memobj-r0drv-os2.cpp@ 91480

Last change on this file since 91480 was 91480, checked in by vboxsync, 3 years ago
IPRT/memobj: Passing pszTag around...
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1	/* $Id: memobj-r0drv-os2.cpp 91480 2021-09-29 23:52:11Z 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, NULL);
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) rtR0MemObjNativeAllocLarge(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, size_t cbLargePage, uint32_t fFlags,
169	const char *pszTag)
170	{
171	return rtR0MemObjFallbackAllocLarge(ppMem, cb, cbLargePage, fFlags, pszTag);
172	}
173
174
175	DECLHIDDEN(int) rtR0MemObjNativeAllocLow(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
176	{
177	NOREF(fExecutable);
178
179	/* create the object. */
180	const ULONG cPages = cb >> PAGE_SHIFT;
181	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF_DYN(RTR0MEMOBJOS2, aPages[cPages]),
182	RTR0MEMOBJTYPE_LOW, NULL, cb, NULL);
183	if (!pMemOs2)
184	return VERR_NO_MEMORY;
185
186	/* do the allocation. */
187	int rc = KernVMAlloc(cb, VMDHA_FIXED, &pMemOs2->Core.pv, (PPVOID)-1, NULL);
188	if (!rc)
189	{
190	ULONG cPagesRet = cPages;
191	rc = KernLinToPageList(pMemOs2->Core.pv, cb, &pMemOs2->aPages[0], &cPagesRet);
192	if (!rc)
193	{
194	rtR0MemObjFixPageList(&pMemOs2->aPages[0], cPages, cPagesRet);
195	*ppMem = &pMemOs2->Core;
196	return VINF_SUCCESS;
197	}
198	KernVMFree(pMemOs2->Core.pv);
199	}
200	rtR0MemObjDelete(&pMemOs2->Core);
201	rc = RTErrConvertFromOS2(rc);
202	return rc == VERR_NO_MEMORY ? VERR_NO_LOW_MEMORY : rc;
203	}
204
205
206	DECLHIDDEN(int) rtR0MemObjNativeAllocCont(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
207	{
208	NOREF(fExecutable);
209
210	/* create the object. */
211	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_CONT, NULL, cb, NULL);
212	if (!pMemOs2)
213	return VERR_NO_MEMORY;
214
215	/* do the allocation. */
216	ULONG ulPhys = ~0UL;
217	int rc = KernVMAlloc(cb, VMDHA_FIXED \| VMDHA_CONTIG, &pMemOs2->Core.pv, (PPVOID)&ulPhys, NULL);
218	if (!rc)
219	{
220	Assert(ulPhys != ~0UL);
221	pMemOs2->Core.u.Cont.Phys = ulPhys;
222	*ppMem = &pMemOs2->Core;
223	return VINF_SUCCESS;
224	}
225	rtR0MemObjDelete(&pMemOs2->Core);
226	return RTErrConvertFromOS2(rc);
227	}
228
229
230	DECLHIDDEN(int) rtR0MemObjNativeAllocPhys(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest, size_t uAlignment)
231	{
232	AssertMsgReturn(PhysHighest >= 16 *_1M, ("PhysHigest=%RHp\n", PhysHighest), VERR_NOT_SUPPORTED);
233
234	/** @todo alignment */
235	if (uAlignment != PAGE_SIZE)
236	return VERR_NOT_SUPPORTED;
237
238	/* create the object. */
239	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_PHYS, NULL, cb, NULL);
240	if (!pMemOs2)
241	return VERR_NO_MEMORY;
242
243	/* do the allocation. */
244	ULONG ulPhys = ~0UL;
245	int rc = KernVMAlloc(cb, VMDHA_FIXED \| VMDHA_CONTIG \| (PhysHighest < _4G ? VMDHA_16M : 0), &pMemOs2->Core.pv, (PPVOID)&ulPhys, NULL);
246	if (!rc)
247	{
248	Assert(ulPhys != ~0UL);
249	pMemOs2->Core.u.Phys.fAllocated = true;
250	pMemOs2->Core.u.Phys.PhysBase = ulPhys;
251	*ppMem = &pMemOs2->Core;
252	return VINF_SUCCESS;
253	}
254	rtR0MemObjDelete(&pMemOs2->Core);
255	return RTErrConvertFromOS2(rc);
256	}
257
258
259	DECLHIDDEN(int) rtR0MemObjNativeAllocPhysNC(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest)
260	{
261	/** @todo rtR0MemObjNativeAllocPhys / darwin. */
262	return rtR0MemObjNativeAllocPhys(ppMem, cb, PhysHighest, PAGE_SIZE);
263	}
264
265
266	DECLHIDDEN(int) rtR0MemObjNativeEnterPhys(PPRTR0MEMOBJINTERNAL ppMem, RTHCPHYS Phys, size_t cb, uint32_t uCachePolicy,
267	const char *pszTag)
268	{
269	AssertReturn(uCachePolicy == RTMEM_CACHE_POLICY_DONT_CARE, VERR_NOT_SUPPORTED);
270
271	/* create the object. */
272	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_PHYS,
273	NULL, cb, pszTag);
274	if (!pMemOs2)
275	return VERR_NO_MEMORY;
276
277	/* there is no allocation here, right? it needs to be mapped somewhere first. */
278	pMemOs2->Core.u.Phys.fAllocated = false;
279	pMemOs2->Core.u.Phys.PhysBase = Phys;
280	pMemOs2->Core.u.Phys.uCachePolicy = uCachePolicy;
281	*ppMem = &pMemOs2->Core;
282	return VINF_SUCCESS;
283	}
284
285
286	DECLHIDDEN(int) rtR0MemObjNativeLockUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3Ptr, size_t cb, uint32_t fAccess,
287	RTR0PROCESS R0Process)
288	{
289	AssertMsgReturn(R0Process == RTR0ProcHandleSelf(), ("%p != %p\n", R0Process, RTR0ProcHandleSelf()), VERR_NOT_SUPPORTED);
290
291	/* create the object. */
292	const ULONG cPages = cb >> PAGE_SHIFT;
293	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF_DYN(RTR0MEMOBJOS2, aPages[cPages]),
294	RTR0MEMOBJTYPE_LOCK, (void *)R3Ptr, cb, NULL);
295	if (!pMemOs2)
296	return VERR_NO_MEMORY;
297
298	/* lock it. */
299	ULONG cPagesRet = cPages;
300	int rc = KernVMLock(VMDHL_LONG \| (fAccess & RTMEM_PROT_WRITE ? VMDHL_WRITE : 0),
301	(void *)R3Ptr, cb, &pMemOs2->Lock, &pMemOs2->aPages[0], &cPagesRet);
302	if (!rc)
303	{
304	rtR0MemObjFixPageList(&pMemOs2->aPages[0], cPages, cPagesRet);
305	Assert(cb == pMemOs2->Core.cb);
306	Assert(R3Ptr == (RTR3PTR)pMemOs2->Core.pv);
307	pMemOs2->Core.u.Lock.R0Process = R0Process;
308	*ppMem = &pMemOs2->Core;
309	return VINF_SUCCESS;
310	}
311	rtR0MemObjDelete(&pMemOs2->Core);
312	return RTErrConvertFromOS2(rc);
313	}
314
315
316	DECLHIDDEN(int) rtR0MemObjNativeLockKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pv, size_t cb, uint32_t fAccess)
317	{
318	/* create the object. */
319	const ULONG cPages = cb >> PAGE_SHIFT;
320	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF_DYN(RTR0MEMOBJOS2, aPages[cPages]),
321	RTR0MEMOBJTYPE_LOCK, pv, cb, NULL);
322	if (!pMemOs2)
323	return VERR_NO_MEMORY;
324
325	/* lock it. */
326	ULONG cPagesRet = cPages;
327	int rc = KernVMLock(VMDHL_LONG \| (fAccess & RTMEM_PROT_WRITE ? VMDHL_WRITE : 0),
328	pv, cb, &pMemOs2->Lock, &pMemOs2->aPages[0], &cPagesRet);
329	if (!rc)
330	{
331	rtR0MemObjFixPageList(&pMemOs2->aPages[0], cPages, cPagesRet);
332	pMemOs2->Core.u.Lock.R0Process = NIL_RTR0PROCESS;
333	*ppMem = &pMemOs2->Core;
334	return VINF_SUCCESS;
335	}
336	rtR0MemObjDelete(&pMemOs2->Core);
337	return RTErrConvertFromOS2(rc);
338	}
339
340
341	DECLHIDDEN(int) rtR0MemObjNativeReserveKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pvFixed, size_t cb, size_t uAlignment,
342	const char *pszTag)
343	{
344	RT_NOREF(ppMem, pvFixed, cb, uAlignment, pszTag);
345	return VERR_NOT_SUPPORTED;
346	}
347
348
349	DECLHIDDEN(int) rtR0MemObjNativeReserveUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3PtrFixed, size_t cb, size_t uAlignment,
350	RTR0PROCESS R0Process, const char *pszTag)
351	{
352	RT_NOREF(ppMem, R3PtrFixed, cb, uAlignment, R0Process, pszTag);
353	return VERR_NOT_SUPPORTED;
354	}
355
356
357	DECLHIDDEN(int) rtR0MemObjNativeMapKernel(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, void *pvFixed, size_t uAlignment,
358	unsigned fProt, size_t offSub, size_t cbSub, const char *pszTag)
359	{
360	AssertMsgReturn(pvFixed == (void *)-1, ("%p\n", pvFixed), VERR_NOT_SUPPORTED);
361
362	/*
363	* Check that the specified alignment is supported.
364	*/
365	if (uAlignment > PAGE_SIZE)
366	return VERR_NOT_SUPPORTED;
367
368	/** @todo finish the implementation. */
369
370	int rc;
371	void *pvR0 = NULL;
372	PRTR0MEMOBJOS2 pMemToMapOs2 = (PRTR0MEMOBJOS2)pMemToMap;
373	switch (pMemToMapOs2->Core.enmType)
374	{
375	/*
376	* These has kernel mappings.
377	*/
378	case RTR0MEMOBJTYPE_PAGE:
379	case RTR0MEMOBJTYPE_LOW:
380	case RTR0MEMOBJTYPE_CONT:
381	pvR0 = pMemToMapOs2->Core.pv;
382	break;
383
384	case RTR0MEMOBJTYPE_PHYS:
385	pvR0 = pMemToMapOs2->Core.pv;
386	if (!pvR0)
387	{
388	/* no ring-0 mapping, so allocate a mapping in the process. */
389	AssertMsgReturn(fProt & RTMEM_PROT_WRITE, ("%#x\n", fProt), VERR_NOT_SUPPORTED);
390	Assert(!pMemToMapOs2->Core.u.Phys.fAllocated);
391	ULONG ulPhys = (ULONG)pMemToMapOs2->Core.u.Phys.PhysBase;
392	AssertReturn(ulPhys == pMemToMapOs2->Core.u.Phys.PhysBase, VERR_OUT_OF_RANGE);
393	rc = KernVMAlloc(pMemToMapOs2->Core.cb, VMDHA_PHYS, &pvR0, (PPVOID)&ulPhys, NULL);
394	if (rc)
395	return RTErrConvertFromOS2(rc);
396	pMemToMapOs2->Core.pv = pvR0;
397	}
398	break;
399
400	case RTR0MEMOBJTYPE_PHYS_NC:
401	AssertMsgFailed(("RTR0MEMOBJTYPE_PHYS_NC\n"));
402	return VERR_INTERNAL_ERROR_3;
403
404	case RTR0MEMOBJTYPE_LOCK:
405	if (pMemToMapOs2->Core.u.Lock.R0Process != NIL_RTR0PROCESS)
406	return VERR_NOT_SUPPORTED; /** @todo implement this... */
407	pvR0 = pMemToMapOs2->Core.pv;
408	break;
409
410	case RTR0MEMOBJTYPE_RES_VIRT:
411	case RTR0MEMOBJTYPE_MAPPING:
412	default:
413	AssertMsgFailed(("enmType=%d\n", pMemToMapOs2->Core.enmType));
414	return VERR_INTERNAL_ERROR;
415	}
416
417	/*
418	* Create a dummy mapping object for it.
419	*
420	* All mappings are read/write/execute in OS/2 and there isn't
421	* any cache options, so sharing is ok. And the main memory object
422	* isn't actually freed until all the mappings have been freed up
423	* (reference counting).
424	*/
425	if (!cbSub)
426	cbSub = pMemToMapOs2->Core.cb - offSub;
427	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_MAPPING,
428	(uint8_t *)pvR0 + offSub, cbSub, pszTag);
429	if (pMemOs2)
430	{
431	pMemOs2->Core.u.Mapping.R0Process = NIL_RTR0PROCESS;
432	*ppMem = &pMemOs2->Core;
433	return VINF_SUCCESS;
434	}
435	return VERR_NO_MEMORY;
436	}
437
438
439	DECLHIDDEN(int) rtR0MemObjNativeMapUser(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, RTR3PTR R3PtrFixed, size_t uAlignment,
440	unsigned fProt, RTR0PROCESS R0Process, size_t offSub, size_t cbSub, const char *pszTag)
441	{
442	AssertMsgReturn(R0Process == RTR0ProcHandleSelf(), ("%p != %p\n", R0Process, RTR0ProcHandleSelf()), VERR_NOT_SUPPORTED);
443	AssertMsgReturn(R3PtrFixed == (RTR3PTR)-1, ("%p\n", R3PtrFixed), VERR_NOT_SUPPORTED);
444	if (uAlignment > PAGE_SIZE)
445	return VERR_NOT_SUPPORTED;
446	AssertMsgReturn(!offSub && !cbSub, ("%#zx %#zx\n", offSub, cbSub), VERR_NOT_SUPPORTED); /** @todo implement sub maps */
447
448	int rc;
449	void *pvR0;
450	void *pvR3 = NULL;
451	PRTR0MEMOBJOS2 pMemToMapOs2 = (PRTR0MEMOBJOS2)pMemToMap;
452	switch (pMemToMapOs2->Core.enmType)
453	{
454	/*
455	* These has kernel mappings.
456	*/
457	case RTR0MEMOBJTYPE_PAGE:
458	case RTR0MEMOBJTYPE_LOW:
459	case RTR0MEMOBJTYPE_CONT:
460	pvR0 = pMemToMapOs2->Core.pv;
461	break;
462
463	case RTR0MEMOBJTYPE_PHYS:
464	pvR0 = pMemToMapOs2->Core.pv;
465	#if 0/* this is wrong. */
466	if (!pvR0)
467	{
468	/* no ring-0 mapping, so allocate a mapping in the process. */
469	AssertMsgReturn(fProt & RTMEM_PROT_WRITE, ("%#x\n", fProt), VERR_NOT_SUPPORTED);
470	Assert(!pMemToMapOs2->Core.u.Phys.fAllocated);
471	ULONG ulPhys = pMemToMapOs2->Core.u.Phys.PhysBase;
472	rc = KernVMAlloc(pMemToMapOs2->Core.cb, VMDHA_PHYS \| VMDHA_PROCESS, &pvR3, (PPVOID)&ulPhys, NULL);
473	if (rc)
474	return RTErrConvertFromOS2(rc);
475	}
476	break;
477	#endif
478	return VERR_NOT_SUPPORTED;
479
480	case RTR0MEMOBJTYPE_PHYS_NC:
481	AssertMsgFailed(("RTR0MEMOBJTYPE_PHYS_NC\n"));
482	return VERR_INTERNAL_ERROR_5;
483
484	case RTR0MEMOBJTYPE_LOCK:
485	if (pMemToMapOs2->Core.u.Lock.R0Process != NIL_RTR0PROCESS)
486	return VERR_NOT_SUPPORTED; /** @todo implement this... */
487	pvR0 = pMemToMapOs2->Core.pv;
488	break;
489
490	case RTR0MEMOBJTYPE_RES_VIRT:
491	case RTR0MEMOBJTYPE_MAPPING:
492	default:
493	AssertMsgFailed(("enmType=%d\n", pMemToMapOs2->Core.enmType));
494	return VERR_INTERNAL_ERROR;
495	}
496
497	/*
498	* Map the ring-0 memory into the current process.
499	*/
500	if (!pvR3)
501	{
502	Assert(pvR0);
503	ULONG flFlags = 0;
504	if (uAlignment == PAGE_SIZE)
505	flFlags \|= VMDHGP_4MB;
506	if (fProt & RTMEM_PROT_WRITE)
507	flFlags \|= VMDHGP_WRITE;
508	rc = RTR0Os2DHVMGlobalToProcess(flFlags, pvR0, pMemToMapOs2->Core.cb, &pvR3);
509	if (rc)
510	return RTErrConvertFromOS2(rc);
511	}
512	Assert(pvR3);
513
514	/*
515	* Create a mapping object for it.
516	*/
517	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_MAPPING,
518	pvR3, pMemToMapOs2->Core.cb, pszTag);
519	if (pMemOs2)
520	{
521	Assert(pMemOs2->Core.pv == pvR3);
522	pMemOs2->Core.u.Mapping.R0Process = R0Process;
523	*ppMem = &pMemOs2->Core;
524	return VINF_SUCCESS;
525	}
526	KernVMFree(pvR3);
527	return VERR_NO_MEMORY;
528	}
529
530
531	DECLHIDDEN(int) rtR0MemObjNativeProtect(PRTR0MEMOBJINTERNAL pMem, size_t offSub, size_t cbSub, uint32_t fProt)
532	{
533	NOREF(pMem);
534	NOREF(offSub);
535	NOREF(cbSub);
536	NOREF(fProt);
537	return VERR_NOT_SUPPORTED;
538	}
539
540
541	DECLHIDDEN(RTHCPHYS) rtR0MemObjNativeGetPagePhysAddr(PRTR0MEMOBJINTERNAL pMem, size_t iPage)
542	{
543	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)pMem;
544
545	switch (pMemOs2->Core.enmType)
546	{
547	case RTR0MEMOBJTYPE_PAGE:
548	case RTR0MEMOBJTYPE_LOW:
549	case RTR0MEMOBJTYPE_LOCK:
550	case RTR0MEMOBJTYPE_PHYS_NC:
551	return pMemOs2->aPages[iPage].Addr;
552
553	case RTR0MEMOBJTYPE_CONT:
554	return pMemOs2->Core.u.Cont.Phys + (iPage << PAGE_SHIFT);
555
556	case RTR0MEMOBJTYPE_PHYS:
557	return pMemOs2->Core.u.Phys.PhysBase + (iPage << PAGE_SHIFT);
558
559	case RTR0MEMOBJTYPE_RES_VIRT:
560	case RTR0MEMOBJTYPE_MAPPING:
561	default:
562	return NIL_RTHCPHYS;
563	}
564	}
565
566
567	/**
568	* Expands the page list so we can index pages directly.
569	*
570	* @param paPages The page list array to fix.
571	* @param cPages The number of pages that's supposed to go into the list.
572	* @param cPagesRet The actual number of pages in the list.
573	*/
574	static void rtR0MemObjFixPageList(KernPageList_t *paPages, ULONG cPages, ULONG cPagesRet)
575	{
576	Assert(cPages >= cPagesRet);
577	if (cPages != cPagesRet)
578	{
579	ULONG iIn = cPagesRet;
580	ULONG iOut = cPages;
581	do
582	{
583	iIn--;
584	iOut--;
585	Assert(iIn <= iOut);
586
587	KernPageList_t Page = paPages[iIn];
588	Assert(!(Page.Addr & PAGE_OFFSET_MASK));
589	Assert(Page.Size == RT_ALIGN_Z(Page.Size, PAGE_SIZE));
590
591	if (Page.Size > PAGE_SIZE)
592	{
593	do
594	{
595	Page.Size -= PAGE_SIZE;
596	paPages[iOut].Addr = Page.Addr + Page.Size;
597	paPages[iOut].Size = PAGE_SIZE;
598	iOut--;
599	} while (Page.Size > PAGE_SIZE);
600	}
601
602	paPages[iOut].Addr = Page.Addr;
603	paPages[iOut].Size = PAGE_SIZE;
604	} while ( iIn != iOut
605	&& iIn > 0);
606	}
607	}
608

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source: vbox/trunk/src/VBox/Runtime/r0drv/os2/memobj-r0drv-os2.cpp@ 91480

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