE *pCpu, RCPTRTYPE(uint8_t *) pInstrGC, RCPTRTYPE(uint8_t *) pCurInstrGC, PCSAMP2GLOOKUPREC pCacheRec, void *pUserData);
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| 252 |
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| 253 | /**
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| 254 | * Calculate the branch destination
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| 255 | *
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| 256 | * @returns branch destination or 0 if failed
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| 257 | * @param pCpu Disassembly state of instruction.
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| 258 | * @param pBranchInstrGC GC pointer of branch instruction
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| 259 | */
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| 260 | inline RTRCPTR CSAMResolveBranch(PDISCPUSTATE pCpu, RTRCPTR pBranchInstrGC)
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| 261 | {
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| 262 | uint32_t disp;
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| 263 | if (pCpu->Param1.fUse & DISUSE_IMMEDIATE8_REL)
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| 264 | {
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| 265 | disp = (int32_t)(char)pCpu->Param1.uValue;
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| 266 | }
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| 267 | else
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| 268 | if (pCpu->Param1.fUse & DISUSE_IMMEDIATE16_REL)
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| 269 | {
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| 270 | disp = (int32_t)(uint16_t)pCpu->Param1.uValue;
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| 271 | }
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| 272 | else
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| 273 | if (pCpu->Param1.fUse & DISUSE_IMMEDIATE32_REL)
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| 274 | {
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| 275 | disp = (int32_t)pCpu->Param1.uValue;
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| 276 | }
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| 277 | else
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| 278 | {
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| 279 | Log(("We don't support far jumps here!! (%08X)\n", pCpu->Param1.fUse));
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| 280 | return 0;
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| 281 | }
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| 282 | #ifdef IN_RC
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| 283 | return (RTRCPTR)((uint8_t *)pBranchInstrGC + pCpu->cbInstr + disp);
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| 284 | #else
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| 285 | return pBranchInstrGC + pCpu->cbInstr + disp;
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| 286 | #endif
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| 287 | }
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| 288 |
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| 289 | PGM_ALL_CB2_PROTO(FNPGMVIRTHANDLER) csamCodePageWriteHandler;
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| 290 | RT_C_DECLS_BEGIN
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| 291 | DECLEXPORT(FNPGMRCVIRTPFHANDLER) csamRCCodePageWritePfHandler;
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| 292 | RT_C_DECLS_END
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| 293 |
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| 294 | #endif /* !VMM_INCLUDED_SRC_include_CSAMInternal_h */
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