memobj-r0drv-darwin.cpp@ 43304

最後變更在這個檔案從43304是 43304,由 vboxsync 提交於 13 年前
Forward ported r78691 from 4.1: Extend r80723 / r78414 to Snow Leopard.
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1	/* $Id: memobj-r0drv-darwin.cpp 43304 2012-09-11 23:56:41Z 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.alldomusa.eu.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	if (pMemDarwin->Core.enmType == RTR0MEMOBJTYPE_LOCK)
364	pMemDarwin->pMemDesc->complete(); /* paranoia */
365	pMemDarwin->pMemDesc->release();
366	pMemDarwin->pMemDesc = NULL;
367	}
368
369	if (pMemDarwin->pMemMap)
370	{
371	pMemDarwin->pMemMap->release();
372	pMemDarwin->pMemMap = NULL;
373	}
374
375	/*
376	* Release any memory that we've allocated or locked.
377	*/
378	switch (pMemDarwin->Core.enmType)
379	{
380	case RTR0MEMOBJTYPE_LOW:
381	case RTR0MEMOBJTYPE_PAGE:
382	case RTR0MEMOBJTYPE_CONT:
383	break;
384
385	case RTR0MEMOBJTYPE_LOCK:
386	{
387	#ifdef USE_VM_MAP_WIRE
388	vm_map_t Map = pMemDarwin->Core.u.Lock.R0Process != NIL_RTR0PROCESS
389	? get_task_map((task_t)pMemDarwin->Core.u.Lock.R0Process)
390	: kernel_map;
391	kern_return_t kr = vm_map_unwire(Map,
392	(vm_map_offset_t)pMemDarwin->Core.pv,
393	(vm_map_offset_t)pMemDarwin->Core.pv + pMemDarwin->Core.cb,
394	0 /* not user */);
395	AssertRC(kr == KERN_SUCCESS); /** @todo don't ignore... */
396	#endif
397	break;
398	}
399
400	case RTR0MEMOBJTYPE_PHYS:
401	/*if (pMemDarwin->Core.u.Phys.fAllocated)
402	IOFreePhysical(pMemDarwin->Core.u.Phys.PhysBase, pMemDarwin->Core.cb);*/
403	Assert(!pMemDarwin->Core.u.Phys.fAllocated);
404	break;
405
406	case RTR0MEMOBJTYPE_PHYS_NC:
407	AssertMsgFailed(("RTR0MEMOBJTYPE_PHYS_NC\n"));
408	return VERR_INTERNAL_ERROR;
409
410	case RTR0MEMOBJTYPE_RES_VIRT:
411	AssertMsgFailed(("RTR0MEMOBJTYPE_RES_VIRT\n"));
412	return VERR_INTERNAL_ERROR;
413
414	case RTR0MEMOBJTYPE_MAPPING:
415	/* nothing to do here. */
416	break;
417
418	default:
419	AssertMsgFailed(("enmType=%d\n", pMemDarwin->Core.enmType));
420	return VERR_INTERNAL_ERROR;
421	}
422
423	return VINF_SUCCESS;
424	}
425
426
427
428	/**
429	* Kernel memory alloc worker that uses inTaskWithPhysicalMask.
430	*
431	* @returns IPRT status code.
432	* @retval VERR_ADDRESS_TOO_BIG try another way.
433	*
434	* @param ppMem Where to return the memory object.
435	* @param cb The page aligned memory size.
436	* @param fExecutable Whether the mapping needs to be executable.
437	* @param fContiguous Whether the backing memory needs to be contiguous.
438	* @param PhysMask The mask for the backing memory (i.e. range). Use 0 if
439	* you don't care that much or is speculating.
440	* @param MaxPhysAddr The max address to verify the result against. Use
441	* UINT64_MAX if it doesn't matter.
442	* @param enmType The object type.
443	*/
444	static int rtR0MemObjNativeAllocWorker(PPRTR0MEMOBJINTERNAL ppMem, size_t cb,
445	bool fExecutable, bool fContiguous,
446	mach_vm_address_t PhysMask, uint64_t MaxPhysAddr,
447	RTR0MEMOBJTYPE enmType)
448	{
449	/*
450	* Try inTaskWithPhysicalMask first, but since we don't quite trust that it
451	* actually respects the physical memory mask (10.5.x is certainly busted),
452	* we'll use rtR0MemObjNativeAllocCont as a fallback for dealing with that.
453	*
454	* The kIOMemoryKernelUserShared flag just forces the result to be page aligned.
455	*/
456	#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. */
457	size_t const cbFudged = cb + PAGE_SIZE;
458	#else
459	size_t const cbFudged = cb;
460	#endif
461	int rc;
462	IOBufferMemoryDescriptor *pMemDesc =
463	IOBufferMemoryDescriptor::inTaskWithPhysicalMask(kernel_task,
464	kIOMemoryKernelUserShared
465	\| kIODirectionInOut
466	\| (fContiguous ? kIOMemoryPhysicallyContiguous : 0),
467	cbFudged,
468	PhysMask);
469	if (pMemDesc)
470	{
471	IOReturn IORet = pMemDesc->prepare(kIODirectionInOut);
472	if (IORet == kIOReturnSuccess)
473	{
474	void *pv = pMemDesc->getBytesNoCopy(0, cbFudged);
475	if (pv)
476	{
477	/*
478	* Check if it's all below 4GB.
479	*/
480	addr64_t AddrPrev = 0;
481	MaxPhysAddr &= ~(uint64_t)PAGE_OFFSET_MASK;
482	for (IOByteCount off = 0; off < cb; off += PAGE_SIZE)
483	{
484	#ifdef __LP64__ /* Grumble! */
485	addr64_t Addr = pMemDesc->getPhysicalSegment(off, NULL);
486	#else
487	addr64_t Addr = pMemDesc->getPhysicalSegment64(off, NULL);
488	#endif
489	if ( Addr > MaxPhysAddr
490	\|\| !Addr
491	\|\| (Addr & PAGE_OFFSET_MASK)
492	\|\| ( fContiguous
493	&& !off
494	&& Addr == AddrPrev + PAGE_SIZE))
495	{
496	/* Buggy API, try allocate the memory another way. */
497	pMemDesc->release();
498	if (PhysMask)
499	LogAlways(("rtR0MemObjNativeAllocWorker: off=%x Addr=%llx AddrPrev=%llx MaxPhysAddr=%llx PhysMas=%llx - buggy API!\n",
500	off, Addr, AddrPrev, MaxPhysAddr, PhysMask));
501	return VERR_ADDRESS_TOO_BIG;
502	}
503	AddrPrev = Addr;
504	}
505
506	#ifdef RT_STRICT
507	/* check that the memory is actually mapped. */
508	//addr64_t Addr = pMemDesc->getPhysicalSegment64(0, NULL);
509	//printf("rtR0MemObjNativeAllocWorker: pv=%p %8llx %8llx\n", pv, rtR0MemObjDarwinGetPTE(pv), Addr);
510	RTTHREADPREEMPTSTATE State = RTTHREADPREEMPTSTATE_INITIALIZER;
511	RTThreadPreemptDisable(&State);
512	rtR0MemObjDarwinTouchPages(pv, cb);
513	RTThreadPreemptRestore(&State);
514	#endif
515
516	/*
517	* Create the IPRT memory object.
518	*/
519	PRTR0MEMOBJDARWIN pMemDarwin = (PRTR0MEMOBJDARWIN)rtR0MemObjNew(sizeof(*pMemDarwin), enmType, pv, cb);
520	if (pMemDarwin)
521	{
522	if (fContiguous)
523	{
524	#ifdef __LP64__ /* Grumble! */
525	addr64_t PhysBase64 = pMemDesc->getPhysicalSegment(0, NULL);
526	#else
527	addr64_t PhysBase64 = pMemDesc->getPhysicalSegment64(0, NULL);
528	#endif
529	RTHCPHYS PhysBase = PhysBase64; Assert(PhysBase == PhysBase64);
530	if (enmType == RTR0MEMOBJTYPE_CONT)
531	pMemDarwin->Core.u.Cont.Phys = PhysBase;
532	else if (enmType == RTR0MEMOBJTYPE_PHYS)
533	pMemDarwin->Core.u.Phys.PhysBase = PhysBase;
534	else
535	AssertMsgFailed(("enmType=%d\n", enmType));
536	}
537
538	#if 1 /* Experimental code. */
539	if (fExecutable)
540	{
541	rc = rtR0MemObjNativeProtect(&pMemDarwin->Core, 0, cb, RTMEM_PROT_READ \| RTMEM_PROT_WRITE \| RTMEM_PROT_EXEC);
542	# ifdef RT_STRICT
543	/* check that the memory is actually mapped. */
544	RTTHREADPREEMPTSTATE State = RTTHREADPREEMPTSTATE_INITIALIZER;
545	RTThreadPreemptDisable(&State);
546	rtR0MemObjDarwinTouchPages(pv, cb);
547	RTThreadPreemptRestore(&State);
548	# endif
549
550	/* Bug 6226: Ignore KERN_PROTECTION_FAILURE on Leopard and older. */
551	if ( rc == VERR_PERMISSION_DENIED
552	&& version_major <= 10 /* 10 = 10.6.x = Snow Leopard. */)
553	rc = VINF_SUCCESS;
554	}
555	else
556	#endif
557	rc = VINF_SUCCESS;
558	if (RT_SUCCESS(rc))
559	{
560	pMemDarwin->pMemDesc = pMemDesc;
561	*ppMem = &pMemDarwin->Core;
562	return VINF_SUCCESS;
563	}
564
565	rtR0MemObjDelete(&pMemDarwin->Core);
566	}
567
568	if (enmType == RTR0MEMOBJTYPE_PHYS_NC)
569	rc = VERR_NO_PHYS_MEMORY;
570	else if (enmType == RTR0MEMOBJTYPE_LOW)
571	rc = VERR_NO_LOW_MEMORY;
572	else if (enmType == RTR0MEMOBJTYPE_CONT)
573	rc = VERR_NO_CONT_MEMORY;
574	else
575	rc = VERR_NO_MEMORY;
576	}
577	else
578	rc = VERR_MEMOBJ_INIT_FAILED;
579	}
580	else
581	rc = RTErrConvertFromDarwinIO(IORet);
582	pMemDesc->release();
583	}
584	else
585	rc = VERR_MEMOBJ_INIT_FAILED;
586	Assert(rc != VERR_ADDRESS_TOO_BIG);
587	return rc;
588	}
589
590
591	DECLHIDDEN(int) rtR0MemObjNativeAllocPage(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
592	{
593	return rtR0MemObjNativeAllocWorker(ppMem, cb, fExecutable, false /* fContiguous */,
594	0 /* PhysMask */, UINT64_MAX, RTR0MEMOBJTYPE_PAGE);
595	}
596
597
598	DECLHIDDEN(int) rtR0MemObjNativeAllocLow(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
599	{
600	/*
601	* Try IOMallocPhysical/IOMallocAligned first.
602	* Then try optimistically without a physical address mask, which will always
603	* end up using IOMallocAligned.
604	*
605	* (See bug comment in the worker and IOBufferMemoryDescriptor::initWithPhysicalMask.)
606	*/
607	int rc = rtR0MemObjNativeAllocWorker(ppMem, cb, fExecutable, false /* fContiguous */,
608	~(uint32_t)PAGE_OFFSET_MASK, _4G - PAGE_SIZE, RTR0MEMOBJTYPE_LOW);
609	if (rc == VERR_ADDRESS_TOO_BIG)
610	rc = rtR0MemObjNativeAllocWorker(ppMem, cb, fExecutable, false /* fContiguous */,
611	0 /* PhysMask */, _4G - PAGE_SIZE, RTR0MEMOBJTYPE_LOW);
612	return rc;
613	}
614
615
616	DECLHIDDEN(int) rtR0MemObjNativeAllocCont(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
617	{
618	int rc = rtR0MemObjNativeAllocWorker(ppMem, cb, fExecutable, true /* fContiguous */,
619	~(uint32_t)PAGE_OFFSET_MASK, _4G - PAGE_SIZE,
620	RTR0MEMOBJTYPE_CONT);
621
622	/*
623	* Workaround for bogus IOKernelAllocateContiguous behavior, just in case.
624	* cb <= PAGE_SIZE allocations take a different path, using a different allocator.
625	*/
626	if (RT_FAILURE(rc) && cb <= PAGE_SIZE)
627	rc = rtR0MemObjNativeAllocWorker(ppMem, cb + PAGE_SIZE, fExecutable, true /* fContiguous */,
628	~(uint32_t)PAGE_OFFSET_MASK, _4G - PAGE_SIZE,
629	RTR0MEMOBJTYPE_CONT);
630	return rc;
631	}
632
633
634	DECLHIDDEN(int) rtR0MemObjNativeAllocPhys(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest, size_t uAlignment)
635	{
636	/** @todo alignment */
637	if (uAlignment != PAGE_SIZE)
638	return VERR_NOT_SUPPORTED;
639
640	/*
641	* Translate the PhysHighest address into a mask.
642	*/
643	int rc;
644	if (PhysHighest == NIL_RTHCPHYS)
645	rc = rtR0MemObjNativeAllocWorker(ppMem, cb, true /* fExecutable /, true / fContiguous */,
646	0 /* PhysMask*/, UINT64_MAX, RTR0MEMOBJTYPE_PHYS);
647	else
648	{
649	mach_vm_address_t PhysMask = 0;
650	PhysMask = ~(mach_vm_address_t)0;
651	while (PhysMask > (PhysHighest \| PAGE_OFFSET_MASK))
652	PhysMask >>= 1;
653	AssertReturn(PhysMask + 1 <= cb, VERR_INVALID_PARAMETER);
654	PhysMask &= ~(mach_vm_address_t)PAGE_OFFSET_MASK;
655
656	rc = rtR0MemObjNativeAllocWorker(ppMem, cb, true /* fExecutable /, true / fContiguous */,
657	PhysMask, PhysHighest, RTR0MEMOBJTYPE_PHYS);
658	}
659	return rc;
660	}
661
662
663	DECLHIDDEN(int) rtR0MemObjNativeAllocPhysNC(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest)
664	{
665	/** @todo rtR0MemObjNativeAllocPhys / darwin.
666	* This might be a bit problematic and may very well require having to create our own
667	* object which we populate with pages but without mapping it into any address space.
668	* Estimate is 2-3 days.
669	*/
670	return VERR_NOT_SUPPORTED;
671	}
672
673
674	DECLHIDDEN(int) rtR0MemObjNativeEnterPhys(PPRTR0MEMOBJINTERNAL ppMem, RTHCPHYS Phys, size_t cb, uint32_t uCachePolicy)
675	{
676	AssertReturn(uCachePolicy == RTMEM_CACHE_POLICY_DONT_CARE, VERR_NOT_SUPPORTED);
677
678	/*
679	* Create a descriptor for it (the validation is always true on intel macs, but
680	* as it doesn't harm us keep it in).
681	*/
682	int rc = VERR_ADDRESS_TOO_BIG;
683	IOAddressRange aRanges[1] = { { Phys, cb } };
684	if ( aRanges[0].address == Phys
685	&& aRanges[0].length == cb)
686	{
687	IOMemoryDescriptor *pMemDesc = IOMemoryDescriptor::withAddressRanges(&aRanges[0], RT_ELEMENTS(aRanges),
688	kIODirectionInOut, NULL /task/);
689	if (pMemDesc)
690	{
691	#ifdef __LP64__ /* Grumble! */
692	Assert(Phys == pMemDesc->getPhysicalSegment(0, 0));
693	#else
694	Assert(Phys == pMemDesc->getPhysicalSegment64(0, 0));
695	#endif
696
697	/*
698	* Create the IPRT memory object.
699	*/
700	PRTR0MEMOBJDARWIN pMemDarwin = (PRTR0MEMOBJDARWIN)rtR0MemObjNew(sizeof(*pMemDarwin), RTR0MEMOBJTYPE_PHYS, NULL, cb);
701	if (pMemDarwin)
702	{
703	pMemDarwin->Core.u.Phys.PhysBase = Phys;
704	pMemDarwin->Core.u.Phys.fAllocated = false;
705	pMemDarwin->Core.u.Phys.uCachePolicy = uCachePolicy;
706	pMemDarwin->pMemDesc = pMemDesc;
707	*ppMem = &pMemDarwin->Core;
708	return VINF_SUCCESS;
709	}
710
711	rc = VERR_NO_MEMORY;
712	pMemDesc->release();
713	}
714	else
715	rc = VERR_MEMOBJ_INIT_FAILED;
716	}
717	else
718	AssertMsgFailed(("%#llx %llx\n", (unsigned long long)Phys, (unsigned long long)cb));
719	return rc;
720	}
721
722
723	/**
724	* Internal worker for locking down pages.
725	*
726	* @return IPRT status code.
727	*
728	* @param ppMem Where to store the memory object pointer.
729	* @param pv First page.
730	* @param cb Number of bytes.
731	* @param fAccess The desired access, a combination of RTMEM_PROT_READ
732	* and RTMEM_PROT_WRITE.
733	* @param Task The task \a pv and \a cb refers to.
734	*/
735	static int rtR0MemObjNativeLock(PPRTR0MEMOBJINTERNAL ppMem, void *pv, size_t cb, uint32_t fAccess, task_t Task)
736	{
737	NOREF(fAccess);
738	#ifdef USE_VM_MAP_WIRE
739	vm_map_t Map = get_task_map(Task);
740	Assert(Map);
741
742	/*
743	* First try lock the memory.
744	*/
745	int rc = VERR_LOCK_FAILED;
746	kern_return_t kr = vm_map_wire(get_task_map(Task),
747	(vm_map_offset_t)pv,
748	(vm_map_offset_t)pv + cb,
749	VM_PROT_DEFAULT,
750	0 /* not user */);
751	if (kr == KERN_SUCCESS)
752	{
753	/*
754	* Create the IPRT memory object.
755	*/
756	PRTR0MEMOBJDARWIN pMemDarwin = (PRTR0MEMOBJDARWIN)rtR0MemObjNew(sizeof(*pMemDarwin), RTR0MEMOBJTYPE_LOCK, pv, cb);
757	if (pMemDarwin)
758	{
759	pMemDarwin->Core.u.Lock.R0Process = (RTR0PROCESS)Task;
760	*ppMem = &pMemDarwin->Core;
761	return VINF_SUCCESS;
762	}
763
764	kr = vm_map_unwire(get_task_map(Task), (vm_map_offset_t)pv, (vm_map_offset_t)pv + cb, 0 /* not user */);
765	Assert(kr == KERN_SUCCESS);
766	rc = VERR_NO_MEMORY;
767	}
768
769	#else
770
771	/*
772	* Create a descriptor and try lock it (prepare).
773	*/
774	int rc = VERR_MEMOBJ_INIT_FAILED;
775	IOMemoryDescriptor *pMemDesc = IOMemoryDescriptor::withAddressRange((vm_address_t)pv, cb, kIODirectionInOut, Task);
776	if (pMemDesc)
777	{
778	IOReturn IORet = pMemDesc->prepare(kIODirectionInOut);
779	if (IORet == kIOReturnSuccess)
780	{
781	/*
782	* Create the IPRT memory object.
783	*/
784	PRTR0MEMOBJDARWIN pMemDarwin = (PRTR0MEMOBJDARWIN)rtR0MemObjNew(sizeof(*pMemDarwin), RTR0MEMOBJTYPE_LOCK, pv, cb);
785	if (pMemDarwin)
786	{
787	pMemDarwin->Core.u.Lock.R0Process = (RTR0PROCESS)Task;
788	pMemDarwin->pMemDesc = pMemDesc;
789	*ppMem = &pMemDarwin->Core;
790	return VINF_SUCCESS;
791	}
792
793	pMemDesc->complete();
794	rc = VERR_NO_MEMORY;
795	}
796	else
797	rc = VERR_LOCK_FAILED;
798	pMemDesc->release();
799	}
800	#endif
801	return rc;
802	}
803
804
805	DECLHIDDEN(int) rtR0MemObjNativeLockUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3Ptr, size_t cb, uint32_t fAccess, RTR0PROCESS R0Process)
806	{
807	return rtR0MemObjNativeLock(ppMem, (void *)R3Ptr, cb, fAccess, (task_t)R0Process);
808	}
809
810
811	DECLHIDDEN(int) rtR0MemObjNativeLockKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pv, size_t cb, uint32_t fAccess)
812	{
813	return rtR0MemObjNativeLock(ppMem, pv, cb, fAccess, kernel_task);
814	}
815
816
817	DECLHIDDEN(int) rtR0MemObjNativeReserveKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pvFixed, size_t cb, size_t uAlignment)
818	{
819	return VERR_NOT_SUPPORTED;
820	}
821
822
823	DECLHIDDEN(int) rtR0MemObjNativeReserveUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3PtrFixed, size_t cb, size_t uAlignment, RTR0PROCESS R0Process)
824	{
825	return VERR_NOT_SUPPORTED;
826	}
827
828
829	DECLHIDDEN(int) rtR0MemObjNativeMapKernel(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, void *pvFixed, size_t uAlignment,
830	unsigned fProt, size_t offSub, size_t cbSub)
831	{
832	AssertReturn(pvFixed == (void *)-1, VERR_NOT_SUPPORTED);
833
834	/*
835	* Check that the specified alignment is supported.
836	*/
837	if (uAlignment > PAGE_SIZE)
838	return VERR_NOT_SUPPORTED;
839
840	/*
841	* Must have a memory descriptor that we can map.
842	*/
843	int rc = VERR_INVALID_PARAMETER;
844	PRTR0MEMOBJDARWIN pMemToMapDarwin = (PRTR0MEMOBJDARWIN)pMemToMap;
845	if (pMemToMapDarwin->pMemDesc)
846	{
847	#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1050
848	IOMemoryMap *pMemMap = pMemToMapDarwin->pMemDesc->createMappingInTask(kernel_task,
849	0,
850	kIOMapAnywhere \| kIOMapDefaultCache,
851	offSub,
852	cbSub);
853	#else
854	IOMemoryMap *pMemMap = pMemToMapDarwin->pMemDesc->map(kernel_task,
855	0,
856	kIOMapAnywhere \| kIOMapDefaultCache,
857	offSub,
858	cbSub);
859	#endif
860	if (pMemMap)
861	{
862	IOVirtualAddress VirtAddr = pMemMap->getVirtualAddress();
863	void pv = (void )(uintptr_t)VirtAddr;
864	if ((uintptr_t)pv == VirtAddr)
865	{
866	//addr64_t Addr = pMemToMapDarwin->pMemDesc->getPhysicalSegment64(offSub, NULL);
867	//printf("pv=%p: %8llx %8llx\n", pv, rtR0MemObjDarwinGetPTE(pv), Addr);
868
869	// /*
870	// * Explicitly lock it so that we're sure it is present and that
871	// * its PTEs cannot be recycled.
872	// * Note! withAddressRange() doesn't work as it adds kIOMemoryTypeVirtual64
873	// * to the options which causes prepare() to not wire the pages.
874	// * This is probably a bug.
875	// */
876	// IOAddressRange Range = { (mach_vm_address_t)pv, cbSub };
877	// IOMemoryDescriptor *pMemDesc = IOMemoryDescriptor::withOptions(&Range,
878	// 1 /* count */,
879	// 0 /* offset */,
880	// kernel_task,
881	// kIODirectionInOut \| kIOMemoryTypeVirtual,
882	// kIOMapperSystem);
883	// if (pMemDesc)
884	// {
885	// IOReturn IORet = pMemDesc->prepare(kIODirectionInOut);
886	// if (IORet == kIOReturnSuccess)
887	// {
888	/* HACK ALERT! */
889	rtR0MemObjDarwinTouchPages(pv, cbSub);
890	/** @todo First, the memory should've been mapped by now, and second, it
891	* should have the wired attribute in the PTE (bit 9). Neither
892	* seems to be the case. The disabled locking code doesn't make any
893	* difference, which is extremely odd, and breaks
894	* rtR0MemObjNativeGetPagePhysAddr (getPhysicalSegment64 -> 64 for the
895	* lock descriptor. */
896	//addr64_t Addr = pMemDesc->getPhysicalSegment64(0, NULL);
897	//printf("pv=%p: %8llx %8llx (%d)\n", pv, rtR0MemObjDarwinGetPTE(pv), Addr, 2);
898
899	/*
900	* Create the IPRT memory object.
901	*/
902	PRTR0MEMOBJDARWIN pMemDarwin = (PRTR0MEMOBJDARWIN)rtR0MemObjNew(sizeof(*pMemDarwin), RTR0MEMOBJTYPE_MAPPING,
903	pv, cbSub);
904	if (pMemDarwin)
905	{
906	pMemDarwin->Core.u.Mapping.R0Process = NIL_RTR0PROCESS;
907	pMemDarwin->pMemMap = pMemMap;
908	// pMemDarwin->pMemDesc = pMemDesc;
909	*ppMem = &pMemDarwin->Core;
910	return VINF_SUCCESS;
911	}
912
913	// pMemDesc->complete();
914	// rc = VERR_NO_MEMORY;
915	// }
916	// else
917	// rc = RTErrConvertFromDarwinIO(IORet);
918	// pMemDesc->release();
919	// }
920	// else
921	// rc = VERR_MEMOBJ_INIT_FAILED;
922	}
923	else
924	rc = VERR_ADDRESS_TOO_BIG;
925	pMemMap->release();
926	}
927	else
928	rc = VERR_MAP_FAILED;
929	}
930	return rc;
931	}
932
933
934	DECLHIDDEN(int) rtR0MemObjNativeMapUser(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, RTR3PTR R3PtrFixed, size_t uAlignment, unsigned fProt, RTR0PROCESS R0Process)
935	{
936	/*
937	* Check for unsupported things.
938	*/
939	AssertReturn(R3PtrFixed == (RTR3PTR)-1, VERR_NOT_SUPPORTED);
940	if (uAlignment > PAGE_SIZE)
941	return VERR_NOT_SUPPORTED;
942
943	/*
944	* Must have a memory descriptor.
945	*/
946	int rc = VERR_INVALID_PARAMETER;
947	PRTR0MEMOBJDARWIN pMemToMapDarwin = (PRTR0MEMOBJDARWIN)pMemToMap;
948	if (pMemToMapDarwin->pMemDesc)
949	{
950	#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1050
951	IOMemoryMap *pMemMap = pMemToMapDarwin->pMemDesc->createMappingInTask((task_t)R0Process,
952	0,
953	kIOMapAnywhere \| kIOMapDefaultCache,
954	0 /* offset */,
955	0 /* length */);
956	#else
957	IOMemoryMap *pMemMap = pMemToMapDarwin->pMemDesc->map((task_t)R0Process,
958	0,
959	kIOMapAnywhere \| kIOMapDefaultCache);
960	#endif
961	if (pMemMap)
962	{
963	IOVirtualAddress VirtAddr = pMemMap->getVirtualAddress();
964	void pv = (void )(uintptr_t)VirtAddr;
965	if ((uintptr_t)pv == VirtAddr)
966	{
967	/*
968	* Create the IPRT memory object.
969	*/
970	PRTR0MEMOBJDARWIN pMemDarwin = (PRTR0MEMOBJDARWIN)rtR0MemObjNew(sizeof(*pMemDarwin), RTR0MEMOBJTYPE_MAPPING,
971	pv, pMemToMapDarwin->Core.cb);
972	if (pMemDarwin)
973	{
974	pMemDarwin->Core.u.Mapping.R0Process = R0Process;
975	pMemDarwin->pMemMap = pMemMap;
976	*ppMem = &pMemDarwin->Core;
977	return VINF_SUCCESS;
978	}
979
980	rc = VERR_NO_MEMORY;
981	}
982	else
983	rc = VERR_ADDRESS_TOO_BIG;
984	pMemMap->release();
985	}
986	else
987	rc = VERR_MAP_FAILED;
988	}
989	return rc;
990	}
991
992
993	DECLHIDDEN(int) rtR0MemObjNativeProtect(PRTR0MEMOBJINTERNAL pMem, size_t offSub, size_t cbSub, uint32_t fProt)
994	{
995	/* Get the map for the object. */
996	vm_map_t pVmMap = rtR0MemObjDarwinGetMap(pMem);
997	if (!pVmMap)
998	return VERR_NOT_SUPPORTED;
999
1000	/*
1001	* Convert the protection.
1002	*/
1003	vm_prot_t fMachProt;
1004	switch (fProt)
1005	{
1006	case RTMEM_PROT_NONE:
1007	fMachProt = VM_PROT_NONE;
1008	break;
1009	case RTMEM_PROT_READ:
1010	fMachProt = VM_PROT_READ;
1011	break;
1012	case RTMEM_PROT_READ \| RTMEM_PROT_WRITE:
1013	fMachProt = VM_PROT_READ \| VM_PROT_WRITE;
1014	break;
1015	case RTMEM_PROT_READ \| RTMEM_PROT_WRITE \| RTMEM_PROT_EXEC:
1016	fMachProt = VM_PROT_READ \| VM_PROT_WRITE \| VM_PROT_EXECUTE;
1017	break;
1018	case RTMEM_PROT_WRITE:
1019	fMachProt = VM_PROT_WRITE \| VM_PROT_READ; /* never write-only */
1020	break;
1021	case RTMEM_PROT_WRITE \| RTMEM_PROT_EXEC:
1022	fMachProt = VM_PROT_WRITE \| VM_PROT_EXECUTE \| VM_PROT_READ; /* never write-only or execute-only */
1023	break;
1024	case RTMEM_PROT_EXEC:
1025	fMachProt = VM_PROT_EXECUTE \| VM_PROT_READ; /* never execute-only */
1026	break;
1027	default:
1028	AssertFailedReturn(VERR_INVALID_PARAMETER);
1029	}
1030
1031	/*
1032	* Do the job.
1033	*/
1034	vm_offset_t Start = (uintptr_t)pMem->pv + offSub;
1035	kern_return_t krc = vm_protect(pVmMap,
1036	Start,
1037	cbSub,
1038	false,
1039	fMachProt);
1040	if (krc != KERN_SUCCESS)
1041	{
1042	static int s_cComplaints = 0;
1043	if (s_cComplaints < 10)
1044	{
1045	s_cComplaints++;
1046	printf("rtR0MemObjNativeProtect: vm_protect(%p,%p,%p,false,%#x) -> %d\n",
1047	pVmMap, (void )Start, (void )cbSub, fMachProt, krc);
1048
1049	kern_return_t krc2;
1050	vm_offset_t pvReal = Start;
1051	vm_size_t cbReal = 0;
1052	mach_msg_type_number_t cInfo = VM_REGION_BASIC_INFO_COUNT;
1053	struct vm_region_basic_info Info;
1054	RT_ZERO(Info);
1055	krc2 = vm_region(pVmMap, &pvReal, &cbReal, VM_REGION_BASIC_INFO, (vm_region_info_t)&Info, &cInfo, NULL);
1056	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",
1057	krc2, (void )pvReal, (void )cbReal, Info.protection, Info.max_protection, Info.inheritance,
1058	Info.shared, Info.reserved, Info.offset, Info.behavior, Info.user_wired_count);
1059	}
1060	return RTErrConvertFromDarwinKern(krc);
1061	}
1062
1063	/*
1064	* Touch the pages if they should be writable afterwards and accessible
1065	* from code which should never fault. vm_protect() may leave pages
1066	* temporarily write protected, possibly due to pmap no-upgrade rules?
1067	*
1068	* This is the same trick (or HACK ALERT if you like) as applied in
1069	* rtR0MemObjNativeMapKernel.
1070	*/
1071	if ( pMem->enmType != RTR0MEMOBJTYPE_MAPPING
1072	\|\| pMem->u.Mapping.R0Process == NIL_RTR0PROCESS)
1073	{
1074	if (fProt & RTMEM_PROT_WRITE)
1075	rtR0MemObjDarwinTouchPages((void *)Start, cbSub);
1076	/*
1077	* Sniff (read) read-only pages too, just to be sure.
1078	*/
1079	else if (fProt & (RTMEM_PROT_READ \| RTMEM_PROT_EXEC))
1080	rtR0MemObjDarwinSniffPages((void const *)Start, cbSub);
1081	}
1082
1083	return VINF_SUCCESS;
1084	}
1085
1086
1087	DECLHIDDEN(RTHCPHYS) rtR0MemObjNativeGetPagePhysAddr(PRTR0MEMOBJINTERNAL pMem, size_t iPage)
1088	{
1089	RTHCPHYS PhysAddr;
1090	PRTR0MEMOBJDARWIN pMemDarwin = (PRTR0MEMOBJDARWIN)pMem;
1091
1092	#ifdef USE_VM_MAP_WIRE
1093	/*
1094	* Locked memory doesn't have a memory descriptor and
1095	* needs to be handled differently.
1096	*/
1097	if (pMemDarwin->Core.enmType == RTR0MEMOBJTYPE_LOCK)
1098	{
1099	ppnum_t PgNo;
1100	if (pMemDarwin->Core.u.Lock.R0Process == NIL_RTR0PROCESS)
1101	PgNo = pmap_find_phys(kernel_pmap, (uintptr_t)pMemDarwin->Core.pv + iPage * PAGE_SIZE);
1102	else
1103	{
1104	/*
1105	* From what I can tell, Apple seems to have locked up the all the
1106	* available interfaces that could help us obtain the pmap_t of a task
1107	* or vm_map_t.
1108
1109	* So, we'll have to figure out where in the vm_map_t structure it is
1110	* and read it our selves. ASSUMING that kernel_pmap is pointed to by
1111	* kernel_map->pmap, we scan kernel_map to locate the structure offset.
1112	* Not nice, but it will hopefully do the job in a reliable manner...
1113	*
1114	* (get_task_pmap, get_map_pmap or vm_map_pmap is what we really need btw.)
1115	*/
1116	static int s_offPmap = -1;
1117	if (RT_UNLIKELY(s_offPmap == -1))
1118	{
1119	pmap_t const p = (pmap_t )kernel_map;
1120	pmap_t const * const pEnd = p + 64;
1121	for (; p < pEnd; p++)
1122	if (*p == kernel_pmap)
1123	{
1124	s_offPmap = (uintptr_t)p - (uintptr_t)kernel_map;
1125	break;
1126	}
1127	AssertReturn(s_offPmap >= 0, NIL_RTHCPHYS);
1128	}
1129	pmap_t Pmap = (pmap_t )((uintptr_t)get_task_map((task_t)pMemDarwin->Core.u.Lock.R0Process) + s_offPmap);
1130	PgNo = pmap_find_phys(Pmap, (uintptr_t)pMemDarwin->Core.pv + iPage * PAGE_SIZE);
1131	}
1132
1133	AssertReturn(PgNo, NIL_RTHCPHYS);
1134	PhysAddr = (RTHCPHYS)PgNo << PAGE_SHIFT;
1135	Assert((PhysAddr >> PAGE_SHIFT) == PgNo);
1136	}
1137	else
1138	#endif /* USE_VM_MAP_WIRE */
1139	{
1140	/*
1141	* Get the memory descriptor.
1142	*/
1143	IOMemoryDescriptor *pMemDesc = pMemDarwin->pMemDesc;
1144	if (!pMemDesc)
1145	pMemDesc = pMemDarwin->pMemMap->getMemoryDescriptor();
1146	AssertReturn(pMemDesc, NIL_RTHCPHYS);
1147
1148	/*
1149	* If we've got a memory descriptor, use getPhysicalSegment64().
1150	*/
1151	#ifdef __LP64__ /* Grumble! */
1152	addr64_t Addr = pMemDesc->getPhysicalSegment(iPage * PAGE_SIZE, NULL);
1153	#else
1154	addr64_t Addr = pMemDesc->getPhysicalSegment64(iPage * PAGE_SIZE, NULL);
1155	#endif
1156	AssertMsgReturn(Addr, ("iPage=%u\n", iPage), NIL_RTHCPHYS);
1157	PhysAddr = Addr;
1158	AssertMsgReturn(PhysAddr == Addr, ("PhysAddr=%RHp Addr=%RX64\n", PhysAddr, (uint64_t)Addr), NIL_RTHCPHYS);
1159	}
1160
1161	return PhysAddr;
1162	}
1163

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source: vbox/trunk/src/VBox/Runtime/r0drv/darwin/memobj-r0drv-darwin.cpp@ 43304

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