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- MmCreateSection: SectionPageProtection of PAGE_NOACCESS is valid in <=Win98, but...
[reactos.git] / reactos / ntoskrnl / mm / section.c
1 /*
2 * Copyright (C) 1998-2005 ReactOS Team (and the authors from the programmers section)
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
17 *
18 *
19 * PROJECT: ReactOS kernel
20 * FILE: ntoskrnl/mm/section.c
21 * PURPOSE: Implements section objects
22 *
23 * PROGRAMMERS: Rex Jolliff
24 * David Welch
25 * Eric Kohl
26 * Emanuele Aliberti
27 * Eugene Ingerman
28 * Casper Hornstrup
29 * KJK::Hyperion
30 * Guido de Jong
31 * Ge van Geldorp
32 * Royce Mitchell III
33 * Filip Navara
34 * Aleksey Bragin
35 * Jason Filby
36 * Thomas Weidenmueller
37 * Gunnar Andre' Dalsnes
38 * Mike Nordell
39 * Alex Ionescu
40 * Gregor Anich
41 * Steven Edwards
42 * Herve Poussineau
43 */
44
45 /* INCLUDES *****************************************************************/
46
47 #include <ntoskrnl.h>
48 #define NDEBUG
49 #include <debug.h>
50 #include <reactos/exeformat.h>
51
52 #if defined (ALLOC_PRAGMA)
53 #pragma alloc_text(INIT, MmCreatePhysicalMemorySection)
54 #pragma alloc_text(INIT, MmInitSectionImplementation)
55 #endif
56
57
58 /* TYPES *********************************************************************/
59
60 typedef struct
61 {
62 PROS_SECTION_OBJECT Section;
63 PMM_SECTION_SEGMENT Segment;
64 ULONG Offset;
65 BOOLEAN WasDirty;
66 BOOLEAN Private;
67 }
68 MM_SECTION_PAGEOUT_CONTEXT;
69
70 /* GLOBALS *******************************************************************/
71
72 POBJECT_TYPE MmSectionObjectType = NULL;
73
74 static GENERIC_MAPPING MmpSectionMapping = {
75 STANDARD_RIGHTS_READ | SECTION_MAP_READ | SECTION_QUERY,
76 STANDARD_RIGHTS_WRITE | SECTION_MAP_WRITE,
77 STANDARD_RIGHTS_EXECUTE | SECTION_MAP_EXECUTE,
78 SECTION_ALL_ACCESS};
79
80 #define PAGE_FROM_SSE(E) ((E) & 0xFFFFF000)
81 #define PFN_FROM_SSE(E) ((E) >> PAGE_SHIFT)
82 #define SHARE_COUNT_FROM_SSE(E) (((E) & 0x00000FFE) >> 1)
83 #define IS_SWAP_FROM_SSE(E) ((E) & 0x00000001)
84 #define MAX_SHARE_COUNT 0x7FF
85 #define MAKE_SSE(P, C) ((P) | ((C) << 1))
86 #define SWAPENTRY_FROM_SSE(E) ((E) >> 1)
87 #define MAKE_SWAP_SSE(S) (((S) << 1) | 0x1)
88
89 static const INFORMATION_CLASS_INFO ExSectionInfoClass[] =
90 {
91 ICI_SQ_SAME( sizeof(SECTION_BASIC_INFORMATION), sizeof(ULONG), ICIF_QUERY ), /* SectionBasicInformation */
92 ICI_SQ_SAME( sizeof(SECTION_IMAGE_INFORMATION), sizeof(ULONG), ICIF_QUERY ), /* SectionImageInformation */
93 };
94
95 /* FUNCTIONS *****************************************************************/
96
97 PFILE_OBJECT
98 NTAPI
99 MmGetFileObjectForSection(IN PROS_SECTION_OBJECT Section)
100 {
101 PAGED_CODE();
102 ASSERT(Section);
103
104 /* Return the file object */
105 return Section->FileObject; // Section->ControlArea->FileObject on NT
106 }
107
108 NTSTATUS
109 NTAPI
110 MmGetFileNameForSection(IN PROS_SECTION_OBJECT Section,
111 OUT POBJECT_NAME_INFORMATION *ModuleName)
112 {
113 POBJECT_NAME_INFORMATION ObjectNameInfo;
114 NTSTATUS Status;
115 ULONG ReturnLength;
116
117 /* Make sure it's an image section */
118 *ModuleName = NULL;
119 if (!(Section->AllocationAttributes & SEC_IMAGE))
120 {
121 /* It's not, fail */
122 return STATUS_SECTION_NOT_IMAGE;
123 }
124
125 /* Allocate memory for our structure */
126 ObjectNameInfo = ExAllocatePoolWithTag(PagedPool,
127 1024,
128 TAG('M', 'm', ' ', ' '));
129 if (!ObjectNameInfo) return STATUS_NO_MEMORY;
130
131 /* Query the name */
132 Status = ObQueryNameString(Section->FileObject,
133 ObjectNameInfo,
134 1024,
135 &ReturnLength);
136 if (!NT_SUCCESS(Status))
137 {
138 /* Failed, free memory */
139 ExFreePoolWithTag(ObjectNameInfo, TAG('M', 'm', ' ', ' '));
140 return Status;
141 }
142
143 /* Success */
144 *ModuleName = ObjectNameInfo;
145 return STATUS_SUCCESS;
146 }
147
148 NTSTATUS
149 NTAPI
150 MmGetFileNameForAddress(IN PVOID Address,
151 OUT PUNICODE_STRING ModuleName)
152 {
153 PROS_SECTION_OBJECT Section;
154 PMEMORY_AREA MemoryArea;
155 PMMSUPPORT AddressSpace;
156 POBJECT_NAME_INFORMATION ModuleNameInformation;
157 NTSTATUS Status = STATUS_ADDRESS_NOT_ASSOCIATED;
158
159 /* Get the MM_AVL_TABLE from EPROCESS */
160 if (Address >= MmSystemRangeStart)
161 {
162 AddressSpace = MmGetKernelAddressSpace();
163 }
164 else
165 {
166 AddressSpace = &PsGetCurrentProcess()->Vm;
167 }
168
169 /* Lock address space */
170 MmLockAddressSpace(AddressSpace);
171
172 /* Locate the memory area for the process by address */
173 MemoryArea = MmLocateMemoryAreaByAddress(AddressSpace, Address);
174
175 /* Make sure it's a section view type */
176 if ((MemoryArea != NULL) && (MemoryArea->Type == MEMORY_AREA_SECTION_VIEW))
177 {
178 /* Get the section pointer to the SECTION_OBJECT */
179 Section = MemoryArea->Data.SectionData.Section;
180
181 /* Unlock address space */
182 MmUnlockAddressSpace(AddressSpace);
183
184 /* Get the filename of the section */
185 Status = MmGetFileNameForSection(Section,&ModuleNameInformation);
186
187 if (NT_SUCCESS(Status))
188 {
189 /* Init modulename */
190 RtlCreateUnicodeString(ModuleName,
191 ModuleNameInformation->Name.Buffer);
192
193 /* Free temp taged buffer from MmGetFileNameForSection() */
194 ExFreePoolWithTag(ModuleNameInformation, TAG('M', 'm', ' ', ' '));
195 DPRINT("Found ModuleName %S by address %p\n",
196 ModuleName->Buffer,Address);
197 }
198 }
199 else
200 {
201 /* Unlock address space */
202 MmUnlockAddressSpace(AddressSpace);
203 }
204
205 return Status;
206 }
207
208 /* Note: Mmsp prefix denotes "Memory Manager Section Private". */
209
210 /*
211 * FUNCTION: Waits in kernel mode up to ten seconds for an MM_PAGEOP event.
212 * ARGUMENTS: PMM_PAGEOP which event we should wait for.
213 * RETURNS: Status of the wait.
214 */
215 static NTSTATUS
216 MmspWaitForPageOpCompletionEvent(PMM_PAGEOP PageOp)
217 {
218 LARGE_INTEGER Timeout;
219 #ifdef __GNUC__ /* TODO: Use other macro to check for suffix to use? */
220
221 Timeout.QuadPart = -100000000LL; // 10 sec
222 #else
223
224 Timeout.QuadPart = -100000000; // 10 sec
225 #endif
226
227 return KeWaitForSingleObject(&PageOp->CompletionEvent, 0, KernelMode, FALSE, &Timeout);
228 }
229
230
231 /*
232 * FUNCTION: Sets the page op completion event and releases the page op.
233 * ARGUMENTS: PMM_PAGEOP.
234 * RETURNS: In shorter time than it takes you to even read this
235 * description, so don't even think about geting a mug of coffee.
236 */
237 static void
238 MmspCompleteAndReleasePageOp(PMM_PAGEOP PageOp)
239 {
240 KeSetEvent(&PageOp->CompletionEvent, IO_NO_INCREMENT, FALSE);
241 MmReleasePageOp(PageOp);
242 }
243
244
245 /*
246 * FUNCTION: Waits in kernel mode indefinitely for a file object lock.
247 * ARGUMENTS: PFILE_OBJECT to wait for.
248 * RETURNS: Status of the wait.
249 */
250 static NTSTATUS
251 MmspWaitForFileLock(PFILE_OBJECT File)
252 {
253 return STATUS_SUCCESS;
254 //return KeWaitForSingleObject(&File->Lock, 0, KernelMode, FALSE, NULL);
255 }
256
257
258 VOID
259 MmFreePageTablesSectionSegment(PMM_SECTION_SEGMENT Segment)
260 {
261 ULONG i;
262 if (Segment->Length > NR_SECTION_PAGE_TABLES * PAGE_SIZE)
263 {
264 for (i = 0; i < NR_SECTION_PAGE_TABLES; i++)
265 {
266 if (Segment->PageDirectory.PageTables[i] != NULL)
267 {
268 ExFreePool(Segment->PageDirectory.PageTables[i]);
269 }
270 }
271 }
272 }
273
274 VOID
275 NTAPI
276 MmFreeSectionSegments(PFILE_OBJECT FileObject)
277 {
278 if (FileObject->SectionObjectPointer->ImageSectionObject != NULL)
279 {
280 PMM_IMAGE_SECTION_OBJECT ImageSectionObject;
281 PMM_SECTION_SEGMENT SectionSegments;
282 ULONG NrSegments;
283 ULONG i;
284
285 ImageSectionObject = (PMM_IMAGE_SECTION_OBJECT)FileObject->SectionObjectPointer->ImageSectionObject;
286 NrSegments = ImageSectionObject->NrSegments;
287 SectionSegments = ImageSectionObject->Segments;
288 for (i = 0; i < NrSegments; i++)
289 {
290 if (SectionSegments[i].ReferenceCount != 0)
291 {
292 DPRINT1("Image segment %d still referenced (was %d)\n", i,
293 SectionSegments[i].ReferenceCount);
294 KeBugCheck(MEMORY_MANAGEMENT);
295 }
296 MmFreePageTablesSectionSegment(&SectionSegments[i]);
297 }
298 ExFreePool(ImageSectionObject->Segments);
299 ExFreePool(ImageSectionObject);
300 FileObject->SectionObjectPointer->ImageSectionObject = NULL;
301 }
302 if (FileObject->SectionObjectPointer->DataSectionObject != NULL)
303 {
304 PMM_SECTION_SEGMENT Segment;
305
306 Segment = (PMM_SECTION_SEGMENT)FileObject->SectionObjectPointer->
307 DataSectionObject;
308
309 if (Segment->ReferenceCount != 0)
310 {
311 DPRINT1("Data segment still referenced\n");
312 KeBugCheck(MEMORY_MANAGEMENT);
313 }
314 MmFreePageTablesSectionSegment(Segment);
315 ExFreePool(Segment);
316 FileObject->SectionObjectPointer->DataSectionObject = NULL;
317 }
318 }
319
320 VOID
321 NTAPI
322 MmLockSectionSegment(PMM_SECTION_SEGMENT Segment)
323 {
324 ExAcquireFastMutex(&Segment->Lock);
325 }
326
327 VOID
328 NTAPI
329 MmUnlockSectionSegment(PMM_SECTION_SEGMENT Segment)
330 {
331 ExReleaseFastMutex(&Segment->Lock);
332 }
333
334 VOID
335 NTAPI
336 MmSetPageEntrySectionSegment(PMM_SECTION_SEGMENT Segment,
337 ULONG Offset,
338 ULONG Entry)
339 {
340 PSECTION_PAGE_TABLE Table;
341 ULONG DirectoryOffset;
342 ULONG TableOffset;
343
344 if (Segment->Length <= NR_SECTION_PAGE_TABLES * PAGE_SIZE)
345 {
346 Table = (PSECTION_PAGE_TABLE)&Segment->PageDirectory;
347 }
348 else
349 {
350 DirectoryOffset = PAGE_TO_SECTION_PAGE_DIRECTORY_OFFSET(Offset);
351 Table = Segment->PageDirectory.PageTables[DirectoryOffset];
352 if (Table == NULL)
353 {
354 Table =
355 Segment->PageDirectory.PageTables[DirectoryOffset] =
356 ExAllocatePoolWithTag(NonPagedPool, sizeof(SECTION_PAGE_TABLE),
357 TAG_SECTION_PAGE_TABLE);
358 if (Table == NULL)
359 {
360 KeBugCheck(MEMORY_MANAGEMENT);
361 }
362 memset(Table, 0, sizeof(SECTION_PAGE_TABLE));
363 DPRINT("Table %x\n", Table);
364 }
365 }
366 TableOffset = PAGE_TO_SECTION_PAGE_TABLE_OFFSET(Offset);
367 Table->Entry[TableOffset] = Entry;
368 }
369
370
371 ULONG
372 NTAPI
373 MmGetPageEntrySectionSegment(PMM_SECTION_SEGMENT Segment,
374 ULONG Offset)
375 {
376 PSECTION_PAGE_TABLE Table;
377 ULONG Entry;
378 ULONG DirectoryOffset;
379 ULONG TableOffset;
380
381 DPRINT("MmGetPageEntrySection(Segment %x, Offset %x)\n", Segment, Offset);
382
383 if (Segment->Length <= NR_SECTION_PAGE_TABLES * PAGE_SIZE)
384 {
385 Table = (PSECTION_PAGE_TABLE)&Segment->PageDirectory;
386 }
387 else
388 {
389 DirectoryOffset = PAGE_TO_SECTION_PAGE_DIRECTORY_OFFSET(Offset);
390 Table = Segment->PageDirectory.PageTables[DirectoryOffset];
391 DPRINT("Table %x\n", Table);
392 if (Table == NULL)
393 {
394 return(0);
395 }
396 }
397 TableOffset = PAGE_TO_SECTION_PAGE_TABLE_OFFSET(Offset);
398 Entry = Table->Entry[TableOffset];
399 return(Entry);
400 }
401
402 VOID
403 NTAPI
404 MmSharePageEntrySectionSegment(PMM_SECTION_SEGMENT Segment,
405 ULONG Offset)
406 {
407 ULONG Entry;
408
409 Entry = MmGetPageEntrySectionSegment(Segment, Offset);
410 if (Entry == 0)
411 {
412 DPRINT1("Entry == 0 for MmSharePageEntrySectionSegment\n");
413 KeBugCheck(MEMORY_MANAGEMENT);
414 }
415 if (SHARE_COUNT_FROM_SSE(Entry) == MAX_SHARE_COUNT)
416 {
417 DPRINT1("Maximum share count reached\n");
418 KeBugCheck(MEMORY_MANAGEMENT);
419 }
420 if (IS_SWAP_FROM_SSE(Entry))
421 {
422 KeBugCheck(MEMORY_MANAGEMENT);
423 }
424 Entry = MAKE_SSE(PAGE_FROM_SSE(Entry), SHARE_COUNT_FROM_SSE(Entry) + 1);
425 MmSetPageEntrySectionSegment(Segment, Offset, Entry);
426 }
427
428 BOOLEAN
429 NTAPI
430 MmUnsharePageEntrySectionSegment(PROS_SECTION_OBJECT Section,
431 PMM_SECTION_SEGMENT Segment,
432 ULONG Offset,
433 BOOLEAN Dirty,
434 BOOLEAN PageOut)
435 {
436 ULONG Entry;
437 BOOLEAN IsDirectMapped = FALSE;
438
439 Entry = MmGetPageEntrySectionSegment(Segment, Offset);
440 if (Entry == 0)
441 {
442 DPRINT1("Entry == 0 for MmUnsharePageEntrySectionSegment\n");
443 KeBugCheck(MEMORY_MANAGEMENT);
444 }
445 if (SHARE_COUNT_FROM_SSE(Entry) == 0)
446 {
447 DPRINT1("Zero share count for unshare\n");
448 KeBugCheck(MEMORY_MANAGEMENT);
449 }
450 if (IS_SWAP_FROM_SSE(Entry))
451 {
452 KeBugCheck(MEMORY_MANAGEMENT);
453 }
454 Entry = MAKE_SSE(PAGE_FROM_SSE(Entry), SHARE_COUNT_FROM_SSE(Entry) - 1);
455 /*
456 * If we reducing the share count of this entry to zero then set the entry
457 * to zero and tell the cache the page is no longer mapped.
458 */
459 if (SHARE_COUNT_FROM_SSE(Entry) == 0)
460 {
461 PFILE_OBJECT FileObject;
462 PBCB Bcb;
463 SWAPENTRY SavedSwapEntry;
464 PFN_TYPE Page;
465 BOOLEAN IsImageSection;
466 ULONG FileOffset;
467
468 FileOffset = Offset + Segment->FileOffset;
469
470 IsImageSection = Section->AllocationAttributes & SEC_IMAGE ? TRUE : FALSE;
471
472 Page = PFN_FROM_SSE(Entry);
473 FileObject = Section->FileObject;
474 if (FileObject != NULL &&
475 !(Segment->Characteristics & IMAGE_SCN_MEM_SHARED))
476 {
477
478 if ((FileOffset % PAGE_SIZE) == 0 &&
479 (Offset + PAGE_SIZE <= Segment->RawLength || !IsImageSection))
480 {
481 NTSTATUS Status;
482 Bcb = FileObject->SectionObjectPointer->SharedCacheMap;
483 IsDirectMapped = TRUE;
484 Status = CcRosUnmapCacheSegment(Bcb, FileOffset, Dirty);
485 if (!NT_SUCCESS(Status))
486 {
487 DPRINT1("CcRosUnmapCacheSegment failed, status = %x\n", Status);
488 KeBugCheck(MEMORY_MANAGEMENT);
489 }
490 }
491 }
492
493 SavedSwapEntry = MmGetSavedSwapEntryPage(Page);
494 if (SavedSwapEntry == 0)
495 {
496 if (!PageOut &&
497 ((Segment->Flags & MM_PAGEFILE_SEGMENT) ||
498 (Segment->Characteristics & IMAGE_SCN_MEM_SHARED)))
499 {
500 /*
501 * FIXME:
502 * Try to page out this page and set the swap entry
503 * within the section segment. There exist no rmap entry
504 * for this page. The pager thread can't page out a
505 * page without a rmap entry.
506 */
507 MmSetPageEntrySectionSegment(Segment, Offset, Entry);
508 }
509 else
510 {
511 MmSetPageEntrySectionSegment(Segment, Offset, 0);
512 if (!IsDirectMapped)
513 {
514 MmReleasePageMemoryConsumer(MC_USER, Page);
515 }
516 }
517 }
518 else
519 {
520 if ((Segment->Flags & MM_PAGEFILE_SEGMENT) ||
521 (Segment->Characteristics & IMAGE_SCN_MEM_SHARED))
522 {
523 if (!PageOut)
524 {
525 if (Dirty)
526 {
527 /*
528 * FIXME:
529 * We hold all locks. Nobody can do something with the current
530 * process and the current segment (also not within an other process).
531 */
532 NTSTATUS Status;
533 Status = MmWriteToSwapPage(SavedSwapEntry, Page);
534 if (!NT_SUCCESS(Status))
535 {
536 DPRINT1("MM: Failed to write to swap page (Status was 0x%.8X)\n", Status);
537 KeBugCheck(MEMORY_MANAGEMENT);
538 }
539 }
540 MmSetPageEntrySectionSegment(Segment, Offset, MAKE_SWAP_SSE(SavedSwapEntry));
541 MmSetSavedSwapEntryPage(Page, 0);
542 }
543 MmReleasePageMemoryConsumer(MC_USER, Page);
544 }
545 else
546 {
547 DPRINT1("Found a swapentry for a non private page in an image or data file sgment\n");
548 KeBugCheck(MEMORY_MANAGEMENT);
549 }
550 }
551 }
552 else
553 {
554 MmSetPageEntrySectionSegment(Segment, Offset, Entry);
555 }
556 return(SHARE_COUNT_FROM_SSE(Entry) > 0);
557 }
558
559 BOOLEAN MiIsPageFromCache(PMEMORY_AREA MemoryArea,
560 ULONG SegOffset)
561 {
562 if (!(MemoryArea->Data.SectionData.Segment->Characteristics & IMAGE_SCN_MEM_SHARED))
563 {
564 PBCB Bcb;
565 PCACHE_SEGMENT CacheSeg;
566 Bcb = MemoryArea->Data.SectionData.Section->FileObject->SectionObjectPointer->SharedCacheMap;
567 CacheSeg = CcRosLookupCacheSegment(Bcb, SegOffset + MemoryArea->Data.SectionData.Segment->FileOffset);
568 if (CacheSeg)
569 {
570 CcRosReleaseCacheSegment(Bcb, CacheSeg, CacheSeg->Valid, FALSE, TRUE);
571 return TRUE;
572 }
573 }
574 return FALSE;
575 }
576
577 NTSTATUS
578 NTAPI
579 MiReadPage(PMEMORY_AREA MemoryArea,
580 ULONG SegOffset,
581 PPFN_TYPE Page)
582 /*
583 * FUNCTION: Read a page for a section backed memory area.
584 * PARAMETERS:
585 * MemoryArea - Memory area to read the page for.
586 * Offset - Offset of the page to read.
587 * Page - Variable that receives a page contains the read data.
588 */
589 {
590 ULONG BaseOffset;
591 ULONG FileOffset;
592 PVOID BaseAddress;
593 BOOLEAN UptoDate;
594 PCACHE_SEGMENT CacheSeg;
595 PFILE_OBJECT FileObject;
596 NTSTATUS Status;
597 ULONG RawLength;
598 PBCB Bcb;
599 BOOLEAN IsImageSection;
600 ULONG Length;
601
602 FileObject = MemoryArea->Data.SectionData.Section->FileObject;
603 Bcb = FileObject->SectionObjectPointer->SharedCacheMap;
604 RawLength = MemoryArea->Data.SectionData.Segment->RawLength;
605 FileOffset = SegOffset + MemoryArea->Data.SectionData.Segment->FileOffset;
606 IsImageSection = MemoryArea->Data.SectionData.Section->AllocationAttributes & SEC_IMAGE ? TRUE : FALSE;
607
608 ASSERT(Bcb);
609
610 DPRINT("%S %x\n", FileObject->FileName.Buffer, FileOffset);
611
612 /*
613 * If the file system is letting us go directly to the cache and the
614 * memory area was mapped at an offset in the file which is page aligned
615 * then get the related cache segment.
616 */
617 if ((FileOffset % PAGE_SIZE) == 0 &&
618 (SegOffset + PAGE_SIZE <= RawLength || !IsImageSection) &&
619 !(MemoryArea->Data.SectionData.Segment->Characteristics & IMAGE_SCN_MEM_SHARED))
620 {
621
622 /*
623 * Get the related cache segment; we use a lower level interface than
624 * filesystems do because it is safe for us to use an offset with a
625 * alignment less than the file system block size.
626 */
627 Status = CcRosGetCacheSegment(Bcb,
628 FileOffset,
629 &BaseOffset,
630 &BaseAddress,
631 &UptoDate,
632 &CacheSeg);
633 if (!NT_SUCCESS(Status))
634 {
635 return(Status);
636 }
637 if (!UptoDate)
638 {
639 /*
640 * If the cache segment isn't up to date then call the file
641 * system to read in the data.
642 */
643 Status = ReadCacheSegment(CacheSeg);
644 if (!NT_SUCCESS(Status))
645 {
646 CcRosReleaseCacheSegment(Bcb, CacheSeg, FALSE, FALSE, FALSE);
647 return Status;
648 }
649 }
650 /*
651 * Retrieve the page from the cache segment that we actually want.
652 */
653 (*Page) = MmGetPhysicalAddress((char*)BaseAddress +
654 FileOffset - BaseOffset).LowPart >> PAGE_SHIFT;
655
656 CcRosReleaseCacheSegment(Bcb, CacheSeg, TRUE, FALSE, TRUE);
657 }
658 else
659 {
660 PEPROCESS Process;
661 KIRQL Irql;
662 PVOID PageAddr;
663 ULONG CacheSegOffset;
664
665 /*
666 * Allocate a page, this is rather complicated by the possibility
667 * we might have to move other things out of memory
668 */
669 Status = MmRequestPageMemoryConsumer(MC_USER, TRUE, Page);
670 if (!NT_SUCCESS(Status))
671 {
672 return(Status);
673 }
674 Status = CcRosGetCacheSegment(Bcb,
675 FileOffset,
676 &BaseOffset,
677 &BaseAddress,
678 &UptoDate,
679 &CacheSeg);
680 if (!NT_SUCCESS(Status))
681 {
682 return(Status);
683 }
684 if (!UptoDate)
685 {
686 /*
687 * If the cache segment isn't up to date then call the file
688 * system to read in the data.
689 */
690 Status = ReadCacheSegment(CacheSeg);
691 if (!NT_SUCCESS(Status))
692 {
693 CcRosReleaseCacheSegment(Bcb, CacheSeg, FALSE, FALSE, FALSE);
694 return Status;
695 }
696 }
697
698 Process = PsGetCurrentProcess();
699 PageAddr = MiMapPageInHyperSpace(Process, *Page, &Irql);
700 CacheSegOffset = BaseOffset + CacheSeg->Bcb->CacheSegmentSize - FileOffset;
701 Length = RawLength - SegOffset;
702 if (Length <= CacheSegOffset && Length <= PAGE_SIZE)
703 {
704 memcpy(PageAddr, (char*)BaseAddress + FileOffset - BaseOffset, Length);
705 }
706 else if (CacheSegOffset >= PAGE_SIZE)
707 {
708 memcpy(PageAddr, (char*)BaseAddress + FileOffset - BaseOffset, PAGE_SIZE);
709 }
710 else
711 {
712 memcpy(PageAddr, (char*)BaseAddress + FileOffset - BaseOffset, CacheSegOffset);
713 MiUnmapPageInHyperSpace(Process, PageAddr, Irql);
714 CcRosReleaseCacheSegment(Bcb, CacheSeg, TRUE, FALSE, FALSE);
715 Status = CcRosGetCacheSegment(Bcb,
716 FileOffset + CacheSegOffset,
717 &BaseOffset,
718 &BaseAddress,
719 &UptoDate,
720 &CacheSeg);
721 if (!NT_SUCCESS(Status))
722 {
723 return(Status);
724 }
725 if (!UptoDate)
726 {
727 /*
728 * If the cache segment isn't up to date then call the file
729 * system to read in the data.
730 */
731 Status = ReadCacheSegment(CacheSeg);
732 if (!NT_SUCCESS(Status))
733 {
734 CcRosReleaseCacheSegment(Bcb, CacheSeg, FALSE, FALSE, FALSE);
735 return Status;
736 }
737 }
738 PageAddr = MiMapPageInHyperSpace(Process, *Page, &Irql);
739 if (Length < PAGE_SIZE)
740 {
741 memcpy((char*)PageAddr + CacheSegOffset, BaseAddress, Length - CacheSegOffset);
742 }
743 else
744 {
745 memcpy((char*)PageAddr + CacheSegOffset, BaseAddress, PAGE_SIZE - CacheSegOffset);
746 }
747 }
748 MiUnmapPageInHyperSpace(Process, PageAddr, Irql);
749 CcRosReleaseCacheSegment(Bcb, CacheSeg, TRUE, FALSE, FALSE);
750 }
751 return(STATUS_SUCCESS);
752 }
753
754 NTSTATUS
755 NTAPI
756 MmNotPresentFaultSectionView(PMMSUPPORT AddressSpace,
757 MEMORY_AREA* MemoryArea,
758 PVOID Address,
759 BOOLEAN Locked)
760 {
761 ULONG Offset;
762 PFN_TYPE Page;
763 NTSTATUS Status;
764 PVOID PAddress;
765 PROS_SECTION_OBJECT Section;
766 PMM_SECTION_SEGMENT Segment;
767 ULONG Entry;
768 ULONG Entry1;
769 ULONG Attributes;
770 PMM_PAGEOP PageOp;
771 PMM_REGION Region;
772 BOOLEAN HasSwapEntry;
773 PEPROCESS Process = MmGetAddressSpaceOwner(AddressSpace);
774
775 /*
776 * There is a window between taking the page fault and locking the
777 * address space when another thread could load the page so we check
778 * that.
779 */
780 if (MmIsPagePresent(Process, Address))
781 {
782 if (Locked)
783 {
784 MmLockPage(MmGetPfnForProcess(Process, Address));
785 }
786 return(STATUS_SUCCESS);
787 }
788
789 PAddress = MM_ROUND_DOWN(Address, PAGE_SIZE);
790 Offset = (ULONG_PTR)PAddress - (ULONG_PTR)MemoryArea->StartingAddress
791 + MemoryArea->Data.SectionData.ViewOffset;
792
793 Segment = MemoryArea->Data.SectionData.Segment;
794 Section = MemoryArea->Data.SectionData.Section;
795 Region = MmFindRegion(MemoryArea->StartingAddress,
796 &MemoryArea->Data.SectionData.RegionListHead,
797 Address, NULL);
798 /*
799 * Lock the segment
800 */
801 MmLockSectionSegment(Segment);
802
803 /*
804 * Check if this page needs to be mapped COW
805 */
806 if ((Segment->WriteCopy || MemoryArea->Data.SectionData.WriteCopyView) &&
807 (Region->Protect == PAGE_READWRITE ||
808 Region->Protect == PAGE_EXECUTE_READWRITE))
809 {
810 Attributes = Region->Protect == PAGE_READWRITE ? PAGE_READONLY : PAGE_EXECUTE_READ;
811 }
812 else
813 {
814 Attributes = Region->Protect;
815 }
816
817 /*
818 * Get or create a page operation descriptor
819 */
820 PageOp = MmGetPageOp(MemoryArea, NULL, 0, Segment, Offset, MM_PAGEOP_PAGEIN, FALSE);
821 if (PageOp == NULL)
822 {
823 DPRINT1("MmGetPageOp failed\n");
824 KeBugCheck(MEMORY_MANAGEMENT);
825 }
826
827 /*
828 * Check if someone else is already handling this fault, if so wait
829 * for them
830 */
831 if (PageOp->Thread != PsGetCurrentThread())
832 {
833 MmUnlockSectionSegment(Segment);
834 MmUnlockAddressSpace(AddressSpace);
835 Status = MmspWaitForPageOpCompletionEvent(PageOp);
836 /*
837 * Check for various strange conditions
838 */
839 if (Status != STATUS_SUCCESS)
840 {
841 DPRINT1("Failed to wait for page op, status = %x\n", Status);
842 KeBugCheck(MEMORY_MANAGEMENT);
843 }
844 if (PageOp->Status == STATUS_PENDING)
845 {
846 DPRINT1("Woke for page op before completion\n");
847 KeBugCheck(MEMORY_MANAGEMENT);
848 }
849 MmLockAddressSpace(AddressSpace);
850 /*
851 * If this wasn't a pagein then restart the operation
852 */
853 if (PageOp->OpType != MM_PAGEOP_PAGEIN)
854 {
855 MmspCompleteAndReleasePageOp(PageOp);
856 DPRINT("Address 0x%.8X\n", Address);
857 return(STATUS_MM_RESTART_OPERATION);
858 }
859
860 /*
861 * If the thread handling this fault has failed then we don't retry
862 */
863 if (!NT_SUCCESS(PageOp->Status))
864 {
865 Status = PageOp->Status;
866 MmspCompleteAndReleasePageOp(PageOp);
867 DPRINT("Address 0x%.8X\n", Address);
868 return(Status);
869 }
870 MmLockSectionSegment(Segment);
871 /*
872 * If the completed fault was for another address space then set the
873 * page in this one.
874 */
875 if (!MmIsPagePresent(Process, Address))
876 {
877 Entry = MmGetPageEntrySectionSegment(Segment, Offset);
878 HasSwapEntry = MmIsPageSwapEntry(Process, (PVOID)PAddress);
879
880 if (PAGE_FROM_SSE(Entry) == 0 || HasSwapEntry)
881 {
882 /*
883 * The page was a private page in another or in our address space
884 */
885 MmUnlockSectionSegment(Segment);
886 MmspCompleteAndReleasePageOp(PageOp);
887 return(STATUS_MM_RESTART_OPERATION);
888 }
889
890 Page = PFN_FROM_SSE(Entry);
891
892 MmSharePageEntrySectionSegment(Segment, Offset);
893
894 /* FIXME: Should we call MmCreateVirtualMappingUnsafe if
895 * (Section->AllocationAttributes & SEC_PHYSICALMEMORY) is true?
896 */
897 Status = MmCreateVirtualMapping(Process,
898 Address,
899 Attributes,
900 &Page,
901 1);
902 if (!NT_SUCCESS(Status))
903 {
904 DPRINT1("Unable to create virtual mapping\n");
905 KeBugCheck(MEMORY_MANAGEMENT);
906 }
907 MmInsertRmap(Page, Process, (PVOID)PAddress);
908 }
909 if (Locked)
910 {
911 MmLockPage(Page);
912 }
913 MmUnlockSectionSegment(Segment);
914 PageOp->Status = STATUS_SUCCESS;
915 MmspCompleteAndReleasePageOp(PageOp);
916 DPRINT("Address 0x%.8X\n", Address);
917 return(STATUS_SUCCESS);
918 }
919
920 HasSwapEntry = MmIsPageSwapEntry(Process, (PVOID)PAddress);
921 if (HasSwapEntry)
922 {
923 /*
924 * Must be private page we have swapped out.
925 */
926 SWAPENTRY SwapEntry;
927
928 /*
929 * Sanity check
930 */
931 if (Segment->Flags & MM_PAGEFILE_SEGMENT)
932 {
933 DPRINT1("Found a swaped out private page in a pagefile section.\n");
934 KeBugCheck(MEMORY_MANAGEMENT);
935 }
936
937 MmUnlockSectionSegment(Segment);
938 MmDeletePageFileMapping(Process, (PVOID)PAddress, &SwapEntry);
939
940 MmUnlockAddressSpace(AddressSpace);
941 Status = MmRequestPageMemoryConsumer(MC_USER, TRUE, &Page);
942 if (!NT_SUCCESS(Status))
943 {
944 KeBugCheck(MEMORY_MANAGEMENT);
945 }
946
947 Status = MmReadFromSwapPage(SwapEntry, Page);
948 if (!NT_SUCCESS(Status))
949 {
950 DPRINT1("MmReadFromSwapPage failed, status = %x\n", Status);
951 KeBugCheck(MEMORY_MANAGEMENT);
952 }
953 MmLockAddressSpace(AddressSpace);
954 Status = MmCreateVirtualMapping(Process,
955 Address,
956 Region->Protect,
957 &Page,
958 1);
959 if (!NT_SUCCESS(Status))
960 {
961 DPRINT("MmCreateVirtualMapping failed, not out of memory\n");
962 KeBugCheck(MEMORY_MANAGEMENT);
963 return(Status);
964 }
965
966 /*
967 * Store the swap entry for later use.
968 */
969 MmSetSavedSwapEntryPage(Page, SwapEntry);
970
971 /*
972 * Add the page to the process's working set
973 */
974 MmInsertRmap(Page, Process, (PVOID)PAddress);
975
976 /*
977 * Finish the operation
978 */
979 if (Locked)
980 {
981 MmLockPage(Page);
982 }
983 PageOp->Status = STATUS_SUCCESS;
984 MmspCompleteAndReleasePageOp(PageOp);
985 DPRINT("Address 0x%.8X\n", Address);
986 return(STATUS_SUCCESS);
987 }
988
989 /*
990 * Satisfying a page fault on a map of /Device/PhysicalMemory is easy
991 */
992 if (Section->AllocationAttributes & SEC_PHYSICALMEMORY)
993 {
994 MmUnlockSectionSegment(Segment);
995 /*
996 * Just map the desired physical page
997 */
998 Page = Offset >> PAGE_SHIFT;
999 Status = MmCreateVirtualMappingUnsafe(Process,
1000 Address,
1001 Region->Protect,
1002 &Page,
1003 1);
1004 if (!NT_SUCCESS(Status))
1005 {
1006 DPRINT("MmCreateVirtualMappingUnsafe failed, not out of memory\n");
1007 KeBugCheck(MEMORY_MANAGEMENT);
1008 return(Status);
1009 }
1010 /*
1011 * Don't add an rmap entry since the page mapped could be for
1012 * anything.
1013 */
1014 if (Locked)
1015 {
1016 MmLockPageUnsafe(Page);
1017 }
1018
1019 /*
1020 * Cleanup and release locks
1021 */
1022 PageOp->Status = STATUS_SUCCESS;
1023 MmspCompleteAndReleasePageOp(PageOp);
1024 DPRINT("Address 0x%.8X\n", Address);
1025 return(STATUS_SUCCESS);
1026 }
1027
1028 /*
1029 * Map anonymous memory for BSS sections
1030 */
1031 if (Segment->Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA)
1032 {
1033 MmUnlockSectionSegment(Segment);
1034 Status = MmRequestPageMemoryConsumer(MC_USER, FALSE, &Page);
1035 if (!NT_SUCCESS(Status))
1036 {
1037 MmUnlockAddressSpace(AddressSpace);
1038 Status = MmRequestPageMemoryConsumer(MC_USER, TRUE, &Page);
1039 MmLockAddressSpace(AddressSpace);
1040 }
1041 if (!NT_SUCCESS(Status))
1042 {
1043 KeBugCheck(MEMORY_MANAGEMENT);
1044 }
1045 Status = MmCreateVirtualMapping(Process,
1046 Address,
1047 Region->Protect,
1048 &Page,
1049 1);
1050 if (!NT_SUCCESS(Status))
1051 {
1052 DPRINT("MmCreateVirtualMapping failed, not out of memory\n");
1053 KeBugCheck(MEMORY_MANAGEMENT);
1054 return(Status);
1055 }
1056 MmInsertRmap(Page, Process, (PVOID)PAddress);
1057 if (Locked)
1058 {
1059 MmLockPage(Page);
1060 }
1061
1062 /*
1063 * Cleanup and release locks
1064 */
1065 PageOp->Status = STATUS_SUCCESS;
1066 MmspCompleteAndReleasePageOp(PageOp);
1067 DPRINT("Address 0x%.8X\n", Address);
1068 return(STATUS_SUCCESS);
1069 }
1070
1071 /*
1072 * Get the entry corresponding to the offset within the section
1073 */
1074 Entry = MmGetPageEntrySectionSegment(Segment, Offset);
1075
1076 if (Entry == 0)
1077 {
1078 /*
1079 * If the entry is zero (and it can't change because we have
1080 * locked the segment) then we need to load the page.
1081 */
1082
1083 /*
1084 * Release all our locks and read in the page from disk
1085 */
1086 MmUnlockSectionSegment(Segment);
1087 MmUnlockAddressSpace(AddressSpace);
1088
1089 if ((Segment->Flags & MM_PAGEFILE_SEGMENT) ||
1090 (Offset >= PAGE_ROUND_UP(Segment->RawLength) && Section->AllocationAttributes & SEC_IMAGE))
1091 {
1092 Status = MmRequestPageMemoryConsumer(MC_USER, TRUE, &Page);
1093 if (!NT_SUCCESS(Status))
1094 {
1095 DPRINT1("MmRequestPageMemoryConsumer failed (Status %x)\n", Status);
1096 }
1097 }
1098 else
1099 {
1100 Status = MiReadPage(MemoryArea, Offset, &Page);
1101 if (!NT_SUCCESS(Status))
1102 {
1103 DPRINT1("MiReadPage failed (Status %x)\n", Status);
1104 }
1105 }
1106 if (!NT_SUCCESS(Status))
1107 {
1108 /*
1109 * FIXME: What do we know in this case?
1110 */
1111 /*
1112 * Cleanup and release locks
1113 */
1114 MmLockAddressSpace(AddressSpace);
1115 PageOp->Status = Status;
1116 MmspCompleteAndReleasePageOp(PageOp);
1117 DPRINT("Address 0x%.8X\n", Address);
1118 return(Status);
1119 }
1120 /*
1121 * Relock the address space and segment
1122 */
1123 MmLockAddressSpace(AddressSpace);
1124 MmLockSectionSegment(Segment);
1125
1126 /*
1127 * Check the entry. No one should change the status of a page
1128 * that has a pending page-in.
1129 */
1130 Entry1 = MmGetPageEntrySectionSegment(Segment, Offset);
1131 if (Entry != Entry1)
1132 {
1133 DPRINT1("Someone changed ppte entry while we slept\n");
1134 KeBugCheck(MEMORY_MANAGEMENT);
1135 }
1136
1137 /*
1138 * Mark the offset within the section as having valid, in-memory
1139 * data
1140 */
1141 Entry = MAKE_SSE(Page << PAGE_SHIFT, 1);
1142 MmSetPageEntrySectionSegment(Segment, Offset, Entry);
1143 MmUnlockSectionSegment(Segment);
1144
1145 Status = MmCreateVirtualMapping(Process,
1146 Address,
1147 Attributes,
1148 &Page,
1149 1);
1150 if (!NT_SUCCESS(Status))
1151 {
1152 DPRINT1("Unable to create virtual mapping\n");
1153 KeBugCheck(MEMORY_MANAGEMENT);
1154 }
1155 MmInsertRmap(Page, Process, (PVOID)PAddress);
1156
1157 if (Locked)
1158 {
1159 MmLockPage(Page);
1160 }
1161 PageOp->Status = STATUS_SUCCESS;
1162 MmspCompleteAndReleasePageOp(PageOp);
1163 DPRINT("Address 0x%.8X\n", Address);
1164 return(STATUS_SUCCESS);
1165 }
1166 else if (IS_SWAP_FROM_SSE(Entry))
1167 {
1168 SWAPENTRY SwapEntry;
1169
1170 SwapEntry = SWAPENTRY_FROM_SSE(Entry);
1171
1172 /*
1173 * Release all our locks and read in the page from disk
1174 */
1175 MmUnlockSectionSegment(Segment);
1176
1177 MmUnlockAddressSpace(AddressSpace);
1178
1179 Status = MmRequestPageMemoryConsumer(MC_USER, TRUE, &Page);
1180 if (!NT_SUCCESS(Status))
1181 {
1182 KeBugCheck(MEMORY_MANAGEMENT);
1183 }
1184
1185 Status = MmReadFromSwapPage(SwapEntry, Page);
1186 if (!NT_SUCCESS(Status))
1187 {
1188 KeBugCheck(MEMORY_MANAGEMENT);
1189 }
1190
1191 /*
1192 * Relock the address space and segment
1193 */
1194 MmLockAddressSpace(AddressSpace);
1195 MmLockSectionSegment(Segment);
1196
1197 /*
1198 * Check the entry. No one should change the status of a page
1199 * that has a pending page-in.
1200 */
1201 Entry1 = MmGetPageEntrySectionSegment(Segment, Offset);
1202 if (Entry != Entry1)
1203 {
1204 DPRINT1("Someone changed ppte entry while we slept\n");
1205 KeBugCheck(MEMORY_MANAGEMENT);
1206 }
1207
1208 /*
1209 * Mark the offset within the section as having valid, in-memory
1210 * data
1211 */
1212 Entry = MAKE_SSE(Page << PAGE_SHIFT, 1);
1213 MmSetPageEntrySectionSegment(Segment, Offset, Entry);
1214 MmUnlockSectionSegment(Segment);
1215
1216 /*
1217 * Save the swap entry.
1218 */
1219 MmSetSavedSwapEntryPage(Page, SwapEntry);
1220 Status = MmCreateVirtualMapping(Process,
1221 Address,
1222 Region->Protect,
1223 &Page,
1224 1);
1225 if (!NT_SUCCESS(Status))
1226 {
1227 DPRINT1("Unable to create virtual mapping\n");
1228 KeBugCheck(MEMORY_MANAGEMENT);
1229 }
1230 MmInsertRmap(Page, Process, (PVOID)PAddress);
1231 if (Locked)
1232 {
1233 MmLockPage(Page);
1234 }
1235 PageOp->Status = STATUS_SUCCESS;
1236 MmspCompleteAndReleasePageOp(PageOp);
1237 DPRINT("Address 0x%.8X\n", Address);
1238 return(STATUS_SUCCESS);
1239 }
1240 else
1241 {
1242 /*
1243 * If the section offset is already in-memory and valid then just
1244 * take another reference to the page
1245 */
1246
1247 Page = PFN_FROM_SSE(Entry);
1248
1249 MmSharePageEntrySectionSegment(Segment, Offset);
1250 MmUnlockSectionSegment(Segment);
1251
1252 Status = MmCreateVirtualMapping(Process,
1253 Address,
1254 Attributes,
1255 &Page,
1256 1);
1257 if (!NT_SUCCESS(Status))
1258 {
1259 DPRINT1("Unable to create virtual mapping\n");
1260 KeBugCheck(MEMORY_MANAGEMENT);
1261 }
1262 MmInsertRmap(Page, Process, (PVOID)PAddress);
1263 if (Locked)
1264 {
1265 MmLockPage(Page);
1266 }
1267 PageOp->Status = STATUS_SUCCESS;
1268 MmspCompleteAndReleasePageOp(PageOp);
1269 DPRINT("Address 0x%.8X\n", Address);
1270 return(STATUS_SUCCESS);
1271 }
1272 }
1273
1274 NTSTATUS
1275 NTAPI
1276 MmAccessFaultSectionView(PMMSUPPORT AddressSpace,
1277 MEMORY_AREA* MemoryArea,
1278 PVOID Address,
1279 BOOLEAN Locked)
1280 {
1281 PMM_SECTION_SEGMENT Segment;
1282 PROS_SECTION_OBJECT Section;
1283 PFN_TYPE OldPage;
1284 PFN_TYPE NewPage;
1285 NTSTATUS Status;
1286 PVOID PAddress;
1287 ULONG Offset;
1288 PMM_PAGEOP PageOp;
1289 PMM_REGION Region;
1290 ULONG Entry;
1291 PEPROCESS Process = MmGetAddressSpaceOwner(AddressSpace);
1292
1293 DPRINT("MmAccessFaultSectionView(%x, %x, %x, %x)\n", AddressSpace, MemoryArea, Address, Locked);
1294
1295 /*
1296 * Check if the page has been paged out or has already been set readwrite
1297 */
1298 if (!MmIsPagePresent(Process, Address) ||
1299 MmGetPageProtect(Process, Address) & PAGE_READWRITE)
1300 {
1301 DPRINT("Address 0x%.8X\n", Address);
1302 return(STATUS_SUCCESS);
1303 }
1304
1305 /*
1306 * Find the offset of the page
1307 */
1308 PAddress = MM_ROUND_DOWN(Address, PAGE_SIZE);
1309 Offset = (ULONG_PTR)PAddress - (ULONG_PTR)MemoryArea->StartingAddress
1310 + MemoryArea->Data.SectionData.ViewOffset;
1311
1312 Segment = MemoryArea->Data.SectionData.Segment;
1313 Section = MemoryArea->Data.SectionData.Section;
1314 Region = MmFindRegion(MemoryArea->StartingAddress,
1315 &MemoryArea->Data.SectionData.RegionListHead,
1316 Address, NULL);
1317 /*
1318 * Lock the segment
1319 */
1320 MmLockSectionSegment(Segment);
1321
1322 OldPage = MmGetPfnForProcess(NULL, Address);
1323 Entry = MmGetPageEntrySectionSegment(Segment, Offset);
1324
1325 MmUnlockSectionSegment(Segment);
1326
1327 /*
1328 * Check if we are doing COW
1329 */
1330 if (!((Segment->WriteCopy || MemoryArea->Data.SectionData.WriteCopyView) &&
1331 (Region->Protect == PAGE_READWRITE ||
1332 Region->Protect == PAGE_EXECUTE_READWRITE)))
1333 {
1334 DPRINT("Address 0x%.8X\n", Address);
1335 return(STATUS_ACCESS_VIOLATION);
1336 }
1337
1338 if (IS_SWAP_FROM_SSE(Entry) ||
1339 PFN_FROM_SSE(Entry) != OldPage)
1340 {
1341 /* This is a private page. We must only change the page protection. */
1342 MmSetPageProtect(Process, PAddress, Region->Protect);
1343 return(STATUS_SUCCESS);
1344 }
1345
1346 /*
1347 * Get or create a pageop
1348 */
1349 PageOp = MmGetPageOp(MemoryArea, NULL, 0, Segment, Offset,
1350 MM_PAGEOP_ACCESSFAULT, FALSE);
1351 if (PageOp == NULL)
1352 {
1353 DPRINT1("MmGetPageOp failed\n");
1354 KeBugCheck(MEMORY_MANAGEMENT);
1355 }
1356
1357 /*
1358 * Wait for any other operations to complete
1359 */
1360 if (PageOp->Thread != PsGetCurrentThread())
1361 {
1362 MmUnlockAddressSpace(AddressSpace);
1363 Status = MmspWaitForPageOpCompletionEvent(PageOp);
1364 /*
1365 * Check for various strange conditions
1366 */
1367 if (Status == STATUS_TIMEOUT)
1368 {
1369 DPRINT1("Failed to wait for page op, status = %x\n", Status);
1370 KeBugCheck(MEMORY_MANAGEMENT);
1371 }
1372 if (PageOp->Status == STATUS_PENDING)
1373 {
1374 DPRINT1("Woke for page op before completion\n");
1375 KeBugCheck(MEMORY_MANAGEMENT);
1376 }
1377 /*
1378 * Restart the operation
1379 */
1380 MmLockAddressSpace(AddressSpace);
1381 MmspCompleteAndReleasePageOp(PageOp);
1382 DPRINT("Address 0x%.8X\n", Address);
1383 return(STATUS_MM_RESTART_OPERATION);
1384 }
1385
1386 /*
1387 * Release locks now we have the pageop
1388 */
1389 MmUnlockAddressSpace(AddressSpace);
1390
1391 /*
1392 * Allocate a page
1393 */
1394 Status = MmRequestPageMemoryConsumer(MC_USER, TRUE, &NewPage);
1395 if (!NT_SUCCESS(Status))
1396 {
1397 KeBugCheck(MEMORY_MANAGEMENT);
1398 }
1399
1400 /*
1401 * Copy the old page
1402 */
1403 MiCopyFromUserPage(NewPage, PAddress);
1404
1405 MmLockAddressSpace(AddressSpace);
1406 /*
1407 * Delete the old entry.
1408 */
1409 MmDeleteVirtualMapping(Process, Address, FALSE, NULL, NULL);
1410
1411 /*
1412 * Set the PTE to point to the new page
1413 */
1414 Status = MmCreateVirtualMapping(Process,
1415 Address,
1416 Region->Protect,
1417 &NewPage,
1418 1);
1419 if (!NT_SUCCESS(Status))
1420 {
1421 DPRINT("MmCreateVirtualMapping failed, not out of memory\n");
1422 KeBugCheck(MEMORY_MANAGEMENT);
1423 return(Status);
1424 }
1425 if (!NT_SUCCESS(Status))
1426 {
1427 DPRINT1("Unable to create virtual mapping\n");
1428 KeBugCheck(MEMORY_MANAGEMENT);
1429 }
1430 if (Locked)
1431 {
1432 MmLockPage(NewPage);
1433 MmUnlockPage(OldPage);
1434 }
1435
1436 /*
1437 * Unshare the old page.
1438 */
1439 MmDeleteRmap(OldPage, Process, PAddress);
1440 MmInsertRmap(NewPage, Process, PAddress);
1441 MmLockSectionSegment(Segment);
1442 MmUnsharePageEntrySectionSegment(Section, Segment, Offset, FALSE, FALSE);
1443 MmUnlockSectionSegment(Segment);
1444
1445 PageOp->Status = STATUS_SUCCESS;
1446 MmspCompleteAndReleasePageOp(PageOp);
1447 DPRINT("Address 0x%.8X\n", Address);
1448 return(STATUS_SUCCESS);
1449 }
1450
1451 VOID
1452 MmPageOutDeleteMapping(PVOID Context, PEPROCESS Process, PVOID Address)
1453 {
1454 MM_SECTION_PAGEOUT_CONTEXT* PageOutContext;
1455 BOOLEAN WasDirty;
1456 PFN_TYPE Page;
1457
1458 PageOutContext = (MM_SECTION_PAGEOUT_CONTEXT*)Context;
1459 if (Process)
1460 {
1461 MmLockAddressSpace(&Process->Vm);
1462 }
1463
1464 MmDeleteVirtualMapping(Process,
1465 Address,
1466 FALSE,
1467 &WasDirty,
1468 &Page);
1469 if (WasDirty)
1470 {
1471 PageOutContext->WasDirty = TRUE;
1472 }
1473 if (!PageOutContext->Private)
1474 {
1475 MmLockSectionSegment(PageOutContext->Segment);
1476 MmUnsharePageEntrySectionSegment((PROS_SECTION_OBJECT)PageOutContext->Section,
1477 PageOutContext->Segment,
1478 PageOutContext->Offset,
1479 PageOutContext->WasDirty,
1480 TRUE);
1481 MmUnlockSectionSegment(PageOutContext->Segment);
1482 }
1483 if (Process)
1484 {
1485 MmUnlockAddressSpace(&Process->Vm);
1486 }
1487
1488 if (PageOutContext->Private)
1489 {
1490 MmReleasePageMemoryConsumer(MC_USER, Page);
1491 }
1492
1493 DPRINT("PhysicalAddress %x, Address %x\n", Page << PAGE_SHIFT, Address);
1494 }
1495
1496 NTSTATUS
1497 NTAPI
1498 MmPageOutSectionView(PMMSUPPORT AddressSpace,
1499 MEMORY_AREA* MemoryArea,
1500 PVOID Address,
1501 PMM_PAGEOP PageOp)
1502 {
1503 PFN_TYPE Page;
1504 MM_SECTION_PAGEOUT_CONTEXT Context;
1505 SWAPENTRY SwapEntry;
1506 ULONG Entry;
1507 ULONG FileOffset;
1508 NTSTATUS Status;
1509 PFILE_OBJECT FileObject;
1510 PBCB Bcb = NULL;
1511 BOOLEAN DirectMapped;
1512 BOOLEAN IsImageSection;
1513 PEPROCESS Process = MmGetAddressSpaceOwner(AddressSpace);
1514
1515 Address = (PVOID)PAGE_ROUND_DOWN(Address);
1516
1517 /*
1518 * Get the segment and section.
1519 */
1520 Context.Segment = MemoryArea->Data.SectionData.Segment;
1521 Context.Section = MemoryArea->Data.SectionData.Section;
1522
1523 Context.Offset = (ULONG_PTR)Address - (ULONG_PTR)MemoryArea->StartingAddress
1524 + MemoryArea->Data.SectionData.ViewOffset;
1525 FileOffset = Context.Offset + Context.Segment->FileOffset;
1526
1527 IsImageSection = Context.Section->AllocationAttributes & SEC_IMAGE ? TRUE : FALSE;
1528
1529 FileObject = Context.Section->FileObject;
1530 DirectMapped = FALSE;
1531 if (FileObject != NULL &&
1532 !(Context.Segment->Characteristics & IMAGE_SCN_MEM_SHARED))
1533 {
1534 Bcb = FileObject->SectionObjectPointer->SharedCacheMap;
1535
1536 /*
1537 * If the file system is letting us go directly to the cache and the
1538 * memory area was mapped at an offset in the file which is page aligned
1539 * then note this is a direct mapped page.
1540 */
1541 if ((FileOffset % PAGE_SIZE) == 0 &&
1542 (Context.Offset + PAGE_SIZE <= Context.Segment->RawLength || !IsImageSection))
1543 {
1544 DirectMapped = TRUE;
1545 }
1546 }
1547
1548
1549 /*
1550 * This should never happen since mappings of physical memory are never
1551 * placed in the rmap lists.
1552 */
1553 if (Context.Section->AllocationAttributes & SEC_PHYSICALMEMORY)
1554 {
1555 DPRINT1("Trying to page out from physical memory section address 0x%X "
1556 "process %d\n", Address,
1557 Process ? Process->UniqueProcessId : 0);
1558 KeBugCheck(MEMORY_MANAGEMENT);
1559 }
1560
1561 /*
1562 * Get the section segment entry and the physical address.
1563 */
1564 Entry = MmGetPageEntrySectionSegment(Context.Segment, Context.Offset);
1565 if (!MmIsPagePresent(Process, Address))
1566 {
1567 DPRINT1("Trying to page out not-present page at (%d,0x%.8X).\n",
1568 Process ? Process->UniqueProcessId : 0, Address);
1569 KeBugCheck(MEMORY_MANAGEMENT);
1570 }
1571 Page = MmGetPfnForProcess(Process, Address);
1572 SwapEntry = MmGetSavedSwapEntryPage(Page);
1573
1574 /*
1575 * Prepare the context structure for the rmap delete call.
1576 */
1577 Context.WasDirty = FALSE;
1578 if (Context.Segment->Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA ||
1579 IS_SWAP_FROM_SSE(Entry) ||
1580 PFN_FROM_SSE(Entry) != Page)
1581 {
1582 Context.Private = TRUE;
1583 }
1584 else
1585 {
1586 Context.Private = FALSE;
1587 }
1588
1589 /*
1590 * Take an additional reference to the page or the cache segment.
1591 */
1592 if (DirectMapped && !Context.Private)
1593 {
1594 if(!MiIsPageFromCache(MemoryArea, Context.Offset))
1595 {
1596 DPRINT1("Direct mapped non private page is not associated with the cache.\n");
1597 KeBugCheck(MEMORY_MANAGEMENT);
1598 }
1599 }
1600 else
1601 {
1602 MmReferencePage(Page);
1603 }
1604
1605 MmDeleteAllRmaps(Page, (PVOID)&Context, MmPageOutDeleteMapping);
1606
1607 /*
1608 * If this wasn't a private page then we should have reduced the entry to
1609 * zero by deleting all the rmaps.
1610 */
1611 if (!Context.Private && MmGetPageEntrySectionSegment(Context.Segment, Context.Offset) != 0)
1612 {
1613 if (!(Context.Segment->Flags & MM_PAGEFILE_SEGMENT) &&
1614 !(Context.Segment->Characteristics & IMAGE_SCN_MEM_SHARED))
1615 {
1616 KeBugCheck(MEMORY_MANAGEMENT);
1617 }
1618 }
1619
1620 /*
1621 * If the page wasn't dirty then we can just free it as for a readonly page.
1622 * Since we unmapped all the mappings above we know it will not suddenly
1623 * become dirty.
1624 * If the page is from a pagefile section and has no swap entry,
1625 * we can't free the page at this point.
1626 */
1627 SwapEntry = MmGetSavedSwapEntryPage(Page);
1628 if (Context.Segment->Flags & MM_PAGEFILE_SEGMENT)
1629 {
1630 if (Context.Private)
1631 {
1632 DPRINT1("Found a %s private page (address %x) in a pagefile segment.\n",
1633 Context.WasDirty ? "dirty" : "clean", Address);
1634 KeBugCheck(MEMORY_MANAGEMENT);
1635 }
1636 if (!Context.WasDirty && SwapEntry != 0)
1637 {
1638 MmSetSavedSwapEntryPage(Page, 0);
1639 MmSetPageEntrySectionSegment(Context.Segment, Context.Offset, MAKE_SWAP_SSE(SwapEntry));
1640 MmReleasePageMemoryConsumer(MC_USER, Page);
1641 PageOp->Status = STATUS_SUCCESS;
1642 MmspCompleteAndReleasePageOp(PageOp);
1643 return(STATUS_SUCCESS);
1644 }
1645 }
1646 else if (Context.Segment->Characteristics & IMAGE_SCN_MEM_SHARED)
1647 {
1648 if (Context.Private)
1649 {
1650 DPRINT1("Found a %s private page (address %x) in a shared section segment.\n",
1651 Context.WasDirty ? "dirty" : "clean", Address);
1652 KeBugCheck(MEMORY_MANAGEMENT);
1653 }
1654 if (!Context.WasDirty || SwapEntry != 0)
1655 {
1656 MmSetSavedSwapEntryPage(Page, 0);
1657 if (SwapEntry != 0)
1658 {
1659 MmSetPageEntrySectionSegment(Context.Segment, Context.Offset, MAKE_SWAP_SSE(SwapEntry));
1660 }
1661 MmReleasePageMemoryConsumer(MC_USER, Page);
1662 PageOp->Status = STATUS_SUCCESS;
1663 MmspCompleteAndReleasePageOp(PageOp);
1664 return(STATUS_SUCCESS);
1665 }
1666 }
1667 else if (!Context.Private && DirectMapped)
1668 {
1669 if (SwapEntry != 0)
1670 {
1671 DPRINT1("Found a swapentry for a non private and direct mapped page (address %x)\n",
1672 Address);
1673 KeBugCheck(MEMORY_MANAGEMENT);
1674 }
1675 Status = CcRosUnmapCacheSegment(Bcb, FileOffset, FALSE);
1676 if (!NT_SUCCESS(Status))
1677 {
1678 DPRINT1("CCRosUnmapCacheSegment failed, status = %x\n", Status);
1679 KeBugCheck(MEMORY_MANAGEMENT);
1680 }
1681 PageOp->Status = STATUS_SUCCESS;
1682 MmspCompleteAndReleasePageOp(PageOp);
1683 return(STATUS_SUCCESS);
1684 }
1685 else if (!Context.WasDirty && !DirectMapped && !Context.Private)
1686 {
1687 if (SwapEntry != 0)
1688 {
1689 DPRINT1("Found a swap entry for a non dirty, non private and not direct mapped page (address %x)\n",
1690 Address);
1691 KeBugCheck(MEMORY_MANAGEMENT);
1692 }
1693 MmReleasePageMemoryConsumer(MC_USER, Page);
1694 PageOp->Status = STATUS_SUCCESS;
1695 MmspCompleteAndReleasePageOp(PageOp);
1696 return(STATUS_SUCCESS);
1697 }
1698 else if (!Context.WasDirty && Context.Private && SwapEntry != 0)
1699 {
1700 MmSetSavedSwapEntryPage(Page, 0);
1701 MmLockAddressSpace(AddressSpace);
1702 Status = MmCreatePageFileMapping(Process,
1703 Address,
1704 SwapEntry);
1705 MmUnlockAddressSpace(AddressSpace);
1706 if (!NT_SUCCESS(Status))
1707 {
1708 KeBugCheck(MEMORY_MANAGEMENT);
1709 }
1710 MmReleasePageMemoryConsumer(MC_USER, Page);
1711 PageOp->Status = STATUS_SUCCESS;
1712 MmspCompleteAndReleasePageOp(PageOp);
1713 return(STATUS_SUCCESS);
1714 }
1715
1716 /*
1717 * If necessary, allocate an entry in the paging file for this page
1718 */
1719 if (SwapEntry == 0)
1720 {
1721 SwapEntry = MmAllocSwapPage();
1722 if (SwapEntry == 0)
1723 {
1724 MmShowOutOfSpaceMessagePagingFile();
1725 MmLockAddressSpace(AddressSpace);
1726 /*
1727 * For private pages restore the old mappings.
1728 */
1729 if (Context.Private)
1730 {
1731 Status = MmCreateVirtualMapping(Process,
1732 Address,
1733 MemoryArea->Protect,
1734 &Page,
1735 1);
1736 MmSetDirtyPage(Process, Address);
1737 MmInsertRmap(Page,
1738 Process,
1739 Address);
1740 }
1741 else
1742 {
1743 /*
1744 * For non-private pages if the page wasn't direct mapped then
1745 * set it back into the section segment entry so we don't loose
1746 * our copy. Otherwise it will be handled by the cache manager.
1747 */
1748 Status = MmCreateVirtualMapping(Process,
1749 Address,
1750 MemoryArea->Protect,
1751 &Page,
1752 1);
1753 MmSetDirtyPage(Process, Address);
1754 MmInsertRmap(Page,
1755 Process,
1756 Address);
1757 Entry = MAKE_SSE(Page << PAGE_SHIFT, 1);
1758 MmSetPageEntrySectionSegment(Context.Segment, Context.Offset, Entry);
1759 }
1760 MmUnlockAddressSpace(AddressSpace);
1761 PageOp->Status = STATUS_UNSUCCESSFUL;
1762 MmspCompleteAndReleasePageOp(PageOp);
1763 return(STATUS_PAGEFILE_QUOTA);
1764 }
1765 }
1766
1767 /*
1768 * Write the page to the pagefile
1769 */
1770 Status = MmWriteToSwapPage(SwapEntry, Page);
1771 if (!NT_SUCCESS(Status))
1772 {
1773 DPRINT1("MM: Failed to write to swap page (Status was 0x%.8X)\n",
1774 Status);
1775 /*
1776 * As above: undo our actions.
1777 * FIXME: Also free the swap page.
1778 */
1779 MmLockAddressSpace(AddressSpace);
1780 if (Context.Private)
1781 {
1782 Status = MmCreateVirtualMapping(Process,
1783 Address,
1784 MemoryArea->Protect,
1785 &Page,
1786 1);
1787 MmSetDirtyPage(Process, Address);
1788 MmInsertRmap(Page,
1789 Process,
1790 Address);
1791 }
1792 else
1793 {
1794 Status = MmCreateVirtualMapping(Process,
1795 Address,
1796 MemoryArea->Protect,
1797 &Page,
1798 1);
1799 MmSetDirtyPage(Process, Address);
1800 MmInsertRmap(Page,
1801 Process,
1802 Address);
1803 Entry = MAKE_SSE(Page << PAGE_SHIFT, 1);
1804 MmSetPageEntrySectionSegment(Context.Segment, Context.Offset, Entry);
1805 }
1806 MmUnlockAddressSpace(AddressSpace);
1807 PageOp->Status = STATUS_UNSUCCESSFUL;
1808 MmspCompleteAndReleasePageOp(PageOp);
1809 return(STATUS_UNSUCCESSFUL);
1810 }
1811
1812 /*
1813 * Otherwise we have succeeded.
1814 */
1815 DPRINT("MM: Wrote section page 0x%.8X to swap!\n", Page << PAGE_SHIFT);
1816 MmSetSavedSwapEntryPage(Page, 0);
1817 if (Context.Segment->Flags & MM_PAGEFILE_SEGMENT ||
1818 Context.Segment->Characteristics & IMAGE_SCN_MEM_SHARED)
1819 {
1820 MmSetPageEntrySectionSegment(Context.Segment, Context.Offset, MAKE_SWAP_SSE(SwapEntry));
1821 }
1822 else
1823 {
1824 MmReleasePageMemoryConsumer(MC_USER, Page);
1825 }
1826
1827 if (Context.Private)
1828 {
1829 MmLockAddressSpace(AddressSpace);
1830 Status = MmCreatePageFileMapping(Process,
1831 Address,
1832 SwapEntry);
1833 MmUnlockAddressSpace(AddressSpace);
1834 if (!NT_SUCCESS(Status))
1835 {
1836 KeBugCheck(MEMORY_MANAGEMENT);
1837 }
1838 }
1839 else
1840 {
1841 Entry = MAKE_SWAP_SSE(SwapEntry);
1842 MmSetPageEntrySectionSegment(Context.Segment, Context.Offset, Entry);
1843 }
1844
1845 PageOp->Status = STATUS_SUCCESS;
1846 MmspCompleteAndReleasePageOp(PageOp);
1847 return(STATUS_SUCCESS);
1848 }
1849
1850 NTSTATUS
1851 NTAPI
1852 MmWritePageSectionView(PMMSUPPORT AddressSpace,
1853 PMEMORY_AREA MemoryArea,
1854 PVOID Address,
1855 PMM_PAGEOP PageOp)
1856 {
1857 ULONG Offset;
1858 PROS_SECTION_OBJECT Section;
1859 PMM_SECTION_SEGMENT Segment;
1860 PFN_TYPE Page;
1861 SWAPENTRY SwapEntry;
1862 ULONG Entry;
1863 BOOLEAN Private;
1864 NTSTATUS Status;
1865 PFILE_OBJECT FileObject;
1866 PBCB Bcb = NULL;
1867 BOOLEAN DirectMapped;
1868 BOOLEAN IsImageSection;
1869 PEPROCESS Process = MmGetAddressSpaceOwner(AddressSpace);
1870
1871 Address = (PVOID)PAGE_ROUND_DOWN(Address);
1872
1873 Offset = (ULONG_PTR)Address - (ULONG_PTR)MemoryArea->StartingAddress
1874 + MemoryArea->Data.SectionData.ViewOffset;
1875
1876 /*
1877 * Get the segment and section.
1878 */
1879 Segment = MemoryArea->Data.SectionData.Segment;
1880 Section = MemoryArea->Data.SectionData.Section;
1881 IsImageSection = Section->AllocationAttributes & SEC_IMAGE ? TRUE : FALSE;
1882
1883 FileObject = Section->FileObject;
1884 DirectMapped = FALSE;
1885 if (FileObject != NULL &&
1886 !(Segment->Characteristics & IMAGE_SCN_MEM_SHARED))
1887 {
1888 Bcb = FileObject->SectionObjectPointer->SharedCacheMap;
1889
1890 /*
1891 * If the file system is letting us go directly to the cache and the
1892 * memory area was mapped at an offset in the file which is page aligned
1893 * then note this is a direct mapped page.
1894 */
1895 if (((Offset + Segment->FileOffset) % PAGE_SIZE) == 0 &&
1896 (Offset + PAGE_SIZE <= Segment->RawLength || !IsImageSection))
1897 {
1898 DirectMapped = TRUE;
1899 }
1900 }
1901
1902 /*
1903 * This should never happen since mappings of physical memory are never
1904 * placed in the rmap lists.
1905 */
1906 if (Section->AllocationAttributes & SEC_PHYSICALMEMORY)
1907 {
1908 DPRINT1("Trying to write back page from physical memory mapped at %X "
1909 "process %d\n", Address,
1910 Process ? Process->UniqueProcessId : 0);
1911 KeBugCheck(MEMORY_MANAGEMENT);
1912 }
1913
1914 /*
1915 * Get the section segment entry and the physical address.
1916 */
1917 Entry = MmGetPageEntrySectionSegment(Segment, Offset);
1918 if (!MmIsPagePresent(Process, Address))
1919 {
1920 DPRINT1("Trying to page out not-present page at (%d,0x%.8X).\n",
1921 Process ? Process->UniqueProcessId : 0, Address);
1922 KeBugCheck(MEMORY_MANAGEMENT);
1923 }
1924 Page = MmGetPfnForProcess(Process, Address);
1925 SwapEntry = MmGetSavedSwapEntryPage(Page);
1926
1927 /*
1928 * Check for a private (COWed) page.
1929 */
1930 if (Segment->Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA ||
1931 IS_SWAP_FROM_SSE(Entry) ||
1932 PFN_FROM_SSE(Entry) != Page)
1933 {
1934 Private = TRUE;
1935 }
1936 else
1937 {
1938 Private = FALSE;
1939 }
1940
1941 /*
1942 * Speculatively set all mappings of the page to clean.
1943 */
1944 MmSetCleanAllRmaps(Page);
1945
1946 /*
1947 * If this page was direct mapped from the cache then the cache manager
1948 * will take care of writing it back to disk.
1949 */
1950 if (DirectMapped && !Private)
1951 {
1952 ASSERT(SwapEntry == 0);
1953 CcRosMarkDirtyCacheSegment(Bcb, Offset + Segment->FileOffset);
1954 PageOp->Status = STATUS_SUCCESS;
1955 MmspCompleteAndReleasePageOp(PageOp);
1956 return(STATUS_SUCCESS);
1957 }
1958
1959 /*
1960 * If necessary, allocate an entry in the paging file for this page
1961 */
1962 if (SwapEntry == 0)
1963 {
1964 SwapEntry = MmAllocSwapPage();
1965 if (SwapEntry == 0)
1966 {
1967 MmSetDirtyAllRmaps(Page);
1968 PageOp->Status = STATUS_UNSUCCESSFUL;
1969 MmspCompleteAndReleasePageOp(PageOp);
1970 return(STATUS_PAGEFILE_QUOTA);
1971 }
1972 MmSetSavedSwapEntryPage(Page, SwapEntry);
1973 }
1974
1975 /*
1976 * Write the page to the pagefile
1977 */
1978 Status = MmWriteToSwapPage(SwapEntry, Page);
1979 if (!NT_SUCCESS(Status))
1980 {
1981 DPRINT1("MM: Failed to write to swap page (Status was 0x%.8X)\n",
1982 Status);
1983 MmSetDirtyAllRmaps(Page);
1984 PageOp->Status = STATUS_UNSUCCESSFUL;
1985 MmspCompleteAndReleasePageOp(PageOp);
1986 return(STATUS_UNSUCCESSFUL);
1987 }
1988
1989 /*
1990 * Otherwise we have succeeded.
1991 */
1992 DPRINT("MM: Wrote section page 0x%.8X to swap!\n", Page << PAGE_SHIFT);
1993 PageOp->Status = STATUS_SUCCESS;
1994 MmspCompleteAndReleasePageOp(PageOp);
1995 return(STATUS_SUCCESS);
1996 }
1997
1998 static VOID
1999 MmAlterViewAttributes(PMMSUPPORT AddressSpace,
2000 PVOID BaseAddress,
2001 ULONG RegionSize,
2002 ULONG OldType,
2003 ULONG OldProtect,
2004 ULONG NewType,
2005 ULONG NewProtect)
2006 {
2007 PMEMORY_AREA MemoryArea;
2008 PMM_SECTION_SEGMENT Segment;
2009 BOOLEAN DoCOW = FALSE;
2010 ULONG i;
2011 PEPROCESS Process = MmGetAddressSpaceOwner(AddressSpace);
2012
2013 MemoryArea = MmLocateMemoryAreaByAddress(AddressSpace, BaseAddress);
2014 Segment = MemoryArea->Data.SectionData.Segment;
2015
2016 if ((Segment->WriteCopy || MemoryArea->Data.SectionData.WriteCopyView) &&
2017 (NewProtect == PAGE_READWRITE || NewProtect == PAGE_EXECUTE_READWRITE))
2018 {
2019 DoCOW = TRUE;
2020 }
2021
2022 if (OldProtect != NewProtect)
2023 {
2024 for (i = 0; i < PAGE_ROUND_UP(RegionSize) / PAGE_SIZE; i++)
2025 {
2026 PVOID Address = (char*)BaseAddress + (i * PAGE_SIZE);
2027 ULONG Protect = NewProtect;
2028
2029 /*
2030 * If we doing COW for this segment then check if the page is
2031 * already private.
2032 */
2033 if (DoCOW && MmIsPagePresent(Process, Address))
2034 {
2035 ULONG Offset;
2036 ULONG Entry;
2037 PFN_TYPE Page;
2038
2039 Offset = (ULONG_PTR)Address - (ULONG_PTR)MemoryArea->StartingAddress
2040 + MemoryArea->Data.SectionData.ViewOffset;
2041 Entry = MmGetPageEntrySectionSegment(Segment, Offset);
2042 Page = MmGetPfnForProcess(Process, Address);
2043
2044 Protect = PAGE_READONLY;
2045 if (Segment->Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA ||
2046 IS_SWAP_FROM_SSE(Entry) ||
2047 PFN_FROM_SSE(Entry) != Page)
2048 {
2049 Protect = NewProtect;
2050 }
2051 }
2052
2053 if (MmIsPagePresent(Process, Address))
2054 {
2055 MmSetPageProtect(Process, Address,
2056 Protect);
2057 }
2058 }
2059 }
2060 }
2061
2062 NTSTATUS
2063 NTAPI
2064 MmProtectSectionView(PMMSUPPORT AddressSpace,
2065 PMEMORY_AREA MemoryArea,
2066 PVOID BaseAddress,
2067 ULONG Length,
2068 ULONG Protect,
2069 PULONG OldProtect)
2070 {
2071 PMM_REGION Region;
2072 NTSTATUS Status;
2073 ULONG_PTR MaxLength;
2074
2075 MaxLength = (ULONG_PTR)MemoryArea->EndingAddress - (ULONG_PTR)BaseAddress;
2076 if (Length > MaxLength)
2077 Length = MaxLength;
2078
2079 Region = MmFindRegion(MemoryArea->StartingAddress,
2080 &MemoryArea->Data.SectionData.RegionListHead,
2081 BaseAddress, NULL);
2082 if ((MemoryArea->Flags & SEC_NO_CHANGE) &&
2083 Region->Protect != Protect)
2084 {
2085 return STATUS_INVALID_PAGE_PROTECTION;
2086 }
2087
2088 *OldProtect = Region->Protect;
2089 Status = MmAlterRegion(AddressSpace, MemoryArea->StartingAddress,
2090 &MemoryArea->Data.SectionData.RegionListHead,
2091 BaseAddress, Length, Region->Type, Protect,
2092 MmAlterViewAttributes);
2093
2094 return(Status);
2095 }
2096
2097 NTSTATUS NTAPI
2098 MmQuerySectionView(PMEMORY_AREA MemoryArea,
2099 PVOID Address,
2100 PMEMORY_BASIC_INFORMATION Info,
2101 PULONG ResultLength)
2102 {
2103 PMM_REGION Region;
2104 PVOID RegionBaseAddress;
2105 PROS_SECTION_OBJECT Section;
2106 PMM_SECTION_SEGMENT Segment;
2107
2108 Region = MmFindRegion((PVOID)MemoryArea->StartingAddress,
2109 &MemoryArea->Data.SectionData.RegionListHead,
2110 Address, &RegionBaseAddress);
2111 if (Region == NULL)
2112 {
2113 return STATUS_UNSUCCESSFUL;
2114 }
2115
2116 Section = MemoryArea->Data.SectionData.Section;
2117 if (Section->AllocationAttributes & SEC_IMAGE)
2118 {
2119 Segment = MemoryArea->Data.SectionData.Segment;
2120 Info->AllocationBase = (PUCHAR)MemoryArea->StartingAddress - Segment->VirtualAddress;
2121 Info->Type = MEM_IMAGE;
2122 }
2123 else
2124 {
2125 Info->AllocationBase = MemoryArea->StartingAddress;
2126 Info->Type = MEM_MAPPED;
2127 }
2128 Info->BaseAddress = RegionBaseAddress;
2129 Info->AllocationProtect = MemoryArea->Protect;
2130 Info->RegionSize = Region->Length;
2131 Info->State = MEM_COMMIT;
2132 Info->Protect = Region->Protect;
2133
2134 *ResultLength = sizeof(MEMORY_BASIC_INFORMATION);
2135 return(STATUS_SUCCESS);
2136 }
2137
2138 VOID
2139 NTAPI
2140 MmpFreePageFileSegment(PMM_SECTION_SEGMENT Segment)
2141 {
2142 ULONG Length;
2143 ULONG Offset;
2144 ULONG Entry;
2145 ULONG SavedSwapEntry;
2146 PFN_TYPE Page;
2147
2148 Page = 0;
2149
2150 Length = PAGE_ROUND_UP(Segment->Length);
2151 for (Offset = 0; Offset < Length; Offset += PAGE_SIZE)
2152 {
2153 Entry = MmGetPageEntrySectionSegment(Segment, Offset);
2154 if (Entry)
2155 {
2156 if (IS_SWAP_FROM_SSE(Entry))
2157 {
2158 MmFreeSwapPage(SWAPENTRY_FROM_SSE(Entry));
2159 }
2160 else
2161 {
2162 Page = PFN_FROM_SSE(Entry);
2163 SavedSwapEntry = MmGetSavedSwapEntryPage(Page);
2164 if (SavedSwapEntry != 0)
2165 {
2166 MmSetSavedSwapEntryPage(Page, 0);
2167 MmFreeSwapPage(SavedSwapEntry);
2168 }
2169 MmReleasePageMemoryConsumer(MC_USER, Page);
2170 }
2171 MmSetPageEntrySectionSegment(Segment, Offset, 0);
2172 }
2173 }
2174 }
2175
2176 VOID NTAPI
2177 MmpDeleteSection(PVOID ObjectBody)
2178 {
2179 PROS_SECTION_OBJECT Section = (PROS_SECTION_OBJECT)ObjectBody;
2180
2181 DPRINT("MmpDeleteSection(ObjectBody %x)\n", ObjectBody);
2182 if (Section->AllocationAttributes & SEC_IMAGE)
2183 {
2184 ULONG i;
2185 ULONG NrSegments;
2186 ULONG RefCount;
2187 PMM_SECTION_SEGMENT SectionSegments;
2188
2189 /*
2190 * NOTE: Section->ImageSection can be NULL for short time
2191 * during the section creating. If we fail for some reason
2192 * until the image section is properly initialized we shouldn't
2193 * process further here.
2194 */
2195 if (Section->ImageSection == NULL)
2196 return;
2197
2198 SectionSegments = Section->ImageSection->Segments;
2199 NrSegments = Section->ImageSection->NrSegments;
2200
2201 for (i = 0; i < NrSegments; i++)
2202 {
2203 if (SectionSegments[i].Characteristics & IMAGE_SCN_MEM_SHARED)
2204 {
2205 MmLockSectionSegment(&SectionSegments[i]);
2206 }
2207 RefCount = InterlockedDecrementUL(&SectionSegments[i].ReferenceCount);
2208 if (SectionSegments[i].Characteristics & IMAGE_SCN_MEM_SHARED)
2209 {
2210 if (RefCount == 0)
2211 {
2212 MmpFreePageFileSegment(&SectionSegments[i]);
2213 }
2214 MmUnlockSectionSegment(&SectionSegments[i]);
2215 }
2216 }
2217 }
2218 else
2219 {
2220 /*
2221 * NOTE: Section->Segment can be NULL for short time
2222 * during the section creating.
2223 */
2224 if (Section->Segment == NULL)
2225 return;
2226
2227 if (Section->Segment->Flags & MM_PAGEFILE_SEGMENT)
2228 {
2229 MmpFreePageFileSegment(Section->Segment);
2230 MmFreePageTablesSectionSegment(Section->Segment);
2231 ExFreePool(Section->Segment);
2232 Section->Segment = NULL;
2233 }
2234 else
2235 {
2236 (void)InterlockedDecrementUL(&Section->Segment->ReferenceCount);
2237 }
2238 }
2239 if (Section->FileObject != NULL)
2240 {
2241 CcRosDereferenceCache(Section->FileObject);
2242 ObDereferenceObject(Section->FileObject);
2243 Section->FileObject = NULL;
2244 }
2245 }
2246
2247 VOID NTAPI
2248 MmpCloseSection(IN PEPROCESS Process OPTIONAL,
2249 IN PVOID Object,
2250 IN ACCESS_MASK GrantedAccess,
2251 IN ULONG ProcessHandleCount,
2252 IN ULONG SystemHandleCount)
2253 {
2254 DPRINT("MmpCloseSection(OB %x, HC %d)\n",
2255 Object, ProcessHandleCount);
2256 }
2257
2258 NTSTATUS
2259 INIT_FUNCTION
2260 NTAPI
2261 MmCreatePhysicalMemorySection(VOID)
2262 {
2263 PROS_SECTION_OBJECT PhysSection;
2264 NTSTATUS Status;
2265 OBJECT_ATTRIBUTES Obj;
2266 UNICODE_STRING Name = RTL_CONSTANT_STRING(L"\\Device\\PhysicalMemory");
2267 LARGE_INTEGER SectionSize;
2268 HANDLE Handle;
2269
2270 /*
2271 * Create the section mapping physical memory
2272 */
2273 SectionSize.QuadPart = 0xFFFFFFFF;
2274 InitializeObjectAttributes(&Obj,
2275 &Name,
2276 OBJ_PERMANENT,
2277 NULL,
2278 NULL);
2279 Status = MmCreateSection((PVOID)&PhysSection,
2280 SECTION_ALL_ACCESS,
2281 &Obj,
2282 &SectionSize,
2283 PAGE_EXECUTE_READWRITE,
2284 0,
2285 NULL,
2286 NULL);
2287 if (!NT_SUCCESS(Status))
2288 {
2289 DPRINT1("Failed to create PhysicalMemory section\n");
2290 KeBugCheck(MEMORY_MANAGEMENT);
2291 }
2292 Status = ObInsertObject(PhysSection,
2293 NULL,
2294 SECTION_ALL_ACCESS,
2295 0,
2296 NULL,
2297 &Handle);
2298 if (!NT_SUCCESS(Status))
2299 {
2300 ObDereferenceObject(PhysSection);
2301 }
2302 ObCloseHandle(Handle, KernelMode);
2303 PhysSection->AllocationAttributes |= SEC_PHYSICALMEMORY;
2304 PhysSection->Segment->Flags &= ~MM_PAGEFILE_SEGMENT;
2305
2306 return(STATUS_SUCCESS);
2307 }
2308
2309 NTSTATUS
2310 INIT_FUNCTION
2311 NTAPI
2312 MmInitSectionImplementation(VOID)
2313 {
2314 OBJECT_TYPE_INITIALIZER ObjectTypeInitializer;
2315 UNICODE_STRING Name;
2316
2317 DPRINT("Creating Section Object Type\n");
2318
2319 /* Initialize the Section object type */
2320 RtlZeroMemory(&ObjectTypeInitializer, sizeof(ObjectTypeInitializer));
2321 RtlInitUnicodeString(&Name, L"Section");
2322 ObjectTypeInitializer.Length = sizeof(ObjectTypeInitializer);
2323 ObjectTypeInitializer.DefaultPagedPoolCharge = sizeof(ROS_SECTION_OBJECT);
2324 ObjectTypeInitializer.PoolType = PagedPool;
2325 ObjectTypeInitializer.UseDefaultObject = TRUE;
2326 ObjectTypeInitializer.GenericMapping = MmpSectionMapping;
2327 ObjectTypeInitializer.DeleteProcedure = MmpDeleteSection;
2328 ObjectTypeInitializer.CloseProcedure = MmpCloseSection;
2329 ObjectTypeInitializer.ValidAccessMask = SECTION_ALL_ACCESS;
2330 ObCreateObjectType(&Name, &ObjectTypeInitializer, NULL, &MmSectionObjectType);
2331
2332 return(STATUS_SUCCESS);
2333 }
2334
2335 NTSTATUS
2336 NTAPI
2337 MmCreatePageFileSection(PROS_SECTION_OBJECT *SectionObject,
2338 ACCESS_MASK DesiredAccess,
2339 POBJECT_ATTRIBUTES ObjectAttributes,
2340 PLARGE_INTEGER UMaximumSize,
2341 ULONG SectionPageProtection,
2342 ULONG AllocationAttributes)
2343 /*
2344 * Create a section which is backed by the pagefile
2345 */
2346 {
2347 LARGE_INTEGER MaximumSize;
2348 PROS_SECTION_OBJECT Section;
2349 PMM_SECTION_SEGMENT Segment;
2350 NTSTATUS Status;
2351
2352 if (UMaximumSize == NULL)
2353 {
2354 return(STATUS_UNSUCCESSFUL);
2355 }
2356 MaximumSize = *UMaximumSize;
2357
2358 /*
2359 * Create the section
2360 */
2361 Status = ObCreateObject(ExGetPreviousMode(),
2362 MmSectionObjectType,
2363 ObjectAttributes,
2364 ExGetPreviousMode(),
2365 NULL,
2366 sizeof(ROS_SECTION_OBJECT),
2367 0,
2368 0,
2369 (PVOID*)(PVOID)&Section);
2370 if (!NT_SUCCESS(Status))
2371 {
2372 return(Status);
2373 }
2374
2375 /*
2376 * Initialize it
2377 */
2378 Section->SectionPageProtection = SectionPageProtection;
2379 Section->AllocationAttributes = AllocationAttributes;
2380 Section->Segment = NULL;
2381 Section->FileObject = NULL;
2382 Section->MaximumSize = MaximumSize;
2383 Segment = ExAllocatePoolWithTag(NonPagedPool, sizeof(MM_SECTION_SEGMENT),
2384 TAG_MM_SECTION_SEGMENT);
2385 if (Segment == NULL)
2386 {
2387 ObDereferenceObject(Section);
2388 return(STATUS_NO_MEMORY);
2389 }
2390 Section->Segment = Segment;
2391 Segment->ReferenceCount = 1;
2392 ExInitializeFastMutex(&Segment->Lock);
2393 Segment->FileOffset = 0;
2394 Segment->Protection = SectionPageProtection;
2395 Segment->RawLength = MaximumSize.u.LowPart;
2396 Segment->Length = PAGE_ROUND_UP(MaximumSize.u.LowPart);
2397 Segment->Flags = MM_PAGEFILE_SEGMENT;
2398 Segment->WriteCopy = FALSE;
2399 RtlZeroMemory(&Segment->PageDirectory, sizeof(SECTION_PAGE_DIRECTORY));
2400 Segment->VirtualAddress = 0;
2401 Segment->Characteristics = 0;
2402 *SectionObject = Section;
2403 return(STATUS_SUCCESS);
2404 }
2405
2406
2407 NTSTATUS
2408 NTAPI
2409 MmCreateDataFileSection(PROS_SECTION_OBJECT *SectionObject,
2410 ACCESS_MASK DesiredAccess,
2411 POBJECT_ATTRIBUTES ObjectAttributes,
2412 PLARGE_INTEGER UMaximumSize,
2413 ULONG SectionPageProtection,
2414 ULONG AllocationAttributes,
2415 HANDLE FileHandle)
2416 /*
2417 * Create a section backed by a data file
2418 */
2419 {
2420 PROS_SECTION_OBJECT Section;
2421 NTSTATUS Status;
2422 LARGE_INTEGER MaximumSize;
2423 PFILE_OBJECT FileObject;
2424 PMM_SECTION_SEGMENT Segment;
2425 ULONG FileAccess;
2426 IO_STATUS_BLOCK Iosb;
2427 LARGE_INTEGER Offset;
2428 CHAR Buffer;
2429 FILE_STANDARD_INFORMATION FileInfo;
2430
2431 /*
2432 * Create the section
2433 */
2434 Status = ObCreateObject(ExGetPreviousMode(),
2435 MmSectionObjectType,
2436 ObjectAttributes,
2437 ExGetPreviousMode(),
2438 NULL,
2439 sizeof(ROS_SECTION_OBJECT),
2440 0,
2441 0,
2442 (PVOID*)(PVOID)&Section);
2443 if (!NT_SUCCESS(Status))
2444 {
2445 return(Status);
2446 }
2447 /*
2448 * Initialize it
2449 */
2450 Section->SectionPageProtection = SectionPageProtection;
2451 Section->AllocationAttributes = AllocationAttributes;
2452 Section->Segment = NULL;
2453
2454 /*
2455 * Check file access required
2456 */
2457 if (SectionPageProtection & PAGE_READWRITE ||
2458 SectionPageProtection & PAGE_EXECUTE_READWRITE)
2459 {
2460 FileAccess = FILE_READ_DATA | FILE_WRITE_DATA;
2461 }
2462 else
2463 {
2464 FileAccess = FILE_READ_DATA;
2465 }
2466
2467 /*
2468 * Reference the file handle
2469 */
2470 Status = ObReferenceObjectByHandle(FileHandle,
2471 FileAccess,
2472 IoFileObjectType,
2473 ExGetPreviousMode(),
2474 (PVOID*)(PVOID)&FileObject,
2475 NULL);
2476 if (!NT_SUCCESS(Status))
2477 {
2478 ObDereferenceObject(Section);
2479 return(Status);
2480 }
2481
2482 /*
2483 * FIXME: This is propably not entirely correct. We can't look into
2484 * the standard FCB header because it might not be initialized yet
2485 * (as in case of the EXT2FS driver by Manoj Paul Joseph where the
2486 * standard file information is filled on first request).
2487 */
2488 Status = IoQueryFileInformation(FileObject,
2489 FileStandardInformation,
2490 sizeof(FILE_STANDARD_INFORMATION),
2491 &FileInfo,
2492 &Iosb.Information);
2493 if (!NT_SUCCESS(Status))
2494 {
2495 ObDereferenceObject(Section);
2496 ObDereferenceObject(FileObject);
2497 return Status;
2498 }
2499
2500 /*
2501 * FIXME: Revise this once a locking order for file size changes is
2502 * decided
2503 */
2504 if ((UMaximumSize != NULL) && (UMaximumSize->QuadPart != 0))
2505 {
2506 MaximumSize = *UMaximumSize;
2507 }
2508 else
2509 {
2510 MaximumSize = FileInfo.EndOfFile;
2511 /* Mapping zero-sized files isn't allowed. */
2512 if (MaximumSize.QuadPart == 0)
2513 {
2514 ObDereferenceObject(Section);
2515 ObDereferenceObject(FileObject);
2516 return STATUS_FILE_INVALID;
2517 }
2518 }
2519
2520 if (MaximumSize.QuadPart > FileInfo.EndOfFile.QuadPart)
2521 {
2522 Status = IoSetInformation(FileObject,
2523 FileAllocationInformation,
2524 sizeof(LARGE_INTEGER),
2525 &MaximumSize);
2526 if (!NT_SUCCESS(Status))
2527 {
2528 ObDereferenceObject(Section);
2529 ObDereferenceObject(FileObject);
2530 return(STATUS_SECTION_NOT_EXTENDED);
2531 }
2532 }
2533
2534 if (FileObject->SectionObjectPointer == NULL ||
2535 FileObject->SectionObjectPointer->SharedCacheMap == NULL)
2536 {
2537 /*
2538 * Read a bit so caching is initiated for the file object.
2539 * This is only needed because MiReadPage currently cannot
2540 * handle non-cached streams.
2541 */
2542 Offset.QuadPart = 0;
2543 Status = ZwReadFile(FileHandle,
2544 NULL,
2545 NULL,
2546 NULL,
2547 &Iosb,
2548 &Buffer,
2549 sizeof (Buffer),
2550 &Offset,
2551 0);
2552 if (!NT_SUCCESS(Status) && (Status != STATUS_END_OF_FILE))
2553 {
2554 ObDereferenceObject(Section);
2555 ObDereferenceObject(FileObject);
2556 return(Status);
2557 }
2558 if (FileObject->SectionObjectPointer == NULL ||
2559 FileObject->SectionObjectPointer->SharedCacheMap == NULL)
2560 {
2561 /* FIXME: handle this situation */
2562 ObDereferenceObject(Section);
2563 ObDereferenceObject(FileObject);
2564 return STATUS_INVALID_PARAMETER;
2565 }
2566 }
2567
2568 /*
2569 * Lock the file
2570 */
2571 Status = MmspWaitForFileLock(FileObject);
2572 if (Status != STATUS_SUCCESS)
2573 {
2574 ObDereferenceObject(Section);
2575 ObDereferenceObject(FileObject);
2576 return(Status);
2577 }
2578
2579 /*
2580 * If this file hasn't been mapped as a data file before then allocate a
2581 * section segment to describe the data file mapping
2582 */
2583 if (FileObject->SectionObjectPointer->DataSectionObject == NULL)
2584 {
2585 Segment = ExAllocatePoolWithTag(NonPagedPool, sizeof(MM_SECTION_SEGMENT),
2586 TAG_MM_SECTION_SEGMENT);
2587 if (Segment == NULL)
2588 {
2589 //KeSetEvent((PVOID)&FileObject->Lock, IO_NO_INCREMENT, FALSE);
2590 ObDereferenceObject(Section);
2591 ObDereferenceObject(FileObject);
2592 return(STATUS_NO_MEMORY);
2593 }
2594 Section->Segment = Segment;
2595 Segment->ReferenceCount = 1;
2596 ExInitializeFastMutex(&Segment->Lock);
2597 /*
2598 * Set the lock before assigning the segment to the file object
2599 */
2600 ExAcquireFastMutex(&Segment->Lock);
2601 FileObject->SectionObjectPointer->DataSectionObject = (PVOID)Segment;
2602
2603 Segment->FileOffset = 0;
2604 Segment->Protection = SectionPageProtection;
2605 Segment->Flags = MM_DATAFILE_SEGMENT;
2606 Segment->Characteristics = 0;
2607 Segment->WriteCopy = FALSE;
2608 if (AllocationAttributes & SEC_RESERVE)
2609 {
2610 Segment->Length = Segment->RawLength = 0;
2611 }
2612 else
2613 {
2614 Segment->RawLength = MaximumSize.u.LowPart;
2615 Segment->Length = PAGE_ROUND_UP(Segment->RawLength);
2616 }
2617 Segment->VirtualAddress = 0;
2618 RtlZeroMemory(&Segment->PageDirectory, sizeof(SECTION_PAGE_DIRECTORY));
2619 }
2620 else
2621 {
2622 /*
2623 * If the file is already mapped as a data file then we may need
2624 * to extend it
2625 */
2626 Segment =
2627 (PMM_SECTION_SEGMENT)FileObject->SectionObjectPointer->
2628 DataSectionObject;
2629 Section->Segment = Segment;
2630 (void)InterlockedIncrementUL(&Segment->ReferenceCount);
2631 MmLockSectionSegment(Segment);
2632
2633 if (MaximumSize.u.LowPart > Segment->RawLength &&
2634 !(AllocationAttributes & SEC_RESERVE))
2635 {
2636 Segment->RawLength = MaximumSize.u.LowPart;
2637 Segment->Length = PAGE_ROUND_UP(Segment->RawLength);
2638 }
2639 }
2640 MmUnlockSectionSegment(Segment);
2641 Section->FileObject = FileObject;
2642 Section->MaximumSize = MaximumSize;
2643 CcRosReferenceCache(FileObject);
2644 //KeSetEvent((PVOID)&FileObject->Lock, IO_NO_INCREMENT, FALSE);
2645 *SectionObject = Section;
2646 return(STATUS_SUCCESS);
2647 }
2648
2649 /*
2650 TODO: not that great (declaring loaders statically, having to declare all of
2651 them, having to keep them extern, etc.), will fix in the future
2652 */
2653 extern NTSTATUS NTAPI PeFmtCreateSection
2654 (
2655 IN CONST VOID * FileHeader,
2656 IN SIZE_T FileHeaderSize,
2657 IN PVOID File,
2658 OUT PMM_IMAGE_SECTION_OBJECT ImageSectionObject,
2659 OUT PULONG Flags,
2660 IN PEXEFMT_CB_READ_FILE ReadFileCb,
2661 IN PEXEFMT_CB_ALLOCATE_SEGMENTS AllocateSegmentsCb
2662 );
2663
2664 extern NTSTATUS NTAPI ElfFmtCreateSection
2665 (
2666 IN CONST VOID * FileHeader,
2667 IN SIZE_T FileHeaderSize,
2668 IN PVOID File,
2669 OUT PMM_IMAGE_SECTION_OBJECT ImageSectionObject,
2670 OUT PULONG Flags,
2671 IN PEXEFMT_CB_READ_FILE ReadFileCb,
2672 IN PEXEFMT_CB_ALLOCATE_SEGMENTS AllocateSegmentsCb
2673 );
2674
2675 /* TODO: this is a standard DDK/PSDK macro */
2676 #ifndef RTL_NUMBER_OF
2677 #define RTL_NUMBER_OF(ARR_) (sizeof(ARR_) / sizeof((ARR_)[0]))
2678 #endif
2679
2680 static PEXEFMT_LOADER ExeFmtpLoaders[] =
2681 {
2682 PeFmtCreateSection,
2683 #ifdef __ELF
2684 ElfFmtCreateSection
2685 #endif
2686 };
2687
2688 static
2689 PMM_SECTION_SEGMENT
2690 NTAPI
2691 ExeFmtpAllocateSegments(IN ULONG NrSegments)
2692 {
2693 SIZE_T SizeOfSegments;
2694 PMM_SECTION_SEGMENT Segments;
2695
2696 /* TODO: check for integer overflow */
2697 SizeOfSegments = sizeof(MM_SECTION_SEGMENT) * NrSegments;
2698
2699 Segments = ExAllocatePoolWithTag(NonPagedPool,
2700 SizeOfSegments,
2701 TAG_MM_SECTION_SEGMENT);
2702
2703 if(Segments)
2704 RtlZeroMemory(Segments, SizeOfSegments);
2705
2706 return Segments;
2707 }
2708
2709 static
2710 NTSTATUS
2711 NTAPI
2712 ExeFmtpReadFile(IN PVOID File,
2713 IN PLARGE_INTEGER Offset,
2714 IN ULONG Length,
2715 OUT PVOID * Data,
2716 OUT PVOID * AllocBase,
2717 OUT PULONG ReadSize)
2718 {
2719 NTSTATUS Status;
2720 LARGE_INTEGER FileOffset;
2721 ULONG AdjustOffset;
2722 ULONG OffsetAdjustment;
2723 ULONG BufferSize;
2724 ULONG UsedSize;
2725 PVOID Buffer;
2726
2727 ASSERT_IRQL_LESS(DISPATCH_LEVEL);
2728
2729 if(Length == 0)
2730 {
2731 KeBugCheck(MEMORY_MANAGEMENT);
2732 }
2733
2734 FileOffset = *Offset;
2735
2736 /* Negative/special offset: it cannot be used in this context */
2737 if(FileOffset.u.HighPart < 0)
2738 {
2739 KeBugCheck(MEMORY_MANAGEMENT);
2740 }
2741
2742 AdjustOffset = PAGE_ROUND_DOWN(FileOffset.u.LowPart);
2743 OffsetAdjustment = FileOffset.u.LowPart - AdjustOffset;
2744 FileOffset.u.LowPart = AdjustOffset;
2745
2746 BufferSize = Length + OffsetAdjustment;
2747 BufferSize = PAGE_ROUND_UP(BufferSize);
2748
2749 /*
2750 * It's ok to use paged pool, because this is a temporary buffer only used in
2751 * the loading of executables. The assumption is that MmCreateSection is
2752 * always called at low IRQLs and that these buffers don't survive a brief
2753 * initialization phase
2754 */
2755 Buffer = ExAllocatePoolWithTag(PagedPool,
2756 BufferSize,
2757 TAG('M', 'm', 'X', 'r'));
2758
2759 UsedSize = 0;
2760
2761 #if 0
2762 Status = MmspPageRead(File,
2763 Buffer,
2764 BufferSize,
2765 &FileOffset,
2766 &UsedSize);
2767 #else
2768 /*
2769 * FIXME: if we don't use ZwReadFile, caching is not enabled for the file and
2770 * nothing will work. But using ZwReadFile is wrong, and using its side effects
2771 * to initialize internal state is even worse. Our cache manager is in need of
2772 * professional help
2773 */
2774 {
2775 IO_STATUS_BLOCK Iosb;
2776
2777 Status = ZwReadFile(File,
2778 NULL,
2779 NULL,
2780 NULL,
2781 &Iosb,
2782 Buffer,
2783 BufferSize,
2784 &FileOffset,
2785 NULL);
2786
2787 if(NT_SUCCESS(Status))
2788 {
2789 UsedSize = Iosb.Information;
2790 }
2791 }
2792 #endif
2793
2794 if(NT_SUCCESS(Status) && UsedSize < OffsetAdjustment)
2795 {
2796 Status = STATUS_IN_PAGE_ERROR;
2797 ASSERT(!NT_SUCCESS(Status));
2798 }
2799
2800 if(NT_SUCCESS(Status))
2801 {
2802 *Data = (PVOID)((ULONG_PTR)Buffer + OffsetAdjustment);
2803 *AllocBase = Buffer;
2804 *ReadSize = UsedSize - OffsetAdjustment;
2805 }
2806 else
2807 {
2808 ExFreePoolWithTag(Buffer, TAG('M', 'm', 'X', 'r'));
2809 }
2810
2811 return Status;
2812 }
2813
2814 #ifdef NASSERT
2815 # define MmspAssertSegmentsSorted(OBJ_) ((void)0)
2816 # define MmspAssertSegmentsNoOverlap(OBJ_) ((void)0)
2817 # define MmspAssertSegmentsPageAligned(OBJ_) ((void)0)
2818 #else
2819 static
2820 VOID
2821 NTAPI
2822 MmspAssertSegmentsSorted(IN PMM_IMAGE_SECTION_OBJECT ImageSectionObject)
2823 {
2824 ULONG i;
2825
2826 for( i = 1; i < ImageSectionObject->NrSegments; ++ i )
2827 {
2828 ASSERT(ImageSectionObject->Segments[i].VirtualAddress >=
2829 ImageSectionObject->Segments[i - 1].VirtualAddress);
2830 }
2831 }
2832
2833 static
2834 VOID
2835 NTAPI
2836 MmspAssertSegmentsNoOverlap(IN PMM_IMAGE_SECTION_OBJECT ImageSectionObject)
2837 {
2838 ULONG i;
2839
2840 MmspAssertSegmentsSorted(ImageSectionObject);
2841
2842 for( i = 0; i < ImageSectionObject->NrSegments; ++ i )
2843 {
2844 ASSERT(ImageSectionObject->Segments[i].Length > 0);
2845
2846 if(i > 0)
2847 {
2848 ASSERT(ImageSectionObject->Segments[i].VirtualAddress >=
2849 (ImageSectionObject->Segments[i - 1].VirtualAddress +
2850 ImageSectionObject->Segments[i - 1].Length));
2851 }
2852 }
2853 }
2854
2855 static
2856 VOID
2857 NTAPI
2858 MmspAssertSegmentsPageAligned(IN PMM_IMAGE_SECTION_OBJECT ImageSectionObject)
2859 {
2860 ULONG i;
2861
2862 for( i = 0; i < ImageSectionObject->NrSegments; ++ i )
2863 {
2864 ASSERT((ImageSectionObject->Segments[i].VirtualAddress % PAGE_SIZE) == 0);
2865 ASSERT((ImageSectionObject->Segments[i].Length % PAGE_SIZE) == 0);
2866 }
2867 }
2868 #endif
2869
2870 static
2871 int
2872 __cdecl
2873 MmspCompareSegments(const void * x,
2874 const void * y)
2875 {
2876 const MM_SECTION_SEGMENT *Segment1 = (const MM_SECTION_SEGMENT *)x;
2877 const MM_SECTION_SEGMENT *Segment2 = (const MM_SECTION_SEGMENT *)y;
2878
2879 return
2880 (Segment1->VirtualAddress - Segment2->VirtualAddress) >>
2881 ((sizeof(ULONG_PTR) - sizeof(int)) * 8);
2882 }
2883
2884 /*
2885 * Ensures an image section's segments are sorted in memory
2886 */
2887 static
2888 VOID
2889 NTAPI
2890 MmspSortSegments(IN OUT PMM_IMAGE_SECTION_OBJECT ImageSectionObject,
2891 IN ULONG Flags)
2892 {
2893 if (Flags & EXEFMT_LOAD_ASSUME_SEGMENTS_SORTED)
2894 {
2895 MmspAssertSegmentsSorted(ImageSectionObject);
2896 }
2897 else
2898 {
2899 qsort(ImageSectionObject->Segments,
2900 ImageSectionObject->NrSegments,
2901 sizeof(ImageSectionObject->Segments[0]),
2902 MmspCompareSegments);
2903 }
2904 }
2905
2906
2907 /*
2908 * Ensures an image section's segments don't overlap in memory and don't have
2909 * gaps and don't have a null size. We let them map to overlapping file regions,
2910 * though - that's not necessarily an error
2911 */
2912 static
2913 BOOLEAN
2914 NTAPI
2915 MmspCheckSegmentBounds
2916 (
2917 IN OUT PMM_IMAGE_SECTION_OBJECT ImageSectionObject,
2918 IN ULONG Flags
2919 )
2920 {
2921 ULONG i;
2922
2923 if (Flags & EXEFMT_LOAD_ASSUME_SEGMENTS_NO_OVERLAP)
2924 {
2925 MmspAssertSegmentsNoOverlap(ImageSectionObject);
2926 return TRUE;
2927 }
2928
2929 ASSERT(ImageSectionObject->NrSegments >= 1);
2930
2931 for ( i = 0; i < ImageSectionObject->NrSegments; ++ i )
2932 {
2933 if(ImageSectionObject->Segments[i].Length == 0)
2934 {
2935 return FALSE;
2936 }
2937
2938 if(i > 0)
2939 {
2940 /*
2941 * TODO: relax the limitation on gaps. For example, gaps smaller than a
2942 * page could be OK (Windows seems to be OK with them), and larger gaps
2943 * could lead to image sections spanning several discontiguous regions
2944 * (NtMapViewOfSection could then refuse to map them, and they could
2945 * e.g. only be allowed as parameters to NtCreateProcess, like on UNIX)
2946 */
2947 if ((ImageSectionObject->Segments[i - 1].VirtualAddress +
2948 ImageSectionObject->Segments[i - 1].Length) !=
2949 ImageSectionObject->Segments[i].VirtualAddress)
2950 {
2951 return FALSE;
2952 }
2953 }
2954 }
2955
2956 return TRUE;
2957 }
2958
2959 /*
2960 * Merges and pads an image section's segments until they all are page-aligned
2961 * and have a size that is a multiple of the page size
2962 */
2963 static
2964 BOOLEAN
2965 NTAPI
2966 MmspPageAlignSegments
2967 (
2968 IN OUT PMM_IMAGE_SECTION_OBJECT ImageSectionObject,
2969 IN ULONG Flags
2970 )
2971 {
2972 ULONG i;
2973 ULONG LastSegment;
2974 BOOLEAN Initialized;
2975 PMM_SECTION_SEGMENT EffectiveSegment;
2976
2977 if (Flags & EXEFMT_LOAD_ASSUME_SEGMENTS_PAGE_ALIGNED)
2978 {
2979 MmspAssertSegmentsPageAligned(ImageSectionObject);
2980 return TRUE;
2981 }
2982
2983 Initialized = FALSE;
2984 LastSegment = 0;
2985 EffectiveSegment = &ImageSectionObject->Segments[LastSegment];
2986
2987 for ( i = 0; i < ImageSectionObject->NrSegments; ++ i )
2988 {
2989 /*
2990 * The first segment requires special handling
2991 */
2992 if (i == 0)
2993 {
2994 ULONG_PTR VirtualAddress;
2995 ULONG_PTR VirtualOffset;
2996
2997 VirtualAddress = EffectiveSegment->VirtualAddress;
2998
2999 /* Round down the virtual address to the nearest page */
3000 EffectiveSegment->VirtualAddress = PAGE_ROUND_DOWN(VirtualAddress);
3001
3002 /* Round up the virtual size to the nearest page */
3003 EffectiveSegment->Length = PAGE_ROUND_UP(VirtualAddress + EffectiveSegment->Length) -
3004 EffectiveSegment->VirtualAddress;
3005
3006 /* Adjust the raw address and size */
3007 VirtualOffset = VirtualAddress - EffectiveSegment->VirtualAddress;
3008
3009 if (EffectiveSegment->FileOffset < VirtualOffset)
3010 {
3011 return FALSE;
3012 }
3013
3014 /*
3015 * Garbage in, garbage out: unaligned base addresses make the file
3016 * offset point in curious and odd places, but that's what we were
3017 * asked for
3018 */
3019 EffectiveSegment->FileOffset -= VirtualOffset;
3020 EffectiveSegment->RawLength += VirtualOffset;
3021 }
3022 else
3023 {
3024 PMM_SECTION_SEGMENT Segment = &ImageSectionObject->Segments[i];
3025 ULONG_PTR EndOfEffectiveSegment;
3026
3027 EndOfEffectiveSegment = EffectiveSegment->VirtualAddress + EffectiveSegment->Length;
3028 ASSERT((EndOfEffectiveSegment % PAGE_SIZE) == 0);
3029
3030 /*
3031 * The current segment begins exactly where the current effective
3032 * segment ended, therefore beginning a new effective segment
3033 */
3034 if (EndOfEffectiveSegment == Segment->VirtualAddress)
3035 {
3036 LastSegment ++;
3037 ASSERT(LastSegment <= i);
3038 ASSERT(LastSegment < ImageSectionObject->NrSegments);
3039
3040 EffectiveSegment = &ImageSectionObject->Segments[LastSegment];
3041
3042 if (LastSegment != i)
3043 {
3044 /*
3045 * Copy the current segment. If necessary, the effective segment
3046 * will be expanded later
3047 */
3048 *EffectiveSegment = *Segment;
3049 }
3050
3051 /*
3052 * Page-align the virtual size. We know for sure the virtual address
3053 * already is
3054 */
3055 ASSERT((EffectiveSegment->VirtualAddress % PAGE_SIZE) == 0);
3056 EffectiveSegment->Length = PAGE_ROUND_UP(EffectiveSegment->Length);
3057 }
3058 /*
3059 * The current segment is still part of the current effective segment:
3060 * extend the effective segment to reflect this
3061 */
3062 else if (EndOfEffectiveSegment > Segment->VirtualAddress)
3063 {
3064 static const ULONG FlagsToProtection[16] =
3065 {
3066 PAGE_NOACCESS,
3067 PAGE_READONLY,
3068 PAGE_READWRITE,
3069 PAGE_READWRITE,
3070 PAGE_EXECUTE_READ,
3071 PAGE_EXECUTE_READ,
3072 PAGE_EXECUTE_READWRITE,
3073 PAGE_EXECUTE_READWRITE,
3074 PAGE_WRITECOPY,
3075 PAGE_WRITECOPY,
3076 PAGE_WRITECOPY,
3077 PAGE_WRITECOPY,
3078 PAGE_EXECUTE_WRITECOPY,
3079 PAGE_EXECUTE_WRITECOPY,
3080 PAGE_EXECUTE_WRITECOPY,
3081 PAGE_EXECUTE_WRITECOPY
3082 };
3083
3084 unsigned ProtectionFlags;
3085
3086 /*
3087 * Extend the file size
3088 */
3089
3090 /* Unaligned segments must be contiguous within the file */
3091 if (Segment->FileOffset != (EffectiveSegment->FileOffset +
3092 EffectiveSegment->RawLength))
3093 {
3094 return FALSE;
3095 }
3096
3097 EffectiveSegment->RawLength += Segment->RawLength;
3098
3099 /*
3100 * Extend the virtual size
3101 */
3102 ASSERT(PAGE_ROUND_UP(Segment->VirtualAddress + Segment->Length) >= EndOfEffectiveSegment);
3103
3104 EffectiveSegment->Length = PAGE_ROUND_UP(Segment->VirtualAddress + Segment->Length) -
3105 EffectiveSegment->VirtualAddress;
3106
3107 /*
3108 * Merge the protection
3109 */
3110 EffectiveSegment->Protection |= Segment->Protection;
3111
3112 /* Clean up redundance */
3113 ProtectionFlags = 0;
3114
3115 if(EffectiveSegment->Protection & PAGE_IS_READABLE)
3116 ProtectionFlags |= 1 << 0;
3117
3118 if(EffectiveSegment->Protection & PAGE_IS_WRITABLE)
3119 ProtectionFlags |= 1 << 1;
3120
3121 if(EffectiveSegment->Protection & PAGE_IS_EXECUTABLE)
3122 ProtectionFlags |= 1 << 2;
3123
3124 if(EffectiveSegment->Protection & PAGE_IS_WRITECOPY)
3125 ProtectionFlags |= 1 << 3;
3126
3127 ASSERT(ProtectionFlags < 16);
3128 EffectiveSegment->Protection = FlagsToProtection[ProtectionFlags];
3129
3130 /* If a segment was required to be shared and cannot, fail */
3131 if(!(Segment->Protection & PAGE_IS_WRITECOPY) &&
3132 EffectiveSegment->Protection & PAGE_IS_WRITECOPY)
3133 {
3134 return FALSE;
3135 }
3136 }
3137 /*
3138 * We assume no holes between segments at this point
3139 */
3140 else
3141 {
3142 KeBugCheck(MEMORY_MANAGEMENT);
3143 }
3144 }
3145 }
3146 ImageSectionObject->NrSegments = LastSegment + 1;
3147
3148 return TRUE;
3149 }
3150
3151 NTSTATUS
3152 ExeFmtpCreateImageSection(HANDLE FileHandle,
3153 PMM_IMAGE_SECTION_OBJECT ImageSectionObject)
3154 {
3155 LARGE_INTEGER Offset;
3156 PVOID FileHeader;
3157 PVOID FileHeaderBuffer;
3158 ULONG FileHeaderSize;
3159 ULONG Flags;
3160 ULONG OldNrSegments;
3161 NTSTATUS Status;
3162 ULONG i;
3163
3164 /*
3165 * Read the beginning of the file (2 pages). Should be enough to contain
3166 * all (or most) of the headers
3167 */
3168 Offset.QuadPart = 0;
3169
3170 /* FIXME: use FileObject instead of FileHandle */
3171 Status = ExeFmtpReadFile (FileHandle,
3172 &Offset,
3173 PAGE_SIZE * 2,
3174 &FileHeader,
3175 &FileHeaderBuffer,
3176 &FileHeaderSize);
3177
3178 if (!NT_SUCCESS(Status))
3179 return Status;
3180
3181 if (FileHeaderSize == 0)
3182 {
3183 ExFreePool(FileHeaderBuffer);
3184 return STATUS_UNSUCCESSFUL;
3185 }
3186
3187 /*
3188 * Look for a loader that can handle this executable
3189 */
3190 for (i = 0; i < RTL_NUMBER_OF(ExeFmtpLoaders); ++ i)
3191 {
3192 RtlZeroMemory(ImageSectionObject, sizeof(*ImageSectionObject));
3193 Flags = 0;
3194
3195 /* FIXME: use FileObject instead of FileHandle */
3196 Status = ExeFmtpLoaders[i](FileHeader,
3197 FileHeaderSize,
3198 FileHandle,
3199 ImageSectionObject,
3200 &Flags,
3201 ExeFmtpReadFile,
3202 ExeFmtpAllocateSegments);
3203
3204 if (!NT_SUCCESS(Status))
3205 {
3206 if (ImageSectionObject->Segments)
3207 {
3208 ExFreePool(ImageSectionObject->Segments);
3209 ImageSectionObject->Segments = NULL;
3210 }
3211 }
3212
3213 if (Status != STATUS_ROS_EXEFMT_UNKNOWN_FORMAT)
3214 break;
3215 }
3216
3217 ExFreePoolWithTag(FileHeaderBuffer, TAG('M', 'm', 'X', 'r'));
3218
3219 /*
3220 * No loader handled the format
3221 */
3222 if (Status == STATUS_ROS_EXEFMT_UNKNOWN_FORMAT)
3223 {
3224 Status = STATUS_INVALID_IMAGE_NOT_MZ;
3225 ASSERT(!NT_SUCCESS(Status));
3226 }
3227
3228 if (!NT_SUCCESS(Status))
3229 return Status;
3230
3231 ASSERT(ImageSectionObject->Segments != NULL);
3232
3233 /*
3234 * Some defaults
3235 */
3236 /* FIXME? are these values platform-dependent? */
3237 if(ImageSectionObject->StackReserve == 0)
3238 ImageSectionObject->StackReserve = 0x40000;
3239
3240 if(ImageSectionObject->StackCommit == 0)
3241 ImageSectionObject->StackCommit = 0x1000;
3242
3243 if(ImageSectionObject->ImageBase == 0)
3244 {
3245 if(ImageSectionObject->ImageCharacteristics & IMAGE_FILE_DLL)
3246 ImageSectionObject->ImageBase = 0x10000000;
3247 else
3248 ImageSectionObject->ImageBase = 0x00400000;
3249 }
3250
3251 /*
3252 * And now the fun part: fixing the segments
3253 */
3254
3255 /* Sort them by virtual address */
3256 MmspSortSegments(ImageSectionObject, Flags);
3257
3258 /* Ensure they don't overlap in memory */
3259 if (!MmspCheckSegmentBounds(ImageSectionObject, Flags))
3260 return STATUS_INVALID_IMAGE_FORMAT;
3261
3262 /* Ensure they are aligned */
3263 OldNrSegments = ImageSectionObject->NrSegments;
3264
3265 if (!MmspPageAlignSegments(ImageSectionObject, Flags))
3266 return STATUS_INVALID_IMAGE_FORMAT;
3267
3268 /* Trim them if the alignment phase merged some of them */
3269 if (ImageSectionObject->NrSegments < OldNrSegments)
3270 {
3271 PMM_SECTION_SEGMENT Segments;
3272 SIZE_T SizeOfSegments;
3273
3274 SizeOfSegments = sizeof(MM_SECTION_SEGMENT) * ImageSectionObject->NrSegments;
3275
3276 Segments = ExAllocatePoolWithTag(PagedPool,
3277 SizeOfSegments,
3278 TAG_MM_SECTION_SEGMENT);
3279
3280 if (Segments == NULL)
3281 return STATUS_INSUFFICIENT_RESOURCES;
3282
3283 RtlCopyMemory(Segments, ImageSectionObject->Segments, SizeOfSegments);
3284 ExFreePool(ImageSectionObject->Segments);
3285 ImageSectionObject->Segments = Segments;
3286 }
3287
3288 /* And finish their initialization */
3289 for ( i = 0; i < ImageSectionObject->NrSegments; ++ i )
3290 {
3291 ExInitializeFastMutex(&ImageSectionObject->Segments[i].Lock);
3292 ImageSectionObject->Segments[i].ReferenceCount = 1;
3293
3294 RtlZeroMemory(&ImageSectionObject->Segments[i].PageDirectory,
3295 sizeof(ImageSectionObject->Segments[i].PageDirectory));
3296 }
3297
3298 ASSERT(NT_SUCCESS(Status));
3299 return Status;
3300 }
3301
3302 NTSTATUS
3303 MmCreateImageSection(PROS_SECTION_OBJECT *SectionObject,
3304 ACCESS_MASK DesiredAccess,
3305 POBJECT_ATTRIBUTES ObjectAttributes,
3306 PLARGE_INTEGER UMaximumSize,
3307 ULONG SectionPageProtection,
3308 ULONG AllocationAttributes,
3309 HANDLE FileHandle)
3310 {
3311 PROS_SECTION_OBJECT Section;
3312 NTSTATUS Status;
3313 PFILE_OBJECT FileObject;
3314 PMM_SECTION_SEGMENT SectionSegments;
3315 PMM_IMAGE_SECTION_OBJECT ImageSectionObject;
3316 ULONG i;
3317 ULONG FileAccess = 0;
3318
3319 /*
3320 * Specifying a maximum size is meaningless for an image section
3321 */
3322 if (UMaximumSize != NULL)
3323 {
3324 return(STATUS_INVALID_PARAMETER_4);
3325 }
3326
3327 /*
3328 * Check file access required
3329 */
3330 if (SectionPageProtection & PAGE_READWRITE ||
3331 SectionPageProtection & PAGE_EXECUTE_READWRITE)
3332 {
3333 FileAccess = FILE_READ_DATA | FILE_WRITE_DATA;
3334 }
3335 else
3336 {
3337 FileAccess = FILE_READ_DATA;
3338 }
3339
3340 /*
3341 * Reference the file handle
3342 */
3343 Status = ObReferenceObjectByHandle(FileHandle,
3344 FileAccess,
3345 IoFileObjectType,
3346 ExGetPreviousMode(),
3347 (PVOID*)(PVOID)&FileObject,
3348 NULL);
3349
3350 if (!NT_SUCCESS(Status))
3351 {
3352 return Status;
3353 }
3354
3355 /*
3356 * Create the section
3357 */
3358 Status = ObCreateObject (ExGetPreviousMode(),
3359 MmSectionObjectType,
3360 ObjectAttributes,
3361 ExGetPreviousMode(),
3362 NULL,
3363 sizeof(ROS_SECTION_OBJECT),
3364 0,
3365 0,
3366 (PVOID*)(PVOID)&Section);
3367 if (!NT_SUCCESS(Status))
3368 {
3369 ObDereferenceObject(FileObject);
3370 return(Status);
3371 }
3372
3373 /*
3374 * Initialize it
3375 */
3376 Section->SectionPageProtection = SectionPageProtection;
3377 Section->AllocationAttributes = AllocationAttributes;
3378
3379 /*
3380 * Initialized caching for this file object if previously caching
3381 * was initialized for the same on disk file
3382 */
3383 Status = CcTryToInitializeFileCache(FileObject);
3384
3385 if (!NT_SUCCESS(Status) || FileObject->SectionObjectPointer->ImageSectionObject == NULL)
3386 {
3387 NTSTATUS StatusExeFmt;
3388
3389 ImageSectionObject = ExAllocatePoolWithTag(PagedPool, sizeof(MM_IMAGE_SECTION_OBJECT), TAG_MM_SECTION_SEGMENT);
3390 if (ImageSectionObject == NULL)
3391 {
3392 ObDereferenceObject(FileObject);
3393 ObDereferenceObject(Section);
3394 return(STATUS_NO_MEMORY);
3395 }
3396
3397 RtlZeroMemory(ImageSectionObject, sizeof(MM_IMAGE_SECTION_OBJECT));
3398
3399 StatusExeFmt = ExeFmtpCreateImageSection(FileHandle, ImageSectionObject);
3400
3401 if (!NT_SUCCESS(StatusExeFmt))
3402 {
3403 if(ImageSectionObject->Segments != NULL)
3404 ExFreePool(ImageSectionObject->Segments);
3405
3406 ExFreePool(ImageSectionObject);
3407 ObDereferenceObject(Section);
3408 ObDereferenceObject(FileObject);
3409 return(StatusExeFmt);
3410 }
3411
3412 Section->ImageSection = ImageSectionObject;
3413 ASSERT(ImageSectionObject->Segments);
3414
3415 /*
3416 * Lock the file
3417 */
3418 Status = MmspWaitForFileLock(FileObject);
3419 if (!NT_SUCCESS(Status))
3420 {
3421 ExFreePool(ImageSectionObject->Segments);
3422 ExFreePool(ImageSectionObject);
3423 ObDereferenceObject(Section);
3424 ObDereferenceObject(FileObject);
3425 return(Status);
3426 }
3427
3428 if (NULL != InterlockedCompareExchangePointer(&FileObject->SectionObjectPointer->ImageSectionObject,
3429 ImageSectionObject, NULL))
3430 {
3431 /*
3432 * An other thread has initialized the same image in the background
3433 */
3434 ExFreePool(ImageSectionObject->Segments);
3435 ExFreePool(ImageSectionObject);
3436 ImageSectionObject = FileObject->SectionObjectPointer->ImageSectionObject;
3437 Section->ImageSection = ImageSectionObject;
3438 SectionSegments = ImageSectionObject->Segments;
3439
3440 for (i = 0; i < ImageSectionObject->NrSegments; i++)
3441 {
3442 (void)InterlockedIncrementUL(&SectionSegments[i].ReferenceCount);
3443 }
3444 }
3445
3446 Status = StatusExeFmt;
3447 }
3448 else
3449 {
3450 /*
3451 * Lock the file
3452 */
3453 Status = MmspWaitForFileLock(FileObject);
3454 if (Status != STATUS_SUCCESS)
3455 {
3456 ObDereferenceObject(Section);
3457 ObDereferenceObject(FileObject);
3458 return(Status);
3459 }
3460
3461 ImageSectionObject = FileObject->SectionObjectPointer->ImageSectionObject;
3462 Section->ImageSection = ImageSectionObject;
3463 SectionSegments = ImageSectionObject->Segments;
3464
3465 /*
3466 * Otherwise just reference all the section segments
3467 */
3468 for (i = 0; i < ImageSectionObject->NrSegments; i++)
3469 {
3470 (void)InterlockedIncrementUL(&SectionSegments[i].ReferenceCount);
3471 }
3472
3473 Status = STATUS_SUCCESS;
3474 }
3475 Section->FileObject = FileObject;
3476 CcRosReferenceCache(FileObject);
3477 //KeSetEvent((PVOID)&FileObject->Lock, IO_NO_INCREMENT, FALSE);
3478 *SectionObject = Section;
3479 return(Status);
3480 }
3481
3482 /*
3483 * @implemented
3484 */
3485 NTSTATUS NTAPI
3486 NtCreateSection (OUT PHANDLE SectionHandle,
3487 IN ACCESS_MASK DesiredAccess,
3488 IN POBJECT_ATTRIBUTES ObjectAttributes OPTIONAL,
3489 IN PLARGE_INTEGER MaximumSize OPTIONAL,
3490 IN ULONG SectionPageProtection OPTIONAL,
3491 IN ULONG AllocationAttributes,
3492 IN HANDLE FileHandle OPTIONAL)
3493 {
3494 LARGE_INTEGER SafeMaximumSize;
3495 PVOID SectionObject;
3496 KPROCESSOR_MODE PreviousMode;
3497 NTSTATUS Status = STATUS_SUCCESS;
3498
3499 PreviousMode = ExGetPreviousMode();
3500
3501 if(MaximumSize != NULL && PreviousMode != KernelMode)
3502 {
3503 _SEH2_TRY
3504 {
3505 /* make a copy on the stack */
3506 SafeMaximumSize = ProbeForReadLargeInteger(MaximumSize);
3507 MaximumSize = &SafeMaximumSize;
3508 }
3509 _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
3510 {
3511 Status = _SEH2_GetExceptionCode();
3512 }
3513 _SEH2_END;
3514
3515 if(!NT_SUCCESS(Status))
3516 {
3517 return Status;
3518 }
3519 }
3520
3521 Status = MmCreateSection(&SectionObject,
3522 DesiredAccess,
3523 ObjectAttributes,
3524 MaximumSize,
3525 SectionPageProtection,
3526 AllocationAttributes,
3527 FileHandle,
3528 NULL);
3529 if (NT_SUCCESS(Status))
3530 {
3531 Status = ObInsertObject ((PVOID)SectionObject,
3532 NULL,
3533 DesiredAccess,
3534 0,
3535 NULL,
3536 SectionHandle);
3537 }
3538
3539 return Status;
3540 }
3541
3542
3543 /**********************************************************************
3544 * NAME
3545 * NtOpenSection
3546 *
3547 * DESCRIPTION
3548 *
3549 * ARGUMENTS
3550 * SectionHandle
3551 *
3552 * DesiredAccess
3553 *
3554 * ObjectAttributes
3555 *
3556 * RETURN VALUE
3557 *
3558 * REVISIONS
3559 */
3560 NTSTATUS NTAPI
3561 NtOpenSection(PHANDLE SectionHandle,
3562 ACCESS_MASK DesiredAccess,
3563 POBJECT_ATTRIBUTES ObjectAttributes)
3564 {
3565 HANDLE hSection;
3566 KPROCESSOR_MODE PreviousMode;
3567 NTSTATUS Status = STATUS_SUCCESS;
3568
3569 PreviousMode = ExGetPreviousMode();
3570
3571 if(PreviousMode != KernelMode)
3572 {
3573 _SEH2_TRY
3574 {
3575 ProbeForWriteHandle(SectionHandle);
3576 }
3577 _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
3578 {
3579 Status = _SEH2_GetExceptionCode();
3580 }
3581 _SEH2_END;
3582
3583 if(!NT_SUCCESS(Status))
3584 {
3585 return Status;
3586 }
3587 }
3588
3589 Status = ObOpenObjectByName(ObjectAttributes,
3590 MmSectionObjectType,
3591 PreviousMode,
3592 NULL,
3593 DesiredAccess,
3594 NULL,
3595 &hSection);
3596
3597 if(NT_SUCCESS(Status))
3598 {
3599 _SEH2_TRY
3600 {
3601 *SectionHandle = hSection;
3602 }
3603 _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
3604 {
3605 Status = _SEH2_GetExceptionCode();
3606 }
3607 _SEH2_END;
3608 }
3609
3610 return(Status);
3611 }
3612
3613 static NTSTATUS
3614 MmMapViewOfSegment(PMMSUPPORT AddressSpace,
3615 PROS_SECTION_OBJECT Section,
3616 PMM_SECTION_SEGMENT Segment,
3617 PVOID* BaseAddress,
3618 SIZE_T ViewSize,
3619 ULONG Protect,
3620 ULONG ViewOffset,
3621 ULONG AllocationType)
3622 {
3623 PMEMORY_AREA MArea;
3624 NTSTATUS Status;
3625 PHYSICAL_ADDRESS BoundaryAddressMultiple;
3626
3627 BoundaryAddressMultiple.QuadPart = 0;
3628
3629 Status = MmCreateMemoryArea(AddressSpace,
3630 MEMORY_AREA_SECTION_VIEW,
3631 BaseAddress,
3632 ViewSize,
3633 Protect,
3634 &MArea,
3635 FALSE,
3636 AllocationType,
3637 BoundaryAddressMultiple);
3638 if (!NT_SUCCESS(Status))
3639 {
3640 DPRINT1("Mapping between 0x%.8X and 0x%.8X failed (%X).\n",
3641 (*BaseAddress), (char*)(*BaseAddress) + ViewSize, Status);
3642 return(Status);
3643 }
3644
3645 ObReferenceObject((PVOID)Section);
3646
3647 MArea->Data.SectionData.Segment = Segment;
3648 MArea->Data.SectionData.Section = Section;
3649 MArea->Data.SectionData.ViewOffset = ViewOffset;
3650 MArea->Data.SectionData.WriteCopyView = FALSE;
3651 MmInitializeRegion(&MArea->Data.SectionData.RegionListHead,
3652 ViewSize, 0, Protect);
3653
3654 return(STATUS_SUCCESS);
3655 }
3656
3657
3658 /**********************************************************************
3659 * NAME EXPORTED
3660 * NtMapViewOfSection
3661 *
3662 * DESCRIPTION
3663 * Maps a view of a section into the virtual address space of a
3664 * process.
3665 *
3666 * ARGUMENTS
3667 * SectionHandle
3668 * Handle of the section.
3669 *
3670 * ProcessHandle
3671 * Handle of the process.
3672 *
3673 * BaseAddress
3674 * Desired base address (or NULL) on entry;
3675 * Actual base address of the view on exit.
3676 *
3677 * ZeroBits
3678 * Number of high order address bits that must be zero.
3679 *
3680 * CommitSize
3681 * Size in bytes of the initially committed section of
3682 * the view.
3683 *
3684 * SectionOffset
3685 * Offset in bytes from the beginning of the section
3686 * to the beginning of the view.
3687 *
3688 * ViewSize
3689 * Desired length of map (or zero to map all) on entry
3690 * Actual length mapped on exit.
3691 *
3692 * InheritDisposition
3693 * Specified how the view is to be shared with
3694 * child processes.
3695 *
3696 * AllocateType
3697 * Type of allocation for the pages.
3698 *
3699 * Protect
3700 * Protection for the committed region of the view.
3701 *
3702 * RETURN VALUE
3703 * Status.
3704 *
3705 * @implemented
3706 */
3707 NTSTATUS NTAPI
3708 NtMapViewOfSection(IN HANDLE SectionHandle,
3709 IN HANDLE ProcessHandle,
3710 IN OUT PVOID* BaseAddress OPTIONAL,
3711 IN ULONG_PTR ZeroBits OPTIONAL,
3712 IN SIZE_T CommitSize,
3713 IN OUT PLARGE_INTEGER SectionOffset OPTIONAL,
3714 IN OUT PSIZE_T ViewSize,
3715 IN SECTION_INHERIT InheritDisposition,
3716 IN ULONG AllocationType OPTIONAL,
3717 IN ULONG Protect)
3718 {
3719 PVOID SafeBaseAddress;
3720 LARGE_INTEGER SafeSectionOffset;
3721 SIZE_T SafeViewSize;
3722 PROS_SECTION_OBJECT Section;
3723 PEPROCESS Process;
3724 KPROCESSOR_MODE PreviousMode;
3725 PMMSUPPORT AddressSpace;
3726 NTSTATUS Status = STATUS_SUCCESS;
3727 ULONG tmpProtect;
3728
3729 /*
3730 * Check the protection
3731 */
3732 if (Protect & ~PAGE_FLAGS_VALID_FROM_USER_MODE)
3733 {
3734 return STATUS_INVALID_PARAMETER_10;
3735 }
3736
3737 tmpProtect = Protect & ~(PAGE_GUARD|PAGE_NOCACHE);
3738 if (tmpProtect != PAGE_NOACCESS &&
3739 tmpProtect != PAGE_READONLY &&
3740 tmpProtect != PAGE_READWRITE &&
3741 tmpProtect != PAGE_WRITECOPY &&
3742 tmpProtect != PAGE_EXECUTE &&
3743 tmpProtect != PAGE_EXECUTE_READ &&
3744 tmpProtect != PAGE_EXECUTE_READWRITE &&
3745 tmpProtect != PAGE_EXECUTE_WRITECOPY)
3746 {
3747 return STATUS_INVALID_PAGE_PROTECTION;
3748 }
3749
3750 PreviousMode = ExGetPreviousMode();
3751
3752 if(PreviousMode != KernelMode)
3753 {
3754 SafeBaseAddress = NULL;
3755 SafeSectionOffset.QuadPart = 0;
3756 SafeViewSize = 0;
3757
3758 _SEH2_TRY
3759 {
3760 if(BaseAddress != NULL)
3761 {
3762 ProbeForWritePointer(BaseAddress);
3763 SafeBaseAddress = *BaseAddress;
3764 }
3765 if(SectionOffset != NULL)
3766 {
3767 ProbeForWriteLargeInteger(SectionOffset);
3768 SafeSectionOffset = *SectionOffset;
3769 }
3770 ProbeForWriteSize_t(ViewSize);
3771 SafeViewSize = *ViewSize;
3772 }
3773 _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
3774 {
3775 Status = _SEH2_GetExceptionCode();
3776 }
3777 _SEH2_END;
3778
3779 if(!NT_SUCCESS(Status))
3780 {
3781 return Status;
3782 }
3783 }
3784 else
3785 {
3786 SafeBaseAddress = (BaseAddress != NULL ? *BaseAddress : NULL);
3787 SafeSectionOffset.QuadPart = (SectionOffset != NULL ? SectionOffset->QuadPart : 0);
3788 SafeViewSize = (ViewSize != NULL ? *ViewSize : 0);
3789 }
3790
3791 SafeSectionOffset.LowPart = PAGE_ROUND_DOWN(SafeSectionOffset.LowPart);
3792
3793 Status = ObReferenceObjectByHandle(ProcessHandle,
3794 PROCESS_VM_OPERATION,
3795 PsProcessType,
3796 PreviousMode,
3797 (PVOID*)(PVOID)&Process,
3798 NULL);
3799 if (!NT_SUCCESS(Status))
3800 {
3801 return(Status);
3802 }
3803
3804 AddressSpace = &Process->Vm;
3805
3806 Status = ObReferenceObjectByHandle(SectionHandle,
3807 SECTION_MAP_READ,
3808 MmSectionObjectType,
3809 PreviousMode,
3810 (PVOID*)(PVOID)&Section,
3811 NULL);
3812 if (!(NT_SUCCESS(Status)))
3813 {
3814 DPRINT("ObReference failed rc=%x\n",Status);
3815 ObDereferenceObject(Process);
3816 return(Status);
3817 }
3818
3819 Status = MmMapViewOfSection(Section,
3820 (PEPROCESS)Process,
3821 (BaseAddress != NULL ? &SafeBaseAddress : NULL),
3822 ZeroBits,
3823 CommitSize,
3824 (SectionOffset != NULL ? &SafeSectionOffset : NULL),
3825 (ViewSize != NULL ? &SafeViewSize : NULL),
3826 InheritDisposition,
3827 AllocationType,
3828 Protect);
3829
3830 /* Check if this is an image for the current process */
3831 if ((Section->AllocationAttributes & SEC_IMAGE) &&
3832 (Process == PsGetCurrentProcess()) &&
3833 (Status != STATUS_IMAGE_NOT_AT_BASE))
3834 {
3835 /* Notify the debugger */
3836 DbgkMapViewOfSection(Section,
3837 SafeBaseAddress,
3838 SafeSectionOffset.LowPart,
3839 SafeViewSize);
3840 }
3841
3842 ObDereferenceObject(Section);
3843 ObDereferenceObject(Process);
3844
3845 if(NT_SUCCESS(Status))
3846 {
3847 /* copy parameters back to the caller */
3848 _SEH2_TRY
3849 {
3850 if(BaseAddress != NULL)
3851 {
3852 *BaseAddress = SafeBaseAddress;
3853 }
3854 if(SectionOffset != NULL)
3855 {
3856 *SectionOffset = SafeSectionOffset;
3857 }
3858 if(ViewSize != NULL)
3859 {
3860 *ViewSize = SafeViewSize;
3861 }
3862 }
3863 _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
3864 {
3865 Status = _SEH2_GetExceptionCode();
3866 }
3867 _SEH2_END;
3868 }
3869
3870 return(Status);
3871 }
3872
3873 static VOID
3874 MmFreeSectionPage(PVOID Context, MEMORY_AREA* MemoryArea, PVOID Address,
3875 PFN_TYPE Page, SWAPENTRY SwapEntry, BOOLEAN Dirty)
3876 {
3877 ULONG Entry;
3878 PFILE_OBJECT FileObject;
3879 PBCB Bcb;
3880 ULONG Offset;
3881 SWAPENTRY SavedSwapEntry;
3882 PMM_PAGEOP PageOp;
3883 NTSTATUS Status;
3884 PROS_SECTION_OBJECT Section;
3885 PMM_SECTION_SEGMENT Segment;
3886 PMMSUPPORT AddressSpace;
3887 PEPROCESS Process;
3888
3889 AddressSpace = (PMMSUPPORT)Context;
3890 Process = MmGetAddressSpaceOwner(AddressSpace);
3891
3892 Address = (PVOID)PAGE_ROUND_DOWN(Address);
3893
3894 Offset = ((ULONG_PTR)Address - (ULONG_PTR)MemoryArea->StartingAddress) +
3895 MemoryArea->Data.SectionData.ViewOffset;
3896
3897 Section = MemoryArea->Data.SectionData.Section;
3898 Segment = MemoryArea->Data.SectionData.Segment;
3899
3900 PageOp = MmCheckForPageOp(MemoryArea, NULL, NULL, Segment, Offset);
3901
3902 while (PageOp)
3903 {
3904 MmUnlockSectionSegment(Segment);
3905 MmUnlockAddressSpace(AddressSpace);
3906
3907 Status = MmspWaitForPageOpCompletionEvent(PageOp);
3908 if (Status != STATUS_SUCCESS)
3909 {
3910 DPRINT1("Failed to wait for page op, status = %x\n", Status);
3911 KeBugCheck(MEMORY_MANAGEMENT);
3912 }
3913
3914 MmLockAddressSpace(AddressSpace);
3915 MmLockSectionSegment(Segment);
3916 MmspCompleteAndReleasePageOp(PageOp);
3917 PageOp = MmCheckForPageOp(MemoryArea, NULL, NULL, Segment, Offset);
3918 }
3919
3920 Entry = MmGetPageEntrySectionSegment(Segment, Offset);
3921
3922 /*
3923 * For a dirty, datafile, non-private page mark it as dirty in the
3924 * cache manager.
3925 */
3926 if (Segment->Flags & MM_DATAFILE_SEGMENT)
3927 {
3928 if (Page == PFN_FROM_SSE(Entry) && Dirty)
3929 {
3930 FileObject = MemoryArea->Data.SectionData.Section->FileObject;
3931 Bcb = FileObject->SectionObjectPointer->SharedCacheMap;
3932 CcRosMarkDirtyCacheSegment(Bcb, Offset + Segment->FileOffset);
3933 ASSERT(SwapEntry == 0);
3934 }
3935 }
3936
3937 if (SwapEntry != 0)
3938 {
3939 /*
3940 * Sanity check
3941 */
3942 if (Segment->Flags & MM_PAGEFILE_SEGMENT)
3943 {
3944 DPRINT1("Found a swap entry for a page in a pagefile section.\n");
3945 KeBugCheck(MEMORY_MANAGEMENT);
3946 }
3947 MmFreeSwapPage(SwapEntry);
3948 }
3949 else if (Page != 0)
3950 {
3951 if (IS_SWAP_FROM_SSE(Entry) ||
3952 Page != PFN_FROM_SSE(Entry))
3953 {
3954 /*
3955 * Sanity check
3956 */
3957 if (Segment->Flags & MM_PAGEFILE_SEGMENT)
3958 {
3959 DPRINT1("Found a private page in a pagefile section.\n");
3960 KeBugCheck(MEMORY_MANAGEMENT);
3961 }
3962 /*
3963 * Just dereference private pages
3964 */
3965 SavedSwapEntry = MmGetSavedSwapEntryPage(Page);
3966 if (SavedSwapEntry != 0)
3967 {
3968 MmFreeSwapPage(SavedSwapEntry);
3969 MmSetSavedSwapEntryPage(Page, 0);
3970 }
3971 MmDeleteRmap(Page, Process, Address);
3972 MmReleasePageMemoryConsumer(MC_USER, Page);
3973 }
3974 else
3975 {
3976 MmDeleteRmap(Page, Process, Address);
3977 MmUnsharePageEntrySectionSegment(Section, Segment, Offset, Dirty, FALSE);
3978 }
3979 }
3980 }
3981
3982 static NTSTATUS
3983 MmUnmapViewOfSegment(PMMSUPPORT AddressSpace,
3984 PVOID BaseAddress)
3985 {
3986 NTSTATUS Status;
3987 PMEMORY_AREA MemoryArea;
3988 PROS_SECTION_OBJECT Section;
3989 PMM_SECTION_SEGMENT Segment;
3990 PLIST_ENTRY CurrentEntry;
3991 PMM_REGION CurrentRegion;
3992 PLIST_ENTRY RegionListHead;
3993
3994 MemoryArea = MmLocateMemoryAreaByAddress(AddressSpace,
3995 BaseAddress);
3996 if (MemoryArea == NULL)
3997 {
3998 return(STATUS_UNSUCCESSFUL);
3999 }
4000
4001 MemoryArea->DeleteInProgress = TRUE;
4002 Section = MemoryArea->Data.SectionData.Section;
4003 Segment = MemoryArea->Data.SectionData.Segment;
4004
4005 MmLockSectionSegment(Segment);
4006
4007 RegionListHead = &MemoryArea->Data.SectionData.RegionListHead;
4008 while (!IsListEmpty(RegionListHead))
4009 {
4010 CurrentEntry = RemoveHeadList(RegionListHead);
4011 CurrentRegion = CONTAINING_RECORD(CurrentEntry, MM_REGION, RegionListEntry);
4012 ExFreePoolWithTag(CurrentRegion, TAG_MM_REGION);
4013 }
4014
4015 if (Section->AllocationAttributes & SEC_PHYSICALMEMORY)
4016 {
4017 Status = MmFreeMemoryArea(AddressSpace,
4018 MemoryArea,
4019 NULL,
4020 NULL);
4021 }
4022 else
4023 {
4024 Status = MmFreeMemoryArea(AddressSpace,
4025 MemoryArea,
4026 MmFreeSectionPage,
4027 AddressSpace);
4028 }
4029 MmUnlockSectionSegment(Segment);
4030 ObDereferenceObject(Section);
4031 return(STATUS_SUCCESS);
4032 }
4033
4034 /*
4035 * @implemented
4036 */
4037 NTSTATUS NTAPI
4038 MmUnmapViewOfSection(PEPROCESS Process,
4039 PVOID BaseAddress)
4040 {
4041 NTSTATUS Status;
4042 PMEMORY_AREA MemoryArea;
4043 PMMSUPPORT AddressSpace;
4044 PROS_SECTION_OBJECT Section;
4045 PMM_PAGEOP PageOp;
4046 ULONG_PTR Offset;
4047 PVOID ImageBaseAddress = 0;
4048
4049 DPRINT("Opening memory area Process %x BaseAddress %x\n",
4050 Process, BaseAddress);
4051
4052 ASSERT(Process);
4053
4054 AddressSpace = &Process->Vm;
4055
4056 MmLockAddressSpace(AddressSpace);
4057 MemoryArea = MmLocateMemoryAreaByAddress(AddressSpace,
4058 BaseAddress);
4059 if (MemoryArea == NULL ||
4060 MemoryArea->Type != MEMORY_AREA_SECTION_VIEW ||
4061 MemoryArea->DeleteInProgress)
4062 {
4063 MmUnlockAddressSpace(AddressSpace);
4064 return STATUS_NOT_MAPPED_VIEW;
4065 }
4066
4067 MemoryArea->DeleteInProgress = TRUE;
4068
4069 while (MemoryArea->PageOpCount)
4070 {
4071 Offset = PAGE_ROUND_UP((ULONG_PTR)MemoryArea->EndingAddress - (ULONG_PTR)MemoryArea->StartingAddress);
4072
4073 while (Offset)
4074 {
4075 Offset -= PAGE_SIZE;
4076 PageOp = MmCheckForPageOp(MemoryArea, NULL, NULL,
4077 MemoryArea->Data.SectionData.Segment,
4078 Offset + MemoryArea->Data.SectionData.ViewOffset);
4079 if (PageOp)
4080 {
4081 MmUnlockAddressSpace(AddressSpace);
4082 Status = MmspWaitForPageOpCompletionEvent(PageOp);
4083 if (Status != STATUS_SUCCESS)
4084 {
4085 DPRINT1("Failed to wait for page op, status = %x\n", Status);
4086 KeBugCheck(MEMORY_MANAGEMENT);
4087 }
4088 MmLockAddressSpace(AddressSpace);
4089 MemoryArea = MmLocateMemoryAreaByAddress(AddressSpace,
4090 BaseAddress);
4091 if (MemoryArea == NULL ||
4092 MemoryArea->Type != MEMORY_AREA_SECTION_VIEW)
4093 {
4094 MmUnlockAddressSpace(AddressSpace);
4095 return STATUS_NOT_MAPPED_VIEW;
4096 }
4097 break;
4098 }
4099 }
4100 }
4101
4102 Section = MemoryArea->Data.SectionData.Section;
4103
4104 if (Section->AllocationAttributes & SEC_IMAGE)
4105 {
4106 ULONG i;
4107 ULONG NrSegments;
4108 PMM_IMAGE_SECTION_OBJECT ImageSectionObject;
4109 PMM_SECTION_SEGMENT SectionSegments;
4110 PMM_SECTION_SEGMENT Segment;
4111
4112 Segment = MemoryArea->Data.SectionData.Segment;
4113 ImageSectionObject = Section->ImageSection;
4114 SectionSegments = ImageSectionObject->Segments;
4115 NrSegments = ImageSectionObject->NrSegments;
4116
4117 /* Search for the current segment within the section segments
4118 * and calculate the image base address */
4119 for (i = 0; i < NrSegments; i++)
4120 {
4121 if (!(SectionSegments[i].Characteristics & IMAGE_SCN_TYPE_NOLOAD))
4122 {
4123 if (Segment == &SectionSegments[i])
4124 {
4125 ImageBaseAddress = (char*)BaseAddress - (ULONG_PTR)SectionSegments[i].VirtualAddress;
4126 break;
4127 }
4128 }
4129 }
4130 if (i >= NrSegments)
4131 {
4132 KeBugCheck(MEMORY_MANAGEMENT);
4133 }
4134
4135 for (i = 0; i < NrSegments; i++)
4136 {
4137 if (!(SectionSegments[i].Characteristics & IMAGE_SCN_TYPE_NOLOAD))
4138 {
4139 PVOID SBaseAddress = (PVOID)
4140 ((char*)ImageBaseAddress + (ULONG_PTR)SectionSegments[i].VirtualAddress);
4141
4142 Status = MmUnmapViewOfSegment(AddressSpace, SBaseAddress);
4143 }
4144 }
4145 }
4146 else
4147 {
4148 Status = MmUnmapViewOfSegment(AddressSpace, BaseAddress);
4149 }
4150
4151 /* Notify debugger */
4152 if (ImageBaseAddress) DbgkUnMapViewOfSection(ImageBaseAddress);
4153
4154 MmUnlockAddressSpace(AddressSpace);
4155 return(STATUS_SUCCESS);
4156 }
4157
4158 /**********************************************************************
4159 * NAME EXPORTED
4160 * NtUnmapViewOfSection
4161 *
4162 * DESCRIPTION
4163 *
4164 * ARGUMENTS
4165 * ProcessHandle
4166 *
4167 * BaseAddress
4168 *
4169 * RETURN VALUE
4170 * Status.
4171 *
4172 * REVISIONS
4173 */
4174 NTSTATUS NTAPI
4175 NtUnmapViewOfSection (HANDLE ProcessHandle,
4176 PVOID BaseAddress)
4177 {
4178 PEPROCESS Process;
4179 KPROCESSOR_MODE PreviousMode;
4180 NTSTATUS Status;
4181
4182 DPRINT("NtUnmapViewOfSection(ProcessHandle %x, BaseAddress %x)\n",
4183 ProcessHandle, BaseAddress);
4184
4185 PreviousMode = ExGetPreviousMode();
4186
4187 DPRINT("Referencing process\n");
4188 Status = ObReferenceObjectByHandle(ProcessHandle,
4189 PROCESS_VM_OPERATION,
4190 PsProcessType,
4191 PreviousMode,
4192 (PVOID*)(PVOID)&Process,
4193 NULL);
4194 if (!NT_SUCCESS(Status))
4195 {
4196 DPRINT("ObReferenceObjectByHandle failed (Status %x)\n", Status);
4197 return(Status);
4198 }
4199
4200 Status = MmUnmapViewOfSection(Process, BaseAddress);
4201
4202 ObDereferenceObject(Process);
4203
4204 return Status;
4205 }
4206
4207
4208 /**
4209 * Queries the information of a section object.
4210 *
4211 * @param SectionHandle
4212 * Handle to the section object. It must be opened with SECTION_QUERY
4213 * access.
4214 * @param SectionInformationClass
4215 * Index to a certain information structure. Can be either
4216 * SectionBasicInformation or SectionImageInformation. The latter
4217 * is valid only for sections that were created with the SEC_IMAGE
4218 * flag.
4219 * @param SectionInformation
4220 * Caller supplies storage for resulting information.
4221 * @param Length
4222 * Size of the supplied storage.
4223 * @param ResultLength
4224 * Data written.
4225 *
4226 * @return Status.
4227 *
4228 * @implemented
4229 */
4230 NTSTATUS NTAPI
4231 NtQuerySection(IN HANDLE SectionHandle,
4232 IN SECTION_INFORMATION_CLASS SectionInformationClass,
4233 OUT PVOID SectionInformation,
4234 IN ULONG SectionInformationLength,
4235 OUT PULONG ResultLength OPTIONAL)
4236 {
4237 PROS_SECTION_OBJECT Section;
4238 KPROCESSOR_MODE PreviousMode;
4239 NTSTATUS Status = STATUS_SUCCESS;
4240
4241 PreviousMode = ExGetPreviousMode();
4242
4243 Status = DefaultQueryInfoBufferCheck(SectionInformationClass,
4244 ExSectionInfoClass,
4245 sizeof(ExSectionInfoClass) / sizeof(ExSectionInfoClass[0]),
4246 SectionInformation,
4247 SectionInformationLength,
4248 ResultLength,
4249 PreviousMode);
4250
4251 if(!NT_SUCCESS(Status))
4252 {
4253 DPRINT1("NtQuerySection() failed, Status: 0x%x\n", Status);
4254 return Status;
4255 }
4256
4257 Status = ObReferenceObjectByHandle(SectionHandle,
4258 SECTION_QUERY,
4259 MmSectionObjectType,
4260 PreviousMode,
4261 (PVOID*)(PVOID)&Section,
4262 NULL);
4263 if (NT_SUCCESS(Status))
4264 {
4265 switch (SectionInformationClass)
4266 {
4267 case SectionBasicInformation:
4268 {
4269 PSECTION_BASIC_INFORMATION Sbi = (PSECTION_BASIC_INFORMATION)SectionInformation;
4270
4271 _SEH2_TRY
4272 {
4273 Sbi->Attributes = Section->AllocationAttributes;
4274 if (Section->AllocationAttributes & SEC_IMAGE)
4275 {
4276 Sbi->BaseAddress = 0;
4277 Sbi->Size.QuadPart = 0;
4278 }
4279 else
4280 {
4281 Sbi->BaseAddress = (PVOID)Section->Segment->VirtualAddress;
4282 Sbi->Size.QuadPart = Section->Segment->Length;
4283 }
4284
4285 if (ResultLength != NULL)
4286 {
4287 *ResultLength = sizeof(SECTION_BASIC_INFORMATION);
4288 }
4289 Status = STATUS_SUCCESS;
4290 }
4291 _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
4292 {
4293 Status = _SEH2_GetExceptionCode();
4294 }
4295 _SEH2_END;
4296
4297 break;
4298 }
4299
4300 case SectionImageInformation:
4301 {
4302 PSECTION_IMAGE_INFORMATION Sii = (PSECTION_IMAGE_INFORMATION)SectionInformation;
4303
4304 _SEH2_TRY
4305 {
4306 memset(Sii, 0, sizeof(SECTION_IMAGE_INFORMATION));
4307 if (Section->AllocationAttributes & SEC_IMAGE)
4308 {
4309 PMM_IMAGE_SECTION_OBJECT ImageSectionObject;
4310 ImageSectionObject = Section->ImageSection;
4311
4312 Sii->TransferAddress = (PVOID)ImageSectionObject->EntryPoint;
4313 Sii->MaximumStackSize = ImageSectionObject->StackReserve;
4314 Sii->CommittedStackSize = ImageSectionObject->StackCommit;
4315 Sii->SubSystemType = ImageSectionObject->Subsystem;
4316 Sii->SubSystemMinorVersion = ImageSectionObject->MinorSubsystemVersion;
4317 Sii->SubSystemMajorVersion = ImageSectionObject->MajorSubsystemVersion;
4318 Sii->ImageCharacteristics = ImageSectionObject->ImageCharacteristics;
4319 Sii->Machine = ImageSectionObject->Machine;
4320 Sii->ImageContainsCode = ImageSectionObject->Executable;
4321 }
4322
4323 if (ResultLength != NULL)
4324 {
4325 *ResultLength = sizeof(SECTION_IMAGE_INFORMATION);
4326 }
4327 Status = STATUS_SUCCESS;
4328 }
4329 _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
4330 {
4331 Status = _SEH2_GetExceptionCode();
4332 }
4333 _SEH2_END;
4334
4335 break;
4336 }
4337 }
4338
4339 ObDereferenceObject(Section);
4340 }
4341
4342 return(Status);
4343 }
4344
4345
4346 /**
4347 * Extends size of file backed section.
4348 *
4349 * @param SectionHandle
4350 * Handle to the section object. It must be opened with
4351 * SECTION_EXTEND_SIZE access.
4352 * @param NewMaximumSize
4353 * New maximum size of the section in bytes.
4354 *
4355 * @return Status.
4356 *
4357 * @todo Move the actual code to internal function MmExtendSection.
4358 * @unimplemented
4359 */
4360 NTSTATUS NTAPI
4361 NtExtendSection(IN HANDLE SectionHandle,
4362 IN PLARGE_INTEGER NewMaximumSize)
4363 {
4364 LARGE_INTEGER SafeNewMaximumSize;
4365 PROS_SECTION_OBJECT Section;
4366 KPROCESSOR_MODE PreviousMode;
4367 NTSTATUS Status = STATUS_SUCCESS;
4368
4369 PreviousMode = ExGetPreviousMode();
4370
4371 if(PreviousMode != KernelMode)
4372 {
4373 _SEH2_TRY
4374 {
4375 /* make a copy on the stack */
4376 SafeNewMaximumSize = ProbeForReadLargeInteger(NewMaximumSize);
4377 NewMaximumSize = &SafeNewMaximumSize;
4378 }
4379 _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
4380 {
4381 Status = _SEH2_GetExceptionCode();
4382 }
4383 _SEH2_END;
4384
4385 if(!NT_SUCCESS(Status))
4386 {
4387 return Status;
4388 }
4389 }
4390
4391 Status = ObReferenceObjectByHandle(SectionHandle,
4392 SECTION_EXTEND_SIZE,
4393 MmSectionObjectType,
4394 PreviousMode,
4395 (PVOID*)&Section,
4396 NULL);
4397 if (!NT_SUCCESS(Status))
4398 {
4399 return Status;
4400 }
4401
4402 if (!(Section->AllocationAttributes & SEC_FILE))
4403 {
4404 ObfDereferenceObject(Section);
4405 return STATUS_INVALID_PARAMETER;
4406 }
4407
4408 /*
4409 * - Acquire file extneding resource.
4410 * - Check if we're not resizing the section below it's actual size!
4411 * - Extend segments if needed.
4412 * - Set file information (FileAllocationInformation) to the new size.
4413 * - Release file extending resource.
4414 */
4415
4416 ObDereferenceObject(Section);
4417
4418 return STATUS_NOT_IMPLEMENTED;
4419 }
4420
4421
4422 /**********************************************************************
4423 * NAME INTERNAL
4424 * MmAllocateSection@4
4425 *
4426 * DESCRIPTION
4427 *
4428 * ARGUMENTS
4429 * Length
4430 *
4431 * RETURN VALUE
4432 *
4433 * NOTE
4434 * Code taken from ntoskrnl/mm/special.c.
4435 *
4436 * REVISIONS
4437 */
4438 PVOID NTAPI
4439 MmAllocateSection (IN ULONG Length, PVOID BaseAddress)
4440 {
4441 PVOID Result;
4442 MEMORY_AREA* marea;
4443 NTSTATUS Status;
4444 PMMSUPPORT AddressSpace;
4445 PHYSICAL_ADDRESS BoundaryAddressMultiple;
4446
4447 DPRINT("MmAllocateSection(Length %x)\n",Length);
4448
4449 BoundaryAddressMultiple.QuadPart = 0;
4450
4451 AddressSpace = MmGetKernelAddressSpace();
4452 Result = BaseAddress;
4453 MmLockAddressSpace(AddressSpace);
4454 Status = MmCreateMemoryArea (AddressSpace,
4455 MEMORY_AREA_SYSTEM,
4456 &Result,
4457 Length,
4458 0,
4459 &marea,
4460 FALSE,
4461 0,
4462 BoundaryAddressMultiple);
4463 MmUnlockAddressSpace(AddressSpace);
4464
4465 if (!NT_SUCCESS(Status))
4466 {
4467 return (NULL);
4468 }
4469 DPRINT("Result %p\n",Result);
4470
4471 /* Create a virtual mapping for this memory area */
4472 MmMapMemoryArea(Result, Length, MC_NPPOOL, PAGE_READWRITE);
4473
4474 return ((PVOID)Result);
4475 }
4476
4477
4478 /**********************************************************************
4479 * NAME EXPORTED
4480 * MmMapViewOfSection
4481 *
4482 * DESCRIPTION
4483 * Maps a view of a section into the virtual address space of a
4484 * process.
4485 *
4486 * ARGUMENTS
4487 * Section
4488 * Pointer to the section object.
4489 *
4490 * ProcessHandle
4491 * Pointer to the process.
4492 *
4493 * BaseAddress
4494 * Desired base address (or NULL) on entry;
4495 * Actual base address of the view on exit.
4496 *
4497 * ZeroBits
4498 * Number of high order address bits that must be zero.
4499 *
4500 * CommitSize
4501 * Size in bytes of the initially committed section of
4502 * the view.
4503 *
4504 * SectionOffset
4505 * Offset in bytes from the beginning of the section
4506 * to the beginning of the view.
4507 *
4508 * ViewSize
4509 * Desired length of map (or zero to map all) on entry
4510 * Actual length mapped on exit.
4511 *
4512 * InheritDisposition
4513 * Specified how the view is to be shared with
4514 * child processes.
4515 *
4516 * AllocationType
4517 * Type of allocation for the pages.
4518 *
4519 * Protect
4520 * Protection for the committed region of the view.
4521 *
4522 * RETURN VALUE
4523 * Status.
4524 *
4525 * @implemented
4526 */
4527 NTSTATUS NTAPI
4528 MmMapViewOfSection(IN PVOID SectionObject,
4529 IN PEPROCESS Process,
4530 IN OUT PVOID *BaseAddress,
4531 IN ULONG_PTR ZeroBits,
4532 IN SIZE_T CommitSize,
4533 IN OUT PLARGE_INTEGER SectionOffset OPTIONAL,
4534 IN OUT PSIZE_T ViewSize,
4535 IN SECTION_INHERIT InheritDisposition,
4536 IN ULONG AllocationType,
4537 IN ULONG Protect)
4538 {
4539 PROS_SECTION_OBJECT Section;
4540 PMMSUPPORT AddressSpace;
4541 ULONG ViewOffset;
4542 NTSTATUS Status = STATUS_SUCCESS;
4543
4544 ASSERT(Process);
4545
4546 if (!Protect || Protect & ~PAGE_FLAGS_VALID_FOR_SECTION)
4547 {
4548 return STATUS_INVALID_PAGE_PROTECTION;
4549 }
4550
4551
4552 Section = (PROS_SECTION_OBJECT)SectionObject;
4553 AddressSpace = &Process->Vm;
4554
4555 AllocationType |= (Section->AllocationAttributes & SEC_NO_CHANGE);
4556
4557 MmLockAddressSpace(AddressSpace);
4558
4559 if (Section->AllocationAttributes & SEC_IMAGE)
4560 {
4561 ULONG i;
4562 ULONG NrSegments;
4563 ULONG_PTR ImageBase;
4564 ULONG ImageSize;
4565 PMM_IMAGE_SECTION_OBJECT ImageSectionObject;
4566 PMM_SECTION_SEGMENT SectionSegments;
4567
4568 ImageSectionObject = Section->ImageSection;
4569 SectionSegments = ImageSectionObject->Segments;
4570 NrSegments = ImageSectionObject->NrSegments;
4571
4572
4573 ImageBase = (ULONG_PTR)*BaseAddress;
4574 if (ImageBase == 0)
4575 {
4576 ImageBase = ImageSectionObject->ImageBase;
4577 }
4578
4579 ImageSize = 0;
4580 for (i = 0; i < NrSegments; i++)
4581 {
4582 if (!(SectionSegments[i].Characteristics & IMAGE_SCN_TYPE_NOLOAD))
4583 {
4584 ULONG_PTR MaxExtent;
4585 MaxExtent = (ULONG_PTR)SectionSegments[i].VirtualAddress +
4586 SectionSegments[i].Length;
4587 ImageSize = max(ImageSize, MaxExtent);
4588 }
4589 }
4590
4591 ImageSectionObject->ImageSize = ImageSize;
4592
4593 /* Check there is enough space to map the section at that point. */
4594 if (MmLocateMemoryAreaByRegion(AddressSpace, (PVOID)ImageBase,
4595 PAGE_ROUND_UP(ImageSize)) != NULL)
4596 {
4597 /* Fail if the user requested a fixed base address. */
4598 if ((*BaseAddress) != NULL)
4599 {
4600 MmUnlockAddressSpace(AddressSpace);
4601 return(STATUS_UNSUCCESSFUL);
4602 }
4603 /* Otherwise find a gap to map the image. */
4604 ImageBase = (ULONG_PTR)MmFindGap(AddressSpace, PAGE_ROUND_UP(ImageSize), PAGE_SIZE, FALSE);
4605 if (ImageBase == 0)
4606 {
4607 MmUnlockAddressSpace(AddressSpace);
4608 return(STATUS_UNSUCCESSFUL);
4609 }
4610 }
4611
4612 for (i = 0; i < NrSegments; i++)
4613 {
4614 if (!(SectionSegments[i].Characteristics & IMAGE_SCN_TYPE_NOLOAD))
4615 {
4616 PVOID SBaseAddress = (PVOID)
4617 ((char*)ImageBase + (ULONG_PTR)SectionSegments[i].VirtualAddress);
4618 MmLockSectionSegment(&SectionSegments[i]);
4619 Status = MmMapViewOfSegment(AddressSpace,
4620 Section,
4621 &SectionSegments[i],
4622 &SBaseAddress,
4623 SectionSegments[i].Length,
4624 SectionSegments[i].Protection,
4625 0,
4626 0);
4627 MmUnlockSectionSegment(&SectionSegments[i]);
4628 if (!NT_SUCCESS(Status))
4629 {
4630 MmUnlockAddressSpace(AddressSpace);
4631 return(Status);
4632 }
4633 }
4634 }
4635
4636 *BaseAddress = (PVOID)ImageBase;
4637 }
4638 else
4639 {
4640 /* check for write access */
4641 if ((Protect & (PAGE_READWRITE|PAGE_EXECUTE_READWRITE)) &&
4642 !(Section->SectionPageProtection & (PAGE_READWRITE|PAGE_EXECUTE_READWRITE)))
4643 {
4644 MmUnlockAddressSpace(AddressSpace);
4645 return STATUS_SECTION_PROTECTION;
4646 }
4647 /* check for read access */
4648 if ((Protect & (PAGE_READONLY|PAGE_WRITECOPY|PAGE_EXECUTE_READ|PAGE_EXECUTE_WRITECOPY)) &&
4649 !(Section->SectionPageProtection & (PAGE_READONLY|PAGE_READWRITE|PAGE_WRITECOPY|PAGE_EXECUTE_READ|PAGE_EXECUTE_READWRITE|PAGE_EXECUTE_WRITECOPY)))
4650 {
4651 MmUnlockAddressSpace(AddressSpace);
4652 return STATUS_SECTION_PROTECTION;
4653 }
4654 /* check for execute access */
4655 if ((Protect & (PAGE_EXECUTE|PAGE_EXECUTE_READ|PAGE_EXECUTE_READWRITE|PAGE_EXECUTE_WRITECOPY)) &&
4656 !(Section->SectionPageProtection & (PAGE_EXECUTE|PAGE_EXECUTE_READ|PAGE_EXECUTE_READWRITE|PAGE_EXECUTE_WRITECOPY)))
4657 {
4658 MmUnlockAddressSpace(AddressSpace);
4659 return STATUS_SECTION_PROTECTION;
4660 }
4661
4662 if (ViewSize == NULL)
4663 {
4664 /* Following this pointer would lead to us to the dark side */
4665 /* What to do? Bugcheck? Return status? Do the mambo? */
4666 KeBugCheck(MEMORY_MANAGEMENT);
4667 }
4668
4669 if (SectionOffset == NULL)
4670 {
4671 ViewOffset = 0;
4672 }
4673 else
4674 {
4675 ViewOffset = SectionOffset->u.LowPart;
4676 }
4677
4678 if ((ViewOffset % PAGE_SIZE) != 0)
4679 {
4680 MmUnlockAddressSpace(AddressSpace);
4681 return(STATUS_MAPPED_ALIGNMENT);
4682 }
4683
4684 if ((*ViewSize) == 0)
4685 {
4686 (*ViewSize) = Section->MaximumSize.u.LowPart - ViewOffset;
4687 }
4688 else if (((*ViewSize)+ViewOffset) > Section->MaximumSize.u.LowPart)
4689 {
4690 (*ViewSize) = Section->MaximumSize.u.LowPart - ViewOffset;
4691 }
4692
4693 *ViewSize = PAGE_ROUND_UP(*ViewSize);
4694
4695 MmLockSectionSegment(Section->Segment);
4696 Status = MmMapViewOfSegment(AddressSpace,
4697 Section,
4698 Section->Segment,
4699 BaseAddress,
4700 *ViewSize,
4701 Protect,
4702 ViewOffset,
4703 AllocationType & (MEM_TOP_DOWN|SEC_NO_CHANGE));
4704 MmUnlockSectionSegment(Section->Segment);
4705 if (!NT_SUCCESS(Status))
4706 {
4707 MmUnlockAddressSpace(AddressSpace);
4708 return(Status);
4709 }
4710 }
4711
4712 MmUnlockAddressSpace(AddressSpace);
4713
4714 return(STATUS_SUCCESS);
4715 }
4716
4717 /*
4718 * @unimplemented
4719 */
4720 BOOLEAN NTAPI
4721 MmCanFileBeTruncated (IN PSECTION_OBJECT_POINTERS SectionObjectPointer,
4722 IN PLARGE_INTEGER NewFileSize)
4723 {
4724 /* Check whether an ImageSectionObject exists */
4725 if (SectionObjectPointer->ImageSectionObject != NULL)
4726 {
4727 DPRINT1("ERROR: File can't be truncated because it has an image section\n");
4728 return FALSE;
4729 }
4730
4731 if (SectionObjectPointer->DataSectionObject != NULL)
4732 {
4733 PMM_SECTION_SEGMENT Segment;
4734
4735 Segment = (PMM_SECTION_SEGMENT)SectionObjectPointer->
4736 DataSectionObject;
4737
4738 if (Segment->ReferenceCount != 0)
4739 {
4740 /* Check size of file */
4741 if (SectionObjectPointer->SharedCacheMap)
4742 {
4743 PBCB Bcb = SectionObjectPointer->SharedCacheMap;
4744 if (NewFileSize->QuadPart <= Bcb->FileSize.QuadPart)
4745 {
4746 return FALSE;
4747 }
4748 }
4749 }
4750 else
4751 {
4752 /* Something must gone wrong
4753 * how can we have a Section but no
4754 * reference? */
4755 DPRINT1("ERROR: DataSectionObject without reference!\n");
4756 }
4757 }
4758
4759 DPRINT("FIXME: didn't check for outstanding write probes\n");
4760
4761 return TRUE;
4762 }
4763
4764
4765 /*
4766 * @unimplemented
4767 */
4768 BOOLEAN NTAPI
4769 MmDisableModifiedWriteOfSection (ULONG Unknown0)
4770 {
4771 UNIMPLEMENTED;
4772 return (FALSE);
4773 }
4774
4775 /*
4776 * @implemented
4777 */
4778 BOOLEAN NTAPI
4779 MmFlushImageSection (IN PSECTION_OBJECT_POINTERS SectionObjectPointer,
4780 IN MMFLUSH_TYPE FlushType)
4781 {
4782 switch(FlushType)
4783 {
4784 case MmFlushForDelete:
4785 if (SectionObjectPointer->ImageSectionObject ||
4786 SectionObjectPointer->DataSectionObject)
4787 {
4788 return FALSE;
4789 }
4790 CcRosSetRemoveOnClose(SectionObjectPointer);
4791 return TRUE;
4792 case MmFlushForWrite:
4793 break;
4794 }
4795 return FALSE;
4796 }
4797
4798 /*
4799 * @unimplemented
4800 */
4801 BOOLEAN NTAPI
4802 MmForceSectionClosed (
4803 IN PSECTION_OBJECT_POINTERS SectionObjectPointer,
4804 IN BOOLEAN DelayClose)
4805 {
4806 UNIMPLEMENTED;
4807 return (FALSE);
4808 }
4809
4810
4811 /*
4812 * @implemented
4813 */
4814 NTSTATUS NTAPI
4815 MmMapViewInSystemSpace (IN PVOID SectionObject,
4816 OUT PVOID * MappedBase,
4817 IN OUT PULONG ViewSize)
4818 {
4819 PROS_SECTION_OBJECT Section;
4820 PMMSUPPORT AddressSpace;
4821 NTSTATUS Status;
4822
4823 DPRINT("MmMapViewInSystemSpace() called\n");
4824
4825 Section = (PROS_SECTION_OBJECT)SectionObject;
4826 AddressSpace = MmGetKernelAddressSpace();
4827
4828 MmLockAddressSpace(AddressSpace);
4829
4830
4831 if ((*ViewSize) == 0)
4832 {
4833 (*ViewSize) = Section->MaximumSize.u.LowPart;
4834 }
4835 else if ((*ViewSize) > Section->MaximumSize.u.LowPart)
4836 {
4837 (*ViewSize) = Section->MaximumSize.u.LowPart;
4838 }
4839
4840 MmLockSectionSegment(Section->Segment);
4841
4842
4843 Status = MmMapViewOfSegment(AddressSpace,
4844 Section,
4845 Section->Segment,
4846 MappedBase,
4847 *ViewSize,
4848 PAGE_READWRITE,
4849 0,
4850 0);
4851
4852 MmUnlockSectionSegment(Section->Segment);
4853 MmUnlockAddressSpace(AddressSpace);
4854
4855 return Status;
4856 }
4857
4858 /*
4859 * @unimplemented
4860 */
4861 NTSTATUS
4862 NTAPI
4863 MmMapViewInSessionSpace (
4864 IN PVOID Section,
4865 OUT PVOID *MappedBase,
4866 IN OUT PSIZE_T ViewSize
4867 )
4868 {
4869 UNIMPLEMENTED;
4870 return STATUS_NOT_IMPLEMENTED;
4871 }
4872
4873
4874 /*
4875 * @implemented
4876 */
4877 NTSTATUS NTAPI
4878 MmUnmapViewInSystemSpace (IN PVOID MappedBase)
4879 {
4880 PMMSUPPORT AddressSpace;
4881 NTSTATUS Status;
4882
4883 DPRINT("MmUnmapViewInSystemSpace() called\n");
4884
4885 AddressSpace = MmGetKernelAddressSpace();
4886
4887 Status = MmUnmapViewOfSegment(AddressSpace, MappedBase);
4888
4889 return Status;
4890 }
4891
4892 /*
4893 * @unimplemented
4894 */
4895 NTSTATUS
4896 NTAPI
4897 MmUnmapViewInSessionSpace (
4898 IN PVOID MappedBase
4899 )
4900 {
4901 UNIMPLEMENTED;
4902 return STATUS_NOT_IMPLEMENTED;
4903 }
4904
4905 /*
4906 * @unimplemented
4907 */
4908 NTSTATUS NTAPI
4909 MmSetBankedSection (ULONG Unknown0,
4910 ULONG Unknown1,
4911 ULONG Unknown2,
4912 ULONG Unknown3,
4913 ULONG Unknown4,
4914 ULONG Unknown5)
4915 {
4916 UNIMPLEMENTED;
4917 return (STATUS_NOT_IMPLEMENTED);
4918 }
4919
4920
4921 /**********************************************************************
4922 * NAME EXPORTED
4923 * MmCreateSection@
4924 *
4925 * DESCRIPTION
4926 * Creates a section object.
4927 *
4928 * ARGUMENTS
4929 * SectionObject (OUT)
4930 * Caller supplied storage for the resulting pointer
4931 * to a SECTION_OBJECT instance;
4932 *
4933 * DesiredAccess
4934 * Specifies the desired access to the section can be a
4935 * combination of:
4936 * STANDARD_RIGHTS_REQUIRED |
4937 * SECTION_QUERY |
4938 * SECTION_MAP_WRITE |
4939 * SECTION_MAP_READ |
4940 * SECTION_MAP_EXECUTE
4941 *
4942 * ObjectAttributes [OPTIONAL]
4943 * Initialized attributes for the object can be used
4944 * to create a named section;
4945 *
4946 * MaximumSize
4947 * Maximizes the size of the memory section. Must be
4948 * non-NULL for a page-file backed section.
4949 * If value specified for a mapped file and the file is
4950 * not large enough, file will be extended.
4951 *
4952 * SectionPageProtection
4953 * Can be a combination of:
4954 * PAGE_READONLY |
4955 * PAGE_READWRITE |
4956 * PAGE_WRITEONLY |
4957 * PAGE_WRITECOPY
4958 *
4959 * AllocationAttributes
4960 * Can be a combination of:
4961 * SEC_IMAGE |
4962 * SEC_RESERVE
4963 *
4964 * FileHandle
4965 * Handle to a file to create a section mapped to a file
4966 * instead of a memory backed section;
4967 *
4968 * File
4969 * Unknown.
4970 *
4971 * RETURN VALUE
4972 * Status.
4973 *
4974 * @implemented
4975 */
4976 NTSTATUS NTAPI
4977 MmCreateSection (OUT PVOID * Section,
4978 IN ACCESS_MASK DesiredAccess,
4979 IN POBJECT_ATTRIBUTES ObjectAttributes OPTIONAL,
4980 IN PLARGE_INTEGER MaximumSize,
4981 IN ULONG SectionPageProtection,
4982 IN ULONG AllocationAttributes,
4983 IN HANDLE FileHandle OPTIONAL,
4984 IN PFILE_OBJECT File OPTIONAL)
4985 {
4986 ULONG Protection;
4987 PROS_SECTION_OBJECT *SectionObject = (PROS_SECTION_OBJECT *)Section;
4988
4989 /*
4990 * Check the protection
4991 */
4992 Protection = SectionPageProtection & ~(PAGE_GUARD|PAGE_NOCACHE);
4993 if (Protection != PAGE_READONLY &&
4994 Protection != PAGE_READWRITE &&
4995 Protection != PAGE_WRITECOPY &&
4996 Protection != PAGE_EXECUTE &&
4997 Protection != PAGE_EXECUTE_READ &&
4998 Protection != PAGE_EXECUTE_READWRITE &&
4999 Protection != PAGE_EXECUTE_WRITECOPY)
5000 {
5001 return STATUS_INVALID_PAGE_PROTECTION;
5002 }
5003
5004 if (AllocationAttributes & SEC_IMAGE)
5005 {
5006 return(MmCreateImageSection(SectionObject,
5007 DesiredAccess,
5008 ObjectAttributes,
5009 MaximumSize,
5010 SectionPageProtection,
5011 AllocationAttributes,
5012 FileHandle));
5013 }
5014
5015 if (FileHandle != NULL)
5016 {
5017 return(MmCreateDataFileSection(SectionObject,
5018 DesiredAccess,
5019 ObjectAttributes,
5020 MaximumSize,
5021 SectionPageProtection,
5022 AllocationAttributes,
5023 FileHandle));
5024 }
5025
5026 return(MmCreatePageFileSection(SectionObject,
5027 DesiredAccess,
5028 ObjectAttributes,
5029 MaximumSize,
5030 SectionPageProtection,
5031 AllocationAttributes));
5032 }
5033
5034 NTSTATUS
5035 NTAPI
5036 NtAllocateUserPhysicalPages(IN HANDLE ProcessHandle,
5037 IN OUT PULONG_PTR NumberOfPages,
5038 IN OUT PULONG_PTR UserPfnArray)
5039 {
5040 UNIMPLEMENTED;
5041 return STATUS_NOT_IMPLEMENTED;
5042 }
5043
5044 NTSTATUS
5045 NTAPI
5046 NtMapUserPhysicalPages(IN PVOID VirtualAddresses,
5047 IN ULONG_PTR NumberOfPages,
5048 IN OUT PULONG_PTR UserPfnArray)
5049 {
5050 UNIMPLEMENTED;
5051 return STATUS_NOT_IMPLEMENTED;
5052 }
5053
5054 NTSTATUS
5055 NTAPI
5056 NtMapUserPhysicalPagesScatter(IN PVOID *VirtualAddresses,
5057 IN ULONG_PTR NumberOfPages,
5058 IN OUT PULONG_PTR UserPfnArray)
5059 {
5060 UNIMPLEMENTED;
5061 return STATUS_NOT_IMPLEMENTED;
5062 }
5063
5064 NTSTATUS
5065 NTAPI
5066 NtFreeUserPhysicalPages(IN HANDLE ProcessHandle,
5067 IN OUT PULONG_PTR NumberOfPages,
5068 IN OUT PULONG_PTR UserPfnArray)
5069 {
5070 UNIMPLEMENTED;
5071 return STATUS_NOT_IMPLEMENTED;
5072 }
5073
5074 NTSTATUS
5075 NTAPI
5076 NtAreMappedFilesTheSame(IN PVOID File1MappedAsAnImage,
5077 IN PVOID File2MappedAsFile)
5078 {
5079 UNIMPLEMENTED;
5080 return STATUS_NOT_IMPLEMENTED;
5081 }
5082
5083
5084 /* EOF */
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