memobj-r0drv.cpp@ 92247

Last change on this file since 92247 was 92247, checked in by vboxsync, 3 years ago
IPRT/RTR0MemObj: Added RTR0MemObjWasZeroInitialized and a couple of flags with which the backend can feed it the necessary info. It would be good to try avoid zeroing memory twice when we can. bugref:10093
Property svn:eol-style set to `native` Property svn:keywords set to `Id Rev Revision`
File size: 33.8 KB

Line
1	/* $Id: memobj-r0drv.cpp 92247 2021-11-06 03:40:52Z vboxsync $ */
2	/** @file
3	* IPRT - Ring-0 Memory Objects, Common Code.
4	*/
5
6	/*
7	* Copyright (C) 2006-2020 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	* 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
27
28	/*********************************************************************************************************************************
29	* Header Files *
30	*********************************************************************************************************************************/
31	#define LOG_GROUP RTLOGGROUP_DEFAULT /// @todo RTLOGGROUP_MEM
32	#define RTMEM_NO_WRAP_TO_EF_APIS /* circular dependency otherwise. */
33	#include <iprt/memobj.h>
34	#include "internal/iprt.h"
35
36	#include <iprt/alloc.h>
37	#include <iprt/asm.h>
38	#include <iprt/assert.h>
39	#include <iprt/err.h>
40	#include <iprt/log.h>
41	#include <iprt/mp.h>
42	#include <iprt/param.h>
43	#include <iprt/process.h>
44	#include <iprt/thread.h>
45
46	#include "internal/memobj.h"
47
48
49	/**
50	* Internal function for allocating a new memory object.
51	*
52	* @returns The allocated and initialized handle.
53	* @param cbSelf The size of the memory object handle. 0 mean default size.
54	* @param enmType The memory object type.
55	* @param pv The memory object mapping.
56	* @param cb The size of the memory object.
57	* @param pszTag The tag string.
58	*/
59	DECLHIDDEN(PRTR0MEMOBJINTERNAL) rtR0MemObjNew(size_t cbSelf, RTR0MEMOBJTYPE enmType, void pv, size_t cb, const char pszTag)
60	{
61	PRTR0MEMOBJINTERNAL pNew;
62
63	/* validate the size */
64	if (!cbSelf)
65	cbSelf = sizeof(*pNew);
66	Assert(cbSelf >= sizeof(*pNew));
67	Assert(cbSelf == (uint32_t)cbSelf);
68	AssertMsg(RT_ALIGN_Z(cb, PAGE_SIZE) == cb, ("%#zx\n", cb));
69
70	/*
71	* Allocate and initialize the object.
72	*/
73	pNew = (PRTR0MEMOBJINTERNAL)RTMemAllocZ(cbSelf);
74	if (pNew)
75	{
76	pNew->u32Magic = RTR0MEMOBJ_MAGIC;
77	pNew->cbSelf = (uint32_t)cbSelf;
78	pNew->enmType = enmType;
79	pNew->fFlags = 0;
80	pNew->cb = cb;
81	pNew->pv = pv;
82	#ifdef DEBUG
83	pNew->pszTag = pszTag;
84	#else
85	RT_NOREF_PV(pszTag);
86	#endif
87	}
88	return pNew;
89	}
90
91
92	/**
93	* Deletes an incomplete memory object.
94	*
95	* This is for cleaning up after failures during object creation.
96	*
97	* @param pMem The incomplete memory object to delete.
98	*/
99	DECLHIDDEN(void) rtR0MemObjDelete(PRTR0MEMOBJINTERNAL pMem)
100	{
101	if (pMem)
102	{
103	ASMAtomicUoWriteU32(&pMem->u32Magic, ~RTR0MEMOBJ_MAGIC);
104	pMem->enmType = RTR0MEMOBJTYPE_END;
105	RTMemFree(pMem);
106	}
107	}
108
109
110	/**
111	* Links a mapping object to a primary object.
112	*
113	* @returns IPRT status code.
114	* @retval VINF_SUCCESS on success.
115	* @retval VINF_NO_MEMORY if we couldn't expand the mapping array of the parent.
116	* @param pParent The parent (primary) memory object.
117	* @param pChild The child (mapping) memory object.
118	*/
119	static int rtR0MemObjLink(PRTR0MEMOBJINTERNAL pParent, PRTR0MEMOBJINTERNAL pChild)
120	{
121	uint32_t i;
122
123	/* sanity */
124	Assert(rtR0MemObjIsMapping(pChild));
125	Assert(!rtR0MemObjIsMapping(pParent));
126
127	/* expand the array? */
128	i = pParent->uRel.Parent.cMappings;
129	if (i >= pParent->uRel.Parent.cMappingsAllocated)
130	{
131	void *pv = RTMemRealloc(pParent->uRel.Parent.papMappings,
132	(i + 32) * sizeof(pParent->uRel.Parent.papMappings[0]));
133	if (!pv)
134	return VERR_NO_MEMORY;
135	pParent->uRel.Parent.papMappings = (PPRTR0MEMOBJINTERNAL)pv;
136	pParent->uRel.Parent.cMappingsAllocated = i + 32;
137	Assert(i == pParent->uRel.Parent.cMappings);
138	}
139
140	/* do the linking. */
141	pParent->uRel.Parent.papMappings[i] = pChild;
142	pParent->uRel.Parent.cMappings++;
143	pChild->uRel.Child.pParent = pParent;
144
145	return VINF_SUCCESS;
146	}
147
148
149	/**
150	* Checks if this is mapping or not.
151	*
152	* @returns true if it's a mapping, otherwise false.
153	* @param MemObj The ring-0 memory object handle.
154	*/
155	RTR0DECL(bool) RTR0MemObjIsMapping(RTR0MEMOBJ MemObj)
156	{
157	/* Validate the object handle. */
158	PRTR0MEMOBJINTERNAL pMem;
159	AssertPtrReturn(MemObj, false);
160	pMem = (PRTR0MEMOBJINTERNAL)MemObj;
161	AssertMsgReturn(pMem->u32Magic == RTR0MEMOBJ_MAGIC, ("%p: %#x\n", pMem, pMem->u32Magic), false);
162	AssertMsgReturn(pMem->enmType > RTR0MEMOBJTYPE_INVALID && pMem->enmType < RTR0MEMOBJTYPE_END, ("%p: %d\n", pMem, pMem->enmType), false);
163
164	/* hand it on to the inlined worker. */
165	return rtR0MemObjIsMapping(pMem);
166	}
167	RT_EXPORT_SYMBOL(RTR0MemObjIsMapping);
168
169
170	/**
171	* Gets the address of a ring-0 memory object.
172	*
173	* @returns The address of the memory object.
174	* @returns NULL if the handle is invalid (asserts in strict builds) or if there isn't any mapping.
175	* @param MemObj The ring-0 memory object handle.
176	*/
177	RTR0DECL(void *) RTR0MemObjAddress(RTR0MEMOBJ MemObj)
178	{
179	/* Validate the object handle. */
180	PRTR0MEMOBJINTERNAL pMem;
181	if (RT_UNLIKELY(MemObj == NIL_RTR0MEMOBJ))
182	return NULL;
183	AssertPtrReturn(MemObj, NULL);
184	pMem = (PRTR0MEMOBJINTERNAL)MemObj;
185	AssertMsgReturn(pMem->u32Magic == RTR0MEMOBJ_MAGIC, ("%p: %#x\n", pMem, pMem->u32Magic), NULL);
186	AssertMsgReturn(pMem->enmType > RTR0MEMOBJTYPE_INVALID && pMem->enmType < RTR0MEMOBJTYPE_END, ("%p: %d\n", pMem, pMem->enmType), NULL);
187
188	/* return the mapping address. */
189	return pMem->pv;
190	}
191	RT_EXPORT_SYMBOL(RTR0MemObjAddress);
192
193
194	/**
195	* Gets the ring-3 address of a ring-0 memory object.
196	*
197	* This only applies to ring-0 memory object with ring-3 mappings of some kind, i.e.
198	* locked user memory, reserved user address space and user mappings. This API should
199	* not be used on any other objects.
200	*
201	* @returns The address of the memory object.
202	* @returns NIL_RTR3PTR if the handle is invalid or if it's not an object with a ring-3 mapping.
203	* Strict builds will assert in both cases.
204	* @param MemObj The ring-0 memory object handle.
205	*/
206	RTR0DECL(RTR3PTR) RTR0MemObjAddressR3(RTR0MEMOBJ MemObj)
207	{
208	PRTR0MEMOBJINTERNAL pMem;
209
210	/* Validate the object handle. */
211	if (RT_UNLIKELY(MemObj == NIL_RTR0MEMOBJ))
212	return NIL_RTR3PTR;
213	AssertPtrReturn(MemObj, NIL_RTR3PTR);
214	pMem = (PRTR0MEMOBJINTERNAL)MemObj;
215	AssertMsgReturn(pMem->u32Magic == RTR0MEMOBJ_MAGIC, ("%p: %#x\n", pMem, pMem->u32Magic), NIL_RTR3PTR);
216	AssertMsgReturn(pMem->enmType > RTR0MEMOBJTYPE_INVALID && pMem->enmType < RTR0MEMOBJTYPE_END, ("%p: %d\n", pMem, pMem->enmType), NIL_RTR3PTR);
217	if (RT_UNLIKELY( ( pMem->enmType != RTR0MEMOBJTYPE_MAPPING
218	\|\| pMem->u.Mapping.R0Process == NIL_RTR0PROCESS)
219	&& ( pMem->enmType != RTR0MEMOBJTYPE_LOCK
220	\|\| pMem->u.Lock.R0Process == NIL_RTR0PROCESS)
221	&& ( pMem->enmType != RTR0MEMOBJTYPE_PHYS_NC
222	\|\| pMem->u.Lock.R0Process == NIL_RTR0PROCESS)
223	&& ( pMem->enmType != RTR0MEMOBJTYPE_RES_VIRT
224	\|\| pMem->u.ResVirt.R0Process == NIL_RTR0PROCESS)))
225	return NIL_RTR3PTR;
226
227	/* return the mapping address. */
228	return (RTR3PTR)pMem->pv;
229	}
230	RT_EXPORT_SYMBOL(RTR0MemObjAddressR3);
231
232
233	/**
234	* Gets the size of a ring-0 memory object.
235	*
236	* The returned value may differ from the one specified to the API creating the
237	* object because of alignment adjustments. The minimal alignment currently
238	* employed by any API is PAGE_SIZE, so the result can safely be shifted by
239	* PAGE_SHIFT to calculate a page count.
240	*
241	* @returns The object size.
242	* @returns 0 if the handle is invalid (asserts in strict builds) or if there isn't any mapping.
243	* @param MemObj The ring-0 memory object handle.
244	*/
245	RTR0DECL(size_t) RTR0MemObjSize(RTR0MEMOBJ MemObj)
246	{
247	PRTR0MEMOBJINTERNAL pMem;
248
249	/* Validate the object handle. */
250	if (RT_UNLIKELY(MemObj == NIL_RTR0MEMOBJ))
251	return 0;
252	AssertPtrReturn(MemObj, 0);
253	pMem = (PRTR0MEMOBJINTERNAL)MemObj;
254	AssertMsgReturn(pMem->u32Magic == RTR0MEMOBJ_MAGIC, ("%p: %#x\n", pMem, pMem->u32Magic), 0);
255	AssertMsgReturn(pMem->enmType > RTR0MEMOBJTYPE_INVALID && pMem->enmType < RTR0MEMOBJTYPE_END, ("%p: %d\n", pMem, pMem->enmType), 0);
256	AssertMsg(RT_ALIGN_Z(pMem->cb, PAGE_SIZE) == pMem->cb, ("%#zx\n", pMem->cb));
257
258	/* return the size. */
259	return pMem->cb;
260	}
261	RT_EXPORT_SYMBOL(RTR0MemObjSize);
262
263
264	/**
265	* Get the physical address of an page in the memory object.
266	*
267	* @returns The physical address.
268	* @returns NIL_RTHCPHYS if the object doesn't contain fixed physical pages.
269	* @returns NIL_RTHCPHYS if the iPage is out of range.
270	* @returns NIL_RTHCPHYS if the object handle isn't valid.
271	* @param MemObj The ring-0 memory object handle.
272	* @param iPage The page number within the object.
273	*/
274	/* Work around gcc bug 55940 */
275	#if defined(__GNUC__) && defined(RT_ARCH_X86) && (__GNUC__ * 100 + __GNUC_MINOR__) == 407
276	__attribute__((__optimize__ ("no-shrink-wrap")))
277	#endif
278	RTR0DECL(RTHCPHYS) RTR0MemObjGetPagePhysAddr(RTR0MEMOBJ MemObj, size_t iPage)
279	{
280	/* Validate the object handle. */
281	PRTR0MEMOBJINTERNAL pMem;
282	size_t cPages;
283	AssertPtrReturn(MemObj, NIL_RTHCPHYS);
284	pMem = (PRTR0MEMOBJINTERNAL)MemObj;
285	AssertReturn(pMem->u32Magic == RTR0MEMOBJ_MAGIC, NIL_RTHCPHYS);
286	AssertReturn(pMem->enmType > RTR0MEMOBJTYPE_INVALID && pMem->enmType < RTR0MEMOBJTYPE_END, NIL_RTHCPHYS);
287	AssertMsgReturn(pMem->u32Magic == RTR0MEMOBJ_MAGIC, ("%p: %#x\n", pMem, pMem->u32Magic), NIL_RTHCPHYS);
288	AssertMsgReturn(pMem->enmType > RTR0MEMOBJTYPE_INVALID && pMem->enmType < RTR0MEMOBJTYPE_END, ("%p: %d\n", pMem, pMem->enmType), NIL_RTHCPHYS);
289	cPages = (pMem->cb >> PAGE_SHIFT);
290	if (iPage >= cPages)
291	{
292	/* permit: while (RTR0MemObjGetPagePhysAddr(pMem, iPage++) != NIL_RTHCPHYS) {} */
293	if (iPage == cPages)
294	return NIL_RTHCPHYS;
295	AssertReturn(iPage < (pMem->cb >> PAGE_SHIFT), NIL_RTHCPHYS);
296	}
297
298	/*
299	* We know the address of physically contiguous allocations and mappings.
300	*/
301	if (pMem->enmType == RTR0MEMOBJTYPE_CONT)
302	return pMem->u.Cont.Phys + iPage * PAGE_SIZE;
303	if (pMem->enmType == RTR0MEMOBJTYPE_PHYS)
304	return pMem->u.Phys.PhysBase + iPage * PAGE_SIZE;
305
306	/*
307	* Do the job.
308	*/
309	return rtR0MemObjNativeGetPagePhysAddr(pMem, iPage);
310	}
311	RT_EXPORT_SYMBOL(RTR0MemObjGetPagePhysAddr);
312
313
314	/**
315	* Checks whether the allocation was zero initialized or not.
316	*
317	* This only works on allocations. It is not meaningful for mappings, reserved
318	* memory and entered physical address, and will return false for these.
319	*
320	* @returns true if the allocation was initialized to zero at allocation time,
321	* false if not or query not meaningful to the object type.
322	* @param hMemObj The ring-0 memory object to be freed.
323	*
324	* @remarks It can be expected that memory allocated in the same fashion will
325	* have the same initialization state. So, if this returns true for
326	* one allocation it will return true for all other similarly made
327	* allocations.
328	*/
329	RTR0DECL(bool) RTR0MemObjWasZeroInitialized(PRTR0MEMOBJ hMemObj)
330	{
331	PRTR0MEMOBJINTERNAL pMem;
332
333	/* Validate the object handle. */
334	if (RT_UNLIKELY(hMemObj == NIL_RTR0MEMOBJ))
335	return false;
336	AssertPtrReturn(hMemObj, false);
337	pMem = (PRTR0MEMOBJINTERNAL)hMemObj;
338	AssertMsgReturn(pMem->u32Magic == RTR0MEMOBJ_MAGIC, ("%p: %#x\n", pMem, pMem->u32Magic), false);
339	AssertMsgReturn(pMem->enmType > RTR0MEMOBJTYPE_INVALID && pMem->enmType < RTR0MEMOBJTYPE_END, ("%p: %d\n", pMem, pMem->enmType), false);
340	Assert( (pMem->fFlags & (RTR0MEMOBJ_FLAGS_ZERO_AT_ALLOC \| RTR0MEMOBJ_FLAGS_UNINITIALIZED_AT_ALLOC))
341	!= (RTR0MEMOBJ_FLAGS_ZERO_AT_ALLOC \| RTR0MEMOBJ_FLAGS_UNINITIALIZED_AT_ALLOC));
342
343	/* return the alloc init state. */
344	return (pMem->fFlags & (RTR0MEMOBJ_FLAGS_ZERO_AT_ALLOC \| RTR0MEMOBJ_FLAGS_UNINITIALIZED_AT_ALLOC))
345	== RTR0MEMOBJ_FLAGS_ZERO_AT_ALLOC;
346	}
347	RT_EXPORT_SYMBOL(RTR0MemObjWasZeroInitialized);
348
349
350	/**
351	* Frees a ring-0 memory object.
352	*
353	* @returns IPRT status code.
354	* @retval VERR_INVALID_HANDLE if
355	* @param MemObj The ring-0 memory object to be freed. NIL is
356	* accepted.
357	* @param fFreeMappings Whether or not to free mappings of the object.
358	*/
359	RTR0DECL(int) RTR0MemObjFree(RTR0MEMOBJ MemObj, bool fFreeMappings)
360	{
361	/*
362	* Validate the object handle.
363	*/
364	PRTR0MEMOBJINTERNAL pMem;
365	int rc;
366
367	if (MemObj == NIL_RTR0MEMOBJ)
368	return VINF_SUCCESS;
369	AssertPtrReturn(MemObj, VERR_INVALID_HANDLE);
370	pMem = (PRTR0MEMOBJINTERNAL)MemObj;
371	AssertReturn(pMem->u32Magic == RTR0MEMOBJ_MAGIC, VERR_INVALID_HANDLE);
372	AssertReturn(pMem->enmType > RTR0MEMOBJTYPE_INVALID && pMem->enmType < RTR0MEMOBJTYPE_END, VERR_INVALID_HANDLE);
373	RT_ASSERT_PREEMPTIBLE();
374
375	/*
376	* Deal with mappings according to fFreeMappings.
377	*/
378	if ( !rtR0MemObjIsMapping(pMem)
379	&& pMem->uRel.Parent.cMappings > 0)
380	{
381	/* fail if not requested to free mappings. */
382	if (!fFreeMappings)
383	return VERR_MEMORY_BUSY;
384
385	while (pMem->uRel.Parent.cMappings > 0)
386	{
387	PRTR0MEMOBJINTERNAL pChild = pMem->uRel.Parent.papMappings[--pMem->uRel.Parent.cMappings];
388	pMem->uRel.Parent.papMappings[pMem->uRel.Parent.cMappings] = NULL;
389
390	/* sanity checks. */
391	AssertPtr(pChild);
392	AssertFatal(pChild->u32Magic == RTR0MEMOBJ_MAGIC);
393	AssertFatal(pChild->enmType > RTR0MEMOBJTYPE_INVALID && pChild->enmType < RTR0MEMOBJTYPE_END);
394	AssertFatal(rtR0MemObjIsMapping(pChild));
395
396	/* free the mapping. */
397	rc = rtR0MemObjNativeFree(pChild);
398	if (RT_FAILURE(rc))
399	{
400	Log(("RTR0MemObjFree: failed to free mapping %p: %p %#zx; rc=%Rrc\n", pChild, pChild->pv, pChild->cb, rc));
401	pMem->uRel.Parent.papMappings[pMem->uRel.Parent.cMappings++] = pChild;
402	return rc;
403	}
404
405	pChild->u32Magic++;
406	pChild->enmType = RTR0MEMOBJTYPE_END;
407	RTMemFree(pChild);
408	}
409	}
410
411	/*
412	* Free this object.
413	*/
414	rc = rtR0MemObjNativeFree(pMem);
415	if (RT_SUCCESS(rc))
416	{
417	/*
418	* Ok, it was freed just fine. Now, if it's a mapping we'll have to remove it from the parent.
419	*/
420	if (rtR0MemObjIsMapping(pMem))
421	{
422	PRTR0MEMOBJINTERNAL pParent = pMem->uRel.Child.pParent;
423	uint32_t i;
424
425	/* sanity checks */
426	AssertPtr(pParent);
427	AssertFatal(pParent->u32Magic == RTR0MEMOBJ_MAGIC);
428	AssertFatal(pParent->enmType > RTR0MEMOBJTYPE_INVALID && pParent->enmType < RTR0MEMOBJTYPE_END);
429	AssertFatal(!rtR0MemObjIsMapping(pParent));
430	AssertFatal(pParent->uRel.Parent.cMappings > 0);
431	AssertPtr(pParent->uRel.Parent.papMappings);
432
433	/* locate and remove from the array of mappings. */
434	i = pParent->uRel.Parent.cMappings;
435	while (i-- > 0)
436	{
437	if (pParent->uRel.Parent.papMappings[i] == pMem)
438	{
439	pParent->uRel.Parent.papMappings[i] = pParent->uRel.Parent.papMappings[--pParent->uRel.Parent.cMappings];
440	break;
441	}
442	}
443	Assert(i != UINT32_MAX);
444	}
445	else
446	Assert(pMem->uRel.Parent.cMappings == 0);
447
448	/*
449	* Finally, destroy the handle.
450	*/
451	pMem->u32Magic++;
452	pMem->enmType = RTR0MEMOBJTYPE_END;
453	if (!rtR0MemObjIsMapping(pMem))
454	RTMemFree(pMem->uRel.Parent.papMappings);
455	RTMemFree(pMem);
456	}
457	else
458	Log(("RTR0MemObjFree: failed to free %p: %d %p %#zx; rc=%Rrc\n",
459	pMem, pMem->enmType, pMem->pv, pMem->cb, rc));
460	return rc;
461	}
462	RT_EXPORT_SYMBOL(RTR0MemObjFree);
463
464
465
466	RTR0DECL(int) RTR0MemObjAllocPageTag(PRTR0MEMOBJ pMemObj, size_t cb, bool fExecutable, const char *pszTag)
467	{
468	/* sanity checks. */
469	const size_t cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
470	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
471	*pMemObj = NIL_RTR0MEMOBJ;
472	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
473	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
474	RT_ASSERT_PREEMPTIBLE();
475
476	/* do the allocation. */
477	return rtR0MemObjNativeAllocPage(pMemObj, cbAligned, fExecutable, pszTag);
478	}
479	RT_EXPORT_SYMBOL(RTR0MemObjAllocPageTag);
480
481
482	RTR0DECL(int) RTR0MemObjAllocLargeTag(PRTR0MEMOBJ pMemObj, size_t cb, size_t cbLargePage, uint32_t fFlags, const char *pszTag)
483	{
484	/* sanity checks. */
485	const size_t cbAligned = RT_ALIGN_Z(cb, cbLargePage);
486	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
487	*pMemObj = NIL_RTR0MEMOBJ;
488	#ifdef RT_ARCH_AMD64
489	AssertReturn(cbLargePage == _2M \|\| cbLargePage == _1G, VERR_OUT_OF_RANGE);
490	#elif defined(RT_ARCH_X86)
491	AssertReturn(cbLargePage == _2M \|\| cbLargePage == _4M, VERR_OUT_OF_RANGE);
492	#else
493	AssertReturn(RT_IS_POWER_OF_TWO(cbLargePage), VERR_NOT_POWER_OF_TWO);
494	AssertReturn(cbLargePage > PAGE_SIZE, VERR_OUT_OF_RANGE);
495	#endif
496	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
497	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
498	AssertReturn(!(fFlags & ~RTMEMOBJ_ALLOC_LARGE_F_VALID_MASK), VERR_INVALID_PARAMETER);
499	RT_ASSERT_PREEMPTIBLE();
500
501	/* do the allocation. */
502	return rtR0MemObjNativeAllocLarge(pMemObj, cbAligned, cbLargePage, fFlags, pszTag);
503	}
504	RT_EXPORT_SYMBOL(RTR0MemObjAllocLargeTag);
505
506
507	/**
508	* Fallback implementation of rtR0MemObjNativeAllocLarge and implements single
509	* page allocation using rtR0MemObjNativeAllocPhys.
510	*/
511	DECLHIDDEN(int) rtR0MemObjFallbackAllocLarge(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, size_t cbLargePage, uint32_t fFlags,
512	const char *pszTag)
513	{
514	RT_NOREF(pszTag, fFlags);
515	if (cb == cbLargePage)
516	return rtR0MemObjNativeAllocPhys(ppMem, cb, NIL_RTHCPHYS, cbLargePage, pszTag);
517	return VERR_NOT_SUPPORTED;
518	}
519
520
521	RTR0DECL(int) RTR0MemObjAllocLowTag(PRTR0MEMOBJ pMemObj, size_t cb, bool fExecutable, const char *pszTag)
522	{
523	/* sanity checks. */
524	const size_t cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
525	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
526	*pMemObj = NIL_RTR0MEMOBJ;
527	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
528	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
529	RT_ASSERT_PREEMPTIBLE();
530
531	/* do the allocation. */
532	return rtR0MemObjNativeAllocLow(pMemObj, cbAligned, fExecutable, pszTag);
533	}
534	RT_EXPORT_SYMBOL(RTR0MemObjAllocLowTag);
535
536
537	RTR0DECL(int) RTR0MemObjAllocContTag(PRTR0MEMOBJ pMemObj, size_t cb, bool fExecutable, const char *pszTag)
538	{
539	/* sanity checks. */
540	const size_t cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
541	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
542	*pMemObj = NIL_RTR0MEMOBJ;
543	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
544	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
545	RT_ASSERT_PREEMPTIBLE();
546
547	/* do the allocation. */
548	return rtR0MemObjNativeAllocCont(pMemObj, cbAligned, fExecutable, pszTag);
549	}
550	RT_EXPORT_SYMBOL(RTR0MemObjAllocContTag);
551
552
553	RTR0DECL(int) RTR0MemObjLockUserTag(PRTR0MEMOBJ pMemObj, RTR3PTR R3Ptr, size_t cb,
554	uint32_t fAccess, RTR0PROCESS R0Process, const char *pszTag)
555	{
556	/* sanity checks. */
557	const size_t cbAligned = RT_ALIGN_Z(cb + (R3Ptr & PAGE_OFFSET_MASK), PAGE_SIZE);
558	RTR3PTR const R3PtrAligned = (R3Ptr & ~(RTR3PTR)PAGE_OFFSET_MASK);
559	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
560	*pMemObj = NIL_RTR0MEMOBJ;
561	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
562	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
563	if (R0Process == NIL_RTR0PROCESS)
564	R0Process = RTR0ProcHandleSelf();
565	AssertReturn(!(fAccess & ~(RTMEM_PROT_READ \| RTMEM_PROT_WRITE)), VERR_INVALID_PARAMETER);
566	AssertReturn(fAccess, VERR_INVALID_PARAMETER);
567	RT_ASSERT_PREEMPTIBLE();
568
569	/* do the locking. */
570	return rtR0MemObjNativeLockUser(pMemObj, R3PtrAligned, cbAligned, fAccess, R0Process, pszTag);
571	}
572	RT_EXPORT_SYMBOL(RTR0MemObjLockUserTag);
573
574
575	RTR0DECL(int) RTR0MemObjLockKernelTag(PRTR0MEMOBJ pMemObj, void pv, size_t cb, uint32_t fAccess, const char pszTag)
576	{
577	/* sanity checks. */
578	const size_t cbAligned = RT_ALIGN_Z(cb + ((uintptr_t)pv & PAGE_OFFSET_MASK), PAGE_SIZE);
579	void * const pvAligned = (void *)((uintptr_t)pv & ~(uintptr_t)PAGE_OFFSET_MASK);
580	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
581	*pMemObj = NIL_RTR0MEMOBJ;
582	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
583	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
584	AssertPtrReturn(pvAligned, VERR_INVALID_POINTER);
585	AssertReturn(!(fAccess & ~(RTMEM_PROT_READ \| RTMEM_PROT_WRITE)), VERR_INVALID_PARAMETER);
586	AssertReturn(fAccess, VERR_INVALID_PARAMETER);
587	RT_ASSERT_PREEMPTIBLE();
588
589	/* do the allocation. */
590	return rtR0MemObjNativeLockKernel(pMemObj, pvAligned, cbAligned, fAccess, pszTag);
591	}
592	RT_EXPORT_SYMBOL(RTR0MemObjLockKernelTag);
593
594
595	RTR0DECL(int) RTR0MemObjAllocPhysTag(PRTR0MEMOBJ pMemObj, size_t cb, RTHCPHYS PhysHighest, const char *pszTag)
596	{
597	/* sanity checks. */
598	const size_t cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
599	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
600	*pMemObj = NIL_RTR0MEMOBJ;
601	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
602	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
603	AssertReturn(PhysHighest >= cb, VERR_INVALID_PARAMETER);
604	RT_ASSERT_PREEMPTIBLE();
605
606	/* do the allocation. */
607	return rtR0MemObjNativeAllocPhys(pMemObj, cbAligned, PhysHighest, PAGE_SIZE /* page aligned */, pszTag);
608	}
609	RT_EXPORT_SYMBOL(RTR0MemObjAllocPhysTag);
610
611
612	RTR0DECL(int) RTR0MemObjAllocPhysExTag(PRTR0MEMOBJ pMemObj, size_t cb, RTHCPHYS PhysHighest, size_t uAlignment, const char *pszTag)
613	{
614	/* sanity checks. */
615	const size_t cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
616	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
617	*pMemObj = NIL_RTR0MEMOBJ;
618	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
619	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
620	AssertReturn(PhysHighest >= cb, VERR_INVALID_PARAMETER);
621	if (uAlignment == 0)
622	uAlignment = PAGE_SIZE;
623	AssertReturn( uAlignment == PAGE_SIZE
624	\|\| uAlignment == _2M
625	\|\| uAlignment == _4M
626	\|\| uAlignment == _1G,
627	VERR_INVALID_PARAMETER);
628	#if HC_ARCH_BITS == 32
629	/* Memory allocated in this way is typically mapped into kernel space as well; simply
630	don't allow this on 32 bits hosts as the kernel space is too crowded already. */
631	if (uAlignment != PAGE_SIZE)
632	return VERR_NOT_SUPPORTED;
633	#endif
634	RT_ASSERT_PREEMPTIBLE();
635
636	/* do the allocation. */
637	return rtR0MemObjNativeAllocPhys(pMemObj, cbAligned, PhysHighest, uAlignment, pszTag);
638	}
639	RT_EXPORT_SYMBOL(RTR0MemObjAllocPhysExTag);
640
641
642	RTR0DECL(int) RTR0MemObjAllocPhysNCTag(PRTR0MEMOBJ pMemObj, size_t cb, RTHCPHYS PhysHighest, const char *pszTag)
643	{
644	/* sanity checks. */
645	const size_t cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
646	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
647	*pMemObj = NIL_RTR0MEMOBJ;
648	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
649	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
650	AssertReturn(PhysHighest >= cb, VERR_INVALID_PARAMETER);
651	RT_ASSERT_PREEMPTIBLE();
652
653	/* do the allocation. */
654	return rtR0MemObjNativeAllocPhysNC(pMemObj, cbAligned, PhysHighest, pszTag);
655	}
656	RT_EXPORT_SYMBOL(RTR0MemObjAllocPhysNCTag);
657
658
659	RTR0DECL(int) RTR0MemObjEnterPhysTag(PRTR0MEMOBJ pMemObj, RTHCPHYS Phys, size_t cb, uint32_t uCachePolicy, const char *pszTag)
660	{
661	/* sanity checks. */
662	const size_t cbAligned = RT_ALIGN_Z(cb + (Phys & PAGE_OFFSET_MASK), PAGE_SIZE);
663	const RTHCPHYS PhysAligned = Phys & ~(RTHCPHYS)PAGE_OFFSET_MASK;
664	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
665	*pMemObj = NIL_RTR0MEMOBJ;
666	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
667	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
668	AssertReturn(Phys != NIL_RTHCPHYS, VERR_INVALID_PARAMETER);
669	AssertReturn( uCachePolicy == RTMEM_CACHE_POLICY_DONT_CARE
670	\|\| uCachePolicy == RTMEM_CACHE_POLICY_MMIO,
671	VERR_INVALID_PARAMETER);
672	RT_ASSERT_PREEMPTIBLE();
673
674	/* do the allocation. */
675	return rtR0MemObjNativeEnterPhys(pMemObj, PhysAligned, cbAligned, uCachePolicy, pszTag);
676	}
677	RT_EXPORT_SYMBOL(RTR0MemObjEnterPhysTag);
678
679
680	RTR0DECL(int) RTR0MemObjReserveKernelTag(PRTR0MEMOBJ pMemObj, void pvFixed, size_t cb, size_t uAlignment, const char pszTag)
681	{
682	/* sanity checks. */
683	const size_t cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
684	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
685	*pMemObj = NIL_RTR0MEMOBJ;
686	if (uAlignment == 0)
687	uAlignment = PAGE_SIZE;
688	AssertReturn(uAlignment == PAGE_SIZE \|\| uAlignment == _2M \|\| uAlignment == _4M, VERR_INVALID_PARAMETER);
689	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
690	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
691	if (pvFixed != (void *)-1)
692	AssertReturn(!((uintptr_t)pvFixed & (uAlignment - 1)), VERR_INVALID_PARAMETER);
693	RT_ASSERT_PREEMPTIBLE();
694
695	/* do the reservation. */
696	return rtR0MemObjNativeReserveKernel(pMemObj, pvFixed, cbAligned, uAlignment, pszTag);
697	}
698	RT_EXPORT_SYMBOL(RTR0MemObjReserveKernelTag);
699
700
701	RTR0DECL(int) RTR0MemObjReserveUserTag(PRTR0MEMOBJ pMemObj, RTR3PTR R3PtrFixed, size_t cb,
702	size_t uAlignment, RTR0PROCESS R0Process, const char *pszTag)
703	{
704	/* sanity checks. */
705	const size_t cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
706	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
707	*pMemObj = NIL_RTR0MEMOBJ;
708	if (uAlignment == 0)
709	uAlignment = PAGE_SIZE;
710	AssertReturn(uAlignment == PAGE_SIZE \|\| uAlignment == _2M \|\| uAlignment == _4M, VERR_INVALID_PARAMETER);
711	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
712	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
713	if (R3PtrFixed != (RTR3PTR)-1)
714	AssertReturn(!(R3PtrFixed & (uAlignment - 1)), VERR_INVALID_PARAMETER);
715	if (R0Process == NIL_RTR0PROCESS)
716	R0Process = RTR0ProcHandleSelf();
717	RT_ASSERT_PREEMPTIBLE();
718
719	/* do the reservation. */
720	return rtR0MemObjNativeReserveUser(pMemObj, R3PtrFixed, cbAligned, uAlignment, R0Process, pszTag);
721	}
722	RT_EXPORT_SYMBOL(RTR0MemObjReserveUserTag);
723
724
725	RTR0DECL(int) RTR0MemObjMapKernelTag(PRTR0MEMOBJ pMemObj, RTR0MEMOBJ MemObjToMap, void *pvFixed,
726	size_t uAlignment, unsigned fProt, const char *pszTag)
727	{
728	return RTR0MemObjMapKernelExTag(pMemObj, MemObjToMap, pvFixed, uAlignment, fProt, 0, 0, pszTag);
729	}
730	RT_EXPORT_SYMBOL(RTR0MemObjMapKernelTag);
731
732
733	RTR0DECL(int) RTR0MemObjMapKernelExTag(PRTR0MEMOBJ pMemObj, RTR0MEMOBJ MemObjToMap, void *pvFixed, size_t uAlignment,
734	unsigned fProt, size_t offSub, size_t cbSub, const char *pszTag)
735	{
736	PRTR0MEMOBJINTERNAL pMemToMap;
737	PRTR0MEMOBJINTERNAL pNew;
738	int rc;
739
740	/* sanity checks. */
741	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
742	*pMemObj = NIL_RTR0MEMOBJ;
743	AssertPtrReturn(MemObjToMap, VERR_INVALID_HANDLE);
744	pMemToMap = (PRTR0MEMOBJINTERNAL)MemObjToMap;
745	AssertReturn(pMemToMap->u32Magic == RTR0MEMOBJ_MAGIC, VERR_INVALID_HANDLE);
746	AssertReturn(pMemToMap->enmType > RTR0MEMOBJTYPE_INVALID && pMemToMap->enmType < RTR0MEMOBJTYPE_END, VERR_INVALID_HANDLE);
747	AssertReturn(!rtR0MemObjIsMapping(pMemToMap), VERR_INVALID_PARAMETER);
748	AssertReturn(pMemToMap->enmType != RTR0MEMOBJTYPE_RES_VIRT, VERR_INVALID_PARAMETER);
749	if (uAlignment == 0)
750	uAlignment = PAGE_SIZE;
751	AssertReturn(uAlignment == PAGE_SIZE \|\| uAlignment == _2M \|\| uAlignment == _4M, VERR_INVALID_PARAMETER);
752	if (pvFixed != (void *)-1)
753	AssertReturn(!((uintptr_t)pvFixed & (uAlignment - 1)), VERR_INVALID_PARAMETER);
754	AssertReturn(fProt != RTMEM_PROT_NONE, VERR_INVALID_PARAMETER);
755	AssertReturn(!(fProt & ~(RTMEM_PROT_READ \| RTMEM_PROT_WRITE \| RTMEM_PROT_EXEC)), VERR_INVALID_PARAMETER);
756	AssertReturn(!(offSub & PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER);
757	AssertReturn(offSub < pMemToMap->cb, VERR_INVALID_PARAMETER);
758	AssertReturn(!(cbSub & PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER);
759	AssertReturn(cbSub <= pMemToMap->cb, VERR_INVALID_PARAMETER);
760	AssertReturn((!offSub && !cbSub) \|\| (offSub + cbSub) <= pMemToMap->cb, VERR_INVALID_PARAMETER);
761	RT_ASSERT_PREEMPTIBLE();
762
763	/* adjust the request to simplify the native code. */
764	if (offSub == 0 && cbSub == pMemToMap->cb)
765	cbSub = 0;
766
767	/* do the mapping. */
768	rc = rtR0MemObjNativeMapKernel(&pNew, pMemToMap, pvFixed, uAlignment, fProt, offSub, cbSub, pszTag);
769	if (RT_SUCCESS(rc))
770	{
771	/* link it. */
772	rc = rtR0MemObjLink(pMemToMap, pNew);
773	if (RT_SUCCESS(rc))
774	*pMemObj = pNew;
775	else
776	{
777	/* damn, out of memory. bail out. */
778	int rc2 = rtR0MemObjNativeFree(pNew);
779	AssertRC(rc2);
780	pNew->u32Magic++;
781	pNew->enmType = RTR0MEMOBJTYPE_END;
782	RTMemFree(pNew);
783	}
784	}
785
786	return rc;
787	}
788	RT_EXPORT_SYMBOL(RTR0MemObjMapKernelExTag);
789
790
791	RTR0DECL(int) RTR0MemObjMapUserTag(PRTR0MEMOBJ pMemObj, RTR0MEMOBJ MemObjToMap, RTR3PTR R3PtrFixed,
792	size_t uAlignment, unsigned fProt, RTR0PROCESS R0Process, const char *pszTag)
793	{
794	return RTR0MemObjMapUserExTag(pMemObj, MemObjToMap, R3PtrFixed, uAlignment, fProt, R0Process, 0, 0, pszTag);
795	}
796	RT_EXPORT_SYMBOL(RTR0MemObjMapUserTag);
797
798
799	RTR0DECL(int) RTR0MemObjMapUserExTag(PRTR0MEMOBJ pMemObj, RTR0MEMOBJ MemObjToMap, RTR3PTR R3PtrFixed, size_t uAlignment,
800	unsigned fProt, RTR0PROCESS R0Process, size_t offSub, size_t cbSub, const char *pszTag)
801	{
802	/* sanity checks. */
803	PRTR0MEMOBJINTERNAL pMemToMap;
804	PRTR0MEMOBJINTERNAL pNew;
805	int rc;
806	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
807	pMemToMap = (PRTR0MEMOBJINTERNAL)MemObjToMap;
808	*pMemObj = NIL_RTR0MEMOBJ;
809	AssertPtrReturn(MemObjToMap, VERR_INVALID_HANDLE);
810	AssertReturn(pMemToMap->u32Magic == RTR0MEMOBJ_MAGIC, VERR_INVALID_HANDLE);
811	AssertReturn(pMemToMap->enmType > RTR0MEMOBJTYPE_INVALID && pMemToMap->enmType < RTR0MEMOBJTYPE_END, VERR_INVALID_HANDLE);
812	AssertReturn(!rtR0MemObjIsMapping(pMemToMap), VERR_INVALID_PARAMETER);
813	AssertReturn(pMemToMap->enmType != RTR0MEMOBJTYPE_RES_VIRT, VERR_INVALID_PARAMETER);
814	if (uAlignment == 0)
815	uAlignment = PAGE_SIZE;
816	AssertReturn(uAlignment == PAGE_SIZE \|\| uAlignment == _2M \|\| uAlignment == _4M, VERR_INVALID_PARAMETER);
817	if (R3PtrFixed != (RTR3PTR)-1)
818	AssertReturn(!(R3PtrFixed & (uAlignment - 1)), VERR_INVALID_PARAMETER);
819	AssertReturn(fProt != RTMEM_PROT_NONE, VERR_INVALID_PARAMETER);
820	AssertReturn(!(fProt & ~(RTMEM_PROT_READ \| RTMEM_PROT_WRITE \| RTMEM_PROT_EXEC)), VERR_INVALID_PARAMETER);
821	AssertReturn(!(offSub & PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER);
822	AssertReturn(offSub < pMemToMap->cb, VERR_INVALID_PARAMETER);
823	AssertReturn(!(cbSub & PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER);
824	AssertReturn(cbSub <= pMemToMap->cb, VERR_INVALID_PARAMETER);
825	AssertReturn((!offSub && !cbSub) \|\| (offSub + cbSub) <= pMemToMap->cb, VERR_INVALID_PARAMETER);
826	if (R0Process == NIL_RTR0PROCESS)
827	R0Process = RTR0ProcHandleSelf();
828	RT_ASSERT_PREEMPTIBLE();
829
830	/* adjust the request to simplify the native code. */
831	if (offSub == 0 && cbSub == pMemToMap->cb)
832	cbSub = 0;
833
834	/* do the mapping. */
835	rc = rtR0MemObjNativeMapUser(&pNew, pMemToMap, R3PtrFixed, uAlignment, fProt, R0Process, offSub, cbSub, pszTag);
836	if (RT_SUCCESS(rc))
837	{
838	/* link it. */
839	rc = rtR0MemObjLink(pMemToMap, pNew);
840	if (RT_SUCCESS(rc))
841	*pMemObj = pNew;
842	else
843	{
844	/* damn, out of memory. bail out. */
845	int rc2 = rtR0MemObjNativeFree(pNew);
846	AssertRC(rc2);
847	pNew->u32Magic++;
848	pNew->enmType = RTR0MEMOBJTYPE_END;
849	RTMemFree(pNew);
850	}
851	}
852
853	return rc;
854	}
855	RT_EXPORT_SYMBOL(RTR0MemObjMapUserExTag);
856
857
858	RTR0DECL(int) RTR0MemObjProtect(RTR0MEMOBJ hMemObj, size_t offSub, size_t cbSub, uint32_t fProt)
859	{
860	PRTR0MEMOBJINTERNAL pMemObj;
861	int rc;
862
863	/* sanity checks. */
864	pMemObj = (PRTR0MEMOBJINTERNAL)hMemObj;
865	AssertPtrReturn(pMemObj, VERR_INVALID_HANDLE);
866	AssertReturn(pMemObj->u32Magic == RTR0MEMOBJ_MAGIC, VERR_INVALID_HANDLE);
867	AssertReturn(pMemObj->enmType > RTR0MEMOBJTYPE_INVALID && pMemObj->enmType < RTR0MEMOBJTYPE_END, VERR_INVALID_HANDLE);
868	AssertReturn(rtR0MemObjIsProtectable(pMemObj), VERR_INVALID_PARAMETER);
869	AssertReturn(!(offSub & PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER);
870	AssertReturn(offSub < pMemObj->cb, VERR_INVALID_PARAMETER);
871	AssertReturn(!(cbSub & PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER);
872	AssertReturn(cbSub <= pMemObj->cb, VERR_INVALID_PARAMETER);
873	AssertReturn(offSub + cbSub <= pMemObj->cb, VERR_INVALID_PARAMETER);
874	AssertReturn(!(fProt & ~(RTMEM_PROT_NONE \| RTMEM_PROT_READ \| RTMEM_PROT_WRITE \| RTMEM_PROT_EXEC)), VERR_INVALID_PARAMETER);
875	RT_ASSERT_PREEMPTIBLE();
876
877	/* do the job */
878	rc = rtR0MemObjNativeProtect(pMemObj, offSub, cbSub, fProt);
879	if (RT_SUCCESS(rc))
880	pMemObj->fFlags \|= RTR0MEMOBJ_FLAGS_PROT_CHANGED; /* record it */
881
882	return rc;
883	}
884	RT_EXPORT_SYMBOL(RTR0MemObjProtect);
885

Note: See TracBrowser for help on using the repository browser.

source: vbox/trunk/src/VBox/Runtime/r0drv/memobj-r0drv.cpp@ 92247

Download in other formats: