VirtualBox

source: vbox/trunk/src/VBox/VMM/VMMR3/PATMSSM.cpp@ 36847

Last change on this file since 36847 was 36669, checked in by vboxsync, 14 years ago

PATM: Record trampoline patches in the target to update the displacement on a patch refresh. (see xTracker #5593 for further information)
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1/* $Id: PATMSSM.cpp 36669 2011-04-14 12:21:43Z vboxsync $ */
2/** @file
3 * PATMSSM - Dynamic Guest OS Patching Manager; Save and load state
4 *
5 * NOTE: CSAM assumes patch memory is never reused!!
6 */
7
8/*
9 * Copyright (C) 2006-2007 Oracle Corporation
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
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.
18 */
19
20/*******************************************************************************
21* Header Files *
22*******************************************************************************/
23#define LOG_GROUP LOG_GROUP_PATM
24#include <VBox/vmm/patm.h>
25#include <VBox/vmm/cpum.h>
26#include <VBox/vmm/mm.h>
27#include <VBox/vmm/ssm.h>
28#include <VBox/param.h>
29#include <iprt/avl.h>
30#include "PATMInternal.h"
31#include "PATMPatch.h"
32#include "PATMA.h"
33#include <VBox/vmm/vm.h>
34#include <VBox/vmm/csam.h>
35#include "internal/pgm.h"
36#include <VBox/dbg.h>
37#include <VBox/err.h>
38#include <VBox/log.h>
39#include <iprt/assert.h>
40#include <iprt/asm.h>
41#include <iprt/string.h>
42#include <VBox/dis.h>
43#include <VBox/disopcode.h>
44
45/**
46 * Patch information - SSM version.
47 *
48 * the difference is the missing pTrampolinePatchesHead member
49 * to avoid changing the saved state version for now (will come later).
50 */
51typedef struct _PATCHINFOSSM
52{
53 uint32_t uState;
54 uint32_t uOldState;
55 DISCPUMODE uOpMode;
56
57 /* GC pointer of privileged instruction */
58 RCPTRTYPE(uint8_t *) pPrivInstrGC;
59 R3PTRTYPE(uint8_t *) unusedHC; /* todo Can't remove due to structure size dependencies in saved states. */
60 uint8_t aPrivInstr[MAX_INSTR_SIZE];
61 uint32_t cbPrivInstr;
62 uint32_t opcode; //opcode for priv instr (OP_*)
63 uint32_t cbPatchJump; //patch jump size
64
65 /* Only valid for PATMFL_JUMP_CONFLICT patches */
66 RTRCPTR pPatchJumpDestGC;
67
68 RTGCUINTPTR32 pPatchBlockOffset;
69 uint32_t cbPatchBlockSize;
70 uint32_t uCurPatchOffset;
71#if HC_ARCH_BITS == 64
72 uint32_t Alignment0; /**< Align flags correctly. */
73#endif
74
75 uint64_t flags;
76
77 /**
78 * Lowest and highest patched GC instruction address. To optimize searches.
79 */
80 RTRCPTR pInstrGCLowest;
81 RTRCPTR pInstrGCHighest;
82
83 /* Tree of fixup records for the patch. */
84 R3PTRTYPE(PAVLPVNODECORE) FixupTree;
85 uint32_t nrFixups;
86
87 /* Tree of jumps inside the generated patch code. */
88 uint32_t nrJumpRecs;
89 R3PTRTYPE(PAVLPVNODECORE) JumpTree;
90
91 /**
92 * Lookup trees for determining the corresponding guest address of an
93 * instruction in the patch block.
94 */
95 R3PTRTYPE(PAVLU32NODECORE) Patch2GuestAddrTree;
96 R3PTRTYPE(PAVLU32NODECORE) Guest2PatchAddrTree;
97 uint32_t nrPatch2GuestRecs;
98#if HC_ARCH_BITS == 64
99 uint32_t Alignment1;
100#endif
101
102 /* Unused, but can't remove due to structure size dependencies in the saved state. */
103 PATMP2GLOOKUPREC_OBSOLETE unused;
104
105 /* Temporary information during patch creation. Don't waste hypervisor memory for this. */
106 R3PTRTYPE(PPATCHINFOTEMP) pTempInfo;
107
108 /* Count the number of writes to the corresponding guest code. */
109 uint32_t cCodeWrites;
110
111 /* Count the number of invalid writes to pages monitored for the patch. */
112 //some statistics to determine if we should keep this patch activated
113 uint32_t cTraps;
114
115 uint32_t cInvalidWrites;
116
117 // Index into the uPatchRun and uPatchTrap arrays (0..MAX_PATCHES-1)
118 uint32_t uPatchIdx;
119
120 /* First opcode byte, that's overwritten when a patch is marked dirty. */
121 uint8_t bDirtyOpcode;
122 uint8_t Alignment2[7]; /**< Align the structure size on a 8-byte boundary. */
123} PATCHINFOSSM, *PPATCHINFOSSM;
124
125/**
126 * Lookup record for patches - SSM version.
127 */
128typedef struct PATMPATCHRECSSM
129{
130 /** The key is a GC virtual address. */
131 AVLOU32NODECORE Core;
132 /** The key is a patch offset. */
133 AVLOU32NODECORE CoreOffset;
134
135 PATCHINFOSSM patch;
136} PATMPATCHRECSSM, *PPATMPATCHRECSSM;
137
138/*******************************************************************************
139* Defined Constants And Macros *
140*******************************************************************************/
141#define PATM_SUBTRACT_PTR(a, b) *(uintptr_t *)&(a) = (uintptr_t)(a) - (uintptr_t)(b)
142#define PATM_ADD_PTR(a, b) *(uintptr_t *)&(a) = (uintptr_t)(a) + (uintptr_t)(b)
143
144/*******************************************************************************
145* Internal Functions *
146*******************************************************************************/
147static void patmCorrectFixup(PVM pVM, unsigned ulSSMVersion, PATM &patmInfo, PPATCHINFO pPatch, PRELOCREC pRec, int32_t offset, RTRCPTR *pFixup);
148
149/*******************************************************************************
150* Global Variables *
151*******************************************************************************/
152/**
153 * SSM descriptor table for the PATM structure.
154 */
155static SSMFIELD const g_aPatmFields[] =
156{
157 /** @todo there are a bunch more fields here which can be marked as ignored. */
158 SSMFIELD_ENTRY_IGNORE( PATM, offVM),
159 SSMFIELD_ENTRY_RCPTR( PATM, pPatchMemGC),
160 SSMFIELD_ENTRY_IGN_HCPTR( PATM, pPatchMemHC),
161 SSMFIELD_ENTRY( PATM, cbPatchMem),
162 SSMFIELD_ENTRY( PATM, offPatchMem),
163 SSMFIELD_ENTRY( PATM, fOutOfMemory),
164 SSMFIELD_ENTRY_PAD_HC_AUTO( 3, 3),
165 SSMFIELD_ENTRY( PATM, deltaReloc),
166 SSMFIELD_ENTRY_IGN_HCPTR( PATM, pGCStateHC),
167 SSMFIELD_ENTRY_RCPTR( PATM, pGCStateGC),
168 SSMFIELD_ENTRY_RCPTR( PATM, pGCStackGC),
169 SSMFIELD_ENTRY_IGN_HCPTR( PATM, pGCStackHC),
170 SSMFIELD_ENTRY_RCPTR( PATM, pCPUMCtxGC),
171 SSMFIELD_ENTRY_RCPTR( PATM, pStatsGC),
172 SSMFIELD_ENTRY_IGN_HCPTR( PATM, pStatsHC),
173 SSMFIELD_ENTRY( PATM, uCurrentPatchIdx),
174 SSMFIELD_ENTRY( PATM, ulCallDepth),
175 SSMFIELD_ENTRY( PATM, cPageRecords),
176 SSMFIELD_ENTRY_RCPTR( PATM, pPatchedInstrGCLowest),
177 SSMFIELD_ENTRY_RCPTR( PATM, pPatchedInstrGCHighest),
178 SSMFIELD_ENTRY_RCPTR( PATM, PatchLookupTreeGC),
179 SSMFIELD_ENTRY_IGN_HCPTR( PATM, PatchLookupTreeHC),
180 SSMFIELD_ENTRY_RCPTR( PATM, pfnHelperCallGC),
181 SSMFIELD_ENTRY_RCPTR( PATM, pfnHelperRetGC),
182 SSMFIELD_ENTRY_RCPTR( PATM, pfnHelperJumpGC),
183 SSMFIELD_ENTRY_RCPTR( PATM, pfnHelperIretGC),
184 SSMFIELD_ENTRY_IGN_HCPTR( PATM, pGlobalPatchRec),
185 SSMFIELD_ENTRY_RCPTR( PATM, pfnSysEnterGC),
186 SSMFIELD_ENTRY_RCPTR( PATM, pfnSysEnterPatchGC),
187 SSMFIELD_ENTRY( PATM, uSysEnterPatchIdx),
188 SSMFIELD_ENTRY_RCPTR( PATM, pvFaultMonitor),
189 SSMFIELD_ENTRY_GCPHYS( PATM, mmio.GCPhys),
190 SSMFIELD_ENTRY_RCPTR( PATM, mmio.pCachedData),
191 SSMFIELD_ENTRY_IGN_RCPTR( PATM, mmio.Alignment0),
192 SSMFIELD_ENTRY_IGN_HCPTR( PATM, savedstate.pSSM),
193 SSMFIELD_ENTRY( PATM, savedstate.cPatches),
194 SSMFIELD_ENTRY_PAD_HC64( PATM, savedstate.Alignment0, sizeof(uint32_t)),
195 SSMFIELD_ENTRY_IGNORE( PATM, StatNrOpcodeRead),
196 SSMFIELD_ENTRY_IGNORE( PATM, StatDisabled),
197 SSMFIELD_ENTRY_IGNORE( PATM, StatUnusable),
198 SSMFIELD_ENTRY_IGNORE( PATM, StatEnabled),
199 SSMFIELD_ENTRY_IGNORE( PATM, StatInstalled),
200 SSMFIELD_ENTRY_IGNORE( PATM, StatInstalledFunctionPatches),
201 SSMFIELD_ENTRY_IGNORE( PATM, StatInstalledTrampoline),
202 SSMFIELD_ENTRY_IGNORE( PATM, StatInstalledJump),
203 SSMFIELD_ENTRY_IGNORE( PATM, StatInt3Callable),
204 SSMFIELD_ENTRY_IGNORE( PATM, StatInt3BlockRun),
205 SSMFIELD_ENTRY_IGNORE( PATM, StatOverwritten),
206 SSMFIELD_ENTRY_IGNORE( PATM, StatFixedConflicts),
207 SSMFIELD_ENTRY_IGNORE( PATM, StatFlushed),
208 SSMFIELD_ENTRY_IGNORE( PATM, StatPageBoundaryCrossed),
209 SSMFIELD_ENTRY_IGNORE( PATM, StatMonitored),
210 SSMFIELD_ENTRY_IGNORE( PATM, StatHandleTrap),
211 SSMFIELD_ENTRY_IGNORE( PATM, StatSwitchBack),
212 SSMFIELD_ENTRY_IGNORE( PATM, StatSwitchBackFail),
213 SSMFIELD_ENTRY_IGNORE( PATM, StatPATMMemoryUsed),
214 SSMFIELD_ENTRY_IGNORE( PATM, StatDuplicateREQSuccess),
215 SSMFIELD_ENTRY_IGNORE( PATM, StatDuplicateREQFailed),
216 SSMFIELD_ENTRY_IGNORE( PATM, StatDuplicateUseExisting),
217 SSMFIELD_ENTRY_IGNORE( PATM, StatFunctionFound),
218 SSMFIELD_ENTRY_IGNORE( PATM, StatFunctionNotFound),
219 SSMFIELD_ENTRY_IGNORE( PATM, StatPatchWrite),
220 SSMFIELD_ENTRY_IGNORE( PATM, StatPatchWriteDetect),
221 SSMFIELD_ENTRY_IGNORE( PATM, StatDirty),
222 SSMFIELD_ENTRY_IGNORE( PATM, StatPushTrap),
223 SSMFIELD_ENTRY_IGNORE( PATM, StatPatchWriteInterpreted),
224 SSMFIELD_ENTRY_IGNORE( PATM, StatPatchWriteInterpretedFailed),
225 SSMFIELD_ENTRY_IGNORE( PATM, StatSysEnter),
226 SSMFIELD_ENTRY_IGNORE( PATM, StatSysExit),
227 SSMFIELD_ENTRY_IGNORE( PATM, StatEmulIret),
228 SSMFIELD_ENTRY_IGNORE( PATM, StatEmulIretFailed),
229 SSMFIELD_ENTRY_IGNORE( PATM, StatInstrDirty),
230 SSMFIELD_ENTRY_IGNORE( PATM, StatInstrDirtyGood),
231 SSMFIELD_ENTRY_IGNORE( PATM, StatInstrDirtyBad),
232 SSMFIELD_ENTRY_IGNORE( PATM, StatPatchPageInserted),
233 SSMFIELD_ENTRY_IGNORE( PATM, StatPatchPageRemoved),
234 SSMFIELD_ENTRY_IGNORE( PATM, StatPatchRefreshSuccess),
235 SSMFIELD_ENTRY_IGNORE( PATM, StatPatchRefreshFailed),
236 SSMFIELD_ENTRY_IGNORE( PATM, StatGenRet),
237 SSMFIELD_ENTRY_IGNORE( PATM, StatGenRetReused),
238 SSMFIELD_ENTRY_IGNORE( PATM, StatGenJump),
239 SSMFIELD_ENTRY_IGNORE( PATM, StatGenCall),
240 SSMFIELD_ENTRY_IGNORE( PATM, StatGenPopf),
241 SSMFIELD_ENTRY_IGNORE( PATM, StatCheckPendingIRQ),
242 SSMFIELD_ENTRY_IGNORE( PATM, StatFunctionLookupReplace),
243 SSMFIELD_ENTRY_IGNORE( PATM, StatFunctionLookupInsert),
244 SSMFIELD_ENTRY_IGNORE( PATM, StatU32FunctionMaxSlotsUsed),
245 SSMFIELD_ENTRY_IGNORE( PATM, Alignment0),
246 SSMFIELD_ENTRY_TERM()
247};
248
249/**
250 * SSM descriptor table for the PATMGCSTATE structure.
251 */
252static SSMFIELD const g_aPatmGCStateFields[] =
253{
254 SSMFIELD_ENTRY( PATMGCSTATE, uVMFlags),
255 SSMFIELD_ENTRY( PATMGCSTATE, uPendingAction),
256 SSMFIELD_ENTRY( PATMGCSTATE, uPatchCalls),
257 SSMFIELD_ENTRY( PATMGCSTATE, uScratch),
258 SSMFIELD_ENTRY( PATMGCSTATE, uIretEFlags),
259 SSMFIELD_ENTRY( PATMGCSTATE, uIretCS),
260 SSMFIELD_ENTRY( PATMGCSTATE, uIretEIP),
261 SSMFIELD_ENTRY( PATMGCSTATE, Psp),
262 SSMFIELD_ENTRY( PATMGCSTATE, fPIF),
263 SSMFIELD_ENTRY_RCPTR( PATMGCSTATE, GCPtrInhibitInterrupts),
264 SSMFIELD_ENTRY_RCPTR( PATMGCSTATE, GCCallPatchTargetAddr),
265 SSMFIELD_ENTRY_RCPTR( PATMGCSTATE, GCCallReturnAddr),
266 SSMFIELD_ENTRY( PATMGCSTATE, Restore.uEAX),
267 SSMFIELD_ENTRY( PATMGCSTATE, Restore.uECX),
268 SSMFIELD_ENTRY( PATMGCSTATE, Restore.uEDI),
269 SSMFIELD_ENTRY( PATMGCSTATE, Restore.eFlags),
270 SSMFIELD_ENTRY( PATMGCSTATE, Restore.uFlags),
271 SSMFIELD_ENTRY_TERM()
272};
273
274/**
275 * SSM descriptor table for the PATMPATCHREC structure.
276 */
277static SSMFIELD const g_aPatmPatchRecFields[] =
278{
279 SSMFIELD_ENTRY( PATMPATCHRECSSM, Core.Key),
280 SSMFIELD_ENTRY_IGNORE( PATMPATCHRECSSM, Core.pLeft),
281 SSMFIELD_ENTRY_IGNORE( PATMPATCHRECSSM, Core.pRight),
282 SSMFIELD_ENTRY_IGNORE( PATMPATCHRECSSM, Core.uchHeight),
283 SSMFIELD_ENTRY_PAD_HC_AUTO( 3, 3),
284 SSMFIELD_ENTRY( PATMPATCHRECSSM, CoreOffset.Key),
285 SSMFIELD_ENTRY_IGNORE( PATMPATCHRECSSM, CoreOffset.pLeft),
286 SSMFIELD_ENTRY_IGNORE( PATMPATCHRECSSM, CoreOffset.pRight),
287 SSMFIELD_ENTRY_IGNORE( PATMPATCHRECSSM, CoreOffset.uchHeight),
288 SSMFIELD_ENTRY_PAD_HC_AUTO( 3, 3),
289 SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.uState),
290 SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.uOldState),
291 SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.uOpMode),
292 SSMFIELD_ENTRY_RCPTR( PATMPATCHRECSSM, patch.pPrivInstrGC),
293 SSMFIELD_ENTRY_IGN_HCPTR( PATMPATCHRECSSM, patch.unusedHC),
294 SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.aPrivInstr),
295 SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.cbPrivInstr),
296 SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.opcode),
297 SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.cbPatchJump),
298 SSMFIELD_ENTRY_RCPTR( PATMPATCHRECSSM, patch.pPatchJumpDestGC),
299 SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.pPatchBlockOffset),
300 SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.cbPatchBlockSize),
301 SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.uCurPatchOffset),
302 SSMFIELD_ENTRY_PAD_HC64( PATMPATCHRECSSM, patch.Alignment0, sizeof(uint32_t)),
303 SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.flags),
304 SSMFIELD_ENTRY_RCPTR( PATMPATCHRECSSM, patch.pInstrGCLowest),
305 SSMFIELD_ENTRY_RCPTR( PATMPATCHRECSSM, patch.pInstrGCHighest),
306 SSMFIELD_ENTRY_IGN_HCPTR( PATMPATCHRECSSM, patch.FixupTree),
307 SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.nrFixups),
308 SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.nrJumpRecs), // should be zero?
309 SSMFIELD_ENTRY_IGN_HCPTR( PATMPATCHRECSSM, patch.JumpTree),
310 SSMFIELD_ENTRY_IGN_HCPTR( PATMPATCHRECSSM, patch.Patch2GuestAddrTree),
311 SSMFIELD_ENTRY_IGN_HCPTR( PATMPATCHRECSSM, patch.Guest2PatchAddrTree),
312 SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.nrPatch2GuestRecs),
313 SSMFIELD_ENTRY_PAD_HC64( PATMPATCHRECSSM, patch.Alignment1, sizeof(uint32_t)),
314 SSMFIELD_ENTRY_IGN_HCPTR( PATMPATCHRECSSM, patch.unused.pPatchLocStartHC), // saved as zero
315 SSMFIELD_ENTRY_IGN_HCPTR( PATMPATCHRECSSM, patch.unused.pPatchLocEndHC), // ditto
316 SSMFIELD_ENTRY_IGN_RCPTR( PATMPATCHRECSSM, patch.unused.pGuestLoc), // ditto
317 SSMFIELD_ENTRY_IGNORE( PATMPATCHRECSSM, patch.unused.opsize), // ditto
318 SSMFIELD_ENTRY_IGN_HCPTR( PATMPATCHRECSSM, patch.pTempInfo),
319 SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.cCodeWrites),
320 SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.cTraps),
321 SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.cInvalidWrites),
322 SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.uPatchIdx),
323 SSMFIELD_ENTRY( PATMPATCHRECSSM, patch.bDirtyOpcode),
324 SSMFIELD_ENTRY_IGNORE( PATMPATCHRECSSM, patch.Alignment2),
325 SSMFIELD_ENTRY_TERM()
326};
327
328/**
329 * SSM descriptor table for the RELOCREC structure.
330 */
331static SSMFIELD const g_aPatmRelocRec[] =
332{
333 SSMFIELD_ENTRY_HCPTR_HACK_U32( RELOCREC, Core.Key), // Used to store the relocation type
334 SSMFIELD_ENTRY_IGN_HCPTR( RELOCREC, Core.pLeft),
335 SSMFIELD_ENTRY_IGN_HCPTR( RELOCREC, Core.pRight),
336 SSMFIELD_ENTRY_IGNORE( RELOCREC, Core.uchHeight),
337 SSMFIELD_ENTRY_PAD_HC_AUTO( 3, 7),
338 SSMFIELD_ENTRY( RELOCREC, uType),
339 SSMFIELD_ENTRY_PAD_HC_AUTO( 0, 4),
340 SSMFIELD_ENTRY_HCPTR_HACK_U32( RELOCREC, pRelocPos), // converted to a patch member offset.
341 SSMFIELD_ENTRY_RCPTR( RELOCREC, pSource),
342 SSMFIELD_ENTRY_RCPTR( RELOCREC, pDest),
343 SSMFIELD_ENTRY_TERM()
344};
345
346/**
347 * SSM descriptor table for the RECPATCHTOGUEST structure.
348 */
349static SSMFIELD const g_aPatmRecPatchToGuest[] =
350{
351 SSMFIELD_ENTRY( RECPATCHTOGUEST, Core.Key),
352 SSMFIELD_ENTRY_PAD_HC_AUTO( 0, 4),
353 SSMFIELD_ENTRY_IGN_HCPTR( RECPATCHTOGUEST, Core.pLeft),
354 SSMFIELD_ENTRY_IGN_HCPTR( RECPATCHTOGUEST, Core.pRight),
355 SSMFIELD_ENTRY_IGNORE( RECPATCHTOGUEST, Core.uchHeight),
356 SSMFIELD_ENTRY_PAD_HC_AUTO( 3, 7),
357 SSMFIELD_ENTRY_RCPTR( RECPATCHTOGUEST, pOrgInstrGC),
358 SSMFIELD_ENTRY( RECPATCHTOGUEST, enmType),
359 SSMFIELD_ENTRY( RECPATCHTOGUEST, fDirty),
360 SSMFIELD_ENTRY( RECPATCHTOGUEST, fJumpTarget),
361 SSMFIELD_ENTRY( RECPATCHTOGUEST, u8DirtyOpcode),
362 SSMFIELD_ENTRY_PAD_HC_AUTO( 1, 5),
363 SSMFIELD_ENTRY_TERM()
364};
365
366
367#ifdef VBOX_STRICT
368/**
369 * Callback function for RTAvlPVDoWithAll
370 *
371 * Counts the number of patches in the tree
372 *
373 * @returns VBox status code.
374 * @param pNode Current node
375 * @param pcPatches Pointer to patch counter (uint32_t)
376 */
377static DECLCALLBACK(int) patmCountLeafPV(PAVLPVNODECORE pNode, void *pcPatches)
378{
379 *(uint32_t *)pcPatches = *(uint32_t *)pcPatches + 1;
380 return VINF_SUCCESS;
381}
382
383/**
384 * Callback function for RTAvlU32DoWithAll
385 *
386 * Counts the number of patches in the tree
387 *
388 * @returns VBox status code.
389 * @param pNode Current node
390 * @param pcPatches Pointer to patch counter (uint32_t)
391 */
392static DECLCALLBACK(int) patmCountLeaf(PAVLU32NODECORE pNode, void *pcPatches)
393{
394 *(uint32_t *)pcPatches = *(uint32_t *)pcPatches + 1;
395 return VINF_SUCCESS;
396}
397#endif /* VBOX_STRICT */
398
399/**
400 * Callback function for RTAvloU32DoWithAll
401 *
402 * Counts the number of patches in the tree
403 *
404 * @returns VBox status code.
405 * @param pNode Current node
406 * @param pcPatches Pointer to patch counter
407 */
408static DECLCALLBACK(int) patmCountPatch(PAVLOU32NODECORE pNode, void *pcPatches)
409{
410 *(uint32_t *)pcPatches = *(uint32_t *)pcPatches + 1;
411 return VINF_SUCCESS;
412}
413
414/**
415 * Callback function for RTAvlU32DoWithAll
416 *
417 * Saves all patch to guest lookup records.
418 *
419 * @returns VBox status code.
420 * @param pNode Current node
421 * @param pVM1 VM Handle
422 */
423static DECLCALLBACK(int) patmSaveP2GLookupRecords(PAVLU32NODECORE pNode, void *pVM1)
424{
425 PVM pVM = (PVM)pVM1;
426 PSSMHANDLE pSSM = pVM->patm.s.savedstate.pSSM;
427 PRECPATCHTOGUEST pPatchToGuestRec = (PRECPATCHTOGUEST)pNode;
428
429 /* Save the lookup record. */
430 int rc = SSMR3PutMem(pSSM, pPatchToGuestRec, sizeof(RECPATCHTOGUEST));
431 AssertRCReturn(rc, rc);
432
433 return VINF_SUCCESS;
434}
435
436/**
437 * Callback function for RTAvlPVDoWithAll
438 *
439 * Saves all patch to guest lookup records.
440 *
441 * @returns VBox status code.
442 * @param pNode Current node
443 * @param pVM1 VM Handle
444 */
445static DECLCALLBACK(int) patmSaveFixupRecords(PAVLPVNODECORE pNode, void *pVM1)
446{
447 PVM pVM = (PVM)pVM1;
448 PSSMHANDLE pSSM = pVM->patm.s.savedstate.pSSM;
449 RELOCREC rec = *(PRELOCREC)pNode;
450 RTRCPTR *pFixup = (RTRCPTR *)rec.pRelocPos;
451
452 Assert(rec.pRelocPos);
453 /* Convert pointer to an offset into patch memory. */
454 PATM_SUBTRACT_PTR(rec.pRelocPos, pVM->patm.s.pPatchMemHC);
455
456 if (rec.uType == FIXUP_ABSOLUTE)
457 {
458 /* Core.Key abused to store the fixup type. */
459 if (*pFixup == pVM->pVMRC + RT_OFFSETOF(VM, aCpus[0].fLocalForcedActions))
460 rec.Core.Key = (AVLPVKEY)PATM_FIXUP_CPU_FF_ACTION;
461 else
462 if (*pFixup == CPUMR3GetGuestCpuIdDefRCPtr(pVM))
463 rec.Core.Key = (AVLPVKEY)PATM_FIXUP_CPUID_DEFAULT;
464 else
465 if (*pFixup == CPUMR3GetGuestCpuIdStdRCPtr(pVM))
466 rec.Core.Key = (AVLPVKEY)PATM_FIXUP_CPUID_STANDARD;
467 else
468 if (*pFixup == CPUMR3GetGuestCpuIdExtRCPtr(pVM))
469 rec.Core.Key = (AVLPVKEY)PATM_FIXUP_CPUID_EXTENDED;
470 else
471 if (*pFixup == CPUMR3GetGuestCpuIdCentaurRCPtr(pVM))
472 rec.Core.Key = (AVLPVKEY)PATM_FIXUP_CPUID_CENTAUR;
473 }
474
475 /* Save the lookup record. */
476 int rc = SSMR3PutMem(pSSM, &rec, sizeof(rec));
477 AssertRCReturn(rc, rc);
478
479 return VINF_SUCCESS;
480}
481
482/**
483 * Converts a saved state patch record to the memory record.
484 *
485 * @returns nothing.
486 * @param pPatch The memory record.
487 * @param pPatchSSM The SSM version of the patch record.
488 */
489static void patmR3PatchConvertSSM2Mem(PPATMPATCHREC pPatch, PPATMPATCHRECSSM pPatchSSM)
490{
491 /*
492 * Only restore the patch part of the tree record; not the internal data (except the key of course)
493 */
494 pPatch->Core.Key = pPatchSSM->Core.Key;
495 pPatch->CoreOffset.Key = pPatchSSM->CoreOffset.Key;
496 pPatch->patch.uState = pPatchSSM->patch.uState;
497 pPatch->patch.uOldState = pPatchSSM->patch.uOldState;
498 pPatch->patch.uOpMode = pPatchSSM->patch.uOpMode;
499 pPatch->patch.pPrivInstrGC = pPatchSSM->patch.pPrivInstrGC;
500 pPatch->patch.unusedHC = pPatchSSM->patch.unusedHC;
501 memcpy(&pPatch->patch.aPrivInstr[0], &pPatchSSM->patch.aPrivInstr[0], MAX_INSTR_SIZE);
502 pPatch->patch.cbPrivInstr = pPatchSSM->patch.cbPrivInstr;
503 pPatch->patch.opcode = pPatchSSM->patch.opcode;
504 pPatch->patch.cbPatchJump = pPatchSSM->patch.cbPatchJump;
505 pPatch->patch.pPatchJumpDestGC = pPatchSSM->patch.pPatchJumpDestGC;
506 pPatch->patch.pPatchBlockOffset = pPatchSSM->patch.pPatchBlockOffset;
507 pPatch->patch.cbPatchBlockSize = pPatchSSM->patch.cbPatchBlockSize;
508 pPatch->patch.uCurPatchOffset = pPatchSSM->patch.uCurPatchOffset;
509 pPatch->patch.flags = pPatchSSM->patch.flags;
510 pPatch->patch.pInstrGCLowest = pPatchSSM->patch.pInstrGCLowest;
511 pPatch->patch.pInstrGCHighest = pPatchSSM->patch.pInstrGCHighest;
512 pPatch->patch.FixupTree = pPatchSSM->patch.FixupTree;
513 pPatch->patch.nrFixups = pPatchSSM->patch.nrFixups;
514 pPatch->patch.nrJumpRecs = pPatchSSM->patch.nrJumpRecs;
515 pPatch->patch.JumpTree = pPatchSSM->patch.JumpTree;
516 pPatch->patch.Patch2GuestAddrTree = pPatchSSM->patch.Patch2GuestAddrTree;
517 pPatch->patch.Guest2PatchAddrTree = pPatchSSM->patch.Guest2PatchAddrTree;
518 pPatch->patch.nrPatch2GuestRecs = pPatchSSM->patch.nrPatch2GuestRecs;
519 pPatch->patch.unused = pPatchSSM->patch.unused;
520 pPatch->patch.pTempInfo = pPatchSSM->patch.pTempInfo;
521 pPatch->patch.cCodeWrites = pPatchSSM->patch.cCodeWrites;
522 pPatch->patch.cTraps = pPatchSSM->patch.cTraps;
523 pPatch->patch.cInvalidWrites = pPatchSSM->patch.cInvalidWrites;
524 pPatch->patch.uPatchIdx = pPatchSSM->patch.uPatchIdx;
525 pPatch->patch.bDirtyOpcode = pPatchSSM->patch.bDirtyOpcode;
526 pPatch->patch.pTrampolinePatchesHead = NULL;
527}
528
529/**
530 * Converts a memory patch record to the saved state version.
531 *
532 * @returns nothing.
533 * @param pPatchSSM The saved state record.
534 * @param pPatch The memory version to save.
535 */
536static void patmR3PatchConvertMem2SSM(PPATMPATCHRECSSM pPatchSSM, PPATMPATCHREC pPatch)
537{
538 pPatchSSM->Core = pPatch->Core;
539 pPatchSSM->CoreOffset = pPatch->CoreOffset;
540 pPatchSSM->patch.uState = pPatch->patch.uState;
541 pPatchSSM->patch.uOldState = pPatch->patch.uOldState;
542 pPatchSSM->patch.uOpMode = pPatch->patch.uOpMode;
543 pPatchSSM->patch.pPrivInstrGC = pPatch->patch.pPrivInstrGC;
544 pPatchSSM->patch.unusedHC = pPatch->patch.unusedHC;
545 memcpy(&pPatchSSM->patch.aPrivInstr[0], &pPatch->patch.aPrivInstr[0], MAX_INSTR_SIZE);
546 pPatchSSM->patch.cbPrivInstr = pPatch->patch.cbPrivInstr;
547 pPatchSSM->patch.opcode = pPatch->patch.opcode;
548 pPatchSSM->patch.cbPatchJump = pPatch->patch.cbPatchJump;
549 pPatchSSM->patch.pPatchJumpDestGC = pPatch->patch.pPatchJumpDestGC;
550 pPatchSSM->patch.pPatchBlockOffset = pPatch->patch.pPatchBlockOffset;
551 pPatchSSM->patch.cbPatchBlockSize = pPatch->patch.cbPatchBlockSize;
552 pPatchSSM->patch.uCurPatchOffset = pPatch->patch.uCurPatchOffset;
553 pPatchSSM->patch.flags = pPatch->patch.flags;
554 pPatchSSM->patch.pInstrGCLowest = pPatch->patch.pInstrGCLowest;
555 pPatchSSM->patch.pInstrGCHighest = pPatch->patch.pInstrGCHighest;
556 pPatchSSM->patch.FixupTree = pPatch->patch.FixupTree;
557 pPatchSSM->patch.nrFixups = pPatch->patch.nrFixups;
558 pPatchSSM->patch.nrJumpRecs = pPatch->patch.nrJumpRecs;
559 pPatchSSM->patch.JumpTree = pPatch->patch.JumpTree;
560 pPatchSSM->patch.Patch2GuestAddrTree = pPatch->patch.Patch2GuestAddrTree;
561 pPatchSSM->patch.Guest2PatchAddrTree = pPatch->patch.Guest2PatchAddrTree;
562 pPatchSSM->patch.nrPatch2GuestRecs = pPatch->patch.nrPatch2GuestRecs;
563 pPatchSSM->patch.unused = pPatch->patch.unused;
564 pPatchSSM->patch.pTempInfo = pPatch->patch.pTempInfo;
565 pPatchSSM->patch.cCodeWrites = pPatch->patch.cCodeWrites;
566 pPatchSSM->patch.cTraps = pPatch->patch.cTraps;
567 pPatchSSM->patch.cInvalidWrites = pPatch->patch.cInvalidWrites;
568 pPatchSSM->patch.uPatchIdx = pPatch->patch.uPatchIdx;
569 pPatchSSM->patch.bDirtyOpcode = pPatch->patch.bDirtyOpcode;
570}
571
572/**
573 * Callback function for RTAvloU32DoWithAll
574 *
575 * Saves the state of the patch that's being enumerated
576 *
577 * @returns VBox status code.
578 * @param pNode Current node
579 * @param pVM1 VM Handle
580 */
581static DECLCALLBACK(int) patmSavePatchState(PAVLOU32NODECORE pNode, void *pVM1)
582{
583 PVM pVM = (PVM)pVM1;
584 PPATMPATCHREC pPatch = (PPATMPATCHREC)pNode;
585 PATMPATCHRECSSM patch;
586 PSSMHANDLE pSSM = pVM->patm.s.savedstate.pSSM;
587 int rc;
588
589 Assert(!(pPatch->patch.flags & PATMFL_GLOBAL_FUNCTIONS));
590
591 patmR3PatchConvertMem2SSM(&patch, pPatch);
592
593 /*
594 * Reset HC pointers that need to be recalculated when loading the state
595 */
596 AssertMsg(patch.patch.uState == PATCH_REFUSED || (patch.patch.pPatchBlockOffset || (patch.patch.flags & (PATMFL_SYSENTER_XP|PATMFL_INT3_REPLACEMENT))),
597 ("State = %x pPatchBlockHC=%08x flags=%x\n", patch.patch.uState, PATCHCODE_PTR_HC(&patch.patch), patch.patch.flags));
598 Assert(pPatch->patch.JumpTree == 0);
599 Assert(!pPatch->patch.pTempInfo || pPatch->patch.pTempInfo->DisasmJumpTree == 0);
600 Assert(!pPatch->patch.pTempInfo || pPatch->patch.pTempInfo->IllegalInstrTree == 0);
601
602 /* Save the patch record itself */
603 rc = SSMR3PutMem(pSSM, &patch, sizeof(patch));
604 AssertRCReturn(rc, rc);
605
606 /*
607 * Reset HC pointers in fixup records and save them.
608 */
609#ifdef VBOX_STRICT
610 uint32_t nrFixupRecs = 0;
611 RTAvlPVDoWithAll(&pPatch->patch.FixupTree, true, patmCountLeafPV, &nrFixupRecs);
612 AssertMsg(nrFixupRecs == pPatch->patch.nrFixups, ("Fixup inconsistency! counted %d vs %d\n", nrFixupRecs, pPatch->patch.nrFixups));
613#endif
614 RTAvlPVDoWithAll(&pPatch->patch.FixupTree, true, patmSaveFixupRecords, pVM);
615
616#ifdef VBOX_STRICT
617 uint32_t nrLookupRecords = 0;
618 RTAvlU32DoWithAll(&pPatch->patch.Patch2GuestAddrTree, true, patmCountLeaf, &nrLookupRecords);
619 Assert(nrLookupRecords == pPatch->patch.nrPatch2GuestRecs);
620#endif
621
622 RTAvlU32DoWithAll(&pPatch->patch.Patch2GuestAddrTree, true, patmSaveP2GLookupRecords, pVM);
623 return VINF_SUCCESS;
624}
625
626/**
627 * Execute state save operation.
628 *
629 * @returns VBox status code.
630 * @param pVM VM Handle.
631 * @param pSSM SSM operation handle.
632 */
633DECLCALLBACK(int) patmR3Save(PVM pVM, PSSMHANDLE pSSM)
634{
635 PATM patmInfo = pVM->patm.s;
636 int rc;
637
638 pVM->patm.s.savedstate.pSSM = pSSM;
639
640 /*
641 * Reset HC pointers that need to be recalculated when loading the state
642 */
643 patmInfo.pPatchMemHC = NULL;
644 patmInfo.pGCStateHC = 0;
645 patmInfo.pvFaultMonitor = 0;
646
647 Assert(patmInfo.ulCallDepth == 0);
648
649 /*
650 * Count the number of patches in the tree (feeling lazy)
651 */
652 patmInfo.savedstate.cPatches = 0;
653 RTAvloU32DoWithAll(&pVM->patm.s.PatchLookupTreeHC->PatchTree, true, patmCountPatch, &patmInfo.savedstate.cPatches);
654
655 /*
656 * Save PATM structure
657 */
658 rc = SSMR3PutMem(pSSM, &patmInfo, sizeof(patmInfo));
659 AssertRCReturn(rc, rc);
660
661 /*
662 * Save patch memory contents
663 */
664 rc = SSMR3PutMem(pSSM, pVM->patm.s.pPatchMemHC, pVM->patm.s.cbPatchMem);
665 AssertRCReturn(rc, rc);
666
667 /*
668 * Save GC state memory
669 */
670 rc = SSMR3PutMem(pSSM, pVM->patm.s.pGCStateHC, sizeof(PATMGCSTATE));
671 AssertRCReturn(rc, rc);
672
673 /*
674 * Save PATM stack page
675 */
676 rc = SSMR3PutMem(pSSM, pVM->patm.s.pGCStackHC, PATM_STACK_TOTAL_SIZE);
677 AssertRCReturn(rc, rc);
678
679 /*
680 * Save all patches
681 */
682 rc = RTAvloU32DoWithAll(&pVM->patm.s.PatchLookupTreeHC->PatchTree, true, patmSavePatchState, pVM);
683 AssertRCReturn(rc, rc);
684
685 /** @note patch statistics are not saved. */
686
687 return VINF_SUCCESS;
688}
689
690/**
691 * Execute state load operation.
692 *
693 * @returns VBox status code.
694 * @param pVM VM Handle.
695 * @param pSSM SSM operation handle.
696 * @param uVersion Data layout version.
697 * @param uPass The data pass.
698 */
699DECLCALLBACK(int) patmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass)
700{
701 PATM patmInfo;
702 int rc;
703
704 if ( uVersion != PATM_SSM_VERSION
705 && uVersion != PATM_SSM_VERSION_FIXUP_HACK
706 && uVersion != PATM_SSM_VERSION_VER16
707 )
708 {
709 AssertMsgFailed(("patmR3Load: Invalid version uVersion=%d!\n", uVersion));
710 return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
711 }
712 Assert(uPass == SSM_PASS_FINAL); NOREF(uPass);
713
714 pVM->patm.s.savedstate.pSSM = pSSM;
715
716 /*
717 * Restore PATM structure
718 */
719 RT_ZERO(patmInfo);
720 rc = SSMR3GetStructEx(pSSM, &patmInfo, sizeof(patmInfo), SSMSTRUCT_FLAGS_MEM_BAND_AID, &g_aPatmFields[0], NULL);
721 AssertRCReturn(rc, rc);
722
723 /* Relative calls are made to the helper functions. Therefor their relative location must not change! */
724 /* Note: we reuse the saved global helpers and assume they are identical, which is kind of dangerous. */
725 if ( (pVM->patm.s.pfnHelperCallGC - pVM->patm.s.pPatchMemGC) != (patmInfo.pfnHelperCallGC - patmInfo.pPatchMemGC)
726 || (pVM->patm.s.pfnHelperRetGC - pVM->patm.s.pPatchMemGC) != (patmInfo.pfnHelperRetGC - patmInfo.pPatchMemGC)
727 || (pVM->patm.s.pfnHelperJumpGC - pVM->patm.s.pPatchMemGC) != (patmInfo.pfnHelperJumpGC - patmInfo.pPatchMemGC)
728 || (pVM->patm.s.pfnHelperIretGC - pVM->patm.s.pPatchMemGC) != (patmInfo.pfnHelperIretGC - patmInfo.pPatchMemGC))
729 {
730 AssertMsgFailed(("Helper function ptrs don't match!!!\n"));
731 return VERR_SSM_INVALID_STATE;
732 }
733
734 if (pVM->patm.s.cbPatchMem != patmInfo.cbPatchMem)
735 {
736 AssertMsgFailed(("Patch memory ptrs and/or sizes don't match!!!\n"));
737 return VERR_SSM_INVALID_STATE;
738 }
739 pVM->patm.s.offPatchMem = patmInfo.offPatchMem;
740 pVM->patm.s.deltaReloc = patmInfo.deltaReloc;
741 pVM->patm.s.uCurrentPatchIdx = patmInfo.uCurrentPatchIdx;
742 pVM->patm.s.fOutOfMemory = patmInfo.fOutOfMemory;
743
744 /* Lowest and highest patched instruction */
745 pVM->patm.s.pPatchedInstrGCLowest = patmInfo.pPatchedInstrGCLowest;
746 pVM->patm.s.pPatchedInstrGCHighest = patmInfo.pPatchedInstrGCHighest;
747
748 /* Sysenter handlers */
749 pVM->patm.s.pfnSysEnterGC = patmInfo.pfnSysEnterGC;
750 pVM->patm.s.pfnSysEnterPatchGC = patmInfo.pfnSysEnterPatchGC;
751 pVM->patm.s.uSysEnterPatchIdx = patmInfo.uSysEnterPatchIdx;
752
753 Assert(patmInfo.ulCallDepth == 0 && pVM->patm.s.ulCallDepth == 0);
754
755 Log(("pPatchMemGC %RRv vs old %RRv\n", pVM->patm.s.pPatchMemGC, patmInfo.pPatchMemGC));
756 Log(("pGCStateGC %RRv vs old %RRv\n", pVM->patm.s.pGCStateGC, patmInfo.pGCStateGC));
757 Log(("pGCStackGC %RRv vs old %RRv\n", pVM->patm.s.pGCStackGC, patmInfo.pGCStackGC));
758 Log(("pCPUMCtxGC %RRv vs old %RRv\n", pVM->patm.s.pCPUMCtxGC, patmInfo.pCPUMCtxGC));
759
760
761 /** @note patch statistics are not restored. */
762
763 /*
764 * Restore patch memory contents
765 */
766 Log(("Restore patch memory: new %RRv old %RRv\n", pVM->patm.s.pPatchMemGC, patmInfo.pPatchMemGC));
767 rc = SSMR3GetMem(pSSM, pVM->patm.s.pPatchMemHC, pVM->patm.s.cbPatchMem);
768 AssertRCReturn(rc, rc);
769
770 /*
771 * Restore GC state memory
772 */
773 RT_BZERO(pVM->patm.s.pGCStateHC, sizeof(PATMGCSTATE));
774 rc = SSMR3GetStructEx(pSSM, pVM->patm.s.pGCStateHC, sizeof(PATMGCSTATE), SSMSTRUCT_FLAGS_MEM_BAND_AID, &g_aPatmGCStateFields[0], NULL);
775 AssertRCReturn(rc, rc);
776
777 /*
778 * Restore PATM stack page
779 */
780 rc = SSMR3GetMem(pSSM, pVM->patm.s.pGCStackHC, PATM_STACK_TOTAL_SIZE);
781 AssertRCReturn(rc, rc);
782
783 /*
784 * Load all patches
785 */
786 for (unsigned i = 0; i < patmInfo.savedstate.cPatches; i++)
787 {
788 PATMPATCHRECSSM patch;
789 PATMPATCHREC *pPatchRec;
790
791 RT_ZERO(patch);
792 rc = SSMR3GetStructEx(pSSM, &patch, sizeof(patch), SSMSTRUCT_FLAGS_MEM_BAND_AID, &g_aPatmPatchRecFields[0], NULL);
793 AssertRCReturn(rc, rc);
794
795 Assert(!(patch.patch.flags & PATMFL_GLOBAL_FUNCTIONS));
796
797 rc = MMHyperAlloc(pVM, sizeof(PATMPATCHREC), 0, MM_TAG_PATM_PATCH, (void **)&pPatchRec);
798 if (RT_FAILURE(rc))
799 {
800 AssertMsgFailed(("Out of memory!!!!\n"));
801 return VERR_NO_MEMORY;
802 }
803
804 /* Convert SSM version to memory. */
805 patmR3PatchConvertSSM2Mem(pPatchRec, &patch);
806
807 Log(("Restoring patch %RRv -> %RRv\n", pPatchRec->patch.pPrivInstrGC, patmInfo.pPatchMemGC + pPatchRec->patch.pPatchBlockOffset));
808 bool ret = RTAvloU32Insert(&pVM->patm.s.PatchLookupTreeHC->PatchTree, &pPatchRec->Core);
809 Assert(ret);
810 if (pPatchRec->patch.uState != PATCH_REFUSED)
811 {
812 if (pPatchRec->patch.pPatchBlockOffset)
813 {
814 /* We actually generated code for this patch. */
815 ret = RTAvloU32Insert(&pVM->patm.s.PatchLookupTreeHC->PatchTreeByPatchAddr, &pPatchRec->CoreOffset);
816 AssertMsg(ret, ("Inserting patch %RRv offset %08RX32 failed!!\n", pPatchRec->patch.pPrivInstrGC, pPatchRec->CoreOffset.Key));
817 }
818 }
819 /* Set to zero as we don't need it anymore. */
820 pPatchRec->patch.pTempInfo = 0;
821
822 PATMP2GLOOKUPREC cacheRec;
823 RT_ZERO(cacheRec);
824 cacheRec.pPatch = &pPatchRec->patch;
825
826 uint8_t *pPrivInstrHC = PATMGCVirtToHCVirt(pVM, &cacheRec, pPatchRec->patch.pPrivInstrGC);
827 /* Can fail due to page or page table not present. */
828
829 /*
830 * Restore fixup records and correct HC pointers in fixup records
831 */
832 pPatchRec->patch.FixupTree = 0;
833 pPatchRec->patch.nrFixups = 0; /* increased by patmPatchAddReloc32 */
834 for (unsigned j = 0; j < patch.patch.nrFixups; j++)
835 {
836 RELOCREC rec;
837 int32_t offset;
838 RTRCPTR *pFixup;
839
840 RT_ZERO(rec);
841 rc = SSMR3GetStructEx(pSSM, &rec, sizeof(rec), SSMSTRUCT_FLAGS_MEM_BAND_AID, &g_aPatmRelocRec[0], NULL);
842 AssertRCReturn(rc, rc);
843
844 if (pPrivInstrHC)
845 {
846 /* rec.pRelocPos now contains the relative position inside the hypervisor area. */
847 offset = (int32_t)(intptr_t)rec.pRelocPos;
848 /* Convert to HC pointer again. */
849 PATM_ADD_PTR(rec.pRelocPos, pVM->patm.s.pPatchMemHC);
850 pFixup = (RTRCPTR *)rec.pRelocPos;
851
852 if (pPatchRec->patch.uState != PATCH_REFUSED)
853 {
854 if ( rec.uType == FIXUP_REL_JMPTOPATCH
855 && (pPatchRec->patch.flags & PATMFL_PATCHED_GUEST_CODE))
856 {
857 Assert(pPatchRec->patch.cbPatchJump == SIZEOF_NEARJUMP32 || pPatchRec->patch.cbPatchJump == SIZEOF_NEAR_COND_JUMP32);
858 unsigned offset2 = (pPatchRec->patch.cbPatchJump == SIZEOF_NEARJUMP32) ? 1 : 2;
859
860 rec.pRelocPos = pPrivInstrHC + offset2;
861 pFixup = (RTRCPTR *)rec.pRelocPos;
862 }
863
864 patmCorrectFixup(pVM, uVersion, patmInfo, &pPatchRec->patch, &rec, offset, pFixup);
865 }
866
867 rc = patmPatchAddReloc32(pVM, &pPatchRec->patch, rec.pRelocPos, rec.uType, rec.pSource, rec.pDest);
868 AssertRCReturn(rc, rc);
869 }
870 }
871 /* Release previous lock if any. */
872 if (cacheRec.Lock.pvMap)
873 PGMPhysReleasePageMappingLock(pVM, &cacheRec.Lock);
874
875 /* And all patch to guest lookup records */
876 Assert(pPatchRec->patch.nrPatch2GuestRecs || pPatchRec->patch.uState == PATCH_REFUSED || (pPatchRec->patch.flags & (PATMFL_SYSENTER_XP | PATMFL_IDTHANDLER | PATMFL_TRAPHANDLER | PATMFL_INT3_REPLACEMENT)));
877
878 pPatchRec->patch.Patch2GuestAddrTree = 0;
879 pPatchRec->patch.Guest2PatchAddrTree = 0;
880 if (pPatchRec->patch.nrPatch2GuestRecs)
881 {
882 RECPATCHTOGUEST rec;
883 uint32_t nrPatch2GuestRecs = pPatchRec->patch.nrPatch2GuestRecs;
884
885 pPatchRec->patch.nrPatch2GuestRecs = 0; /* incremented by patmr3AddP2GLookupRecord */
886 for (uint32_t j=0;j<nrPatch2GuestRecs;j++)
887 {
888 RT_ZERO(rec);
889 rc = SSMR3GetStructEx(pSSM, &rec, sizeof(rec), SSMSTRUCT_FLAGS_MEM_BAND_AID, &g_aPatmRecPatchToGuest[0], NULL);
890 AssertRCReturn(rc, rc);
891
892 patmr3AddP2GLookupRecord(pVM, &pPatchRec->patch, (uintptr_t)rec.Core.Key + pVM->patm.s.pPatchMemHC, rec.pOrgInstrGC, rec.enmType, rec.fDirty);
893 }
894 Assert(pPatchRec->patch.Patch2GuestAddrTree);
895 }
896
897 if (pPatchRec->patch.flags & PATMFL_CODE_MONITORED)
898 {
899 /* Insert the guest page lookup records (for detection self-modifying code) */
900 rc = patmInsertPatchPages(pVM, &pPatchRec->patch);
901 AssertRCReturn(rc, rc);
902 }
903
904#if 0 /* can fail def LOG_ENABLED */
905 if ( pPatchRec->patch.uState != PATCH_REFUSED
906 && !(pPatchRec->patch.flags & PATMFL_INT3_REPLACEMENT))
907 {
908 pPatchRec->patch.pTempInfo = (PPATCHINFOTEMP)MMR3HeapAllocZ(pVM, MM_TAG_PATM_PATCH, sizeof(PATCHINFOTEMP));
909 Log(("Patch code ----------------------------------------------------------\n"));
910 patmr3DisasmCodeStream(pVM, PATCHCODE_PTR_GC(&pPatchRec->patch), PATCHCODE_PTR_GC(&pPatchRec->patch), patmr3DisasmCallback, &pPatchRec->patch);
911 Log(("Patch code ends -----------------------------------------------------\n"));
912 MMR3HeapFree(pPatchRec->patch.pTempInfo);
913 pPatchRec->patch.pTempInfo = NULL;
914 }
915#endif
916 /* Remove the patch in case the gc mapping is not present. */
917 if ( !pPrivInstrHC
918 && pPatchRec->patch.uState == PATCH_ENABLED)
919 {
920 Log(("Remove patch %RGv due to failed HC address translation\n", pPatchRec->patch.pPrivInstrGC));
921 PATMR3RemovePatch(pVM, pPatchRec->patch.pPrivInstrGC);
922 }
923 }
924
925 /*
926 * Correct absolute fixups in the global patch. (helper functions)
927 * Bit of a mess. Uses the new patch record, but restored patch functions.
928 */
929 PRELOCREC pRec = 0;
930 AVLPVKEY key = 0;
931
932 Log(("Correct fixups in global helper functions\n"));
933 while (true)
934 {
935 int32_t offset;
936 RTRCPTR *pFixup;
937
938 /* Get the record that's closest from above */
939 pRec = (PRELOCREC)RTAvlPVGetBestFit(&pVM->patm.s.pGlobalPatchRec->patch.FixupTree, key, true);
940 if (pRec == 0)
941 break;
942
943 key = (AVLPVKEY)(pRec->pRelocPos + 1); /* search for the next record during the next round. */
944
945 /* rec.pRelocPos now contains the relative position inside the hypervisor area. */
946 offset = (int32_t)(pRec->pRelocPos - pVM->patm.s.pPatchMemHC);
947 pFixup = (RTRCPTR *)pRec->pRelocPos;
948
949 /* Correct fixups that refer to PATM structures in the hypervisor region (their addresses might have changed). */
950 patmCorrectFixup(pVM, uVersion, patmInfo, &pVM->patm.s.pGlobalPatchRec->patch, pRec, offset, pFixup);
951 }
952
953#ifdef VBOX_WITH_STATISTICS
954 /*
955 * Restore relevant old statistics
956 */
957 pVM->patm.s.StatDisabled = patmInfo.StatDisabled;
958 pVM->patm.s.StatUnusable = patmInfo.StatUnusable;
959 pVM->patm.s.StatEnabled = patmInfo.StatEnabled;
960 pVM->patm.s.StatInstalled = patmInfo.StatInstalled;
961#endif
962
963 return VINF_SUCCESS;
964}
965
966/**
967 * Correct fixups to predefined hypervisor PATM regions. (their addresses might have changed)
968 *
969 * @returns VBox status code.
970 * @param pVM VM Handle.
971 * @param ulSSMVersion SSM version
972 * @param patmInfo Saved PATM structure
973 * @param pPatch Patch record
974 * @param pRec Relocation record
975 * @param offset Offset of referenced data/code
976 * @param pFixup Fixup address
977 */
978static void patmCorrectFixup(PVM pVM, unsigned ulSSMVersion, PATM &patmInfo, PPATCHINFO pPatch, PRELOCREC pRec, int32_t offset, RTRCPTR *pFixup)
979{
980 int32_t delta = pVM->patm.s.pPatchMemGC - patmInfo.pPatchMemGC;
981
982 switch (pRec->uType)
983 {
984 case FIXUP_ABSOLUTE:
985 {
986 if (pRec->pSource && !PATMIsPatchGCAddr(pVM, (RTRCUINTPTR)pRec->pSource))
987 break;
988
989 if ( *pFixup >= patmInfo.pGCStateGC
990 && *pFixup < patmInfo.pGCStateGC + sizeof(PATMGCSTATE))
991 {
992 LogFlow(("Changing absolute GCState at %RRv from %RRv to %RRv\n", patmInfo.pPatchMemGC + offset, *pFixup, (*pFixup - patmInfo.pGCStateGC) + pVM->patm.s.pGCStateGC));
993 *pFixup = (*pFixup - patmInfo.pGCStateGC) + pVM->patm.s.pGCStateGC;
994 }
995 else
996 if ( *pFixup >= patmInfo.pCPUMCtxGC
997 && *pFixup < patmInfo.pCPUMCtxGC + sizeof(CPUMCTX))
998 {
999 LogFlow(("Changing absolute CPUMCTX at %RRv from %RRv to %RRv\n", patmInfo.pPatchMemGC + offset, *pFixup, (*pFixup - patmInfo.pCPUMCtxGC) + pVM->patm.s.pCPUMCtxGC));
1000
1001 /* The CPUMCTX structure has completely changed, so correct the offsets too. */
1002 if (ulSSMVersion == PATM_SSM_VERSION_VER16)
1003 {
1004 unsigned uCPUMOffset = *pFixup - patmInfo.pCPUMCtxGC;
1005
1006 /* ''case RT_OFFSETOF()'' does not work as gcc refuses to use & as a constant expression.
1007 * Defining RT_OFFSETOF as __builtin_offsetof for gcc would make this possible. But this
1008 * function is not available in older gcc versions, at least not in gcc-3.3 */
1009 if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, dr0))
1010 {
1011 LogFlow(("Changing dr[0] offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, dr[0])));
1012 *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr[0]);
1013 }
1014 else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, dr1))
1015 {
1016 LogFlow(("Changing dr[1] offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, dr[1])));
1017 *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr[1]);
1018 }
1019 else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, dr2))
1020 {
1021 LogFlow(("Changing dr[2] offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, dr[2])));
1022 *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr[2]);
1023 }
1024 else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, dr3))
1025 {
1026 LogFlow(("Changing dr[3] offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, dr[3])));
1027 *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr[3]);
1028 }
1029 else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, dr4))
1030 {
1031 LogFlow(("Changing dr[4] offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, dr[4])));
1032 *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr[4]);
1033 }
1034 else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, dr5))
1035 {
1036 LogFlow(("Changing dr[5] offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, dr[5])));
1037 *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr[5]);
1038 }
1039 else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, dr6))
1040 {
1041 LogFlow(("Changing dr[6] offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, dr[6])));
1042 *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr[6]);
1043 }
1044 else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, dr7))
1045 {
1046 LogFlow(("Changing dr[7] offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, dr[7])));
1047 *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr[7]);
1048 }
1049 else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, cr0))
1050 {
1051 LogFlow(("Changing cr0 offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, cr0)));
1052 *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, cr0);
1053 }
1054 else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, cr2))
1055 {
1056 LogFlow(("Changing cr2 offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, cr2)));
1057 *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, cr2);
1058 }
1059 else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, cr3))
1060 {
1061 LogFlow(("Changing cr3 offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, cr3)));
1062 *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, cr3);
1063 }
1064 else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, cr4))
1065 {
1066 LogFlow(("Changing cr4 offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, cr4)));
1067 *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, cr4);
1068 }
1069 else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, tr))
1070 {
1071 LogFlow(("Changing tr offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, tr)));
1072 *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, tr);
1073 }
1074 else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, ldtr))
1075 {
1076 LogFlow(("Changing ldtr offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, ldtr)));
1077 *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, ldtr);
1078 }
1079 else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, gdtr.pGdt))
1080 {
1081 LogFlow(("Changing pGdt offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, gdtr.pGdt)));
1082 *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, gdtr.pGdt);
1083 }
1084 else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, gdtr.cbGdt))
1085 {
1086 LogFlow(("Changing cbGdt offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, gdtr.cbGdt)));
1087 *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, gdtr.cbGdt);
1088 }
1089 else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, idtr.pIdt))
1090 {
1091 LogFlow(("Changing pIdt offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, idtr.pIdt)));
1092 *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, idtr.pIdt);
1093 }
1094 else if (uCPUMOffset == (unsigned)RT_OFFSETOF(CPUMCTX_VER1_6, idtr.cbIdt))
1095 {
1096 LogFlow(("Changing cbIdt offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, idtr.cbIdt)));
1097 *pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, idtr.cbIdt);
1098 }
1099 else
1100 AssertMsgFailed(("Unexpected CPUMCTX offset %x\n", uCPUMOffset));
1101 }
1102 else
1103 *pFixup = (*pFixup - patmInfo.pCPUMCtxGC) + pVM->patm.s.pCPUMCtxGC;
1104 }
1105 else
1106 if ( *pFixup >= patmInfo.pStatsGC
1107 && *pFixup < patmInfo.pStatsGC + PATM_STAT_MEMSIZE)
1108 {
1109 LogFlow(("Changing absolute Stats at %RRv from %RRv to %RRv\n", patmInfo.pPatchMemGC + offset, *pFixup, (*pFixup - patmInfo.pStatsGC) + pVM->patm.s.pStatsGC));
1110 *pFixup = (*pFixup - patmInfo.pStatsGC) + pVM->patm.s.pStatsGC;
1111 }
1112 else
1113 if ( *pFixup >= patmInfo.pGCStackGC
1114 && *pFixup < patmInfo.pGCStackGC + PATM_STACK_TOTAL_SIZE)
1115 {
1116 LogFlow(("Changing absolute Stack at %RRv from %RRv to %RRv\n", patmInfo.pPatchMemGC + offset, *pFixup, (*pFixup - patmInfo.pGCStackGC) + pVM->patm.s.pGCStackGC));
1117 *pFixup = (*pFixup - patmInfo.pGCStackGC) + pVM->patm.s.pGCStackGC;
1118 }
1119 else
1120 if ( *pFixup >= patmInfo.pPatchMemGC
1121 && *pFixup < patmInfo.pPatchMemGC + patmInfo.cbPatchMem)
1122 {
1123 LogFlow(("Changing absolute PatchMem at %RRv from %RRv to %RRv\n", patmInfo.pPatchMemGC + offset, *pFixup, (*pFixup - patmInfo.pPatchMemGC) + pVM->patm.s.pPatchMemGC));
1124 *pFixup = (*pFixup - patmInfo.pPatchMemGC) + pVM->patm.s.pPatchMemGC;
1125 }
1126 else
1127 /* Boldly ASSUMES:
1128 * 1. That pCPUMCtxGC is in the VM structure and that its location is
1129 * at the first page of the same 4 MB chunk.
1130 * 2. That the forced actions were in the first 32 bytes of the VM
1131 * structure.
1132 * 3. That the CPUM leafs are less than 8KB into the structure. */
1133 if ( ulSSMVersion <= PATM_SSM_VERSION_FIXUP_HACK
1134 && *pFixup - (patmInfo.pCPUMCtxGC & UINT32_C(0xffc00000)) < UINT32_C(32))
1135 {
1136 LogFlow(("Changing fLocalForcedActions fixup from %RRv to %RRv\n", *pFixup, pVM->pVMRC + RT_OFFSETOF(VM, aCpus[0].fLocalForcedActions)));
1137 *pFixup = pVM->pVMRC + RT_OFFSETOF(VM, aCpus[0].fLocalForcedActions);
1138 }
1139 else
1140 if ( ulSSMVersion <= PATM_SSM_VERSION_FIXUP_HACK
1141 && *pFixup - (patmInfo.pCPUMCtxGC & UINT32_C(0xffc00000)) < UINT32_C(8192))
1142 {
1143 static int cCpuidFixup = 0;
1144#ifdef LOG_ENABLED
1145 RTRCPTR oldFixup = *pFixup;
1146#endif
1147 /* very dirty assumptions about the cpuid patch and cpuid ordering. */
1148 switch(cCpuidFixup & 3)
1149 {
1150 case 0:
1151 *pFixup = CPUMR3GetGuestCpuIdDefRCPtr(pVM);
1152 break;
1153 case 1:
1154 *pFixup = CPUMR3GetGuestCpuIdStdRCPtr(pVM);
1155 break;
1156 case 2:
1157 *pFixup = CPUMR3GetGuestCpuIdExtRCPtr(pVM);
1158 break;
1159 case 3:
1160 *pFixup = CPUMR3GetGuestCpuIdCentaurRCPtr(pVM);
1161 break;
1162 }
1163 LogFlow(("Changing cpuid fixup %d from %RRv to %RRv\n", cCpuidFixup, oldFixup, *pFixup));
1164 cCpuidFixup++;
1165 }
1166 else
1167 if (ulSSMVersion >= PATM_SSM_VERSION)
1168 {
1169#ifdef LOG_ENABLED
1170 RTRCPTR oldFixup = *pFixup;
1171#endif
1172 /* Core.Key abused to store the type of fixup */
1173 switch ((uintptr_t)pRec->Core.Key)
1174 {
1175 case PATM_FIXUP_CPU_FF_ACTION:
1176 *pFixup = pVM->pVMRC + RT_OFFSETOF(VM, aCpus[0].fLocalForcedActions);
1177 LogFlow(("Changing cpu ff action fixup from %x to %x\n", oldFixup, *pFixup));
1178 break;
1179 case PATM_FIXUP_CPUID_DEFAULT:
1180 *pFixup = CPUMR3GetGuestCpuIdDefRCPtr(pVM);
1181 LogFlow(("Changing cpuid def fixup from %x to %x\n", oldFixup, *pFixup));
1182 break;
1183 case PATM_FIXUP_CPUID_STANDARD:
1184 *pFixup = CPUMR3GetGuestCpuIdStdRCPtr(pVM);
1185 LogFlow(("Changing cpuid std fixup from %x to %x\n", oldFixup, *pFixup));
1186 break;
1187 case PATM_FIXUP_CPUID_EXTENDED:
1188 *pFixup = CPUMR3GetGuestCpuIdExtRCPtr(pVM);
1189 LogFlow(("Changing cpuid ext fixup from %x to %x\n", oldFixup, *pFixup));
1190 break;
1191 case PATM_FIXUP_CPUID_CENTAUR:
1192 *pFixup = CPUMR3GetGuestCpuIdCentaurRCPtr(pVM);
1193 LogFlow(("Changing cpuid centaur fixup from %x to %x\n", oldFixup, *pFixup));
1194 break;
1195 default:
1196 AssertMsgFailed(("Unexpected fixup value %x\n", *pFixup));
1197 break;
1198 }
1199 }
1200
1201#ifdef RT_OS_WINDOWS
1202 AssertCompile(RT_OFFSETOF(VM, fGlobalForcedActions) < 32);
1203#endif
1204 break;
1205 }
1206
1207 case FIXUP_REL_JMPTOPATCH:
1208 {
1209 RTRCPTR pTarget = (RTRCPTR)((RTRCINTPTR)pRec->pDest + delta);
1210
1211 if ( pPatch->uState == PATCH_ENABLED
1212 && (pPatch->flags & PATMFL_PATCHED_GUEST_CODE))
1213 {
1214 uint8_t oldJump[SIZEOF_NEAR_COND_JUMP32];
1215 uint8_t temp[SIZEOF_NEAR_COND_JUMP32];
1216 RTRCPTR pJumpOffGC;
1217 RTRCINTPTR displ = (RTRCINTPTR)pTarget - (RTRCINTPTR)pRec->pSource;
1218 RTRCINTPTR displOld= (RTRCINTPTR)pRec->pDest - (RTRCINTPTR)pRec->pSource;
1219
1220 Log(("Relative fixup (g2p) %08X -> %08X at %08X (source=%08x, target=%08x)\n", *(int32_t*)pRec->pRelocPos, displ, pRec->pRelocPos, pRec->pSource, pRec->pDest));
1221
1222 Assert(pRec->pSource - pPatch->cbPatchJump == pPatch->pPrivInstrGC);
1223#ifdef PATM_RESOLVE_CONFLICTS_WITH_JUMP_PATCHES
1224 if (pPatch->cbPatchJump == SIZEOF_NEAR_COND_JUMP32)
1225 {
1226 Assert(pPatch->flags & PATMFL_JUMP_CONFLICT);
1227
1228 pJumpOffGC = pPatch->pPrivInstrGC + 2; //two byte opcode
1229 oldJump[0] = pPatch->aPrivInstr[0];
1230 oldJump[1] = pPatch->aPrivInstr[1];
1231 *(RTRCUINTPTR *)&oldJump[2] = displOld;
1232 }
1233 else
1234#endif
1235 if (pPatch->cbPatchJump == SIZEOF_NEARJUMP32)
1236 {
1237 pJumpOffGC = pPatch->pPrivInstrGC + 1; //one byte opcode
1238 oldJump[0] = 0xE9;
1239 *(RTRCUINTPTR *)&oldJump[1] = displOld;
1240 }
1241 else
1242 {
1243 AssertMsgFailed(("Invalid patch jump size %d\n", pPatch->cbPatchJump));
1244 break;
1245 }
1246 Assert(pPatch->cbPatchJump <= sizeof(temp));
1247
1248 /*
1249 * Read old patch jump and compare it to the one we previously installed
1250 */
1251 int rc = PGMPhysSimpleReadGCPtr(VMMGetCpu0(pVM), temp, pPatch->pPrivInstrGC, pPatch->cbPatchJump);
1252 Assert(RT_SUCCESS(rc) || rc == VERR_PAGE_NOT_PRESENT || rc == VERR_PAGE_TABLE_NOT_PRESENT);
1253
1254 if (rc == VERR_PAGE_NOT_PRESENT || rc == VERR_PAGE_TABLE_NOT_PRESENT)
1255 {
1256 RTRCPTR pPage = pPatch->pPrivInstrGC & PAGE_BASE_GC_MASK;
1257
1258 rc = PGMR3HandlerVirtualRegister(pVM, PGMVIRTHANDLERTYPE_ALL, pPage, pPage + (PAGE_SIZE - 1) /* inclusive! */, 0, patmVirtPageHandler, "PATMGCMonitorPage", 0, "PATMMonitorPatchJump");
1259 Assert(RT_SUCCESS(rc) || rc == VERR_PGM_HANDLER_VIRTUAL_CONFLICT);
1260 }
1261 else
1262 if (memcmp(temp, oldJump, pPatch->cbPatchJump))
1263 {
1264 Log(("PATM: Patch jump was overwritten -> disabling patch!!\n"));
1265 /*
1266 * Disable patch; this is not a good solution
1267 */
1268 /* @todo hopefully it was completely overwritten (if the read was successful)!!!! */
1269 pPatch->uState = PATCH_DISABLED;
1270 }
1271 else
1272 if (RT_SUCCESS(rc))
1273 {
1274 rc = PGMPhysSimpleDirtyWriteGCPtr(VMMGetCpu0(pVM), pJumpOffGC, &displ, sizeof(displ));
1275 AssertRC(rc);
1276 }
1277 else
1278 AssertMsgFailed(("Unexpected error %d from MMR3PhysReadGCVirt\n", rc));
1279 }
1280 else
1281 Log(("Skip the guest jump to patch code for this disabled patch %08X\n", pRec->pRelocPos));
1282
1283 pRec->pDest = pTarget;
1284 break;
1285 }
1286
1287 case FIXUP_REL_JMPTOGUEST:
1288 {
1289 RTRCPTR pSource = (RTRCPTR)((RTRCINTPTR)pRec->pSource + delta);
1290 RTRCINTPTR displ = (RTRCINTPTR)pRec->pDest - (RTRCINTPTR)pSource;
1291
1292 Assert(!(pPatch->flags & PATMFL_GLOBAL_FUNCTIONS));
1293 Log(("Relative fixup (p2g) %08X -> %08X at %08X (source=%08x, target=%08x)\n", *(int32_t*)pRec->pRelocPos, displ, pRec->pRelocPos, pRec->pSource, pRec->pDest));
1294 *(RTRCUINTPTR *)pRec->pRelocPos = displ;
1295 pRec->pSource = pSource;
1296 break;
1297
1298 }
1299}
1300}
1301
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