PATMInternal.h@ 850

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1	/* $Id: PATMInternal.h 742 2007-02-07 10:17:01Z vboxsync $ */
2	/** @file
3	* PATM - Internal header file.
4	*/
5
6	/*
7	* Copyright (C) 2006 InnoTek Systemberatung GmbH
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License as published by the Free Software Foundation,
13	* in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
14	* distribution. VirtualBox OSE is distributed in the hope that it will
15	* be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* If you received this file as part of a commercial VirtualBox
18	* distribution, then only the terms of your commercial VirtualBox
19	* license agreement apply instead of the previous paragraph.
20	*/
21
22	#ifndef __PATMInternal_h__
23	#define __PATMInternal_h__
24
25	#include <VBox/cdefs.h>
26	#include <VBox/types.h>
27	#include <VBox/patm.h>
28	#include <VBox/stam.h>
29	#include <VBox/dis.h>
30	#include <iprt/avl.h>
31	#include <iprt/param.h>
32	#include <VBox/log.h>
33
34	#if !defined(IN_PATM_R3) && !defined(IN_PATM_R0) && !defined(IN_PATM_GC)
35	# error "Not in PATM! This is an internal header!"
36	#endif
37
38
39	#define PATM_SSM_VERSION 51
40
41	/* Enable for call patching. */
42	#define PATM_ENABLE_CALL
43	#define PATCH_MEMORY_SIZE (210241024)
44	#define MAX_PATCH_SIZE (1024*4)
45
46	/*
47	* Internal patch type flags (starts at BIT(11))
48	*/
49
50	#define PATMFL_CHECK_SIZE BIT64(11)
51	#define PATMFL_FOUND_PATCHEND BIT64(12)
52	#define PATMFL_SINGLE_INSTRUCTION BIT64(13)
53	#define PATMFL_SYSENTER_XP BIT64(14)
54	#define PATMFL_JUMP_CONFLICT BIT64(15)
55	#define PATMFL_READ_ORIGINAL_BYTES BIT64(16) /** opcode might have already been patched */
56	#define PATMFL_INT3_REPLACEMENT BIT64(17)
57	#define PATMFL_SUPPORT_CALLS BIT64(18)
58	#define PATMFL_SUPPORT_INDIRECT_CALLS BIT64(19)
59	#define PATMFL_IDTHANDLER_WITHOUT_ENTRYPOINT BIT64(20) /** internal flag to avoid duplicate entrypoints */
60	#define PATMFL_INHIBIT_IRQS BIT64(21) /** temporary internal flag */
61	#define PATMFL_GENERATE_JUMPTOGUEST BIT64(22) /** temporary internal flag */
62	#define PATMFL_RECOMPILE_NEXT BIT64(23) /** for recompilation of the next instruction */
63	#define PATMFL_CODE_MONITORED BIT64(24) /** code pages of guest monitored for self-modifying code. */
64	#define PATMFL_CALLABLE_AS_FUNCTION BIT64(25) /** cli and pushf blocks can be used as callable functions. */
65	#define PATMFL_GLOBAL_FUNCTIONS BIT64(26) /** fake patch for global patm functions. */
66	#define PATMFL_TRAMPOLINE BIT64(27) /** trampoline patch that clears PATM_INTERRUPTFLAG and jumps to patch destination */
67	#define PATMFL_GENERATE_SETPIF BIT64(28) /** generate set PIF for the next instruction */
68	#define PATMFL_INSTR_HINT BIT64(29) /** Generate patch, but don't activate it. */
69	#define PATMFL_PATCHED_GUEST_CODE BIT64(30) /** Patched guest code. */
70	#define PATMFL_MUST_INSTALL_PATCHJMP BIT64(31) /** Need to patch guest code in order to activate patch. */
71	#define PATMFL_INT3_REPLACEMENT_BLOCK BIT64(32) /** int 3 replacement block */
72
73	#define SIZEOF_NEARJUMP8 2 //opcode byte + 1 byte relative offset
74	#define SIZEOF_NEARJUMP16 3 //opcode byte + 2 byte relative offset
75	#define SIZEOF_NEARJUMP32 5 //opcode byte + 4 byte relative offset
76	#define SIZEOF_NEAR_COND_JUMP32 6 //0xF + opcode byte + 4 byte relative offset
77
78	#define MAX_INSTR_SIZE 16
79
80	//Patch states
81	#define PATCH_REFUSED 1
82	#define PATCH_DISABLED 2
83	#define PATCH_ENABLED 4
84	#define PATCH_UNUSABLE 8
85	#define PATCH_DIRTY 16
86	#define PATCH_DISABLE_PENDING 32
87
88
89	#define MAX_PATCH_TRAPS 4
90	#define PATM_MAX_CALL_DEPTH 32
91	/* Maximum nr of writes before a patch is marked dirty. (disabled) */
92	#define PATM_MAX_CODE_WRITES 16
93	/* Maximum nr of invalid writes before a patch is disabled. */
94	#define PATM_MAX_INVALID_WRITES 16384
95
96	#define FIXUP_ABSOLUTE 0
97	#define FIXUP_REL_JMPTOPATCH 1
98	#define FIXUP_REL_JMPTOGUEST 2
99
100	#define PATM_ILLEGAL_DESTINATION 0xDEADBEEF
101
102	/** Size of the instruction that's used for requests from patch code (currently only call) */
103	#define PATM_ILLEGAL_INSTR_SIZE 2
104
105
106	/** No statistics counter index allocated just yet */
107	#define PATM_STAT_INDEX_NONE (uint32_t)-1
108	/** Dummy counter to handle overflows */
109	#define PATM_STAT_INDEX_DUMMY 0
110	#define PATM_STAT_INDEX_IS_VALID(a) (a != PATM_STAT_INDEX_DUMMY && a != PATM_STAT_INDEX_NONE)
111
112	#ifdef VBOX_WITH_STATISTICS
113	#define PATM_STAT_RUN_INC(pPatch) \
114	if (PATM_STAT_INDEX_IS_VALID((pPatch)->uPatchIdx)) \
115	CTXSUFF(pVM->patm.s.pStats)[(pPatch)->uPatchIdx].u32A++;
116	#define PATM_STAT_FAULT_INC(pPatch) \
117	if (PATM_STAT_INDEX_IS_VALID((pPatch)->uPatchIdx)) \
118	CTXSUFF(pVM->patm.s.pStats)[(pPatch)->uPatchIdx].u32B++;
119	#else
120	#define PATM_STAT_RUN_INC(pPatch) do { } while (0)
121	#define PATM_STAT_FAULT_INC(pPatch) do { } while (0)
122	#endif
123
124	/** Maximum number of stat counters. */
125	#define PATM_STAT_MAX_COUNTERS 1024
126	/** Size of memory allocated for patch statistics. */
127	#define PATM_STAT_MEMSIZE (PATM_STAT_MAX_COUNTERS*sizeof(STAMRATIOU32))
128
129
130	typedef struct
131	{
132	/** The key is a HC virtual address. */
133	AVLPVNODECORE Core;
134
135	uint32_t uType;
136	HCPTRTYPE(uint8_t *)pRelocPos;
137	RTGCPTR pSource;
138	RTGCPTR pDest;
139	} RELOCREC, *PRELOCREC;
140
141	typedef struct
142	{
143	HCPTRTYPE(uint8_t *) pPatchLocStartHC;
144	HCPTRTYPE(uint8_t *) pPatchLocEndHC;
145	GCPTRTYPE(uint8_t *) pGuestLoc;
146	uint32_t opsize;
147	} P2GLOOKUPREC, *PP2GLOOKUPREC;
148
149	typedef struct
150	{
151	/** The key is a pointer to a JUMPREC structure. */
152	AVLPVNODECORE Core;
153
154	HCPTRTYPE(uint8_t *)pJumpHC;
155	GCPTRTYPE(uint8_t *)pTargetGC;
156	uint32_t offDispl;
157	uint32_t opcode;
158	} JUMPREC, *PJUMPREC;
159
160	/**
161	* Patch to guest lookup type (single or both direction)
162	*/
163	typedef enum
164	{
165	PATM_LOOKUP_PATCH2GUEST, /* patch to guest */
166	PATM_LOOKUP_BOTHDIR /* guest to patch + patch to guest */
167	} PATM_LOOKUP_TYPE;
168
169	/**
170	* Patch to guest address lookup record
171	*/
172	typedef struct RECPATCHTOGUEST
173	{
174	/** The key is an offset inside the patch memory block. */
175	AVLU32NODECORE Core;
176
177	RTGCPTR pOrgInstrGC;
178	PATM_LOOKUP_TYPE enmType;
179	bool fDirty;
180	uint8_t u8DirtyOpcode; /* original opcode before writing 0xCC there to mark it dirty */
181	} RECPATCHTOGUEST, *PRECPATCHTOGUEST;
182
183	/**
184	* Guest to patch address lookup record
185	*/
186	typedef struct RECGUESTTOPATCH
187	{
188	/** The key is a GC virtual address. */
189	AVLGCPTRNODECORE Core;
190
191	/** Patch offset (relative to PATM::pPatchMemGC / PATM::pPatchMemHC). */
192	uint32_t PatchOffset;
193	} RECGUESTTOPATCH, *PRECGUESTTOPATCH;
194
195	/**
196	* Temporary information used in ring 3 only; no need to waste memory in the patch record itself.
197	*/
198	typedef struct
199	{
200	/* Temporary tree for storing the addresses of illegal instructions. */
201	HCPTRTYPE(PAVLPVNODECORE) IllegalInstrTree;
202	uint32_t nrIllegalInstr;
203
204	int32_t nrJumps;
205	uint32_t nrRetInstr;
206
207	/* Temporary tree of encountered jumps. (debug only) */
208	HCPTRTYPE(PAVLPVNODECORE) DisasmJumpTree;
209
210	int32_t nrCalls;
211
212	/** Last original guest instruction pointer; used for disassmebly log. */
213	RTGCPTR pLastDisasmInstrGC;
214
215	/** Keeping track of multiple ret instructions. */
216	RTGCPTR pPatchRetInstrGC;
217	uint32_t uPatchRetParam1;
218	} PATCHINFOTEMP, *PPATCHINFOTEMP;
219
220	typedef struct _PATCHINFO
221	{
222	uint32_t uState;
223	uint32_t uOldState;
224	uint32_t uOpMode;
225
226	GCPTRTYPE(uint8_t *) pPrivInstrGC; //GC pointer of privileged instruction
227	HCPTRTYPE(uint8_t *) pPrivInstrHC; //HC pointer of privileged instruction
228	uint8_t aPrivInstr[MAX_INSTR_SIZE];
229	uint32_t cbPrivInstr;
230	uint32_t opcode; //opcode for priv instr (OP_*)
231	uint32_t cbPatchJump; //patch jump size
232
233	/* Only valid for PATMFL_JUMP_CONFLICT patches */
234	RTGCPTR pPatchJumpDestGC;
235
236	RTGCUINTPTR pPatchBlockOffset;
237	uint32_t cbPatchBlockSize;
238	uint32_t uCurPatchOffset;
239	#if HC_ARCH_BITS == 64
240	uint32_t Alignment0; /*< Align flags correctly. /
241	#endif
242
243	uint64_t flags;
244
245	/**
246	* Lowest and highest patched GC instruction address. To optimize searches.
247	*/
248	RTGCPTR pInstrGCLowest;
249	RTGCPTR pInstrGCHighest;
250
251	/* Tree of fixup records for the patch. */
252	HCPTRTYPE(PAVLPVNODECORE) FixupTree;
253	int32_t nrFixups;
254
255	/* Tree of jumps inside the generated patch code. */
256	int32_t nrJumpRecs;
257	HCPTRTYPE(PAVLPVNODECORE) JumpTree;
258
259	/**
260	* Lookup trees for determining the corresponding guest address of an
261	* instruction in the patch block.
262	*/
263	HCPTRTYPE(PAVLU32NODECORE) Patch2GuestAddrTree;
264	HCPTRTYPE(PAVLGCPTRNODECORE) Guest2PatchAddrTree;
265	uint32_t nrPatch2GuestRecs;
266	#if HC_ARCH_BITS == 64
267	uint32_t Alignment1;
268	#endif
269
270	// Cache record for PATMGCVirtToHCVirt
271	P2GLOOKUPREC cacheRec;
272
273	/* Temporary information during patch creation. Don't waste hypervisor memory for this. */
274	HCPTRTYPE(PPATCHINFOTEMP) pTempInfo;
275
276	/* Count the number of writes to the corresponding guest code. */
277	uint32_t cCodeWrites;
278
279	/* Count the number of invalid writes to pages monitored for the patch. */
280	//some statistics to determine if we should keep this patch activated
281	uint32_t cTraps;
282
283	uint32_t cInvalidWrites;
284
285	// Index into the uPatchRun and uPatchTrap arrays (0..MAX_PATCHES-1)
286	uint32_t uPatchIdx;
287
288	/* First opcode byte, that's overwritten when a patch is marked dirty. */
289	uint8_t bDirtyOpcode;
290	uint8_t Alignment2[7]; /*< Align the structure size on a 8-byte boundrary. /
291	} PATCHINFO, *PPATCHINFO;
292
293	#define PATCHCODE_PTR_GC(pPatch) (RTGCPTR) (pVM->patm.s.pPatchMemGC + (pPatch)->pPatchBlockOffset)
294	#define PATCHCODE_PTR_HC(pPatch) (uint8_t *)(pVM->patm.s.pPatchMemHC + (pPatch)->pPatchBlockOffset)
295
296	/**
297	* Lookup record for patches
298	*/
299	typedef struct PATMPATCHREC
300	{
301	/** The key is a GC virtual address. */
302	AVLOGCPTRNODECORE Core;
303	/** The key is a patch offset. */
304	AVLOGCPTRNODECORE CoreOffset;
305
306	PATCHINFO patch;
307	} PATMPATCHREC, *PPATMPATCHREC;
308
309	/** Increment for allocating room for pointer array */
310	#define PATMPATCHPAGE_PREALLOC_INCREMENT 16
311
312	/**
313	* Lookup record for patch pages
314	*/
315	typedef struct PATMPATCHPAGE
316	{
317	/** The key is a GC virtual address. */
318	AVLOGCPTRNODECORE Core;
319	/** Region to monitor. */
320	RTGCPTR pLowestAddrGC;
321	RTGCPTR pHighestAddrGC;
322	/** Number of patches for this page. */
323	uint32_t cCount;
324	/** Maximum nr of pointers in the array. */
325	uint32_t cMaxPatches;
326	/** Array of patch pointers for this page. */
327	HCPTRTYPE(PPATCHINFO *)aPatch;
328	} PATMPATCHPAGE, *PPATMPATCHPAGE;
329
330	#define PATM_PATCHREC_FROM_COREOFFSET(a) (PPATMPATCHREC)((uintptr_t)a - RT_OFFSETOF(PATMPATCHREC, CoreOffset))
331	#define PATM_PATCHREC_FROM_PATCHINFO(a) (PPATMPATCHREC)((uintptr_t)a - RT_OFFSETOF(PATMPATCHREC, patch))
332
333	typedef struct PATMTREES
334	{
335	/**
336	* AVL tree with all patches (active or disabled) sorted by guest instruction address
337	*/
338	AVLOGCPTRTREE PatchTree;
339
340	/**
341	* AVL tree with all patches sorted by patch address (offset actually)
342	*/
343	AVLOGCPTRTREE PatchTreeByPatchAddr;
344
345	/**
346	* AVL tree with all pages which were (partly) patched
347	*/
348	AVLOGCPTRTREE PatchTreeByPage;
349
350	uint32_t align[1];
351	} PATMTREES, *PPATMTREES;
352
353	/**
354	* PATM VM Instance data.
355	* Changes to this must checked against the padding of the patm union in VM!
356	*/
357	typedef struct PATM
358	{
359	/** Offset to the VM structure.
360	* See PATM2VM(). */
361	RTINT offVM;
362
363	GCPTRTYPE(uint8_t *) pPatchMemGC;
364	HCPTRTYPE(uint8_t *) pPatchMemHC;
365	uint32_t cbPatchMem;
366	uint32_t offPatchMem;
367	bool fOutOfMemory;
368
369	int32_t deltaReloc;
370
371	/* GC PATM state pointers */
372	HCPTRTYPE(PPATMGCSTATE) pGCStateHC;
373	GCPTRTYPE(PPATMGCSTATE) pGCStateGC;
374
375	/** PATM stack page for call instruction execution. (2 parts: one for our private stack and one to store the original return address */
376	GCPTRTYPE(RTGCPTR *) pGCStackGC;
377	HCPTRTYPE(RTGCPTR *) pGCStackHC;
378
379	/** GC pointer to CPUMCTX structure. */
380	GCPTRTYPE(PCPUMCTX) pCPUMCtxGC;
381
382	/* GC statistics pointers */
383	GCPTRTYPE(PSTAMRATIOU32) pStatsGC;
384	HCPTRTYPE(PSTAMRATIOU32) pStatsHC;
385
386	/* Current free index value (uPatchRun/uPatchTrap arrays). */
387	uint32_t uCurrentPatchIdx;
388
389	/* Temporary counter for patch installation call depth. (in order not to go on forever) */
390	uint32_t ulCallDepth;
391
392	/** Number of page lookup records. */
393	uint32_t cPageRecords;
394
395	/**
396	* Lowest and highest patched GC instruction addresses. To optimize searches.
397	*/
398	RTGCPTR pPatchedInstrGCLowest;
399	RTGCPTR pPatchedInstrGCHighest;
400
401	/** Pointer to the patch tree for instructions replaced by 'int 3'. */
402	GCPTRTYPE(PPATMTREES) PatchLookupTreeGC;
403	HCPTRTYPE(PPATMTREES) PatchLookupTreeHC;
404
405	/** Global PATM lookup and call function (used by call patches). */
406	RTGCPTR pfnHelperCallGC;
407	/** Global PATM return function (used by ret patches). */
408	RTGCPTR pfnHelperRetGC;
409	/** Global PATM jump function (used by indirect jmp patches). */
410	RTGCPTR pfnHelperJumpGC;
411	/** Global PATM return function (used by iret patches). */
412	RTGCPTR pfnHelperIretGC;
413
414	/** Fake patch record for global functions. */
415	HCPTRTYPE(PPATMPATCHREC) pGlobalPatchRec;
416
417	/** Pointer to original sysenter handler */
418	RTGCPTR pfnSysEnterGC;
419	/** Pointer to sysenter handler trampoline */
420	RTGCPTR pfnSysEnterPatchGC;
421	/** Sysenter patch index (for stats only) */
422	uint32_t uSysEnterPatchIdx;
423
424	// GC address of fault in monitored page (set by PATMGCMonitorPage, used by PATMR3HandleMonitoredPage)
425	RTGCPTR pvFaultMonitor;
426
427	/* Temporary information for pending MMIO patch. Set in GC or R0 context. */
428	struct
429	{
430	RTGCPHYS GCPhys;
431	RTGCPTR pCachedData;
432	} mmio;
433
434	/* Temporary storage during load/save state */
435	struct
436	{
437	HCPTRTYPE(PSSMHANDLE) pSSM;
438	uint32_t cPatches;
439	#if HC_ARCH_BITS == 64
440	uint32_t Alignment0; /*< Align the structure size on a 8-byte boundrary. /
441	#endif
442	} savedstate;
443
444	STAMCOUNTER StatNrOpcodeRead;
445	STAMCOUNTER StatDisabled;
446	STAMCOUNTER StatUnusable;
447	STAMCOUNTER StatEnabled;
448	STAMCOUNTER StatInstalled;
449	STAMCOUNTER StatInstalledFunctionPatches;
450	STAMCOUNTER StatInstalledTrampoline;
451	STAMCOUNTER StatInstalledJump;
452	STAMCOUNTER StatInt3Callable;
453	STAMCOUNTER StatInt3BlockRun;
454	STAMCOUNTER StatOverwritten;
455	STAMCOUNTER StatFixedConflicts;
456	STAMCOUNTER StatFlushed;
457	STAMCOUNTER StatPageBoundaryCrossed;
458	STAMCOUNTER StatMonitored;
459	STAMPROFILEADV StatHandleTrap;
460	STAMCOUNTER StatSwitchBack;
461	STAMCOUNTER StatSwitchBackFail;
462	STAMCOUNTER StatPATMMemoryUsed;
463	STAMCOUNTER StatDuplicateREQSuccess;
464	STAMCOUNTER StatDuplicateREQFailed;
465	STAMCOUNTER StatDuplicateUseExisting;
466	STAMCOUNTER StatFunctionFound;
467	STAMCOUNTER StatFunctionNotFound;
468	STAMPROFILEADV StatPatchWrite;
469	STAMPROFILEADV StatPatchWriteDetect;
470	STAMCOUNTER StatDirty;
471	STAMCOUNTER StatPushTrap;
472	STAMCOUNTER StatPatchWriteInterpreted;
473	STAMCOUNTER StatPatchWriteInterpretedFailed;
474
475	STAMCOUNTER StatSysEnter;
476	STAMCOUNTER StatSysExit;
477
478	STAMCOUNTER StatInstrDirty;
479	STAMCOUNTER StatInstrDirtyGood;
480	STAMCOUNTER StatInstrDirtyBad;
481
482	STAMCOUNTER StatPatchPageInserted;
483	STAMCOUNTER StatPatchPageRemoved;
484
485	STAMCOUNTER StatGenRet;
486	STAMCOUNTER StatGenRetReused;
487	STAMCOUNTER StatGenJump;
488	STAMCOUNTER StatGenCall;
489	STAMCOUNTER StatGenPopf;
490
491	STAMCOUNTER StatCheckPendingIRQ;
492
493	STAMCOUNTER StatFunctionLookupReplace;
494	STAMCOUNTER StatFunctionLookupInsert;
495	uint32_t StatU32FunctionMaxSlotsUsed;
496	uint32_t Alignment0; /*< Align the structure size on a 8-byte boundrary. /
497	} PATM, *PPATM;
498
499
500	/**
501	* Execute state save operation.
502	*
503	* @returns VBox status code.
504	* @param pVM VM Handle.
505	* @param pSSM SSM operation handle.
506	*/
507	DECLCALLBACK(int) patmr3Save(PVM pVM, PSSMHANDLE pSSM);
508
509
510	/**
511	* Execute state load operation.
512	*
513	* @returns VBox status code.
514	* @param pVM VM Handle.
515	* @param pSSM SSM operation handle.
516	* @param u32Version Data layout version.
517	*/
518	DECLCALLBACK(int) patmr3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t u32Version);
519
520	#ifdef IN_RING3
521	RTGCPTR patmPatchGCPtr2GuestGCPtr(PVM pVM, PPATCHINFO pPatch, GCPTRTYPE(uint8_t *) pPatchGC);
522	RTGCPTR patmGuestGCPtrToPatchGCPtr(PVM pVM, PPATCHINFO pPatch, GCPTRTYPE(uint8_t*)pInstrGC);
523	#endif
524
525	/* Add a patch to guest lookup record
526	*
527	* @param pVM The VM to operate on.
528	* @param pPatch Patch structure ptr
529	* @param pPatchInstrHC Guest context pointer to patch block
530	* @param pInstrGC Guest context pointer to privileged instruction
531	* @param enmType Lookup type
532	* @param fDirty Dirty flag
533	*
534	*/
535	void patmr3AddP2GLookupRecord(PVM pVM, PPATCHINFO pPatch, uint8_t *pPatchInstrHC, RTGCPTR pInstrGC, PATM_LOOKUP_TYPE enmType, bool fDirty=false);
536
537	/**
538	* Insert page records for all guest pages that contain instructions that were recompiled for this patch
539	*
540	* @returns VBox status code.
541	* @param pVM The VM to operate on.
542	* @param pPatch Patch record
543	*/
544	int patmInsertPatchPages(PVM pVM, PPATCHINFO pPatch);
545
546	/**
547	* Remove page records for all guest pages that contain instructions that were recompiled for this patch
548	*
549	* @returns VBox status code.
550	* @param pVM The VM to operate on.
551	* @param pPatch Patch record
552	*/
553	int patmRemovePatchPages(PVM pVM, PPATCHINFO pPatch);
554
555	/**
556	* Returns the GC address of the corresponding patch statistics counter
557	*
558	* @returns Stat address
559	* @param pVM The VM to operate on.
560	* @param pPatch Patch structure
561	*/
562	RTGCPTR patmPatchQueryStatAddress(PVM pVM, PPATCHINFO pPatch);
563
564	/**
565	* Remove patch for privileged instruction at specified location
566	*
567	* @returns VBox status code.
568	* @param pVM The VM to operate on.
569	* @param pPatchRec Patch record
570	* @param fForceRemove Remove all patches
571	*/
572	int PATMRemovePatch(PVM pVM, PPATMPATCHREC pPatchRec, bool fForceRemove);
573
574	/**
575	* Call for analysing the instructions following the privileged instr. for compliance with our heuristics
576	*
577	* @returns VBox status code.
578	* @param pVM The VM to operate on.
579	* @param pCpu CPU disassembly state
580	* @param pInstrHC Guest context pointer to privileged instruction
581	* @param pCurInstrHC Guest context pointer to current instruction
582	* @param pUserData User pointer
583	*
584	*/
585	typedef int (VBOXCALL PFN_PATMR3ANALYSE)(PVM pVM, DISCPUSTATE pCpu, GCPTRTYPE(uint8_t ) pInstrGC, GCPTRTYPE(uint8_t ) pCurInstrGC, void *pUserData);
586
587	/**
588	* Install guest OS specific patch
589	*
590	* @returns VBox status code.
591	* @param pVM The VM to operate on
592	* @param pCpu Disassembly state of instruction.
593	* @param pInstrGC GC Instruction pointer for instruction
594	* @param pInstrHC GC Instruction pointer for instruction
595	* @param pPatchRec Patch structure
596	*
597	*/
598	int PATMInstallGuestSpecificPatch(PVM pVM, PDISCPUSTATE pCpu, RTGCPTR pInstrGC, uint8_t *pInstrHC, PPATMPATCHREC pPatchRec);
599
600	/**
601	* Convert guest context address to host context pointer
602	*
603	* @returns VBox status code.
604	* @param pVM The VM to operate on.
605	* @param pPatch Patch block structure pointer
606	* @param pGCPtr Guest context pointer
607	*
608	* @returns Host context pointer or NULL in case of an error
609	*
610	*/
611	HCPTRTYPE(uint8_t ) PATMGCVirtToHCVirt(PVM pVM, PPATCHINFO pPatch, GCPTRTYPE(uint8_t )pGCPtr);
612
613
614	/**
615	* Check if the instruction is patched as a duplicated function
616	*
617	* @returns patch record
618	* @param pVM The VM to operate on.
619	* @param pInstrGC Guest context point to the instruction
620	*
621	*/
622	PATMDECL(PPATMPATCHREC) PATMQueryFunctionPatch(PVM pVM, RTGCPTR pInstrGC);
623
624
625	/**
626	* Empty the specified tree (PV tree, MMR3 heap)
627	*
628	* @param pVM The VM to operate on.
629	* @param ppTree Tree to empty
630	*/
631	void patmEmptyTree(PVM pVM, PPAVLPVNODECORE ppTree);
632
633
634	/**
635	* Empty the specified tree (U32 tree, MMR3 heap)
636	*
637	* @param pVM The VM to operate on.
638	* @param ppTree Tree to empty
639	*/
640	void patmEmptyTreeU32(PVM pVM, PPAVLU32NODECORE ppTree);
641
642
643	/**
644	* Return the name of the patched instruction
645	*
646	* @returns instruction name
647	*
648	* @param opcode DIS instruction opcode
649	* @param fPatchFlags Patch flags
650	*/
651	PATMDECL(char *)patmGetInstructionString(uint32_t opcode, uint32_t fPatchFlags);
652
653
654	/**
655	* Read callback for disassembly function; supports reading bytes that cross a page boundary
656	*
657	* @returns VBox status code.
658	* @param pSrc GC source pointer
659	* @param pDest HC destination pointer
660	* @param size Number of bytes to read
661	* @param dwUserdata Callback specific user data (pCpu)
662	*
663	*/
664	int32_t patmReadBytes(RTHCUINTPTR pSrc, uint8_t *pDest, uint32_t size, RTHCUINTPTR dwUserdata);
665
666
667	#ifndef IN_GC
668
669	#define PATMREAD_RAWCODE 1 /* read code as-is */
670	#define PATMREAD_ORGCODE 2 /* read original guest opcode bytes; not the patched bytes */
671
672	/*
673	* Private structure used during disassembly
674	*/
675	typedef struct
676	{
677	PVM pVM;
678	PPATCHINFO pPatchInfo;
679	HCPTRTYPE(uint8_t *) pInstrHC;
680	RTGCPTR pInstrGC;
681	uint32_t fReadFlags;
682	} PATMDISASM, *PPATMDISASM;
683
684	inline bool PATMR3DISInstr(PVM pVM, PPATCHINFO pPatch, DISCPUSTATE *pCpu, RTGCPTR InstrGC,
685	uint8_t InstrHC, uint32_t pOpsize, char *pszOutput,
686	uint32_t fReadFlags = PATMREAD_ORGCODE)
687	{
688	PATMDISASM disinfo;
689	disinfo.pVM = pVM;
690	disinfo.pPatchInfo = pPatch;
691	disinfo.pInstrHC = InstrHC;
692	disinfo.pInstrGC = InstrGC;
693	disinfo.fReadFlags = fReadFlags;
694	(pCpu)->pfnReadBytes = patmReadBytes;
695	(pCpu)->dwUserData[0] = (RTHCUINTPTR)&disinfo;
696	return DISInstr(pCpu, InstrGC, 0, pOpsize, pszOutput);
697	}
698	#endif /* !IN_GC */
699
700	__BEGIN_DECLS
701	/**
702	* #PF Virtual Handler callback for Guest access a page monitored by PATM
703	*
704	* @returns VBox status code (appropritate for trap handling and GC return).
705	* @param pVM VM Handle.
706	* @param uErrorCode CPU Error code.
707	* @param pRegFrame Trap register frame.
708	* @param pvFault The fault address (cr2).
709	* @param pvRange The base address of the handled virtual range.
710	* @param offRange The offset of the access into this range.
711	* (If it's a EIP range this's the EIP, if not it's pvFault.)
712	*/
713	PATMGCDECL(int) PATMGCMonitorPage(PVM pVM, RTGCUINT uErrorCode, PCPUMCTXCORE pRegFrame, void pvFault, void pvRange, uintptr_t offRange);
714
715	/**
716	* Find patch for privileged instruction at specified location
717	*
718	* @returns Patch structure pointer if found; else NULL
719	* @param pVM The VM to operate on.
720	* @param pInstr Guest context point to instruction that might lie within 5 bytes of an existing patch jump
721	* @param fIncludeHints Include hinted patches or not
722	*
723	*/
724	PPATCHINFO PATMFindActivePatchByEntrypoint(PVM pVM, RTGCPTR pInstrGC, bool fIncludeHints=false);
725
726	/**
727	* Patch cli/sti pushf/popf instruction block at specified location
728	*
729	* @returns VBox status code.
730	* @param pVM The VM to operate on.
731	* @param pInstrGC Guest context point to privileged instruction
732	* @param pInstrHC Host context point to privileged instruction
733	* @param uOpcode Instruction opcodee
734	* @param uOpSize Size of starting instruction
735	* @param pPatchRec Patch record
736	*
737	* @note returns failure if patching is not allowed or possible
738	*
739	*/
740	PATMR3DECL(int) PATMR3PatchBlock(PVM pVM, RTGCPTR pInstrGC, HCPTRTYPE(uint8_t *) pInstrHC,
741	uint32_t uOpcode, uint32_t uOpSize, PPATMPATCHREC pPatchRec);
742
743
744	/**
745	* Replace an instruction with a breakpoint (0xCC), that is handled dynamically in the guest context.
746	*
747	* @returns VBox status code.
748	* @param pVM The VM to operate on.
749	* @param pInstrGC Guest context point to privileged instruction
750	* @param pInstrHC Host context point to privileged instruction
751	* @param pCpu Disassembly CPU structure ptr
752	* @param pPatch Patch record
753	*
754	* @note returns failure if patching is not allowed or possible
755	*
756	*/
757	PATMR3DECL(int) PATMR3PatchInstrInt3(PVM pVM, RTGCPTR pInstrGC, HCPTRTYPE(uint8_t ) pInstrHC, DISCPUSTATE pCpu, PPATCHINFO pPatch);
758
759	/**
760	* Mark patch as dirty
761	*
762	* @returns VBox status code.
763	* @param pVM The VM to operate on.
764	* @param pPatch Patch record
765	*
766	* @note returns failure if patching is not allowed or possible
767	*
768	*/
769	PATMR3DECL(int) PATMR3MarkDirtyPatch(PVM pVM, PPATCHINFO pPatch);
770
771	/**
772	* Calculate the branch destination
773	*
774	* @returns branch destination or 0 if failed
775	* @param pCpu Disassembly state of instruction.
776	* @param pBranchInstrGC GC pointer of branch instruction
777	*/
778	inline RTGCPTR PATMResolveBranch(PDISCPUSTATE pCpu, RTGCPTR pBranchInstrGC)
779	{
780	uint32_t disp;
781	if (pCpu->param1.flags & USE_IMMEDIATE8_REL)
782	{
783	disp = (int32_t)(char)pCpu->param1.parval;
784	}
785	else
786	if (pCpu->param1.flags & USE_IMMEDIATE16_REL)
787	{
788	disp = (int32_t)(uint16_t)pCpu->param1.parval;
789	}
790	else
791	if (pCpu->param1.flags & USE_IMMEDIATE32_REL)
792	{
793	disp = (int32_t)pCpu->param1.parval;
794	}
795	else
796	{
797	Log(("We don't support far jumps here!! (%08X)\n", pCpu->param1.flags));
798	return 0;
799	}
800	#ifdef IN_GC
801	return (RTGCPTR)((uint8_t *)pBranchInstrGC + pCpu->opsize + disp);
802	#else
803	return pBranchInstrGC + pCpu->opsize + disp;
804	#endif
805	}
806
807	__END_DECLS
808
809	#ifdef DEBUG
810	int patmr3DisasmCallback(PVM pVM, DISCPUSTATE pCpu, GCPTRTYPE(uint8_t ) pInstrGC, GCPTRTYPE(uint8_t ) pCurInstrGC, void pUserData);
811	int patmr3DisasmCodeStream(PVM pVM, GCPTRTYPE(uint8_t ) pInstrGC, GCPTRTYPE(uint8_t ) pCurInstrGC, PFN_PATMR3ANALYSE pfnPATMR3Analyse, void *pUserData);
812	#endif
813
814	#endif

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source: vbox/trunk/src/VBox/VMM/PATM/PATMInternal.h@ 850

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