[23] | 1 | /* $Id: PATMPatch.cpp 76553 2019-01-01 01:45:53Z vboxsync $ */
|
---|
[1] | 2 | /** @file
|
---|
| 3 | * PATMPatch - Dynamic Guest OS Instruction patches
|
---|
| 4 | *
|
---|
| 5 | * NOTE: CSAM assumes patch memory is never reused!!
|
---|
| 6 | */
|
---|
| 7 |
|
---|
| 8 | /*
|
---|
[76553] | 9 | * Copyright (C) 2006-2019 Oracle Corporation
|
---|
[1] | 10 | *
|
---|
| 11 | * This file is part of VirtualBox Open Source Edition (OSE), as
|
---|
| 12 | * available from http://www.virtualbox.org. This file is free software;
|
---|
| 13 | * you can redistribute it and/or modify it under the terms of the GNU
|
---|
[5999] | 14 | * General Public License (GPL) as published by the Free Software
|
---|
| 15 | * Foundation, in version 2 as it comes in the "COPYING" file of the
|
---|
| 16 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
|
---|
| 17 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
|
---|
[1] | 18 | */
|
---|
| 19 |
|
---|
[57358] | 20 |
|
---|
| 21 | /*********************************************************************************************************************************
|
---|
| 22 | * Header Files *
|
---|
| 23 | *********************************************************************************************************************************/
|
---|
[1] | 24 | #define LOG_GROUP LOG_GROUP_PATM
|
---|
[35346] | 25 | #include <VBox/vmm/patm.h>
|
---|
[54763] | 26 | #include <VBox/vmm/pdmapi.h>
|
---|
[35346] | 27 | #include <VBox/vmm/pgm.h>
|
---|
| 28 | #include <VBox/vmm/cpum.h>
|
---|
| 29 | #include <VBox/vmm/mm.h>
|
---|
[45276] | 30 | #include <VBox/vmm/em.h>
|
---|
[35346] | 31 | #include <VBox/vmm/trpm.h>
|
---|
[46150] | 32 | #include <VBox/vmm/csam.h>
|
---|
[1] | 33 | #include "PATMInternal.h"
|
---|
[35346] | 34 | #include <VBox/vmm/vm.h>
|
---|
[46150] | 35 | #include <VBox/param.h>
|
---|
[1] | 36 |
|
---|
| 37 | #include <VBox/err.h>
|
---|
| 38 | #include <VBox/log.h>
|
---|
[46150] | 39 | #include <VBox/dis.h>
|
---|
| 40 | #include <VBox/disopcode.h>
|
---|
| 41 |
|
---|
[1] | 42 | #include <iprt/assert.h>
|
---|
| 43 | #include <iprt/asm.h>
|
---|
[23] | 44 | #include <iprt/string.h>
|
---|
[1] | 45 |
|
---|
| 46 | #include "PATMA.h"
|
---|
| 47 | #include "PATMPatch.h"
|
---|
| 48 |
|
---|
[54688] | 49 |
|
---|
[57358] | 50 | /*********************************************************************************************************************************
|
---|
| 51 | * Structures and Typedefs *
|
---|
| 52 | *********************************************************************************************************************************/
|
---|
[54688] | 53 | /**
|
---|
| 54 | * Internal structure for passing more information about call fixups to
|
---|
| 55 | * patmPatchGenCode.
|
---|
| 56 | */
|
---|
[1] | 57 | typedef struct
|
---|
| 58 | {
|
---|
[9228] | 59 | RTRCPTR pTargetGC;
|
---|
| 60 | RTRCPTR pCurInstrGC;
|
---|
| 61 | RTRCPTR pNextInstrGC;
|
---|
| 62 | RTRCPTR pReturnGC;
|
---|
[1] | 63 | } PATMCALLINFO, *PPATMCALLINFO;
|
---|
| 64 |
|
---|
[54688] | 65 |
|
---|
[57358] | 66 | /*********************************************************************************************************************************
|
---|
| 67 | * Defined Constants And Macros *
|
---|
| 68 | *********************************************************************************************************************************/
|
---|
[54746] | 69 | /** Value to use when not sure about the patch size. */
|
---|
| 70 | #define PATCHGEN_DEF_SIZE 256
|
---|
| 71 |
|
---|
| 72 | #define PATCHGEN_PROLOG_NODEF(pVM, pPatch, a_cbMaxEmit) \
|
---|
[54688] | 73 | do { \
|
---|
[54746] | 74 | cbGivenPatchSize = (a_cbMaxEmit) + 16U /*jmp++*/; \
|
---|
| 75 | if (RT_LIKELY((pPatch)->pPatchBlockOffset + pPatch->uCurPatchOffset + cbGivenPatchSize < pVM->patm.s.cbPatchMem)) \
|
---|
| 76 | pPB = PATCHCODE_PTR_HC(pPatch) + pPatch->uCurPatchOffset; \
|
---|
| 77 | else \
|
---|
[54688] | 78 | { \
|
---|
| 79 | pVM->patm.s.fOutOfMemory = true; \
|
---|
[54746] | 80 | AssertMsgFailed(("offPatch=%#x + offEmit=%#x + a_cbMaxEmit=%#x + jmp --> cbTotalWithFudge=%#x >= cbPatchMem=%#x", \
|
---|
| 81 | (pPatch)->pPatchBlockOffset, pPatch->uCurPatchOffset, a_cbMaxEmit, \
|
---|
| 82 | (pPatch)->pPatchBlockOffset + pPatch->uCurPatchOffset + cbGivenPatchSize, pVM->patm.s.cbPatchMem)); \
|
---|
[54688] | 83 | return VERR_NO_MEMORY; \
|
---|
| 84 | } \
|
---|
| 85 | } while (0)
|
---|
| 86 |
|
---|
[54746] | 87 | #define PATCHGEN_PROLOG(pVM, pPatch, a_cbMaxEmit) \
|
---|
[54688] | 88 | uint8_t *pPB; \
|
---|
[54746] | 89 | uint32_t cbGivenPatchSize; \
|
---|
| 90 | PATCHGEN_PROLOG_NODEF(pVM, pPatch, a_cbMaxEmit)
|
---|
[54688] | 91 |
|
---|
[54746] | 92 | #define PATCHGEN_EPILOG(pPatch, a_cbActual) \
|
---|
[54688] | 93 | do { \
|
---|
[54746] | 94 | AssertMsg((a_cbActual) <= cbGivenPatchSize, ("a_cbActual=%#x cbGivenPatchSize=%#x\n", a_cbActual, cbGivenPatchSize)); \
|
---|
| 95 | Assert((a_cbActual) <= 640); \
|
---|
| 96 | pPatch->uCurPatchOffset += (a_cbActual); \
|
---|
[54688] | 97 | } while (0)
|
---|
| 98 |
|
---|
| 99 |
|
---|
| 100 |
|
---|
| 101 |
|
---|
| 102 | int patmPatchAddReloc32(PVM pVM, PPATCHINFO pPatch, uint8_t *pRelocHC, uint32_t uType,
|
---|
| 103 | RTRCPTR pSource /*= 0*/, RTRCPTR pDest /*= 0*/)
|
---|
[1] | 104 | {
|
---|
| 105 | PRELOCREC pRec;
|
---|
| 106 |
|
---|
[54714] | 107 | Assert( uType == FIXUP_ABSOLUTE
|
---|
[54763] | 108 | || ( ( uType == FIXUP_ABSOLUTE_IN_PATCH_ASM_TMPL
|
---|
| 109 | || uType == FIXUP_CONSTANT_IN_PATCH_ASM_TMPL
|
---|
| 110 | || uType == FIXUP_REL_HELPER_IN_PATCH_ASM_TMPL)
|
---|
[54762] | 111 | && pSource == pDest
|
---|
[54764] | 112 | && PATM_IS_ASMFIX(pSource))
|
---|
[54714] | 113 | || ((uType == FIXUP_REL_JMPTOPATCH || uType == FIXUP_REL_JMPTOGUEST) && pSource && pDest));
|
---|
[1] | 114 |
|
---|
[13822] | 115 | LogFlow(("patmPatchAddReloc32 type=%d pRelocGC=%RRv source=%RRv dest=%RRv\n", uType, pRelocHC - pVM->patm.s.pPatchMemGC + pVM->patm.s.pPatchMemGC , pSource, pDest));
|
---|
[1] | 116 |
|
---|
| 117 | pRec = (PRELOCREC)MMR3HeapAllocZ(pVM, MM_TAG_PATM_PATCH, sizeof(*pRec));
|
---|
| 118 | Assert(pRec);
|
---|
| 119 | pRec->Core.Key = (AVLPVKEY)pRelocHC;
|
---|
[63560] | 120 | pRec->pRelocPos = pRelocHC; /** @todo redundant. */
|
---|
[1] | 121 | pRec->pSource = pSource;
|
---|
| 122 | pRec->pDest = pDest;
|
---|
| 123 | pRec->uType = uType;
|
---|
| 124 |
|
---|
| 125 | bool ret = RTAvlPVInsert(&pPatch->FixupTree, &pRec->Core);
|
---|
| 126 | Assert(ret); NOREF(ret);
|
---|
| 127 | pPatch->nrFixups++;
|
---|
| 128 |
|
---|
| 129 | return VINF_SUCCESS;
|
---|
| 130 | }
|
---|
| 131 |
|
---|
[9228] | 132 | int patmPatchAddJump(PVM pVM, PPATCHINFO pPatch, uint8_t *pJumpHC, uint32_t offset, RTRCPTR pTargetGC, uint32_t opcode)
|
---|
[1] | 133 | {
|
---|
| 134 | PJUMPREC pRec;
|
---|
| 135 |
|
---|
| 136 | pRec = (PJUMPREC)MMR3HeapAllocZ(pVM, MM_TAG_PATM_PATCH, sizeof(*pRec));
|
---|
| 137 | Assert(pRec);
|
---|
| 138 |
|
---|
| 139 | pRec->Core.Key = (AVLPVKEY)pJumpHC;
|
---|
[63560] | 140 | pRec->pJumpHC = pJumpHC; /** @todo redundant. */
|
---|
[1] | 141 | pRec->offDispl = offset;
|
---|
| 142 | pRec->pTargetGC = pTargetGC;
|
---|
| 143 | pRec->opcode = opcode;
|
---|
| 144 |
|
---|
| 145 | bool ret = RTAvlPVInsert(&pPatch->JumpTree, &pRec->Core);
|
---|
| 146 | Assert(ret); NOREF(ret);
|
---|
| 147 | pPatch->nrJumpRecs++;
|
---|
| 148 |
|
---|
| 149 | return VINF_SUCCESS;
|
---|
| 150 | }
|
---|
| 151 |
|
---|
[54686] | 152 | static uint32_t patmPatchGenCode(PVM pVM, PPATCHINFO pPatch, uint8_t *pPB, PCPATCHASMRECORD pAsmRecord,
|
---|
| 153 | RCPTRTYPE(uint8_t *) pReturnAddrGC, bool fGenJump,
|
---|
[1] | 154 | PPATMCALLINFO pCallInfo = 0)
|
---|
| 155 | {
|
---|
| 156 | Assert(fGenJump == false || pReturnAddrGC);
|
---|
| 157 | Assert(fGenJump == false || pAsmRecord->offJump);
|
---|
[54686] | 158 | Assert(pAsmRecord);
|
---|
| 159 | Assert(pAsmRecord->cbFunction > sizeof(pAsmRecord->aRelocs[0].uType) * pAsmRecord->cRelocs);
|
---|
[1] | 160 |
|
---|
| 161 | // Copy the code block
|
---|
[54686] | 162 | memcpy(pPB, pAsmRecord->pbFunction, pAsmRecord->cbFunction);
|
---|
[1] | 163 |
|
---|
| 164 | // Process all fixups
|
---|
[54686] | 165 | uint32_t i, j;
|
---|
| 166 | for (j = 0, i = 0; i < pAsmRecord->cRelocs; i++)
|
---|
[1] | 167 | {
|
---|
[54686] | 168 | for (; j < pAsmRecord->cbFunction; j++)
|
---|
[1] | 169 | {
|
---|
[54686] | 170 | if (*(uint32_t*)&pPB[j] == pAsmRecord->aRelocs[i].uType)
|
---|
[1] | 171 | {
|
---|
[9212] | 172 | RCPTRTYPE(uint32_t *) dest;
|
---|
[1] | 173 |
|
---|
| 174 | #ifdef VBOX_STRICT
|
---|
[54764] | 175 | if (pAsmRecord->aRelocs[i].uType == PATM_ASMFIX_FIXUP)
|
---|
[54686] | 176 | Assert(pAsmRecord->aRelocs[i].uInfo != 0);
|
---|
[1] | 177 | else
|
---|
[54686] | 178 | Assert(pAsmRecord->aRelocs[i].uInfo == 0);
|
---|
[1] | 179 | #endif
|
---|
| 180 |
|
---|
[54714] | 181 | /*
|
---|
| 182 | * BE VERY CAREFUL WITH THESE FIXUPS. TAKE INTO ACCOUNT THAT PROBLEMS MAY ARISE WHEN RESTORING
|
---|
| 183 | * A SAVED STATE WITH A DIFFERENT HYPERVISOR LAYOUT.
|
---|
[11979] | 184 | */
|
---|
[54761] | 185 | uint32_t uRelocType = FIXUP_ABSOLUTE_IN_PATCH_ASM_TMPL;
|
---|
[54686] | 186 | switch (pAsmRecord->aRelocs[i].uType)
|
---|
[1] | 187 | {
|
---|
[54714] | 188 | /*
|
---|
| 189 | * PATMGCSTATE member fixups.
|
---|
| 190 | */
|
---|
[54764] | 191 | case PATM_ASMFIX_VMFLAGS:
|
---|
[54714] | 192 | dest = pVM->patm.s.pGCStateGC + RT_OFFSETOF(PATMGCSTATE, uVMFlags);
|
---|
| 193 | break;
|
---|
[54764] | 194 | case PATM_ASMFIX_PENDINGACTION:
|
---|
[54714] | 195 | dest = pVM->patm.s.pGCStateGC + RT_OFFSETOF(PATMGCSTATE, uPendingAction);
|
---|
| 196 | break;
|
---|
[54764] | 197 | case PATM_ASMFIX_STACKPTR:
|
---|
[54714] | 198 | dest = pVM->patm.s.pGCStateGC + RT_OFFSETOF(PATMGCSTATE, Psp);
|
---|
| 199 | break;
|
---|
[54764] | 200 | case PATM_ASMFIX_INTERRUPTFLAG:
|
---|
[54714] | 201 | dest = pVM->patm.s.pGCStateGC + RT_OFFSETOF(PATMGCSTATE, fPIF);
|
---|
| 202 | break;
|
---|
[54764] | 203 | case PATM_ASMFIX_INHIBITIRQADDR:
|
---|
[54714] | 204 | dest = pVM->patm.s.pGCStateGC + RT_OFFSETOF(PATMGCSTATE, GCPtrInhibitInterrupts);
|
---|
| 205 | break;
|
---|
[54764] | 206 | case PATM_ASMFIX_TEMP_EAX:
|
---|
[54714] | 207 | dest = pVM->patm.s.pGCStateGC + RT_OFFSETOF(PATMGCSTATE, Restore.uEAX);
|
---|
| 208 | break;
|
---|
[54764] | 209 | case PATM_ASMFIX_TEMP_ECX:
|
---|
[54714] | 210 | dest = pVM->patm.s.pGCStateGC + RT_OFFSETOF(PATMGCSTATE, Restore.uECX);
|
---|
| 211 | break;
|
---|
[54764] | 212 | case PATM_ASMFIX_TEMP_EDI:
|
---|
[54714] | 213 | dest = pVM->patm.s.pGCStateGC + RT_OFFSETOF(PATMGCSTATE, Restore.uEDI);
|
---|
| 214 | break;
|
---|
[54764] | 215 | case PATM_ASMFIX_TEMP_EFLAGS:
|
---|
[54714] | 216 | dest = pVM->patm.s.pGCStateGC + RT_OFFSETOF(PATMGCSTATE, Restore.eFlags);
|
---|
| 217 | break;
|
---|
[54764] | 218 | case PATM_ASMFIX_TEMP_RESTORE_FLAGS:
|
---|
[54714] | 219 | dest = pVM->patm.s.pGCStateGC + RT_OFFSETOF(PATMGCSTATE, Restore.uFlags);
|
---|
| 220 | break;
|
---|
[54764] | 221 | case PATM_ASMFIX_CALL_PATCH_TARGET_ADDR:
|
---|
[54714] | 222 | dest = pVM->patm.s.pGCStateGC + RT_OFFSETOF(PATMGCSTATE, GCCallPatchTargetAddr);
|
---|
| 223 | break;
|
---|
[54764] | 224 | case PATM_ASMFIX_CALL_RETURN_ADDR:
|
---|
[54714] | 225 | dest = pVM->patm.s.pGCStateGC + RT_OFFSETOF(PATMGCSTATE, GCCallReturnAddr);
|
---|
| 226 | break;
|
---|
[1] | 227 | #ifdef VBOX_WITH_STATISTICS
|
---|
[54764] | 228 | case PATM_ASMFIX_ALLPATCHCALLS:
|
---|
[54714] | 229 | dest = pVM->patm.s.pGCStateGC + RT_OFFSETOF(PATMGCSTATE, uPatchCalls);
|
---|
| 230 | break;
|
---|
[54764] | 231 | case PATM_ASMFIX_IRETEFLAGS:
|
---|
[54714] | 232 | dest = pVM->patm.s.pGCStateGC + RT_OFFSETOF(PATMGCSTATE, uIretEFlags);
|
---|
| 233 | break;
|
---|
[54764] | 234 | case PATM_ASMFIX_IRETCS:
|
---|
[54714] | 235 | dest = pVM->patm.s.pGCStateGC + RT_OFFSETOF(PATMGCSTATE, uIretCS);
|
---|
| 236 | break;
|
---|
[54764] | 237 | case PATM_ASMFIX_IRETEIP:
|
---|
[54714] | 238 | dest = pVM->patm.s.pGCStateGC + RT_OFFSETOF(PATMGCSTATE, uIretEIP);
|
---|
| 239 | break;
|
---|
| 240 | #endif
|
---|
[1] | 241 |
|
---|
| 242 |
|
---|
[54764] | 243 | case PATM_ASMFIX_FIXUP:
|
---|
[54714] | 244 | /* Offset in aRelocs[i].uInfo is from the base of the function. */
|
---|
| 245 | dest = (RTGCUINTPTR32)pVM->patm.s.pPatchMemGC + pAsmRecord->aRelocs[i].uInfo
|
---|
| 246 | + (RTGCUINTPTR32)(pPB - pVM->patm.s.pPatchMemHC);
|
---|
| 247 | break;
|
---|
[1] | 248 |
|
---|
[54714] | 249 | #ifdef VBOX_WITH_STATISTICS
|
---|
[54764] | 250 | case PATM_ASMFIX_PERPATCHCALLS:
|
---|
[54714] | 251 | dest = patmPatchQueryStatAddress(pVM, pPatch);
|
---|
| 252 | break;
|
---|
[1] | 253 | #endif
|
---|
| 254 |
|
---|
[54714] | 255 | /* The first part of our PATM stack is used to store offsets of patch return addresses; the 2nd
|
---|
| 256 | * part to store the original return addresses.
|
---|
| 257 | */
|
---|
[54764] | 258 | case PATM_ASMFIX_STACKBASE:
|
---|
[54714] | 259 | dest = pVM->patm.s.pGCStackGC;
|
---|
| 260 | break;
|
---|
[1] | 261 |
|
---|
[54764] | 262 | case PATM_ASMFIX_STACKBASE_GUEST:
|
---|
[54714] | 263 | dest = pVM->patm.s.pGCStackGC + PATM_STACK_SIZE;
|
---|
| 264 | break;
|
---|
[1] | 265 |
|
---|
[54764] | 266 | case PATM_ASMFIX_RETURNADDR: /* absolute guest address; no fixup required */
|
---|
| 267 | Assert(pCallInfo && pAsmRecord->aRelocs[i].uType >= PATM_ASMFIX_NO_FIXUP);
|
---|
[54714] | 268 | dest = pCallInfo->pReturnGC;
|
---|
| 269 | break;
|
---|
[1] | 270 |
|
---|
[54764] | 271 | case PATM_ASMFIX_PATCHNEXTBLOCK: /* relative address of instruction following this block */
|
---|
| 272 | Assert(pCallInfo && pAsmRecord->aRelocs[i].uType >= PATM_ASMFIX_NO_FIXUP);
|
---|
[1] | 273 |
|
---|
[54714] | 274 | /** @note hardcoded assumption that we must return to the instruction following this block */
|
---|
| 275 | dest = (uintptr_t)pPB - (uintptr_t)pVM->patm.s.pPatchMemHC + pAsmRecord->cbFunction;
|
---|
| 276 | break;
|
---|
[1] | 277 |
|
---|
[54764] | 278 | case PATM_ASMFIX_CALLTARGET: /* relative to patch address; no fixup required */
|
---|
| 279 | Assert(pCallInfo && pAsmRecord->aRelocs[i].uType >= PATM_ASMFIX_NO_FIXUP);
|
---|
[1] | 280 |
|
---|
[54714] | 281 | /* Address must be filled in later. (see patmr3SetBranchTargets) */
|
---|
| 282 | patmPatchAddJump(pVM, pPatch, &pPB[j-1], 1, pCallInfo->pTargetGC, OP_CALL);
|
---|
| 283 | dest = PATM_ILLEGAL_DESTINATION;
|
---|
| 284 | break;
|
---|
[1] | 285 |
|
---|
[54764] | 286 | case PATM_ASMFIX_PATCHBASE: /* Patch GC base address */
|
---|
[54714] | 287 | dest = pVM->patm.s.pPatchMemGC;
|
---|
| 288 | break;
|
---|
[1] | 289 |
|
---|
[54764] | 290 | case PATM_ASMFIX_NEXTINSTRADDR:
|
---|
[54714] | 291 | Assert(pCallInfo);
|
---|
| 292 | /* pNextInstrGC can be 0 if several instructions, that inhibit irqs, follow each other */
|
---|
| 293 | dest = pCallInfo->pNextInstrGC;
|
---|
| 294 | break;
|
---|
[1] | 295 |
|
---|
[54764] | 296 | case PATM_ASMFIX_CURINSTRADDR:
|
---|
[54714] | 297 | Assert(pCallInfo);
|
---|
| 298 | dest = pCallInfo->pCurInstrGC;
|
---|
| 299 | break;
|
---|
[1] | 300 |
|
---|
[54714] | 301 | /* Relative address of global patm lookup and call function. */
|
---|
[54764] | 302 | case PATM_ASMFIX_LOOKUP_AND_CALL_FUNCTION:
|
---|
[54714] | 303 | {
|
---|
| 304 | RTRCPTR pInstrAfterCall = pVM->patm.s.pPatchMemGC
|
---|
| 305 | + (RTGCUINTPTR32)(&pPB[j] + sizeof(RTRCPTR) - pVM->patm.s.pPatchMemHC);
|
---|
| 306 | Assert(pVM->patm.s.pfnHelperCallGC);
|
---|
| 307 | Assert(sizeof(uint32_t) == sizeof(RTRCPTR));
|
---|
[5285] | 308 |
|
---|
[54714] | 309 | /* Relative value is target minus address of instruction after the actual call instruction. */
|
---|
| 310 | dest = pVM->patm.s.pfnHelperCallGC - pInstrAfterCall;
|
---|
| 311 | break;
|
---|
| 312 | }
|
---|
[1] | 313 |
|
---|
[54764] | 314 | case PATM_ASMFIX_RETURN_FUNCTION:
|
---|
[54714] | 315 | {
|
---|
| 316 | RTRCPTR pInstrAfterCall = pVM->patm.s.pPatchMemGC
|
---|
| 317 | + (RTGCUINTPTR32)(&pPB[j] + sizeof(RTRCPTR) - pVM->patm.s.pPatchMemHC);
|
---|
| 318 | Assert(pVM->patm.s.pfnHelperRetGC);
|
---|
| 319 | Assert(sizeof(uint32_t) == sizeof(RTRCPTR));
|
---|
[1] | 320 |
|
---|
[54714] | 321 | /* Relative value is target minus address of instruction after the actual call instruction. */
|
---|
| 322 | dest = pVM->patm.s.pfnHelperRetGC - pInstrAfterCall;
|
---|
| 323 | break;
|
---|
| 324 | }
|
---|
[1] | 325 |
|
---|
[54764] | 326 | case PATM_ASMFIX_IRET_FUNCTION:
|
---|
[54714] | 327 | {
|
---|
| 328 | RTRCPTR pInstrAfterCall = pVM->patm.s.pPatchMemGC
|
---|
| 329 | + (RTGCUINTPTR32)(&pPB[j] + sizeof(RTRCPTR) - pVM->patm.s.pPatchMemHC);
|
---|
| 330 | Assert(pVM->patm.s.pfnHelperIretGC);
|
---|
| 331 | Assert(sizeof(uint32_t) == sizeof(RTRCPTR));
|
---|
[5285] | 332 |
|
---|
[54714] | 333 | /* Relative value is target minus address of instruction after the actual call instruction. */
|
---|
| 334 | dest = pVM->patm.s.pfnHelperIretGC - pInstrAfterCall;
|
---|
| 335 | break;
|
---|
| 336 | }
|
---|
[1] | 337 |
|
---|
[54764] | 338 | case PATM_ASMFIX_LOOKUP_AND_JUMP_FUNCTION:
|
---|
[54714] | 339 | {
|
---|
| 340 | RTRCPTR pInstrAfterCall = pVM->patm.s.pPatchMemGC
|
---|
| 341 | + (RTGCUINTPTR32)(&pPB[j] + sizeof(RTRCPTR) - pVM->patm.s.pPatchMemHC);
|
---|
| 342 | Assert(pVM->patm.s.pfnHelperJumpGC);
|
---|
| 343 | Assert(sizeof(uint32_t) == sizeof(RTRCPTR));
|
---|
[1] | 344 |
|
---|
[54714] | 345 | /* Relative value is target minus address of instruction after the actual call instruction. */
|
---|
| 346 | dest = pVM->patm.s.pfnHelperJumpGC - pInstrAfterCall;
|
---|
| 347 | break;
|
---|
| 348 | }
|
---|
[1] | 349 |
|
---|
[54764] | 350 | case PATM_ASMFIX_CPUID_STD_MAX: /* saved state only */
|
---|
[54714] | 351 | dest = CPUMR3GetGuestCpuIdPatmStdMax(pVM);
|
---|
| 352 | break;
|
---|
[54764] | 353 | case PATM_ASMFIX_CPUID_EXT_MAX: /* saved state only */
|
---|
[54714] | 354 | dest = CPUMR3GetGuestCpuIdPatmExtMax(pVM);
|
---|
| 355 | break;
|
---|
[54764] | 356 | case PATM_ASMFIX_CPUID_CENTAUR_MAX: /* saved state only */
|
---|
[54714] | 357 | dest = CPUMR3GetGuestCpuIdPatmCentaurMax(pVM);
|
---|
| 358 | break;
|
---|
[1] | 359 |
|
---|
[54714] | 360 | /*
|
---|
| 361 | * The following fixups needs to be recalculated when loading saved state
|
---|
[54761] | 362 | * Note! Earlier saved state versions had different hacks for detecting some of these.
|
---|
[54714] | 363 | */
|
---|
[54764] | 364 | case PATM_ASMFIX_VM_FORCEDACTIONS:
|
---|
[54714] | 365 | dest = pVM->pVMRC + RT_OFFSETOF(VM, aCpus[0].fLocalForcedActions);
|
---|
| 366 | break;
|
---|
[54763] | 367 |
|
---|
[54764] | 368 | case PATM_ASMFIX_CPUID_DEF_PTR: /* saved state only */
|
---|
[54714] | 369 | dest = CPUMR3GetGuestCpuIdPatmDefRCPtr(pVM);
|
---|
| 370 | break;
|
---|
[54764] | 371 | case PATM_ASMFIX_CPUID_STD_PTR: /* saved state only */
|
---|
[54714] | 372 | dest = CPUMR3GetGuestCpuIdPatmStdRCPtr(pVM);
|
---|
| 373 | break;
|
---|
[54764] | 374 | case PATM_ASMFIX_CPUID_EXT_PTR: /* saved state only */
|
---|
[54714] | 375 | dest = CPUMR3GetGuestCpuIdPatmExtRCPtr(pVM);
|
---|
| 376 | break;
|
---|
[54764] | 377 | case PATM_ASMFIX_CPUID_CENTAUR_PTR: /* saved state only */
|
---|
[54714] | 378 | dest = CPUMR3GetGuestCpuIdPatmCentaurRCPtr(pVM);
|
---|
| 379 | break;
|
---|
[1] | 380 |
|
---|
[54761] | 381 | /*
|
---|
[54763] | 382 | * The following fixups are constants and helper code calls that only
|
---|
| 383 | * needs to be corrected when loading saved state.
|
---|
[54761] | 384 | */
|
---|
[54763] | 385 | case PATM_ASMFIX_HELPER_CPUM_CPUID:
|
---|
| 386 | {
|
---|
| 387 | int rc = PDMR3LdrGetSymbolRC(pVM, NULL, "CPUMPatchHlpCpuId", &dest);
|
---|
| 388 | AssertReleaseRCBreakStmt(rc, dest = PATM_ILLEGAL_DESTINATION);
|
---|
| 389 | uRelocType = FIXUP_REL_HELPER_IN_PATCH_ASM_TMPL;
|
---|
[54761] | 390 | break;
|
---|
[54763] | 391 | }
|
---|
[54761] | 392 |
|
---|
| 393 | /*
|
---|
| 394 | * Unknown fixup.
|
---|
| 395 | */
|
---|
[54763] | 396 | case PATM_ASMFIX_REUSE_LATER_0:
|
---|
| 397 | case PATM_ASMFIX_REUSE_LATER_1:
|
---|
| 398 | case PATM_ASMFIX_REUSE_LATER_2:
|
---|
| 399 | case PATM_ASMFIX_REUSE_LATER_3:
|
---|
[54714] | 400 | default:
|
---|
[54761] | 401 | AssertReleaseMsgFailed(("Unknown fixup: %#x\n", pAsmRecord->aRelocs[i].uType));
|
---|
[54714] | 402 | dest = PATM_ILLEGAL_DESTINATION;
|
---|
| 403 | break;
|
---|
[1] | 404 | }
|
---|
| 405 |
|
---|
[54763] | 406 | if (uRelocType == FIXUP_REL_HELPER_IN_PATCH_ASM_TMPL)
|
---|
| 407 | {
|
---|
| 408 | RTRCUINTPTR RCPtrAfter = pVM->patm.s.pPatchMemGC
|
---|
| 409 | + (RTRCUINTPTR)(&pPB[j + sizeof(RTRCPTR)] - pVM->patm.s.pPatchMemHC);
|
---|
| 410 | dest -= RCPtrAfter;
|
---|
| 411 | }
|
---|
| 412 |
|
---|
| 413 | *(PRTRCPTR)&pPB[j] = dest;
|
---|
| 414 |
|
---|
[54764] | 415 | if (pAsmRecord->aRelocs[i].uType < PATM_ASMFIX_NO_FIXUP)
|
---|
[1] | 416 | {
|
---|
[54761] | 417 | patmPatchAddReloc32(pVM, pPatch, &pPB[j], uRelocType,
|
---|
[54714] | 418 | pAsmRecord->aRelocs[i].uType /*pSources*/, pAsmRecord->aRelocs[i].uType /*pDest*/);
|
---|
[1] | 419 | }
|
---|
| 420 | break;
|
---|
| 421 | }
|
---|
| 422 | }
|
---|
[54686] | 423 | Assert(j < pAsmRecord->cbFunction);
|
---|
[1] | 424 | }
|
---|
[54686] | 425 | Assert(pAsmRecord->aRelocs[i].uInfo == 0xffffffff);
|
---|
[1] | 426 |
|
---|
| 427 | /* Add the jump back to guest code (if required) */
|
---|
| 428 | if (fGenJump)
|
---|
| 429 | {
|
---|
| 430 | int32_t displ = pReturnAddrGC - (PATCHCODE_PTR_GC(pPatch) + pPatch->uCurPatchOffset + pAsmRecord->offJump - 1 + SIZEOF_NEARJUMP32);
|
---|
| 431 |
|
---|
| 432 | /* Add lookup record for patch to guest address translation */
|
---|
| 433 | Assert(pPB[pAsmRecord->offJump - 1] == 0xE9);
|
---|
[44362] | 434 | patmR3AddP2GLookupRecord(pVM, pPatch, &pPB[pAsmRecord->offJump - 1], pReturnAddrGC, PATM_LOOKUP_PATCH2GUEST);
|
---|
[1] | 435 |
|
---|
| 436 | *(uint32_t *)&pPB[pAsmRecord->offJump] = displ;
|
---|
| 437 | patmPatchAddReloc32(pVM, pPatch, &pPB[pAsmRecord->offJump], FIXUP_REL_JMPTOGUEST,
|
---|
[54688] | 438 | PATCHCODE_PTR_GC(pPatch) + pPatch->uCurPatchOffset + pAsmRecord->offJump - 1 + SIZEOF_NEARJUMP32,
|
---|
| 439 | pReturnAddrGC);
|
---|
[1] | 440 | }
|
---|
| 441 |
|
---|
| 442 | // Calculate the right size of this patch block
|
---|
| 443 | if ((fGenJump && pAsmRecord->offJump) || (!fGenJump && !pAsmRecord->offJump))
|
---|
[54686] | 444 | return pAsmRecord->cbFunction;
|
---|
| 445 | // if a jump instruction is present and we don't want one, then subtract SIZEOF_NEARJUMP32
|
---|
| 446 | return pAsmRecord->cbFunction - SIZEOF_NEARJUMP32;
|
---|
[1] | 447 | }
|
---|
| 448 |
|
---|
| 449 | /* Read bytes and check for overwritten instructions. */
|
---|
[9228] | 450 | static int patmPatchReadBytes(PVM pVM, uint8_t *pDest, RTRCPTR pSrc, uint32_t cb)
|
---|
[1] | 451 | {
|
---|
[18927] | 452 | int rc = PGMPhysSimpleReadGCPtr(&pVM->aCpus[0], pDest, pSrc, cb);
|
---|
[1] | 453 | AssertRCReturn(rc, rc);
|
---|
| 454 | /*
|
---|
| 455 | * Could be patched already; make sure this is checked!
|
---|
| 456 | */
|
---|
| 457 | for (uint32_t i=0;i<cb;i++)
|
---|
| 458 | {
|
---|
| 459 | uint8_t temp;
|
---|
| 460 |
|
---|
| 461 | int rc2 = PATMR3QueryOpcode(pVM, pSrc+i, &temp);
|
---|
[13816] | 462 | if (RT_SUCCESS(rc2))
|
---|
[1] | 463 | {
|
---|
| 464 | pDest[i] = temp;
|
---|
| 465 | }
|
---|
| 466 | else
|
---|
| 467 | break; /* no more */
|
---|
| 468 | }
|
---|
| 469 | return VINF_SUCCESS;
|
---|
| 470 | }
|
---|
| 471 |
|
---|
[9212] | 472 | int patmPatchGenDuplicate(PVM pVM, PPATCHINFO pPatch, DISCPUSTATE *pCpu, RCPTRTYPE(uint8_t *) pCurInstrGC)
|
---|
[1] | 473 | {
|
---|
[54746] | 474 | uint32_t const cbInstrShutUpGcc = pCpu->cbInstr;
|
---|
| 475 | PATCHGEN_PROLOG(pVM, pPatch, cbInstrShutUpGcc);
|
---|
[1] | 476 |
|
---|
[54746] | 477 | int rc = patmPatchReadBytes(pVM, pPB, pCurInstrGC, cbInstrShutUpGcc);
|
---|
[1] | 478 | AssertRC(rc);
|
---|
[41727] | 479 | PATCHGEN_EPILOG(pPatch, cbInstrShutUpGcc);
|
---|
[1] | 480 | return rc;
|
---|
| 481 | }
|
---|
| 482 |
|
---|
[9228] | 483 | int patmPatchGenIret(PVM pVM, PPATCHINFO pPatch, RTRCPTR pCurInstrGC, bool fSizeOverride)
|
---|
[1] | 484 | {
|
---|
| 485 | uint32_t size;
|
---|
| 486 | PATMCALLINFO callInfo;
|
---|
[54746] | 487 | PCPATCHASMRECORD pPatchAsmRec = EMIsRawRing1Enabled(pVM) ? &g_patmIretRing1Record : &g_patmIretRecord;
|
---|
[1] | 488 |
|
---|
[54746] | 489 | PATCHGEN_PROLOG(pVM, pPatch, pPatchAsmRec->cbFunction);
|
---|
[1] | 490 |
|
---|
[62652] | 491 | AssertMsg(fSizeOverride == false, ("operand size override!!\n")); RT_NOREF_PV(fSizeOverride);
|
---|
[1] | 492 | callInfo.pCurInstrGC = pCurInstrGC;
|
---|
| 493 |
|
---|
[54746] | 494 | size = patmPatchGenCode(pVM, pPatch, pPB, pPatchAsmRec, 0, false, &callInfo);
|
---|
[1] | 495 |
|
---|
| 496 | PATCHGEN_EPILOG(pPatch, size);
|
---|
| 497 | return VINF_SUCCESS;
|
---|
| 498 | }
|
---|
| 499 |
|
---|
| 500 | int patmPatchGenCli(PVM pVM, PPATCHINFO pPatch)
|
---|
| 501 | {
|
---|
| 502 | uint32_t size;
|
---|
[54746] | 503 | PATCHGEN_PROLOG(pVM, pPatch, g_patmCliRecord.cbFunction);
|
---|
[1] | 504 |
|
---|
[54687] | 505 | size = patmPatchGenCode(pVM, pPatch, pPB, &g_patmCliRecord, 0, false);
|
---|
[1] | 506 |
|
---|
| 507 | PATCHGEN_EPILOG(pPatch, size);
|
---|
| 508 | return VINF_SUCCESS;
|
---|
| 509 | }
|
---|
| 510 |
|
---|
| 511 | /*
|
---|
| 512 | * Generate an STI patch
|
---|
| 513 | */
|
---|
[9228] | 514 | int patmPatchGenSti(PVM pVM, PPATCHINFO pPatch, RTRCPTR pCurInstrGC, RTRCPTR pNextInstrGC)
|
---|
[1] | 515 | {
|
---|
| 516 | PATMCALLINFO callInfo;
|
---|
| 517 | uint32_t size;
|
---|
| 518 |
|
---|
[62652] | 519 | Log(("patmPatchGenSti at %RRv; next %RRv\n", pCurInstrGC, pNextInstrGC)); RT_NOREF_PV(pCurInstrGC);
|
---|
[54746] | 520 | PATCHGEN_PROLOG(pVM, pPatch, g_patmStiRecord.cbFunction);
|
---|
[1] | 521 | callInfo.pNextInstrGC = pNextInstrGC;
|
---|
[54687] | 522 | size = patmPatchGenCode(pVM, pPatch, pPB, &g_patmStiRecord, 0, false, &callInfo);
|
---|
[1] | 523 | PATCHGEN_EPILOG(pPatch, size);
|
---|
| 524 |
|
---|
| 525 | return VINF_SUCCESS;
|
---|
| 526 | }
|
---|
| 527 |
|
---|
| 528 |
|
---|
[9212] | 529 | int patmPatchGenPopf(PVM pVM, PPATCHINFO pPatch, RCPTRTYPE(uint8_t *) pReturnAddrGC, bool fSizeOverride, bool fGenJumpBack)
|
---|
[1] | 530 | {
|
---|
| 531 | uint32_t size;
|
---|
| 532 | PATMCALLINFO callInfo;
|
---|
[54746] | 533 | PCPATCHASMRECORD pPatchAsmRec;
|
---|
| 534 | if (fSizeOverride == true)
|
---|
| 535 | pPatchAsmRec = fGenJumpBack ? &g_patmPopf16Record : &g_patmPopf16Record_NoExit;
|
---|
| 536 | else
|
---|
| 537 | pPatchAsmRec = fGenJumpBack ? &g_patmPopf32Record : &g_patmPopf32Record_NoExit;
|
---|
[1] | 538 |
|
---|
[54746] | 539 | PATCHGEN_PROLOG(pVM, pPatch, pPatchAsmRec->cbFunction);
|
---|
[1] | 540 |
|
---|
| 541 | callInfo.pNextInstrGC = pReturnAddrGC;
|
---|
| 542 |
|
---|
[13822] | 543 | Log(("patmPatchGenPopf at %RRv\n", pReturnAddrGC));
|
---|
[1] | 544 |
|
---|
[4057] | 545 | /* Note: keep IOPL in mind when changing any of this!! (see comments in PATMA.asm, PATMPopf32Replacement) */
|
---|
[1] | 546 | if (fSizeOverride == true)
|
---|
| 547 | Log(("operand size override!!\n"));
|
---|
[54746] | 548 | size = patmPatchGenCode(pVM, pPatch, pPB, pPatchAsmRec, pReturnAddrGC, fGenJumpBack, &callInfo);
|
---|
[1] | 549 |
|
---|
| 550 | PATCHGEN_EPILOG(pPatch, size);
|
---|
| 551 | STAM_COUNTER_INC(&pVM->patm.s.StatGenPopf);
|
---|
| 552 | return VINF_SUCCESS;
|
---|
| 553 | }
|
---|
| 554 |
|
---|
| 555 | int patmPatchGenPushf(PVM pVM, PPATCHINFO pPatch, bool fSizeOverride)
|
---|
| 556 | {
|
---|
| 557 | uint32_t size;
|
---|
[54746] | 558 | PCPATCHASMRECORD pPatchAsmRec = fSizeOverride == true ? &g_patmPushf16Record : &g_patmPushf32Record;
|
---|
| 559 | PATCHGEN_PROLOG(pVM, pPatch, pPatchAsmRec->cbFunction);
|
---|
[1] | 560 |
|
---|
[54746] | 561 | size = patmPatchGenCode(pVM, pPatch, pPB, pPatchAsmRec, 0, false);
|
---|
[1] | 562 |
|
---|
| 563 | PATCHGEN_EPILOG(pPatch, size);
|
---|
| 564 | return VINF_SUCCESS;
|
---|
| 565 | }
|
---|
| 566 |
|
---|
| 567 | int patmPatchGenPushCS(PVM pVM, PPATCHINFO pPatch)
|
---|
| 568 | {
|
---|
| 569 | uint32_t size;
|
---|
[54746] | 570 | PATCHGEN_PROLOG(pVM, pPatch, g_patmPushCSRecord.cbFunction);
|
---|
[54687] | 571 | size = patmPatchGenCode(pVM, pPatch, pPB, &g_patmPushCSRecord, 0, false);
|
---|
[1] | 572 | PATCHGEN_EPILOG(pPatch, size);
|
---|
| 573 | return VINF_SUCCESS;
|
---|
| 574 | }
|
---|
| 575 |
|
---|
[9212] | 576 | int patmPatchGenLoop(PVM pVM, PPATCHINFO pPatch, RCPTRTYPE(uint8_t *) pTargetGC, uint32_t opcode, bool fSizeOverride)
|
---|
[1] | 577 | {
|
---|
| 578 | uint32_t size = 0;
|
---|
[54686] | 579 | PCPATCHASMRECORD pPatchAsmRec;
|
---|
[1] | 580 | switch (opcode)
|
---|
| 581 | {
|
---|
| 582 | case OP_LOOP:
|
---|
[54687] | 583 | pPatchAsmRec = &g_patmLoopRecord;
|
---|
[1] | 584 | break;
|
---|
| 585 | case OP_LOOPNE:
|
---|
[54687] | 586 | pPatchAsmRec = &g_patmLoopNZRecord;
|
---|
[1] | 587 | break;
|
---|
| 588 | case OP_LOOPE:
|
---|
[54687] | 589 | pPatchAsmRec = &g_patmLoopZRecord;
|
---|
[1] | 590 | break;
|
---|
| 591 | case OP_JECXZ:
|
---|
[54687] | 592 | pPatchAsmRec = &g_patmJEcxRecord;
|
---|
[1] | 593 | break;
|
---|
| 594 | default:
|
---|
| 595 | AssertMsgFailed(("PatchGenLoop: invalid opcode %d\n", opcode));
|
---|
| 596 | return VERR_INVALID_PARAMETER;
|
---|
| 597 | }
|
---|
| 598 | Assert(pPatchAsmRec->offSizeOverride && pPatchAsmRec->offRelJump);
|
---|
| 599 |
|
---|
[54746] | 600 | PATCHGEN_PROLOG(pVM, pPatch, pPatchAsmRec->cbFunction);
|
---|
[1] | 601 | Log(("PatchGenLoop %d jump %d to %08x offrel=%d\n", opcode, pPatch->nrJumpRecs, pTargetGC, pPatchAsmRec->offRelJump));
|
---|
| 602 |
|
---|
| 603 | // Generate the patch code
|
---|
| 604 | size = patmPatchGenCode(pVM, pPatch, pPB, pPatchAsmRec, 0, false);
|
---|
| 605 |
|
---|
| 606 | if (fSizeOverride)
|
---|
| 607 | {
|
---|
| 608 | pPB[pPatchAsmRec->offSizeOverride] = 0x66; // ecx -> cx or vice versa
|
---|
| 609 | }
|
---|
| 610 |
|
---|
[9228] | 611 | *(RTRCPTR *)&pPB[pPatchAsmRec->offRelJump] = 0xDEADBEEF;
|
---|
[1] | 612 |
|
---|
| 613 | patmPatchAddJump(pVM, pPatch, &pPB[pPatchAsmRec->offRelJump - 1], 1, pTargetGC, opcode);
|
---|
| 614 |
|
---|
| 615 | PATCHGEN_EPILOG(pPatch, size);
|
---|
| 616 | return VINF_SUCCESS;
|
---|
| 617 | }
|
---|
| 618 |
|
---|
[9212] | 619 | int patmPatchGenRelJump(PVM pVM, PPATCHINFO pPatch, RCPTRTYPE(uint8_t *) pTargetGC, uint32_t opcode, bool fSizeOverride)
|
---|
[1] | 620 | {
|
---|
| 621 | uint32_t offset = 0;
|
---|
[54746] | 622 | PATCHGEN_PROLOG(pVM, pPatch, PATCHGEN_DEF_SIZE);
|
---|
[1] | 623 |
|
---|
| 624 | // internal relative jumps from patch code to patch code; no relocation record required
|
---|
| 625 |
|
---|
| 626 | Assert(PATMIsPatchGCAddr(pVM, pTargetGC) == false);
|
---|
| 627 |
|
---|
| 628 | switch (opcode)
|
---|
| 629 | {
|
---|
| 630 | case OP_JO:
|
---|
| 631 | pPB[1] = 0x80;
|
---|
| 632 | break;
|
---|
| 633 | case OP_JNO:
|
---|
| 634 | pPB[1] = 0x81;
|
---|
| 635 | break;
|
---|
| 636 | case OP_JC:
|
---|
| 637 | pPB[1] = 0x82;
|
---|
| 638 | break;
|
---|
| 639 | case OP_JNC:
|
---|
| 640 | pPB[1] = 0x83;
|
---|
| 641 | break;
|
---|
| 642 | case OP_JE:
|
---|
| 643 | pPB[1] = 0x84;
|
---|
| 644 | break;
|
---|
| 645 | case OP_JNE:
|
---|
| 646 | pPB[1] = 0x85;
|
---|
| 647 | break;
|
---|
| 648 | case OP_JBE:
|
---|
| 649 | pPB[1] = 0x86;
|
---|
| 650 | break;
|
---|
| 651 | case OP_JNBE:
|
---|
| 652 | pPB[1] = 0x87;
|
---|
| 653 | break;
|
---|
| 654 | case OP_JS:
|
---|
| 655 | pPB[1] = 0x88;
|
---|
| 656 | break;
|
---|
| 657 | case OP_JNS:
|
---|
| 658 | pPB[1] = 0x89;
|
---|
| 659 | break;
|
---|
| 660 | case OP_JP:
|
---|
| 661 | pPB[1] = 0x8A;
|
---|
| 662 | break;
|
---|
| 663 | case OP_JNP:
|
---|
| 664 | pPB[1] = 0x8B;
|
---|
| 665 | break;
|
---|
| 666 | case OP_JL:
|
---|
| 667 | pPB[1] = 0x8C;
|
---|
| 668 | break;
|
---|
| 669 | case OP_JNL:
|
---|
| 670 | pPB[1] = 0x8D;
|
---|
| 671 | break;
|
---|
| 672 | case OP_JLE:
|
---|
| 673 | pPB[1] = 0x8E;
|
---|
| 674 | break;
|
---|
| 675 | case OP_JNLE:
|
---|
| 676 | pPB[1] = 0x8F;
|
---|
| 677 | break;
|
---|
| 678 |
|
---|
| 679 | case OP_JMP:
|
---|
| 680 | /* If interrupted here, then jump to the target instruction. Used by PATM.cpp for jumping to known instructions. */
|
---|
| 681 | /* Add lookup record for patch to guest address translation */
|
---|
[44362] | 682 | patmR3AddP2GLookupRecord(pVM, pPatch, pPB, pTargetGC, PATM_LOOKUP_PATCH2GUEST);
|
---|
[1] | 683 |
|
---|
| 684 | pPB[0] = 0xE9;
|
---|
| 685 | break;
|
---|
| 686 |
|
---|
| 687 | case OP_JECXZ:
|
---|
| 688 | case OP_LOOP:
|
---|
| 689 | case OP_LOOPNE:
|
---|
| 690 | case OP_LOOPE:
|
---|
| 691 | return patmPatchGenLoop(pVM, pPatch, pTargetGC, opcode, fSizeOverride);
|
---|
| 692 |
|
---|
| 693 | default:
|
---|
| 694 | AssertMsg(0, ("Invalid jump opcode %d\n", opcode));
|
---|
| 695 | return VERR_PATCHING_REFUSED;
|
---|
| 696 | }
|
---|
| 697 | if (opcode != OP_JMP)
|
---|
| 698 | {
|
---|
| 699 | pPB[0] = 0xF;
|
---|
| 700 | offset += 2;
|
---|
| 701 | }
|
---|
| 702 | else offset++;
|
---|
| 703 |
|
---|
[9228] | 704 | *(RTRCPTR *)&pPB[offset] = 0xDEADBEEF;
|
---|
[1] | 705 |
|
---|
| 706 | patmPatchAddJump(pVM, pPatch, pPB, offset, pTargetGC, opcode);
|
---|
| 707 |
|
---|
[9228] | 708 | offset += sizeof(RTRCPTR);
|
---|
[1] | 709 |
|
---|
| 710 | PATCHGEN_EPILOG(pPatch, offset);
|
---|
| 711 | return VINF_SUCCESS;
|
---|
| 712 | }
|
---|
| 713 |
|
---|
| 714 | /*
|
---|
| 715 | * Rewrite call to dynamic or currently unknown function (on-demand patching of function)
|
---|
| 716 | */
|
---|
[9228] | 717 | int patmPatchGenCall(PVM pVM, PPATCHINFO pPatch, DISCPUSTATE *pCpu, RTRCPTR pCurInstrGC, RTRCPTR pTargetGC, bool fIndirect)
|
---|
[1] | 718 | {
|
---|
| 719 | PATMCALLINFO callInfo;
|
---|
| 720 | uint32_t offset;
|
---|
| 721 | uint32_t i, size;
|
---|
| 722 | int rc;
|
---|
| 723 |
|
---|
| 724 | /** @note Don't check for IF=1 here. The ret instruction will do this. */
|
---|
| 725 | /** @note It's dangerous to do this for 'normal' patches. the jump target might be inside the generated patch jump. (seen this!) */
|
---|
| 726 |
|
---|
| 727 | /* 1: Clear PATM interrupt flag on entry. */
|
---|
| 728 | rc = patmPatchGenClearPIF(pVM, pPatch, pCurInstrGC);
|
---|
| 729 | if (rc == VERR_NO_MEMORY)
|
---|
| 730 | return rc;
|
---|
| 731 | AssertRCReturn(rc, rc);
|
---|
| 732 |
|
---|
[54746] | 733 | PATCHGEN_PROLOG(pVM, pPatch, PATCHGEN_DEF_SIZE);
|
---|
[1] | 734 | /* 2: We must push the target address onto the stack before appending the indirect call code. */
|
---|
| 735 |
|
---|
| 736 | if (fIndirect)
|
---|
| 737 | {
|
---|
| 738 | Log(("patmPatchGenIndirectCall\n"));
|
---|
[41739] | 739 | Assert(pCpu->Param1.cb == 4);
|
---|
[41738] | 740 | Assert(OP_PARM_VTYPE(pCpu->pCurInstr->fParam1) != OP_PARM_J);
|
---|
[1] | 741 |
|
---|
| 742 | /* We push it onto the stack here, so the guest's context isn't ruined when this happens to cause
|
---|
| 743 | * a page fault. The assembly code restores the stack afterwards.
|
---|
| 744 | */
|
---|
| 745 | offset = 0;
|
---|
[1465] | 746 | /* include prefix byte to make sure we don't use the incorrect selector register. */
|
---|
[41734] | 747 | if (pCpu->fPrefix & DISPREFIX_SEG)
|
---|
[1465] | 748 | pPB[offset++] = DISQuerySegPrefixByte(pCpu);
|
---|
[1] | 749 | pPB[offset++] = 0xFF; // push r/m32
|
---|
[8333] | 750 | pPB[offset++] = MAKE_MODRM(pCpu->ModRM.Bits.Mod, 6 /* group 5 */, pCpu->ModRM.Bits.Rm);
|
---|
[1] | 751 | i = 2; /* standard offset of modrm bytes */
|
---|
[41734] | 752 | if (pCpu->fPrefix & DISPREFIX_OPSIZE)
|
---|
[1] | 753 | i++; //skip operand prefix
|
---|
[41734] | 754 | if (pCpu->fPrefix & DISPREFIX_SEG)
|
---|
[1] | 755 | i++; //skip segment prefix
|
---|
| 756 |
|
---|
[41732] | 757 | rc = patmPatchReadBytes(pVM, &pPB[offset], (RTRCPTR)((RTGCUINTPTR32)pCurInstrGC + i), pCpu->cbInstr - i);
|
---|
[1] | 758 | AssertRCReturn(rc, rc);
|
---|
[41732] | 759 | offset += (pCpu->cbInstr - i);
|
---|
[1] | 760 | }
|
---|
| 761 | else
|
---|
| 762 | {
|
---|
[13822] | 763 | AssertMsg(PATMIsPatchGCAddr(pVM, pTargetGC) == false, ("Target is already a patch address (%RRv)?!?\n", pTargetGC));
|
---|
[1] | 764 | Assert(pTargetGC);
|
---|
[41738] | 765 | Assert(OP_PARM_VTYPE(pCpu->pCurInstr->fParam1) == OP_PARM_J);
|
---|
[1] | 766 |
|
---|
| 767 | /** @todo wasting memory as the complex search is overkill and we need only one lookup slot... */
|
---|
| 768 |
|
---|
| 769 | /* Relative call to patch code (patch to patch -> no fixup). */
|
---|
[41732] | 770 | Log(("PatchGenCall from %RRv (next=%RRv) to %RRv\n", pCurInstrGC, pCurInstrGC + pCpu->cbInstr, pTargetGC));
|
---|
[1] | 771 |
|
---|
| 772 | /* We push it onto the stack here, so the guest's context isn't ruined when this happens to cause
|
---|
| 773 | * a page fault. The assembly code restores the stack afterwards.
|
---|
| 774 | */
|
---|
| 775 | offset = 0;
|
---|
| 776 | pPB[offset++] = 0x68; // push %Iv
|
---|
[9228] | 777 | *(RTRCPTR *)&pPB[offset] = pTargetGC;
|
---|
| 778 | offset += sizeof(RTRCPTR);
|
---|
[1] | 779 | }
|
---|
| 780 |
|
---|
| 781 | /* align this block properly to make sure the jump table will not be misaligned. */
|
---|
| 782 | size = (RTHCUINTPTR)&pPB[offset] & 3;
|
---|
| 783 | if (size)
|
---|
| 784 | size = 4 - size;
|
---|
| 785 |
|
---|
| 786 | for (i=0;i<size;i++)
|
---|
| 787 | {
|
---|
| 788 | pPB[offset++] = 0x90; /* nop */
|
---|
| 789 | }
|
---|
| 790 | PATCHGEN_EPILOG(pPatch, offset);
|
---|
| 791 |
|
---|
| 792 | /* 3: Generate code to lookup address in our local cache; call hypervisor PATM code if it can't be located. */
|
---|
[54746] | 793 | PCPATCHASMRECORD pPatchAsmRec = fIndirect ? &g_patmCallIndirectRecord : &g_patmCallRecord;
|
---|
| 794 | PATCHGEN_PROLOG_NODEF(pVM, pPatch, pPatchAsmRec->cbFunction);
|
---|
[41732] | 795 | callInfo.pReturnGC = pCurInstrGC + pCpu->cbInstr;
|
---|
[1] | 796 | callInfo.pTargetGC = (fIndirect) ? 0xDEADBEEF : pTargetGC;
|
---|
[54746] | 797 | size = patmPatchGenCode(pVM, pPatch, pPB, pPatchAsmRec, 0, false, &callInfo);
|
---|
[1] | 798 | PATCHGEN_EPILOG(pPatch, size);
|
---|
| 799 |
|
---|
[54764] | 800 | /* Need to set PATM_ASMFIX_INTERRUPTFLAG after the patched ret returns here. */
|
---|
[1] | 801 | rc = patmPatchGenSetPIF(pVM, pPatch, pCurInstrGC);
|
---|
| 802 | if (rc == VERR_NO_MEMORY)
|
---|
| 803 | return rc;
|
---|
| 804 | AssertRCReturn(rc, rc);
|
---|
| 805 |
|
---|
| 806 | STAM_COUNTER_INC(&pVM->patm.s.StatGenCall);
|
---|
| 807 | return VINF_SUCCESS;
|
---|
| 808 | }
|
---|
| 809 |
|
---|
| 810 | /**
|
---|
| 811 | * Generate indirect jump to unknown destination
|
---|
| 812 | *
|
---|
| 813 | * @returns VBox status code.
|
---|
[58122] | 814 | * @param pVM The cross context VM structure.
|
---|
[1] | 815 | * @param pPatch Patch record
|
---|
| 816 | * @param pCpu Disassembly state
|
---|
| 817 | * @param pCurInstrGC Current instruction address
|
---|
| 818 | */
|
---|
[9228] | 819 | int patmPatchGenJump(PVM pVM, PPATCHINFO pPatch, DISCPUSTATE *pCpu, RTRCPTR pCurInstrGC)
|
---|
[1] | 820 | {
|
---|
| 821 | PATMCALLINFO callInfo;
|
---|
| 822 | uint32_t offset;
|
---|
| 823 | uint32_t i, size;
|
---|
| 824 | int rc;
|
---|
| 825 |
|
---|
| 826 | /* 1: Clear PATM interrupt flag on entry. */
|
---|
| 827 | rc = patmPatchGenClearPIF(pVM, pPatch, pCurInstrGC);
|
---|
| 828 | if (rc == VERR_NO_MEMORY)
|
---|
| 829 | return rc;
|
---|
| 830 | AssertRCReturn(rc, rc);
|
---|
| 831 |
|
---|
[54746] | 832 | PATCHGEN_PROLOG(pVM, pPatch, PATCHGEN_DEF_SIZE);
|
---|
[1] | 833 | /* 2: We must push the target address onto the stack before appending the indirect call code. */
|
---|
| 834 |
|
---|
| 835 | Log(("patmPatchGenIndirectJump\n"));
|
---|
[41739] | 836 | Assert(pCpu->Param1.cb == 4);
|
---|
[41738] | 837 | Assert(OP_PARM_VTYPE(pCpu->pCurInstr->fParam1) != OP_PARM_J);
|
---|
[1] | 838 |
|
---|
| 839 | /* We push it onto the stack here, so the guest's context isn't ruined when this happens to cause
|
---|
| 840 | * a page fault. The assembly code restores the stack afterwards.
|
---|
| 841 | */
|
---|
| 842 | offset = 0;
|
---|
[1465] | 843 | /* include prefix byte to make sure we don't use the incorrect selector register. */
|
---|
[41734] | 844 | if (pCpu->fPrefix & DISPREFIX_SEG)
|
---|
[1465] | 845 | pPB[offset++] = DISQuerySegPrefixByte(pCpu);
|
---|
| 846 |
|
---|
[1] | 847 | pPB[offset++] = 0xFF; // push r/m32
|
---|
[8333] | 848 | pPB[offset++] = MAKE_MODRM(pCpu->ModRM.Bits.Mod, 6 /* group 5 */, pCpu->ModRM.Bits.Rm);
|
---|
[1] | 849 | i = 2; /* standard offset of modrm bytes */
|
---|
[41734] | 850 | if (pCpu->fPrefix & DISPREFIX_OPSIZE)
|
---|
[1] | 851 | i++; //skip operand prefix
|
---|
[41734] | 852 | if (pCpu->fPrefix & DISPREFIX_SEG)
|
---|
[1] | 853 | i++; //skip segment prefix
|
---|
| 854 |
|
---|
[41732] | 855 | rc = patmPatchReadBytes(pVM, &pPB[offset], (RTRCPTR)((RTGCUINTPTR32)pCurInstrGC + i), pCpu->cbInstr - i);
|
---|
[1] | 856 | AssertRCReturn(rc, rc);
|
---|
[41732] | 857 | offset += (pCpu->cbInstr - i);
|
---|
[1] | 858 |
|
---|
| 859 | /* align this block properly to make sure the jump table will not be misaligned. */
|
---|
| 860 | size = (RTHCUINTPTR)&pPB[offset] & 3;
|
---|
| 861 | if (size)
|
---|
| 862 | size = 4 - size;
|
---|
| 863 |
|
---|
| 864 | for (i=0;i<size;i++)
|
---|
| 865 | {
|
---|
| 866 | pPB[offset++] = 0x90; /* nop */
|
---|
| 867 | }
|
---|
| 868 | PATCHGEN_EPILOG(pPatch, offset);
|
---|
| 869 |
|
---|
| 870 | /* 3: Generate code to lookup address in our local cache; call hypervisor PATM code if it can't be located. */
|
---|
[54746] | 871 | PATCHGEN_PROLOG_NODEF(pVM, pPatch, g_patmJumpIndirectRecord.cbFunction);
|
---|
[41732] | 872 | callInfo.pReturnGC = pCurInstrGC + pCpu->cbInstr;
|
---|
[1] | 873 | callInfo.pTargetGC = 0xDEADBEEF;
|
---|
[54687] | 874 | size = patmPatchGenCode(pVM, pPatch, pPB, &g_patmJumpIndirectRecord, 0, false, &callInfo);
|
---|
[1] | 875 | PATCHGEN_EPILOG(pPatch, size);
|
---|
| 876 |
|
---|
| 877 | STAM_COUNTER_INC(&pVM->patm.s.StatGenJump);
|
---|
| 878 | return VINF_SUCCESS;
|
---|
| 879 | }
|
---|
| 880 |
|
---|
| 881 | /**
|
---|
| 882 | * Generate return instruction
|
---|
| 883 | *
|
---|
| 884 | * @returns VBox status code.
|
---|
[58122] | 885 | * @param pVM The cross context VM structure.
|
---|
[1] | 886 | * @param pPatch Patch structure
|
---|
| 887 | * @param pCpu Disassembly struct
|
---|
| 888 | * @param pCurInstrGC Current instruction pointer
|
---|
| 889 | *
|
---|
| 890 | */
|
---|
[9212] | 891 | int patmPatchGenRet(PVM pVM, PPATCHINFO pPatch, DISCPUSTATE *pCpu, RCPTRTYPE(uint8_t *) pCurInstrGC)
|
---|
[1] | 892 | {
|
---|
[9228] | 893 | RTRCPTR pPatchRetInstrGC;
|
---|
[1] | 894 |
|
---|
| 895 | /* Remember start of this patch for below. */
|
---|
| 896 | pPatchRetInstrGC = PATCHCODE_PTR_GC(pPatch) + pPatch->uCurPatchOffset;
|
---|
| 897 |
|
---|
[13822] | 898 | Log(("patmPatchGenRet %RRv\n", pCurInstrGC));
|
---|
[1] | 899 |
|
---|
| 900 | /** @note optimization: multiple identical ret instruction in a single patch can share a single patched ret. */
|
---|
| 901 | if ( pPatch->pTempInfo->pPatchRetInstrGC
|
---|
[41741] | 902 | && pPatch->pTempInfo->uPatchRetParam1 == (uint32_t)pCpu->Param1.uValue) /* nr of bytes popped off the stack should be identical of course! */
|
---|
[1] | 903 | {
|
---|
[41737] | 904 | Assert(pCpu->pCurInstr->uOpcode == OP_RETN);
|
---|
[1] | 905 | STAM_COUNTER_INC(&pVM->patm.s.StatGenRetReused);
|
---|
| 906 |
|
---|
| 907 | return patmPatchGenPatchJump(pVM, pPatch, pCurInstrGC, pPatch->pTempInfo->pPatchRetInstrGC);
|
---|
| 908 | }
|
---|
| 909 |
|
---|
| 910 | /* Jump back to the original instruction if IF is set again. */
|
---|
[44362] | 911 | Assert(!patmFindActivePatchByEntrypoint(pVM, pCurInstrGC));
|
---|
[54746] | 912 | int rc = patmPatchGenCheckIF(pVM, pPatch, pCurInstrGC);
|
---|
[1] | 913 | AssertRCReturn(rc, rc);
|
---|
| 914 |
|
---|
| 915 | /* align this block properly to make sure the jump table will not be misaligned. */
|
---|
[54746] | 916 | PATCHGEN_PROLOG(pVM, pPatch, 4);
|
---|
| 917 | uint32_t size = (RTHCUINTPTR)pPB & 3;
|
---|
[1] | 918 | if (size)
|
---|
| 919 | size = 4 - size;
|
---|
| 920 |
|
---|
[54746] | 921 | for (uint32_t i = 0; i < size; i++)
|
---|
[1] | 922 | pPB[i] = 0x90; /* nop */
|
---|
| 923 | PATCHGEN_EPILOG(pPatch, size);
|
---|
| 924 |
|
---|
[54746] | 925 | PATCHGEN_PROLOG_NODEF(pVM, pPatch, g_patmRetRecord.cbFunction);
|
---|
[54687] | 926 | size = patmPatchGenCode(pVM, pPatch, pPB, &g_patmRetRecord, 0, false);
|
---|
[1] | 927 | PATCHGEN_EPILOG(pPatch, size);
|
---|
| 928 |
|
---|
| 929 | STAM_COUNTER_INC(&pVM->patm.s.StatGenRet);
|
---|
| 930 | /* Duplicate the ret or ret n instruction; it will use the PATM return address */
|
---|
| 931 | rc = patmPatchGenDuplicate(pVM, pPatch, pCpu, pCurInstrGC);
|
---|
| 932 |
|
---|
| 933 | if (rc == VINF_SUCCESS)
|
---|
| 934 | {
|
---|
| 935 | pPatch->pTempInfo->pPatchRetInstrGC = pPatchRetInstrGC;
|
---|
[41741] | 936 | pPatch->pTempInfo->uPatchRetParam1 = pCpu->Param1.uValue;
|
---|
[1] | 937 | }
|
---|
| 938 | return rc;
|
---|
| 939 | }
|
---|
| 940 |
|
---|
| 941 | /**
|
---|
| 942 | * Generate all global patm functions
|
---|
| 943 | *
|
---|
| 944 | * @returns VBox status code.
|
---|
[58122] | 945 | * @param pVM The cross context VM structure.
|
---|
[1] | 946 | * @param pPatch Patch structure
|
---|
| 947 | *
|
---|
| 948 | */
|
---|
| 949 | int patmPatchGenGlobalFunctions(PVM pVM, PPATCHINFO pPatch)
|
---|
| 950 | {
|
---|
| 951 | pVM->patm.s.pfnHelperCallGC = PATCHCODE_PTR_GC(pPatch) + pPatch->uCurPatchOffset;
|
---|
[54746] | 952 | PATCHGEN_PROLOG(pVM, pPatch, g_patmLookupAndCallRecord.cbFunction);
|
---|
| 953 | uint32_t size = patmPatchGenCode(pVM, pPatch, pPB, &g_patmLookupAndCallRecord, 0, false);
|
---|
[1] | 954 | PATCHGEN_EPILOG(pPatch, size);
|
---|
| 955 |
|
---|
| 956 | /* Round to next 8 byte boundary. */
|
---|
| 957 | pPatch->uCurPatchOffset = RT_ALIGN_32(pPatch->uCurPatchOffset, 8);
|
---|
| 958 |
|
---|
| 959 | pVM->patm.s.pfnHelperRetGC = PATCHCODE_PTR_GC(pPatch) + pPatch->uCurPatchOffset;
|
---|
[54746] | 960 | PATCHGEN_PROLOG_NODEF(pVM, pPatch, g_patmRetFunctionRecord.cbFunction);
|
---|
[54687] | 961 | size = patmPatchGenCode(pVM, pPatch, pPB, &g_patmRetFunctionRecord, 0, false);
|
---|
[1] | 962 | PATCHGEN_EPILOG(pPatch, size);
|
---|
| 963 |
|
---|
| 964 | /* Round to next 8 byte boundary. */
|
---|
| 965 | pPatch->uCurPatchOffset = RT_ALIGN_32(pPatch->uCurPatchOffset, 8);
|
---|
| 966 |
|
---|
| 967 | pVM->patm.s.pfnHelperJumpGC = PATCHCODE_PTR_GC(pPatch) + pPatch->uCurPatchOffset;
|
---|
[54746] | 968 | PATCHGEN_PROLOG_NODEF(pVM, pPatch, g_patmLookupAndJumpRecord.cbFunction);
|
---|
[54687] | 969 | size = patmPatchGenCode(pVM, pPatch, pPB, &g_patmLookupAndJumpRecord, 0, false);
|
---|
[1] | 970 | PATCHGEN_EPILOG(pPatch, size);
|
---|
| 971 |
|
---|
[302] | 972 | /* Round to next 8 byte boundary. */
|
---|
| 973 | pPatch->uCurPatchOffset = RT_ALIGN_32(pPatch->uCurPatchOffset, 8);
|
---|
| 974 |
|
---|
| 975 | pVM->patm.s.pfnHelperIretGC = PATCHCODE_PTR_GC(pPatch) + pPatch->uCurPatchOffset;
|
---|
[54746] | 976 | PATCHGEN_PROLOG_NODEF(pVM, pPatch, g_patmIretFunctionRecord.cbFunction);
|
---|
[54687] | 977 | size = patmPatchGenCode(pVM, pPatch, pPB, &g_patmIretFunctionRecord, 0, false);
|
---|
[302] | 978 | PATCHGEN_EPILOG(pPatch, size);
|
---|
| 979 |
|
---|
[13822] | 980 | Log(("pfnHelperCallGC %RRv\n", pVM->patm.s.pfnHelperCallGC));
|
---|
| 981 | Log(("pfnHelperRetGC %RRv\n", pVM->patm.s.pfnHelperRetGC));
|
---|
| 982 | Log(("pfnHelperJumpGC %RRv\n", pVM->patm.s.pfnHelperJumpGC));
|
---|
| 983 | Log(("pfnHelperIretGC %RRv\n", pVM->patm.s.pfnHelperIretGC));
|
---|
[1] | 984 |
|
---|
| 985 | return VINF_SUCCESS;
|
---|
| 986 | }
|
---|
| 987 |
|
---|
| 988 | /**
|
---|
| 989 | * Generate illegal instruction (int 3)
|
---|
| 990 | *
|
---|
| 991 | * @returns VBox status code.
|
---|
[58122] | 992 | * @param pVM The cross context VM structure.
|
---|
[1] | 993 | * @param pPatch Patch structure
|
---|
| 994 | *
|
---|
| 995 | */
|
---|
| 996 | int patmPatchGenIllegalInstr(PVM pVM, PPATCHINFO pPatch)
|
---|
| 997 | {
|
---|
[54746] | 998 | PATCHGEN_PROLOG(pVM, pPatch, 1);
|
---|
[1] | 999 |
|
---|
| 1000 | pPB[0] = 0xCC;
|
---|
| 1001 |
|
---|
| 1002 | PATCHGEN_EPILOG(pPatch, 1);
|
---|
| 1003 | return VINF_SUCCESS;
|
---|
| 1004 | }
|
---|
| 1005 |
|
---|
| 1006 | /**
|
---|
| 1007 | * Check virtual IF flag and jump back to original guest code if set
|
---|
| 1008 | *
|
---|
| 1009 | * @returns VBox status code.
|
---|
[58122] | 1010 | * @param pVM The cross context VM structure.
|
---|
[1] | 1011 | * @param pPatch Patch structure
|
---|
| 1012 | * @param pCurInstrGC Guest context pointer to the current instruction
|
---|
| 1013 | *
|
---|
| 1014 | */
|
---|
[9228] | 1015 | int patmPatchGenCheckIF(PVM pVM, PPATCHINFO pPatch, RTRCPTR pCurInstrGC)
|
---|
[1] | 1016 | {
|
---|
| 1017 | uint32_t size;
|
---|
| 1018 |
|
---|
[54746] | 1019 | PATCHGEN_PROLOG(pVM, pPatch, g_patmCheckIFRecord.cbFunction);
|
---|
[1] | 1020 |
|
---|
| 1021 | /* Add lookup record for patch to guest address translation */
|
---|
[44362] | 1022 | patmR3AddP2GLookupRecord(pVM, pPatch, pPB, pCurInstrGC, PATM_LOOKUP_PATCH2GUEST);
|
---|
[1] | 1023 |
|
---|
| 1024 | /* Generate code to check for IF=1 before executing the call to the duplicated function. */
|
---|
[54687] | 1025 | size = patmPatchGenCode(pVM, pPatch, pPB, &g_patmCheckIFRecord, pCurInstrGC, true);
|
---|
[1] | 1026 |
|
---|
| 1027 | PATCHGEN_EPILOG(pPatch, size);
|
---|
| 1028 | return VINF_SUCCESS;
|
---|
| 1029 | }
|
---|
| 1030 |
|
---|
| 1031 | /**
|
---|
| 1032 | * Set PATM interrupt flag
|
---|
| 1033 | *
|
---|
| 1034 | * @returns VBox status code.
|
---|
[58122] | 1035 | * @param pVM The cross context VM structure.
|
---|
[1] | 1036 | * @param pPatch Patch structure
|
---|
| 1037 | * @param pInstrGC Corresponding guest instruction
|
---|
| 1038 | *
|
---|
| 1039 | */
|
---|
[9228] | 1040 | int patmPatchGenSetPIF(PVM pVM, PPATCHINFO pPatch, RTRCPTR pInstrGC)
|
---|
[1] | 1041 | {
|
---|
[54746] | 1042 | PATCHGEN_PROLOG(pVM, pPatch, g_patmSetPIFRecord.cbFunction);
|
---|
[1] | 1043 |
|
---|
| 1044 | /* Add lookup record for patch to guest address translation */
|
---|
[44362] | 1045 | patmR3AddP2GLookupRecord(pVM, pPatch, pPB, pInstrGC, PATM_LOOKUP_PATCH2GUEST);
|
---|
[1] | 1046 |
|
---|
[54746] | 1047 | uint32_t size = patmPatchGenCode(pVM, pPatch, pPB, &g_patmSetPIFRecord, 0, false);
|
---|
[1] | 1048 | PATCHGEN_EPILOG(pPatch, size);
|
---|
| 1049 | return VINF_SUCCESS;
|
---|
| 1050 | }
|
---|
| 1051 |
|
---|
| 1052 | /**
|
---|
| 1053 | * Clear PATM interrupt flag
|
---|
| 1054 | *
|
---|
| 1055 | * @returns VBox status code.
|
---|
[58122] | 1056 | * @param pVM The cross context VM structure.
|
---|
[1] | 1057 | * @param pPatch Patch structure
|
---|
| 1058 | * @param pInstrGC Corresponding guest instruction
|
---|
| 1059 | *
|
---|
| 1060 | */
|
---|
[9228] | 1061 | int patmPatchGenClearPIF(PVM pVM, PPATCHINFO pPatch, RTRCPTR pInstrGC)
|
---|
[1] | 1062 | {
|
---|
[54746] | 1063 | PATCHGEN_PROLOG(pVM, pPatch, g_patmSetPIFRecord.cbFunction);
|
---|
[1] | 1064 |
|
---|
| 1065 | /* Add lookup record for patch to guest address translation */
|
---|
[44362] | 1066 | patmR3AddP2GLookupRecord(pVM, pPatch, pPB, pInstrGC, PATM_LOOKUP_PATCH2GUEST);
|
---|
[1] | 1067 |
|
---|
[54746] | 1068 | uint32_t size = patmPatchGenCode(pVM, pPatch, pPB, &g_patmClearPIFRecord, 0, false);
|
---|
[1] | 1069 | PATCHGEN_EPILOG(pPatch, size);
|
---|
| 1070 | return VINF_SUCCESS;
|
---|
| 1071 | }
|
---|
| 1072 |
|
---|
| 1073 |
|
---|
| 1074 | /**
|
---|
| 1075 | * Clear PATM inhibit irq flag
|
---|
| 1076 | *
|
---|
| 1077 | * @returns VBox status code.
|
---|
[58122] | 1078 | * @param pVM The cross context VM structure.
|
---|
[1] | 1079 | * @param pPatch Patch structure
|
---|
| 1080 | * @param pNextInstrGC Next guest instruction
|
---|
| 1081 | */
|
---|
[9228] | 1082 | int patmPatchGenClearInhibitIRQ(PVM pVM, PPATCHINFO pPatch, RTRCPTR pNextInstrGC)
|
---|
[1] | 1083 | {
|
---|
| 1084 | PATMCALLINFO callInfo;
|
---|
[54746] | 1085 | PCPATCHASMRECORD pPatchAsmRec = pPatch->flags & PATMFL_DUPLICATE_FUNCTION
|
---|
| 1086 | ? &g_patmClearInhibitIRQContIF0Record : &g_patmClearInhibitIRQFaultIF0Record;
|
---|
| 1087 | PATCHGEN_PROLOG(pVM, pPatch, pPatchAsmRec->cbFunction);
|
---|
[1] | 1088 |
|
---|
| 1089 | Assert((pPatch->flags & (PATMFL_GENERATE_JUMPTOGUEST|PATMFL_DUPLICATE_FUNCTION)) != (PATMFL_GENERATE_JUMPTOGUEST|PATMFL_DUPLICATE_FUNCTION));
|
---|
| 1090 |
|
---|
| 1091 | /* Add lookup record for patch to guest address translation */
|
---|
[44362] | 1092 | patmR3AddP2GLookupRecord(pVM, pPatch, pPB, pNextInstrGC, PATM_LOOKUP_PATCH2GUEST);
|
---|
[1] | 1093 |
|
---|
| 1094 | callInfo.pNextInstrGC = pNextInstrGC;
|
---|
| 1095 |
|
---|
[54746] | 1096 | uint32_t size = patmPatchGenCode(pVM, pPatch, pPB, pPatchAsmRec, 0, false, &callInfo);
|
---|
[1] | 1097 |
|
---|
| 1098 | PATCHGEN_EPILOG(pPatch, size);
|
---|
| 1099 | return VINF_SUCCESS;
|
---|
| 1100 | }
|
---|
| 1101 |
|
---|
| 1102 | /**
|
---|
| 1103 | * Generate an interrupt handler entrypoint
|
---|
| 1104 | *
|
---|
| 1105 | * @returns VBox status code.
|
---|
[58122] | 1106 | * @param pVM The cross context VM structure.
|
---|
[1] | 1107 | * @param pPatch Patch record
|
---|
| 1108 | * @param pIntHandlerGC IDT handler address
|
---|
| 1109 | *
|
---|
| 1110 | ** @todo must check if virtual IF is already cleared on entry!!!!!!!!!!!!!!!!!!!!!!!
|
---|
| 1111 | */
|
---|
[9228] | 1112 | int patmPatchGenIntEntry(PVM pVM, PPATCHINFO pPatch, RTRCPTR pIntHandlerGC)
|
---|
[1] | 1113 | {
|
---|
| 1114 | int rc = VINF_SUCCESS;
|
---|
| 1115 |
|
---|
[45485] | 1116 | if (!EMIsRawRing1Enabled(pVM)) /* direct passthru of interrupts is not allowed in the ring-1 support case as we can't
|
---|
| 1117 | deal with the ring-1/2 ambiguity in the patm asm code and we don't need it either as
|
---|
| 1118 | TRPMForwardTrap takes care of the details. */
|
---|
[45276] | 1119 | {
|
---|
| 1120 | uint32_t size;
|
---|
[54746] | 1121 | PCPATCHASMRECORD pPatchAsmRec = pPatch->flags & PATMFL_INTHANDLER_WITH_ERRORCODE
|
---|
| 1122 | ? &g_patmIntEntryRecordErrorCode : &g_patmIntEntryRecord;
|
---|
| 1123 | PATCHGEN_PROLOG(pVM, pPatch, pPatchAsmRec->cbFunction);
|
---|
[1] | 1124 |
|
---|
[45276] | 1125 | /* Add lookup record for patch to guest address translation */
|
---|
| 1126 | patmR3AddP2GLookupRecord(pVM, pPatch, pPB, pIntHandlerGC, PATM_LOOKUP_PATCH2GUEST);
|
---|
[1] | 1127 |
|
---|
[45276] | 1128 | /* Generate entrypoint for the interrupt handler (correcting CS in the interrupt stack frame) */
|
---|
[54746] | 1129 | size = patmPatchGenCode(pVM, pPatch, pPB, pPatchAsmRec, 0, false);
|
---|
[1] | 1130 |
|
---|
[45276] | 1131 | PATCHGEN_EPILOG(pPatch, size);
|
---|
| 1132 | }
|
---|
[1] | 1133 |
|
---|
| 1134 | // Interrupt gates set IF to 0
|
---|
| 1135 | rc = patmPatchGenCli(pVM, pPatch);
|
---|
| 1136 | AssertRCReturn(rc, rc);
|
---|
| 1137 |
|
---|
| 1138 | return rc;
|
---|
| 1139 | }
|
---|
| 1140 |
|
---|
| 1141 | /**
|
---|
| 1142 | * Generate a trap handler entrypoint
|
---|
| 1143 | *
|
---|
| 1144 | * @returns VBox status code.
|
---|
[58122] | 1145 | * @param pVM The cross context VM structure.
|
---|
[1] | 1146 | * @param pPatch Patch record
|
---|
| 1147 | * @param pTrapHandlerGC IDT handler address
|
---|
| 1148 | */
|
---|
[9228] | 1149 | int patmPatchGenTrapEntry(PVM pVM, PPATCHINFO pPatch, RTRCPTR pTrapHandlerGC)
|
---|
[1] | 1150 | {
|
---|
| 1151 | uint32_t size;
|
---|
[54746] | 1152 | PCPATCHASMRECORD pPatchAsmRec = (pPatch->flags & PATMFL_TRAPHANDLER_WITH_ERRORCODE)
|
---|
| 1153 | ? &g_patmTrapEntryRecordErrorCode : &g_patmTrapEntryRecord;
|
---|
[1] | 1154 |
|
---|
[45276] | 1155 | Assert(!EMIsRawRing1Enabled(pVM));
|
---|
| 1156 |
|
---|
[54746] | 1157 | PATCHGEN_PROLOG(pVM, pPatch, pPatchAsmRec->cbFunction);
|
---|
[1] | 1158 |
|
---|
| 1159 | /* Add lookup record for patch to guest address translation */
|
---|
[44362] | 1160 | patmR3AddP2GLookupRecord(pVM, pPatch, pPB, pTrapHandlerGC, PATM_LOOKUP_PATCH2GUEST);
|
---|
[1] | 1161 |
|
---|
| 1162 | /* Generate entrypoint for the trap handler (correcting CS in the interrupt stack frame) */
|
---|
[54746] | 1163 | size = patmPatchGenCode(pVM, pPatch, pPB, pPatchAsmRec, pTrapHandlerGC, true);
|
---|
[1] | 1164 | PATCHGEN_EPILOG(pPatch, size);
|
---|
| 1165 |
|
---|
| 1166 | return VINF_SUCCESS;
|
---|
| 1167 | }
|
---|
| 1168 |
|
---|
| 1169 | #ifdef VBOX_WITH_STATISTICS
|
---|
[9228] | 1170 | int patmPatchGenStats(PVM pVM, PPATCHINFO pPatch, RTRCPTR pInstrGC)
|
---|
[1] | 1171 | {
|
---|
| 1172 | uint32_t size;
|
---|
| 1173 |
|
---|
[54746] | 1174 | PATCHGEN_PROLOG(pVM, pPatch, g_patmStatsRecord.cbFunction);
|
---|
[1] | 1175 |
|
---|
| 1176 | /* Add lookup record for stats code -> guest handler. */
|
---|
[44362] | 1177 | patmR3AddP2GLookupRecord(pVM, pPatch, pPB, pInstrGC, PATM_LOOKUP_PATCH2GUEST);
|
---|
[1] | 1178 |
|
---|
| 1179 | /* Generate code to keep calling statistics for this patch */
|
---|
[54687] | 1180 | size = patmPatchGenCode(pVM, pPatch, pPB, &g_patmStatsRecord, pInstrGC, false);
|
---|
[1] | 1181 | PATCHGEN_EPILOG(pPatch, size);
|
---|
| 1182 |
|
---|
| 1183 | return VINF_SUCCESS;
|
---|
| 1184 | }
|
---|
| 1185 | #endif
|
---|
| 1186 |
|
---|
| 1187 | /**
|
---|
| 1188 | * Debug register moves to or from general purpose registers
|
---|
| 1189 | * mov GPR, DRx
|
---|
| 1190 | * mov DRx, GPR
|
---|
| 1191 | *
|
---|
| 1192 | * @todo: if we ever want to support hardware debug registers natively, then
|
---|
| 1193 | * this will need to be changed!
|
---|
| 1194 | */
|
---|
| 1195 | int patmPatchGenMovDebug(PVM pVM, PPATCHINFO pPatch, DISCPUSTATE *pCpu)
|
---|
| 1196 | {
|
---|
| 1197 | int rc = VINF_SUCCESS;
|
---|
[41728] | 1198 | unsigned reg, mod, rm, dbgreg;
|
---|
[1] | 1199 | uint32_t offset;
|
---|
| 1200 |
|
---|
[54746] | 1201 | PATCHGEN_PROLOG(pVM, pPatch, PATCHGEN_DEF_SIZE);
|
---|
[1] | 1202 |
|
---|
| 1203 | mod = 0; //effective address (only)
|
---|
| 1204 | rm = 5; //disp32
|
---|
[41738] | 1205 | if (pCpu->pCurInstr->fParam1 == OP_PARM_Dd)
|
---|
[1] | 1206 | {
|
---|
| 1207 | Assert(0); // You not come here. Illegal!
|
---|
| 1208 |
|
---|
| 1209 | // mov DRx, GPR
|
---|
| 1210 | pPB[0] = 0x89; //mov disp32, GPR
|
---|
[41739] | 1211 | Assert(pCpu->Param1.fUse & DISUSE_REG_DBG);
|
---|
| 1212 | Assert(pCpu->Param2.fUse & DISUSE_REG_GEN32);
|
---|
[1] | 1213 |
|
---|
[41744] | 1214 | dbgreg = pCpu->Param1.Base.idxDbgReg;
|
---|
| 1215 | reg = pCpu->Param2.Base.idxGenReg;
|
---|
[1] | 1216 | }
|
---|
| 1217 | else
|
---|
| 1218 | {
|
---|
| 1219 | // mov GPR, DRx
|
---|
[41739] | 1220 | Assert(pCpu->Param1.fUse & DISUSE_REG_GEN32);
|
---|
| 1221 | Assert(pCpu->Param2.fUse & DISUSE_REG_DBG);
|
---|
[1] | 1222 |
|
---|
| 1223 | pPB[0] = 0x8B; // mov GPR, disp32
|
---|
[41744] | 1224 | reg = pCpu->Param1.Base.idxGenReg;
|
---|
| 1225 | dbgreg = pCpu->Param2.Base.idxDbgReg;
|
---|
[1] | 1226 | }
|
---|
| 1227 |
|
---|
| 1228 | pPB[1] = MAKE_MODRM(mod, reg, rm);
|
---|
| 1229 |
|
---|
[41728] | 1230 | AssertReturn(dbgreg <= DISDREG_DR7, VERR_INVALID_PARAMETER);
|
---|
[73097] | 1231 | offset = RT_UOFFSETOF_DYN(CPUMCTX, dr[dbgreg]);
|
---|
[12600] | 1232 |
|
---|
[9228] | 1233 | *(RTRCPTR *)&pPB[2] = pVM->patm.s.pCPUMCtxGC + offset;
|
---|
[1] | 1234 | patmPatchAddReloc32(pVM, pPatch, &pPB[2], FIXUP_ABSOLUTE);
|
---|
| 1235 |
|
---|
[9228] | 1236 | PATCHGEN_EPILOG(pPatch, 2 + sizeof(RTRCPTR));
|
---|
[1] | 1237 | return rc;
|
---|
| 1238 | }
|
---|
| 1239 |
|
---|
| 1240 | /*
|
---|
| 1241 | * Control register moves to or from general purpose registers
|
---|
| 1242 | * mov GPR, CRx
|
---|
| 1243 | * mov CRx, GPR
|
---|
| 1244 | */
|
---|
| 1245 | int patmPatchGenMovControl(PVM pVM, PPATCHINFO pPatch, DISCPUSTATE *pCpu)
|
---|
| 1246 | {
|
---|
| 1247 | int rc = VINF_SUCCESS;
|
---|
| 1248 | int reg, mod, rm, ctrlreg;
|
---|
| 1249 | uint32_t offset;
|
---|
| 1250 |
|
---|
[54746] | 1251 | PATCHGEN_PROLOG(pVM, pPatch, PATCHGEN_DEF_SIZE);
|
---|
[1] | 1252 |
|
---|
| 1253 | mod = 0; //effective address (only)
|
---|
| 1254 | rm = 5; //disp32
|
---|
[41738] | 1255 | if (pCpu->pCurInstr->fParam1 == OP_PARM_Cd)
|
---|
[1] | 1256 | {
|
---|
| 1257 | Assert(0); // You not come here. Illegal!
|
---|
| 1258 |
|
---|
| 1259 | // mov CRx, GPR
|
---|
| 1260 | pPB[0] = 0x89; //mov disp32, GPR
|
---|
[41744] | 1261 | ctrlreg = pCpu->Param1.Base.idxCtrlReg;
|
---|
| 1262 | reg = pCpu->Param2.Base.idxGenReg;
|
---|
[41739] | 1263 | Assert(pCpu->Param1.fUse & DISUSE_REG_CR);
|
---|
| 1264 | Assert(pCpu->Param2.fUse & DISUSE_REG_GEN32);
|
---|
[1] | 1265 | }
|
---|
| 1266 | else
|
---|
| 1267 | {
|
---|
[42481] | 1268 | // mov GPR, CRx
|
---|
[41739] | 1269 | Assert(pCpu->Param1.fUse & DISUSE_REG_GEN32);
|
---|
| 1270 | Assert(pCpu->Param2.fUse & DISUSE_REG_CR);
|
---|
[1] | 1271 |
|
---|
| 1272 | pPB[0] = 0x8B; // mov GPR, disp32
|
---|
[41744] | 1273 | reg = pCpu->Param1.Base.idxGenReg;
|
---|
| 1274 | ctrlreg = pCpu->Param2.Base.idxCtrlReg;
|
---|
[1] | 1275 | }
|
---|
| 1276 |
|
---|
| 1277 | pPB[1] = MAKE_MODRM(mod, reg, rm);
|
---|
| 1278 |
|
---|
[63560] | 1279 | /// @todo make this an array in the context structure
|
---|
[1] | 1280 | switch (ctrlreg)
|
---|
| 1281 | {
|
---|
[41728] | 1282 | case DISCREG_CR0:
|
---|
[1] | 1283 | offset = RT_OFFSETOF(CPUMCTX, cr0);
|
---|
| 1284 | break;
|
---|
[41728] | 1285 | case DISCREG_CR2:
|
---|
[1] | 1286 | offset = RT_OFFSETOF(CPUMCTX, cr2);
|
---|
| 1287 | break;
|
---|
[41728] | 1288 | case DISCREG_CR3:
|
---|
[1] | 1289 | offset = RT_OFFSETOF(CPUMCTX, cr3);
|
---|
| 1290 | break;
|
---|
[41728] | 1291 | case DISCREG_CR4:
|
---|
[1] | 1292 | offset = RT_OFFSETOF(CPUMCTX, cr4);
|
---|
| 1293 | break;
|
---|
| 1294 | default: /* Shut up compiler warning. */
|
---|
| 1295 | AssertFailed();
|
---|
| 1296 | offset = 0;
|
---|
| 1297 | break;
|
---|
| 1298 | }
|
---|
[9228] | 1299 | *(RTRCPTR *)&pPB[2] = pVM->patm.s.pCPUMCtxGC + offset;
|
---|
[1] | 1300 | patmPatchAddReloc32(pVM, pPatch, &pPB[2], FIXUP_ABSOLUTE);
|
---|
| 1301 |
|
---|
[9228] | 1302 | PATCHGEN_EPILOG(pPatch, 2 + sizeof(RTRCPTR));
|
---|
[1] | 1303 | return rc;
|
---|
| 1304 | }
|
---|
| 1305 |
|
---|
[2043] | 1306 | /*
|
---|
| 1307 | * mov GPR, SS
|
---|
| 1308 | */
|
---|
[9228] | 1309 | int patmPatchGenMovFromSS(PVM pVM, PPATCHINFO pPatch, DISCPUSTATE *pCpu, RTRCPTR pCurInstrGC)
|
---|
[2043] | 1310 | {
|
---|
| 1311 | uint32_t size, offset;
|
---|
[1] | 1312 |
|
---|
[62652] | 1313 | Log(("patmPatchGenMovFromSS %RRv\n", pCurInstrGC)); RT_NOREF_PV(pCurInstrGC);
|
---|
[5285] | 1314 |
|
---|
[2047] | 1315 | Assert(pPatch->flags & PATMFL_CODE32);
|
---|
[2046] | 1316 |
|
---|
[54746] | 1317 | PATCHGEN_PROLOG(pVM, pPatch, g_patmClearPIFRecord.cbFunction + 2 + g_patmMovFromSSRecord.cbFunction + 2 + g_patmSetPIFRecord.cbFunction);
|
---|
[54687] | 1318 | size = patmPatchGenCode(pVM, pPatch, pPB, &g_patmClearPIFRecord, 0, false);
|
---|
[2043] | 1319 | PATCHGEN_EPILOG(pPatch, size);
|
---|
| 1320 |
|
---|
[2047] | 1321 | /* push ss */
|
---|
[54746] | 1322 | PATCHGEN_PROLOG_NODEF(pVM, pPatch, 2);
|
---|
[2047] | 1323 | offset = 0;
|
---|
[41734] | 1324 | if (pCpu->fPrefix & DISPREFIX_OPSIZE)
|
---|
[2047] | 1325 | pPB[offset++] = 0x66; /* size override -> 16 bits push */
|
---|
| 1326 | pPB[offset++] = 0x16;
|
---|
| 1327 | PATCHGEN_EPILOG(pPatch, offset);
|
---|
| 1328 |
|
---|
| 1329 | /* checks and corrects RPL of pushed ss*/
|
---|
[54746] | 1330 | PATCHGEN_PROLOG_NODEF(pVM, pPatch, g_patmMovFromSSRecord.cbFunction);
|
---|
[54687] | 1331 | size = patmPatchGenCode(pVM, pPatch, pPB, &g_patmMovFromSSRecord, 0, false);
|
---|
[2043] | 1332 | PATCHGEN_EPILOG(pPatch, size);
|
---|
| 1333 |
|
---|
| 1334 | /* pop general purpose register */
|
---|
[54746] | 1335 | PATCHGEN_PROLOG_NODEF(pVM, pPatch, 2);
|
---|
[2043] | 1336 | offset = 0;
|
---|
[41734] | 1337 | if (pCpu->fPrefix & DISPREFIX_OPSIZE)
|
---|
[2043] | 1338 | pPB[offset++] = 0x66; /* size override -> 16 bits pop */
|
---|
[41744] | 1339 | pPB[offset++] = 0x58 + pCpu->Param1.Base.idxGenReg;
|
---|
[2043] | 1340 | PATCHGEN_EPILOG(pPatch, offset);
|
---|
| 1341 |
|
---|
| 1342 |
|
---|
[54746] | 1343 | PATCHGEN_PROLOG_NODEF(pVM, pPatch, g_patmSetPIFRecord.cbFunction);
|
---|
[54687] | 1344 | size = patmPatchGenCode(pVM, pPatch, pPB, &g_patmSetPIFRecord, 0, false);
|
---|
[2043] | 1345 | PATCHGEN_EPILOG(pPatch, size);
|
---|
| 1346 |
|
---|
| 1347 | return VINF_SUCCESS;
|
---|
| 1348 | }
|
---|
| 1349 |
|
---|
| 1350 |
|
---|
[1] | 1351 | /**
|
---|
| 1352 | * Generate an sldt or str patch instruction
|
---|
| 1353 | *
|
---|
| 1354 | * @returns VBox status code.
|
---|
[58122] | 1355 | * @param pVM The cross context VM structure.
|
---|
[1] | 1356 | * @param pPatch Patch record
|
---|
| 1357 | * @param pCpu Disassembly state
|
---|
| 1358 | * @param pCurInstrGC Guest instruction address
|
---|
| 1359 | */
|
---|
[9228] | 1360 | int patmPatchGenSldtStr(PVM pVM, PPATCHINFO pPatch, DISCPUSTATE *pCpu, RTRCPTR pCurInstrGC)
|
---|
[1] | 1361 | {
|
---|
| 1362 | // sldt %Ew
|
---|
| 1363 | int rc = VINF_SUCCESS;
|
---|
| 1364 | uint32_t offset = 0;
|
---|
| 1365 | uint32_t i;
|
---|
| 1366 |
|
---|
| 1367 | /** @todo segment prefix (untested) */
|
---|
[41734] | 1368 | Assert(pCpu->fPrefix == DISPREFIX_NONE || pCpu->fPrefix == DISPREFIX_OPSIZE);
|
---|
[1] | 1369 |
|
---|
[54746] | 1370 | PATCHGEN_PROLOG(pVM, pPatch, PATCHGEN_DEF_SIZE);
|
---|
[1] | 1371 |
|
---|
[41739] | 1372 | if (pCpu->Param1.fUse == DISUSE_REG_GEN32 || pCpu->Param1.fUse == DISUSE_REG_GEN16)
|
---|
[1] | 1373 | {
|
---|
| 1374 | /* Register operand */
|
---|
| 1375 | // 8B 15 [32 bits addr] mov edx, CPUMCTX.tr/ldtr
|
---|
| 1376 |
|
---|
[41734] | 1377 | if (pCpu->fPrefix == DISPREFIX_OPSIZE)
|
---|
[1] | 1378 | pPB[offset++] = 0x66;
|
---|
| 1379 |
|
---|
| 1380 | pPB[offset++] = 0x8B; // mov destreg, CPUMCTX.tr/ldtr
|
---|
| 1381 | /* Modify REG part according to destination of original instruction */
|
---|
[41744] | 1382 | pPB[offset++] = MAKE_MODRM(0, pCpu->Param1.Base.idxGenReg, 5);
|
---|
[41737] | 1383 | if (pCpu->pCurInstr->uOpcode == OP_STR)
|
---|
[1] | 1384 | {
|
---|
[9228] | 1385 | *(RTRCPTR *)&pPB[offset] = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, tr);
|
---|
[1] | 1386 | }
|
---|
| 1387 | else
|
---|
| 1388 | {
|
---|
[9228] | 1389 | *(RTRCPTR *)&pPB[offset] = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, ldtr);
|
---|
[1] | 1390 | }
|
---|
| 1391 | patmPatchAddReloc32(pVM, pPatch, &pPB[offset], FIXUP_ABSOLUTE);
|
---|
[9228] | 1392 | offset += sizeof(RTRCPTR);
|
---|
[1] | 1393 | }
|
---|
| 1394 | else
|
---|
| 1395 | {
|
---|
| 1396 | /* Memory operand */
|
---|
| 1397 | //50 push eax
|
---|
| 1398 | //52 push edx
|
---|
| 1399 | //8D 15 48 7C 42 00 lea edx, dword ptr [dest]
|
---|
| 1400 | //66 A1 48 7C 42 00 mov ax, CPUMCTX.tr/ldtr
|
---|
| 1401 | //66 89 02 mov word ptr [edx],ax
|
---|
| 1402 | //5A pop edx
|
---|
| 1403 | //58 pop eax
|
---|
| 1404 |
|
---|
| 1405 | pPB[offset++] = 0x50; // push eax
|
---|
| 1406 | pPB[offset++] = 0x52; // push edx
|
---|
| 1407 |
|
---|
[41734] | 1408 | if (pCpu->fPrefix == DISPREFIX_SEG)
|
---|
[1] | 1409 | {
|
---|
[1465] | 1410 | pPB[offset++] = DISQuerySegPrefixByte(pCpu);
|
---|
[1] | 1411 | }
|
---|
| 1412 | pPB[offset++] = 0x8D; // lea edx, dword ptr [dest]
|
---|
| 1413 | // duplicate and modify modrm byte and additional bytes if present (e.g. direct address)
|
---|
[41727] | 1414 | pPB[offset++] = MAKE_MODRM(pCpu->ModRM.Bits.Mod, DISGREG_EDX , pCpu->ModRM.Bits.Rm);
|
---|
[1] | 1415 |
|
---|
| 1416 | i = 3; /* standard offset of modrm bytes */
|
---|
[41734] | 1417 | if (pCpu->fPrefix == DISPREFIX_OPSIZE)
|
---|
[1] | 1418 | i++; //skip operand prefix
|
---|
[41734] | 1419 | if (pCpu->fPrefix == DISPREFIX_SEG)
|
---|
[1] | 1420 | i++; //skip segment prefix
|
---|
| 1421 |
|
---|
[41732] | 1422 | rc = patmPatchReadBytes(pVM, &pPB[offset], (RTRCPTR)((RTGCUINTPTR32)pCurInstrGC + i), pCpu->cbInstr - i);
|
---|
[1] | 1423 | AssertRCReturn(rc, rc);
|
---|
[41732] | 1424 | offset += (pCpu->cbInstr - i);
|
---|
[1] | 1425 |
|
---|
| 1426 | pPB[offset++] = 0x66; // mov ax, CPUMCTX.tr/ldtr
|
---|
| 1427 | pPB[offset++] = 0xA1;
|
---|
[41737] | 1428 | if (pCpu->pCurInstr->uOpcode == OP_STR)
|
---|
[1] | 1429 | {
|
---|
[9228] | 1430 | *(RTRCPTR *)&pPB[offset] = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, tr);
|
---|
[1] | 1431 | }
|
---|
| 1432 | else
|
---|
| 1433 | {
|
---|
[9228] | 1434 | *(RTRCPTR *)&pPB[offset] = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, ldtr);
|
---|
[1] | 1435 | }
|
---|
| 1436 | patmPatchAddReloc32(pVM, pPatch, &pPB[offset], FIXUP_ABSOLUTE);
|
---|
[9228] | 1437 | offset += sizeof(RTRCPTR);
|
---|
[1] | 1438 |
|
---|
| 1439 | pPB[offset++] = 0x66; // mov word ptr [edx],ax
|
---|
| 1440 | pPB[offset++] = 0x89;
|
---|
| 1441 | pPB[offset++] = 0x02;
|
---|
| 1442 |
|
---|
| 1443 | pPB[offset++] = 0x5A; // pop edx
|
---|
| 1444 | pPB[offset++] = 0x58; // pop eax
|
---|
| 1445 | }
|
---|
| 1446 |
|
---|
| 1447 | PATCHGEN_EPILOG(pPatch, offset);
|
---|
| 1448 |
|
---|
| 1449 | return rc;
|
---|
| 1450 | }
|
---|
| 1451 |
|
---|
| 1452 | /**
|
---|
| 1453 | * Generate an sgdt or sidt patch instruction
|
---|
| 1454 | *
|
---|
| 1455 | * @returns VBox status code.
|
---|
[58122] | 1456 | * @param pVM The cross context VM structure.
|
---|
[1] | 1457 | * @param pPatch Patch record
|
---|
| 1458 | * @param pCpu Disassembly state
|
---|
| 1459 | * @param pCurInstrGC Guest instruction address
|
---|
| 1460 | */
|
---|
[9228] | 1461 | int patmPatchGenSxDT(PVM pVM, PPATCHINFO pPatch, DISCPUSTATE *pCpu, RTRCPTR pCurInstrGC)
|
---|
[1] | 1462 | {
|
---|
| 1463 | int rc = VINF_SUCCESS;
|
---|
| 1464 | uint32_t offset = 0, offset_base, offset_limit;
|
---|
| 1465 | uint32_t i;
|
---|
| 1466 |
|
---|
[63560] | 1467 | /** @todo segment prefix (untested) */
|
---|
[41734] | 1468 | Assert(pCpu->fPrefix == DISPREFIX_NONE);
|
---|
[1] | 1469 |
|
---|
| 1470 | // sgdt %Ms
|
---|
| 1471 | // sidt %Ms
|
---|
| 1472 |
|
---|
[41737] | 1473 | switch (pCpu->pCurInstr->uOpcode)
|
---|
[1] | 1474 | {
|
---|
| 1475 | case OP_SGDT:
|
---|
| 1476 | offset_base = RT_OFFSETOF(CPUMCTX, gdtr.pGdt);
|
---|
| 1477 | offset_limit = RT_OFFSETOF(CPUMCTX, gdtr.cbGdt);
|
---|
| 1478 | break;
|
---|
| 1479 |
|
---|
| 1480 | case OP_SIDT:
|
---|
| 1481 | offset_base = RT_OFFSETOF(CPUMCTX, idtr.pIdt);
|
---|
| 1482 | offset_limit = RT_OFFSETOF(CPUMCTX, idtr.cbIdt);
|
---|
| 1483 | break;
|
---|
| 1484 |
|
---|
| 1485 | default:
|
---|
| 1486 | return VERR_INVALID_PARAMETER;
|
---|
| 1487 | }
|
---|
| 1488 |
|
---|
| 1489 | //50 push eax
|
---|
| 1490 | //52 push edx
|
---|
| 1491 | //8D 15 48 7C 42 00 lea edx, dword ptr [dest]
|
---|
| 1492 | //66 A1 48 7C 42 00 mov ax, CPUMCTX.gdtr.limit
|
---|
| 1493 | //66 89 02 mov word ptr [edx],ax
|
---|
| 1494 | //A1 48 7C 42 00 mov eax, CPUMCTX.gdtr.base
|
---|
| 1495 | //89 42 02 mov dword ptr [edx+2],eax
|
---|
| 1496 | //5A pop edx
|
---|
| 1497 | //58 pop eax
|
---|
| 1498 |
|
---|
[54746] | 1499 | PATCHGEN_PROLOG(pVM, pPatch, PATCHGEN_DEF_SIZE);
|
---|
[1] | 1500 | pPB[offset++] = 0x50; // push eax
|
---|
| 1501 | pPB[offset++] = 0x52; // push edx
|
---|
| 1502 |
|
---|
[41734] | 1503 | if (pCpu->fPrefix == DISPREFIX_SEG)
|
---|
[1] | 1504 | {
|
---|
[1465] | 1505 | pPB[offset++] = DISQuerySegPrefixByte(pCpu);
|
---|
[1] | 1506 | }
|
---|
| 1507 | pPB[offset++] = 0x8D; // lea edx, dword ptr [dest]
|
---|
| 1508 | // duplicate and modify modrm byte and additional bytes if present (e.g. direct address)
|
---|
[41727] | 1509 | pPB[offset++] = MAKE_MODRM(pCpu->ModRM.Bits.Mod, DISGREG_EDX , pCpu->ModRM.Bits.Rm);
|
---|
[1] | 1510 |
|
---|
| 1511 | i = 3; /* standard offset of modrm bytes */
|
---|
[41734] | 1512 | if (pCpu->fPrefix == DISPREFIX_OPSIZE)
|
---|
[1] | 1513 | i++; //skip operand prefix
|
---|
[41734] | 1514 | if (pCpu->fPrefix == DISPREFIX_SEG)
|
---|
[1] | 1515 | i++; //skip segment prefix
|
---|
[41732] | 1516 | rc = patmPatchReadBytes(pVM, &pPB[offset], (RTRCPTR)((RTGCUINTPTR32)pCurInstrGC + i), pCpu->cbInstr - i);
|
---|
[1] | 1517 | AssertRCReturn(rc, rc);
|
---|
[41732] | 1518 | offset += (pCpu->cbInstr - i);
|
---|
[1] | 1519 |
|
---|
| 1520 | pPB[offset++] = 0x66; // mov ax, CPUMCTX.gdtr.limit
|
---|
| 1521 | pPB[offset++] = 0xA1;
|
---|
[9228] | 1522 | *(RTRCPTR *)&pPB[offset] = pVM->patm.s.pCPUMCtxGC + offset_limit;
|
---|
[1] | 1523 | patmPatchAddReloc32(pVM, pPatch, &pPB[offset], FIXUP_ABSOLUTE);
|
---|
[9228] | 1524 | offset += sizeof(RTRCPTR);
|
---|
[1] | 1525 |
|
---|
| 1526 | pPB[offset++] = 0x66; // mov word ptr [edx],ax
|
---|
| 1527 | pPB[offset++] = 0x89;
|
---|
| 1528 | pPB[offset++] = 0x02;
|
---|
| 1529 |
|
---|
| 1530 | pPB[offset++] = 0xA1; // mov eax, CPUMCTX.gdtr.base
|
---|
[9228] | 1531 | *(RTRCPTR *)&pPB[offset] = pVM->patm.s.pCPUMCtxGC + offset_base;
|
---|
[1] | 1532 | patmPatchAddReloc32(pVM, pPatch, &pPB[offset], FIXUP_ABSOLUTE);
|
---|
[9228] | 1533 | offset += sizeof(RTRCPTR);
|
---|
[1] | 1534 |
|
---|
| 1535 | pPB[offset++] = 0x89; // mov dword ptr [edx+2],eax
|
---|
| 1536 | pPB[offset++] = 0x42;
|
---|
| 1537 | pPB[offset++] = 0x02;
|
---|
| 1538 |
|
---|
| 1539 | pPB[offset++] = 0x5A; // pop edx
|
---|
| 1540 | pPB[offset++] = 0x58; // pop eax
|
---|
| 1541 |
|
---|
| 1542 | PATCHGEN_EPILOG(pPatch, offset);
|
---|
| 1543 |
|
---|
| 1544 | return rc;
|
---|
| 1545 | }
|
---|
| 1546 |
|
---|
| 1547 | /**
|
---|
| 1548 | * Generate a cpuid patch instruction
|
---|
| 1549 | *
|
---|
| 1550 | * @returns VBox status code.
|
---|
[58122] | 1551 | * @param pVM The cross context VM structure.
|
---|
[1] | 1552 | * @param pPatch Patch record
|
---|
| 1553 | * @param pCurInstrGC Guest instruction address
|
---|
| 1554 | */
|
---|
[9228] | 1555 | int patmPatchGenCpuid(PVM pVM, PPATCHINFO pPatch, RTRCPTR pCurInstrGC)
|
---|
[1] | 1556 | {
|
---|
| 1557 | uint32_t size;
|
---|
[54746] | 1558 | PATCHGEN_PROLOG(pVM, pPatch, g_patmCpuidRecord.cbFunction);
|
---|
[1] | 1559 |
|
---|
[54687] | 1560 | size = patmPatchGenCode(pVM, pPatch, pPB, &g_patmCpuidRecord, 0, false);
|
---|
[1] | 1561 |
|
---|
| 1562 | PATCHGEN_EPILOG(pPatch, size);
|
---|
[39078] | 1563 | NOREF(pCurInstrGC);
|
---|
[1] | 1564 | return VINF_SUCCESS;
|
---|
| 1565 | }
|
---|
| 1566 |
|
---|
| 1567 | /**
|
---|
| 1568 | * Generate the jump from guest to patch code
|
---|
| 1569 | *
|
---|
| 1570 | * @returns VBox status code.
|
---|
[58126] | 1571 | * @param pVM The cross context VM structure.
|
---|
| 1572 | * @param pPatch Patch record
|
---|
| 1573 | * @param pReturnAddrGC Guest code target of the jump.
|
---|
[1] | 1574 | * @param fClearInhibitIRQs Clear inhibit irq flag
|
---|
| 1575 | */
|
---|
[9212] | 1576 | int patmPatchGenJumpToGuest(PVM pVM, PPATCHINFO pPatch, RCPTRTYPE(uint8_t *) pReturnAddrGC, bool fClearInhibitIRQs)
|
---|
[1] | 1577 | {
|
---|
| 1578 | int rc = VINF_SUCCESS;
|
---|
| 1579 | uint32_t size;
|
---|
| 1580 |
|
---|
| 1581 | if (fClearInhibitIRQs)
|
---|
| 1582 | {
|
---|
| 1583 | rc = patmPatchGenClearInhibitIRQ(pVM, pPatch, pReturnAddrGC);
|
---|
| 1584 | if (rc == VERR_NO_MEMORY)
|
---|
| 1585 | return rc;
|
---|
| 1586 | AssertRCReturn(rc, rc);
|
---|
| 1587 | }
|
---|
| 1588 |
|
---|
[54746] | 1589 | PATCHGEN_PROLOG(pVM, pPatch, PATMJumpToGuest_IF1Record.cbFunction);
|
---|
[1] | 1590 |
|
---|
| 1591 | /* Add lookup record for patch to guest address translation */
|
---|
[44362] | 1592 | patmR3AddP2GLookupRecord(pVM, pPatch, pPB, pReturnAddrGC, PATM_LOOKUP_PATCH2GUEST);
|
---|
[1] | 1593 |
|
---|
| 1594 | /* Generate code to jump to guest code if IF=1, else fault. */
|
---|
| 1595 | size = patmPatchGenCode(pVM, pPatch, pPB, &PATMJumpToGuest_IF1Record, pReturnAddrGC, true);
|
---|
| 1596 | PATCHGEN_EPILOG(pPatch, size);
|
---|
| 1597 |
|
---|
| 1598 | return rc;
|
---|
| 1599 | }
|
---|
| 1600 |
|
---|
| 1601 | /*
|
---|
| 1602 | * Relative jump from patch code to patch code (no fixup required)
|
---|
| 1603 | */
|
---|
[9228] | 1604 | int patmPatchGenPatchJump(PVM pVM, PPATCHINFO pPatch, RTRCPTR pCurInstrGC, RCPTRTYPE(uint8_t *) pPatchAddrGC, bool fAddLookupRecord)
|
---|
[1] | 1605 | {
|
---|
| 1606 | int32_t displ;
|
---|
| 1607 | int rc = VINF_SUCCESS;
|
---|
| 1608 |
|
---|
| 1609 | Assert(PATMIsPatchGCAddr(pVM, pPatchAddrGC));
|
---|
[54746] | 1610 | PATCHGEN_PROLOG(pVM, pPatch, SIZEOF_NEARJUMP32);
|
---|
[1] | 1611 |
|
---|
[2030] | 1612 | if (fAddLookupRecord)
|
---|
| 1613 | {
|
---|
| 1614 | /* Add lookup record for patch to guest address translation */
|
---|
[44362] | 1615 | patmR3AddP2GLookupRecord(pVM, pPatch, pPB, pCurInstrGC, PATM_LOOKUP_PATCH2GUEST);
|
---|
[2030] | 1616 | }
|
---|
[1] | 1617 |
|
---|
| 1618 | pPB[0] = 0xE9; //JMP
|
---|
| 1619 |
|
---|
| 1620 | displ = pPatchAddrGC - (PATCHCODE_PTR_GC(pPatch) + pPatch->uCurPatchOffset + SIZEOF_NEARJUMP32);
|
---|
| 1621 |
|
---|
| 1622 | *(uint32_t *)&pPB[1] = displ;
|
---|
| 1623 |
|
---|
| 1624 | PATCHGEN_EPILOG(pPatch, SIZEOF_NEARJUMP32);
|
---|
| 1625 |
|
---|
| 1626 | return rc;
|
---|
| 1627 | }
|
---|