| 1 | /* $Id: CSAMInternal.h 347 2007-01-26 09:36:22Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * CSAM - Internal header file.
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2006 InnoTek Systemberatung GmbH
|
|---|
| 8 | *
|
|---|
| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 10 | * available from http://www.virtualbox.org. This file is free software;
|
|---|
| 11 | * you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 12 | * General Public License as published by the Free Software Foundation,
|
|---|
| 13 | * in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
|
|---|
| 14 | * distribution. VirtualBox OSE is distributed in the hope that it will
|
|---|
| 15 | * be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 16 | *
|
|---|
| 17 | * If you received this file as part of a commercial VirtualBox
|
|---|
| 18 | * distribution, then only the terms of your commercial VirtualBox
|
|---|
| 19 | * license agreement apply instead of the previous paragraph.
|
|---|
| 20 | */
|
|---|
| 21 |
|
|---|
| 22 | #ifndef __CSAMInternal_h__
|
|---|
| 23 | #define __CSAMInternal_h__
|
|---|
| 24 |
|
|---|
| 25 | #include <VBox/cdefs.h>
|
|---|
| 26 | #include <VBox/types.h>
|
|---|
| 27 | #include <VBox/csam.h>
|
|---|
| 28 | #include <VBox/dis.h>
|
|---|
| 29 | #include <VBox/log.h>
|
|---|
| 30 |
|
|---|
| 31 | #if !defined(IN_CSAM_R3) && !defined(IN_CSAM_R0) && !defined(IN_CSAM_GC)
|
|---|
| 32 | # error "Not in CSAM! This is an internal header!"
|
|---|
| 33 | #endif
|
|---|
| 34 |
|
|---|
| 35 | /** Page flags.
|
|---|
| 36 | * These are placed in the three bits available for system programs in
|
|---|
| 37 | * the page entries.
|
|---|
| 38 | * @{ */
|
|---|
| 39 | #ifndef PGM_PTFLAGS_CSAM_VALIDATED
|
|---|
| 40 | /** Scanned and approved by CSAM (tm). */
|
|---|
| 41 | /** NOTE: Must be identical to the one defined in PGMInternal.h!! */
|
|---|
| 42 | #define PGM_PTFLAGS_CSAM_VALIDATED BIT64(11)
|
|---|
| 43 | #endif
|
|---|
| 44 |
|
|---|
| 45 | /** @} */
|
|---|
| 46 |
|
|---|
| 47 | #define CSAM_SSM_VERSION 13
|
|---|
| 48 |
|
|---|
| 49 | #define CSAM_PGDIRBMP_CHUNKS 1024
|
|---|
| 50 |
|
|---|
| 51 | #define CSAM_PAGE_BITMAP_SIZE (PAGE_SIZE/(sizeof(uint8_t)*8))
|
|---|
| 52 |
|
|---|
| 53 | /* Maximum nr of dirty page that are cached. */
|
|---|
| 54 | #define CSAM_MAX_DIRTY_PAGES 32
|
|---|
| 55 |
|
|---|
| 56 | /* Maximum number of cached addresses of dangerous instructions that have been scanned before. */
|
|---|
| 57 | #define CSAM_MAX_DANGR_INSTR 16 /* power of two! */
|
|---|
| 58 | #define CSAM_MAX_DANGR_INSTR_MASK (CSAM_MAX_DANGR_INSTR-1)
|
|---|
| 59 |
|
|---|
| 60 |
|
|---|
| 61 | #define CSAM_MAX_CALLEXIT_RET 16
|
|---|
| 62 |
|
|---|
| 63 | /* copy from PATMInternal.h */
|
|---|
| 64 | #define SIZEOF_NEARJUMP32 5 //opcode byte + 4 byte relative offset
|
|---|
| 65 |
|
|---|
| 66 | typedef struct
|
|---|
| 67 | {
|
|---|
| 68 | RTGCPTR pInstrAfterRetGC[CSAM_MAX_CALLEXIT_RET];
|
|---|
| 69 | uint32_t cInstrAfterRet;
|
|---|
| 70 | } CSAMCALLEXITREC, *PCSAMCALLEXITREC;
|
|---|
| 71 |
|
|---|
| 72 | typedef struct
|
|---|
| 73 | {
|
|---|
| 74 | HCPTRTYPE(uint8_t *) pPageLocStartHC;
|
|---|
| 75 | HCPTRTYPE(uint8_t *) pPageLocEndHC;
|
|---|
| 76 | GCPTRTYPE(uint8_t *) pGuestLoc;
|
|---|
| 77 | uint32_t depth; //call/jump depth
|
|---|
| 78 |
|
|---|
| 79 | PCSAMCALLEXITREC pCallExitRec;
|
|---|
| 80 | } CSAMP2GLOOKUPREC, *PCSAMP2GLOOKUPREC;
|
|---|
| 81 |
|
|---|
| 82 | typedef struct
|
|---|
| 83 | {
|
|---|
| 84 | RTGCPTR pPageGC;
|
|---|
| 85 | RTGCPHYS GCPhys;
|
|---|
| 86 | uint64_t fFlags;
|
|---|
| 87 | uint32_t uSize;
|
|---|
| 88 |
|
|---|
| 89 | uint8_t *pBitmap;
|
|---|
| 90 |
|
|---|
| 91 | bool fCode32;
|
|---|
| 92 | bool fMonitorActive;
|
|---|
| 93 | bool fMonitorInvalidation;
|
|---|
| 94 |
|
|---|
| 95 | CSAMTAG enmTag;
|
|---|
| 96 |
|
|---|
| 97 | uint64_t u64Hash;
|
|---|
| 98 | } CSAMPAGE, *PCSAMPAGE;
|
|---|
| 99 |
|
|---|
| 100 | typedef struct
|
|---|
| 101 | {
|
|---|
| 102 | // GC Patch pointer
|
|---|
| 103 | RTGCPTR pInstrGC;
|
|---|
| 104 |
|
|---|
| 105 | // Disassembly state for original instruction
|
|---|
| 106 | DISCPUSTATE cpu;
|
|---|
| 107 |
|
|---|
| 108 | uint32_t uState;
|
|---|
| 109 |
|
|---|
| 110 | PCSAMPAGE pPage;
|
|---|
| 111 | } CSAMPATCH, *PCSAMPATCH;
|
|---|
| 112 |
|
|---|
| 113 | /**
|
|---|
| 114 | * Lookup record for CSAM pages
|
|---|
| 115 | */
|
|---|
| 116 | typedef struct CSAMPAGEREC
|
|---|
| 117 | {
|
|---|
| 118 | /** The key is a GC virtual address. */
|
|---|
| 119 | AVLPVNODECORE Core;
|
|---|
| 120 | CSAMPAGE page;
|
|---|
| 121 |
|
|---|
| 122 | } CSAMPAGEREC, *PCSAMPAGEREC;
|
|---|
| 123 |
|
|---|
| 124 | /**
|
|---|
| 125 | * Lookup record for patches
|
|---|
| 126 | */
|
|---|
| 127 | typedef struct CSAMPATCHREC
|
|---|
| 128 | {
|
|---|
| 129 | /** The key is a GC virtual address. */
|
|---|
| 130 | AVLPVNODECORE Core;
|
|---|
| 131 | CSAMPATCH patch;
|
|---|
| 132 |
|
|---|
| 133 | } CSAMPATCHREC, *PCSAMPATCHREC;
|
|---|
| 134 |
|
|---|
| 135 |
|
|---|
| 136 | /**
|
|---|
| 137 | * CSAM VM Instance data.
|
|---|
| 138 | * Changes to this must checked against the padding of the CSAM union in VM!
|
|---|
| 139 | * @note change SSM version when changing it!!
|
|---|
| 140 | */
|
|---|
| 141 | typedef struct CSAM
|
|---|
| 142 | {
|
|---|
| 143 | /** Offset to the VM structure.
|
|---|
| 144 | * See CSAM2VM(). */
|
|---|
| 145 | RTINT offVM;
|
|---|
| 146 |
|
|---|
| 147 | HCPTRTYPE(PAVLPVNODECORE) pPageTree;
|
|---|
| 148 |
|
|---|
| 149 | /* Array to store previously scanned dangerous instructions, so we don't need to
|
|---|
| 150 | * switch back to ring 3 each time we encounter them in GC.
|
|---|
| 151 | */
|
|---|
| 152 | RTGCPTR aDangerousInstr[CSAM_MAX_DANGR_INSTR];
|
|---|
| 153 | uint32_t cDangerousInstr;
|
|---|
| 154 | uint32_t iDangerousInstr;
|
|---|
| 155 |
|
|---|
| 156 | GCPTRTYPE(RTGCPTR *) pPDBitmapGC;
|
|---|
| 157 | GCPTRTYPE(RTHCPTR *) pPDHCBitmapGC;
|
|---|
| 158 | HCPTRTYPE(uint8_t **) pPDBitmapHC;
|
|---|
| 159 | HCPTRTYPE(RTGCPTR *) pPDGCBitmapHC;
|
|---|
| 160 |
|
|---|
| 161 | /* Temporary storage during load/save state */
|
|---|
| 162 | struct
|
|---|
| 163 | {
|
|---|
| 164 | PSSMHANDLE pSSM;
|
|---|
| 165 | uint32_t cPageRecords;
|
|---|
| 166 | uint32_t cPatchPageRecords;
|
|---|
| 167 | } savedstate;
|
|---|
| 168 |
|
|---|
| 169 | /* To keep track of dirty pages */
|
|---|
| 170 | uint32_t cDirtyPages;
|
|---|
| 171 | RTGCPTR pvDirtyBasePage[CSAM_MAX_DIRTY_PAGES];
|
|---|
| 172 | RTGCPTR pvDirtyFaultPage[CSAM_MAX_DIRTY_PAGES];
|
|---|
| 173 |
|
|---|
| 174 | /* Set when scanning has started. */
|
|---|
| 175 | bool fScanningStarted;
|
|---|
| 176 |
|
|---|
| 177 | /* Set when the IDT gates have been checked for the first time. */
|
|---|
| 178 | bool fGatesChecked;
|
|---|
| 179 |
|
|---|
| 180 | STAMCOUNTER StatNrTraps;
|
|---|
| 181 | STAMCOUNTER StatNrPages;
|
|---|
| 182 | STAMCOUNTER StatNrPagesInv;
|
|---|
| 183 | STAMCOUNTER StatNrRemovedPages;
|
|---|
| 184 | STAMCOUNTER StatNrPatchPages;
|
|---|
| 185 | STAMCOUNTER StatNrPageNPHC;
|
|---|
| 186 | STAMCOUNTER StatNrPageNPGC;
|
|---|
| 187 | STAMCOUNTER StatNrFlushes;
|
|---|
| 188 | STAMCOUNTER StatNrFlushesSkipped;
|
|---|
| 189 | STAMCOUNTER StatNrKnownPagesHC;
|
|---|
| 190 | STAMCOUNTER StatNrKnownPagesGC;
|
|---|
| 191 | STAMCOUNTER StatNrInstr;
|
|---|
| 192 | STAMCOUNTER StatNrBytesRead;
|
|---|
| 193 | STAMCOUNTER StatNrOpcodeRead;
|
|---|
| 194 | STAMPROFILE StatTime;
|
|---|
| 195 | STAMPROFILE StatTimeCheckAddr;
|
|---|
| 196 | STAMPROFILE StatTimeAddrConv;
|
|---|
| 197 | STAMPROFILE StatTimeFlushPage;
|
|---|
| 198 | STAMPROFILE StatTimeDisasm;
|
|---|
| 199 | STAMPROFILE StatFlushDirtyPages;
|
|---|
| 200 | STAMPROFILE StatCheckGates;
|
|---|
| 201 | STAMCOUNTER StatCodePageModified;
|
|---|
| 202 | STAMCOUNTER StatDangerousWrite;
|
|---|
| 203 |
|
|---|
| 204 | STAMCOUNTER StatInstrCacheHit;
|
|---|
| 205 | STAMCOUNTER StatInstrCacheMiss;
|
|---|
| 206 |
|
|---|
| 207 | STAMCOUNTER StatPagePATM;
|
|---|
| 208 | STAMCOUNTER StatPageCSAM;
|
|---|
| 209 | STAMCOUNTER StatPageREM;
|
|---|
| 210 | STAMCOUNTER StatNrUserPages;
|
|---|
| 211 | STAMCOUNTER StatPageMonitor;
|
|---|
| 212 | STAMCOUNTER StatPageRemoveREMFlush;
|
|---|
| 213 |
|
|---|
| 214 | STAMCOUNTER StatBitmapAlloc;
|
|---|
| 215 |
|
|---|
| 216 | STAMCOUNTER StatScanNextFunction;
|
|---|
| 217 | STAMCOUNTER StatScanNextFunctionFailed;
|
|---|
| 218 | } CSAM, *PCSAM;
|
|---|
| 219 |
|
|---|
| 220 | /**
|
|---|
| 221 | * Call for analyzing the instructions following the privileged instr. for compliance with our heuristics
|
|---|
| 222 | *
|
|---|
| 223 | * @returns VBox status code.
|
|---|
| 224 | * @param pVM The VM to operate on.
|
|---|
| 225 | * @param pCpu CPU disassembly state
|
|---|
| 226 | * @param pInstrHC Guest context pointer to privileged instruction
|
|---|
| 227 | * @param pCurInstrGC Guest context pointer to current instruction
|
|---|
| 228 | * @param pUserData User pointer
|
|---|
| 229 | *
|
|---|
| 230 | */
|
|---|
| 231 | typedef int (VBOXCALL *PFN_CSAMR3ANALYSE)(PVM pVM, DISCPUSTATE *pCpu, GCPTRTYPE(uint8_t *) pInstrGC, GCPTRTYPE(uint8_t *) pCurInstrGC, PCSAMP2GLOOKUPREC pCacheRec, void *pUserData);
|
|---|
| 232 |
|
|---|
| 233 | /**
|
|---|
| 234 | * Check if the current instruction is the start of a known guest block that requires our attention
|
|---|
| 235 | *
|
|---|
| 236 | * @param pVM The VM to operate on.
|
|---|
| 237 | * @param pInstrGC Guest context pointer of instruction to check
|
|---|
| 238 | * @param pInstrHC Host context pointer of instruction to check
|
|---|
| 239 | * @param opcode Opcode of instruction at pInstrGC
|
|---|
| 240 | *
|
|---|
| 241 | * @returns true if patched
|
|---|
| 242 | *
|
|---|
| 243 | */
|
|---|
| 244 | bool csamCheckGuestSpecificPatch(PVM pVM, RTGCPTR pInstrGC, HCPTRTYPE(uint8_t *)pInstrHC, uint32_t opcode);
|
|---|
| 245 |
|
|---|
| 246 | /**
|
|---|
| 247 | * Calculate the branch destination
|
|---|
| 248 | *
|
|---|
| 249 | * @returns branch destination or 0 if failed
|
|---|
| 250 | * @param pCpu Disassembly state of instruction.
|
|---|
| 251 | * @param pBranchInstrGC GC pointer of branch instruction
|
|---|
| 252 | */
|
|---|
| 253 | inline RTGCPTR CSAMResolveBranch(PDISCPUSTATE pCpu, RTGCPTR pBranchInstrGC)
|
|---|
| 254 | {
|
|---|
| 255 | uint32_t disp;
|
|---|
| 256 | if (pCpu->param1.flags & USE_IMMEDIATE8_REL)
|
|---|
| 257 | {
|
|---|
| 258 | disp = (int32_t)(char)pCpu->param1.parval;
|
|---|
| 259 | }
|
|---|
| 260 | else
|
|---|
| 261 | if (pCpu->param1.flags & USE_IMMEDIATE16_REL)
|
|---|
| 262 | {
|
|---|
| 263 | disp = (int32_t)(uint16_t)pCpu->param1.parval;
|
|---|
| 264 | }
|
|---|
| 265 | else
|
|---|
| 266 | if (pCpu->param1.flags & USE_IMMEDIATE32_REL)
|
|---|
| 267 | {
|
|---|
| 268 | disp = (int32_t)pCpu->param1.parval;
|
|---|
| 269 | }
|
|---|
| 270 | else
|
|---|
| 271 | {
|
|---|
| 272 | Log(("We don't support far jumps here!! (%08X)\n", pCpu->param1.flags));
|
|---|
| 273 | return 0;
|
|---|
| 274 | }
|
|---|
| 275 | #ifdef IN_GC
|
|---|
| 276 | return (RTGCPTR)((uint8_t *)pBranchInstrGC + pCpu->opsize + disp);
|
|---|
| 277 | #else
|
|---|
| 278 | return pBranchInstrGC + pCpu->opsize + disp;
|
|---|
| 279 | #endif
|
|---|
| 280 | }
|
|---|
| 281 |
|
|---|
| 282 | __BEGIN_DECLS
|
|---|
| 283 | CSAMGCDECL(int) CSAMGCCodePageWriteHandler(PVM pVM, RTGCUINT uErrorCode, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, RTGCPTR pvRange, uintptr_t offRange);
|
|---|
| 284 | __END_DECLS
|
|---|
| 285 |
|
|---|
| 286 | #endif
|
|---|
