DBGFMem.cpp@ 72064

Last change on this file since 72064 was 70948, checked in by vboxsync, 7 years ago
VMM: Added a bMainExecutionEngine member to the VM structure for use instead of fHMEnabled and fNEMEnabled. Changed a lot of HMIsEnabled invocations to use the new macros VM_IS_RAW_MODE_ENABLED and VM_IS_HM_OR_NEM_ENABLED. Eliminated fHMEnabledFixed. Fixed inverted test for raw-mode debug register sanity checking. Some other minor cleanups.
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 24.1 KB

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1	/* $Id: DBGFMem.cpp 70948 2018-02-10 15:38:12Z vboxsync $ */
2	/** @file
3	* DBGF - Debugger Facility, Memory Methods.
4	*/
5
6	/*
7	* Copyright (C) 2007-2017 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 (!VALID_PTR(pHitAddress))
64	return VERR_INVALID_POINTER;
65	if (DBGFADDRESS_IS_HMA(pAddress))
66	return VERR_INVALID_POINTER;
67
68	/*
69	* Select DBGF worker by addressing mode.
70	*/
71	int rc;
72	PVMCPU pVCpu = VMMGetCpuById(pVM, idCpu);
73	PGMMODE enmMode = PGMGetGuestMode(pVCpu);
74	if ( enmMode == PGMMODE_REAL
75	\|\| enmMode == PGMMODE_PROTECTED
76	\|\| DBGFADDRESS_IS_PHYS(pAddress)
77	)
78	{
79	RTGCPHYS GCPhysAlign = *puAlign;
80	if (GCPhysAlign != *puAlign)
81	return VERR_OUT_OF_RANGE;
82	RTGCPHYS PhysHit;
83	rc = PGMR3DbgScanPhysical(pVM, pAddress->FlatPtr, cbRange, GCPhysAlign, pabNeedle, cbNeedle, &PhysHit);
84	if (RT_SUCCESS(rc))
85	DBGFR3AddrFromPhys(pUVM, pHitAddress, PhysHit);
86	}
87	else
88	{
89	#if GC_ARCH_BITS > 32
90	if ( ( pAddress->FlatPtr >= _4G
91	\|\| pAddress->FlatPtr + cbRange > _4G)
92	&& enmMode != PGMMODE_AMD64
93	&& enmMode != PGMMODE_AMD64_NX)
94	return VERR_DBGF_MEM_NOT_FOUND;
95	#endif
96	RTGCUINTPTR GCPtrHit;
97	rc = PGMR3DbgScanVirtual(pVM, pVCpu, pAddress->FlatPtr, cbRange, *puAlign, pabNeedle, cbNeedle, &GCPtrHit);
98	if (RT_SUCCESS(rc))
99	DBGFR3AddrFromFlat(pUVM, pHitAddress, GCPtrHit);
100	}
101
102	return rc;
103	}
104
105
106	/**
107	* Scan guest memory for an exact byte string.
108	*
109	* @returns VBox status codes:
110	* @retval VINF_SUCCESS and *pGCPtrHit on success.
111	* @retval VERR_DBGF_MEM_NOT_FOUND if not found.
112	* @retval VERR_INVALID_POINTER if any of the pointer arguments are invalid.
113	* @retval VERR_INVALID_ARGUMENT if any other arguments are invalid.
114	*
115	* @param pUVM The user mode VM handle.
116	* @param idCpu The ID of the CPU context to search in.
117	* @param pAddress Where to store the mixed address.
118	* @param cbRange The number of bytes to scan.
119	* @param uAlign The alignment restriction imposed on the result.
120	* Usually set to 1.
121	* @param pvNeedle What to search for - exact search.
122	* @param cbNeedle Size of the search byte string.
123	* @param pHitAddress Where to put the address of the first hit.
124	*
125	* @thread Any thread.
126	*/
127	VMMR3DECL(int) DBGFR3MemScan(PUVM pUVM, VMCPUID idCpu, PCDBGFADDRESS pAddress, RTGCUINTPTR cbRange, RTGCUINTPTR uAlign,
128	const void *pvNeedle, size_t cbNeedle, PDBGFADDRESS pHitAddress)
129	{
130	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
131	AssertReturn(idCpu < pUVM->cCpus, VERR_INVALID_CPU_ID);
132	return VMR3ReqPriorityCallWaitU(pUVM, idCpu, (PFNRT)dbgfR3MemScan, 8,
133	pUVM, idCpu, pAddress, &cbRange, &uAlign, pvNeedle, cbNeedle, pHitAddress);
134
135	}
136
137
138	/**
139	* Read guest memory.
140	*
141	* @returns VBox status code.
142	* @param pUVM The user mode VM handle.
143	* @param idCpu The ID of the CPU context to read memory from.
144	* @param pAddress Where to start reading.
145	* @param pvBuf Where to store the data we've read.
146	* @param cbRead The number of bytes to read.
147	*/
148	static DECLCALLBACK(int) dbgfR3MemRead(PUVM pUVM, VMCPUID idCpu, PCDBGFADDRESS pAddress, void *pvBuf, size_t cbRead)
149	{
150	PVM pVM = pUVM->pVM;
151	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
152	Assert(idCpu == VMMGetCpuId(pVM));
153
154	/*
155	* Validate the input we use, PGM does the rest.
156	*/
157	if (!DBGFR3AddrIsValid(pUVM, pAddress))
158	return VERR_INVALID_POINTER;
159	if (!VALID_PTR(pvBuf))
160	return VERR_INVALID_POINTER;
161
162	/*
163	* HMA is special.
164	*/
165	int rc;
166	if (DBGFADDRESS_IS_HMA(pAddress))
167	{
168	if (DBGFADDRESS_IS_PHYS(pAddress))
169	rc = VERR_INVALID_POINTER;
170	else
171	rc = MMR3HyperReadGCVirt(pVM, pvBuf, pAddress->FlatPtr, cbRead);
172	}
173	else
174	{
175	/*
176	* Select PGM worker by addressing mode.
177	*/
178	PVMCPU pVCpu = VMMGetCpuById(pVM, idCpu);
179	PGMMODE enmMode = PGMGetGuestMode(pVCpu);
180	if ( enmMode == PGMMODE_REAL
181	\|\| enmMode == PGMMODE_PROTECTED
182	\|\| DBGFADDRESS_IS_PHYS(pAddress) )
183	rc = PGMPhysSimpleReadGCPhys(pVM, pvBuf, pAddress->FlatPtr, cbRead);
184	else
185	{
186	#if GC_ARCH_BITS > 32
187	if ( ( pAddress->FlatPtr >= _4G
188	\|\| pAddress->FlatPtr + cbRead > _4G)
189	&& enmMode != PGMMODE_AMD64
190	&& enmMode != PGMMODE_AMD64_NX)
191	return VERR_PAGE_TABLE_NOT_PRESENT;
192	#endif
193	rc = PGMPhysSimpleReadGCPtr(pVCpu, pvBuf, pAddress->FlatPtr, cbRead);
194	}
195	}
196	return rc;
197	}
198
199
200	/**
201	* Read guest memory.
202	*
203	* @returns VBox status code.
204	*
205	* @param pUVM The user mode VM handle.
206	* @param idCpu The ID of the source CPU context (for the address).
207	* @param pAddress Where to start reading.
208	* @param pvBuf Where to store the data we've read.
209	* @param cbRead The number of bytes to read.
210	*/
211	VMMR3DECL(int) DBGFR3MemRead(PUVM pUVM, VMCPUID idCpu, PCDBGFADDRESS pAddress, void *pvBuf, size_t cbRead)
212	{
213	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
214	AssertReturn(idCpu < pUVM->cCpus, VERR_INVALID_CPU_ID);
215
216	if ((pAddress->fFlags & DBGFADDRESS_FLAGS_TYPE_MASK) == DBGFADDRESS_FLAGS_RING0)
217	{
218	AssertCompile(sizeof(RTHCUINTPTR) <= sizeof(pAddress->FlatPtr));
219	VM_ASSERT_VALID_EXT_RETURN(pUVM->pVM, VERR_INVALID_VM_HANDLE);
220	return VMMR3ReadR0Stack(pUVM->pVM, idCpu, (RTHCUINTPTR)pAddress->FlatPtr, pvBuf, cbRead);
221	}
222	return VMR3ReqPriorityCallWaitU(pUVM, idCpu, (PFNRT)dbgfR3MemRead, 5, pUVM, idCpu, pAddress, pvBuf, cbRead);
223	}
224
225
226	/**
227	* Read a zero terminated string from guest memory.
228	*
229	* @returns VBox status code.
230	*
231	* @param pUVM The user mode VM handle.
232	* @param idCpu The ID of the source CPU context (for the address).
233	* @param pAddress Where to start reading.
234	* @param pszBuf Where to store the string.
235	* @param cchBuf The size of the buffer.
236	*/
237	static DECLCALLBACK(int) dbgfR3MemReadString(PUVM pUVM, VMCPUID idCpu, PCDBGFADDRESS pAddress, char *pszBuf, size_t cchBuf)
238	{
239	/*
240	* Validate the input we use, PGM does the rest.
241	*/
242	if (!DBGFR3AddrIsValid(pUVM, pAddress))
243	return VERR_INVALID_POINTER;
244	if (!VALID_PTR(pszBuf))
245	return VERR_INVALID_POINTER;
246
247	/*
248	* Let dbgfR3MemRead do the job.
249	*/
250	int rc = dbgfR3MemRead(pUVM, idCpu, pAddress, pszBuf, cchBuf);
251
252	/*
253	* Make sure the result is terminated and that overflow is signaled.
254	* This may look a bit reckless with the rc but, it should be fine.
255	*/
256	if (!RTStrEnd(pszBuf, cchBuf))
257	{
258	pszBuf[cchBuf - 1] = '\0';
259	rc = VINF_BUFFER_OVERFLOW;
260	}
261	/*
262	* Handle partial reads (not perfect).
263	*/
264	else if (RT_FAILURE(rc))
265	{
266	if (pszBuf[0])
267	rc = VINF_SUCCESS;
268	}
269
270	return rc;
271	}
272
273
274	/**
275	* Read a zero terminated string from guest memory.
276	*
277	* @returns VBox status code.
278	*
279	* @param pUVM The user mode VM handle.
280	* @param idCpu The ID of the source CPU context (for the address).
281	* @param pAddress Where to start reading.
282	* @param pszBuf Where to store the string.
283	* @param cchBuf The size of the buffer.
284	*/
285	VMMR3DECL(int) DBGFR3MemReadString(PUVM pUVM, VMCPUID idCpu, PCDBGFADDRESS pAddress, char *pszBuf, size_t cchBuf)
286	{
287	/*
288	* Validate and zero output.
289	*/
290	if (!VALID_PTR(pszBuf))
291	return VERR_INVALID_POINTER;
292	if (cchBuf <= 0)
293	return VERR_INVALID_PARAMETER;
294	memset(pszBuf, 0, cchBuf);
295	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
296	AssertReturn(idCpu < pUVM->cCpus, VERR_INVALID_CPU_ID);
297
298	/*
299	* Pass it on to the EMT.
300	*/
301	return VMR3ReqPriorityCallWaitU(pUVM, idCpu, (PFNRT)dbgfR3MemReadString, 5, pUVM, idCpu, pAddress, pszBuf, cchBuf);
302	}
303
304
305	/**
306	* Writes guest memory.
307	*
308	* @returns VBox status code.
309	*
310	* @param pUVM The user mode VM handle.
311	* @param idCpu The ID of the target CPU context (for the address).
312	* @param pAddress Where to start writing.
313	* @param pvBuf The data to write.
314	* @param cbWrite The number of bytes to write.
315	*/
316	static DECLCALLBACK(int) dbgfR3MemWrite(PUVM pUVM, VMCPUID idCpu, PCDBGFADDRESS pAddress, void const *pvBuf, size_t cbWrite)
317	{
318	/*
319	* Validate the input we use, PGM does the rest.
320	*/
321	if (!DBGFR3AddrIsValid(pUVM, pAddress))
322	return VERR_INVALID_POINTER;
323	if (!VALID_PTR(pvBuf))
324	return VERR_INVALID_POINTER;
325	PVM pVM = pUVM->pVM;
326	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
327
328	/*
329	* HMA is always special.
330	*/
331	int rc;
332	if (DBGFADDRESS_IS_HMA(pAddress))
333	{
334	/** @todo write to HMA. */
335	rc = VERR_ACCESS_DENIED;
336	}
337	else
338	{
339	/*
340	* Select PGM function by addressing mode.
341	*/
342	PVMCPU pVCpu = VMMGetCpuById(pVM, idCpu);
343	PGMMODE enmMode = PGMGetGuestMode(pVCpu);
344	if ( enmMode == PGMMODE_REAL
345	\|\| enmMode == PGMMODE_PROTECTED
346	\|\| DBGFADDRESS_IS_PHYS(pAddress) )
347	rc = PGMPhysSimpleWriteGCPhys(pVM, pAddress->FlatPtr, pvBuf, cbWrite);
348	else
349	{
350	#if GC_ARCH_BITS > 32
351	if ( ( pAddress->FlatPtr >= _4G
352	\|\| pAddress->FlatPtr + cbWrite > _4G)
353	&& enmMode != PGMMODE_AMD64
354	&& enmMode != PGMMODE_AMD64_NX)
355	return VERR_PAGE_TABLE_NOT_PRESENT;
356	#endif
357	rc = PGMPhysSimpleWriteGCPtr(pVCpu, pAddress->FlatPtr, pvBuf, cbWrite);
358	}
359	}
360	return rc;
361	}
362
363
364	/**
365	* Read guest memory.
366	*
367	* @returns VBox status code.
368	*
369	* @param pUVM The user mode VM handle.
370	* @param idCpu The ID of the target CPU context (for the address).
371	* @param pAddress Where to start writing.
372	* @param pvBuf The data to write.
373	* @param cbWrite The number of bytes to write.
374	*/
375	VMMR3DECL(int) DBGFR3MemWrite(PUVM pUVM, VMCPUID idCpu, PCDBGFADDRESS pAddress, void const *pvBuf, size_t cbWrite)
376	{
377	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
378	AssertReturn(idCpu < pUVM->cCpus, VERR_INVALID_CPU_ID);
379	return VMR3ReqPriorityCallWaitU(pUVM, idCpu, (PFNRT)dbgfR3MemWrite, 5, pUVM, idCpu, pAddress, pvBuf, cbWrite);
380	}
381
382
383	/**
384	* Worker for DBGFR3SelQueryInfo that calls into SELM.
385	*/
386	static DECLCALLBACK(int) dbgfR3SelQueryInfo(PUVM pUVM, VMCPUID idCpu, RTSEL Sel, uint32_t fFlags, PDBGFSELINFO pSelInfo)
387	{
388	PVM pVM = pUVM->pVM;
389	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
390
391	/*
392	* Make the query.
393	*/
394	int rc;
395	if (!(fFlags & DBGFSELQI_FLAGS_DT_SHADOW))
396	{
397	PVMCPU pVCpu = VMMGetCpuById(pVM, idCpu);
398	VMCPU_ASSERT_EMT(pVCpu);
399	rc = SELMR3GetSelectorInfo(pVM, pVCpu, Sel, pSelInfo);
400
401	/*
402	* 64-bit mode HACKS for making data and stack selectors wide open when
403	* queried. This is voodoo magic.
404	*/
405	if (fFlags & DBGFSELQI_FLAGS_DT_ADJ_64BIT_MODE)
406	{
407	/* Expand 64-bit data and stack selectors. The check is a bit bogus... */
408	if ( RT_SUCCESS(rc)
409	&& (pSelInfo->fFlags & ( DBGFSELINFO_FLAGS_LONG_MODE \| DBGFSELINFO_FLAGS_REAL_MODE \| DBGFSELINFO_FLAGS_PROT_MODE
410	\| DBGFSELINFO_FLAGS_GATE \| DBGFSELINFO_FLAGS_HYPER
411	\| DBGFSELINFO_FLAGS_INVALID \| DBGFSELINFO_FLAGS_NOT_PRESENT))
412	== DBGFSELINFO_FLAGS_LONG_MODE
413	&& pSelInfo->cbLimit != ~(RTGCPTR)0
414	&& CPUMIsGuestIn64BitCode(pVCpu) )
415	{
416	pSelInfo->GCPtrBase = 0;
417	pSelInfo->cbLimit = ~(RTGCPTR)0;
418	}
419	else if ( Sel == 0
420	&& CPUMIsGuestIn64BitCode(pVCpu))
421	{
422	pSelInfo->GCPtrBase = 0;
423	pSelInfo->cbLimit = ~(RTGCPTR)0;
424	pSelInfo->Sel = 0;
425	pSelInfo->SelGate = 0;
426	pSelInfo->fFlags = DBGFSELINFO_FLAGS_LONG_MODE;
427	pSelInfo->u.Raw64.Gen.u1Present = 1;
428	pSelInfo->u.Raw64.Gen.u1Long = 1;
429	pSelInfo->u.Raw64.Gen.u1DescType = 1;
430	rc = VINF_SUCCESS;
431	}
432	}
433	}
434	else
435	{
436	if (!VM_IS_RAW_MODE_ENABLED(pVM))
437	rc = VERR_INVALID_STATE;
438	else
439	rc = SELMR3GetShadowSelectorInfo(pVM, Sel, pSelInfo);
440	}
441	return rc;
442	}
443
444
445	/**
446	* Gets information about a selector.
447	*
448	* Intended for the debugger mostly and will prefer the guest
449	* descriptor tables over the shadow ones.
450	*
451	* @returns VBox status code, the following are the common ones.
452	* @retval VINF_SUCCESS on success.
453	* @retval VERR_INVALID_SELECTOR if the selector isn't fully inside the
454	* descriptor table.
455	* @retval VERR_SELECTOR_NOT_PRESENT if the LDT is invalid or not present. This
456	* is not returned if the selector itself isn't present, you have to
457	* check that for yourself (see DBGFSELINFO::fFlags).
458	* @retval VERR_PAGE_TABLE_NOT_PRESENT or VERR_PAGE_NOT_PRESENT if the
459	* pagetable or page backing the selector table wasn't present.
460	*
461	* @param pUVM The user mode VM handle.
462	* @param idCpu The ID of the virtual CPU context.
463	* @param Sel The selector to get info about.
464	* @param fFlags Flags, see DBGFQSEL_FLAGS_*.
465	* @param pSelInfo Where to store the information. This will always be
466	* updated.
467	*
468	* @remarks This is a wrapper around SELMR3GetSelectorInfo and
469	* SELMR3GetShadowSelectorInfo.
470	*/
471	VMMR3DECL(int) DBGFR3SelQueryInfo(PUVM pUVM, VMCPUID idCpu, RTSEL Sel, uint32_t fFlags, PDBGFSELINFO pSelInfo)
472	{
473	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
474	AssertReturn(idCpu < pUVM->cCpus, VERR_INVALID_CPU_ID);
475	AssertReturn(!(fFlags & ~(DBGFSELQI_FLAGS_DT_GUEST \| DBGFSELQI_FLAGS_DT_SHADOW \| DBGFSELQI_FLAGS_DT_ADJ_64BIT_MODE)), VERR_INVALID_PARAMETER);
476	AssertReturn( (fFlags & (DBGFSELQI_FLAGS_DT_SHADOW \| DBGFSELQI_FLAGS_DT_ADJ_64BIT_MODE))
477	!= (DBGFSELQI_FLAGS_DT_SHADOW \| DBGFSELQI_FLAGS_DT_ADJ_64BIT_MODE), VERR_INVALID_PARAMETER);
478
479	/* Clear the return data here on this thread. */
480	memset(pSelInfo, 0, sizeof(*pSelInfo));
481
482	/*
483	* Dispatch the request to a worker running on the target CPU.
484	*/
485	return VMR3ReqPriorityCallWaitU(pUVM, idCpu, (PFNRT)dbgfR3SelQueryInfo, 5, pUVM, idCpu, Sel, fFlags, pSelInfo);
486	}
487
488
489	/**
490	* Validates a CS selector.
491	*
492	* @returns VBox status code.
493	* @param pSelInfo Pointer to the selector information for the CS selector.
494	* @param SelCPL The selector defining the CPL (SS).
495	*/
496	VMMDECL(int) DBGFR3SelInfoValidateCS(PCDBGFSELINFO pSelInfo, RTSEL SelCPL)
497	{
498	/*
499	* Check if present.
500	*/
501	if (pSelInfo->u.Raw.Gen.u1Present)
502	{
503	/*
504	* Type check.
505	*/
506	if ( pSelInfo->u.Raw.Gen.u1DescType == 1
507	&& (pSelInfo->u.Raw.Gen.u4Type & X86_SEL_TYPE_CODE))
508	{
509	/*
510	* Check level.
511	*/
512	unsigned uLevel = RT_MAX(SelCPL & X86_SEL_RPL, pSelInfo->Sel & X86_SEL_RPL);
513	if ( !(pSelInfo->u.Raw.Gen.u4Type & X86_SEL_TYPE_CONF)
514	? uLevel <= pSelInfo->u.Raw.Gen.u2Dpl
515	: uLevel >= pSelInfo->u.Raw.Gen.u2Dpl /* hope I got this right now... */
516	)
517	return VINF_SUCCESS;
518	return VERR_INVALID_RPL;
519	}
520	return VERR_NOT_CODE_SELECTOR;
521	}
522	return VERR_SELECTOR_NOT_PRESENT;
523	}
524
525
526	/**
527	* Converts a PGM paging mode to a set of DBGFPGDMP_XXX flags.
528	*
529	* @returns Flags. UINT32_MAX if the mode is invalid (asserted).
530	* @param enmMode The mode.
531	*/
532	static uint32_t dbgfR3PagingDumpModeToFlags(PGMMODE enmMode)
533	{
534	switch (enmMode)
535	{
536	case PGMMODE_32_BIT:
537	return DBGFPGDMP_FLAGS_PSE;
538	case PGMMODE_PAE:
539	return DBGFPGDMP_FLAGS_PSE \| DBGFPGDMP_FLAGS_PAE;
540	case PGMMODE_PAE_NX:
541	return DBGFPGDMP_FLAGS_PSE \| DBGFPGDMP_FLAGS_PAE \| DBGFPGDMP_FLAGS_NXE;
542	case PGMMODE_AMD64:
543	return DBGFPGDMP_FLAGS_PSE \| DBGFPGDMP_FLAGS_PAE \| DBGFPGDMP_FLAGS_LME;
544	case PGMMODE_AMD64_NX:
545	return DBGFPGDMP_FLAGS_PSE \| DBGFPGDMP_FLAGS_PAE \| DBGFPGDMP_FLAGS_LME \| DBGFPGDMP_FLAGS_NXE;
546	case PGMMODE_NESTED:
547	return DBGFPGDMP_FLAGS_NP;
548	case PGMMODE_EPT:
549	return DBGFPGDMP_FLAGS_EPT;
550	default:
551	AssertFailedReturn(UINT32_MAX);
552	}
553	}
554
555
556	/**
557	* EMT worker for DBGFR3PagingDumpEx.
558	*
559	* @returns VBox status code.
560	* @param pUVM The shared VM handle.
561	* @param idCpu The current CPU ID.
562	* @param fFlags The flags, DBGFPGDMP_FLAGS_XXX. Valid.
563	* @param pcr3 The CR3 to use (unless we're getting the current
564	* state, see @a fFlags).
565	* @param pu64FirstAddr The first address.
566	* @param pu64LastAddr The last address.
567	* @param cMaxDepth The depth.
568	* @param pHlp The output callbacks.
569	*/
570	static DECLCALLBACK(int) dbgfR3PagingDumpEx(PUVM pUVM, VMCPUID idCpu, uint32_t fFlags, uint64_t *pcr3,
571	uint64_t pu64FirstAddr, uint64_t pu64LastAddr,
572	uint32_t cMaxDepth, PCDBGFINFOHLP pHlp)
573	{
574	/*
575	* Implement dumping both context by means of recursion.
576	*/
577	if ((fFlags & (DBGFPGDMP_FLAGS_GUEST \| DBGFPGDMP_FLAGS_SHADOW)) == (DBGFPGDMP_FLAGS_GUEST \| DBGFPGDMP_FLAGS_SHADOW))
578	{
579	int rc1 = dbgfR3PagingDumpEx(pUVM, idCpu, fFlags & ~DBGFPGDMP_FLAGS_GUEST,
580	pcr3, pu64FirstAddr, pu64LastAddr, cMaxDepth, pHlp);
581	int rc2 = dbgfR3PagingDumpEx(pUVM, idCpu, fFlags & ~DBGFPGDMP_FLAGS_SHADOW,
582	pcr3, pu64FirstAddr, pu64LastAddr, cMaxDepth, pHlp);
583	return RT_FAILURE(rc1) ? rc1 : rc2;
584	}
585
586	PVM pVM = pUVM->pVM;
587	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
588
589	/*
590	* Get the current CR3/mode if required.
591	*/
592	uint64_t cr3 = *pcr3;
593	if (fFlags & (DBGFPGDMP_FLAGS_CURRENT_CR3 \| DBGFPGDMP_FLAGS_CURRENT_MODE))
594	{
595	PVMCPU pVCpu = &pVM->aCpus[idCpu];
596	if (fFlags & DBGFPGDMP_FLAGS_SHADOW)
597	{
598	if (fFlags & DBGFPGDMP_FLAGS_CURRENT_CR3)
599	cr3 = PGMGetHyperCR3(pVCpu);
600	if (fFlags & DBGFPGDMP_FLAGS_CURRENT_MODE)
601	{
602	fFlags \|= dbgfR3PagingDumpModeToFlags(PGMGetShadowMode(pVCpu));
603	if (fFlags & DBGFPGDMP_FLAGS_NP)
604	{
605	fFlags \|= dbgfR3PagingDumpModeToFlags(PGMGetHostMode(pVM));
606	if (HC_ARCH_BITS == 32 && CPUMIsGuestInLongMode(pVCpu))
607	fFlags \|= DBGFPGDMP_FLAGS_LME;
608	}
609	}
610	}
611	else
612	{
613	if (fFlags & DBGFPGDMP_FLAGS_CURRENT_CR3)
614	cr3 = CPUMGetGuestCR3(pVCpu);
615	if (fFlags & DBGFPGDMP_FLAGS_CURRENT_MODE)
616	{
617	AssertCompile(DBGFPGDMP_FLAGS_PSE == X86_CR4_PSE); AssertCompile(DBGFPGDMP_FLAGS_PAE == X86_CR4_PAE);
618	fFlags \|= CPUMGetGuestCR4(pVCpu) & (X86_CR4_PSE \| X86_CR4_PAE);
619	AssertCompile(DBGFPGDMP_FLAGS_LME == MSR_K6_EFER_LME); AssertCompile(DBGFPGDMP_FLAGS_NXE == MSR_K6_EFER_NXE);
620	fFlags \|= CPUMGetGuestEFER(pVCpu) & (MSR_K6_EFER_LME \| MSR_K6_EFER_NXE);
621	}
622	}
623	}
624	fFlags &= ~(DBGFPGDMP_FLAGS_CURRENT_MODE \| DBGFPGDMP_FLAGS_CURRENT_CR3);
625
626	/*
627	* Call PGM to do the real work.
628	*/
629	int rc;
630	if (fFlags & DBGFPGDMP_FLAGS_SHADOW)
631	rc = PGMR3DumpHierarchyShw(pVM, cr3, fFlags, pu64FirstAddr, pu64LastAddr, cMaxDepth, pHlp);
632	else
633	rc = PGMR3DumpHierarchyGst(pVM, cr3, fFlags, pu64FirstAddr, pu64LastAddr, cMaxDepth, pHlp);
634	return rc;
635	}
636
637
638	/**
639	* Dump paging structures.
640	*
641	* This API can be used to dump both guest and shadow structures.
642	*
643	* @returns VBox status code.
644	* @param pUVM The user mode VM handle.
645	* @param idCpu The current CPU ID.
646	* @param fFlags The flags, DBGFPGDMP_FLAGS_XXX.
647	* @param cr3 The CR3 to use (unless we're getting the current
648	* state, see @a fFlags).
649	* @param u64FirstAddr The address to start dumping at.
650	* @param u64LastAddr The address to end dumping after.
651	* @param cMaxDepth The depth.
652	* @param pHlp The output callbacks. Defaults to the debug log if
653	* NULL.
654	*/
655	VMMDECL(int) DBGFR3PagingDumpEx(PUVM pUVM, VMCPUID idCpu, uint32_t fFlags, uint64_t cr3, uint64_t u64FirstAddr,
656	uint64_t u64LastAddr, uint32_t cMaxDepth, PCDBGFINFOHLP pHlp)
657	{
658	/*
659	* Input validation.
660	*/
661	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
662	AssertReturn(idCpu < pUVM->cCpus, VERR_INVALID_CPU_ID);
663	AssertReturn(!(fFlags & ~DBGFPGDMP_FLAGS_VALID_MASK), VERR_INVALID_PARAMETER);
664	AssertReturn(fFlags & (DBGFPGDMP_FLAGS_SHADOW \| DBGFPGDMP_FLAGS_GUEST), VERR_INVALID_PARAMETER);
665	AssertReturn((fFlags & DBGFPGDMP_FLAGS_CURRENT_MODE) \|\| !(fFlags & DBGFPGDMP_FLAGS_MODE_MASK), VERR_INVALID_PARAMETER);
666	AssertReturn( !(fFlags & DBGFPGDMP_FLAGS_EPT)
667	\|\| !(fFlags & (DBGFPGDMP_FLAGS_LME \| DBGFPGDMP_FLAGS_PAE \| DBGFPGDMP_FLAGS_PSE \| DBGFPGDMP_FLAGS_NXE))
668	, VERR_INVALID_PARAMETER);
669	AssertPtrReturn(pHlp, VERR_INVALID_POINTER);
670	AssertReturn(cMaxDepth, VERR_INVALID_PARAMETER);
671
672	/*
673	* Forward the request to the target CPU.
674	*/
675	return VMR3ReqPriorityCallWaitU(pUVM, idCpu, (PFNRT)dbgfR3PagingDumpEx, 8,
676	pUVM, idCpu, fFlags, &cr3, &u64FirstAddr, &u64LastAddr, cMaxDepth, pHlp);
677	}
678

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source: vbox/trunk/src/VBox/VMM/VMMR3/DBGFMem.cpp@ 72064

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