DBGFMem.cpp@ 96335

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1	/* $Id: DBGFMem.cpp 93115 2022-01-01 11:31:46Z vboxsync $ */
2	/** @file
3	* DBGF - Debugger Facility, Memory Methods.
4	*/
5
6	/*
7	* Copyright (C) 2007-2022 Oracle Corporation
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 (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18
19	/*********************************************************************************************************************************
20	* Header Files *
21	*********************************************************************************************************************************/
22	#define LOG_GROUP LOG_GROUP_DBGF
23	#include <VBox/vmm/dbgf.h>
24	#include <VBox/vmm/pgm.h>
25	#include <VBox/vmm/selm.h>
26	#include <VBox/vmm/hm.h>
27	#include "DBGFInternal.h"
28	#include <VBox/vmm/vm.h>
29	#include <VBox/vmm/uvm.h>
30	#include <VBox/err.h>
31	#include <VBox/log.h>
32	#include <VBox/vmm/mm.h>
33
34
35
36	/**
37	* Scan guest memory for an exact byte string.
38	*
39	* @returns VBox status code.
40	* @param pUVM The user mode VM handle.
41	* @param idCpu The ID of the CPU context to search in.
42	* @param pAddress Where to store the mixed address.
43	* @param puAlign The alignment restriction imposed on the search result.
44	* @param pcbRange The number of bytes to scan. Passed as a pointer because
45	* it may be 64-bit.
46	* @param pabNeedle What to search for - exact search.
47	* @param cbNeedle Size of the search byte string.
48	* @param pHitAddress Where to put the address of the first hit.
49	*/
50	static DECLCALLBACK(int) dbgfR3MemScan(PUVM pUVM, VMCPUID idCpu, PCDBGFADDRESS pAddress, PCRTGCUINTPTR pcbRange,
51	RTGCUINTPTR puAlign, const uint8_t pabNeedle, size_t cbNeedle, PDBGFADDRESS pHitAddress)
52	{
53	PVM pVM = pUVM->pVM;
54	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
55	Assert(idCpu == VMMGetCpuId(pVM));
56
57	/*
58	* Validate the input we use, PGM does the rest.
59	*/
60	RTGCUINTPTR cbRange = *pcbRange;
61	if (!DBGFR3AddrIsValid(pUVM, pAddress))
62	return VERR_INVALID_POINTER;
63	if (!RT_VALID_PTR(pHitAddress))
64	return VERR_INVALID_POINTER;
65
66	/*
67	* Select DBGF worker by addressing mode.
68	*/
69	int rc;
70	PVMCPU pVCpu = VMMGetCpuById(pVM, idCpu);
71	PGMMODE enmMode = PGMGetGuestMode(pVCpu);
72	if ( enmMode == PGMMODE_REAL
73	\|\| enmMode == PGMMODE_PROTECTED
74	\|\| DBGFADDRESS_IS_PHYS(pAddress)
75	)
76	{
77	RTGCPHYS GCPhysAlign = *puAlign;
78	if (GCPhysAlign != *puAlign)
79	return VERR_OUT_OF_RANGE;
80	RTGCPHYS PhysHit;
81	rc = PGMR3DbgScanPhysical(pVM, pAddress->FlatPtr, cbRange, GCPhysAlign, pabNeedle, cbNeedle, &PhysHit);
82	if (RT_SUCCESS(rc))
83	DBGFR3AddrFromPhys(pUVM, pHitAddress, PhysHit);
84	}
85	else
86	{
87	#if GC_ARCH_BITS > 32
88	if ( ( pAddress->FlatPtr >= _4G
89	\|\| pAddress->FlatPtr + cbRange > _4G)
90	&& enmMode != PGMMODE_AMD64
91	&& enmMode != PGMMODE_AMD64_NX)
92	return VERR_DBGF_MEM_NOT_FOUND;
93	#endif
94	RTGCUINTPTR GCPtrHit;
95	rc = PGMR3DbgScanVirtual(pVM, pVCpu, pAddress->FlatPtr, cbRange, *puAlign, pabNeedle, cbNeedle, &GCPtrHit);
96	if (RT_SUCCESS(rc))
97	DBGFR3AddrFromFlat(pUVM, pHitAddress, GCPtrHit);
98	}
99
100	return rc;
101	}
102
103
104	/**
105	* Scan guest memory for an exact byte string.
106	*
107	* @returns VBox status codes:
108	* @retval VINF_SUCCESS and *pGCPtrHit on success.
109	* @retval VERR_DBGF_MEM_NOT_FOUND if not found.
110	* @retval VERR_INVALID_POINTER if any of the pointer arguments are invalid.
111	* @retval VERR_INVALID_ARGUMENT if any other arguments are invalid.
112	*
113	* @param pUVM The user mode VM handle.
114	* @param idCpu The ID of the CPU context to search in.
115	* @param pAddress Where to store the mixed address.
116	* @param cbRange The number of bytes to scan.
117	* @param uAlign The alignment restriction imposed on the result.
118	* Usually set to 1.
119	* @param pvNeedle What to search for - exact search.
120	* @param cbNeedle Size of the search byte string.
121	* @param pHitAddress Where to put the address of the first hit.
122	*
123	* @thread Any thread.
124	*/
125	VMMR3DECL(int) DBGFR3MemScan(PUVM pUVM, VMCPUID idCpu, PCDBGFADDRESS pAddress, RTGCUINTPTR cbRange, RTGCUINTPTR uAlign,
126	const void *pvNeedle, size_t cbNeedle, PDBGFADDRESS pHitAddress)
127	{
128	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
129	AssertReturn(idCpu < pUVM->cCpus, VERR_INVALID_CPU_ID);
130	return VMR3ReqPriorityCallWaitU(pUVM, idCpu, (PFNRT)dbgfR3MemScan, 8,
131	pUVM, idCpu, pAddress, &cbRange, &uAlign, pvNeedle, cbNeedle, pHitAddress);
132
133	}
134
135
136	/**
137	* Read guest memory.
138	*
139	* @returns VBox status code.
140	* @param pUVM The user mode VM handle.
141	* @param idCpu The ID of the CPU context to read memory from.
142	* @param pAddress Where to start reading.
143	* @param pvBuf Where to store the data we've read.
144	* @param cbRead The number of bytes to read.
145	*/
146	static DECLCALLBACK(int) dbgfR3MemRead(PUVM pUVM, VMCPUID idCpu, PCDBGFADDRESS pAddress, void *pvBuf, size_t cbRead)
147	{
148	PVM pVM = pUVM->pVM;
149	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
150	Assert(idCpu == VMMGetCpuId(pVM));
151
152	/*
153	* Validate the input we use, PGM does the rest.
154	*/
155	if (!DBGFR3AddrIsValid(pUVM, pAddress))
156	return VERR_INVALID_POINTER;
157	if (!RT_VALID_PTR(pvBuf))
158	return VERR_INVALID_POINTER;
159
160	/*
161	* Select PGM worker by addressing mode.
162	*/
163	int rc;
164	PVMCPU pVCpu = VMMGetCpuById(pVM, idCpu);
165	PGMMODE enmMode = PGMGetGuestMode(pVCpu);
166	if ( enmMode == PGMMODE_REAL
167	\|\| enmMode == PGMMODE_PROTECTED
168	\|\| DBGFADDRESS_IS_PHYS(pAddress) )
169	rc = PGMPhysSimpleReadGCPhys(pVM, pvBuf, pAddress->FlatPtr, cbRead);
170	else
171	{
172	#if GC_ARCH_BITS > 32
173	if ( ( pAddress->FlatPtr >= _4G
174	\|\| pAddress->FlatPtr + cbRead > _4G)
175	&& enmMode != PGMMODE_AMD64
176	&& enmMode != PGMMODE_AMD64_NX)
177	return VERR_PAGE_TABLE_NOT_PRESENT;
178	#endif
179	rc = PGMPhysSimpleReadGCPtr(pVCpu, pvBuf, pAddress->FlatPtr, cbRead);
180	}
181	return rc;
182	}
183
184
185	/**
186	* Read guest memory.
187	*
188	* @returns VBox status code.
189	*
190	* @param pUVM The user mode VM handle.
191	* @param idCpu The ID of the source CPU context (for the address).
192	* @param pAddress Where to start reading.
193	* @param pvBuf Where to store the data we've read.
194	* @param cbRead The number of bytes to read.
195	*/
196	VMMR3DECL(int) DBGFR3MemRead(PUVM pUVM, VMCPUID idCpu, PCDBGFADDRESS pAddress, void *pvBuf, size_t cbRead)
197	{
198	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
199	AssertReturn(idCpu < pUVM->cCpus, VERR_INVALID_CPU_ID);
200
201	if ((pAddress->fFlags & DBGFADDRESS_FLAGS_TYPE_MASK) == DBGFADDRESS_FLAGS_RING0)
202	{
203	AssertCompile(sizeof(RTHCUINTPTR) <= sizeof(pAddress->FlatPtr));
204	VM_ASSERT_VALID_EXT_RETURN(pUVM->pVM, VERR_INVALID_VM_HANDLE);
205	return VMMR3ReadR0Stack(pUVM->pVM, idCpu, (RTHCUINTPTR)pAddress->FlatPtr, pvBuf, cbRead);
206	}
207	return VMR3ReqPriorityCallWaitU(pUVM, idCpu, (PFNRT)dbgfR3MemRead, 5, pUVM, idCpu, pAddress, pvBuf, cbRead);
208	}
209
210
211	/**
212	* Read a zero terminated string from guest memory.
213	*
214	* @returns VBox status code.
215	*
216	* @param pUVM The user mode VM handle.
217	* @param idCpu The ID of the source CPU context (for the address).
218	* @param pAddress Where to start reading.
219	* @param pszBuf Where to store the string.
220	* @param cchBuf The size of the buffer.
221	*/
222	static DECLCALLBACK(int) dbgfR3MemReadString(PUVM pUVM, VMCPUID idCpu, PCDBGFADDRESS pAddress, char *pszBuf, size_t cchBuf)
223	{
224	/*
225	* Validate the input we use, PGM does the rest.
226	*/
227	if (!DBGFR3AddrIsValid(pUVM, pAddress))
228	return VERR_INVALID_POINTER;
229	if (!RT_VALID_PTR(pszBuf))
230	return VERR_INVALID_POINTER;
231
232	/*
233	* Let dbgfR3MemRead do the job.
234	*/
235	int rc = dbgfR3MemRead(pUVM, idCpu, pAddress, pszBuf, cchBuf);
236
237	/*
238	* Make sure the result is terminated and that overflow is signaled.
239	* This may look a bit reckless with the rc but, it should be fine.
240	*/
241	if (!RTStrEnd(pszBuf, cchBuf))
242	{
243	pszBuf[cchBuf - 1] = '\0';
244	rc = VINF_BUFFER_OVERFLOW;
245	}
246	/*
247	* Handle partial reads (not perfect).
248	*/
249	else if (RT_FAILURE(rc))
250	{
251	if (pszBuf[0])
252	rc = VINF_SUCCESS;
253	}
254
255	return rc;
256	}
257
258
259	/**
260	* Read a zero terminated string from guest memory.
261	*
262	* @returns VBox status code.
263	*
264	* @param pUVM The user mode VM handle.
265	* @param idCpu The ID of the source CPU context (for the address).
266	* @param pAddress Where to start reading.
267	* @param pszBuf Where to store the string.
268	* @param cchBuf The size of the buffer.
269	*/
270	VMMR3DECL(int) DBGFR3MemReadString(PUVM pUVM, VMCPUID idCpu, PCDBGFADDRESS pAddress, char *pszBuf, size_t cchBuf)
271	{
272	/*
273	* Validate and zero output.
274	*/
275	if (!RT_VALID_PTR(pszBuf))
276	return VERR_INVALID_POINTER;
277	if (cchBuf <= 0)
278	return VERR_INVALID_PARAMETER;
279	memset(pszBuf, 0, cchBuf);
280	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
281	AssertReturn(idCpu < pUVM->cCpus, VERR_INVALID_CPU_ID);
282
283	/*
284	* Pass it on to the EMT.
285	*/
286	return VMR3ReqPriorityCallWaitU(pUVM, idCpu, (PFNRT)dbgfR3MemReadString, 5, pUVM, idCpu, pAddress, pszBuf, cchBuf);
287	}
288
289
290	/**
291	* Writes guest memory.
292	*
293	* @returns VBox status code.
294	*
295	* @param pUVM The user mode VM handle.
296	* @param idCpu The ID of the target CPU context (for the address).
297	* @param pAddress Where to start writing.
298	* @param pvBuf The data to write.
299	* @param cbWrite The number of bytes to write.
300	*/
301	static DECLCALLBACK(int) dbgfR3MemWrite(PUVM pUVM, VMCPUID idCpu, PCDBGFADDRESS pAddress, void const *pvBuf, size_t cbWrite)
302	{
303	/*
304	* Validate the input we use, PGM does the rest.
305	*/
306	if (!DBGFR3AddrIsValid(pUVM, pAddress))
307	return VERR_INVALID_POINTER;
308	if (!RT_VALID_PTR(pvBuf))
309	return VERR_INVALID_POINTER;
310	PVM pVM = pUVM->pVM;
311	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
312
313	/*
314	* Select PGM function by addressing mode.
315	*/
316	int rc;
317	PVMCPU pVCpu = VMMGetCpuById(pVM, idCpu);
318	PGMMODE enmMode = PGMGetGuestMode(pVCpu);
319	if ( enmMode == PGMMODE_REAL
320	\|\| enmMode == PGMMODE_PROTECTED
321	\|\| DBGFADDRESS_IS_PHYS(pAddress) )
322	rc = PGMPhysSimpleWriteGCPhys(pVM, pAddress->FlatPtr, pvBuf, cbWrite);
323	else
324	{
325	#if GC_ARCH_BITS > 32
326	if ( ( pAddress->FlatPtr >= _4G
327	\|\| pAddress->FlatPtr + cbWrite > _4G)
328	&& enmMode != PGMMODE_AMD64
329	&& enmMode != PGMMODE_AMD64_NX)
330	return VERR_PAGE_TABLE_NOT_PRESENT;
331	#endif
332	rc = PGMPhysSimpleWriteGCPtr(pVCpu, pAddress->FlatPtr, pvBuf, cbWrite);
333	}
334	return rc;
335	}
336
337
338	/**
339	* Read guest memory.
340	*
341	* @returns VBox status code.
342	*
343	* @param pUVM The user mode VM handle.
344	* @param idCpu The ID of the target CPU context (for the address).
345	* @param pAddress Where to start writing.
346	* @param pvBuf The data to write.
347	* @param cbWrite The number of bytes to write.
348	*/
349	VMMR3DECL(int) DBGFR3MemWrite(PUVM pUVM, VMCPUID idCpu, PCDBGFADDRESS pAddress, void const *pvBuf, size_t cbWrite)
350	{
351	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
352	AssertReturn(idCpu < pUVM->cCpus, VERR_INVALID_CPU_ID);
353	return VMR3ReqPriorityCallWaitU(pUVM, idCpu, (PFNRT)dbgfR3MemWrite, 5, pUVM, idCpu, pAddress, pvBuf, cbWrite);
354	}
355
356
357	/**
358	* Worker for DBGFR3SelQueryInfo that calls into SELM.
359	*/
360	static DECLCALLBACK(int) dbgfR3SelQueryInfo(PUVM pUVM, VMCPUID idCpu, RTSEL Sel, uint32_t fFlags, PDBGFSELINFO pSelInfo)
361	{
362	PVM pVM = pUVM->pVM;
363	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
364
365	/*
366	* Make the query.
367	*/
368	PVMCPU pVCpu = VMMGetCpuById(pVM, idCpu);
369	VMCPU_ASSERT_EMT(pVCpu);
370	int rc = SELMR3GetSelectorInfo(pVCpu, Sel, pSelInfo);
371
372	/*
373	* 64-bit mode HACKS for making data and stack selectors wide open when
374	* queried. This is voodoo magic.
375	*/
376	if (fFlags & DBGFSELQI_FLAGS_DT_ADJ_64BIT_MODE)
377	{
378	/* Expand 64-bit data and stack selectors. The check is a bit bogus... */
379	if ( RT_SUCCESS(rc)
380	&& (pSelInfo->fFlags & ( DBGFSELINFO_FLAGS_LONG_MODE \| DBGFSELINFO_FLAGS_REAL_MODE \| DBGFSELINFO_FLAGS_PROT_MODE
381	\| DBGFSELINFO_FLAGS_GATE \| DBGFSELINFO_FLAGS_HYPER
382	\| DBGFSELINFO_FLAGS_INVALID \| DBGFSELINFO_FLAGS_NOT_PRESENT))
383	== DBGFSELINFO_FLAGS_LONG_MODE
384	&& pSelInfo->cbLimit != ~(RTGCPTR)0
385	&& CPUMIsGuestIn64BitCode(pVCpu) )
386	{
387	pSelInfo->GCPtrBase = 0;
388	pSelInfo->cbLimit = ~(RTGCPTR)0;
389	}
390	else if ( Sel == 0
391	&& CPUMIsGuestIn64BitCode(pVCpu))
392	{
393	pSelInfo->GCPtrBase = 0;
394	pSelInfo->cbLimit = ~(RTGCPTR)0;
395	pSelInfo->Sel = 0;
396	pSelInfo->SelGate = 0;
397	pSelInfo->fFlags = DBGFSELINFO_FLAGS_LONG_MODE;
398	pSelInfo->u.Raw64.Gen.u1Present = 1;
399	pSelInfo->u.Raw64.Gen.u1Long = 1;
400	pSelInfo->u.Raw64.Gen.u1DescType = 1;
401	rc = VINF_SUCCESS;
402	}
403	}
404	return rc;
405	}
406
407
408	/**
409	* Gets information about a selector.
410	*
411	* Intended for the debugger mostly and will prefer the guest
412	* descriptor tables over the shadow ones.
413	*
414	* @returns VBox status code, the following are the common ones.
415	* @retval VINF_SUCCESS on success.
416	* @retval VERR_INVALID_SELECTOR if the selector isn't fully inside the
417	* descriptor table.
418	* @retval VERR_SELECTOR_NOT_PRESENT if the LDT is invalid or not present. This
419	* is not returned if the selector itself isn't present, you have to
420	* check that for yourself (see DBGFSELINFO::fFlags).
421	* @retval VERR_PAGE_TABLE_NOT_PRESENT or VERR_PAGE_NOT_PRESENT if the
422	* pagetable or page backing the selector table wasn't present.
423	*
424	* @param pUVM The user mode VM handle.
425	* @param idCpu The ID of the virtual CPU context.
426	* @param Sel The selector to get info about.
427	* @param fFlags Flags, see DBGFQSEL_FLAGS_*.
428	* @param pSelInfo Where to store the information. This will always be
429	* updated.
430	*
431	* @remarks This is a wrapper around SELMR3GetSelectorInfo and
432	* SELMR3GetShadowSelectorInfo.
433	*/
434	VMMR3DECL(int) DBGFR3SelQueryInfo(PUVM pUVM, VMCPUID idCpu, RTSEL Sel, uint32_t fFlags, PDBGFSELINFO pSelInfo)
435	{
436	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
437	AssertReturn(idCpu < pUVM->cCpus, VERR_INVALID_CPU_ID);
438	AssertReturn(!(fFlags & ~(DBGFSELQI_FLAGS_DT_GUEST \| DBGFSELQI_FLAGS_DT_ADJ_64BIT_MODE)), VERR_INVALID_PARAMETER);
439
440	/* Clear the return data here on this thread. */
441	memset(pSelInfo, 0, sizeof(*pSelInfo));
442
443	/*
444	* Dispatch the request to a worker running on the target CPU.
445	*/
446	return VMR3ReqPriorityCallWaitU(pUVM, idCpu, (PFNRT)dbgfR3SelQueryInfo, 5, pUVM, idCpu, Sel, fFlags, pSelInfo);
447	}
448
449
450	/**
451	* Validates a CS selector.
452	*
453	* @returns VBox status code.
454	* @param pSelInfo Pointer to the selector information for the CS selector.
455	* @param SelCPL The selector defining the CPL (SS).
456	*/
457	VMMDECL(int) DBGFR3SelInfoValidateCS(PCDBGFSELINFO pSelInfo, RTSEL SelCPL)
458	{
459	/*
460	* Check if present.
461	*/
462	if (pSelInfo->u.Raw.Gen.u1Present)
463	{
464	/*
465	* Type check.
466	*/
467	if ( pSelInfo->u.Raw.Gen.u1DescType == 1
468	&& (pSelInfo->u.Raw.Gen.u4Type & X86_SEL_TYPE_CODE))
469	{
470	/*
471	* Check level.
472	*/
473	unsigned uLevel = RT_MAX(SelCPL & X86_SEL_RPL, pSelInfo->Sel & X86_SEL_RPL);
474	if ( !(pSelInfo->u.Raw.Gen.u4Type & X86_SEL_TYPE_CONF)
475	? uLevel <= pSelInfo->u.Raw.Gen.u2Dpl
476	: uLevel >= pSelInfo->u.Raw.Gen.u2Dpl /* hope I got this right now... */
477	)
478	return VINF_SUCCESS;
479	return VERR_INVALID_RPL;
480	}
481	return VERR_NOT_CODE_SELECTOR;
482	}
483	return VERR_SELECTOR_NOT_PRESENT;
484	}
485
486
487	/**
488	* Converts a PGM paging mode to a set of DBGFPGDMP_XXX flags.
489	*
490	* @returns Flags. UINT32_MAX if the mode is invalid (asserted).
491	* @param enmMode The mode.
492	*/
493	static uint32_t dbgfR3PagingDumpModeToFlags(PGMMODE enmMode)
494	{
495	switch (enmMode)
496	{
497	case PGMMODE_32_BIT:
498	return DBGFPGDMP_FLAGS_PSE;
499	case PGMMODE_PAE:
500	return DBGFPGDMP_FLAGS_PSE \| DBGFPGDMP_FLAGS_PAE;
501	case PGMMODE_PAE_NX:
502	return DBGFPGDMP_FLAGS_PSE \| DBGFPGDMP_FLAGS_PAE \| DBGFPGDMP_FLAGS_NXE;
503	case PGMMODE_AMD64:
504	return DBGFPGDMP_FLAGS_PSE \| DBGFPGDMP_FLAGS_PAE \| DBGFPGDMP_FLAGS_LME;
505	case PGMMODE_AMD64_NX:
506	return DBGFPGDMP_FLAGS_PSE \| DBGFPGDMP_FLAGS_PAE \| DBGFPGDMP_FLAGS_LME \| DBGFPGDMP_FLAGS_NXE;
507	case PGMMODE_NESTED_32BIT:
508	return DBGFPGDMP_FLAGS_NP \| DBGFPGDMP_FLAGS_PSE;
509	case PGMMODE_NESTED_PAE:
510	return DBGFPGDMP_FLAGS_NP \| DBGFPGDMP_FLAGS_PSE \| DBGFPGDMP_FLAGS_PAE \| DBGFPGDMP_FLAGS_NXE;
511	case PGMMODE_NESTED_AMD64:
512	return DBGFPGDMP_FLAGS_NP \| DBGFPGDMP_FLAGS_PSE \| DBGFPGDMP_FLAGS_PAE \| DBGFPGDMP_FLAGS_LME \| DBGFPGDMP_FLAGS_NXE;
513	case PGMMODE_EPT:
514	return DBGFPGDMP_FLAGS_EPT;
515	case PGMMODE_NONE:
516	return 0;
517	default:
518	AssertFailedReturn(UINT32_MAX);
519	}
520	}
521
522
523	/**
524	* EMT worker for DBGFR3PagingDumpEx.
525	*
526	* @returns VBox status code.
527	* @param pUVM The shared VM handle.
528	* @param idCpu The current CPU ID.
529	* @param fFlags The flags, DBGFPGDMP_FLAGS_XXX. Valid.
530	* @param pcr3 The CR3 to use (unless we're getting the current
531	* state, see @a fFlags).
532	* @param pu64FirstAddr The first address.
533	* @param pu64LastAddr The last address.
534	* @param cMaxDepth The depth.
535	* @param pHlp The output callbacks.
536	*/
537	static DECLCALLBACK(int) dbgfR3PagingDumpEx(PUVM pUVM, VMCPUID idCpu, uint32_t fFlags, uint64_t *pcr3,
538	uint64_t pu64FirstAddr, uint64_t pu64LastAddr,
539	uint32_t cMaxDepth, PCDBGFINFOHLP pHlp)
540	{
541	/*
542	* Implement dumping both context by means of recursion.
543	*/
544	if ((fFlags & (DBGFPGDMP_FLAGS_GUEST \| DBGFPGDMP_FLAGS_SHADOW)) == (DBGFPGDMP_FLAGS_GUEST \| DBGFPGDMP_FLAGS_SHADOW))
545	{
546	int rc1 = dbgfR3PagingDumpEx(pUVM, idCpu, fFlags & ~DBGFPGDMP_FLAGS_GUEST,
547	pcr3, pu64FirstAddr, pu64LastAddr, cMaxDepth, pHlp);
548	int rc2 = dbgfR3PagingDumpEx(pUVM, idCpu, fFlags & ~DBGFPGDMP_FLAGS_SHADOW,
549	pcr3, pu64FirstAddr, pu64LastAddr, cMaxDepth, pHlp);
550	return RT_FAILURE(rc1) ? rc1 : rc2;
551	}
552
553	PVM pVM = pUVM->pVM;
554	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
555
556	/*
557	* Get the current CR3/mode if required.
558	*/
559	uint64_t cr3 = *pcr3;
560	if (fFlags & (DBGFPGDMP_FLAGS_CURRENT_CR3 \| DBGFPGDMP_FLAGS_CURRENT_MODE))
561	{
562	PVMCPU pVCpu = pVM->apCpusR3[idCpu];
563	if (fFlags & DBGFPGDMP_FLAGS_SHADOW)
564	{
565	if (PGMGetShadowMode(pVCpu) == PGMMODE_NONE)
566	{
567	pHlp->pfnPrintf(pHlp, "Shadow paging mode is 'none' (NEM)\n");
568	return VINF_SUCCESS;
569	}
570
571	if (fFlags & DBGFPGDMP_FLAGS_CURRENT_CR3)
572	cr3 = PGMGetHyperCR3(pVCpu);
573	if (fFlags & DBGFPGDMP_FLAGS_CURRENT_MODE)
574	fFlags \|= dbgfR3PagingDumpModeToFlags(PGMGetShadowMode(pVCpu));
575	}
576	else
577	{
578	if (fFlags & DBGFPGDMP_FLAGS_CURRENT_CR3)
579	cr3 = CPUMGetGuestCR3(pVCpu);
580	if (fFlags & DBGFPGDMP_FLAGS_CURRENT_MODE)
581	{
582	AssertCompile(DBGFPGDMP_FLAGS_PSE == X86_CR4_PSE); AssertCompile(DBGFPGDMP_FLAGS_PAE == X86_CR4_PAE);
583	fFlags \|= CPUMGetGuestCR4(pVCpu) & (X86_CR4_PSE \| X86_CR4_PAE);
584	AssertCompile(DBGFPGDMP_FLAGS_LME == MSR_K6_EFER_LME); AssertCompile(DBGFPGDMP_FLAGS_NXE == MSR_K6_EFER_NXE);
585	fFlags \|= CPUMGetGuestEFER(pVCpu) & (MSR_K6_EFER_LME \| MSR_K6_EFER_NXE);
586	}
587	}
588	}
589	fFlags &= ~(DBGFPGDMP_FLAGS_CURRENT_MODE \| DBGFPGDMP_FLAGS_CURRENT_CR3);
590
591	/*
592	* Call PGM to do the real work.
593	*/
594	int rc;
595	if (fFlags & DBGFPGDMP_FLAGS_SHADOW)
596	rc = PGMR3DumpHierarchyShw(pVM, cr3, fFlags, pu64FirstAddr, pu64LastAddr, cMaxDepth, pHlp);
597	else
598	rc = PGMR3DumpHierarchyGst(pVM, cr3, fFlags, pu64FirstAddr, pu64LastAddr, cMaxDepth, pHlp);
599	return rc;
600	}
601
602
603	/**
604	* Dump paging structures.
605	*
606	* This API can be used to dump both guest and shadow structures.
607	*
608	* @returns VBox status code.
609	* @param pUVM The user mode VM handle.
610	* @param idCpu The current CPU ID.
611	* @param fFlags The flags, DBGFPGDMP_FLAGS_XXX.
612	* @param cr3 The CR3 to use (unless we're getting the current
613	* state, see @a fFlags).
614	* @param u64FirstAddr The address to start dumping at.
615	* @param u64LastAddr The address to end dumping after.
616	* @param cMaxDepth The depth.
617	* @param pHlp The output callbacks. Defaults to the debug log if
618	* NULL.
619	*/
620	VMMDECL(int) DBGFR3PagingDumpEx(PUVM pUVM, VMCPUID idCpu, uint32_t fFlags, uint64_t cr3, uint64_t u64FirstAddr,
621	uint64_t u64LastAddr, uint32_t cMaxDepth, PCDBGFINFOHLP pHlp)
622	{
623	/*
624	* Input validation.
625	*/
626	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
627	AssertReturn(idCpu < pUVM->cCpus, VERR_INVALID_CPU_ID);
628	AssertReturn(!(fFlags & ~DBGFPGDMP_FLAGS_VALID_MASK), VERR_INVALID_PARAMETER);
629	AssertReturn(fFlags & (DBGFPGDMP_FLAGS_SHADOW \| DBGFPGDMP_FLAGS_GUEST), VERR_INVALID_PARAMETER);
630	AssertReturn((fFlags & DBGFPGDMP_FLAGS_CURRENT_MODE) \|\| !(fFlags & DBGFPGDMP_FLAGS_MODE_MASK), VERR_INVALID_PARAMETER);
631	AssertReturn( !(fFlags & DBGFPGDMP_FLAGS_EPT)
632	\|\| !(fFlags & (DBGFPGDMP_FLAGS_LME \| DBGFPGDMP_FLAGS_PAE \| DBGFPGDMP_FLAGS_PSE \| DBGFPGDMP_FLAGS_NXE))
633	, VERR_INVALID_PARAMETER);
634	AssertReturn(cMaxDepth, VERR_INVALID_PARAMETER);
635
636	/*
637	* Forward the request to the target CPU.
638	*/
639	return VMR3ReqPriorityCallWaitU(pUVM, idCpu, (PFNRT)dbgfR3PagingDumpEx, 8,
640	pUVM, idCpu, fFlags, &cr3, &u64FirstAddr, &u64LastAddr, cMaxDepth, pHlp ? pHlp : DBGFR3InfoLogHlp());
641	}
642

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source: vbox/trunk/src/VBox/VMM/VMMR3/DBGFMem.cpp@ 96335

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