DBGFAddr.cpp@ 57166

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1	/* $Id: DBGFAddr.cpp 56287 2015-06-09 11:15:22Z vboxsync $ */
2	/** @file
3	* DBGF - Debugger Facility, Mixed Address Methods.
4	*/
5
6	/*
7	* Copyright (C) 2006-2015 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/mm.h>
27	#include <VBox/vmm/hm.h>
28	#include "DBGFInternal.h"
29	#include <VBox/vmm/vm.h>
30	#include <VBox/vmm/uvm.h>
31
32	#include <VBox/param.h>
33	#include <VBox/err.h>
34	#include <VBox/log.h>
35	#include "internal/pgm.h"
36
37
38
39	/**
40	* Checks if an address is in the HMA or not.
41	*
42	* @retval true if it's inside the HMA.
43	* @retval flase if it's not inside the HMA.
44	*
45	* @param pUVM The user mode VM handle.
46	* @param FlatPtr The address in question.
47	*/
48	DECLINLINE(bool) dbgfR3IsHMA(PUVM pUVM, RTGCUINTPTR FlatPtr)
49	{
50	return !HMIsEnabled(pUVM->pVM)
51	&& MMHyperIsInsideArea(pUVM->pVM, FlatPtr);
52	}
53
54
55	/**
56	* Common worker for DBGFR3AddrFromSelOff and DBGFR3AddrFromSelInfoOff.
57	*/
58	static int dbgfR3AddrFromSelInfoOffWorker(PDBGFADDRESS pAddress, PCDBGFSELINFO pSelInfo, RTUINTPTR off)
59	{
60	if (pSelInfo->fFlags & (DBGFSELINFO_FLAGS_INVALID \| DBGFSELINFO_FLAGS_NOT_PRESENT))
61	return pSelInfo->fFlags & DBGFSELINFO_FLAGS_NOT_PRESENT
62	? VERR_SELECTOR_NOT_PRESENT
63	: VERR_INVALID_SELECTOR;
64
65	/** @todo This all goes voodoo in long mode. */
66	/* check limit. */
67	if (DBGFSelInfoIsExpandDown(pSelInfo))
68	{
69	if ( !pSelInfo->u.Raw.Gen.u1Granularity
70	&& off > UINT32_C(0xffff))
71	return VERR_OUT_OF_SELECTOR_BOUNDS;
72	if (off <= pSelInfo->cbLimit)
73	return VERR_OUT_OF_SELECTOR_BOUNDS;
74	}
75	else if (off > pSelInfo->cbLimit)
76	return VERR_OUT_OF_SELECTOR_BOUNDS;
77
78	pAddress->FlatPtr = pSelInfo->GCPtrBase + off;
79
80	/** @todo fix all these selector tests! */
81	if ( !pSelInfo->GCPtrBase
82	&& pSelInfo->u.Raw.Gen.u1Granularity
83	&& pSelInfo->u.Raw.Gen.u1DefBig)
84	pAddress->fFlags = DBGFADDRESS_FLAGS_FLAT;
85	else if (pSelInfo->cbLimit <= UINT32_C(0xffff))
86	pAddress->fFlags = DBGFADDRESS_FLAGS_FAR16;
87	else if (pSelInfo->cbLimit <= UINT32_C(0xffffffff))
88	pAddress->fFlags = DBGFADDRESS_FLAGS_FAR32;
89	else
90	pAddress->fFlags = DBGFADDRESS_FLAGS_FAR64;
91
92	return VINF_SUCCESS;
93	}
94
95
96	/**
97	* Creates a mixed address from a Sel:off pair.
98	*
99	* @returns VBox status code.
100	* @param pUVM The user mode VM handle.
101	* @param idCpu The CPU ID.
102	* @param pAddress Where to store the mixed address.
103	* @param Sel The selector part.
104	* @param off The offset part.
105	*/
106	VMMR3DECL(int) DBGFR3AddrFromSelOff(PUVM pUVM, VMCPUID idCpu, PDBGFADDRESS pAddress, RTSEL Sel, RTUINTPTR off)
107	{
108	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
109	VM_ASSERT_VALID_EXT_RETURN(pUVM->pVM, VERR_INVALID_VM_HANDLE);
110	AssertReturn(idCpu < pUVM->cCpus, VERR_INVALID_PARAMETER);
111
112	pAddress->Sel = Sel;
113	pAddress->off = off;
114	if (Sel != DBGF_SEL_FLAT)
115	{
116	DBGFSELINFO SelInfo;
117	int rc = DBGFR3SelQueryInfo(pUVM, idCpu, Sel, DBGFSELQI_FLAGS_DT_GUEST \| DBGFSELQI_FLAGS_DT_ADJ_64BIT_MODE, &SelInfo);
118	if (RT_FAILURE(rc) && !HMIsEnabled(pUVM->pVM))
119	rc = DBGFR3SelQueryInfo(pUVM, idCpu, Sel, DBGFSELQI_FLAGS_DT_SHADOW, &SelInfo);
120	if (RT_FAILURE(rc))
121	return rc;
122	rc = dbgfR3AddrFromSelInfoOffWorker(pAddress, &SelInfo, off);
123	if (RT_FAILURE(rc))
124	return rc;
125	if ( (SelInfo.fFlags & DBGFSELINFO_FLAGS_HYPER)
126	\|\| dbgfR3IsHMA(pUVM, pAddress->FlatPtr))
127	pAddress->fFlags \|= DBGFADDRESS_FLAGS_HMA;
128	}
129	else
130	{
131	pAddress->FlatPtr = off;
132	pAddress->fFlags = DBGFADDRESS_FLAGS_FLAT;
133	if (dbgfR3IsHMA(pUVM, pAddress->FlatPtr))
134	pAddress->fFlags \|= DBGFADDRESS_FLAGS_HMA;
135	}
136	pAddress->fFlags \|= DBGFADDRESS_FLAGS_VALID;
137
138	return VINF_SUCCESS;
139	}
140
141
142	/**
143	* Creates a mixed address from selector info and an offset into the segment
144	* described by it.
145	*
146	* @returns VBox status code.
147	* @param pUVM The user mode VM handle.
148	* @param idCpu The CPU ID.
149	* @param pAddress Where to store the mixed address.
150	* @param pSelInfo The selector info.
151	* @param off The offset part.
152	*/
153	VMMR3DECL(int) DBGFR3AddrFromSelInfoOff(PUVM pUVM, PDBGFADDRESS pAddress, PCDBGFSELINFO pSelInfo, RTUINTPTR off)
154	{
155	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
156	VM_ASSERT_VALID_EXT_RETURN(pUVM->pVM, VERR_INVALID_VM_HANDLE);
157
158	pAddress->Sel = pSelInfo->Sel;
159	pAddress->off = off;
160	int rc = dbgfR3AddrFromSelInfoOffWorker(pAddress, pSelInfo, off);
161	if (RT_FAILURE(rc))
162	return rc;
163
164	pAddress->fFlags \|= DBGFADDRESS_FLAGS_VALID;
165	if (dbgfR3IsHMA(pUVM, pAddress->FlatPtr))
166	pAddress->fFlags \|= DBGFADDRESS_FLAGS_HMA;
167
168	return VINF_SUCCESS;
169	}
170
171
172	/**
173	* Creates a mixed address from a flat address.
174	*
175	* @returns pAddress.
176	* @param pUVM The user mode VM handle.
177	* @param pAddress Where to store the mixed address.
178	* @param FlatPtr The flat pointer.
179	*/
180	VMMR3DECL(PDBGFADDRESS) DBGFR3AddrFromFlat(PUVM pUVM, PDBGFADDRESS pAddress, RTGCUINTPTR FlatPtr)
181	{
182	UVM_ASSERT_VALID_EXT_RETURN(pUVM, NULL);
183	VM_ASSERT_VALID_EXT_RETURN(pUVM->pVM, NULL);
184	pAddress->Sel = DBGF_SEL_FLAT;
185	pAddress->off = FlatPtr;
186	pAddress->FlatPtr = FlatPtr;
187	pAddress->fFlags = DBGFADDRESS_FLAGS_FLAT \| DBGFADDRESS_FLAGS_VALID;
188	if (dbgfR3IsHMA(pUVM, pAddress->FlatPtr))
189	pAddress->fFlags \|= DBGFADDRESS_FLAGS_HMA;
190	return pAddress;
191	}
192
193
194	/**
195	* Creates a mixed address from a guest physical address.
196	*
197	* @returns pAddress.
198	* @param pUVM The user mode VM handle.
199	* @param pAddress Where to store the mixed address.
200	* @param PhysAddr The guest physical address.
201	*/
202	VMMR3DECL(PDBGFADDRESS) DBGFR3AddrFromPhys(PUVM pUVM, PDBGFADDRESS pAddress, RTGCPHYS PhysAddr)
203	{
204	UVM_ASSERT_VALID_EXT_RETURN(pUVM, NULL);
205	pAddress->Sel = DBGF_SEL_FLAT;
206	pAddress->off = PhysAddr;
207	pAddress->FlatPtr = PhysAddr;
208	pAddress->fFlags = DBGFADDRESS_FLAGS_PHYS \| DBGFADDRESS_FLAGS_VALID;
209	return pAddress;
210	}
211
212
213	/**
214	* Checks if the specified address is valid (checks the structure pointer too).
215	*
216	* @returns true if valid.
217	* @returns false if invalid.
218	* @param pUVM The user mode VM handle.
219	* @param pAddress The address to validate.
220	*/
221	VMMR3DECL(bool) DBGFR3AddrIsValid(PUVM pUVM, PCDBGFADDRESS pAddress)
222	{
223	UVM_ASSERT_VALID_EXT_RETURN(pUVM, false);
224	if (!VALID_PTR(pAddress))
225	return false;
226	if (!DBGFADDRESS_IS_VALID(pAddress))
227	return false;
228	/* more? */
229	return true;
230	}
231
232
233	/**
234	* Called on the EMT for the VCpu.
235	*
236	* @returns VBox status code.
237	* @param pVCpu Pointer to the VMCPU.
238	* @param pAddress The address.
239	* @param pGCPhys Where to return the physical address.
240	*/
241	static DECLCALLBACK(int) dbgfR3AddrToPhysOnVCpu(PVMCPU pVCpu, PDBGFADDRESS pAddress, PRTGCPHYS pGCPhys)
242	{
243	VMCPU_ASSERT_EMT(pVCpu);
244	/* This is just a wrapper because we cannot pass FlatPtr thru VMR3ReqCall directly. */
245	return PGMGstGetPage(pVCpu, pAddress->FlatPtr, NULL, pGCPhys);
246	}
247
248
249	/**
250	* Converts an address to a guest physical address.
251	*
252	* @returns VBox status code.
253	* @retval VINF_SUCCESS
254	* @retval VERR_INVALID_PARAMETER if the address is invalid.
255	* @retval VERR_INVALID_STATE if the VM is being terminated or if the virtual
256	* CPU handle is invalid.
257	* @retval VERR_NOT_SUPPORTED is the type of address cannot be converted.
258	* @retval VERR_PAGE_NOT_PRESENT
259	* @retval VERR_PAGE_TABLE_NOT_PRESENT
260	* @retval VERR_PAGE_DIRECTORY_PTR_NOT_PRESENT
261	* @retval VERR_PAGE_MAP_LEVEL4_NOT_PRESENT
262	*
263	* @param pUVM The user mode VM handle.
264	* @param idCpu The ID of the CPU context to convert virtual
265	* addresses.
266	* @param pAddress The address.
267	* @param pGCPhys Where to return the physical address.
268	*/
269	VMMR3DECL(int) DBGFR3AddrToPhys(PUVM pUVM, VMCPUID idCpu, PDBGFADDRESS pAddress, PRTGCPHYS pGCPhys)
270	{
271	/*
272	* Parameter validation.
273	*/
274	AssertPtr(pGCPhys);
275	*pGCPhys = NIL_RTGCPHYS;
276	AssertPtr(pAddress);
277	AssertReturn(DBGFADDRESS_IS_VALID(pAddress), VERR_INVALID_PARAMETER);
278	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_STATE);
279	PVM pVM = pUVM->pVM;
280	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
281	AssertReturn(idCpu < pUVM->cCpus, VERR_INVALID_PARAMETER);
282
283	/*
284	* Convert by address type.
285	*/
286	int rc;
287	if (pAddress->fFlags & DBGFADDRESS_FLAGS_HMA)
288	rc = VERR_NOT_SUPPORTED;
289	else if (pAddress->fFlags & DBGFADDRESS_FLAGS_PHYS)
290	{
291	*pGCPhys = pAddress->FlatPtr;
292	rc = VINF_SUCCESS;
293	}
294	else
295	{
296	PVMCPU pVCpu = VMMGetCpuById(pVM, idCpu);
297	if (VMCPU_IS_EMT(pVCpu))
298	rc = dbgfR3AddrToPhysOnVCpu(pVCpu, pAddress, pGCPhys);
299	else
300	rc = VMR3ReqPriorityCallWaitU(pUVM, pVCpu->idCpu,
301	(PFNRT)dbgfR3AddrToPhysOnVCpu, 3, pVCpu, pAddress, pGCPhys);
302	}
303	return rc;
304	}
305
306
307	/**
308	* Converts an address to a host physical address.
309	*
310	* @returns VBox status code.
311	* @retval VINF_SUCCESS
312	* @retval VERR_INVALID_PARAMETER if the address is invalid.
313	* @retval VERR_INVALID_STATE if the VM is being terminated or if the virtual
314	* CPU handle is invalid.
315	* @retval VERR_NOT_SUPPORTED is the type of address cannot be converted.
316	* @retval VERR_PAGE_NOT_PRESENT
317	* @retval VERR_PAGE_TABLE_NOT_PRESENT
318	* @retval VERR_PAGE_DIRECTORY_PTR_NOT_PRESENT
319	* @retval VERR_PAGE_MAP_LEVEL4_NOT_PRESENT
320	* @retval VERR_PGM_PHYS_PAGE_RESERVED
321	* @retval VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS
322	*
323	* @param pUVM The user mode VM handle.
324	* @param idCpu The ID of the CPU context to convert virtual
325	* addresses.
326	* @param pAddress The address.
327	* @param pHCPhys Where to return the physical address.
328	*/
329	VMMR3DECL(int) DBGFR3AddrToHostPhys(PUVM pUVM, VMCPUID idCpu, PDBGFADDRESS pAddress, PRTHCPHYS pHCPhys)
330	{
331	/*
332	* Parameter validation.
333	*/
334	AssertPtr(pHCPhys);
335	*pHCPhys = NIL_RTHCPHYS;
336	AssertPtr(pAddress);
337	AssertReturn(DBGFADDRESS_IS_VALID(pAddress), VERR_INVALID_PARAMETER);
338	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_STATE);
339	PVM pVM = pUVM->pVM;
340	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
341	AssertReturn(idCpu < pUVM->cCpus, VERR_INVALID_PARAMETER);
342
343	/*
344	* Convert it if we can.
345	*/
346	int rc;
347	if (pAddress->fFlags & DBGFADDRESS_FLAGS_HMA)
348	rc = VERR_NOT_SUPPORTED; /** @todo implement this */
349	else
350	{
351	RTGCPHYS GCPhys;
352	rc = DBGFR3AddrToPhys(pUVM, idCpu, pAddress, &GCPhys);
353	if (RT_SUCCESS(rc))
354	rc = PGMPhysGCPhys2HCPhys(pVM, pAddress->FlatPtr, pHCPhys);
355	}
356	return rc;
357	}
358
359
360	/**
361	* Called on the EMT for the VCpu.
362	*
363	* @returns VBox status code.
364	*
365	* @param pUVM The user mode VM handle.
366	* @param idCpu The ID of the CPU context.
367	* @param pAddress The address.
368	* @param fReadOnly Whether returning a read-only page is fine or not.
369	* @param ppvR3Ptr Where to return the address.
370	*/
371	static DECLCALLBACK(int) dbgfR3AddrToVolatileR3PtrOnVCpu(PUVM pUVM, VMCPUID idCpu, PDBGFADDRESS pAddress, bool fReadOnly,
372	void **ppvR3Ptr)
373	{
374	PVM pVM = pUVM->pVM;
375	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
376	Assert(idCpu == VMMGetCpuId(pVM));
377
378	int rc;
379	if (pAddress->fFlags & DBGFADDRESS_FLAGS_HMA)
380	{
381	rc = VERR_NOT_SUPPORTED; /** @todo create some dedicated errors for this stuff. */
382	/** @todo this may assert, create a debug version of this which doesn't. */
383	if ( !HMIsEnabled(pVM)
384	&& MMHyperIsInsideArea(pVM, pAddress->FlatPtr))
385	{
386	void *pv = MMHyperRCToCC(pVM, (RTRCPTR)pAddress->FlatPtr);
387	if (pv)
388	{
389	*ppvR3Ptr = pv;
390	rc = VINF_SUCCESS;
391	}
392	}
393	}
394	else
395	{
396	/*
397	* This is a tad ugly, but it gets the job done.
398	*/
399	PGMPAGEMAPLOCK Lock;
400	if (pAddress->fFlags & DBGFADDRESS_FLAGS_PHYS)
401	{
402	if (fReadOnly)
403	rc = PGMPhysGCPhys2CCPtrReadOnly(pVM, pAddress->FlatPtr, (void const **)ppvR3Ptr, &Lock);
404	else
405	rc = PGMPhysGCPhys2CCPtr(pVM, pAddress->FlatPtr, ppvR3Ptr, &Lock);
406	}
407	else
408	{
409	PVMCPU pVCpu = VMMGetCpuById(pVM, idCpu);
410	if (fReadOnly)
411	rc = PGMPhysGCPtr2CCPtrReadOnly(pVCpu, pAddress->FlatPtr, (void const **)ppvR3Ptr, &Lock);
412	else
413	rc = PGMPhysGCPtr2CCPtr(pVCpu, pAddress->FlatPtr, ppvR3Ptr, &Lock);
414	}
415	if (RT_SUCCESS(rc))
416	PGMPhysReleasePageMappingLock(pVM, &Lock);
417	}
418	return rc;
419	}
420
421
422
423
424	/**
425	* Converts an address to a volatile host virtual address.
426	*
427	* @returns VBox status code.
428	* @retval VINF_SUCCESS
429	* @retval VERR_INVALID_PARAMETER if the address is invalid.
430	* @retval VERR_INVALID_STATE if the VM is being terminated or if the virtual
431	* CPU handle is invalid.
432	* @retval VERR_NOT_SUPPORTED is the type of address cannot be converted.
433	* @retval VERR_PAGE_NOT_PRESENT
434	* @retval VERR_PAGE_TABLE_NOT_PRESENT
435	* @retval VERR_PAGE_DIRECTORY_PTR_NOT_PRESENT
436	* @retval VERR_PAGE_MAP_LEVEL4_NOT_PRESENT
437	* @retval VERR_PGM_PHYS_PAGE_RESERVED
438	* @retval VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS
439	*
440	* @param pUVM The user mode VM handle.
441	* @param idCpu The ID of the CPU context to convert virtual
442	* addresses.
443	* @param pAddress The address.
444	* @param fReadOnly Whether returning a read-only page is fine or not.
445	* If set to thru the page may have to be made writable
446	* before we return.
447	* @param ppvR3Ptr Where to return the address.
448	*/
449	VMMR3DECL(int) DBGFR3AddrToVolatileR3Ptr(PUVM pUVM, VMCPUID idCpu, PDBGFADDRESS pAddress, bool fReadOnly, void **ppvR3Ptr)
450	{
451	/*
452	* Parameter validation.
453	*/
454	AssertPtr(ppvR3Ptr);
455	*ppvR3Ptr = NULL;
456	AssertPtr(pAddress);
457	AssertReturn(DBGFADDRESS_IS_VALID(pAddress), VERR_INVALID_PARAMETER);
458	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_STATE);
459	AssertReturn(idCpu < pUVM->cCpus, VERR_INVALID_PARAMETER);
460
461	/*
462	* Convert it.
463	*/
464	return VMR3ReqPriorityCallWaitU(pUVM, idCpu, (PFNRT)dbgfR3AddrToVolatileR3PtrOnVCpu, 5,
465	pUVM, idCpu, pAddress, fReadOnly, ppvR3Ptr);
466	}
467
468
469	/**
470	* Adds an offset to an address.
471	*
472	* @returns pAddress.
473	*
474	* @param pAddress The address.
475	* @param uAddend How much to add.
476	*
477	* @remarks No address space or segment limit checks are performed,
478	*/
479	VMMR3DECL(PDBGFADDRESS) DBGFR3AddrAdd(PDBGFADDRESS pAddress, RTGCUINTPTR uAddend)
480	{
481	/*
482	* Parameter validation.
483	*/
484	AssertPtrReturn(pAddress, NULL);
485	AssertReturn(DBGFADDRESS_IS_VALID(pAddress), NULL);
486
487	/*
488	* Add the stuff.
489	*/
490	pAddress->off += uAddend;
491	pAddress->FlatPtr += uAddend;
492
493	return pAddress;
494	}
495
496
497	/**
498	* Subtracts an offset from an address.
499	*
500	* @returns VINF_SUCCESS on success.
501	*
502	* @param pAddress The address.
503	* @param uSubtrahend How much to subtract.
504	*
505	* @remarks No address space or segment limit checks are performed,
506	*/
507	VMMR3DECL(PDBGFADDRESS) DBGFR3AddrSub(PDBGFADDRESS pAddress, RTGCUINTPTR uSubtrahend)
508	{
509	/*
510	* Parameter validation.
511	*/
512	AssertPtrReturn(pAddress, NULL);
513	AssertReturn(DBGFADDRESS_IS_VALID(pAddress), NULL);
514
515	/*
516	* Add the stuff.
517	*/
518	pAddress->off -= uSubtrahend;
519	pAddress->FlatPtr -= uSubtrahend;
520
521	return pAddress;
522	}
523

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source: vbox/trunk/src/VBox/VMM/VMMR3/DBGFAddr.cpp@ 57166

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