memobj-r0drv-nt.cpp@ 25720

最後變更在這個檔案從25720是 23610,由 vboxsync 提交於 15 年前
IPRT,VMM,SUPDrv,VBGLR0: Added a parameter to RTR0MemObjLockUser/Kernel that indicates read/write intent so we can correctly lock readonly memory on Windows and OS/2. (Guest property strings, see #4238.)
屬性 svn:eol-style 設為 `native` 屬性 svn:keywords 設為 `Id`
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1	/* $Id: memobj-r0drv-nt.cpp 23610 2009-10-07 21:22:10Z vboxsync $ */
2	/** @file
3	* IPRT - Ring-0 Memory Objects, NT.
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 Sun Microsystems, Inc.
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.alldomusa.eu.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	* The contents of this file may alternatively be used under the terms
18	* of the Common Development and Distribution License Version 1.0
19	* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20	* VirtualBox OSE distribution, in which case the provisions of the
21	* CDDL are applicable instead of those of the GPL.
22	*
23	* You may elect to license modified versions of this file under the
24	* terms and conditions of either the GPL or the CDDL or both.
25	*
26	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
27	* Clara, CA 95054 USA or visit http://www.sun.com if you need
28	* additional information or have any questions.
29	*/
30
31
32	/*******************************************************************************
33	* Header Files *
34	*******************************************************************************/
35	#include "the-nt-kernel.h"
36
37	#include <iprt/memobj.h>
38	#include <iprt/alloc.h>
39	#include <iprt/assert.h>
40	#include <iprt/log.h>
41	#include <iprt/param.h>
42	#include <iprt/string.h>
43	#include <iprt/process.h>
44	#include "internal/memobj.h"
45
46
47	/*******************************************************************************
48	* Defined Constants And Macros *
49	*******************************************************************************/
50	/** Maximum number of bytes we try to lock down in one go.
51	* This is supposed to have a limit right below 256MB, but this appears
52	* to actually be much lower. The values here have been determined experimentally.
53	*/
54	#ifdef RT_ARCH_X86
55	# define MAX_LOCK_MEM_SIZE (3210241024) /* 32MB */
56	#endif
57	#ifdef RT_ARCH_AMD64
58	# define MAX_LOCK_MEM_SIZE (2410241024) /* 24MB */
59	#endif
60
61
62	/*******************************************************************************
63	* Structures and Typedefs *
64	*******************************************************************************/
65	/**
66	* The NT version of the memory object structure.
67	*/
68	typedef struct RTR0MEMOBJNT
69	{
70	/** The core structure. */
71	RTR0MEMOBJINTERNAL Core;
72	#ifndef IPRT_TARGET_NT4
73	/** Used MmAllocatePagesForMdl(). */
74	bool fAllocatedPagesForMdl;
75	#endif
76	/** Pointer returned by MmSecureVirtualMemory */
77	PVOID pvSecureMem;
78	/** The number of PMDLs (memory descriptor lists) in the array. */
79	uint32_t cMdls;
80	/** Array of MDL pointers. (variable size) */
81	PMDL apMdls[1];
82	} RTR0MEMOBJNT, *PRTR0MEMOBJNT;
83
84
85	int rtR0MemObjNativeFree(RTR0MEMOBJ pMem)
86	{
87	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)pMem;
88
89	/*
90	* Deal with it on a per type basis (just as a variation).
91	*/
92	switch (pMemNt->Core.enmType)
93	{
94	case RTR0MEMOBJTYPE_LOW:
95	#ifndef IPRT_TARGET_NT4
96	if (pMemNt->fAllocatedPagesForMdl)
97	{
98	Assert(pMemNt->Core.pv && pMemNt->cMdls == 1 && pMemNt->apMdls[0]);
99	MmUnmapLockedPages(pMemNt->Core.pv, pMemNt->apMdls[0]);
100	pMemNt->Core.pv = NULL;
101	if (pMemNt->pvSecureMem)
102	{
103	MmUnsecureVirtualMemory(pMemNt->pvSecureMem);
104	pMemNt->pvSecureMem = NULL;
105	}
106
107	MmFreePagesFromMdl(pMemNt->apMdls[0]);
108	ExFreePool(pMemNt->apMdls[0]);
109	pMemNt->apMdls[0] = NULL;
110	pMemNt->cMdls = 0;
111	break;
112	}
113	#endif
114	AssertFailed();
115	break;
116
117	case RTR0MEMOBJTYPE_PAGE:
118	Assert(pMemNt->Core.pv);
119	ExFreePool(pMemNt->Core.pv);
120	pMemNt->Core.pv = NULL;
121
122	Assert(pMemNt->cMdls == 1 && pMemNt->apMdls[0]);
123	IoFreeMdl(pMemNt->apMdls[0]);
124	pMemNt->apMdls[0] = NULL;
125	pMemNt->cMdls = 0;
126	break;
127
128	case RTR0MEMOBJTYPE_CONT:
129	Assert(pMemNt->Core.pv);
130	MmFreeContiguousMemory(pMemNt->Core.pv);
131	pMemNt->Core.pv = NULL;
132
133	Assert(pMemNt->cMdls == 1 && pMemNt->apMdls[0]);
134	IoFreeMdl(pMemNt->apMdls[0]);
135	pMemNt->apMdls[0] = NULL;
136	pMemNt->cMdls = 0;
137	break;
138
139	case RTR0MEMOBJTYPE_PHYS:
140	case RTR0MEMOBJTYPE_PHYS_NC:
141	#ifndef IPRT_TARGET_NT4
142	if (pMemNt->fAllocatedPagesForMdl)
143	{
144	MmFreePagesFromMdl(pMemNt->apMdls[0]);
145	ExFreePool(pMemNt->apMdls[0]);
146	pMemNt->apMdls[0] = NULL;
147	pMemNt->cMdls = 0;
148	break;
149	}
150	#endif
151	AssertFailed();
152	break;
153
154	case RTR0MEMOBJTYPE_LOCK:
155	if (pMemNt->pvSecureMem)
156	{
157	MmUnsecureVirtualMemory(pMemNt->pvSecureMem);
158	pMemNt->pvSecureMem = NULL;
159	}
160	for (uint32_t i = 0; i < pMemNt->cMdls; i++)
161	{
162	MmUnlockPages(pMemNt->apMdls[i]);
163	IoFreeMdl(pMemNt->apMdls[i]);
164	pMemNt->apMdls[i] = NULL;
165	}
166	break;
167
168	case RTR0MEMOBJTYPE_RES_VIRT:
169	/* if (pMemNt->Core.u.ResVirt.R0Process == NIL_RTR0PROCESS)
170	{
171	}
172	else
173	{
174	}*/
175	AssertMsgFailed(("RTR0MEMOBJTYPE_RES_VIRT\n"));
176	return VERR_INTERNAL_ERROR;
177	break;
178
179	case RTR0MEMOBJTYPE_MAPPING:
180	{
181	Assert(pMemNt->cMdls == 0 && pMemNt->Core.pv);
182	PRTR0MEMOBJNT pMemNtParent = (PRTR0MEMOBJNT)pMemNt->Core.uRel.Child.pParent;
183	Assert(pMemNtParent);
184	if (pMemNtParent->cMdls)
185	{
186	Assert(pMemNtParent->cMdls == 1 && pMemNtParent->apMdls[0]);
187	Assert( pMemNt->Core.u.Mapping.R0Process == NIL_RTR0PROCESS
188	\|\| pMemNt->Core.u.Mapping.R0Process == RTR0ProcHandleSelf());
189	MmUnmapLockedPages(pMemNt->Core.pv, pMemNtParent->apMdls[0]);
190	}
191	else
192	{
193	Assert( pMemNtParent->Core.enmType == RTR0MEMOBJTYPE_PHYS
194	&& !pMemNtParent->Core.u.Phys.fAllocated);
195	Assert(pMemNt->Core.u.Mapping.R0Process == NIL_RTR0PROCESS);
196	MmUnmapIoSpace(pMemNt->Core.pv, pMemNt->Core.cb);
197	}
198	pMemNt->Core.pv = NULL;
199	break;
200	}
201
202	default:
203	AssertMsgFailed(("enmType=%d\n", pMemNt->Core.enmType));
204	return VERR_INTERNAL_ERROR;
205	}
206
207	return VINF_SUCCESS;
208	}
209
210
211	int rtR0MemObjNativeAllocPage(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
212	{
213	AssertMsgReturn(cb <= _1G, ("%#x\n", cb), VERR_OUT_OF_RANGE); /* for safe size_t -> ULONG */
214
215	/*
216	* Try allocate the memory and create an MDL for them so
217	* we can query the physical addresses and do mappings later
218	* without running into out-of-memory conditions and similar problems.
219	*/
220	int rc = VERR_NO_PAGE_MEMORY;
221	void *pv = ExAllocatePoolWithTag(NonPagedPool, cb, IPRT_NT_POOL_TAG);
222	if (pv)
223	{
224	PMDL pMdl = IoAllocateMdl(pv, (ULONG)cb, FALSE, FALSE, NULL);
225	if (pMdl)
226	{
227	MmBuildMdlForNonPagedPool(pMdl);
228	#ifdef RT_ARCH_AMD64
229	MmProtectMdlSystemAddress(pMdl, PAGE_EXECUTE_READWRITE);
230	#endif
231
232	/*
233	* Create the IPRT memory object.
234	*/
235	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_PAGE, pv, cb);
236	if (pMemNt)
237	{
238	pMemNt->cMdls = 1;
239	pMemNt->apMdls[0] = pMdl;
240	*ppMem = &pMemNt->Core;
241	return VINF_SUCCESS;
242	}
243
244	rc = VERR_NO_MEMORY;
245	IoFreeMdl(pMdl);
246	}
247	ExFreePool(pv);
248	}
249	return rc;
250	}
251
252
253	int rtR0MemObjNativeAllocLow(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
254	{
255	AssertMsgReturn(cb <= _1G, ("%#x\n", cb), VERR_OUT_OF_RANGE); /* for safe size_t -> ULONG */
256
257	/*
258	* Try see if we get lucky first...
259	* (We could probably just assume we're lucky on NT4.)
260	*/
261	int rc = rtR0MemObjNativeAllocPage(ppMem, cb, fExecutable);
262	if (RT_SUCCESS(rc))
263	{
264	size_t iPage = cb >> PAGE_SHIFT;
265	while (iPage-- > 0)
266	if (rtR0MemObjNativeGetPagePhysAddr(*ppMem, iPage) >= _4G)
267	{
268	rc = VERR_NO_MEMORY;
269	break;
270	}
271	if (RT_SUCCESS(rc))
272	return rc;
273
274	/* The following ASSUMES that rtR0MemObjNativeAllocPage returns a completed object. */
275	RTR0MemObjFree(*ppMem, false);
276	*ppMem = NULL;
277	}
278
279	#ifndef IPRT_TARGET_NT4
280	/*
281	* Use MmAllocatePagesForMdl to specify the range of physical addresses we wish to use.
282	*/
283	PHYSICAL_ADDRESS Zero;
284	Zero.QuadPart = 0;
285	PHYSICAL_ADDRESS HighAddr;
286	HighAddr.QuadPart = _4G - 1;
287	PMDL pMdl = MmAllocatePagesForMdl(Zero, HighAddr, Zero, cb);
288	if (pMdl)
289	{
290	if (MmGetMdlByteCount(pMdl) >= cb)
291	{
292	__try
293	{
294	void pv = MmMapLockedPagesSpecifyCache(pMdl, KernelMode, MmCached, NULL / no base address */,
295	FALSE /* no bug check on failure */, NormalPagePriority);
296	if (pv)
297	{
298	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_LOW, pv, cb);
299	if (pMemNt)
300	{
301	pMemNt->fAllocatedPagesForMdl = true;
302	pMemNt->cMdls = 1;
303	pMemNt->apMdls[0] = pMdl;
304	*ppMem = &pMemNt->Core;
305	return VINF_SUCCESS;
306	}
307	MmUnmapLockedPages(pv, pMdl);
308	}
309	}
310	__except(EXCEPTION_EXECUTE_HANDLER)
311	{
312	NTSTATUS rcNt = GetExceptionCode();
313	Log(("rtR0MemObjNativeAllocLow: Exception Code %#x\n", rcNt));
314	/* nothing */
315	}
316	}
317	MmFreePagesFromMdl(pMdl);
318	ExFreePool(pMdl);
319	}
320	#endif /* !IPRT_TARGET_NT4 */
321
322	/*
323	* Fall back on contiguous memory...
324	*/
325	return rtR0MemObjNativeAllocCont(ppMem, cb, fExecutable);
326	}
327
328
329	/**
330	* Internal worker for rtR0MemObjNativeAllocCont(), rtR0MemObjNativeAllocPhys()
331	* and rtR0MemObjNativeAllocPhysNC() that takes a max physical address in addition
332	* to what rtR0MemObjNativeAllocCont() does.
333	*
334	* @returns IPRT status code.
335	* @param ppMem Where to store the pointer to the ring-0 memory object.
336	* @param cb The size.
337	* @param fExecutable Whether the mapping should be executable or not.
338	* @param PhysHighest The highest physical address for the pages in allocation.
339	*/
340	static int rtR0MemObjNativeAllocContEx(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable, RTHCPHYS PhysHighest)
341	{
342	AssertMsgReturn(cb <= _1G, ("%#x\n", cb), VERR_OUT_OF_RANGE); /* for safe size_t -> ULONG */
343
344	/*
345	* Allocate the memory and create an MDL for it.
346	*/
347	PHYSICAL_ADDRESS PhysAddrHighest;
348	PhysAddrHighest.QuadPart = PhysHighest;
349	void *pv = MmAllocateContiguousMemory(cb, PhysAddrHighest);
350	if (!pv)
351	return VERR_NO_MEMORY;
352
353	PMDL pMdl = IoAllocateMdl(pv, (ULONG)cb, FALSE, FALSE, NULL);
354	if (pMdl)
355	{
356	MmBuildMdlForNonPagedPool(pMdl);
357	#ifdef RT_ARCH_AMD64
358	MmProtectMdlSystemAddress(pMdl, PAGE_EXECUTE_READWRITE);
359	#endif
360
361	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_CONT, pv, cb);
362	if (pMemNt)
363	{
364	pMemNt->Core.u.Cont.Phys = (RTHCPHYS)*MmGetMdlPfnArray(pMdl) << PAGE_SHIFT;
365	pMemNt->cMdls = 1;
366	pMemNt->apMdls[0] = pMdl;
367	*ppMem = &pMemNt->Core;
368	return VINF_SUCCESS;
369	}
370
371	IoFreeMdl(pMdl);
372	}
373	MmFreeContiguousMemory(pv);
374	return VERR_NO_MEMORY;
375	}
376
377
378	int rtR0MemObjNativeAllocCont(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
379	{
380	return rtR0MemObjNativeAllocContEx(ppMem, cb, fExecutable, _4G-1);
381	}
382
383
384	int rtR0MemObjNativeAllocPhys(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest)
385	{
386	#ifndef IPRT_TARGET_NT4
387	/*
388	* Try and see if we're lucky and get a contiguous chunk from MmAllocatePagesForMdl.
389	*
390	* This is preferable to using MmAllocateContiguousMemory because there are
391	* a few situations where the memory shouldn't be mapped, like for instance
392	* VT-x control memory. Since these are rather small allocations (one or
393	* two pages) MmAllocatePagesForMdl will probably be able to satisfy the
394	* request.
395	*
396	* If the allocation is big, the chances are probably not very good. The
397	* current limit is kind of random...
398	*/
399	if (cb < _128K)
400	{
401	PHYSICAL_ADDRESS Zero;
402	Zero.QuadPart = 0;
403	PHYSICAL_ADDRESS HighAddr;
404	HighAddr.QuadPart = PhysHighest == NIL_RTHCPHYS ? MAXLONGLONG : PhysHighest;
405	PMDL pMdl = MmAllocatePagesForMdl(Zero, HighAddr, Zero, cb);
406	if (pMdl)
407	{
408	if (MmGetMdlByteCount(pMdl) >= cb)
409	{
410	PPFN_NUMBER paPfns = MmGetMdlPfnArray(pMdl);
411	PFN_NUMBER Pfn = paPfns[0] + 1;
412	const size_t cPages = cb >> PAGE_SHIFT;
413	size_t iPage;
414	for (iPage = 1; iPage < cPages; iPage++, Pfn++)
415	if (paPfns[iPage] != Pfn)
416	break;
417	if (iPage >= cPages)
418	{
419	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_PHYS, NULL, cb);
420	if (pMemNt)
421	{
422	pMemNt->Core.u.Phys.fAllocated = true;
423	pMemNt->Core.u.Phys.PhysBase = (RTHCPHYS)paPfns[0] << PAGE_SHIFT;
424	pMemNt->fAllocatedPagesForMdl = true;
425	pMemNt->cMdls = 1;
426	pMemNt->apMdls[0] = pMdl;
427	*ppMem = &pMemNt->Core;
428	return VINF_SUCCESS;
429	}
430	}
431	}
432	MmFreePagesFromMdl(pMdl);
433	ExFreePool(pMdl);
434	}
435	}
436	#endif /* !IPRT_TARGET_NT4 */
437
438	return rtR0MemObjNativeAllocContEx(ppMem, cb, false, PhysHighest);
439	}
440
441
442	int rtR0MemObjNativeAllocPhysNC(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest)
443	{
444	#ifndef IPRT_TARGET_NT4
445	PHYSICAL_ADDRESS Zero;
446	Zero.QuadPart = 0;
447	PHYSICAL_ADDRESS HighAddr;
448	HighAddr.QuadPart = PhysHighest == NIL_RTHCPHYS ? MAXLONGLONG : PhysHighest;
449	PMDL pMdl = MmAllocatePagesForMdl(Zero, HighAddr, Zero, cb);
450	if (pMdl)
451	{
452	if (MmGetMdlByteCount(pMdl) >= cb)
453	{
454	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_PHYS_NC, NULL, cb);
455	if (pMemNt)
456	{
457	pMemNt->fAllocatedPagesForMdl = true;
458	pMemNt->cMdls = 1;
459	pMemNt->apMdls[0] = pMdl;
460	*ppMem = &pMemNt->Core;
461	return VINF_SUCCESS;
462	}
463	}
464	MmFreePagesFromMdl(pMdl);
465	ExFreePool(pMdl);
466	}
467	return VERR_NO_MEMORY;
468	#else /* IPRT_TARGET_NT4 */
469	return VERR_NOT_SUPPORTED;
470	#endif /* IPRT_TARGET_NT4 */
471	}
472
473
474	int rtR0MemObjNativeEnterPhys(PPRTR0MEMOBJINTERNAL ppMem, RTHCPHYS Phys, size_t cb)
475	{
476	/*
477	* Validate the address range and create a descriptor for it.
478	*/
479	PFN_NUMBER Pfn = (PFN_NUMBER)(Phys >> PAGE_SHIFT);
480	if (((RTHCPHYS)Pfn << PAGE_SHIFT) != Phys)
481	return VERR_ADDRESS_TOO_BIG;
482
483	/*
484	* Create the IPRT memory object.
485	*/
486	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_PHYS, NULL, cb);
487	if (pMemNt)
488	{
489	pMemNt->Core.u.Phys.PhysBase = Phys;
490	pMemNt->Core.u.Phys.fAllocated = false;
491	*ppMem = &pMemNt->Core;
492	return VINF_SUCCESS;
493	}
494	return VERR_NO_MEMORY;
495	}
496
497
498	/**
499	* Internal worker for locking down pages.
500	*
501	* @return IPRT status code.
502	*
503	* @param ppMem Where to store the memory object pointer.
504	* @param pv First page.
505	* @param cb Number of bytes.
506	* @param fAccess The desired access, a combination of RTMEM_PROT_READ
507	* and RTMEM_PROT_WRITE.
508	* @param R0Process The process \a pv and \a cb refers to.
509	*/
510	static int rtR0MemObjNtLock(PPRTR0MEMOBJINTERNAL ppMem, void *pv, size_t cb, uint32_t fAccess, RTR0PROCESS R0Process)
511	{
512	/*
513	* Calc the number of MDLs we need and allocate the memory object structure.
514	*/
515	size_t cMdls = cb / MAX_LOCK_MEM_SIZE;
516	if (cb % MAX_LOCK_MEM_SIZE)
517	cMdls++;
518	if (cMdls >= UINT32_MAX)
519	return VERR_OUT_OF_RANGE;
520	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJNT, apMdls[cMdls]),
521	RTR0MEMOBJTYPE_LOCK, pv, cb);
522	if (!pMemNt)
523	return VERR_NO_MEMORY;
524
525	/*
526	* Loop locking down the sub parts of the memory.
527	*/
528	int rc = VINF_SUCCESS;
529	size_t cbTotal = 0;
530	uint8_t pb = (uint8_t )pv;
531	uint32_t iMdl;
532	for (iMdl = 0; iMdl < cMdls; iMdl++)
533	{
534	/*
535	* Calc the Mdl size and allocate it.
536	*/
537	size_t cbCur = cb - cbTotal;
538	if (cbCur > MAX_LOCK_MEM_SIZE)
539	cbCur = MAX_LOCK_MEM_SIZE;
540	AssertMsg(cbCur, ("cbCur: 0!\n"));
541	PMDL pMdl = IoAllocateMdl(pb, (ULONG)cbCur, FALSE, FALSE, NULL);
542	if (!pMdl)
543	{
544	rc = VERR_NO_MEMORY;
545	break;
546	}
547
548	/*
549	* Lock the pages.
550	*/
551	__try
552	{
553	MmProbeAndLockPages(pMdl,
554	R0Process == NIL_RTR0PROCESS ? KernelMode : UserMode,
555	fAccess == RTMEM_PROT_READ
556	? IoReadAccess
557	: fAccess == RTMEM_PROT_WRITE
558	? IoWriteAccess
559	: IoModifyAccess);
560
561	pMemNt->apMdls[iMdl] = pMdl;
562	pMemNt->cMdls++;
563	}
564	__except(EXCEPTION_EXECUTE_HANDLER)
565	{
566	IoFreeMdl(pMdl);
567	rc = VERR_LOCK_FAILED;
568	break;
569	}
570
571	if (R0Process != NIL_RTR0PROCESS)
572	{
573	/* Make sure the user process can't change the allocation. */
574	pMemNt->pvSecureMem = MmSecureVirtualMemory(pv, cb,
575	fAccess & RTMEM_PROT_WRITE
576	? PAGE_READWRITE
577	: PAGE_READONLY);
578	if (!pMemNt->pvSecureMem)
579	{
580	rc = VERR_NO_MEMORY;
581	break;
582	}
583	}
584
585	/* next */
586	cbTotal += cbCur;
587	pb += cbCur;
588	}
589	if (RT_SUCCESS(rc))
590	{
591	Assert(pMemNt->cMdls == cMdls);
592	pMemNt->Core.u.Lock.R0Process = R0Process;
593	*ppMem = &pMemNt->Core;
594	return rc;
595	}
596
597	/*
598	* We failed, perform cleanups.
599	*/
600	while (iMdl-- > 0)
601	{
602	MmUnlockPages(pMemNt->apMdls[iMdl]);
603	IoFreeMdl(pMemNt->apMdls[iMdl]);
604	pMemNt->apMdls[iMdl] = NULL;
605	}
606	if (pMemNt->pvSecureMem)
607	{
608	MmUnsecureVirtualMemory(pMemNt->pvSecureMem);
609	pMemNt->pvSecureMem = NULL;
610	}
611
612	rtR0MemObjDelete(&pMemNt->Core);
613	return rc;
614	}
615
616
617	int rtR0MemObjNativeLockUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3Ptr, size_t cb, uint32_t fAccess, RTR0PROCESS R0Process)
618	{
619	AssertMsgReturn(R0Process == RTR0ProcHandleSelf(), ("%p != %p\n", R0Process, RTR0ProcHandleSelf()), VERR_NOT_SUPPORTED);
620	/* (Can use MmProbeAndLockProcessPages if we need to mess with other processes later.) */
621	return rtR0MemObjNtLock(ppMem, (void *)R3Ptr, cb, fAccess, R0Process);
622	}
623
624
625	int rtR0MemObjNativeLockKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pv, size_t cb, uint32_t fAccess)
626	{
627	return rtR0MemObjNtLock(ppMem, pv, cb, fAccess, NIL_RTR0PROCESS);
628	}
629
630
631	int rtR0MemObjNativeReserveKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pvFixed, size_t cb, size_t uAlignment)
632	{
633	/*
634	* MmCreateSection(SEC_RESERVE) + MmMapViewInSystemSpace perhaps?
635	*/
636	return VERR_NOT_IMPLEMENTED;
637	}
638
639
640	int rtR0MemObjNativeReserveUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3PtrFixed, size_t cb, size_t uAlignment, RTR0PROCESS R0Process)
641	{
642	/*
643	* ZeCreateSection(SEC_RESERVE) + ZwMapViewOfSection perhaps?
644	*/
645	return VERR_NOT_IMPLEMENTED;
646	}
647
648
649	/**
650	* Internal worker for rtR0MemObjNativeMapKernel and rtR0MemObjNativeMapUser.
651	*
652	* @returns IPRT status code.
653	* @param ppMem Where to store the memory object for the mapping.
654	* @param pMemToMap The memory object to map.
655	* @param pvFixed Where to map it. (void *)-1 if anywhere is fine.
656	* @param uAlignment The alignment requirement for the mapping.
657	* @param fProt The desired page protection for the mapping.
658	* @param R0Process If NIL_RTR0PROCESS map into system (kernel) memory.
659	* If not nil, it's the current process.
660	*/
661	static int rtR0MemObjNtMap(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, void *pvFixed, size_t uAlignment,
662	unsigned fProt, RTR0PROCESS R0Process)
663	{
664	int rc = VERR_MAP_FAILED;
665
666	/*
667	* Check that the specified alignment is supported.
668	*/
669	if (uAlignment > PAGE_SIZE)
670	return VERR_NOT_SUPPORTED;
671
672	/*
673	* There are two basic cases here, either we've got an MDL and can
674	* map it using MmMapLockedPages, or we've got a contiguous physical
675	* range (MMIO most likely) and can use MmMapIoSpace.
676	*/
677	PRTR0MEMOBJNT pMemNtToMap = (PRTR0MEMOBJNT)pMemToMap;
678	if (pMemNtToMap->cMdls)
679	{
680	/* don't attempt map locked regions with more than one mdl. */
681	if (pMemNtToMap->cMdls != 1)
682	return VERR_NOT_SUPPORTED;
683
684	#ifdef IPRT_TARGET_NT4
685	/* NT SP0 can't map to a specific address. */
686	if (pvFixed != (void *)-1)
687	return VERR_NOT_SUPPORTED;
688	#endif
689
690	/* we can't map anything to the first page, sorry. */
691	if (pvFixed == 0)
692	return VERR_NOT_SUPPORTED;
693
694	/* only one system mapping for now - no time to figure out MDL restrictions right now. */
695	if ( pMemNtToMap->Core.uRel.Parent.cMappings
696	&& R0Process == NIL_RTR0PROCESS)
697	return VERR_NOT_SUPPORTED;
698
699	__try
700	{
701	/** @todo uAlignment */
702	/** @todo How to set the protection on the pages? */
703	#ifdef IPRT_TARGET_NT4
704	void *pv = MmMapLockedPages(pMemNtToMap->apMdls[0],
705	R0Process == NIL_RTR0PROCESS ? KernelMode : UserMode);
706	#else
707	void *pv = MmMapLockedPagesSpecifyCache(pMemNtToMap->apMdls[0],
708	R0Process == NIL_RTR0PROCESS ? KernelMode : UserMode,
709	MmCached,
710	pvFixed != (void *)-1 ? pvFixed : NULL,
711	FALSE /* no bug check on failure */,
712	NormalPagePriority);
713	#endif
714	if (pv)
715	{
716	NOREF(fProt);
717
718	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_MAPPING, pv,
719	pMemNtToMap->Core.cb);
720	if (pMemNt)
721	{
722	pMemNt->Core.u.Mapping.R0Process = R0Process;
723	*ppMem = &pMemNt->Core;
724	return VINF_SUCCESS;
725	}
726
727	rc = VERR_NO_MEMORY;
728	MmUnmapLockedPages(pv, pMemNtToMap->apMdls[0]);
729	}
730	}
731	__except(EXCEPTION_EXECUTE_HANDLER)
732	{
733	NTSTATUS rcNt = GetExceptionCode();
734	Log(("rtR0MemObjNtMap: Exception Code %#x\n", rcNt));
735
736	/* nothing */
737	rc = VERR_MAP_FAILED;
738	}
739
740	}
741	else
742	{
743	AssertReturn( pMemNtToMap->Core.enmType == RTR0MEMOBJTYPE_PHYS
744	&& !pMemNtToMap->Core.u.Phys.fAllocated, VERR_INTERNAL_ERROR);
745
746	/* cannot map phys mem to user space (yet). */
747	if (R0Process != NIL_RTR0PROCESS)
748	return VERR_NOT_SUPPORTED;
749
750	/** @todo uAlignment */
751	/** @todo How to set the protection on the pages? */
752	PHYSICAL_ADDRESS Phys;
753	Phys.QuadPart = pMemNtToMap->Core.u.Phys.PhysBase;
754	void pv = MmMapIoSpace(Phys, pMemNtToMap->Core.cb, MmCached); /* @todo add cache type to fProt. */
755	if (pv)
756	{
757	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)rtR0MemObjNew(sizeof(*pMemNt), RTR0MEMOBJTYPE_MAPPING, pv,
758	pMemNtToMap->Core.cb);
759	if (pMemNt)
760	{
761	pMemNt->Core.u.Mapping.R0Process = R0Process;
762	*ppMem = &pMemNt->Core;
763	return VINF_SUCCESS;
764	}
765
766	rc = VERR_NO_MEMORY;
767	MmUnmapIoSpace(pv, pMemNtToMap->Core.cb);
768	}
769	}
770
771	NOREF(uAlignment); NOREF(fProt);
772	return rc;
773	}
774
775
776	int rtR0MemObjNativeMapKernel(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, void *pvFixed, size_t uAlignment,
777	unsigned fProt, size_t offSub, size_t cbSub)
778	{
779	AssertMsgReturn(!offSub && !cbSub, ("%#x %#x\n", offSub, cbSub), VERR_NOT_SUPPORTED);
780	return rtR0MemObjNtMap(ppMem, pMemToMap, pvFixed, uAlignment, fProt, NIL_RTR0PROCESS);
781	}
782
783
784	int rtR0MemObjNativeMapUser(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, RTR3PTR R3PtrFixed, size_t uAlignment, unsigned fProt, RTR0PROCESS R0Process)
785	{
786	AssertReturn(R0Process == RTR0ProcHandleSelf(), VERR_NOT_SUPPORTED);
787	return rtR0MemObjNtMap(ppMem, pMemToMap, (void *)R3PtrFixed, uAlignment, fProt, R0Process);
788	}
789
790
791	int rtR0MemObjNativeProtect(PRTR0MEMOBJINTERNAL pMem, size_t offSub, size_t cbSub, uint32_t fProt)
792	{
793	NOREF(pMem);
794	NOREF(offSub);
795	NOREF(cbSub);
796	NOREF(fProt);
797	return VERR_NOT_SUPPORTED;
798	}
799
800
801	RTHCPHYS rtR0MemObjNativeGetPagePhysAddr(PRTR0MEMOBJINTERNAL pMem, size_t iPage)
802	{
803	PRTR0MEMOBJNT pMemNt = (PRTR0MEMOBJNT)pMem;
804
805	if (pMemNt->cMdls)
806	{
807	if (pMemNt->cMdls == 1)
808	{
809	PPFN_NUMBER paPfns = MmGetMdlPfnArray(pMemNt->apMdls[0]);
810	return (RTHCPHYS)paPfns[iPage] << PAGE_SHIFT;
811	}
812
813	size_t iMdl = iPage / (MAX_LOCK_MEM_SIZE >> PAGE_SHIFT);
814	size_t iMdlPfn = iPage % (MAX_LOCK_MEM_SIZE >> PAGE_SHIFT);
815	PPFN_NUMBER paPfns = MmGetMdlPfnArray(pMemNt->apMdls[iMdl]);
816	return (RTHCPHYS)paPfns[iMdlPfn] << PAGE_SHIFT;
817	}
818
819	switch (pMemNt->Core.enmType)
820	{
821	case RTR0MEMOBJTYPE_MAPPING:
822	return rtR0MemObjNativeGetPagePhysAddr(pMemNt->Core.uRel.Child.pParent, iPage);
823
824	case RTR0MEMOBJTYPE_PHYS:
825	return pMemNt->Core.u.Phys.PhysBase + (iPage << PAGE_SHIFT);
826
827	case RTR0MEMOBJTYPE_PAGE:
828	case RTR0MEMOBJTYPE_PHYS_NC:
829	case RTR0MEMOBJTYPE_LOW:
830	case RTR0MEMOBJTYPE_CONT:
831	case RTR0MEMOBJTYPE_LOCK:
832	default:
833	AssertMsgFailed(("%d\n", pMemNt->Core.enmType));
834	case RTR0MEMOBJTYPE_RES_VIRT:
835	return NIL_RTHCPHYS;
836	}
837	}
838

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source: vbox/trunk/src/VBox/Runtime/r0drv/nt/memobj-r0drv-nt.cpp@ 25720

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