PATMSSM.cpp@ 11972

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1	/* $Id: PATMSSM.cpp 11972 2008-09-02 11:33:35Z 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 Sun Microsystems, Inc.
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	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
20	* Clara, CA 95054 USA or visit http://www.sun.com if you need
21	* additional information or have any questions.
22	*/
23
24	/*******************************************************************************
25	* Header Files *
26	*******************************************************************************/
27	#define LOG_GROUP LOG_GROUP_PATM
28	#include <VBox/patm.h>
29	#include <VBox/stam.h>
30	#include <VBox/pgm.h>
31	#include <VBox/cpum.h>
32	#include <VBox/iom.h>
33	#include <VBox/sup.h>
34	#include <VBox/mm.h>
35	#include <VBox/ssm.h>
36	#include <VBox/pdm.h>
37	#include <VBox/trpm.h>
38	#include <VBox/param.h>
39	#include <iprt/avl.h>
40	#include "PATMInternal.h"
41	#include "PATMPatch.h"
42	#include "PATMA.h"
43	#include <VBox/vm.h>
44	#include <VBox/csam.h>
45
46	#include <VBox/dbg.h>
47	#include <VBox/err.h>
48	#include <VBox/log.h>
49	#include <iprt/assert.h>
50	#include <iprt/asm.h>
51	#include <iprt/string.h>
52	#include <VBox/dis.h>
53	#include <VBox/disopcode.h>
54
55	#define PATM_SUBTRACT_PTR(a, b) (uintptr_t )&(a) = (uintptr_t)(a) - (uintptr_t)(b)
56	#define PATM_ADD_PTR(a, b) (uintptr_t )&(a) = (uintptr_t)(a) + (uintptr_t)(b)
57
58	static void patmCorrectFixup(PVM pVM, unsigned ulSSMVersion, PATM &patmInfo, PPATCHINFO pPatch, PRELOCREC pRec, int32_t offset, RTRCPTR *pFixup);
59
60	#ifdef VBOX_STRICT
61	/**
62	* Callback function for RTAvlPVDoWithAll
63	*
64	* Counts the number of patches in the tree
65	*
66	* @returns VBox status code.
67	* @param pNode Current node
68	* @param pcPatches Pointer to patch counter (uint32_t)
69	*/
70	static DECLCALLBACK(int) patmCountLeafPV(PAVLPVNODECORE pNode, void *pcPatches)
71	{
72	(uint32_t )pcPatches = (uint32_t )pcPatches + 1;
73	return VINF_SUCCESS;
74	}
75
76	/**
77	* Callback function for RTAvlU32DoWithAll
78	*
79	* Counts the number of patches in the tree
80	*
81	* @returns VBox status code.
82	* @param pNode Current node
83	* @param pcPatches Pointer to patch counter (uint32_t)
84	*/
85	static DECLCALLBACK(int) patmCountLeaf(PAVLU32NODECORE pNode, void *pcPatches)
86	{
87	(uint32_t )pcPatches = (uint32_t )pcPatches + 1;
88	return VINF_SUCCESS;
89	}
90	#endif /* VBOX_STRICT */
91
92	/**
93	* Callback function for RTAvloU32DoWithAll
94	*
95	* Counts the number of patches in the tree
96	*
97	* @returns VBox status code.
98	* @param pNode Current node
99	* @param pcPatches Pointer to patch counter
100	*/
101	static DECLCALLBACK(int) patmCountPatch(PAVLOU32NODECORE pNode, void *pcPatches)
102	{
103	(uint32_t )pcPatches = (uint32_t )pcPatches + 1;
104	return VINF_SUCCESS;
105	}
106
107	/**
108	* Callback function for RTAvlU32DoWithAll
109	*
110	* Saves all patch to guest lookup records.
111	*
112	* @returns VBox status code.
113	* @param pNode Current node
114	* @param pVM1 VM Handle
115	*/
116	static DECLCALLBACK(int) patmSaveP2GLookupRecords(PAVLU32NODECORE pNode, void *pVM1)
117	{
118	PVM pVM = (PVM)pVM1;
119	PSSMHANDLE pSSM = pVM->patm.s.savedstate.pSSM;
120	PRECPATCHTOGUEST pPatchToGuestRec = (PRECPATCHTOGUEST)pNode;
121
122	/* Save the lookup record. */
123	int rc = SSMR3PutMem(pSSM, pPatchToGuestRec, sizeof(RECPATCHTOGUEST));
124	AssertRCReturn(rc, rc);
125
126	return VINF_SUCCESS;
127	}
128
129	/**
130	* Callback function for RTAvlPVDoWithAll
131	*
132	* Saves all patch to guest lookup records.
133	*
134	* @returns VBox status code.
135	* @param pNode Current node
136	* @param pVM1 VM Handle
137	*/
138	static DECLCALLBACK(int) patmSaveFixupRecords(PAVLPVNODECORE pNode, void *pVM1)
139	{
140	PVM pVM = (PVM)pVM1;
141	PSSMHANDLE pSSM = pVM->patm.s.savedstate.pSSM;
142	RELOCREC rec = *(PRELOCREC)pNode;
143
144	Assert(rec.pRelocPos);
145	PATM_SUBTRACT_PTR(rec.pRelocPos, pVM->patm.s.pPatchMemHC);
146
147	/* Save the lookup record. */
148	int rc = SSMR3PutMem(pSSM, &rec, sizeof(rec));
149	AssertRCReturn(rc, rc);
150
151	return VINF_SUCCESS;
152	}
153
154
155	/**
156	* Callback function for RTAvloU32DoWithAll
157	*
158	* Saves the state of the patch that's being enumerated
159	*
160	* @returns VBox status code.
161	* @param pNode Current node
162	* @param pVM1 VM Handle
163	*/
164	static DECLCALLBACK(int) patmSavePatchState(PAVLOU32NODECORE pNode, void *pVM1)
165	{
166	PVM pVM = (PVM)pVM1;
167	PPATMPATCHREC pPatch = (PPATMPATCHREC)pNode;
168	PATMPATCHREC patch = *pPatch;
169	PSSMHANDLE pSSM = pVM->patm.s.savedstate.pSSM;
170	int rc;
171
172	Assert(!(pPatch->patch.flags & PATMFL_GLOBAL_FUNCTIONS));
173
174	/*
175	* Reset HC pointers that need to be recalculated when loading the state
176	*/
177	AssertMsg(patch.patch.uState == PATCH_REFUSED \|\| (patch.patch.pPatchBlockOffset \|\| (patch.patch.flags & (PATMFL_SYSENTER_XP\|PATMFL_INT3_REPLACEMENT))),
178	("State = %x pPrivInstrHC=%08x pPatchBlockHC=%08x flags=%x\n", patch.patch.uState, patch.patch.pPrivInstrHC, PATCHCODE_PTR_HC(&patch.patch), patch.patch.flags));
179	Assert(pPatch->patch.JumpTree == 0);
180	Assert(!pPatch->patch.pTempInfo \|\| pPatch->patch.pTempInfo->DisasmJumpTree == 0);
181	Assert(!pPatch->patch.pTempInfo \|\| pPatch->patch.pTempInfo->IllegalInstrTree == 0);
182
183	memset(&patch.patch.cacheRec, 0, sizeof(patch.patch.cacheRec));
184
185	/* Save the patch record itself */
186	rc = SSMR3PutMem(pSSM, &patch, sizeof(patch));
187	AssertRCReturn(rc, rc);
188
189	/*
190	* Reset HC pointers in fixup records and save them.
191	*/
192	#ifdef VBOX_STRICT
193	uint32_t nrFixupRecs = 0;
194	RTAvlPVDoWithAll(&pPatch->patch.FixupTree, true, patmCountLeafPV, &nrFixupRecs);
195	AssertMsg((int32_t)nrFixupRecs == pPatch->patch.nrFixups, ("Fixup inconsistency! counted %d vs %d\n", nrFixupRecs, pPatch->patch.nrFixups));
196	#endif
197	RTAvlPVDoWithAll(&pPatch->patch.FixupTree, true, patmSaveFixupRecords, pVM);
198
199	#ifdef VBOX_STRICT
200	uint32_t nrLookupRecords = 0;
201	RTAvlU32DoWithAll(&pPatch->patch.Patch2GuestAddrTree, true, patmCountLeaf, &nrLookupRecords);
202	Assert(nrLookupRecords == pPatch->patch.nrPatch2GuestRecs);
203	#endif
204
205	RTAvlU32DoWithAll(&pPatch->patch.Patch2GuestAddrTree, true, patmSaveP2GLookupRecords, pVM);
206	return VINF_SUCCESS;
207	}
208
209	/**
210	* Execute state save operation.
211	*
212	* @returns VBox status code.
213	* @param pVM VM Handle.
214	* @param pSSM SSM operation handle.
215	*/
216	DECLCALLBACK(int) patmr3Save(PVM pVM, PSSMHANDLE pSSM)
217	{
218	PATM patmInfo = pVM->patm.s;
219	int rc;
220
221	pVM->patm.s.savedstate.pSSM = pSSM;
222
223	/*
224	* Reset HC pointers that need to be recalculated when loading the state
225	*/
226	patmInfo.pPatchMemHC = NULL;
227	patmInfo.pGCStateHC = 0;
228	patmInfo.pvFaultMonitor = 0;
229
230	Assert(patmInfo.ulCallDepth == 0);
231
232	/*
233	* Count the number of patches in the tree (feeling lazy)
234	*/
235	patmInfo.savedstate.cPatches = 0;
236	RTAvloU32DoWithAll(&pVM->patm.s.PatchLookupTreeHC->PatchTree, true, patmCountPatch, &patmInfo.savedstate.cPatches);
237
238	/*
239	* Save PATM structure
240	*/
241	rc = SSMR3PutMem(pSSM, &patmInfo, sizeof(patmInfo));
242	AssertRCReturn(rc, rc);
243
244	/*
245	* Save patch memory contents
246	*/
247	rc = SSMR3PutMem(pSSM, pVM->patm.s.pPatchMemHC, pVM->patm.s.cbPatchMem);
248	AssertRCReturn(rc, rc);
249
250	/*
251	* Save GC state memory
252	*/
253	rc = SSMR3PutMem(pSSM, pVM->patm.s.pGCStateHC, sizeof(PATMGCSTATE));
254	AssertRCReturn(rc, rc);
255
256	/*
257	* Save PATM stack page
258	*/
259	rc = SSMR3PutMem(pSSM, pVM->patm.s.pGCStackHC, PATM_STACK_TOTAL_SIZE);
260	AssertRCReturn(rc, rc);
261
262	/*
263	* Save all patches
264	*/
265	rc = RTAvloU32DoWithAll(&pVM->patm.s.PatchLookupTreeHC->PatchTree, true, patmSavePatchState, pVM);
266	AssertRCReturn(rc, rc);
267
268	/** @note patch statistics are not saved. */
269
270	return VINF_SUCCESS;
271	}
272
273	/**
274	* Execute state load operation.
275	*
276	* @returns VBox status code.
277	* @param pVM VM Handle.
278	* @param pSSM SSM operation handle.
279	* @param u32Version Data layout version.
280	*/
281	DECLCALLBACK(int) patmr3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t u32Version)
282	{
283	PATM patmInfo;
284	int rc;
285
286	if ( u32Version != PATM_SSM_VERSION
287	&& u32Version != PATM_SSM_VERSION_VER16
288	#ifdef PATM_WITH_NEW_SSM
289	&& u32Version != PATM_SSM_VERSION_GETPUTMEM)
290	#else
291	)
292	#endif
293	{
294	AssertMsgFailed(("patmR3Load: Invalid version u32Version=%d!\n", u32Version));
295	return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
296	}
297
298	pVM->patm.s.savedstate.pSSM = pSSM;
299
300	/*
301	* Restore PATM structure
302	*/
303	#ifdef PATM_WITH_NEW_SSM
304	if (u32Version == PATM_SSM_VERSION_GETPUTMEM)
305	{
306	#endif
307	rc = SSMR3GetMem(pSSM, &patmInfo, sizeof(patmInfo));
308	AssertRCReturn(rc, rc);
309	#ifdef PATM_WITH_NEW_SSM
310	}
311	else
312	{
313	memset(&patmInfo, 0, sizeof(patmInfo));
314
315	AssertCompile(sizeof(patmInfo.pGCStateGC) == sizeof(RTRCPTR));
316	rc = SSMR3GetRCPtr(pSSM, &patmInfo.pGCStateGC);
317	AssertRCReturn(rc, rc);
318
319	AssertCompile(sizeof(patmInfo.pCPUMCtxGC) == sizeof(RTRCPTR));
320	rc = SSMR3GetRCPtr(pSSM, &patmInfo.pCPUMCtxGC);
321	AssertRCReturn(rc, rc);
322
323	AssertCompile(sizeof(patmInfo.pStatsGC) == sizeof(RTRCPTR));
324	rc = SSMR3GetRCPtr(pSSM, &patmInfo.pStatsGC);
325	AssertRCReturn(rc, rc);
326
327	AssertCompile(sizeof(patmInfo.pfnHelperCallGC) == sizeof(RTRCPTR));
328	rc = SSMR3GetRCPtr(pSSM, &patmInfo.pfnHelperCallGC);
329	AssertRCReturn(rc, rc);
330
331	AssertCompile(sizeof(patmInfo.pfnHelperRetGC) == sizeof(RTRCPTR));
332	rc = SSMR3GetRCPtr(pSSM, &patmInfo.pfnHelperRetGC);
333	AssertRCReturn(rc, rc);
334
335	AssertCompile(sizeof(patmInfo.pfnHelperJumpGC) == sizeof(RTRCPTR));
336	rc = SSMR3GetRCPtr(pSSM, &patmInfo.pfnHelperJumpGC);
337	AssertRCReturn(rc, rc);
338
339	AssertCompile(sizeof(patmInfo.pfnHelperIretGC) == sizeof(RTRCPTR));
340	rc = SSMR3GetRCPtr(pSSM, &patmInfo.pfnHelperIretGC);
341	AssertRCReturn(rc, rc);
342
343	AssertCompile(sizeof(patmInfo.pPatchMemGC) == sizeof(RTRCPTR));
344	rc = SSMR3GetRCPtr(pSSM, &patmInfo.pPatchMemGC);
345	AssertRCReturn(rc, rc);
346
347	AssertCompile(sizeof(patmInfo.cbPatchMem) == sizeof(uint32_t));
348	rc = SSMR3GetU32(pSSM, &patmInfo.cbPatchMem);
349	AssertRCReturn(rc, rc);
350
351	AssertCompile(sizeof(patmInfo.offPatchMem) == sizeof(uint32_t));
352	rc = SSMR3GetU32(pSSM, &patmInfo.offPatchMem);
353	AssertRCReturn(rc, rc);
354
355	AssertCompile(sizeof(patmInfo.deltaReloc) == sizeof(int32_t));
356	rc = SSMR3GetS32(pSSM, &patmInfo.deltaReloc);
357	AssertRCReturn(rc, rc);
358
359	AssertCompile(sizeof(patmInfo.uCurrentPatchIdx) == sizeof(uint32_t));
360	rc = SSMR3GetS32(pSSM, &patmInfo.uCurrentPatchIdx);
361	AssertRCReturn(rc, rc);
362
363	AssertCompile(sizeof(patmInfo.pPatchedInstrGCLowest) == sizeof(RTRCPTR));
364	rc = SSMR3GetRCPtr(pSSM, &patmInfo.pPatchedInstrGCLowest);
365	AssertRCReturn(rc, rc);
366
367	AssertCompile(sizeof(patmInfo.pPatchedInstrGCHighest) == sizeof(RTRCPTR));
368	rc = SSMR3GetRCPtr(pSSM, &patmInfo.pPatchedInstrGCHighest);
369	AssertRCReturn(rc, rc);
370
371	AssertCompile(sizeof(patmInfo.pfnSysEnterGC) == sizeof(RTRCPTR));
372	rc = SSMR3GetRCPtr(pSSM, &patmInfo.pfnSysEnterGC);
373	AssertRCReturn(rc, rc);
374
375	AssertCompile(sizeof(patmInfo.pfnSysEnterPatchGC) == sizeof(RTRCPTR));
376	rc = SSMR3GetRCPtr(pSSM, &patmInfo.pfnSysEnterPatchGC);
377	AssertRCReturn(rc, rc);
378
379	AssertCompile(sizeof(patmInfo.uSysEnterPatchIdx) == sizeof(uint32_t));
380	rc = SSMR3GetU32(pSSM, &patmInfo.uSysEnterPatchIdx);
381	AssertRCReturn(rc, rc);
382
383	AssertCompile(sizeof(patmInfo.ulCallDepth) == sizeof(uint32_t));
384	rc = SSMR3GetU32(pSSM, &patmInfo.ulCallDepth);
385	AssertRCReturn(rc, rc);
386
387	AssertCompile(sizeof(patmInfo.pGCStackGC) == sizeof(RTRCPTR));
388	rc = SSMR3GetRCPtr(pSSM, &patmInfo.pGCStackGC);
389	AssertRCReturn(rc, rc);
390
391	AssertCompile(sizeof(patmInfo.cPageRecords) == sizeof(uint32_t));
392	rc = SSMR3GetU32(pSSM, &patmInfo.cPageRecords);
393	AssertRCReturn(rc, rc);
394
395	AssertCompile(sizeof(patmInfo.fOutOfMemory) == sizeof(bool));
396	rc = SSMR3GetBool(pSSM, &patmInfo.fOutOfMemory);
397	AssertRCReturn(rc, rc);
398
399	AssertCompile(sizeof(patmInfo.savedstate.cPatches) == sizeof(uint32_t));
400	rc = SSMR3GetU32(pSSM, &patmInfo.savedstate.cPatches);
401	AssertRCReturn(rc, rc);
402
403	}
404	#endif
405
406	/* Relative calls are made to the helper functions. Therefor their relative location must not change! */
407	/* Note: we reuse the saved global helpers and assume they are identical, which is kind of dangerous. */
408	if ( (pVM->patm.s.pfnHelperCallGC - pVM->patm.s.pPatchMemGC) != (patmInfo.pfnHelperCallGC - patmInfo.pPatchMemGC)
409	\|\| (pVM->patm.s.pfnHelperRetGC - pVM->patm.s.pPatchMemGC) != (patmInfo.pfnHelperRetGC - patmInfo.pPatchMemGC)
410	\|\| (pVM->patm.s.pfnHelperJumpGC - pVM->patm.s.pPatchMemGC) != (patmInfo.pfnHelperJumpGC - patmInfo.pPatchMemGC)
411	\|\| (pVM->patm.s.pfnHelperIretGC - pVM->patm.s.pPatchMemGC) != (patmInfo.pfnHelperIretGC - patmInfo.pPatchMemGC))
412	{
413	AssertMsgFailed(("Helper function ptrs don't match!!!\n"));
414	return VERR_SSM_INVALID_STATE;
415	}
416
417	if (pVM->patm.s.cbPatchMem != patmInfo.cbPatchMem)
418	{
419	AssertMsgFailed(("Patch memory ptrs and/or sizes don't match!!!\n"));
420	return VERR_SSM_INVALID_STATE;
421	}
422	pVM->patm.s.offPatchMem = patmInfo.offPatchMem;
423	pVM->patm.s.deltaReloc = patmInfo.deltaReloc;
424	pVM->patm.s.uCurrentPatchIdx = patmInfo.uCurrentPatchIdx;
425	pVM->patm.s.fOutOfMemory = patmInfo.fOutOfMemory;
426
427	/* Lowest and highest patched instruction */
428	pVM->patm.s.pPatchedInstrGCLowest = patmInfo.pPatchedInstrGCLowest;
429	pVM->patm.s.pPatchedInstrGCHighest = patmInfo.pPatchedInstrGCHighest;
430
431	/* Sysenter handlers */
432	pVM->patm.s.pfnSysEnterGC = patmInfo.pfnSysEnterGC;
433	pVM->patm.s.pfnSysEnterPatchGC = patmInfo.pfnSysEnterPatchGC;
434	pVM->patm.s.uSysEnterPatchIdx = patmInfo.uSysEnterPatchIdx;
435
436	Assert(patmInfo.ulCallDepth == 0 && pVM->patm.s.ulCallDepth == 0);
437
438	Log(("pGCStateGC %VRv vs old %VRv\n", pVM->patm.s.pGCStateGC, patmInfo.pGCStateGC));
439	Log(("pGCStackGC %VRv vs old %VRv\n", pVM->patm.s.pGCStackGC, patmInfo.pGCStackGC));
440	Log(("pCPUMCtxGC %VRv vs old %VRv\n", pVM->patm.s.pCPUMCtxGC, patmInfo.pCPUMCtxGC));
441
442	/** @note patch statistics are not restored. */
443
444	/*
445	* Restore patch memory contents
446	*/
447	Log(("Restore patch memory: new %VRv old %VRv\n", pVM->patm.s.pPatchMemGC, patmInfo.pPatchMemGC));
448	rc = SSMR3GetMem(pSSM, pVM->patm.s.pPatchMemHC, pVM->patm.s.cbPatchMem);
449	AssertRCReturn(rc, rc);
450
451	/*
452	* Restore GC state memory
453	*/
454	#ifdef PATM_WITH_NEW_SSM
455	if (u32Version == PATM_SSM_VERSION_GETPUTMEM)
456	{
457	#endif
458	rc = SSMR3GetMem(pSSM, pVM->patm.s.pGCStateHC, sizeof(PATMGCSTATE));
459	AssertRCReturn(rc, rc);
460	#ifdef PATM_WITH_NEW_SSM
461	}
462	else
463	{
464	AssertCompile(sizeof(pVM->patm.s.pGCStateHC->uVMFlags) == sizeof(uint32_t));
465	rc = SSMR3GetU32(pSSM, &pVM->patm.s.pGCStateHC->uVMFlags);
466	AssertRCReturn(rc, rc);
467
468	AssertCompile(sizeof(pVM->patm.s.pGCStateHC->uPendingAction) == sizeof(uint32_t));
469	rc = SSMR3GetU32(pSSM, &pVM->patm.s.pGCStateHC->uPendingAction);
470	AssertRCReturn(rc, rc);
471
472	AssertCompile(sizeof(pVM->patm.s.pGCStateHC->uPatchCalls) == sizeof(uint32_t));
473	rc = SSMR3GetU32(pSSM, &pVM->patm.s.pGCStateHC->uPatchCalls);
474	AssertRCReturn(rc, rc);
475
476	AssertCompile(sizeof(pVM->patm.s.pGCStateHC->uScratch) == sizeof(uint32_t));
477	rc = SSMR3GetU32(pSSM, &pVM->patm.s.pGCStateHC->uScratch);
478	AssertRCReturn(rc, rc);
479
480	AssertCompile(sizeof(pVM->patm.s.pGCStateHC->uIretEFlags) == sizeof(uint32_t));
481	rc = SSMR3GetU32(pSSM, &pVM->patm.s.pGCStateHC->uIretEFlags);
482	AssertRCReturn(rc, rc);
483
484	AssertCompile(sizeof(pVM->patm.s.pGCStateHC->uIretCS) == sizeof(uint32_t));
485	rc = SSMR3GetU32(pSSM, &pVM->patm.s.pGCStateHC->uIretCS);
486	AssertRCReturn(rc, rc);
487
488	AssertCompile(sizeof(pVM->patm.s.pGCStateHC->uIretEIP) == sizeof(uint32_t));
489	rc = SSMR3GetU32(pSSM, &pVM->patm.s.pGCStateHC->uIretEIP);
490	AssertRCReturn(rc, rc);
491
492	AssertCompile(sizeof(pVM->patm.s.pGCStateHC->Psp) == sizeof(uint32_t));
493	rc = SSMR3GetU32(pSSM, &pVM->patm.s.pGCStateHC->Psp);
494	AssertRCReturn(rc, rc);
495
496	AssertCompile(sizeof(pVM->patm.s.pGCStateHC->fPIF) == sizeof(uint32_t));
497	rc = SSMR3GetU32(pSSM, &pVM->patm.s.pGCStateHC->fPIF);
498	AssertRCReturn(rc, rc);
499
500	AssertCompile(sizeof(pVM->patm.s.pGCStateHC->GCPtrInhibitInterrupts) == sizeof(RTRCPTR));
501	rc = SSMR3GetRCPtr(pSSM, &pVM->patm.s.pGCStateHC->GCPtrInhibitInterrupts);
502	AssertRCReturn(rc, rc);
503
504	AssertCompile(sizeof(pVM->patm.s.pGCStateHC->GCCallPatchTargetAddr) == sizeof(RTRCPTR));
505	rc = SSMR3GetRCPtr(pSSM, &pVM->patm.s.pGCStateHC->GCCallPatchTargetAddr);
506	AssertRCReturn(rc, rc);
507
508	AssertCompile(sizeof(pVM->patm.s.pGCStateHC->GCCallReturnAddr) == sizeof(RTRCPTR));
509	rc = SSMR3GetRCPtr(pSSM, &pVM->patm.s.pGCStateHC->GCCallReturnAddr);
510	AssertRCReturn(rc, rc);
511
512	AssertCompile(sizeof(pVM->patm.s.pGCStateHC->Restore.uEAX) == sizeof(uint32_t));
513	rc = SSMR3GetU32(pSSM, &pVM->patm.s.pGCStateHC->Restore.uEAX);
514	AssertRCReturn(rc, rc);
515
516	AssertCompile(sizeof(pVM->patm.s.pGCStateHC->Restore.uECX) == sizeof(uint32_t));
517	rc = SSMR3GetU32(pSSM, &pVM->patm.s.pGCStateHC->Restore.uECX);
518	AssertRCReturn(rc, rc);
519
520	AssertCompile(sizeof(pVM->patm.s.pGCStateHC->Restore.uEDI) == sizeof(uint32_t));
521	rc = SSMR3GetU32(pSSM, &pVM->patm.s.pGCStateHC->Restore.uEDI);
522	AssertRCReturn(rc, rc);
523
524	AssertCompile(sizeof(pVM->patm.s.pGCStateHC->Restore.eFlags) == sizeof(uint32_t));
525	rc = SSMR3GetU32(pSSM, &pVM->patm.s.pGCStateHC->Restore.eFlags);
526	AssertRCReturn(rc, rc);
527
528	AssertCompile(sizeof(pVM->patm.s.pGCStateHC->Restore.uFlags) == sizeof(uint32_t));
529	rc = SSMR3GetU32(pSSM, &pVM->patm.s.pGCStateHC->Restore.uFlags);
530	AssertRCReturn(rc, rc);
531	}
532	#endif
533
534	/*
535	* Restore PATM stack page
536	*/
537	rc = SSMR3GetMem(pSSM, pVM->patm.s.pGCStackHC, PATM_STACK_TOTAL_SIZE);
538	AssertRCReturn(rc, rc);
539
540	/*
541	* Load all patches
542	*/
543	for (uint32_t i=0;i<patmInfo.savedstate.cPatches;i++)
544	{
545	PATMPATCHREC patch, *pPatchRec;
546
547	rc = SSMR3GetMem(pSSM, &patch, sizeof(patch));
548	AssertRCReturn(rc, rc);
549
550	Assert(!(patch.patch.flags & PATMFL_GLOBAL_FUNCTIONS));
551
552	rc = MMHyperAlloc(pVM, sizeof(PATMPATCHREC), 0, MM_TAG_PATM_PATCH, (void **)&pPatchRec);
553	if (VBOX_FAILURE(rc))
554	{
555	AssertMsgFailed(("Out of memory!!!!\n"));
556	return VERR_NO_MEMORY;
557	}
558	/*
559	* Only restore the patch part of the tree record; not the internal data (except the key of course)
560	*/
561	pPatchRec->patch = patch.patch;
562	pPatchRec->Core.Key = patch.Core.Key;
563	pPatchRec->CoreOffset.Key = patch.CoreOffset.Key;
564
565	Log(("Restoring patch %VRv -> %VRv\n", pPatchRec->patch.pPrivInstrGC, patmInfo.pPatchMemGC + pPatchRec->patch.pPatchBlockOffset));
566	bool ret = RTAvloU32Insert(&pVM->patm.s.PatchLookupTreeHC->PatchTree, &pPatchRec->Core);
567	Assert(ret);
568	if (pPatchRec->patch.uState != PATCH_REFUSED)
569	{
570	if (pPatchRec->patch.pPatchBlockOffset)
571	{
572	/* We actually generated code for this patch. */
573	ret = RTAvloU32Insert(&pVM->patm.s.PatchLookupTreeHC->PatchTreeByPatchAddr, &pPatchRec->CoreOffset);
574	AssertMsg(ret, ("Inserting patch %VGv offset %VGv failed!!\n", pPatchRec->patch.pPrivInstrGC, pPatchRec->CoreOffset.Key));
575	}
576	}
577	/* Set to zero as we don't need it anymore. */
578	pPatchRec->patch.pTempInfo = 0;
579
580	pPatchRec->patch.pPrivInstrHC = 0;
581	/* The GC virtual ptr is fixed, but we must convert it manually again to HC. */
582	rc = PGMPhysGCPtr2HCPtr(pVM, pPatchRec->patch.pPrivInstrGC, (PRTHCPTR)&pPatchRec->patch.pPrivInstrHC);
583	/* Can fail due to page or page table not present. */
584
585	/*
586	* Restore fixup records and correct HC pointers in fixup records
587	*/
588	pPatchRec->patch.FixupTree = 0;
589	pPatchRec->patch.nrFixups = 0; /* increased by patmPatchAddReloc32 */
590	for (int i=0;i<patch.patch.nrFixups;i++)
591	{
592	RELOCREC rec;
593	int32_t offset;
594	RTRCPTR *pFixup;
595
596	rc = SSMR3GetMem(pSSM, &rec, sizeof(rec));
597	AssertRCReturn(rc, rc);
598
599	/* rec.pRelocPos now contains the relative position inside the hypervisor area. */
600	offset = (int32_t)(int64_t)rec.pRelocPos;
601	/* Convert to HC pointer again. */
602	PATM_ADD_PTR(rec.pRelocPos, pVM->patm.s.pPatchMemHC);
603	pFixup = (RTRCPTR *)rec.pRelocPos;
604
605	if (pPatchRec->patch.uState != PATCH_REFUSED)
606	{
607	if ( rec.uType == FIXUP_REL_JMPTOPATCH
608	&& (pPatchRec->patch.flags & PATMFL_PATCHED_GUEST_CODE))
609	{
610	Assert(pPatchRec->patch.cbPatchJump == SIZEOF_NEARJUMP32 \|\| pPatchRec->patch.cbPatchJump == SIZEOF_NEAR_COND_JUMP32);
611	unsigned offset = (pPatchRec->patch.cbPatchJump == SIZEOF_NEARJUMP32) ? 1 : 2;
612
613	Assert(pPatchRec->patch.pPrivInstrHC);
614	rec.pRelocPos = pPatchRec->patch.pPrivInstrHC + offset;
615	pFixup = (RTRCPTR *)rec.pRelocPos;
616	}
617
618	patmCorrectFixup(pVM, u32Version, patmInfo, &pPatchRec->patch, &rec, offset, pFixup);
619	}
620
621	rc = patmPatchAddReloc32(pVM, &pPatchRec->patch, rec.pRelocPos, rec.uType, rec.pSource, rec.pDest);
622	AssertRCReturn(rc, rc);
623	}
624
625	/* And all patch to guest lookup records */
626	Assert(pPatchRec->patch.nrPatch2GuestRecs \|\| pPatchRec->patch.uState == PATCH_REFUSED \|\| (pPatchRec->patch.flags & (PATMFL_SYSENTER_XP \| PATMFL_IDTHANDLER \| PATMFL_TRAPHANDLER \| PATMFL_INT3_REPLACEMENT)));
627
628	pPatchRec->patch.Patch2GuestAddrTree = 0;
629	pPatchRec->patch.Guest2PatchAddrTree = 0;
630	if (pPatchRec->patch.nrPatch2GuestRecs)
631	{
632	RECPATCHTOGUEST rec;
633	uint32_t nrPatch2GuestRecs = pPatchRec->patch.nrPatch2GuestRecs;
634
635	pPatchRec->patch.nrPatch2GuestRecs = 0; /* incremented by patmr3AddP2GLookupRecord */
636	for (uint32_t i=0;i<nrPatch2GuestRecs;i++)
637	{
638	rc = SSMR3GetMem(pSSM, &rec, sizeof(rec));
639	AssertRCReturn(rc, rc);
640
641	patmr3AddP2GLookupRecord(pVM, &pPatchRec->patch, (uintptr_t)rec.Core.Key + pVM->patm.s.pPatchMemHC, rec.pOrgInstrGC, rec.enmType, rec.fDirty);
642	}
643	Assert(pPatchRec->patch.Patch2GuestAddrTree);
644	}
645
646	if (pPatchRec->patch.flags & PATMFL_CODE_MONITORED)
647	{
648	/* Insert the guest page lookup records (for detection self-modifying code) */
649	rc = patmInsertPatchPages(pVM, &pPatchRec->patch);
650	AssertRCReturn(rc, rc);
651	}
652
653	#ifdef LOG_ENABLED
654	if ( pPatchRec->patch.uState != PATCH_REFUSED
655	&& !(pPatchRec->patch.flags & PATMFL_INT3_REPLACEMENT))
656	{
657	pPatchRec->patch.pTempInfo = (PPATCHINFOTEMP)MMR3HeapAllocZ(pVM, MM_TAG_PATM_PATCH, sizeof(PATCHINFOTEMP));
658	Log(("Patch code ----------------------------------------------------------\n"));
659	patmr3DisasmCodeStream(pVM, PATCHCODE_PTR_GC(&pPatchRec->patch), PATCHCODE_PTR_GC(&pPatchRec->patch), patmr3DisasmCallback, &pPatchRec->patch);
660	Log(("Patch code ends -----------------------------------------------------\n"));
661	MMR3HeapFree(pPatchRec->patch.pTempInfo);
662	pPatchRec->patch.pTempInfo = NULL;
663	}
664	#endif
665
666	}
667
668	/*
669	* Correct absolute fixups in the global patch. (helper functions)
670	* Bit of a mess. Uses the new patch record, but restored patch functions.
671	*/
672	PRELOCREC pRec = 0;
673	AVLPVKEY key = 0;
674
675	Log(("Correct fixups in global helper functions\n"));
676	while (true)
677	{
678	int32_t offset;
679	RTRCPTR *pFixup;
680
681	/* Get the record that's closest from above */
682	pRec = (PRELOCREC)RTAvlPVGetBestFit(&pVM->patm.s.pGlobalPatchRec->patch.FixupTree, key, true);
683	if (pRec == 0)
684	break;
685
686	key = (AVLPVKEY)(pRec->pRelocPos + 1); /* search for the next record during the next round. */
687
688	/* rec.pRelocPos now contains the relative position inside the hypervisor area. */
689	offset = (int32_t)(pRec->pRelocPos - pVM->patm.s.pPatchMemHC);
690	pFixup = (RTRCPTR *)pRec->pRelocPos;
691
692	/* Correct fixups that refer to PATM structures in the hypervisor region (their addresses might have changed). */
693	patmCorrectFixup(pVM, u32Version, patmInfo, &pVM->patm.s.pGlobalPatchRec->patch, pRec, offset, pFixup);
694	}
695
696	#ifdef VBOX_WITH_STATISTICS
697	/*
698	* Restore relevant old statistics
699	*/
700	pVM->patm.s.StatDisabled = patmInfo.StatDisabled;
701	pVM->patm.s.StatUnusable = patmInfo.StatUnusable;
702	pVM->patm.s.StatEnabled = patmInfo.StatEnabled;
703	pVM->patm.s.StatInstalled = patmInfo.StatInstalled;
704	#endif
705	return VINF_SUCCESS;
706	}
707
708	/**
709	* Correct fixups to predefined hypervisor PATM regions. (their addresses might have changed)
710	*
711	* @returns VBox status code.
712	* @param pVM VM Handle.
713	* @param ulSSMVersion SSM version
714	* @param patmInfo Saved PATM structure
715	* @param pPatch Patch record
716	* @param pRec Relocation record
717	* @param offset Offset of referenced data/code
718	* @param pFixup Fixup address
719	*/
720	static void patmCorrectFixup(PVM pVM, unsigned ulSSMVersion, PATM &patmInfo, PPATCHINFO pPatch, PRELOCREC pRec, int32_t offset, RTRCPTR *pFixup)
721	{
722	int32_t delta = pVM->patm.s.pPatchMemGC - patmInfo.pPatchMemGC;
723
724	switch (pRec->uType)
725	{
726	case FIXUP_ABSOLUTE:
727	{
728	if (pRec->pSource && !PATMIsPatchGCAddr(pVM, pRec->pSource))
729	break;
730
731	if ( patmInfo.pPatchMemGC + offset >= patmInfo.pGCStateGC
732	&& patmInfo.pPatchMemGC + offset < patmInfo.pGCStateGC + sizeof(PATMGCSTATE))
733	{
734	LogFlow(("Changing absolute GCState from %VRv (%VRv) to %VRv\n", patmInfo.pPatchMemGC + offset, pFixup, (pFixup - patmInfo.pGCStateGC) + pVM->patm.s.pGCStateGC));
735	pFixup = (pFixup - patmInfo.pGCStateGC) + pVM->patm.s.pGCStateGC;
736	}
737	else
738	if ( patmInfo.pPatchMemGC + offset >= patmInfo.pCPUMCtxGC
739	&& patmInfo.pPatchMemGC + offset < patmInfo.pCPUMCtxGC + sizeof(CPUMCTX))
740	{
741	LogFlow(("Changing absolute CPUMCTX from %VRv (%VRv) to %VRv\n", patmInfo.pPatchMemGC + offset, pFixup, (pFixup - patmInfo.pCPUMCtxGC) + pVM->patm.s.pCPUMCtxGC));
742
743	/* The CPUMCTX structure has completely changed, so correct the offsets too. */
744	if (ulSSMVersion == PATM_SSM_VERSION_VER16)
745	{
746	unsigned uCPUMOffset = *pFixup - patmInfo.pCPUMCtxGC;
747
748	switch(uCPUMOffset)
749	{
750	case RT_OFFSETOF(CPUMCTX_VER1_6, dr0):
751	Log(("Changing dr0 offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, dr0)));
752	*pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr0);
753	break;
754	case RT_OFFSETOF(CPUMCTX_VER1_6, dr1):
755	Log(("Changing dr1 offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, dr1)));
756	*pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr1);
757	break;
758	case RT_OFFSETOF(CPUMCTX_VER1_6, dr2):
759	Log(("Changing dr2 offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, dr2)));
760	*pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr2);
761	break;
762	case RT_OFFSETOF(CPUMCTX_VER1_6, dr3):
763	Log(("Changing dr3 offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, dr3)));
764	*pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr3);
765	break;
766	case RT_OFFSETOF(CPUMCTX_VER1_6, dr4):
767	Log(("Changing dr4 offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, dr4)));
768	*pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr4);
769	break;
770	case RT_OFFSETOF(CPUMCTX_VER1_6, dr5):
771	Log(("Changing dr5 offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, dr5)));
772	*pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr5);
773	break;
774	case RT_OFFSETOF(CPUMCTX_VER1_6, dr6):
775	Log(("Changing dr6 offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, dr6)));
776	*pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr6);
777	break;
778	case RT_OFFSETOF(CPUMCTX_VER1_6, dr7):
779	Log(("Changing dr7 offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, dr7)));
780	*pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, dr7);
781	break;
782	case RT_OFFSETOF(CPUMCTX_VER1_6, cr0):
783	Log(("Changing cr0 offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, cr0)));
784	*pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, cr0);
785	break;
786	case RT_OFFSETOF(CPUMCTX_VER1_6, cr2):
787	Log(("Changing cr2 offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, cr2)));
788	*pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, cr2);
789	break;
790	case RT_OFFSETOF(CPUMCTX_VER1_6, cr3):
791	Log(("Changing cr3 offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, cr3)));
792	*pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, cr3);
793	break;
794	case RT_OFFSETOF(CPUMCTX_VER1_6, cr4):
795	Log(("Changing cr4 offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, cr4)));
796	*pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, cr4);
797	break;
798	case RT_OFFSETOF(CPUMCTX_VER1_6, tr):
799	Log(("Changing tr offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, tr)));
800	*pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, tr);
801	break;
802	case RT_OFFSETOF(CPUMCTX_VER1_6, ldtr):
803	Log(("Changing ldtr offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, ldtr)));
804	*pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, ldtr);
805	break;
806	case RT_OFFSETOF(CPUMCTX_VER1_6, gdtr.pGdt):
807	Log(("Changing pGdt offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, gdtr.pGdt)));
808	*pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, gdtr.pGdt);
809	break;
810	case RT_OFFSETOF(CPUMCTX_VER1_6, gdtr.cbGdt):
811	Log(("Changing cbGdt offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, gdtr.cbGdt)));
812	*pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, gdtr.cbGdt);
813	break;
814	case RT_OFFSETOF(CPUMCTX_VER1_6, idtr.pIdt):
815	Log(("Changing pIdt offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, idtr.pIdt)));
816	*pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, idtr.pIdt);
817	break;
818	case RT_OFFSETOF(CPUMCTX_VER1_6, idtr.cbIdt):
819	Log(("Changing cbIdt offset from %x to %x\n", uCPUMOffset, RT_OFFSETOF(CPUMCTX, idtr.cbIdt)));
820	*pFixup = pVM->patm.s.pCPUMCtxGC + RT_OFFSETOF(CPUMCTX, idtr.cbIdt);
821	break;
822	default:
823	AssertFailed();
824	break;
825	}
826	}
827	else
828	pFixup = (pFixup - patmInfo.pCPUMCtxGC) + pVM->patm.s.pCPUMCtxGC;
829	}
830	else
831	if ( patmInfo.pPatchMemGC + offset >= patmInfo.pStatsGC
832	&& patmInfo.pPatchMemGC + offset < patmInfo.pStatsGC + sizeof(CPUMCTX))
833	{
834	LogFlow(("Changing absolute Stats from %VRv (%VRv) to %VRv\n", patmInfo.pPatchMemGC + offset, pFixup, (pFixup - patmInfo.pStatsGC) + pVM->patm.s.pStatsGC));
835	pFixup = (pFixup - patmInfo.pStatsGC) + pVM->patm.s.pStatsGC;
836	}
837	else
838	if ( patmInfo.pPatchMemGC + offset >= patmInfo.pGCStackGC
839	&& patmInfo.pPatchMemGC + offset < patmInfo.pGCStackGC + PATM_STACK_TOTAL_SIZE)
840	{
841	LogFlow(("Changing absolute Stack from %VRv (%VRv) to %VRv\n", patmInfo.pPatchMemGC + offset, pFixup, (pFixup - patmInfo.pGCStackGC) + pVM->patm.s.pGCStackGC));
842	pFixup = (pFixup - patmInfo.pGCStackGC) + pVM->patm.s.pGCStackGC;
843	}
844	else
845	if ( patmInfo.pPatchMemGC + offset >= patmInfo.pPatchMemGC
846	&& patmInfo.pPatchMemGC + offset < patmInfo.pPatchMemGC + patmInfo.cbPatchMem)
847	{
848	LogFlow(("Changing absolute PatchMem from %VRv (%VRv) to %VRv\n", patmInfo.pPatchMemGC + offset, pFixup, (pFixup - patmInfo.pPatchMemGC) + pVM->patm.s.pPatchMemGC));
849	pFixup = (pFixup - patmInfo.pPatchMemGC) + pVM->patm.s.pPatchMemGC;
850	}
851	else
852	AssertFailed();
853	break;
854	}
855
856	case FIXUP_REL_JMPTOPATCH:
857	{
858	RTRCPTR pTarget = (RTRCPTR)((RTRCINTPTR)pRec->pDest + delta);
859
860	if ( pPatch->uState == PATCH_ENABLED
861	&& (pPatch->flags & PATMFL_PATCHED_GUEST_CODE))
862	{
863	uint8_t oldJump[SIZEOF_NEAR_COND_JUMP32];
864	uint8_t temp[SIZEOF_NEAR_COND_JUMP32];
865	RTRCPTR pJumpOffGC;
866	RTRCINTPTR displ = (RTRCINTPTR)pTarget - (RTRCINTPTR)pRec->pSource;
867	RTRCINTPTR displOld= (RTRCINTPTR)pRec->pDest - (RTRCINTPTR)pRec->pSource;
868
869	Log(("Relative fixup (g2p) %08X -> %08X at %08X (source=%08x, target=%08x)\n", (int32_t)pRec->pRelocPos, displ, pRec->pRelocPos, pRec->pSource, pRec->pDest));
870
871	Assert(pRec->pSource - pPatch->cbPatchJump == pPatch->pPrivInstrGC);
872	#ifdef PATM_RESOLVE_CONFLICTS_WITH_JUMP_PATCHES
873	if (pPatch->cbPatchJump == SIZEOF_NEAR_COND_JUMP32)
874	{
875	Assert(pPatch->flags & PATMFL_JUMP_CONFLICT);
876
877	pJumpOffGC = pPatch->pPrivInstrGC + 2; //two byte opcode
878	oldJump[0] = pPatch->aPrivInstr[0];
879	oldJump[1] = pPatch->aPrivInstr[1];
880	(RTRCUINTPTR )&oldJump[2] = displOld;
881	}
882	else
883	#endif
884	if (pPatch->cbPatchJump == SIZEOF_NEARJUMP32)
885	{
886	pJumpOffGC = pPatch->pPrivInstrGC + 1; //one byte opcode
887	oldJump[0] = 0xE9;
888	(RTRCUINTPTR )&oldJump[1] = displOld;
889	}
890	else
891	{
892	AssertMsgFailed(("Invalid patch jump size %d\n", pPatch->cbPatchJump));
893	break;
894	}
895	Assert(pPatch->cbPatchJump <= sizeof(temp));
896
897	/*
898	* Read old patch jump and compare it to the one we previously installed
899	*/
900	int rc = PGMPhysReadGCPtr(pVM, temp, pPatch->pPrivInstrGC, pPatch->cbPatchJump);
901	Assert(VBOX_SUCCESS(rc) \|\| rc == VERR_PAGE_NOT_PRESENT \|\| rc == VERR_PAGE_TABLE_NOT_PRESENT);
902
903	if (rc == VERR_PAGE_NOT_PRESENT \|\| rc == VERR_PAGE_TABLE_NOT_PRESENT)
904	{
905	RTRCPTR pPage = pPatch->pPrivInstrGC & PAGE_BASE_GC_MASK;
906
907	rc = PGMR3HandlerVirtualRegister(pVM, PGMVIRTHANDLERTYPE_ALL, pPage, pPage + (PAGE_SIZE - 1) /* inclusive! */, 0, patmVirtPageHandler, "PATMGCMonitorPage", 0, "PATMMonitorPatchJump");
908	Assert(VBOX_SUCCESS(rc) \|\| rc == VERR_PGM_HANDLER_VIRTUAL_CONFLICT);
909	}
910	else
911	if (memcmp(temp, oldJump, pPatch->cbPatchJump))
912	{
913	Log(("PATM: Patch jump was overwritten -> disabling patch!!\n"));
914	/*
915	* Disable patch; this is not a good solution
916	*/
917	/* @todo hopefully it was completely overwritten (if the read was successful)!!!! */
918	pPatch->uState = PATCH_DISABLED;
919	}
920	else
921	if (VBOX_SUCCESS(rc))
922	{
923	rc = PGMPhysWriteGCPtrDirty(pVM, pJumpOffGC, &displ, sizeof(displ));
924	AssertRC(rc);
925	}
926	else
927	{
928	AssertMsgFailed(("Unexpected error %d from MMR3PhysReadGCVirt\n", rc));
929	}
930	}
931	else
932	{
933	Log(("Skip the guest jump to patch code for this disabled patch %08X - %08X\n", pPatch->pPrivInstrHC, pRec->pRelocPos));
934	}
935
936	pRec->pDest = pTarget;
937	break;
938	}
939
940	case FIXUP_REL_JMPTOGUEST:
941	{
942	RTRCPTR pSource = (RTRCPTR)((RTRCINTPTR)pRec->pSource + delta);
943	RTRCINTPTR displ = (RTRCINTPTR)pRec->pDest - (RTRCINTPTR)pSource;
944
945	Assert(!(pPatch->flags & PATMFL_GLOBAL_FUNCTIONS));
946	Log(("Relative fixup (p2g) %08X -> %08X at %08X (source=%08x, target=%08x)\n", (int32_t)pRec->pRelocPos, displ, pRec->pRelocPos, pRec->pSource, pRec->pDest));
947	(RTRCUINTPTR )pRec->pRelocPos = displ;
948	pRec->pSource = pSource;
949	break;
950
951	}
952	}
953	}
954

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source: vbox/trunk/src/VBox/VMM/PATM/PATMSSM.cpp@ 11972

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