memobj-r0drv-os2.cpp@ 86728

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1	/* $Id: memobj-r0drv-os2.cpp 82968 2020-02-04 10:35:17Z vboxsync $ */
2	/** @file
3	* IPRT - Ring-0 Memory Objects, OS/2.
4	*/
5
6	/*
7	* Contributed by knut st. osmundsen.
8	*
9	* Copyright (C) 2007-2020 Oracle Corporation
10	*
11	* This file is part of VirtualBox Open Source Edition (OSE), as
12	* available from http://www.virtualbox.org. This file is free software;
13	* you can redistribute it and/or modify it under the terms of the GNU
14	* General Public License (GPL) as published by the Free Software
15	* Foundation, in version 2 as it comes in the "COPYING" file of the
16	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
17	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
18	*
19	* The contents of this file may alternatively be used under the terms
20	* of the Common Development and Distribution License Version 1.0
21	* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
22	* VirtualBox OSE distribution, in which case the provisions of the
23	* CDDL are applicable instead of those of the GPL.
24	*
25	* You may elect to license modified versions of this file under the
26	* terms and conditions of either the GPL or the CDDL or both.
27	* --------------------------------------------------------------------
28	*
29	* This code is based on:
30	*
31	* Copyright (c) 2007 knut st. osmundsen <[email protected]>
32	*
33	* Permission is hereby granted, free of charge, to any person
34	* obtaining a copy of this software and associated documentation
35	* files (the "Software"), to deal in the Software without
36	* restriction, including without limitation the rights to use,
37	* copy, modify, merge, publish, distribute, sublicense, and/or sell
38	* copies of the Software, and to permit persons to whom the
39	* Software is furnished to do so, subject to the following
40	* conditions:
41	*
42	* The above copyright notice and this permission notice shall be
43	* included in all copies or substantial portions of the Software.
44	*
45	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
46	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
47	* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
48	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
49	* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
50	* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
51	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
52	* OTHER DEALINGS IN THE SOFTWARE.
53	*/
54
55
56	/*********************************************************************************************************************************
57	* Header Files *
58	*********************************************************************************************************************************/
59	#include "the-os2-kernel.h"
60
61	#include <iprt/memobj.h>
62	#include <iprt/mem.h>
63	#include <iprt/err.h>
64	#include <iprt/assert.h>
65	#include <iprt/log.h>
66	#include <iprt/param.h>
67	#include <iprt/process.h>
68	#include "internal/memobj.h"
69
70
71	/*********************************************************************************************************************************
72	* Structures and Typedefs *
73	*********************************************************************************************************************************/
74	/**
75	* The OS/2 version of the memory object structure.
76	*/
77	typedef struct RTR0MEMOBJDARWIN
78	{
79	/** The core structure. */
80	RTR0MEMOBJINTERNAL Core;
81	/** Lock for the ring-3 / ring-0 pinned objectes.
82	* This member might not be allocated for some object types. */
83	KernVMLock_t Lock;
84	/** Array of physical pages.
85	* This array can be 0 in length for some object types. */
86	KernPageList_t aPages[1];
87	} RTR0MEMOBJOS2, *PRTR0MEMOBJOS2;
88
89
90	/*********************************************************************************************************************************
91	* Internal Functions *
92	*********************************************************************************************************************************/
93	static void rtR0MemObjFixPageList(KernPageList_t *paPages, ULONG cPages, ULONG cPagesRet);
94
95
96	DECLHIDDEN(int) rtR0MemObjNativeFree(RTR0MEMOBJ pMem)
97	{
98	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)pMem;
99	int rc;
100
101	switch (pMemOs2->Core.enmType)
102	{
103	case RTR0MEMOBJTYPE_PHYS_NC:
104	AssertMsgFailed(("RTR0MEMOBJTYPE_PHYS_NC\n"));
105	return VERR_INTERNAL_ERROR;
106
107	case RTR0MEMOBJTYPE_PHYS:
108	if (!pMemOs2->Core.pv)
109	break;
110
111	case RTR0MEMOBJTYPE_MAPPING:
112	if (pMemOs2->Core.u.Mapping.R0Process == NIL_RTR0PROCESS)
113	break;
114
115	RT_FALL_THRU();
116	case RTR0MEMOBJTYPE_PAGE:
117	case RTR0MEMOBJTYPE_LOW:
118	case RTR0MEMOBJTYPE_CONT:
119	rc = KernVMFree(pMemOs2->Core.pv);
120	AssertMsg(!rc, ("rc=%d type=%d pv=%p cb=%#zx\n", rc, pMemOs2->Core.enmType, pMemOs2->Core.pv, pMemOs2->Core.cb));
121	break;
122
123	case RTR0MEMOBJTYPE_LOCK:
124	rc = KernVMUnlock(&pMemOs2->Lock);
125	AssertMsg(!rc, ("rc=%d\n", rc));
126	break;
127
128	case RTR0MEMOBJTYPE_RES_VIRT:
129	default:
130	AssertMsgFailed(("enmType=%d\n", pMemOs2->Core.enmType));
131	return VERR_INTERNAL_ERROR;
132	}
133
134	return VINF_SUCCESS;
135	}
136
137
138	DECLHIDDEN(int) rtR0MemObjNativeAllocPage(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
139	{
140	NOREF(fExecutable);
141
142	/* create the object. */
143	const ULONG cPages = cb >> PAGE_SHIFT;
144	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF_DYN(RTR0MEMOBJOS2, aPages[cPages]),
145	RTR0MEMOBJTYPE_PAGE, NULL, cb);
146	if (!pMemOs2)
147	return VERR_NO_MEMORY;
148
149	/* do the allocation. */
150	int rc = KernVMAlloc(cb, VMDHA_FIXED, &pMemOs2->Core.pv, (PPVOID)-1, NULL);
151	if (!rc)
152	{
153	ULONG cPagesRet = cPages;
154	rc = KernLinToPageList(pMemOs2->Core.pv, cb, &pMemOs2->aPages[0], &cPagesRet);
155	if (!rc)
156	{
157	rtR0MemObjFixPageList(&pMemOs2->aPages[0], cPages, cPagesRet);
158	*ppMem = &pMemOs2->Core;
159	return VINF_SUCCESS;
160	}
161	KernVMFree(pMemOs2->Core.pv);
162	}
163	rtR0MemObjDelete(&pMemOs2->Core);
164	return RTErrConvertFromOS2(rc);
165	}
166
167
168	DECLHIDDEN(int) rtR0MemObjNativeAllocLow(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
169	{
170	NOREF(fExecutable);
171
172	/* create the object. */
173	const ULONG cPages = cb >> PAGE_SHIFT;
174	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF_DYN(RTR0MEMOBJOS2, aPages[cPages]),
175	RTR0MEMOBJTYPE_LOW, NULL, cb);
176	if (!pMemOs2)
177	return VERR_NO_MEMORY;
178
179	/* do the allocation. */
180	int rc = KernVMAlloc(cb, VMDHA_FIXED, &pMemOs2->Core.pv, (PPVOID)-1, NULL);
181	if (!rc)
182	{
183	ULONG cPagesRet = cPages;
184	rc = KernLinToPageList(pMemOs2->Core.pv, cb, &pMemOs2->aPages[0], &cPagesRet);
185	if (!rc)
186	{
187	rtR0MemObjFixPageList(&pMemOs2->aPages[0], cPages, cPagesRet);
188	*ppMem = &pMemOs2->Core;
189	return VINF_SUCCESS;
190	}
191	KernVMFree(pMemOs2->Core.pv);
192	}
193	rtR0MemObjDelete(&pMemOs2->Core);
194	rc = RTErrConvertFromOS2(rc);
195	return rc == VERR_NO_MEMORY ? VERR_NO_LOW_MEMORY : rc;
196	}
197
198
199	DECLHIDDEN(int) rtR0MemObjNativeAllocCont(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
200	{
201	NOREF(fExecutable);
202
203	/* create the object. */
204	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_CONT, NULL, cb);
205	if (!pMemOs2)
206	return VERR_NO_MEMORY;
207
208	/* do the allocation. */
209	ULONG ulPhys = ~0UL;
210	int rc = KernVMAlloc(cb, VMDHA_FIXED \| VMDHA_CONTIG, &pMemOs2->Core.pv, (PPVOID)&ulPhys, NULL);
211	if (!rc)
212	{
213	Assert(ulPhys != ~0UL);
214	pMemOs2->Core.u.Cont.Phys = ulPhys;
215	*ppMem = &pMemOs2->Core;
216	return VINF_SUCCESS;
217	}
218	rtR0MemObjDelete(&pMemOs2->Core);
219	return RTErrConvertFromOS2(rc);
220	}
221
222
223	DECLHIDDEN(int) rtR0MemObjNativeAllocPhys(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest, size_t uAlignment)
224	{
225	AssertMsgReturn(PhysHighest >= 16 *_1M, ("PhysHigest=%RHp\n", PhysHighest), VERR_NOT_SUPPORTED);
226
227	/** @todo alignment */
228	if (uAlignment != PAGE_SIZE)
229	return VERR_NOT_SUPPORTED;
230
231	/* create the object. */
232	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_PHYS, NULL, cb);
233	if (!pMemOs2)
234	return VERR_NO_MEMORY;
235
236	/* do the allocation. */
237	ULONG ulPhys = ~0UL;
238	int rc = KernVMAlloc(cb, VMDHA_FIXED \| VMDHA_CONTIG \| (PhysHighest < _4G ? VMDHA_16M : 0), &pMemOs2->Core.pv, (PPVOID)&ulPhys, NULL);
239	if (!rc)
240	{
241	Assert(ulPhys != ~0UL);
242	pMemOs2->Core.u.Phys.fAllocated = true;
243	pMemOs2->Core.u.Phys.PhysBase = ulPhys;
244	*ppMem = &pMemOs2->Core;
245	return VINF_SUCCESS;
246	}
247	rtR0MemObjDelete(&pMemOs2->Core);
248	return RTErrConvertFromOS2(rc);
249	}
250
251
252	DECLHIDDEN(int) rtR0MemObjNativeAllocPhysNC(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest)
253	{
254	/** @todo rtR0MemObjNativeAllocPhys / darwin. */
255	return rtR0MemObjNativeAllocPhys(ppMem, cb, PhysHighest, PAGE_SIZE);
256	}
257
258
259	DECLHIDDEN(int) rtR0MemObjNativeEnterPhys(PPRTR0MEMOBJINTERNAL ppMem, RTHCPHYS Phys, size_t cb, uint32_t uCachePolicy)
260	{
261	AssertReturn(uCachePolicy == RTMEM_CACHE_POLICY_DONT_CARE, VERR_NOT_SUPPORTED);
262
263	/* create the object. */
264	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_PHYS, NULL, cb);
265	if (!pMemOs2)
266	return VERR_NO_MEMORY;
267
268	/* there is no allocation here, right? it needs to be mapped somewhere first. */
269	pMemOs2->Core.u.Phys.fAllocated = false;
270	pMemOs2->Core.u.Phys.PhysBase = Phys;
271	pMemOs2->Core.u.Phys.uCachePolicy = uCachePolicy;
272	*ppMem = &pMemOs2->Core;
273	return VINF_SUCCESS;
274	}
275
276
277	DECLHIDDEN(int) rtR0MemObjNativeLockUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3Ptr, size_t cb, uint32_t fAccess,
278	RTR0PROCESS R0Process)
279	{
280	AssertMsgReturn(R0Process == RTR0ProcHandleSelf(), ("%p != %p\n", R0Process, RTR0ProcHandleSelf()), VERR_NOT_SUPPORTED);
281
282	/* create the object. */
283	const ULONG cPages = cb >> PAGE_SHIFT;
284	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF_DYN(RTR0MEMOBJOS2, aPages[cPages]),
285	RTR0MEMOBJTYPE_LOCK, (void *)R3Ptr, cb);
286	if (!pMemOs2)
287	return VERR_NO_MEMORY;
288
289	/* lock it. */
290	ULONG cPagesRet = cPages;
291	int rc = KernVMLock(VMDHL_LONG \| (fAccess & RTMEM_PROT_WRITE ? VMDHL_WRITE : 0),
292	(void *)R3Ptr, cb, &pMemOs2->Lock, &pMemOs2->aPages[0], &cPagesRet);
293	if (!rc)
294	{
295	rtR0MemObjFixPageList(&pMemOs2->aPages[0], cPages, cPagesRet);
296	Assert(cb == pMemOs2->Core.cb);
297	Assert(R3Ptr == (RTR3PTR)pMemOs2->Core.pv);
298	pMemOs2->Core.u.Lock.R0Process = R0Process;
299	*ppMem = &pMemOs2->Core;
300	return VINF_SUCCESS;
301	}
302	rtR0MemObjDelete(&pMemOs2->Core);
303	return RTErrConvertFromOS2(rc);
304	}
305
306
307	DECLHIDDEN(int) rtR0MemObjNativeLockKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pv, size_t cb, uint32_t fAccess)
308	{
309	/* create the object. */
310	const ULONG cPages = cb >> PAGE_SHIFT;
311	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF_DYN(RTR0MEMOBJOS2, aPages[cPages]),
312	RTR0MEMOBJTYPE_LOCK, pv, cb);
313	if (!pMemOs2)
314	return VERR_NO_MEMORY;
315
316	/* lock it. */
317	ULONG cPagesRet = cPages;
318	int rc = KernVMLock(VMDHL_LONG \| (fAccess & RTMEM_PROT_WRITE ? VMDHL_WRITE : 0),
319	pv, cb, &pMemOs2->Lock, &pMemOs2->aPages[0], &cPagesRet);
320	if (!rc)
321	{
322	rtR0MemObjFixPageList(&pMemOs2->aPages[0], cPages, cPagesRet);
323	pMemOs2->Core.u.Lock.R0Process = NIL_RTR0PROCESS;
324	*ppMem = &pMemOs2->Core;
325	return VINF_SUCCESS;
326	}
327	rtR0MemObjDelete(&pMemOs2->Core);
328	return RTErrConvertFromOS2(rc);
329	}
330
331
332	DECLHIDDEN(int) rtR0MemObjNativeReserveKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pvFixed, size_t cb, size_t uAlignment)
333	{
334	RT_NOREF(ppMem, pvFixed, cb, uAlignment);
335	return VERR_NOT_SUPPORTED;
336	}
337
338
339	DECLHIDDEN(int) rtR0MemObjNativeReserveUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3PtrFixed, size_t cb, size_t uAlignment,
340	RTR0PROCESS R0Process)
341	{
342	RT_NOREF(ppMem, R3PtrFixed, cb, uAlignment, R0Process);
343	return VERR_NOT_SUPPORTED;
344	}
345
346
347	DECLHIDDEN(int) rtR0MemObjNativeMapKernel(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, void *pvFixed, size_t uAlignment,
348	unsigned fProt, size_t offSub, size_t cbSub)
349	{
350	AssertMsgReturn(pvFixed == (void *)-1, ("%p\n", pvFixed), VERR_NOT_SUPPORTED);
351
352	/*
353	* Check that the specified alignment is supported.
354	*/
355	if (uAlignment > PAGE_SIZE)
356	return VERR_NOT_SUPPORTED;
357
358	/** @todo finish the implementation. */
359
360	int rc;
361	void *pvR0 = NULL;
362	PRTR0MEMOBJOS2 pMemToMapOs2 = (PRTR0MEMOBJOS2)pMemToMap;
363	switch (pMemToMapOs2->Core.enmType)
364	{
365	/*
366	* These has kernel mappings.
367	*/
368	case RTR0MEMOBJTYPE_PAGE:
369	case RTR0MEMOBJTYPE_LOW:
370	case RTR0MEMOBJTYPE_CONT:
371	pvR0 = pMemToMapOs2->Core.pv;
372	break;
373
374	case RTR0MEMOBJTYPE_PHYS:
375	pvR0 = pMemToMapOs2->Core.pv;
376	if (!pvR0)
377	{
378	/* no ring-0 mapping, so allocate a mapping in the process. */
379	AssertMsgReturn(fProt & RTMEM_PROT_WRITE, ("%#x\n", fProt), VERR_NOT_SUPPORTED);
380	Assert(!pMemToMapOs2->Core.u.Phys.fAllocated);
381	ULONG ulPhys = (ULONG)pMemToMapOs2->Core.u.Phys.PhysBase;
382	AssertReturn(ulPhys == pMemToMapOs2->Core.u.Phys.PhysBase, VERR_OUT_OF_RANGE);
383	rc = KernVMAlloc(pMemToMapOs2->Core.cb, VMDHA_PHYS, &pvR0, (PPVOID)&ulPhys, NULL);
384	if (rc)
385	return RTErrConvertFromOS2(rc);
386	pMemToMapOs2->Core.pv = pvR0;
387	}
388	break;
389
390	case RTR0MEMOBJTYPE_PHYS_NC:
391	AssertMsgFailed(("RTR0MEMOBJTYPE_PHYS_NC\n"));
392	return VERR_INTERNAL_ERROR_3;
393
394	case RTR0MEMOBJTYPE_LOCK:
395	if (pMemToMapOs2->Core.u.Lock.R0Process != NIL_RTR0PROCESS)
396	return VERR_NOT_SUPPORTED; /** @todo implement this... */
397	pvR0 = pMemToMapOs2->Core.pv;
398	break;
399
400	case RTR0MEMOBJTYPE_RES_VIRT:
401	case RTR0MEMOBJTYPE_MAPPING:
402	default:
403	AssertMsgFailed(("enmType=%d\n", pMemToMapOs2->Core.enmType));
404	return VERR_INTERNAL_ERROR;
405	}
406
407	/*
408	* Create a dummy mapping object for it.
409	*
410	* All mappings are read/write/execute in OS/2 and there isn't
411	* any cache options, so sharing is ok. And the main memory object
412	* isn't actually freed until all the mappings have been freed up
413	* (reference counting).
414	*/
415	if (!cbSub)
416	cbSub = pMemToMapOs2->Core.cb - offSub;
417	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_MAPPING,
418	(uint8_t *)pvR0 + offSub, cbSub);
419	if (pMemOs2)
420	{
421	pMemOs2->Core.u.Mapping.R0Process = NIL_RTR0PROCESS;
422	*ppMem = &pMemOs2->Core;
423	return VINF_SUCCESS;
424	}
425	return VERR_NO_MEMORY;
426	}
427
428
429	DECLHIDDEN(int) rtR0MemObjNativeMapUser(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, RTR3PTR R3PtrFixed, size_t uAlignment,
430	unsigned fProt, RTR0PROCESS R0Process, size_t offSub, size_t cbSub)
431	{
432	AssertMsgReturn(R0Process == RTR0ProcHandleSelf(), ("%p != %p\n", R0Process, RTR0ProcHandleSelf()), VERR_NOT_SUPPORTED);
433	AssertMsgReturn(R3PtrFixed == (RTR3PTR)-1, ("%p\n", R3PtrFixed), VERR_NOT_SUPPORTED);
434	if (uAlignment > PAGE_SIZE)
435	return VERR_NOT_SUPPORTED;
436	AssertMsgReturn(!offSub && !cbSub, ("%#zx %#zx\n", offSub, cbSub), VERR_NOT_SUPPORTED); /** @todo implement sub maps */
437
438	int rc;
439	void *pvR0;
440	void *pvR3 = NULL;
441	PRTR0MEMOBJOS2 pMemToMapOs2 = (PRTR0MEMOBJOS2)pMemToMap;
442	switch (pMemToMapOs2->Core.enmType)
443	{
444	/*
445	* These has kernel mappings.
446	*/
447	case RTR0MEMOBJTYPE_PAGE:
448	case RTR0MEMOBJTYPE_LOW:
449	case RTR0MEMOBJTYPE_CONT:
450	pvR0 = pMemToMapOs2->Core.pv;
451	break;
452
453	case RTR0MEMOBJTYPE_PHYS:
454	pvR0 = pMemToMapOs2->Core.pv;
455	#if 0/* this is wrong. */
456	if (!pvR0)
457	{
458	/* no ring-0 mapping, so allocate a mapping in the process. */
459	AssertMsgReturn(fProt & RTMEM_PROT_WRITE, ("%#x\n", fProt), VERR_NOT_SUPPORTED);
460	Assert(!pMemToMapOs2->Core.u.Phys.fAllocated);
461	ULONG ulPhys = pMemToMapOs2->Core.u.Phys.PhysBase;
462	rc = KernVMAlloc(pMemToMapOs2->Core.cb, VMDHA_PHYS \| VMDHA_PROCESS, &pvR3, (PPVOID)&ulPhys, NULL);
463	if (rc)
464	return RTErrConvertFromOS2(rc);
465	}
466	break;
467	#endif
468	return VERR_NOT_SUPPORTED;
469
470	case RTR0MEMOBJTYPE_PHYS_NC:
471	AssertMsgFailed(("RTR0MEMOBJTYPE_PHYS_NC\n"));
472	return VERR_INTERNAL_ERROR_5;
473
474	case RTR0MEMOBJTYPE_LOCK:
475	if (pMemToMapOs2->Core.u.Lock.R0Process != NIL_RTR0PROCESS)
476	return VERR_NOT_SUPPORTED; /** @todo implement this... */
477	pvR0 = pMemToMapOs2->Core.pv;
478	break;
479
480	case RTR0MEMOBJTYPE_RES_VIRT:
481	case RTR0MEMOBJTYPE_MAPPING:
482	default:
483	AssertMsgFailed(("enmType=%d\n", pMemToMapOs2->Core.enmType));
484	return VERR_INTERNAL_ERROR;
485	}
486
487	/*
488	* Map the ring-0 memory into the current process.
489	*/
490	if (!pvR3)
491	{
492	Assert(pvR0);
493	ULONG flFlags = 0;
494	if (uAlignment == PAGE_SIZE)
495	flFlags \|= VMDHGP_4MB;
496	if (fProt & RTMEM_PROT_WRITE)
497	flFlags \|= VMDHGP_WRITE;
498	rc = RTR0Os2DHVMGlobalToProcess(flFlags, pvR0, pMemToMapOs2->Core.cb, &pvR3);
499	if (rc)
500	return RTErrConvertFromOS2(rc);
501	}
502	Assert(pvR3);
503
504	/*
505	* Create a mapping object for it.
506	*/
507	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_MAPPING,
508	pvR3, pMemToMapOs2->Core.cb);
509	if (pMemOs2)
510	{
511	Assert(pMemOs2->Core.pv == pvR3);
512	pMemOs2->Core.u.Mapping.R0Process = R0Process;
513	*ppMem = &pMemOs2->Core;
514	return VINF_SUCCESS;
515	}
516	KernVMFree(pvR3);
517	return VERR_NO_MEMORY;
518	}
519
520
521	DECLHIDDEN(int) rtR0MemObjNativeProtect(PRTR0MEMOBJINTERNAL pMem, size_t offSub, size_t cbSub, uint32_t fProt)
522	{
523	NOREF(pMem);
524	NOREF(offSub);
525	NOREF(cbSub);
526	NOREF(fProt);
527	return VERR_NOT_SUPPORTED;
528	}
529
530
531	DECLHIDDEN(RTHCPHYS) rtR0MemObjNativeGetPagePhysAddr(PRTR0MEMOBJINTERNAL pMem, size_t iPage)
532	{
533	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)pMem;
534
535	switch (pMemOs2->Core.enmType)
536	{
537	case RTR0MEMOBJTYPE_PAGE:
538	case RTR0MEMOBJTYPE_LOW:
539	case RTR0MEMOBJTYPE_LOCK:
540	case RTR0MEMOBJTYPE_PHYS_NC:
541	return pMemOs2->aPages[iPage].Addr;
542
543	case RTR0MEMOBJTYPE_CONT:
544	return pMemOs2->Core.u.Cont.Phys + (iPage << PAGE_SHIFT);
545
546	case RTR0MEMOBJTYPE_PHYS:
547	return pMemOs2->Core.u.Phys.PhysBase + (iPage << PAGE_SHIFT);
548
549	case RTR0MEMOBJTYPE_RES_VIRT:
550	case RTR0MEMOBJTYPE_MAPPING:
551	default:
552	return NIL_RTHCPHYS;
553	}
554	}
555
556
557	/**
558	* Expands the page list so we can index pages directly.
559	*
560	* @param paPages The page list array to fix.
561	* @param cPages The number of pages that's supposed to go into the list.
562	* @param cPagesRet The actual number of pages in the list.
563	*/
564	static void rtR0MemObjFixPageList(KernPageList_t *paPages, ULONG cPages, ULONG cPagesRet)
565	{
566	Assert(cPages >= cPagesRet);
567	if (cPages != cPagesRet)
568	{
569	ULONG iIn = cPagesRet;
570	ULONG iOut = cPages;
571	do
572	{
573	iIn--;
574	iOut--;
575	Assert(iIn <= iOut);
576
577	KernPageList_t Page = paPages[iIn];
578	Assert(!(Page.Addr & PAGE_OFFSET_MASK));
579	Assert(Page.Size == RT_ALIGN_Z(Page.Size, PAGE_SIZE));
580
581	if (Page.Size > PAGE_SIZE)
582	{
583	do
584	{
585	Page.Size -= PAGE_SIZE;
586	paPages[iOut].Addr = Page.Addr + Page.Size;
587	paPages[iOut].Size = PAGE_SIZE;
588	iOut--;
589	} while (Page.Size > PAGE_SIZE);
590	}
591
592	paPages[iOut].Addr = Page.Addr;
593	paPages[iOut].Size = PAGE_SIZE;
594	} while ( iIn != iOut
595	&& iIn > 0);
596	}
597	}
598

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source: vbox/trunk/src/VBox/Runtime/r0drv/os2/memobj-r0drv-os2.cpp@ 86728

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