memobj-r0drv.cpp@ 29027

Last change on this file since 29027 was 29027, checked in by vboxsync, 15 years ago
RTR0MemObjEnterPhys/rtR0MemObjNativeEnterPhys: Validate the cache policy in the common code. Use uint32_t as parameter type. All native implementations must set the policy member.
Property svn:eol-style set to `native` Property svn:keywords set to `Id Rev`
File size: 36.8 KB

Line
1	/* $Revision: 29027 $ */
2	/** @file
3	* IPRT - Ring-0 Memory Objects, Common Code.
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 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	#include <iprt/memobj.h>
33	#include "internal/iprt.h"
34
35	#include <iprt/alloc.h>
36	#include <iprt/asm.h>
37	#include <iprt/assert.h>
38	#include <iprt/err.h>
39	#include <iprt/log.h>
40	#include <iprt/mp.h>
41	#include <iprt/param.h>
42	#include <iprt/process.h>
43	#include <iprt/thread.h>
44
45	#include "internal/memobj.h"
46
47
48	/**
49	* Internal function for allocating a new memory object.
50	*
51	* @returns The allocated and initialized handle.
52	* @param cbSelf The size of the memory object handle. 0 mean default size.
53	* @param enmType The memory object type.
54	* @param pv The memory object mapping.
55	* @param cb The size of the memory object.
56	*/
57	PRTR0MEMOBJINTERNAL rtR0MemObjNew(size_t cbSelf, RTR0MEMOBJTYPE enmType, void *pv, size_t cb)
58	{
59	PRTR0MEMOBJINTERNAL pNew;
60
61	/* validate the size */
62	if (!cbSelf)
63	cbSelf = sizeof(*pNew);
64	Assert(cbSelf >= sizeof(*pNew));
65	Assert(cbSelf == (uint32_t)cbSelf);
66
67	/*
68	* Allocate and initialize the object.
69	*/
70	pNew = (PRTR0MEMOBJINTERNAL)RTMemAllocZ(cbSelf);
71	if (pNew)
72	{
73	pNew->u32Magic = RTR0MEMOBJ_MAGIC;
74	pNew->cbSelf = (uint32_t)cbSelf;
75	pNew->enmType = enmType;
76	pNew->fFlags = 0;
77	pNew->cb = cb;
78	pNew->pv = pv;
79	}
80	return pNew;
81	}
82
83
84	/**
85	* Deletes an incomplete memory object.
86	*
87	* This is for cleaning up after failures during object creation.
88	*
89	* @param pMem The incomplete memory object to delete.
90	*/
91	void rtR0MemObjDelete(PRTR0MEMOBJINTERNAL pMem)
92	{
93	if (pMem)
94	{
95	ASMAtomicUoWriteU32(&pMem->u32Magic, ~RTR0MEMOBJ_MAGIC);
96	pMem->enmType = RTR0MEMOBJTYPE_END;
97	RTMemFree(pMem);
98	}
99	}
100
101
102	/**
103	* Links a mapping object to a primary object.
104	*
105	* @returns IPRT status code.
106	* @retval VINF_SUCCESS on success.
107	* @retval VINF_NO_MEMORY if we couldn't expand the mapping array of the parent.
108	* @param pParent The parent (primary) memory object.
109	* @param pChild The child (mapping) memory object.
110	*/
111	static int rtR0MemObjLink(PRTR0MEMOBJINTERNAL pParent, PRTR0MEMOBJINTERNAL pChild)
112	{
113	uint32_t i;
114
115	/* sanity */
116	Assert(rtR0MemObjIsMapping(pChild));
117	Assert(!rtR0MemObjIsMapping(pParent));
118
119	/* expand the array? */
120	i = pParent->uRel.Parent.cMappings;
121	if (i >= pParent->uRel.Parent.cMappingsAllocated)
122	{
123	void *pv = RTMemRealloc(pParent->uRel.Parent.papMappings,
124	(i + 32) * sizeof(pParent->uRel.Parent.papMappings[0]));
125	if (!pv)
126	return VERR_NO_MEMORY;
127	pParent->uRel.Parent.papMappings = (PPRTR0MEMOBJINTERNAL)pv;
128	pParent->uRel.Parent.cMappingsAllocated = i + 32;
129	Assert(i == pParent->uRel.Parent.cMappings);
130	}
131
132	/* do the linking. */
133	pParent->uRel.Parent.papMappings[i] = pChild;
134	pParent->uRel.Parent.cMappings++;
135	pChild->uRel.Child.pParent = pParent;
136
137	return VINF_SUCCESS;
138	}
139
140
141	/**
142	* Checks if this is mapping or not.
143	*
144	* @returns true if it's a mapping, otherwise false.
145	* @param MemObj The ring-0 memory object handle.
146	*/
147	RTR0DECL(bool) RTR0MemObjIsMapping(RTR0MEMOBJ MemObj)
148	{
149	/* Validate the object handle. */
150	PRTR0MEMOBJINTERNAL pMem;
151	AssertPtrReturn(MemObj, false);
152	pMem = (PRTR0MEMOBJINTERNAL)MemObj;
153	AssertMsgReturn(pMem->u32Magic == RTR0MEMOBJ_MAGIC, ("%p: %#x\n", pMem, pMem->u32Magic), false);
154	AssertMsgReturn(pMem->enmType > RTR0MEMOBJTYPE_INVALID && pMem->enmType < RTR0MEMOBJTYPE_END, ("%p: %d\n", pMem, pMem->enmType), false);
155
156	/* hand it on to the inlined worker. */
157	return rtR0MemObjIsMapping(pMem);
158	}
159	RT_EXPORT_SYMBOL(RTR0MemObjIsMapping);
160
161
162	/**
163	* Gets the address of a ring-0 memory object.
164	*
165	* @returns The address of the memory object.
166	* @returns NULL if the handle is invalid (asserts in strict builds) or if there isn't any mapping.
167	* @param MemObj The ring-0 memory object handle.
168	*/
169	RTR0DECL(void *) RTR0MemObjAddress(RTR0MEMOBJ MemObj)
170	{
171	/* Validate the object handle. */
172	PRTR0MEMOBJINTERNAL pMem;
173	if (RT_UNLIKELY(MemObj == NIL_RTR0MEMOBJ))
174	return NULL;
175	AssertPtrReturn(MemObj, NULL);
176	pMem = (PRTR0MEMOBJINTERNAL)MemObj;
177	AssertMsgReturn(pMem->u32Magic == RTR0MEMOBJ_MAGIC, ("%p: %#x\n", pMem, pMem->u32Magic), NULL);
178	AssertMsgReturn(pMem->enmType > RTR0MEMOBJTYPE_INVALID && pMem->enmType < RTR0MEMOBJTYPE_END, ("%p: %d\n", pMem, pMem->enmType), NULL);
179
180	/* return the mapping address. */
181	return pMem->pv;
182	}
183	RT_EXPORT_SYMBOL(RTR0MemObjAddress);
184
185
186	/**
187	* Gets the ring-3 address of a ring-0 memory object.
188	*
189	* This only applies to ring-0 memory object with ring-3 mappings of some kind, i.e.
190	* locked user memory, reserved user address space and user mappings. This API should
191	* not be used on any other objects.
192	*
193	* @returns The address of the memory object.
194	* @returns NIL_RTR3PTR if the handle is invalid or if it's not an object with a ring-3 mapping.
195	* Strict builds will assert in both cases.
196	* @param MemObj The ring-0 memory object handle.
197	*/
198	RTR0DECL(RTR3PTR) RTR0MemObjAddressR3(RTR0MEMOBJ MemObj)
199	{
200	PRTR0MEMOBJINTERNAL pMem;
201
202	/* Validate the object handle. */
203	if (RT_UNLIKELY(MemObj == NIL_RTR0MEMOBJ))
204	return NIL_RTR3PTR;
205	AssertPtrReturn(MemObj, NIL_RTR3PTR);
206	pMem = (PRTR0MEMOBJINTERNAL)MemObj;
207	AssertMsgReturn(pMem->u32Magic == RTR0MEMOBJ_MAGIC, ("%p: %#x\n", pMem, pMem->u32Magic), NIL_RTR3PTR);
208	AssertMsgReturn(pMem->enmType > RTR0MEMOBJTYPE_INVALID && pMem->enmType < RTR0MEMOBJTYPE_END, ("%p: %d\n", pMem, pMem->enmType), NIL_RTR3PTR);
209	if (RT_UNLIKELY( ( pMem->enmType != RTR0MEMOBJTYPE_MAPPING
210	\|\| pMem->u.Mapping.R0Process == NIL_RTR0PROCESS)
211	&& ( pMem->enmType != RTR0MEMOBJTYPE_LOCK
212	\|\| pMem->u.Lock.R0Process == NIL_RTR0PROCESS)
213	&& ( pMem->enmType != RTR0MEMOBJTYPE_PHYS_NC
214	\|\| pMem->u.Lock.R0Process == NIL_RTR0PROCESS)
215	&& ( pMem->enmType != RTR0MEMOBJTYPE_RES_VIRT
216	\|\| pMem->u.ResVirt.R0Process == NIL_RTR0PROCESS)))
217	return NIL_RTR3PTR;
218
219	/* return the mapping address. */
220	return (RTR3PTR)pMem->pv;
221	}
222	RT_EXPORT_SYMBOL(RTR0MemObjAddressR3);
223
224
225	/**
226	* Gets the size of a ring-0 memory object.
227	*
228	* @returns The address of the memory object.
229	* @returns 0 if the handle is invalid (asserts in strict builds) or if there isn't any mapping.
230	* @param MemObj The ring-0 memory object handle.
231	*/
232	RTR0DECL(size_t) RTR0MemObjSize(RTR0MEMOBJ MemObj)
233	{
234	PRTR0MEMOBJINTERNAL pMem;
235
236	/* Validate the object handle. */
237	if (RT_UNLIKELY(MemObj == NIL_RTR0MEMOBJ))
238	return 0;
239	AssertPtrReturn(MemObj, 0);
240	pMem = (PRTR0MEMOBJINTERNAL)MemObj;
241	AssertMsgReturn(pMem->u32Magic == RTR0MEMOBJ_MAGIC, ("%p: %#x\n", pMem, pMem->u32Magic), 0);
242	AssertMsgReturn(pMem->enmType > RTR0MEMOBJTYPE_INVALID && pMem->enmType < RTR0MEMOBJTYPE_END, ("%p: %d\n", pMem, pMem->enmType), 0);
243
244	/* return the size. */
245	return pMem->cb;
246	}
247	RT_EXPORT_SYMBOL(RTR0MemObjSize);
248
249
250	/**
251	* Get the physical address of an page in the memory object.
252	*
253	* @returns The physical address.
254	* @returns NIL_RTHCPHYS if the object doesn't contain fixed physical pages.
255	* @returns NIL_RTHCPHYS if the iPage is out of range.
256	* @returns NIL_RTHCPHYS if the object handle isn't valid.
257	* @param MemObj The ring-0 memory object handle.
258	* @param iPage The page number within the object.
259	*/
260	RTR0DECL(RTHCPHYS) RTR0MemObjGetPagePhysAddr(RTR0MEMOBJ MemObj, size_t iPage)
261	{
262	/* Validate the object handle. */
263	PRTR0MEMOBJINTERNAL pMem;
264	size_t cPages;
265	AssertPtrReturn(MemObj, NIL_RTHCPHYS);
266	pMem = (PRTR0MEMOBJINTERNAL)MemObj;
267	AssertReturn(pMem->u32Magic == RTR0MEMOBJ_MAGIC, NIL_RTHCPHYS);
268	AssertReturn(pMem->enmType > RTR0MEMOBJTYPE_INVALID && pMem->enmType < RTR0MEMOBJTYPE_END, NIL_RTHCPHYS);
269	AssertMsgReturn(pMem->u32Magic == RTR0MEMOBJ_MAGIC, ("%p: %#x\n", pMem, pMem->u32Magic), NIL_RTHCPHYS);
270	AssertMsgReturn(pMem->enmType > RTR0MEMOBJTYPE_INVALID && pMem->enmType < RTR0MEMOBJTYPE_END, ("%p: %d\n", pMem, pMem->enmType), NIL_RTHCPHYS);
271	cPages = (pMem->cb >> PAGE_SHIFT);
272	if (iPage >= cPages)
273	{
274	/* permit: while (RTR0MemObjGetPagePhysAddr(pMem, iPage++) != NIL_RTHCPHYS) {} */
275	if (iPage == cPages)
276	return NIL_RTHCPHYS;
277	AssertReturn(iPage < (pMem->cb >> PAGE_SHIFT), NIL_RTHCPHYS);
278	}
279
280	/*
281	* We know the address of physically contiguous allocations and mappings.
282	*/
283	if (pMem->enmType == RTR0MEMOBJTYPE_CONT)
284	return pMem->u.Cont.Phys + iPage * PAGE_SIZE;
285	if (pMem->enmType == RTR0MEMOBJTYPE_PHYS)
286	return pMem->u.Phys.PhysBase + iPage * PAGE_SIZE;
287
288	/*
289	* Do the job.
290	*/
291	return rtR0MemObjNativeGetPagePhysAddr(pMem, iPage);
292	}
293	RT_EXPORT_SYMBOL(RTR0MemObjGetPagePhysAddr);
294
295
296	/**
297	* Frees a ring-0 memory object.
298	*
299	* @returns IPRT status code.
300	* @retval VERR_INVALID_HANDLE if
301	* @param MemObj The ring-0 memory object to be freed. NULL is accepted.
302	* @param fFreeMappings Whether or not to free mappings of the object.
303	*/
304	RTR0DECL(int) RTR0MemObjFree(RTR0MEMOBJ MemObj, bool fFreeMappings)
305	{
306	/*
307	* Validate the object handle.
308	*/
309	PRTR0MEMOBJINTERNAL pMem;
310	int rc;
311
312	if (MemObj == NIL_RTR0MEMOBJ)
313	return VINF_SUCCESS;
314	AssertPtrReturn(MemObj, VERR_INVALID_HANDLE);
315	pMem = (PRTR0MEMOBJINTERNAL)MemObj;
316	AssertReturn(pMem->u32Magic == RTR0MEMOBJ_MAGIC, VERR_INVALID_HANDLE);
317	AssertReturn(pMem->enmType > RTR0MEMOBJTYPE_INVALID && pMem->enmType < RTR0MEMOBJTYPE_END, VERR_INVALID_HANDLE);
318	RT_ASSERT_PREEMPTIBLE();
319
320	/*
321	* Deal with mapings according to fFreeMappings.
322	*/
323	if ( !rtR0MemObjIsMapping(pMem)
324	&& pMem->uRel.Parent.cMappings > 0)
325	{
326	/* fail if not requested to free mappings. */
327	if (!fFreeMappings)
328	return VERR_MEMORY_BUSY;
329
330	while (pMem->uRel.Parent.cMappings > 0)
331	{
332	PRTR0MEMOBJINTERNAL pChild = pMem->uRel.Parent.papMappings[--pMem->uRel.Parent.cMappings];
333	pMem->uRel.Parent.papMappings[pMem->uRel.Parent.cMappings] = NULL;
334
335	/* sanity checks. */
336	AssertPtr(pChild);
337	AssertFatal(pChild->u32Magic == RTR0MEMOBJ_MAGIC);
338	AssertFatal(pChild->enmType > RTR0MEMOBJTYPE_INVALID && pChild->enmType < RTR0MEMOBJTYPE_END);
339	AssertFatal(rtR0MemObjIsMapping(pChild));
340
341	/* free the mapping. */
342	rc = rtR0MemObjNativeFree(pChild);
343	if (RT_FAILURE(rc))
344	{
345	Log(("RTR0MemObjFree: failed to free mapping %p: %p %#zx; rc=%Rrc\n", pChild, pChild->pv, pChild->cb, rc));
346	pMem->uRel.Parent.papMappings[pMem->uRel.Parent.cMappings++] = pChild;
347	return rc;
348	}
349	}
350	}
351
352	/*
353	* Free this object.
354	*/
355	rc = rtR0MemObjNativeFree(pMem);
356	if (RT_SUCCESS(rc))
357	{
358	/*
359	* Ok, it was freed just fine. Now, if it's a mapping we'll have to remove it from the parent.
360	*/
361	if (rtR0MemObjIsMapping(pMem))
362	{
363	PRTR0MEMOBJINTERNAL pParent = pMem->uRel.Child.pParent;
364	uint32_t i;
365
366	/* sanity checks */
367	AssertPtr(pParent);
368	AssertFatal(pParent->u32Magic == RTR0MEMOBJ_MAGIC);
369	AssertFatal(pParent->enmType > RTR0MEMOBJTYPE_INVALID && pParent->enmType < RTR0MEMOBJTYPE_END);
370	AssertFatal(!rtR0MemObjIsMapping(pParent));
371	AssertFatal(pParent->uRel.Parent.cMappings > 0);
372	AssertPtr(pParent->uRel.Parent.papMappings);
373
374	/* locate and remove from the array of mappings. */
375	i = pParent->uRel.Parent.cMappings;
376	while (i-- > 0)
377	{
378	if (pParent->uRel.Parent.papMappings[i] == pMem)
379	{
380	pParent->uRel.Parent.papMappings[i] = pParent->uRel.Parent.papMappings[--pParent->uRel.Parent.cMappings];
381	break;
382	}
383	}
384	Assert(i != UINT32_MAX);
385	}
386	else
387	Assert(pMem->uRel.Parent.cMappings == 0);
388
389	/*
390	* Finally, destroy the handle.
391	*/
392	pMem->u32Magic++;
393	pMem->enmType = RTR0MEMOBJTYPE_END;
394	if (!rtR0MemObjIsMapping(pMem))
395	RTMemFree(pMem->uRel.Parent.papMappings);
396	RTMemFree(pMem);
397	}
398	else
399	Log(("RTR0MemObjFree: failed to free %p: %d %p %#zx; rc=%Rrc\n",
400	pMem, pMem->enmType, pMem->pv, pMem->cb, rc));
401	return rc;
402	}
403	RT_EXPORT_SYMBOL(RTR0MemObjFree);
404
405
406
407	/**
408	* Allocates page aligned virtual kernel memory.
409	*
410	* The memory is taken from a non paged (= fixed physical memory backing) pool.
411	*
412	* @returns IPRT status code.
413	* @param pMemObj Where to store the ring-0 memory object handle.
414	* @param cb Number of bytes to allocate. This is rounded up to nearest page.
415	* @param fExecutable Flag indicating whether it should be permitted to executed code in the memory object.
416	*/
417	RTR0DECL(int) RTR0MemObjAllocPage(PRTR0MEMOBJ pMemObj, size_t cb, bool fExecutable)
418	{
419	/* sanity checks. */
420	const size_t cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
421	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
422	*pMemObj = NIL_RTR0MEMOBJ;
423	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
424	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
425	RT_ASSERT_PREEMPTIBLE();
426
427	/* do the allocation. */
428	return rtR0MemObjNativeAllocPage(pMemObj, cbAligned, fExecutable);
429	}
430	RT_EXPORT_SYMBOL(RTR0MemObjAllocPage);
431
432
433	/**
434	* Allocates page aligned virtual kernel memory with physical backing below 4GB.
435	*
436	* The physical memory backing the allocation is fixed.
437	*
438	* @returns IPRT status code.
439	* @param pMemObj Where to store the ring-0 memory object handle.
440	* @param cb Number of bytes to allocate. This is rounded up to nearest page.
441	* @param fExecutable Flag indicating whether it should be permitted to executed code in the memory object.
442	*/
443	RTR0DECL(int) RTR0MemObjAllocLow(PRTR0MEMOBJ pMemObj, size_t cb, bool fExecutable)
444	{
445	/* sanity checks. */
446	const size_t cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
447	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
448	*pMemObj = NIL_RTR0MEMOBJ;
449	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
450	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
451	RT_ASSERT_PREEMPTIBLE();
452
453	/* do the allocation. */
454	return rtR0MemObjNativeAllocLow(pMemObj, cbAligned, fExecutable);
455	}
456	RT_EXPORT_SYMBOL(RTR0MemObjAllocLow);
457
458
459	/**
460	* Allocates page aligned virtual kernel memory with contiguous physical backing below 4GB.
461	*
462	* The physical memory backing the allocation is fixed.
463	*
464	* @returns IPRT status code.
465	* @param pMemObj Where to store the ring-0 memory object handle.
466	* @param cb Number of bytes to allocate. This is rounded up to nearest page.
467	* @param fExecutable Flag indicating whether it should be permitted to executed code in the memory object.
468	*/
469	RTR0DECL(int) RTR0MemObjAllocCont(PRTR0MEMOBJ pMemObj, size_t cb, bool fExecutable)
470	{
471	/* sanity checks. */
472	const size_t cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
473	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
474	*pMemObj = NIL_RTR0MEMOBJ;
475	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
476	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
477	RT_ASSERT_PREEMPTIBLE();
478
479	/* do the allocation. */
480	return rtR0MemObjNativeAllocCont(pMemObj, cbAligned, fExecutable);
481	}
482	RT_EXPORT_SYMBOL(RTR0MemObjAllocCont);
483
484
485	/**
486	* Locks a range of user virtual memory.
487	*
488	* @returns IPRT status code.
489	* @param pMemObj Where to store the ring-0 memory object handle.
490	* @param R3Ptr User virtual address. This is rounded down to a page
491	* boundrary.
492	* @param cb Number of bytes to lock. This is rounded up to
493	* nearest page boundrary.
494	* @param fAccess The desired access, a combination of RTMEM_PROT_READ
495	* and RTMEM_PROT_WRITE.
496	* @param R0Process The process to lock pages in. NIL_RTR0PROCESS is an
497	* alias for the current one.
498	*
499	* @remarks RTR0MemGetAddressR3() and RTR0MemGetAddress() will return therounded
500	* down address.
501	*
502	* @remarks Linux: This API requires that the memory begin locked is in a memory
503	* mapping that is not required in any forked off child process. This
504	* is not intented as permanent restriction, feel free to help out
505	* lifting it.
506	*/
507	RTR0DECL(int) RTR0MemObjLockUser(PRTR0MEMOBJ pMemObj, RTR3PTR R3Ptr, size_t cb, uint32_t fAccess, RTR0PROCESS R0Process)
508	{
509	/* sanity checks. */
510	const size_t cbAligned = RT_ALIGN_Z(cb + (R3Ptr & PAGE_OFFSET_MASK), PAGE_SIZE);
511	RTR3PTR const R3PtrAligned = (R3Ptr & ~(RTR3PTR)PAGE_OFFSET_MASK);
512	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
513	*pMemObj = NIL_RTR0MEMOBJ;
514	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
515	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
516	if (R0Process == NIL_RTR0PROCESS)
517	R0Process = RTR0ProcHandleSelf();
518	AssertReturn(!(fAccess & ~(RTMEM_PROT_READ \| RTMEM_PROT_WRITE)), VERR_INVALID_PARAMETER);
519	AssertReturn(fAccess, VERR_INVALID_PARAMETER);
520	RT_ASSERT_PREEMPTIBLE();
521
522	/* do the locking. */
523	return rtR0MemObjNativeLockUser(pMemObj, R3PtrAligned, cbAligned, fAccess, R0Process);
524	}
525	RT_EXPORT_SYMBOL(RTR0MemObjLockUser);
526
527
528	/**
529	* Locks a range of kernel virtual memory.
530	*
531	* @returns IPRT status code.
532	* @param pMemObj Where to store the ring-0 memory object handle.
533	* @param pv Kernel virtual address. This is rounded down to a page boundrary.
534	* @param cb Number of bytes to lock. This is rounded up to nearest page boundrary.
535	* @param fAccess The desired access, a combination of RTMEM_PROT_READ
536	* and RTMEM_PROT_WRITE.
537	*
538	* @remark RTR0MemGetAddress() will return the rounded down address.
539	*/
540	RTR0DECL(int) RTR0MemObjLockKernel(PRTR0MEMOBJ pMemObj, void *pv, size_t cb, uint32_t fAccess)
541	{
542	/* sanity checks. */
543	const size_t cbAligned = RT_ALIGN_Z(cb + ((uintptr_t)pv & PAGE_OFFSET_MASK), PAGE_SIZE);
544	void * const pvAligned = (void *)((uintptr_t)pv & ~(uintptr_t)PAGE_OFFSET_MASK);
545	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
546	*pMemObj = NIL_RTR0MEMOBJ;
547	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
548	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
549	AssertPtrReturn(pvAligned, VERR_INVALID_POINTER);
550	AssertReturn(!(fAccess & ~(RTMEM_PROT_READ \| RTMEM_PROT_WRITE)), VERR_INVALID_PARAMETER);
551	AssertReturn(fAccess, VERR_INVALID_PARAMETER);
552	RT_ASSERT_PREEMPTIBLE();
553
554	/* do the allocation. */
555	return rtR0MemObjNativeLockKernel(pMemObj, pvAligned, cbAligned, fAccess);
556	}
557	RT_EXPORT_SYMBOL(RTR0MemObjLockKernel);
558
559
560	/**
561	* Allocates contiguous page aligned physical memory without (necessarily) any kernel mapping.
562	*
563	* @returns IPRT status code.
564	* @param pMemObj Where to store the ring-0 memory object handle.
565	* @param cb Number of bytes to allocate. This is rounded up to nearest page.
566	* @param PhysHighest The highest permittable address (inclusive).
567	* Pass NIL_RTHCPHYS if any address is acceptable.
568	*/
569	RTR0DECL(int) RTR0MemObjAllocPhys(PRTR0MEMOBJ pMemObj, size_t cb, RTHCPHYS PhysHighest)
570	{
571	/* sanity checks. */
572	const size_t cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
573	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
574	*pMemObj = NIL_RTR0MEMOBJ;
575	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
576	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
577	AssertReturn(PhysHighest >= cb, VERR_INVALID_PARAMETER);
578	RT_ASSERT_PREEMPTIBLE();
579
580	/* do the allocation. */
581	return rtR0MemObjNativeAllocPhys(pMemObj, cbAligned, PhysHighest, PAGE_SIZE /* page aligned */);
582	}
583	RT_EXPORT_SYMBOL(RTR0MemObjAllocPhys);
584
585
586	/**
587	* Allocates contiguous physical memory without (necessarily) any kernel mapping.
588	*
589	* @returns IPRT status code.
590	* @param pMemObj Where to store the ring-0 memory object handle.
591	* @param cb Number of bytes to allocate. This is rounded up to nearest page.
592	* @param PhysHighest The highest permittable address (inclusive).
593	* Pass NIL_RTHCPHYS if any address is acceptable.
594	* @param uAlignment The alignment of the physical memory to allocate.
595	* Supported values are 0 (alias for PAGE_SIZE), PAGE_SIZE, _2M, _4M and _1G.
596	*/
597	RTR0DECL(int) RTR0MemObjAllocPhysEx(PRTR0MEMOBJ pMemObj, size_t cb, RTHCPHYS PhysHighest, size_t uAlignment)
598	{
599	/* sanity checks. */
600	const size_t cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
601	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
602	*pMemObj = NIL_RTR0MEMOBJ;
603	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
604	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
605	AssertReturn(PhysHighest >= cb, VERR_INVALID_PARAMETER);
606	if (uAlignment == 0)
607	uAlignment = PAGE_SIZE;
608	AssertReturn( uAlignment == PAGE_SIZE
609	\|\| uAlignment == _2M
610	\|\| uAlignment == _4M
611	\|\| uAlignment == _1G,
612	VERR_INVALID_PARAMETER);
613	#if HC_ARCH_BITS == 32
614	/* Memory allocated in this way is typically mapped into kernel space as well; simply
615	don't allow this on 32 bits hosts as the kernel space is too crowded already. */
616	if (uAlignment != PAGE_SIZE)
617	return VERR_NOT_SUPPORTED;
618	#endif
619	RT_ASSERT_PREEMPTIBLE();
620
621	/* do the allocation. */
622	return rtR0MemObjNativeAllocPhys(pMemObj, cbAligned, PhysHighest, uAlignment);
623	}
624	RT_EXPORT_SYMBOL(RTR0MemObjAllocPhysEx);
625
626
627	/**
628	* Allocates non-contiguous page aligned physical memory without (necessarily) any kernel mapping.
629	*
630	* @returns IPRT status code.
631	* @param pMemObj Where to store the ring-0 memory object handle.
632	* @param cb Number of bytes to allocate. This is rounded up to nearest page.
633	* @param PhysHighest The highest permittable address (inclusive).
634	* Pass NIL_RTHCPHYS if any address is acceptable.
635	*/
636	RTR0DECL(int) RTR0MemObjAllocPhysNC(PRTR0MEMOBJ pMemObj, size_t cb, RTHCPHYS PhysHighest)
637	{
638	/* sanity checks. */
639	const size_t cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
640	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
641	*pMemObj = NIL_RTR0MEMOBJ;
642	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
643	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
644	AssertReturn(PhysHighest >= cb, VERR_INVALID_PARAMETER);
645	RT_ASSERT_PREEMPTIBLE();
646
647	/* do the allocation. */
648	return rtR0MemObjNativeAllocPhysNC(pMemObj, cbAligned, PhysHighest);
649	}
650	RT_EXPORT_SYMBOL(RTR0MemObjAllocPhysNC);
651
652
653	/**
654	* Creates a page aligned, contiguous, physical memory object.
655	*
656	* No physical memory is allocated, we trust you do know what you're doing.
657	*
658	* @returns IPRT status code.
659	* @param pMemObj Where to store the ring-0 memory object handle.
660	* @param Phys The physical address to start at. This is rounded down to the
661	* nearest page boundrary.
662	* @param cb The size of the object in bytes. This is rounded up to nearest page boundrary.
663	* @param uCachePolicy One of the RTMEM_CACHE_XXX modes.
664	*/
665	RTR0DECL(int) RTR0MemObjEnterPhys(PRTR0MEMOBJ pMemObj, RTHCPHYS Phys, size_t cb, uint32_t uCachePolicy)
666	{
667	/* sanity checks. */
668	const size_t cbAligned = RT_ALIGN_Z(cb + (Phys & PAGE_OFFSET_MASK), PAGE_SIZE);
669	const RTHCPHYS PhysAligned = Phys & ~(RTHCPHYS)PAGE_OFFSET_MASK;
670	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
671	*pMemObj = NIL_RTR0MEMOBJ;
672	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
673	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
674	AssertReturn(Phys != NIL_RTHCPHYS, VERR_INVALID_PARAMETER);
675	AssertReturn( uCachePolicy == RTMEM_CACHE_POLICY_DONT_CARE
676	\|\| uCachePolicy == RTMEM_CACHE_POLICY_MMIO,
677	VERR_INVALID_PARAMETER);
678	RT_ASSERT_PREEMPTIBLE();
679
680	/* do the allocation. */
681	return rtR0MemObjNativeEnterPhys(pMemObj, PhysAligned, cbAligned, uCachePolicy);
682	}
683	RT_EXPORT_SYMBOL(RTR0MemObjEnterPhys);
684
685
686	/**
687	* Reserves kernel virtual address space.
688	*
689	* @returns IPRT status code.
690	* @param pMemObj Where to store the ring-0 memory object handle.
691	* @param pvFixed Requested address. (void *)-1 means any address. This must match the alignment.
692	* @param cb The number of bytes to reserve. This is rounded up to nearest page.
693	* @param uAlignment The alignment of the reserved memory.
694	* Supported values are 0 (alias for PAGE_SIZE), PAGE_SIZE, _2M and _4M.
695	*/
696	RTR0DECL(int) RTR0MemObjReserveKernel(PRTR0MEMOBJ pMemObj, void *pvFixed, size_t cb, size_t uAlignment)
697	{
698	/* sanity checks. */
699	const size_t cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
700	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
701	*pMemObj = NIL_RTR0MEMOBJ;
702	if (uAlignment == 0)
703	uAlignment = PAGE_SIZE;
704	AssertReturn(uAlignment == PAGE_SIZE \|\| uAlignment == _2M \|\| uAlignment == _4M, VERR_INVALID_PARAMETER);
705	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
706	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
707	if (pvFixed != (void *)-1)
708	AssertReturn(!((uintptr_t)pvFixed & (uAlignment - 1)), VERR_INVALID_PARAMETER);
709	RT_ASSERT_PREEMPTIBLE();
710
711	/* do the reservation. */
712	return rtR0MemObjNativeReserveKernel(pMemObj, pvFixed, cbAligned, uAlignment);
713	}
714	RT_EXPORT_SYMBOL(RTR0MemObjReserveKernel);
715
716
717	/**
718	* Reserves user virtual address space in the current process.
719	*
720	* @returns IPRT status code.
721	* @param pMemObj Where to store the ring-0 memory object handle.
722	* @param R3PtrFixed Requested address. (RTR3PTR)-1 means any address. This must match the alignment.
723	* @param cb The number of bytes to reserve. This is rounded up to nearest PAGE_SIZE.
724	* @param uAlignment The alignment of the reserved memory.
725	* Supported values are 0 (alias for PAGE_SIZE), PAGE_SIZE, _2M and _4M.
726	* @param R0Process The process to reserve the memory in. NIL_RTR0PROCESS is an alias for the current one.
727	*/
728	RTR0DECL(int) RTR0MemObjReserveUser(PRTR0MEMOBJ pMemObj, RTR3PTR R3PtrFixed, size_t cb, size_t uAlignment, RTR0PROCESS R0Process)
729	{
730	/* sanity checks. */
731	const size_t cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
732	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
733	*pMemObj = NIL_RTR0MEMOBJ;
734	if (uAlignment == 0)
735	uAlignment = PAGE_SIZE;
736	AssertReturn(uAlignment == PAGE_SIZE \|\| uAlignment == _2M \|\| uAlignment == _4M, VERR_INVALID_PARAMETER);
737	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
738	AssertReturn(cb <= cbAligned, VERR_INVALID_PARAMETER);
739	if (R3PtrFixed != (RTR3PTR)-1)
740	AssertReturn(!(R3PtrFixed & (uAlignment - 1)), VERR_INVALID_PARAMETER);
741	if (R0Process == NIL_RTR0PROCESS)
742	R0Process = RTR0ProcHandleSelf();
743	RT_ASSERT_PREEMPTIBLE();
744
745	/* do the reservation. */
746	return rtR0MemObjNativeReserveUser(pMemObj, R3PtrFixed, cbAligned, uAlignment, R0Process);
747	}
748	RT_EXPORT_SYMBOL(RTR0MemObjReserveUser);
749
750
751	/**
752	* Maps a memory object into kernel virtual address space.
753	*
754	* @returns IPRT status code.
755	* @param pMemObj Where to store the ring-0 memory object handle of the mapping object.
756	* @param MemObjToMap The object to be map.
757	* @param pvFixed Requested address. (void *)-1 means any address. This must match the alignment.
758	* @param uAlignment The alignment of the reserved memory.
759	* Supported values are 0 (alias for PAGE_SIZE), PAGE_SIZE, _2M and _4M.
760	* @param fProt Combination of RTMEM_PROT_* flags (except RTMEM_PROT_NONE).
761	*/
762	RTR0DECL(int) RTR0MemObjMapKernel(PRTR0MEMOBJ pMemObj, RTR0MEMOBJ MemObjToMap, void *pvFixed, size_t uAlignment, unsigned fProt)
763	{
764	return RTR0MemObjMapKernelEx(pMemObj, MemObjToMap, pvFixed, uAlignment, fProt, 0, 0);
765	}
766	RT_EXPORT_SYMBOL(RTR0MemObjMapKernel);
767
768
769	/**
770	* Maps a memory object into kernel virtual address space.
771	*
772	* The ability to map subsections of the object into kernel space is currently
773	* not implemented on all platforms. All/Most of platforms supports mapping the
774	* whole object into kernel space.
775	*
776	* @returns IPRT status code.
777	* @retval VERR_NOT_SUPPORTED if it's not possible to map a subsection of a
778	* memory object on this platform. When you hit this, try implement it.
779	*
780	* @param pMemObj Where to store the ring-0 memory object handle of the mapping object.
781	* @param MemObjToMap The object to be map.
782	* @param pvFixed Requested address. (void *)-1 means any address. This must match the alignment.
783	* @param uAlignment The alignment of the reserved memory.
784	* Supported values are 0 (alias for PAGE_SIZE), PAGE_SIZE, _2M and _4M.
785	* @param fProt Combination of RTMEM_PROT_* flags (except RTMEM_PROT_NONE).
786	* @param offSub Where in the object to start mapping. If non-zero
787	* the value must be page aligned and cbSub must be
788	* non-zero as well.
789	* @param cbSub The size of the part of the object to be mapped. If
790	* zero the entire object is mapped. The value must be
791	* page aligned.
792	*/
793	RTR0DECL(int) RTR0MemObjMapKernelEx(PRTR0MEMOBJ pMemObj, RTR0MEMOBJ MemObjToMap, void *pvFixed, size_t uAlignment,
794	unsigned fProt, size_t offSub, size_t cbSub)
795	{
796	PRTR0MEMOBJINTERNAL pMemToMap;
797	PRTR0MEMOBJINTERNAL pNew;
798	int rc;
799
800	/* sanity checks. */
801	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
802	*pMemObj = NIL_RTR0MEMOBJ;
803	AssertPtrReturn(MemObjToMap, VERR_INVALID_HANDLE);
804	pMemToMap = (PRTR0MEMOBJINTERNAL)MemObjToMap;
805	AssertReturn(pMemToMap->u32Magic == RTR0MEMOBJ_MAGIC, VERR_INVALID_HANDLE);
806	AssertReturn(pMemToMap->enmType > RTR0MEMOBJTYPE_INVALID && pMemToMap->enmType < RTR0MEMOBJTYPE_END, VERR_INVALID_HANDLE);
807	AssertReturn(!rtR0MemObjIsMapping(pMemToMap), VERR_INVALID_PARAMETER);
808	AssertReturn(pMemToMap->enmType != RTR0MEMOBJTYPE_RES_VIRT, VERR_INVALID_PARAMETER);
809	if (uAlignment == 0)
810	uAlignment = PAGE_SIZE;
811	AssertReturn(uAlignment == PAGE_SIZE \|\| uAlignment == _2M \|\| uAlignment == _4M, VERR_INVALID_PARAMETER);
812	if (pvFixed != (void *)-1)
813	AssertReturn(!((uintptr_t)pvFixed & (uAlignment - 1)), VERR_INVALID_PARAMETER);
814	AssertReturn(fProt != RTMEM_PROT_NONE, VERR_INVALID_PARAMETER);
815	AssertReturn(!(fProt & ~(RTMEM_PROT_READ \| RTMEM_PROT_WRITE \| RTMEM_PROT_EXEC)), VERR_INVALID_PARAMETER);
816	AssertReturn(!(offSub & PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER);
817	AssertReturn(offSub < pMemToMap->cb, VERR_INVALID_PARAMETER);
818	AssertReturn(!(cbSub & PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER);
819	AssertReturn(cbSub <= pMemToMap->cb, VERR_INVALID_PARAMETER);
820	AssertReturn((!offSub && !cbSub) \|\| (offSub + cbSub) <= pMemToMap->cb, VERR_INVALID_PARAMETER);
821	RT_ASSERT_PREEMPTIBLE();
822
823	/* adjust the request to simplify the native code. */
824	if (offSub == 0 && cbSub == pMemToMap->cb)
825	cbSub = 0;
826
827	/* do the mapping. */
828	rc = rtR0MemObjNativeMapKernel(&pNew, pMemToMap, pvFixed, uAlignment, fProt, offSub, cbSub);
829	if (RT_SUCCESS(rc))
830	{
831	/* link it. */
832	rc = rtR0MemObjLink(pMemToMap, pNew);
833	if (RT_SUCCESS(rc))
834	*pMemObj = pNew;
835	else
836	{
837	/* damn, out of memory. bail out. */
838	int rc2 = rtR0MemObjNativeFree(pNew);
839	AssertRC(rc2);
840	pNew->u32Magic++;
841	pNew->enmType = RTR0MEMOBJTYPE_END;
842	RTMemFree(pNew);
843	}
844	}
845
846	return rc;
847	}
848	RT_EXPORT_SYMBOL(RTR0MemObjMapKernelEx);
849
850
851	/**
852	* Maps a memory object into user virtual address space in the current process.
853	*
854	* @returns IPRT status code.
855	* @param pMemObj Where to store the ring-0 memory object handle of the mapping object.
856	* @param MemObjToMap The object to be map.
857	* @param R3PtrFixed Requested address. (RTR3PTR)-1 means any address. This must match the alignment.
858	* @param uAlignment The alignment of the reserved memory.
859	* Supported values are 0 (alias for PAGE_SIZE), PAGE_SIZE, _2M and _4M.
860	* @param fProt Combination of RTMEM_PROT_* flags (except RTMEM_PROT_NONE).
861	* @param R0Process The process to map the memory into. NIL_RTR0PROCESS is an alias for the current one.
862	*/
863	RTR0DECL(int) RTR0MemObjMapUser(PRTR0MEMOBJ pMemObj, RTR0MEMOBJ MemObjToMap, RTR3PTR R3PtrFixed, size_t uAlignment, unsigned fProt, RTR0PROCESS R0Process)
864	{
865	/* sanity checks. */
866	PRTR0MEMOBJINTERNAL pMemToMap;
867	PRTR0MEMOBJINTERNAL pNew;
868	int rc;
869	AssertPtrReturn(pMemObj, VERR_INVALID_POINTER);
870	pMemToMap = (PRTR0MEMOBJINTERNAL)MemObjToMap;
871	*pMemObj = NIL_RTR0MEMOBJ;
872	AssertPtrReturn(MemObjToMap, VERR_INVALID_HANDLE);
873	AssertReturn(pMemToMap->u32Magic == RTR0MEMOBJ_MAGIC, VERR_INVALID_HANDLE);
874	AssertReturn(pMemToMap->enmType > RTR0MEMOBJTYPE_INVALID && pMemToMap->enmType < RTR0MEMOBJTYPE_END, VERR_INVALID_HANDLE);
875	AssertReturn(!rtR0MemObjIsMapping(pMemToMap), VERR_INVALID_PARAMETER);
876	AssertReturn(pMemToMap->enmType != RTR0MEMOBJTYPE_RES_VIRT, VERR_INVALID_PARAMETER);
877	if (uAlignment == 0)
878	uAlignment = PAGE_SIZE;
879	AssertReturn(uAlignment == PAGE_SIZE \|\| uAlignment == _2M \|\| uAlignment == _4M, VERR_INVALID_PARAMETER);
880	if (R3PtrFixed != (RTR3PTR)-1)
881	AssertReturn(!(R3PtrFixed & (uAlignment - 1)), VERR_INVALID_PARAMETER);
882	AssertReturn(fProt != RTMEM_PROT_NONE, VERR_INVALID_PARAMETER);
883	AssertReturn(!(fProt & ~(RTMEM_PROT_READ \| RTMEM_PROT_WRITE \| RTMEM_PROT_EXEC)), VERR_INVALID_PARAMETER);
884	if (R0Process == NIL_RTR0PROCESS)
885	R0Process = RTR0ProcHandleSelf();
886	RT_ASSERT_PREEMPTIBLE();
887
888	/* do the mapping. */
889	rc = rtR0MemObjNativeMapUser(&pNew, pMemToMap, R3PtrFixed, uAlignment, fProt, R0Process);
890	if (RT_SUCCESS(rc))
891	{
892	/* link it. */
893	rc = rtR0MemObjLink(pMemToMap, pNew);
894	if (RT_SUCCESS(rc))
895	*pMemObj = pNew;
896	else
897	{
898	/* damn, out of memory. bail out. */
899	int rc2 = rtR0MemObjNativeFree(pNew);
900	AssertRC(rc2);
901	pNew->u32Magic++;
902	pNew->enmType = RTR0MEMOBJTYPE_END;
903	RTMemFree(pNew);
904	}
905	}
906
907	return rc;
908	}
909	RT_EXPORT_SYMBOL(RTR0MemObjMapUser);
910
911
912	RTR0DECL(int) RTR0MemObjProtect(RTR0MEMOBJ hMemObj, size_t offSub, size_t cbSub, uint32_t fProt)
913	{
914	PRTR0MEMOBJINTERNAL pMemObj;
915	int rc;
916
917	/* sanity checks. */
918	pMemObj = (PRTR0MEMOBJINTERNAL)hMemObj;
919	AssertPtrReturn(pMemObj, VERR_INVALID_HANDLE);
920	AssertReturn(pMemObj->u32Magic == RTR0MEMOBJ_MAGIC, VERR_INVALID_HANDLE);
921	AssertReturn(pMemObj->enmType > RTR0MEMOBJTYPE_INVALID && pMemObj->enmType < RTR0MEMOBJTYPE_END, VERR_INVALID_HANDLE);
922	AssertReturn(rtR0MemObjIsProtectable(pMemObj), VERR_INVALID_PARAMETER);
923	AssertReturn(!(offSub & PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER);
924	AssertReturn(offSub < pMemObj->cb, VERR_INVALID_PARAMETER);
925	AssertReturn(!(cbSub & PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER);
926	AssertReturn(cbSub <= pMemObj->cb, VERR_INVALID_PARAMETER);
927	AssertReturn(offSub + cbSub <= pMemObj->cb, VERR_INVALID_PARAMETER);
928	AssertReturn(!(fProt & ~(RTMEM_PROT_NONE \| RTMEM_PROT_READ \| RTMEM_PROT_WRITE \| RTMEM_PROT_EXEC)), VERR_INVALID_PARAMETER);
929	RT_ASSERT_PREEMPTIBLE();
930
931	/* do the job */
932	rc = rtR0MemObjNativeProtect(pMemObj, offSub, cbSub, fProt);
933	if (RT_SUCCESS(rc))
934	pMemObj->fFlags \|= RTR0MEMOBJ_FLAGS_PROT_CHANGED; /* record it */
935
936	return rc;
937	}
938	RT_EXPORT_SYMBOL(RTR0MemObjProtect);
939

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source: vbox/trunk/src/VBox/Runtime/r0drv/memobj-r0drv.cpp@ 29027

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