memobj-r0drv-darwin.cpp@ 43974

Last change on this file since 43974 was 43375, checked in by vboxsync, 12 years ago
memobj-r0drv-darwin.cpp: 10.8.2 fixes.
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File size: 43.8 KB

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1	/* $Id: memobj-r0drv-darwin.cpp 43375 2012-09-20 17:15:53Z vboxsync $ */
2	/** @file
3	* IPRT - Ring-0 Memory Objects, Darwin.
4	*/
5
6	/*
7	* Copyright (C) 2006-2012 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	#include "the-darwin-kernel.h"
32	#include "internal/iprt.h"
33	#include <iprt/memobj.h>
34
35	#include <iprt/asm.h>
36	#if defined(RT_ARCH_AMD64) \|\| defined(RT_ARCH_X86)
37	# include <iprt/x86.h>
38	# include <iprt/asm-amd64-x86.h>
39	#endif
40	#include <iprt/assert.h>
41	#include <iprt/log.h>
42	#include <iprt/mem.h>
43	#include <iprt/param.h>
44	#include <iprt/process.h>
45	#include <iprt/string.h>
46	#include <iprt/thread.h>
47	#include "internal/memobj.h"
48
49	/#define USE_VM_MAP_WIRE - may re-enable later when non-mapped allocations are added. /
50
51
52	/*******************************************************************************
53	* Structures and Typedefs *
54	*******************************************************************************/
55	/**
56	* The Darwin version of the memory object structure.
57	*/
58	typedef struct RTR0MEMOBJDARWIN
59	{
60	/** The core structure. */
61	RTR0MEMOBJINTERNAL Core;
62	/** Pointer to the memory descriptor created for allocated and locked memory. */
63	IOMemoryDescriptor *pMemDesc;
64	/** Pointer to the memory mapping object for mapped memory. */
65	IOMemoryMap *pMemMap;
66	} RTR0MEMOBJDARWIN, *PRTR0MEMOBJDARWIN;
67
68
69	/**
70	* Touch the pages to force the kernel to create or write-enable the page table
71	* entries.
72	*
73	* This is necessary since the kernel gets upset if we take a page fault when
74	* preemption is disabled and/or we own a simple lock (same thing). It has no
75	* problems with us disabling interrupts when taking the traps, weird stuff.
76	*
77	* (This is basically a way of invoking vm_fault on a range of pages.)
78	*
79	* @param pv Pointer to the first page.
80	* @param cb The number of bytes.
81	*/
82	static void rtR0MemObjDarwinTouchPages(void *pv, size_t cb)
83	{
84	uint32_t volatile pu32 = (uint32_t volatile )pv;
85	for (;;)
86	{
87	ASMAtomicCmpXchgU32(pu32, 0xdeadbeef, 0xdeadbeef);
88	if (cb <= PAGE_SIZE)
89	break;
90	cb -= PAGE_SIZE;
91	pu32 += PAGE_SIZE / sizeof(uint32_t);
92	}
93	}
94
95
96	/**
97	* Read (sniff) every page in the range to make sure there are some page tables
98	* entries backing it.
99	*
100	* This is just to be sure vm_protect didn't remove stuff without re-adding it
101	* if someone should try write-protect something.
102	*
103	* @param pv Pointer to the first page.
104	* @param cb The number of bytes.
105	*/
106	static void rtR0MemObjDarwinSniffPages(void const *pv, size_t cb)
107	{
108	uint32_t volatile pu32 = (uint32_t volatile )pv;
109	uint32_t volatile u32Counter = 0;
110	for (;;)
111	{
112	u32Counter += *pu32;
113
114	if (cb <= PAGE_SIZE)
115	break;
116	cb -= PAGE_SIZE;
117	pu32 += PAGE_SIZE / sizeof(uint32_t);
118	}
119	}
120
121
122	/**
123	* Gets the virtual memory map the specified object is mapped into.
124	*
125	* @returns VM map handle on success, NULL if no map.
126	* @param pMem The memory object.
127	*/
128	DECLINLINE(vm_map_t) rtR0MemObjDarwinGetMap(PRTR0MEMOBJINTERNAL pMem)
129	{
130	switch (pMem->enmType)
131	{
132	case RTR0MEMOBJTYPE_PAGE:
133	case RTR0MEMOBJTYPE_LOW:
134	case RTR0MEMOBJTYPE_CONT:
135	return kernel_map;
136
137	case RTR0MEMOBJTYPE_PHYS:
138	case RTR0MEMOBJTYPE_PHYS_NC:
139	return NULL; /* pretend these have no mapping atm. */
140
141	case RTR0MEMOBJTYPE_LOCK:
142	return pMem->u.Lock.R0Process == NIL_RTR0PROCESS
143	? kernel_map
144	: get_task_map((task_t)pMem->u.Lock.R0Process);
145
146	case RTR0MEMOBJTYPE_RES_VIRT:
147	return pMem->u.ResVirt.R0Process == NIL_RTR0PROCESS
148	? kernel_map
149	: get_task_map((task_t)pMem->u.ResVirt.R0Process);
150
151	case RTR0MEMOBJTYPE_MAPPING:
152	return pMem->u.Mapping.R0Process == NIL_RTR0PROCESS
153	? kernel_map
154	: get_task_map((task_t)pMem->u.Mapping.R0Process);
155
156	default:
157	return NULL;
158	}
159	}
160
161	#if 0 /* not necessary after all*/
162	/* My vm_map mockup. */
163	struct my_vm_map
164	{
165	struct { char pad[8]; } lock;
166	struct my_vm_map_header
167	{
168	struct vm_map_links
169	{
170	void *prev;
171	void *next;
172	vm_map_offset_t start;
173	vm_map_offset_t end;
174	} links;
175	int nentries;
176	boolean_t entries_pageable;
177	} hdr;
178	pmap_t pmap;
179	vm_map_size_t size;
180	};
181
182
183	/**
184	* Gets the minimum map address, this is similar to get_map_min.
185	*
186	* @returns The start address of the map.
187	* @param pMap The map.
188	*/
189	static vm_map_offset_t rtR0MemObjDarwinGetMapMin(vm_map_t pMap)
190	{
191	/* lazy discovery of the correct offset. The apple guys is a wonderfully secretive bunch. */
192	static int32_t volatile s_offAdjust = INT32_MAX;
193	int32_t off = s_offAdjust;
194	if (off == INT32_MAX)
195	{
196	for (off = 0; ; off += sizeof(pmap_t))
197	{
198	if ((pmap_t )((uint8_t *)kernel_map + off) == kernel_pmap)
199	break;
200	AssertReturn(off <= RT_MAX(RT_OFFSETOF(struct my_vm_map, pmap) * 4, 1024), 0x1000);
201	}
202	ASMAtomicWriteS32(&s_offAdjust, off - RT_OFFSETOF(struct my_vm_map, pmap));
203	}
204
205	/* calculate it. */
206	struct my_vm_map pMyMap = (struct my_vm_map )((uint8_t *)pMap + off);
207	return pMyMap->hdr.links.start;
208	}
209	#endif /* unused */
210
211	#ifdef RT_STRICT
212
213	/**
214	* Read from a physical page.
215	*
216	* @param HCPhys The address to start reading at.
217	* @param cb How many bytes to read.
218	* @param pvDst Where to put the bytes. This is zero'd on failure.
219	*/
220	static void rtR0MemObjDarwinReadPhys(RTHCPHYS HCPhys, size_t cb, void *pvDst)
221	{
222	memset(pvDst, '\0', cb);
223
224	IOAddressRange aRanges[1] = { { (mach_vm_address_t)HCPhys, RT_ALIGN_Z(cb, PAGE_SIZE) } };
225	IOMemoryDescriptor *pMemDesc = IOMemoryDescriptor::withAddressRanges(&aRanges[0], RT_ELEMENTS(aRanges),
226	kIODirectionIn, NULL /task/);
227	if (pMemDesc)
228	{
229	#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1050
230	IOMemoryMap *pMemMap = pMemDesc->createMappingInTask(kernel_task, 0, kIOMapAnywhere \| kIOMapDefaultCache);
231	#else
232	IOMemoryMap *pMemMap = pMemDesc->map(kernel_task, 0, kIOMapAnywhere \| kIOMapDefaultCache);
233	#endif
234	if (pMemMap)
235	{
236	void const pvSrc = (void const )(uintptr_t)pMemMap->getVirtualAddress();
237	memcpy(pvDst, pvSrc, cb);
238	pMemMap->release();
239	}
240	else
241	printf("rtR0MemObjDarwinReadPhys: createMappingInTask failed; HCPhys=%llx\n", HCPhys);
242
243	pMemDesc->release();
244	}
245	else
246	printf("rtR0MemObjDarwinReadPhys: withAddressRanges failed; HCPhys=%llx\n", HCPhys);
247	}
248
249
250	/**
251	* Gets the PTE for a page.
252	*
253	* @returns the PTE.
254	* @param pvPage The virtual address to get the PTE for.
255	*/
256	static uint64_t rtR0MemObjDarwinGetPTE(void *pvPage)
257	{
258	RTUINT64U u64;
259	RTCCUINTREG cr3 = ASMGetCR3();
260	RTCCUINTREG cr4 = ASMGetCR4();
261	bool fPAE = false;
262	bool fLMA = false;
263	if (cr4 & X86_CR4_PAE)
264	{
265	fPAE = true;
266	uint32_t fExtFeatures = ASMCpuId_EDX(0x80000001);
267	if (fExtFeatures & X86_CPUID_EXT_FEATURE_EDX_LONG_MODE)
268	{
269	uint64_t efer = ASMRdMsr(MSR_K6_EFER);
270	if (efer & MSR_K6_EFER_LMA)
271	fLMA = true;
272	}
273	}
274
275	if (fLMA)
276	{
277	/* PML4 */
278	rtR0MemObjDarwinReadPhys((cr3 & ~(RTCCUINTREG)PAGE_OFFSET_MASK) \| (((uint64_t)(uintptr_t)pvPage >> X86_PML4_SHIFT) & X86_PML4_MASK) * 8, 8, &u64);
279	if (!(u64.u & X86_PML4E_P))
280	{
281	printf("rtR0MemObjDarwinGetPTE: %p -> PML4E !p\n", pvPage);
282	return 0;
283	}
284
285	/* PDPTR */
286	rtR0MemObjDarwinReadPhys((u64.u & ~(uint64_t)PAGE_OFFSET_MASK) \| (((uintptr_t)pvPage >> X86_PDPT_SHIFT) & X86_PDPT_MASK_AMD64) * 8, 8, &u64);
287	if (!(u64.u & X86_PDPE_P))
288	{
289	printf("rtR0MemObjDarwinGetPTE: %p -> PDPTE !p\n", pvPage);
290	return 0;
291	}
292	if (u64.u & X86_PDPE_LM_PS)
293	return (u64.u & ~(uint64_t)(_1G -1)) \| ((uintptr_t)pvPage & (_1G -1));
294
295	/* PD */
296	rtR0MemObjDarwinReadPhys((u64.u & ~(uint64_t)PAGE_OFFSET_MASK) \| (((uintptr_t)pvPage >> X86_PD_PAE_SHIFT) & X86_PD_PAE_MASK) * 8, 8, &u64);
297	if (!(u64.u & X86_PDE_P))
298	{
299	printf("rtR0MemObjDarwinGetPTE: %p -> PDE !p\n", pvPage);
300	return 0;
301	}
302	if (u64.u & X86_PDE_PS)
303	return (u64.u & ~(uint64_t)(_2M -1)) \| ((uintptr_t)pvPage & (_2M -1));
304
305	/* PT */
306	rtR0MemObjDarwinReadPhys((u64.u & ~(uint64_t)PAGE_OFFSET_MASK) \| (((uintptr_t)pvPage >> X86_PT_PAE_SHIFT) & X86_PT_PAE_MASK) * 8, 8, &u64);
307	if (!(u64.u & X86_PTE_P))
308	{
309	printf("rtR0MemObjDarwinGetPTE: %p -> PTE !p\n", pvPage);
310	return 0;
311	}
312	return u64.u;
313	}
314
315	if (fPAE)
316	{
317	/* PDPTR */
318	rtR0MemObjDarwinReadPhys((u64.u & X86_CR3_PAE_PAGE_MASK) \| (((uintptr_t)pvPage >> X86_PDPT_SHIFT) & X86_PDPT_MASK_PAE) * 8, 8, &u64);
319	if (!(u64.u & X86_PDE_P))
320	return 0;
321
322	/* PD */
323	rtR0MemObjDarwinReadPhys((u64.u & ~(uint64_t)PAGE_OFFSET_MASK) \| (((uintptr_t)pvPage >> X86_PD_PAE_SHIFT) & X86_PD_PAE_MASK) * 8, 8, &u64);
324	if (!(u64.u & X86_PDE_P))
325	return 0;
326	if (u64.u & X86_PDE_PS)
327	return (u64.u & ~(uint64_t)(_2M -1)) \| ((uintptr_t)pvPage & (_2M -1));
328
329	/* PT */
330	rtR0MemObjDarwinReadPhys((u64.u & ~(uint64_t)PAGE_OFFSET_MASK) \| (((uintptr_t)pvPage >> X86_PT_PAE_SHIFT) & X86_PT_PAE_MASK) * 8, 8, &u64);
331	if (!(u64.u & X86_PTE_P))
332	return 0;
333	return u64.u;
334	}
335
336	/* PD */
337	rtR0MemObjDarwinReadPhys((u64.au32[0] & ~(uint32_t)PAGE_OFFSET_MASK) \| (((uintptr_t)pvPage >> X86_PD_SHIFT) & X86_PD_MASK) * 4, 4, &u64);
338	if (!(u64.au32[0] & X86_PDE_P))
339	return 0;
340	if (u64.au32[0] & X86_PDE_PS)
341	return (u64.u & ~(uint64_t)(_2M -1)) \| ((uintptr_t)pvPage & (_2M -1));
342
343	/* PT */
344	rtR0MemObjDarwinReadPhys((u64.au32[0] & ~(uint32_t)PAGE_OFFSET_MASK) \| (((uintptr_t)pvPage >> X86_PT_SHIFT) & X86_PT_MASK) * 4, 4, &u64);
345	if (!(u64.au32[0] & X86_PTE_P))
346	return 0;
347	return u64.au32[0];
348
349	return 0;
350	}
351
352	#endif /* RT_STRICT */
353
354	DECLHIDDEN(int) rtR0MemObjNativeFree(RTR0MEMOBJ pMem)
355	{
356	PRTR0MEMOBJDARWIN pMemDarwin = (PRTR0MEMOBJDARWIN)pMem;
357
358	/*
359	* Release the IOMemoryDescriptor or/and IOMemoryMap associated with the object.
360	*/
361	if (pMemDarwin->pMemDesc)
362	{
363	pMemDarwin->pMemDesc->complete();
364	pMemDarwin->pMemDesc->release();
365	pMemDarwin->pMemDesc = NULL;
366	}
367
368	if (pMemDarwin->pMemMap)
369	{
370	pMemDarwin->pMemMap->release();
371	pMemDarwin->pMemMap = NULL;
372	}
373
374	/*
375	* Release any memory that we've allocated or locked.
376	*/
377	switch (pMemDarwin->Core.enmType)
378	{
379	case RTR0MEMOBJTYPE_LOW:
380	case RTR0MEMOBJTYPE_PAGE:
381	case RTR0MEMOBJTYPE_CONT:
382	break;
383
384	case RTR0MEMOBJTYPE_LOCK:
385	{
386	#ifdef USE_VM_MAP_WIRE
387	vm_map_t Map = pMemDarwin->Core.u.Lock.R0Process != NIL_RTR0PROCESS
388	? get_task_map((task_t)pMemDarwin->Core.u.Lock.R0Process)
389	: kernel_map;
390	kern_return_t kr = vm_map_unwire(Map,
391	(vm_map_offset_t)pMemDarwin->Core.pv,
392	(vm_map_offset_t)pMemDarwin->Core.pv + pMemDarwin->Core.cb,
393	0 /* not user */);
394	AssertRC(kr == KERN_SUCCESS); /** @todo don't ignore... */
395	#endif
396	break;
397	}
398
399	case RTR0MEMOBJTYPE_PHYS:
400	/*if (pMemDarwin->Core.u.Phys.fAllocated)
401	IOFreePhysical(pMemDarwin->Core.u.Phys.PhysBase, pMemDarwin->Core.cb);*/
402	Assert(!pMemDarwin->Core.u.Phys.fAllocated);
403	break;
404
405	case RTR0MEMOBJTYPE_PHYS_NC:
406	AssertMsgFailed(("RTR0MEMOBJTYPE_PHYS_NC\n"));
407	return VERR_INTERNAL_ERROR;
408
409	case RTR0MEMOBJTYPE_RES_VIRT:
410	AssertMsgFailed(("RTR0MEMOBJTYPE_RES_VIRT\n"));
411	return VERR_INTERNAL_ERROR;
412
413	case RTR0MEMOBJTYPE_MAPPING:
414	/* nothing to do here. */
415	break;
416
417	default:
418	AssertMsgFailed(("enmType=%d\n", pMemDarwin->Core.enmType));
419	return VERR_INTERNAL_ERROR;
420	}
421
422	return VINF_SUCCESS;
423	}
424
425
426
427	/**
428	* Kernel memory alloc worker that uses inTaskWithPhysicalMask.
429	*
430	* @returns IPRT status code.
431	* @retval VERR_ADDRESS_TOO_BIG try another way.
432	*
433	* @param ppMem Where to return the memory object.
434	* @param cb The page aligned memory size.
435	* @param fExecutable Whether the mapping needs to be executable.
436	* @param fContiguous Whether the backing memory needs to be contiguous.
437	* @param PhysMask The mask for the backing memory (i.e. range). Use 0 if
438	* you don't care that much or is speculating.
439	* @param MaxPhysAddr The max address to verify the result against. Use
440	* UINT64_MAX if it doesn't matter.
441	* @param enmType The object type.
442	*/
443	static int rtR0MemObjNativeAllocWorker(PPRTR0MEMOBJINTERNAL ppMem, size_t cb,
444	bool fExecutable, bool fContiguous,
445	mach_vm_address_t PhysMask, uint64_t MaxPhysAddr,
446	RTR0MEMOBJTYPE enmType)
447	{
448	/*
449	* Try inTaskWithPhysicalMask first, but since we don't quite trust that it
450	* actually respects the physical memory mask (10.5.x is certainly busted),
451	* we'll use rtR0MemObjNativeAllocCont as a fallback for dealing with that.
452	*
453	* The kIOMemoryKernelUserShared flag just forces the result to be page aligned.
454	*
455	* The kIOMemoryMapperNone flag is required since 10.8.2 (IOMMU changes?).
456	*/
457	int rc;
458	size_t cbFudged = cb;
459	if (1) /** @todo Figure out why this is broken. Is it only on snow leopard? Seen allocating memory for the VM structure, last page corrupted or inaccessible. */
460	cbFudged += PAGE_SIZE;
461	#if 1
462	IOOptionBits fOptions = kIOMemoryKernelUserShared \| kIODirectionInOut;
463	if (fContiguous)
464	fOptions \|= kIOMemoryPhysicallyContiguous;
465	if (version_major >= 12 /* 12 = 10.8.x = Mountain Kitten */)
466	fOptions \|= kIOMemoryMapperNone;
467	IOBufferMemoryDescriptor *pMemDesc = IOBufferMemoryDescriptor::inTaskWithPhysicalMask(kernel_task, fOptions,
468	cbFudged, PhysMask);
469	#else /* Requires 10.7 SDK, but allows alignment to be specified: */
470	uint64_t uAlignment = PAGE_SIZE;
471	IOOptionBits fOptions = kIODirectionInOut \| kIOMemoryMapperNone;
472	if (fContiguous \|\| MaxPhysAddr < UINT64_MAX)
473	{
474	fOptions \|= kIOMemoryPhysicallyContiguous;
475	uAlignment = 1; /* PhysMask isn't respected if higher. */
476	}
477
478	IOBufferMemoryDescriptor *pMemDesc = new IOBufferMemoryDescriptor;
479	if (pMemDesc && !pMemDesc->initWithPhysicalMask(kernel_task, fOptions, cbFudged, uAlignment, PhysMask))
480	{
481	pMemDesc->release();
482	pMemDesc = NULL;
483	}
484	#endif
485	if (pMemDesc)
486	{
487	IOReturn IORet = pMemDesc->prepare(kIODirectionInOut);
488	if (IORet == kIOReturnSuccess)
489	{
490	void *pv = pMemDesc->getBytesNoCopy(0, cbFudged);
491	if (pv)
492	{
493	/*
494	* Check if it's all below 4GB.
495	*/
496	addr64_t AddrPrev = 0;
497	MaxPhysAddr &= ~(uint64_t)PAGE_OFFSET_MASK;
498	for (IOByteCount off = 0; off < cb; off += PAGE_SIZE)
499	{
500	#ifdef __LP64__
501	addr64_t Addr = pMemDesc->getPhysicalSegment(off, NULL, kIOMemoryMapperNone);
502	#else
503	addr64_t Addr = pMemDesc->getPhysicalSegment64(off, NULL);
504	#endif
505	if ( Addr > MaxPhysAddr
506	\|\| !Addr
507	\|\| (Addr & PAGE_OFFSET_MASK)
508	\|\| ( fContiguous
509	&& !off
510	&& Addr == AddrPrev + PAGE_SIZE))
511	{
512	/* Buggy API, try allocate the memory another way. */
513	pMemDesc->complete();
514	pMemDesc->release();
515	if (PhysMask)
516	LogRel(("rtR0MemObjNativeAllocWorker: off=%x Addr=%llx AddrPrev=%llx MaxPhysAddr=%llx PhysMas=%llx fContiguous=%RTbool fOptions=%#x - buggy API!\n",
517	off, Addr, AddrPrev, MaxPhysAddr, PhysMask, fContiguous, fOptions));
518	return VERR_ADDRESS_TOO_BIG;
519	}
520	AddrPrev = Addr;
521	}
522
523	#ifdef RT_STRICT
524	/* check that the memory is actually mapped. */
525	//addr64_t Addr = pMemDesc->getPhysicalSegment64(0, NULL);
526	//printf("rtR0MemObjNativeAllocWorker: pv=%p %8llx %8llx\n", pv, rtR0MemObjDarwinGetPTE(pv), Addr);
527	RTTHREADPREEMPTSTATE State = RTTHREADPREEMPTSTATE_INITIALIZER;
528	RTThreadPreemptDisable(&State);
529	rtR0MemObjDarwinTouchPages(pv, cb);
530	RTThreadPreemptRestore(&State);
531	#endif
532
533	/*
534	* Create the IPRT memory object.
535	*/
536	PRTR0MEMOBJDARWIN pMemDarwin = (PRTR0MEMOBJDARWIN)rtR0MemObjNew(sizeof(*pMemDarwin), enmType, pv, cb);
537	if (pMemDarwin)
538	{
539	if (fContiguous)
540	{
541	#ifdef __LP64__
542	addr64_t PhysBase64 = pMemDesc->getPhysicalSegment(0, NULL, kIOMemoryMapperNone);
543	#else
544	addr64_t PhysBase64 = pMemDesc->getPhysicalSegment64(0, NULL);
545	#endif
546	RTHCPHYS PhysBase = PhysBase64; Assert(PhysBase == PhysBase64);
547	if (enmType == RTR0MEMOBJTYPE_CONT)
548	pMemDarwin->Core.u.Cont.Phys = PhysBase;
549	else if (enmType == RTR0MEMOBJTYPE_PHYS)
550	pMemDarwin->Core.u.Phys.PhysBase = PhysBase;
551	else
552	AssertMsgFailed(("enmType=%d\n", enmType));
553	}
554
555	#if 1 /* Experimental code. */
556	if (fExecutable)
557	{
558	rc = rtR0MemObjNativeProtect(&pMemDarwin->Core, 0, cb, RTMEM_PROT_READ \| RTMEM_PROT_WRITE \| RTMEM_PROT_EXEC);
559	# ifdef RT_STRICT
560	/* check that the memory is actually mapped. */
561	RTTHREADPREEMPTSTATE State = RTTHREADPREEMPTSTATE_INITIALIZER;
562	RTThreadPreemptDisable(&State);
563	rtR0MemObjDarwinTouchPages(pv, cb);
564	RTThreadPreemptRestore(&State);
565	# endif
566
567	/* Bug 6226: Ignore KERN_PROTECTION_FAILURE on Leopard and older. */
568	if ( rc == VERR_PERMISSION_DENIED
569	&& version_major <= 10 /* 10 = 10.6.x = Snow Leopard. */)
570	rc = VINF_SUCCESS;
571	}
572	else
573	#endif
574	rc = VINF_SUCCESS;
575	if (RT_SUCCESS(rc))
576	{
577	pMemDarwin->pMemDesc = pMemDesc;
578	*ppMem = &pMemDarwin->Core;
579	return VINF_SUCCESS;
580	}
581
582	rtR0MemObjDelete(&pMemDarwin->Core);
583	}
584
585	if (enmType == RTR0MEMOBJTYPE_PHYS_NC)
586	rc = VERR_NO_PHYS_MEMORY;
587	else if (enmType == RTR0MEMOBJTYPE_LOW)
588	rc = VERR_NO_LOW_MEMORY;
589	else if (enmType == RTR0MEMOBJTYPE_CONT)
590	rc = VERR_NO_CONT_MEMORY;
591	else
592	rc = VERR_NO_MEMORY;
593	}
594	else
595	rc = VERR_MEMOBJ_INIT_FAILED;
596
597	pMemDesc->complete();
598	}
599	else
600	rc = RTErrConvertFromDarwinIO(IORet);
601	pMemDesc->release();
602	}
603	else
604	rc = VERR_MEMOBJ_INIT_FAILED;
605	Assert(rc != VERR_ADDRESS_TOO_BIG);
606	return rc;
607	}
608
609
610	DECLHIDDEN(int) rtR0MemObjNativeAllocPage(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
611	{
612	return rtR0MemObjNativeAllocWorker(ppMem, cb, fExecutable, false /* fContiguous */,
613	0 /* PhysMask */, UINT64_MAX, RTR0MEMOBJTYPE_PAGE);
614	}
615
616
617	DECLHIDDEN(int) rtR0MemObjNativeAllocLow(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
618	{
619	/*
620	* Try IOMallocPhysical/IOMallocAligned first.
621	* Then try optimistically without a physical address mask, which will always
622	* end up using IOMallocAligned.
623	*
624	* (See bug comment in the worker and IOBufferMemoryDescriptor::initWithPhysicalMask.)
625	*/
626	int rc = rtR0MemObjNativeAllocWorker(ppMem, cb, fExecutable, false /* fContiguous */,
627	~(uint32_t)PAGE_OFFSET_MASK, _4G - PAGE_SIZE, RTR0MEMOBJTYPE_LOW);
628	if (rc == VERR_ADDRESS_TOO_BIG)
629	rc = rtR0MemObjNativeAllocWorker(ppMem, cb, fExecutable, false /* fContiguous */,
630	0 /* PhysMask */, _4G - PAGE_SIZE, RTR0MEMOBJTYPE_LOW);
631	return rc;
632	}
633
634
635	DECLHIDDEN(int) rtR0MemObjNativeAllocCont(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
636	{
637	int rc = rtR0MemObjNativeAllocWorker(ppMem, cb, fExecutable, true /* fContiguous */,
638	~(uint32_t)PAGE_OFFSET_MASK, _4G - PAGE_SIZE,
639	RTR0MEMOBJTYPE_CONT);
640
641	/*
642	* Workaround for bogus IOKernelAllocateContiguous behavior, just in case.
643	* cb <= PAGE_SIZE allocations take a different path, using a different allocator.
644	*/
645	if (RT_FAILURE(rc) && cb <= PAGE_SIZE)
646	rc = rtR0MemObjNativeAllocWorker(ppMem, cb + PAGE_SIZE, fExecutable, true /* fContiguous */,
647	~(uint32_t)PAGE_OFFSET_MASK, _4G - PAGE_SIZE,
648	RTR0MEMOBJTYPE_CONT);
649	return rc;
650	}
651
652
653	DECLHIDDEN(int) rtR0MemObjNativeAllocPhys(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest, size_t uAlignment)
654	{
655	/** @todo alignment */
656	if (uAlignment != PAGE_SIZE)
657	return VERR_NOT_SUPPORTED;
658
659	/*
660	* Translate the PhysHighest address into a mask.
661	*/
662	int rc;
663	if (PhysHighest == NIL_RTHCPHYS)
664	rc = rtR0MemObjNativeAllocWorker(ppMem, cb, true /* fExecutable /, true / fContiguous */,
665	0 /* PhysMask*/, UINT64_MAX, RTR0MEMOBJTYPE_PHYS);
666	else
667	{
668	mach_vm_address_t PhysMask = 0;
669	PhysMask = ~(mach_vm_address_t)0;
670	while (PhysMask > (PhysHighest \| PAGE_OFFSET_MASK))
671	PhysMask >>= 1;
672	AssertReturn(PhysMask + 1 <= cb, VERR_INVALID_PARAMETER);
673	PhysMask &= ~(mach_vm_address_t)PAGE_OFFSET_MASK;
674
675	rc = rtR0MemObjNativeAllocWorker(ppMem, cb, true /* fExecutable /, true / fContiguous */,
676	PhysMask, PhysHighest, RTR0MEMOBJTYPE_PHYS);
677	}
678	return rc;
679	}
680
681
682	DECLHIDDEN(int) rtR0MemObjNativeAllocPhysNC(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest)
683	{
684	/** @todo rtR0MemObjNativeAllocPhys / darwin.
685	* This might be a bit problematic and may very well require having to create our own
686	* object which we populate with pages but without mapping it into any address space.
687	* Estimate is 2-3 days.
688	*/
689	return VERR_NOT_SUPPORTED;
690	}
691
692
693	DECLHIDDEN(int) rtR0MemObjNativeEnterPhys(PPRTR0MEMOBJINTERNAL ppMem, RTHCPHYS Phys, size_t cb, uint32_t uCachePolicy)
694	{
695	AssertReturn(uCachePolicy == RTMEM_CACHE_POLICY_DONT_CARE, VERR_NOT_SUPPORTED);
696
697	/*
698	* Create a descriptor for it (the validation is always true on intel macs, but
699	* as it doesn't harm us keep it in).
700	*/
701	int rc = VERR_ADDRESS_TOO_BIG;
702	IOAddressRange aRanges[1] = { { Phys, cb } };
703	if ( aRanges[0].address == Phys
704	&& aRanges[0].length == cb)
705	{
706	IOMemoryDescriptor *pMemDesc = IOMemoryDescriptor::withAddressRanges(&aRanges[0], RT_ELEMENTS(aRanges),
707	kIODirectionInOut, NULL /task/);
708	if (pMemDesc)
709	{
710	#ifdef __LP64__
711	Assert(Phys == pMemDesc->getPhysicalSegment(0, NULL, kIOMemoryMapperNone));
712	#else
713	Assert(Phys == pMemDesc->getPhysicalSegment64(0, NULL));
714	#endif
715
716	/*
717	* Create the IPRT memory object.
718	*/
719	PRTR0MEMOBJDARWIN pMemDarwin = (PRTR0MEMOBJDARWIN)rtR0MemObjNew(sizeof(*pMemDarwin), RTR0MEMOBJTYPE_PHYS, NULL, cb);
720	if (pMemDarwin)
721	{
722	pMemDarwin->Core.u.Phys.PhysBase = Phys;
723	pMemDarwin->Core.u.Phys.fAllocated = false;
724	pMemDarwin->Core.u.Phys.uCachePolicy = uCachePolicy;
725	pMemDarwin->pMemDesc = pMemDesc;
726	*ppMem = &pMemDarwin->Core;
727	return VINF_SUCCESS;
728	}
729
730	rc = VERR_NO_MEMORY;
731	pMemDesc->release();
732	}
733	else
734	rc = VERR_MEMOBJ_INIT_FAILED;
735	}
736	else
737	AssertMsgFailed(("%#llx %llx\n", (unsigned long long)Phys, (unsigned long long)cb));
738	return rc;
739	}
740
741
742	/**
743	* Internal worker for locking down pages.
744	*
745	* @return IPRT status code.
746	*
747	* @param ppMem Where to store the memory object pointer.
748	* @param pv First page.
749	* @param cb Number of bytes.
750	* @param fAccess The desired access, a combination of RTMEM_PROT_READ
751	* and RTMEM_PROT_WRITE.
752	* @param Task The task \a pv and \a cb refers to.
753	*/
754	static int rtR0MemObjNativeLock(PPRTR0MEMOBJINTERNAL ppMem, void *pv, size_t cb, uint32_t fAccess, task_t Task)
755	{
756	NOREF(fAccess);
757	#ifdef USE_VM_MAP_WIRE
758	vm_map_t Map = get_task_map(Task);
759	Assert(Map);
760
761	/*
762	* First try lock the memory.
763	*/
764	int rc = VERR_LOCK_FAILED;
765	kern_return_t kr = vm_map_wire(get_task_map(Task),
766	(vm_map_offset_t)pv,
767	(vm_map_offset_t)pv + cb,
768	VM_PROT_DEFAULT,
769	0 /* not user */);
770	if (kr == KERN_SUCCESS)
771	{
772	/*
773	* Create the IPRT memory object.
774	*/
775	PRTR0MEMOBJDARWIN pMemDarwin = (PRTR0MEMOBJDARWIN)rtR0MemObjNew(sizeof(*pMemDarwin), RTR0MEMOBJTYPE_LOCK, pv, cb);
776	if (pMemDarwin)
777	{
778	pMemDarwin->Core.u.Lock.R0Process = (RTR0PROCESS)Task;
779	*ppMem = &pMemDarwin->Core;
780	return VINF_SUCCESS;
781	}
782
783	kr = vm_map_unwire(get_task_map(Task), (vm_map_offset_t)pv, (vm_map_offset_t)pv + cb, 0 /* not user */);
784	Assert(kr == KERN_SUCCESS);
785	rc = VERR_NO_MEMORY;
786	}
787
788	#else
789
790	/*
791	* Create a descriptor and try lock it (prepare).
792	*/
793	int rc = VERR_MEMOBJ_INIT_FAILED;
794	IOMemoryDescriptor *pMemDesc = IOMemoryDescriptor::withAddressRange((vm_address_t)pv, cb, kIODirectionInOut, Task);
795	if (pMemDesc)
796	{
797	IOReturn IORet = pMemDesc->prepare(kIODirectionInOut);
798	if (IORet == kIOReturnSuccess)
799	{
800	/*
801	* Create the IPRT memory object.
802	*/
803	PRTR0MEMOBJDARWIN pMemDarwin = (PRTR0MEMOBJDARWIN)rtR0MemObjNew(sizeof(*pMemDarwin), RTR0MEMOBJTYPE_LOCK, pv, cb);
804	if (pMemDarwin)
805	{
806	pMemDarwin->Core.u.Lock.R0Process = (RTR0PROCESS)Task;
807	pMemDarwin->pMemDesc = pMemDesc;
808	*ppMem = &pMemDarwin->Core;
809	return VINF_SUCCESS;
810	}
811
812	pMemDesc->complete();
813	rc = VERR_NO_MEMORY;
814	}
815	else
816	rc = VERR_LOCK_FAILED;
817	pMemDesc->release();
818	}
819	#endif
820	return rc;
821	}
822
823
824	DECLHIDDEN(int) rtR0MemObjNativeLockUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3Ptr, size_t cb, uint32_t fAccess, RTR0PROCESS R0Process)
825	{
826	return rtR0MemObjNativeLock(ppMem, (void *)R3Ptr, cb, fAccess, (task_t)R0Process);
827	}
828
829
830	DECLHIDDEN(int) rtR0MemObjNativeLockKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pv, size_t cb, uint32_t fAccess)
831	{
832	return rtR0MemObjNativeLock(ppMem, pv, cb, fAccess, kernel_task);
833	}
834
835
836	DECLHIDDEN(int) rtR0MemObjNativeReserveKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pvFixed, size_t cb, size_t uAlignment)
837	{
838	return VERR_NOT_SUPPORTED;
839	}
840
841
842	DECLHIDDEN(int) rtR0MemObjNativeReserveUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3PtrFixed, size_t cb, size_t uAlignment, RTR0PROCESS R0Process)
843	{
844	return VERR_NOT_SUPPORTED;
845	}
846
847
848	DECLHIDDEN(int) rtR0MemObjNativeMapKernel(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, void *pvFixed, size_t uAlignment,
849	unsigned fProt, size_t offSub, size_t cbSub)
850	{
851	AssertReturn(pvFixed == (void *)-1, VERR_NOT_SUPPORTED);
852
853	/*
854	* Check that the specified alignment is supported.
855	*/
856	if (uAlignment > PAGE_SIZE)
857	return VERR_NOT_SUPPORTED;
858
859	/*
860	* Must have a memory descriptor that we can map.
861	*/
862	int rc = VERR_INVALID_PARAMETER;
863	PRTR0MEMOBJDARWIN pMemToMapDarwin = (PRTR0MEMOBJDARWIN)pMemToMap;
864	if (pMemToMapDarwin->pMemDesc)
865	{
866	#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1050
867	IOMemoryMap *pMemMap = pMemToMapDarwin->pMemDesc->createMappingInTask(kernel_task,
868	0,
869	kIOMapAnywhere \| kIOMapDefaultCache,
870	offSub,
871	cbSub);
872	#else
873	IOMemoryMap *pMemMap = pMemToMapDarwin->pMemDesc->map(kernel_task,
874	0,
875	kIOMapAnywhere \| kIOMapDefaultCache,
876	offSub,
877	cbSub);
878	#endif
879	if (pMemMap)
880	{
881	IOVirtualAddress VirtAddr = pMemMap->getVirtualAddress();
882	void pv = (void )(uintptr_t)VirtAddr;
883	if ((uintptr_t)pv == VirtAddr)
884	{
885	//addr64_t Addr = pMemToMapDarwin->pMemDesc->getPhysicalSegment64(offSub, NULL);
886	//printf("pv=%p: %8llx %8llx\n", pv, rtR0MemObjDarwinGetPTE(pv), Addr);
887
888	// /*
889	// * Explicitly lock it so that we're sure it is present and that
890	// * its PTEs cannot be recycled.
891	// * Note! withAddressRange() doesn't work as it adds kIOMemoryTypeVirtual64
892	// * to the options which causes prepare() to not wire the pages.
893	// * This is probably a bug.
894	// */
895	// IOAddressRange Range = { (mach_vm_address_t)pv, cbSub };
896	// IOMemoryDescriptor *pMemDesc = IOMemoryDescriptor::withOptions(&Range,
897	// 1 /* count */,
898	// 0 /* offset */,
899	// kernel_task,
900	// kIODirectionInOut \| kIOMemoryTypeVirtual,
901	// kIOMapperSystem);
902	// if (pMemDesc)
903	// {
904	// IOReturn IORet = pMemDesc->prepare(kIODirectionInOut);
905	// if (IORet == kIOReturnSuccess)
906	// {
907	/* HACK ALERT! */
908	rtR0MemObjDarwinTouchPages(pv, cbSub);
909	/** @todo First, the memory should've been mapped by now, and second, it
910	* should have the wired attribute in the PTE (bit 9). Neither
911	* seems to be the case. The disabled locking code doesn't make any
912	* difference, which is extremely odd, and breaks
913	* rtR0MemObjNativeGetPagePhysAddr (getPhysicalSegment64 -> 64 for the
914	* lock descriptor. */
915	//addr64_t Addr = pMemDesc->getPhysicalSegment64(0, NULL);
916	//printf("pv=%p: %8llx %8llx (%d)\n", pv, rtR0MemObjDarwinGetPTE(pv), Addr, 2);
917
918	/*
919	* Create the IPRT memory object.
920	*/
921	PRTR0MEMOBJDARWIN pMemDarwin = (PRTR0MEMOBJDARWIN)rtR0MemObjNew(sizeof(*pMemDarwin), RTR0MEMOBJTYPE_MAPPING,
922	pv, cbSub);
923	if (pMemDarwin)
924	{
925	pMemDarwin->Core.u.Mapping.R0Process = NIL_RTR0PROCESS;
926	pMemDarwin->pMemMap = pMemMap;
927	// pMemDarwin->pMemDesc = pMemDesc;
928	*ppMem = &pMemDarwin->Core;
929	return VINF_SUCCESS;
930	}
931
932	// pMemDesc->complete();
933	// rc = VERR_NO_MEMORY;
934	// }
935	// else
936	// rc = RTErrConvertFromDarwinIO(IORet);
937	// pMemDesc->release();
938	// }
939	// else
940	// rc = VERR_MEMOBJ_INIT_FAILED;
941	}
942	else
943	rc = VERR_ADDRESS_TOO_BIG;
944	pMemMap->release();
945	}
946	else
947	rc = VERR_MAP_FAILED;
948	}
949	return rc;
950	}
951
952
953	DECLHIDDEN(int) rtR0MemObjNativeMapUser(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, RTR3PTR R3PtrFixed, size_t uAlignment, unsigned fProt, RTR0PROCESS R0Process)
954	{
955	/*
956	* Check for unsupported things.
957	*/
958	AssertReturn(R3PtrFixed == (RTR3PTR)-1, VERR_NOT_SUPPORTED);
959	if (uAlignment > PAGE_SIZE)
960	return VERR_NOT_SUPPORTED;
961
962	/*
963	* Must have a memory descriptor.
964	*/
965	int rc = VERR_INVALID_PARAMETER;
966	PRTR0MEMOBJDARWIN pMemToMapDarwin = (PRTR0MEMOBJDARWIN)pMemToMap;
967	if (pMemToMapDarwin->pMemDesc)
968	{
969	#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1050
970	IOMemoryMap *pMemMap = pMemToMapDarwin->pMemDesc->createMappingInTask((task_t)R0Process,
971	0,
972	kIOMapAnywhere \| kIOMapDefaultCache,
973	0 /* offset */,
974	0 /* length */);
975	#else
976	IOMemoryMap *pMemMap = pMemToMapDarwin->pMemDesc->map((task_t)R0Process,
977	0,
978	kIOMapAnywhere \| kIOMapDefaultCache);
979	#endif
980	if (pMemMap)
981	{
982	IOVirtualAddress VirtAddr = pMemMap->getVirtualAddress();
983	void pv = (void )(uintptr_t)VirtAddr;
984	if ((uintptr_t)pv == VirtAddr)
985	{
986	/*
987	* Create the IPRT memory object.
988	*/
989	PRTR0MEMOBJDARWIN pMemDarwin = (PRTR0MEMOBJDARWIN)rtR0MemObjNew(sizeof(*pMemDarwin), RTR0MEMOBJTYPE_MAPPING,
990	pv, pMemToMapDarwin->Core.cb);
991	if (pMemDarwin)
992	{
993	pMemDarwin->Core.u.Mapping.R0Process = R0Process;
994	pMemDarwin->pMemMap = pMemMap;
995	*ppMem = &pMemDarwin->Core;
996	return VINF_SUCCESS;
997	}
998
999	rc = VERR_NO_MEMORY;
1000	}
1001	else
1002	rc = VERR_ADDRESS_TOO_BIG;
1003	pMemMap->release();
1004	}
1005	else
1006	rc = VERR_MAP_FAILED;
1007	}
1008	return rc;
1009	}
1010
1011
1012	DECLHIDDEN(int) rtR0MemObjNativeProtect(PRTR0MEMOBJINTERNAL pMem, size_t offSub, size_t cbSub, uint32_t fProt)
1013	{
1014	/* Get the map for the object. */
1015	vm_map_t pVmMap = rtR0MemObjDarwinGetMap(pMem);
1016	if (!pVmMap)
1017	return VERR_NOT_SUPPORTED;
1018
1019	/*
1020	* Convert the protection.
1021	*/
1022	vm_prot_t fMachProt;
1023	switch (fProt)
1024	{
1025	case RTMEM_PROT_NONE:
1026	fMachProt = VM_PROT_NONE;
1027	break;
1028	case RTMEM_PROT_READ:
1029	fMachProt = VM_PROT_READ;
1030	break;
1031	case RTMEM_PROT_READ \| RTMEM_PROT_WRITE:
1032	fMachProt = VM_PROT_READ \| VM_PROT_WRITE;
1033	break;
1034	case RTMEM_PROT_READ \| RTMEM_PROT_WRITE \| RTMEM_PROT_EXEC:
1035	fMachProt = VM_PROT_READ \| VM_PROT_WRITE \| VM_PROT_EXECUTE;
1036	break;
1037	case RTMEM_PROT_WRITE:
1038	fMachProt = VM_PROT_WRITE \| VM_PROT_READ; /* never write-only */
1039	break;
1040	case RTMEM_PROT_WRITE \| RTMEM_PROT_EXEC:
1041	fMachProt = VM_PROT_WRITE \| VM_PROT_EXECUTE \| VM_PROT_READ; /* never write-only or execute-only */
1042	break;
1043	case RTMEM_PROT_EXEC:
1044	fMachProt = VM_PROT_EXECUTE \| VM_PROT_READ; /* never execute-only */
1045	break;
1046	default:
1047	AssertFailedReturn(VERR_INVALID_PARAMETER);
1048	}
1049
1050	/*
1051	* Do the job.
1052	*/
1053	vm_offset_t Start = (uintptr_t)pMem->pv + offSub;
1054	kern_return_t krc = vm_protect(pVmMap,
1055	Start,
1056	cbSub,
1057	false,
1058	fMachProt);
1059	if (krc != KERN_SUCCESS)
1060	{
1061	static int s_cComplaints = 0;
1062	if (s_cComplaints < 10)
1063	{
1064	s_cComplaints++;
1065	printf("rtR0MemObjNativeProtect: vm_protect(%p,%p,%p,false,%#x) -> %d\n",
1066	pVmMap, (void )Start, (void )cbSub, fMachProt, krc);
1067
1068	kern_return_t krc2;
1069	vm_offset_t pvReal = Start;
1070	vm_size_t cbReal = 0;
1071	mach_msg_type_number_t cInfo = VM_REGION_BASIC_INFO_COUNT;
1072	struct vm_region_basic_info Info;
1073	RT_ZERO(Info);
1074	krc2 = vm_region(pVmMap, &pvReal, &cbReal, VM_REGION_BASIC_INFO, (vm_region_info_t)&Info, &cInfo, NULL);
1075	printf("rtR0MemObjNativeProtect: basic info - krc2=%d pv=%p cb=%p prot=%#x max=%#x inh=%#x shr=%d rvd=%d off=%#x behavior=%#x wired=%#x\n",
1076	krc2, (void )pvReal, (void )cbReal, Info.protection, Info.max_protection, Info.inheritance,
1077	Info.shared, Info.reserved, Info.offset, Info.behavior, Info.user_wired_count);
1078	}
1079	return RTErrConvertFromDarwinKern(krc);
1080	}
1081
1082	/*
1083	* Touch the pages if they should be writable afterwards and accessible
1084	* from code which should never fault. vm_protect() may leave pages
1085	* temporarily write protected, possibly due to pmap no-upgrade rules?
1086	*
1087	* This is the same trick (or HACK ALERT if you like) as applied in
1088	* rtR0MemObjNativeMapKernel.
1089	*/
1090	if ( pMem->enmType != RTR0MEMOBJTYPE_MAPPING
1091	\|\| pMem->u.Mapping.R0Process == NIL_RTR0PROCESS)
1092	{
1093	if (fProt & RTMEM_PROT_WRITE)
1094	rtR0MemObjDarwinTouchPages((void *)Start, cbSub);
1095	/*
1096	* Sniff (read) read-only pages too, just to be sure.
1097	*/
1098	else if (fProt & (RTMEM_PROT_READ \| RTMEM_PROT_EXEC))
1099	rtR0MemObjDarwinSniffPages((void const *)Start, cbSub);
1100	}
1101
1102	return VINF_SUCCESS;
1103	}
1104
1105
1106	DECLHIDDEN(RTHCPHYS) rtR0MemObjNativeGetPagePhysAddr(PRTR0MEMOBJINTERNAL pMem, size_t iPage)
1107	{
1108	RTHCPHYS PhysAddr;
1109	PRTR0MEMOBJDARWIN pMemDarwin = (PRTR0MEMOBJDARWIN)pMem;
1110
1111	#ifdef USE_VM_MAP_WIRE
1112	/*
1113	* Locked memory doesn't have a memory descriptor and
1114	* needs to be handled differently.
1115	*/
1116	if (pMemDarwin->Core.enmType == RTR0MEMOBJTYPE_LOCK)
1117	{
1118	ppnum_t PgNo;
1119	if (pMemDarwin->Core.u.Lock.R0Process == NIL_RTR0PROCESS)
1120	PgNo = pmap_find_phys(kernel_pmap, (uintptr_t)pMemDarwin->Core.pv + iPage * PAGE_SIZE);
1121	else
1122	{
1123	/*
1124	* From what I can tell, Apple seems to have locked up the all the
1125	* available interfaces that could help us obtain the pmap_t of a task
1126	* or vm_map_t.
1127
1128	* So, we'll have to figure out where in the vm_map_t structure it is
1129	* and read it our selves. ASSUMING that kernel_pmap is pointed to by
1130	* kernel_map->pmap, we scan kernel_map to locate the structure offset.
1131	* Not nice, but it will hopefully do the job in a reliable manner...
1132	*
1133	* (get_task_pmap, get_map_pmap or vm_map_pmap is what we really need btw.)
1134	*/
1135	static int s_offPmap = -1;
1136	if (RT_UNLIKELY(s_offPmap == -1))
1137	{
1138	pmap_t const p = (pmap_t )kernel_map;
1139	pmap_t const * const pEnd = p + 64;
1140	for (; p < pEnd; p++)
1141	if (*p == kernel_pmap)
1142	{
1143	s_offPmap = (uintptr_t)p - (uintptr_t)kernel_map;
1144	break;
1145	}
1146	AssertReturn(s_offPmap >= 0, NIL_RTHCPHYS);
1147	}
1148	pmap_t Pmap = (pmap_t )((uintptr_t)get_task_map((task_t)pMemDarwin->Core.u.Lock.R0Process) + s_offPmap);
1149	PgNo = pmap_find_phys(Pmap, (uintptr_t)pMemDarwin->Core.pv + iPage * PAGE_SIZE);
1150	}
1151
1152	AssertReturn(PgNo, NIL_RTHCPHYS);
1153	PhysAddr = (RTHCPHYS)PgNo << PAGE_SHIFT;
1154	Assert((PhysAddr >> PAGE_SHIFT) == PgNo);
1155	}
1156	else
1157	#endif /* USE_VM_MAP_WIRE */
1158	{
1159	/*
1160	* Get the memory descriptor.
1161	*/
1162	IOMemoryDescriptor *pMemDesc = pMemDarwin->pMemDesc;
1163	if (!pMemDesc)
1164	pMemDesc = pMemDarwin->pMemMap->getMemoryDescriptor();
1165	AssertReturn(pMemDesc, NIL_RTHCPHYS);
1166
1167	/*
1168	* If we've got a memory descriptor, use getPhysicalSegment64().
1169	*/
1170	#ifdef __LP64__
1171	addr64_t Addr = pMemDesc->getPhysicalSegment(iPage * PAGE_SIZE, NULL, kIOMemoryMapperNone);
1172	#else
1173	addr64_t Addr = pMemDesc->getPhysicalSegment64(iPage * PAGE_SIZE, NULL);
1174	#endif
1175	AssertMsgReturn(Addr, ("iPage=%u\n", iPage), NIL_RTHCPHYS);
1176	PhysAddr = Addr;
1177	AssertMsgReturn(PhysAddr == Addr, ("PhysAddr=%RHp Addr=%RX64\n", PhysAddr, (uint64_t)Addr), NIL_RTHCPHYS);
1178	}
1179
1180	return PhysAddr;
1181	}
1182

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source: vbox/trunk/src/VBox/Runtime/r0drv/darwin/memobj-r0drv-darwin.cpp@ 43974

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