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[NTOSKRNL/MM]
[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 #ifdef NEWCC
49 #include "../cache/section/newmm.h"
50 #endif
51 #define NDEBUG
52 #include <debug.h>
53 #include <reactos/exeformat.h>
54
55 #if defined (ALLOC_PRAGMA)
56 #pragma alloc_text(INIT, MmCreatePhysicalMemorySection)
57 #pragma alloc_text(INIT, MmInitSectionImplementation)
58 #endif
59
60 NTSTATUS
61 NTAPI
62 MiMapViewInSystemSpace(IN PVOID Section,
63 IN PVOID Session,
64 OUT PVOID *MappedBase,
65 IN OUT PSIZE_T ViewSize);
66
67 NTSTATUS
68 NTAPI
69 MmCreateArm3Section(OUT PVOID *SectionObject,
70 IN ACCESS_MASK DesiredAccess,
71 IN POBJECT_ATTRIBUTES ObjectAttributes OPTIONAL,
72 IN PLARGE_INTEGER InputMaximumSize,
73 IN ULONG SectionPageProtection,
74 IN ULONG AllocationAttributes,
75 IN HANDLE FileHandle OPTIONAL,
76 IN PFILE_OBJECT FileObject OPTIONAL);
77
78 NTSTATUS
79 NTAPI
80 MmMapViewOfArm3Section(IN PVOID SectionObject,
81 IN PEPROCESS Process,
82 IN OUT PVOID *BaseAddress,
83 IN ULONG_PTR ZeroBits,
84 IN SIZE_T CommitSize,
85 IN OUT PLARGE_INTEGER SectionOffset OPTIONAL,
86 IN OUT PSIZE_T ViewSize,
87 IN SECTION_INHERIT InheritDisposition,
88 IN ULONG AllocationType,
89 IN ULONG Protect);
90
91 //
92 // PeFmtCreateSection depends on the following:
93 //
94 C_ASSERT(EXEFMT_LOAD_HEADER_SIZE >= sizeof(IMAGE_DOS_HEADER));
95 C_ASSERT(sizeof(IMAGE_NT_HEADERS32) <= sizeof(IMAGE_NT_HEADERS64));
96
97 C_ASSERT(TYPE_ALIGNMENT(IMAGE_NT_HEADERS32) == TYPE_ALIGNMENT(IMAGE_NT_HEADERS64));
98 C_ASSERT(RTL_SIZEOF_THROUGH_FIELD(IMAGE_NT_HEADERS32, FileHeader) == RTL_SIZEOF_THROUGH_FIELD(IMAGE_NT_HEADERS64, FileHeader));
99 C_ASSERT(FIELD_OFFSET(IMAGE_NT_HEADERS32, OptionalHeader) == FIELD_OFFSET(IMAGE_NT_HEADERS64, OptionalHeader));
100
101 C_ASSERT(PEFMT_FIELDS_EQUAL(IMAGE_OPTIONAL_HEADER32, IMAGE_OPTIONAL_HEADER64, Magic));
102 C_ASSERT(PEFMT_FIELDS_EQUAL(IMAGE_OPTIONAL_HEADER32, IMAGE_OPTIONAL_HEADER64, SectionAlignment));
103 C_ASSERT(PEFMT_FIELDS_EQUAL(IMAGE_OPTIONAL_HEADER32, IMAGE_OPTIONAL_HEADER64, FileAlignment));
104 C_ASSERT(PEFMT_FIELDS_EQUAL(IMAGE_OPTIONAL_HEADER32, IMAGE_OPTIONAL_HEADER64, Subsystem));
105 C_ASSERT(PEFMT_FIELDS_EQUAL(IMAGE_OPTIONAL_HEADER32, IMAGE_OPTIONAL_HEADER64, MinorSubsystemVersion));
106 C_ASSERT(PEFMT_FIELDS_EQUAL(IMAGE_OPTIONAL_HEADER32, IMAGE_OPTIONAL_HEADER64, MajorSubsystemVersion));
107 C_ASSERT(PEFMT_FIELDS_EQUAL(IMAGE_OPTIONAL_HEADER32, IMAGE_OPTIONAL_HEADER64, AddressOfEntryPoint));
108 C_ASSERT(PEFMT_FIELDS_EQUAL(IMAGE_OPTIONAL_HEADER32, IMAGE_OPTIONAL_HEADER64, SizeOfCode));
109 C_ASSERT(PEFMT_FIELDS_EQUAL(IMAGE_OPTIONAL_HEADER32, IMAGE_OPTIONAL_HEADER64, SizeOfHeaders));
110
111 /* TYPES *********************************************************************/
112
113 typedef struct
114 {
115 PROS_SECTION_OBJECT Section;
116 PMM_SECTION_SEGMENT Segment;
117 ULONG Offset;
118 BOOLEAN WasDirty;
119 BOOLEAN Private;
120 }
121 MM_SECTION_PAGEOUT_CONTEXT;
122
123 /* GLOBALS *******************************************************************/
124
125 POBJECT_TYPE MmSectionObjectType = NULL;
126
127 ULONG_PTR MmSubsectionBase;
128
129 static ULONG SectionCharacteristicsToProtect[16] =
130 {
131 PAGE_NOACCESS, /* 0 = NONE */
132 PAGE_NOACCESS, /* 1 = SHARED */
133 PAGE_EXECUTE, /* 2 = EXECUTABLE */
134 PAGE_EXECUTE, /* 3 = EXECUTABLE, SHARED */
135 PAGE_READONLY, /* 4 = READABLE */
136 PAGE_READONLY, /* 5 = READABLE, SHARED */
137 PAGE_EXECUTE_READ, /* 6 = READABLE, EXECUTABLE */
138 PAGE_EXECUTE_READ, /* 7 = READABLE, EXECUTABLE, SHARED */
139 /*
140 * FIXME? do we really need the WriteCopy field in segments? can't we use
141 * PAGE_WRITECOPY here?
142 */
143 PAGE_READWRITE, /* 8 = WRITABLE */
144 PAGE_READWRITE, /* 9 = WRITABLE, SHARED */
145 PAGE_EXECUTE_READWRITE, /* 10 = WRITABLE, EXECUTABLE */
146 PAGE_EXECUTE_READWRITE, /* 11 = WRITABLE, EXECUTABLE, SHARED */
147 PAGE_READWRITE, /* 12 = WRITABLE, READABLE */
148 PAGE_READWRITE, /* 13 = WRITABLE, READABLE, SHARED */
149 PAGE_EXECUTE_READWRITE, /* 14 = WRITABLE, READABLE, EXECUTABLE */
150 PAGE_EXECUTE_READWRITE, /* 15 = WRITABLE, READABLE, EXECUTABLE, SHARED */
151 };
152
153 static GENERIC_MAPPING MmpSectionMapping = {
154 STANDARD_RIGHTS_READ | SECTION_MAP_READ | SECTION_QUERY,
155 STANDARD_RIGHTS_WRITE | SECTION_MAP_WRITE,
156 STANDARD_RIGHTS_EXECUTE | SECTION_MAP_EXECUTE,
157 SECTION_ALL_ACCESS};
158
159 #define PAGE_FROM_SSE(E) ((E) & 0xFFFFF000)
160 #define PFN_FROM_SSE(E) ((E) >> PAGE_SHIFT)
161 #define SHARE_COUNT_FROM_SSE(E) (((E) & 0x00000FFE) >> 1)
162 #define IS_SWAP_FROM_SSE(E) ((E) & 0x00000001)
163 #define MAX_SHARE_COUNT 0x7FF
164 #define MAKE_SSE(P, C) ((ULONG)(P) | ((C) << 1))
165 #define SWAPENTRY_FROM_SSE(E) ((E) >> 1)
166 #define MAKE_SWAP_SSE(S) (((ULONG)(S) << 1) | 0x1)
167
168 static const INFORMATION_CLASS_INFO ExSectionInfoClass[] =
169 {
170 ICI_SQ_SAME( sizeof(SECTION_BASIC_INFORMATION), sizeof(ULONG), ICIF_QUERY ), /* SectionBasicInformation */
171 ICI_SQ_SAME( sizeof(SECTION_IMAGE_INFORMATION), sizeof(ULONG), ICIF_QUERY ), /* SectionImageInformation */
172 };
173
174 /* FUNCTIONS *****************************************************************/
175
176
177 /*
178 References:
179 [1] Microsoft Corporation, "Microsoft Portable Executable and Common Object
180 File Format Specification", revision 6.0 (February 1999)
181 */
182 NTSTATUS NTAPI PeFmtCreateSection(IN CONST VOID * FileHeader,
183 IN SIZE_T FileHeaderSize,
184 IN PVOID File,
185 OUT PMM_IMAGE_SECTION_OBJECT ImageSectionObject,
186 OUT PULONG Flags,
187 IN PEXEFMT_CB_READ_FILE ReadFileCb,
188 IN PEXEFMT_CB_ALLOCATE_SEGMENTS AllocateSegmentsCb)
189 {
190 NTSTATUS nStatus;
191 ULONG cbFileHeaderOffsetSize = 0;
192 ULONG cbSectionHeadersOffset = 0;
193 ULONG cbSectionHeadersSize;
194 ULONG cbSectionHeadersOffsetSize = 0;
195 ULONG cbOptHeaderSize;
196 ULONG cbHeadersSize = 0;
197 ULONG nSectionAlignment;
198 ULONG nFileAlignment;
199 const IMAGE_DOS_HEADER * pidhDosHeader;
200 const IMAGE_NT_HEADERS32 * pinhNtHeader;
201 const IMAGE_OPTIONAL_HEADER32 * piohOptHeader;
202 const IMAGE_SECTION_HEADER * pishSectionHeaders;
203 PMM_SECTION_SEGMENT pssSegments;
204 LARGE_INTEGER lnOffset;
205 PVOID pBuffer;
206 SIZE_T nPrevVirtualEndOfSegment = 0;
207 ULONG nFileSizeOfHeaders = 0;
208 ULONG i;
209
210 ASSERT(FileHeader);
211 ASSERT(FileHeaderSize > 0);
212 ASSERT(File);
213 ASSERT(ImageSectionObject);
214 ASSERT(ReadFileCb);
215 ASSERT(AllocateSegmentsCb);
216
217 ASSERT(Intsafe_CanOffsetPointer(FileHeader, FileHeaderSize));
218
219 ASSERT(((UINT_PTR)FileHeader % TYPE_ALIGNMENT(IMAGE_DOS_HEADER)) == 0);
220
221 #define DIE(ARGS_) { DPRINT ARGS_; goto l_Return; }
222
223 pBuffer = NULL;
224 pidhDosHeader = FileHeader;
225
226 /* DOS HEADER */
227 nStatus = STATUS_ROS_EXEFMT_UNKNOWN_FORMAT;
228
229 /* image too small to be an MZ executable */
230 if(FileHeaderSize < sizeof(IMAGE_DOS_HEADER))
231 DIE(("Too small to be an MZ executable, size is %lu\n", FileHeaderSize));
232
233 /* no MZ signature */
234 if(pidhDosHeader->e_magic != IMAGE_DOS_SIGNATURE)
235 DIE(("No MZ signature found, e_magic is %hX\n", pidhDosHeader->e_magic));
236
237 /* not a Windows executable */
238 if(pidhDosHeader->e_lfanew <= 0)
239 DIE(("Not a Windows executable, e_lfanew is %d\n", pidhDosHeader->e_lfanew));
240
241 /* NT HEADER */
242 nStatus = STATUS_INVALID_IMAGE_FORMAT;
243
244 if(!Intsafe_AddULong32(&cbFileHeaderOffsetSize, pidhDosHeader->e_lfanew, RTL_SIZEOF_THROUGH_FIELD(IMAGE_NT_HEADERS32, FileHeader)))
245 DIE(("The DOS stub is too large, e_lfanew is %X\n", pidhDosHeader->e_lfanew));
246
247 if(FileHeaderSize < cbFileHeaderOffsetSize)
248 pinhNtHeader = NULL;
249 else
250 {
251 /*
252 * we already know that Intsafe_CanOffsetPointer(FileHeader, FileHeaderSize),
253 * and FileHeaderSize >= cbFileHeaderOffsetSize, so this holds true too
254 */
255 ASSERT(Intsafe_CanOffsetPointer(FileHeader, pidhDosHeader->e_lfanew));
256 pinhNtHeader = (PVOID)((UINT_PTR)FileHeader + pidhDosHeader->e_lfanew);
257 }
258
259 /*
260 * the buffer doesn't contain the NT file header, or the alignment is wrong: we
261 * need to read the header from the file
262 */
263 if(FileHeaderSize < cbFileHeaderOffsetSize ||
264 (UINT_PTR)pinhNtHeader % TYPE_ALIGNMENT(IMAGE_NT_HEADERS32) != 0)
265 {
266 ULONG cbNtHeaderSize;
267 ULONG cbReadSize;
268 PVOID pData;
269
270 l_ReadHeaderFromFile:
271 cbNtHeaderSize = 0;
272 lnOffset.QuadPart = pidhDosHeader->e_lfanew;
273
274 /* read the header from the file */
275 nStatus = ReadFileCb(File, &lnOffset, sizeof(IMAGE_NT_HEADERS64), &pData, &pBuffer, &cbReadSize);
276
277 if(!NT_SUCCESS(nStatus))
278 DIE(("ReadFile failed, status %08X\n", nStatus));
279
280 ASSERT(pData);
281 ASSERT(pBuffer);
282 ASSERT(cbReadSize > 0);
283
284 nStatus = STATUS_INVALID_IMAGE_FORMAT;
285
286 /* the buffer doesn't contain the file header */
287 if(cbReadSize < RTL_SIZEOF_THROUGH_FIELD(IMAGE_NT_HEADERS32, FileHeader))
288 DIE(("The file doesn't contain the PE file header\n"));
289
290 pinhNtHeader = pData;
291
292 /* object still not aligned: copy it to the beginning of the buffer */
293 if((UINT_PTR)pinhNtHeader % TYPE_ALIGNMENT(IMAGE_NT_HEADERS32) != 0)
294 {
295 ASSERT((UINT_PTR)pBuffer % TYPE_ALIGNMENT(IMAGE_NT_HEADERS32) == 0);
296 RtlMoveMemory(pBuffer, pData, cbReadSize);
297 pinhNtHeader = pBuffer;
298 }
299
300 /* invalid NT header */
301 nStatus = STATUS_INVALID_IMAGE_PROTECT;
302
303 if(pinhNtHeader->Signature != IMAGE_NT_SIGNATURE)
304 DIE(("The file isn't a PE executable, Signature is %X\n", pinhNtHeader->Signature));
305
306 nStatus = STATUS_INVALID_IMAGE_FORMAT;
307
308 if(!Intsafe_AddULong32(&cbNtHeaderSize, pinhNtHeader->FileHeader.SizeOfOptionalHeader, FIELD_OFFSET(IMAGE_NT_HEADERS32, OptionalHeader)))
309 DIE(("The full NT header is too large\n"));
310
311 /* the buffer doesn't contain the whole NT header */
312 if(cbReadSize < cbNtHeaderSize)
313 DIE(("The file doesn't contain the full NT header\n"));
314 }
315 else
316 {
317 ULONG cbOptHeaderOffsetSize = 0;
318
319 nStatus = STATUS_INVALID_IMAGE_FORMAT;
320
321 /* don't trust an invalid NT header */
322 if(pinhNtHeader->Signature != IMAGE_NT_SIGNATURE)
323 DIE(("The file isn't a PE executable, Signature is %X\n", pinhNtHeader->Signature));
324
325 if(!Intsafe_AddULong32(&cbOptHeaderOffsetSize, pidhDosHeader->e_lfanew, FIELD_OFFSET(IMAGE_NT_HEADERS32, OptionalHeader)))
326 DIE(("The DOS stub is too large, e_lfanew is %X\n", pidhDosHeader->e_lfanew));
327
328 if(!Intsafe_AddULong32(&cbOptHeaderOffsetSize, cbOptHeaderOffsetSize, pinhNtHeader->FileHeader.SizeOfOptionalHeader))
329 DIE(("The NT header is too large, SizeOfOptionalHeader is %X\n", pinhNtHeader->FileHeader.SizeOfOptionalHeader));
330
331 /* the buffer doesn't contain the whole NT header: read it from the file */
332 if(cbOptHeaderOffsetSize > FileHeaderSize)
333 goto l_ReadHeaderFromFile;
334 }
335
336 /* read information from the NT header */
337 piohOptHeader = &pinhNtHeader->OptionalHeader;
338 cbOptHeaderSize = pinhNtHeader->FileHeader.SizeOfOptionalHeader;
339
340 nStatus = STATUS_INVALID_IMAGE_FORMAT;
341
342 if(!RTL_CONTAINS_FIELD(piohOptHeader, cbOptHeaderSize, Magic))
343 DIE(("The optional header doesn't contain the Magic field, SizeOfOptionalHeader is %X\n", cbOptHeaderSize));
344
345 /* ASSUME: RtlZeroMemory(ImageSectionObject, sizeof(*ImageSectionObject)); */
346
347 switch(piohOptHeader->Magic)
348 {
349 case IMAGE_NT_OPTIONAL_HDR32_MAGIC:
350 case IMAGE_NT_OPTIONAL_HDR64_MAGIC:
351 break;
352
353 default:
354 DIE(("Unrecognized optional header, Magic is %X\n", piohOptHeader->Magic));
355 }
356
357 if (RTL_CONTAINS_FIELD(piohOptHeader, cbOptHeaderSize, SectionAlignment) &&
358 RTL_CONTAINS_FIELD(piohOptHeader, cbOptHeaderSize, FileAlignment))
359 {
360 /* See [1], section 3.4.2 */
361 if(piohOptHeader->SectionAlignment < PAGE_SIZE)
362 {
363 if(piohOptHeader->FileAlignment != piohOptHeader->SectionAlignment)
364 DIE(("Sections aren't page-aligned and the file alignment isn't the same\n"));
365 }
366 else if(piohOptHeader->SectionAlignment < piohOptHeader->FileAlignment)
367 DIE(("The section alignment is smaller than the file alignment\n"));
368
369 nSectionAlignment = piohOptHeader->SectionAlignment;
370 nFileAlignment = piohOptHeader->FileAlignment;
371
372 if(!IsPowerOf2(nSectionAlignment) || !IsPowerOf2(nFileAlignment))
373 DIE(("The section alignment (%u) and file alignment (%u) aren't both powers of 2\n", nSectionAlignment, nFileAlignment));
374 }
375 else
376 {
377 nSectionAlignment = PAGE_SIZE;
378 nFileAlignment = PAGE_SIZE;
379 }
380
381 ASSERT(IsPowerOf2(nSectionAlignment));
382 ASSERT(IsPowerOf2(nFileAlignment));
383
384 switch(piohOptHeader->Magic)
385 {
386 /* PE32 */
387 case IMAGE_NT_OPTIONAL_HDR32_MAGIC:
388 {
389 if(RTL_CONTAINS_FIELD(piohOptHeader, cbOptHeaderSize, ImageBase))
390 ImageSectionObject->ImageBase = piohOptHeader->ImageBase;
391
392 if(RTL_CONTAINS_FIELD(piohOptHeader, cbOptHeaderSize, SizeOfImage))
393 ImageSectionObject->ImageSize = piohOptHeader->SizeOfImage;
394
395 if(RTL_CONTAINS_FIELD(piohOptHeader, cbOptHeaderSize, SizeOfStackReserve))
396 ImageSectionObject->StackReserve = piohOptHeader->SizeOfStackReserve;
397
398 if(RTL_CONTAINS_FIELD(piohOptHeader, cbOptHeaderSize, SizeOfStackCommit))
399 ImageSectionObject->StackCommit = piohOptHeader->SizeOfStackCommit;
400
401 break;
402 }
403
404 /* PE32+ */
405 case IMAGE_NT_OPTIONAL_HDR64_MAGIC:
406 {
407 const IMAGE_OPTIONAL_HEADER64 * pioh64OptHeader;
408
409 pioh64OptHeader = (const IMAGE_OPTIONAL_HEADER64 *)piohOptHeader;
410
411 if(RTL_CONTAINS_FIELD(pioh64OptHeader, cbOptHeaderSize, ImageBase))
412 {
413 if(pioh64OptHeader->ImageBase > MAXULONG_PTR)
414 DIE(("ImageBase exceeds the address space\n"));
415
416 ImageSectionObject->ImageBase = (ULONG_PTR)pioh64OptHeader->ImageBase;
417 }
418
419 if(RTL_CONTAINS_FIELD(pioh64OptHeader, cbOptHeaderSize, SizeOfImage))
420 {
421 if(pioh64OptHeader->SizeOfImage > MAXULONG_PTR)
422 DIE(("SizeOfImage exceeds the address space\n"));
423
424 ImageSectionObject->ImageSize = pioh64OptHeader->SizeOfImage;
425 }
426
427 if(RTL_CONTAINS_FIELD(pioh64OptHeader, cbOptHeaderSize, SizeOfStackReserve))
428 {
429 if(pioh64OptHeader->SizeOfStackReserve > MAXULONG_PTR)
430 DIE(("SizeOfStackReserve exceeds the address space\n"));
431
432 ImageSectionObject->StackReserve = (ULONG_PTR)pioh64OptHeader->SizeOfStackReserve;
433 }
434
435 if(RTL_CONTAINS_FIELD(pioh64OptHeader, cbOptHeaderSize, SizeOfStackCommit))
436 {
437 if(pioh64OptHeader->SizeOfStackCommit > MAXULONG_PTR)
438 DIE(("SizeOfStackCommit exceeds the address space\n"));
439
440 ImageSectionObject->StackCommit = (ULONG_PTR)pioh64OptHeader->SizeOfStackCommit;
441 }
442
443 break;
444 }
445 }
446
447 /* [1], section 3.4.2 */
448 if((ULONG_PTR)ImageSectionObject->ImageBase % 0x10000)
449 DIE(("ImageBase is not aligned on a 64KB boundary"));
450
451 if(RTL_CONTAINS_FIELD(piohOptHeader, cbOptHeaderSize, Subsystem))
452 {
453 ImageSectionObject->Subsystem = piohOptHeader->Subsystem;
454
455 if(RTL_CONTAINS_FIELD(piohOptHeader, cbOptHeaderSize, MinorSubsystemVersion) &&
456 RTL_CONTAINS_FIELD(piohOptHeader, cbOptHeaderSize, MajorSubsystemVersion))
457 {
458 ImageSectionObject->MinorSubsystemVersion = piohOptHeader->MinorSubsystemVersion;
459 ImageSectionObject->MajorSubsystemVersion = piohOptHeader->MajorSubsystemVersion;
460 }
461 }
462
463 if(RTL_CONTAINS_FIELD(piohOptHeader, cbOptHeaderSize, AddressOfEntryPoint))
464 {
465 ImageSectionObject->EntryPoint = piohOptHeader->ImageBase +
466 piohOptHeader->AddressOfEntryPoint;
467 }
468
469 if(RTL_CONTAINS_FIELD(piohOptHeader, cbOptHeaderSize, SizeOfCode))
470 ImageSectionObject->Executable = piohOptHeader->SizeOfCode != 0;
471 else
472 ImageSectionObject->Executable = TRUE;
473
474 ImageSectionObject->ImageCharacteristics = pinhNtHeader->FileHeader.Characteristics;
475 ImageSectionObject->Machine = pinhNtHeader->FileHeader.Machine;
476
477 /* SECTION HEADERS */
478 nStatus = STATUS_INVALID_IMAGE_FORMAT;
479
480 /* see [1], section 3.3 */
481 if(pinhNtHeader->FileHeader.NumberOfSections > 96)
482 DIE(("Too many sections, NumberOfSections is %u\n", pinhNtHeader->FileHeader.NumberOfSections));
483
484 /*
485 * the additional segment is for the file's headers. They need to be present for
486 * the benefit of the dynamic loader (to locate exports, defaults for thread
487 * parameters, resources, etc.)
488 */
489 ImageSectionObject->NrSegments = pinhNtHeader->FileHeader.NumberOfSections + 1;
490
491 /* file offset for the section headers */
492 if(!Intsafe_AddULong32(&cbSectionHeadersOffset, pidhDosHeader->e_lfanew, FIELD_OFFSET(IMAGE_NT_HEADERS32, OptionalHeader)))
493 DIE(("Offset overflow\n"));
494
495 if(!Intsafe_AddULong32(&cbSectionHeadersOffset, cbSectionHeadersOffset, pinhNtHeader->FileHeader.SizeOfOptionalHeader))
496 DIE(("Offset overflow\n"));
497
498 /* size of the section headers */
499 ASSERT(Intsafe_CanMulULong32(pinhNtHeader->FileHeader.NumberOfSections, sizeof(IMAGE_SECTION_HEADER)));
500 cbSectionHeadersSize = pinhNtHeader->FileHeader.NumberOfSections * sizeof(IMAGE_SECTION_HEADER);
501
502 if(!Intsafe_AddULong32(&cbSectionHeadersOffsetSize, cbSectionHeadersOffset, cbSectionHeadersSize))
503 DIE(("Section headers too large\n"));
504
505 /* size of the executable's headers */
506 if(RTL_CONTAINS_FIELD(piohOptHeader, cbOptHeaderSize, SizeOfHeaders))
507 {
508 // if(!IsAligned(piohOptHeader->SizeOfHeaders, nFileAlignment))
509 // DIE(("SizeOfHeaders is not aligned\n"));
510
511 if(cbSectionHeadersSize > piohOptHeader->SizeOfHeaders)
512 DIE(("The section headers overflow SizeOfHeaders\n"));
513
514 cbHeadersSize = piohOptHeader->SizeOfHeaders;
515 }
516 else if(!AlignUp(&cbHeadersSize, cbSectionHeadersOffsetSize, nFileAlignment))
517 DIE(("Overflow aligning the size of headers\n"));
518
519 if(pBuffer)
520 {
521 ExFreePool(pBuffer);
522 pBuffer = NULL;
523 }
524 /* WARNING: pinhNtHeader IS NO LONGER USABLE */
525 /* WARNING: piohOptHeader IS NO LONGER USABLE */
526 /* WARNING: pioh64OptHeader IS NO LONGER USABLE */
527
528 if(FileHeaderSize < cbSectionHeadersOffsetSize)
529 pishSectionHeaders = NULL;
530 else
531 {
532 /*
533 * we already know that Intsafe_CanOffsetPointer(FileHeader, FileHeaderSize),
534 * and FileHeaderSize >= cbSectionHeadersOffsetSize, so this holds true too
535 */
536 ASSERT(Intsafe_CanOffsetPointer(FileHeader, cbSectionHeadersOffset));
537 pishSectionHeaders = (PVOID)((UINT_PTR)FileHeader + cbSectionHeadersOffset);
538 }
539
540 /*
541 * the buffer doesn't contain the section headers, or the alignment is wrong:
542 * read the headers from the file
543 */
544 if(FileHeaderSize < cbSectionHeadersOffsetSize ||
545 (UINT_PTR)pishSectionHeaders % TYPE_ALIGNMENT(IMAGE_SECTION_HEADER) != 0)
546 {
547 PVOID pData;
548 ULONG cbReadSize;
549
550 lnOffset.QuadPart = cbSectionHeadersOffset;
551
552 /* read the header from the file */
553 nStatus = ReadFileCb(File, &lnOffset, cbSectionHeadersSize, &pData, &pBuffer, &cbReadSize);
554
555 if(!NT_SUCCESS(nStatus))
556 DIE(("ReadFile failed with status %08X\n", nStatus));
557
558 ASSERT(pData);
559 ASSERT(pBuffer);
560 ASSERT(cbReadSize > 0);
561
562 nStatus = STATUS_INVALID_IMAGE_FORMAT;
563
564 /* the buffer doesn't contain all the section headers */
565 if(cbReadSize < cbSectionHeadersSize)
566 DIE(("The file doesn't contain all of the section headers\n"));
567
568 pishSectionHeaders = pData;
569
570 /* object still not aligned: copy it to the beginning of the buffer */
571 if((UINT_PTR)pishSectionHeaders % TYPE_ALIGNMENT(IMAGE_SECTION_HEADER) != 0)
572 {
573 ASSERT((UINT_PTR)pBuffer % TYPE_ALIGNMENT(IMAGE_SECTION_HEADER) == 0);
574 RtlMoveMemory(pBuffer, pData, cbReadSize);
575 pishSectionHeaders = pBuffer;
576 }
577 }
578
579 /* SEGMENTS */
580 /* allocate the segments */
581 nStatus = STATUS_INSUFFICIENT_RESOURCES;
582 ImageSectionObject->Segments = AllocateSegmentsCb(ImageSectionObject->NrSegments);
583
584 if(ImageSectionObject->Segments == NULL)
585 DIE(("AllocateSegments failed\n"));
586
587 /* initialize the headers segment */
588 pssSegments = ImageSectionObject->Segments;
589
590 // ASSERT(IsAligned(cbHeadersSize, nFileAlignment));
591
592 if(!AlignUp(&nFileSizeOfHeaders, cbHeadersSize, nFileAlignment))
593 DIE(("Cannot align the size of the section headers\n"));
594
595 nPrevVirtualEndOfSegment = ALIGN_UP_BY(cbHeadersSize, nSectionAlignment);
596 if (nPrevVirtualEndOfSegment < cbHeadersSize)
597 DIE(("Cannot align the size of the section headers\n"));
598
599 pssSegments[0].FileOffset = 0;
600 pssSegments[0].Protection = PAGE_READONLY;
601 pssSegments[0].Length = nPrevVirtualEndOfSegment;
602 pssSegments[0].RawLength = nFileSizeOfHeaders;
603 pssSegments[0].VirtualAddress = 0;
604 pssSegments[0].Characteristics = IMAGE_SCN_CNT_INITIALIZED_DATA;
605 pssSegments[0].WriteCopy = TRUE;
606
607 /* skip the headers segment */
608 ++ pssSegments;
609
610 nStatus = STATUS_INVALID_IMAGE_FORMAT;
611
612 /* convert the executable sections into segments. See also [1], section 4 */
613 for(i = 0; i < ImageSectionObject->NrSegments - 1; ++ i)
614 {
615 ULONG nCharacteristics;
616
617 /* validate the alignment */
618 if(!IsAligned(pishSectionHeaders[i].VirtualAddress, nSectionAlignment))
619 DIE(("VirtualAddress[%u] is not aligned\n", i));
620
621 /* sections must be contiguous, ordered by base address and non-overlapping */
622 if(pishSectionHeaders[i].VirtualAddress != nPrevVirtualEndOfSegment)
623 DIE(("Memory gap between section %u and the previous\n", i));
624
625 /* ignore explicit BSS sections */
626 if(pishSectionHeaders[i].SizeOfRawData != 0)
627 {
628 /* validate the alignment */
629 #if 0
630 /* Yes, this should be a multiple of FileAlignment, but there's
631 * stuff out there that isn't. We can cope with that
632 */
633 if(!IsAligned(pishSectionHeaders[i].SizeOfRawData, nFileAlignment))
634 DIE(("SizeOfRawData[%u] is not aligned\n", i));
635 #endif
636
637 // if(!IsAligned(pishSectionHeaders[i].PointerToRawData, nFileAlignment))
638 // DIE(("PointerToRawData[%u] is not aligned\n", i));
639
640 /* conversion */
641 pssSegments[i].FileOffset = pishSectionHeaders[i].PointerToRawData;
642 pssSegments[i].RawLength = pishSectionHeaders[i].SizeOfRawData;
643 }
644 else
645 {
646 ASSERT(pssSegments[i].FileOffset == 0);
647 ASSERT(pssSegments[i].RawLength == 0);
648 }
649
650 ASSERT(Intsafe_CanAddLong64(pssSegments[i].FileOffset, pssSegments[i].RawLength));
651
652 nCharacteristics = pishSectionHeaders[i].Characteristics;
653
654 /* no explicit protection */
655 if((nCharacteristics & (IMAGE_SCN_MEM_EXECUTE | IMAGE_SCN_MEM_READ | IMAGE_SCN_MEM_WRITE)) == 0)
656 {
657 if(nCharacteristics & IMAGE_SCN_CNT_CODE)
658 nCharacteristics |= IMAGE_SCN_MEM_EXECUTE | IMAGE_SCN_MEM_READ;
659
660 if(nCharacteristics & IMAGE_SCN_CNT_INITIALIZED_DATA)
661 nCharacteristics |= IMAGE_SCN_MEM_READ | IMAGE_SCN_MEM_WRITE;
662
663 if(nCharacteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA)
664 nCharacteristics |= IMAGE_SCN_MEM_READ | IMAGE_SCN_MEM_WRITE;
665 }
666
667 /* see table above */
668 pssSegments[i].Protection = SectionCharacteristicsToProtect[nCharacteristics >> 28];
669 pssSegments[i].WriteCopy = !(nCharacteristics & IMAGE_SCN_MEM_SHARED);
670
671 if(pishSectionHeaders[i].Misc.VirtualSize == 0 || pishSectionHeaders[i].Misc.VirtualSize < pishSectionHeaders[i].SizeOfRawData)
672 pssSegments[i].Length = pishSectionHeaders[i].SizeOfRawData;
673 else
674 pssSegments[i].Length = pishSectionHeaders[i].Misc.VirtualSize;
675
676 pssSegments[i].Length = ALIGN_UP_BY(pssSegments[i].Length, nSectionAlignment);
677 if (pssSegments[i].Length < pssSegments[i].Length)
678 DIE(("Cannot align the virtual size of section %u\n", i));
679
680 if(pssSegments[i].Length == 0)
681 DIE(("Virtual size of section %u is null\n", i));
682
683 pssSegments[i].VirtualAddress = pishSectionHeaders[i].VirtualAddress;
684 pssSegments[i].Characteristics = pishSectionHeaders[i].Characteristics;
685
686 /* ensure the memory image is no larger than 4GB */
687 nPrevVirtualEndOfSegment = pssSegments[i].VirtualAddress + pssSegments[i].Length;
688 if (nPrevVirtualEndOfSegment < pssSegments[i].VirtualAddress)
689 DIE(("The image is too large\n"));
690 }
691
692 if(nSectionAlignment >= PAGE_SIZE)
693 *Flags |= EXEFMT_LOAD_ASSUME_SEGMENTS_PAGE_ALIGNED;
694
695 /* Success */
696 nStatus = STATUS_ROS_EXEFMT_LOADED_FORMAT | EXEFMT_LOADED_PE32;
697
698 l_Return:
699 if(pBuffer)
700 ExFreePool(pBuffer);
701
702 return nStatus;
703 }
704
705 /* Note: Mmsp prefix denotes "Memory Manager Section Private". */
706
707 /*
708 * FUNCTION: Waits in kernel mode up to ten seconds for an MM_PAGEOP event.
709 * ARGUMENTS: PMM_PAGEOP which event we should wait for.
710 * RETURNS: Status of the wait.
711 */
712 static NTSTATUS
713 MmspWaitForPageOpCompletionEvent(PMM_PAGEOP PageOp)
714 {
715 LARGE_INTEGER Timeout;
716 #ifdef __GNUC__ /* TODO: Use other macro to check for suffix to use? */
717
718 Timeout.QuadPart = -100000000LL; // 10 sec
719 #else
720
721 Timeout.QuadPart = -100000000; // 10 sec
722 #endif
723
724 return KeWaitForSingleObject(&PageOp->CompletionEvent, 0, KernelMode, FALSE, &Timeout);
725 }
726
727
728 /*
729 * FUNCTION: Sets the page op completion event and releases the page op.
730 * ARGUMENTS: PMM_PAGEOP.
731 * RETURNS: In shorter time than it takes you to even read this
732 * description, so don't even think about geting a mug of coffee.
733 */
734 static void
735 MmspCompleteAndReleasePageOp(PMM_PAGEOP PageOp)
736 {
737 KeSetEvent(&PageOp->CompletionEvent, IO_NO_INCREMENT, FALSE);
738 MmReleasePageOp(PageOp);
739 }
740
741
742 /*
743 * FUNCTION: Waits in kernel mode indefinitely for a file object lock.
744 * ARGUMENTS: PFILE_OBJECT to wait for.
745 * RETURNS: Status of the wait.
746 */
747 NTSTATUS
748 MmspWaitForFileLock(PFILE_OBJECT File)
749 {
750 return STATUS_SUCCESS;
751 //return KeWaitForSingleObject(&File->Lock, 0, KernelMode, FALSE, NULL);
752 }
753
754
755 VOID
756 MmFreePageTablesSectionSegment(PMM_SECTION_SEGMENT Segment)
757 {
758 ULONG i;
759 if (Segment->Length > NR_SECTION_PAGE_TABLES * PAGE_SIZE)
760 {
761 for (i = 0; i < NR_SECTION_PAGE_TABLES; i++)
762 {
763 if (Segment->PageDirectory.PageTables[i] != NULL)
764 {
765 ExFreePool(Segment->PageDirectory.PageTables[i]);
766 }
767 }
768 }
769 }
770
771 VOID
772 NTAPI
773 MmFreeSectionSegments(PFILE_OBJECT FileObject)
774 {
775 if (FileObject->SectionObjectPointer->ImageSectionObject != NULL)
776 {
777 PMM_IMAGE_SECTION_OBJECT ImageSectionObject;
778 PMM_SECTION_SEGMENT SectionSegments;
779 ULONG NrSegments;
780 ULONG i;
781
782 ImageSectionObject = (PMM_IMAGE_SECTION_OBJECT)FileObject->SectionObjectPointer->ImageSectionObject;
783 NrSegments = ImageSectionObject->NrSegments;
784 SectionSegments = ImageSectionObject->Segments;
785 for (i = 0; i < NrSegments; i++)
786 {
787 if (SectionSegments[i].ReferenceCount != 0)
788 {
789 DPRINT1("Image segment %d still referenced (was %d)\n", i,
790 SectionSegments[i].ReferenceCount);
791 KeBugCheck(MEMORY_MANAGEMENT);
792 }
793 MmFreePageTablesSectionSegment(&SectionSegments[i]);
794 }
795 ExFreePool(ImageSectionObject->Segments);
796 ExFreePool(ImageSectionObject);
797 FileObject->SectionObjectPointer->ImageSectionObject = NULL;
798 }
799 if (FileObject->SectionObjectPointer->DataSectionObject != NULL)
800 {
801 PMM_SECTION_SEGMENT Segment;
802
803 Segment = (PMM_SECTION_SEGMENT)FileObject->SectionObjectPointer->
804 DataSectionObject;
805
806 if (Segment->ReferenceCount != 0)
807 {
808 DPRINT1("Data segment still referenced\n");
809 KeBugCheck(MEMORY_MANAGEMENT);
810 }
811 MmFreePageTablesSectionSegment(Segment);
812 ExFreePool(Segment);
813 FileObject->SectionObjectPointer->DataSectionObject = NULL;
814 }
815 }
816
817 VOID
818 NTAPI
819 MmLockSectionSegment(PMM_SECTION_SEGMENT Segment)
820 {
821 ExAcquireFastMutex(&Segment->Lock);
822 }
823
824 VOID
825 NTAPI
826 MmUnlockSectionSegment(PMM_SECTION_SEGMENT Segment)
827 {
828 ExReleaseFastMutex(&Segment->Lock);
829 }
830
831 VOID
832 NTAPI
833 MmSetPageEntrySectionSegment(PMM_SECTION_SEGMENT Segment,
834 ULONG_PTR Offset,
835 ULONG_PTR Entry)
836 {
837 PSECTION_PAGE_TABLE Table;
838 ULONG_PTR DirectoryOffset;
839 ULONG_PTR TableOffset;
840
841 if (Segment->Length <= NR_SECTION_PAGE_TABLES * PAGE_SIZE)
842 {
843 Table = (PSECTION_PAGE_TABLE)&Segment->PageDirectory;
844 }
845 else
846 {
847 DirectoryOffset = PAGE_TO_SECTION_PAGE_DIRECTORY_OFFSET(Offset);
848 Table = Segment->PageDirectory.PageTables[DirectoryOffset];
849 if (Table == NULL)
850 {
851 Table =
852 Segment->PageDirectory.PageTables[DirectoryOffset] =
853 ExAllocatePoolWithTag(NonPagedPool, sizeof(SECTION_PAGE_TABLE),
854 TAG_SECTION_PAGE_TABLE);
855 if (Table == NULL)
856 {
857 KeBugCheck(MEMORY_MANAGEMENT);
858 }
859 memset(Table, 0, sizeof(SECTION_PAGE_TABLE));
860 DPRINT("Table %x\n", Table);
861 }
862 }
863 TableOffset = PAGE_TO_SECTION_PAGE_TABLE_OFFSET(Offset);
864 Table->Entry[TableOffset] = (ULONG)Entry;
865 }
866
867
868 ULONG
869 NTAPI
870 MmGetPageEntrySectionSegment(PMM_SECTION_SEGMENT Segment,
871 ULONG_PTR Offset)
872 {
873 PSECTION_PAGE_TABLE Table;
874 ULONG Entry;
875 ULONG_PTR DirectoryOffset;
876 ULONG_PTR TableOffset;
877
878 DPRINT("MmGetPageEntrySection(Segment %x, Offset %x)\n", Segment, Offset);
879
880 if (Segment->Length <= NR_SECTION_PAGE_TABLES * PAGE_SIZE)
881 {
882 Table = (PSECTION_PAGE_TABLE)&Segment->PageDirectory;
883 }
884 else
885 {
886 DirectoryOffset = PAGE_TO_SECTION_PAGE_DIRECTORY_OFFSET(Offset);
887 Table = Segment->PageDirectory.PageTables[DirectoryOffset];
888 DPRINT("Table %x\n", Table);
889 if (Table == NULL)
890 {
891 return(0);
892 }
893 }
894 TableOffset = PAGE_TO_SECTION_PAGE_TABLE_OFFSET(Offset);
895 Entry = Table->Entry[TableOffset];
896 return(Entry);
897 }
898
899 VOID
900 NTAPI
901 MmSharePageEntrySectionSegment(PMM_SECTION_SEGMENT Segment,
902 ULONG_PTR Offset)
903 {
904 ULONG Entry;
905
906 Entry = MmGetPageEntrySectionSegment(Segment, Offset);
907 if (Entry == 0)
908 {
909 DPRINT1("Entry == 0 for MmSharePageEntrySectionSegment\n");
910 KeBugCheck(MEMORY_MANAGEMENT);
911 }
912 if (SHARE_COUNT_FROM_SSE(Entry) == MAX_SHARE_COUNT)
913 {
914 DPRINT1("Maximum share count reached\n");
915 KeBugCheck(MEMORY_MANAGEMENT);
916 }
917 if (IS_SWAP_FROM_SSE(Entry))
918 {
919 KeBugCheck(MEMORY_MANAGEMENT);
920 }
921 Entry = MAKE_SSE(PAGE_FROM_SSE(Entry), SHARE_COUNT_FROM_SSE(Entry) + 1);
922 MmSetPageEntrySectionSegment(Segment, Offset, Entry);
923 }
924
925 BOOLEAN
926 NTAPI
927 MmUnsharePageEntrySectionSegment(PROS_SECTION_OBJECT Section,
928 PMM_SECTION_SEGMENT Segment,
929 ULONG Offset,
930 BOOLEAN Dirty,
931 BOOLEAN PageOut)
932 {
933 ULONG Entry;
934 BOOLEAN IsDirectMapped = FALSE;
935
936 Entry = MmGetPageEntrySectionSegment(Segment, Offset);
937 if (Entry == 0)
938 {
939 DPRINT1("Entry == 0 for MmUnsharePageEntrySectionSegment\n");
940 KeBugCheck(MEMORY_MANAGEMENT);
941 }
942 if (SHARE_COUNT_FROM_SSE(Entry) == 0)
943 {
944 DPRINT1("Zero share count for unshare\n");
945 KeBugCheck(MEMORY_MANAGEMENT);
946 }
947 if (IS_SWAP_FROM_SSE(Entry))
948 {
949 KeBugCheck(MEMORY_MANAGEMENT);
950 }
951 Entry = MAKE_SSE(PAGE_FROM_SSE(Entry), SHARE_COUNT_FROM_SSE(Entry) - 1);
952 /*
953 * If we reducing the share count of this entry to zero then set the entry
954 * to zero and tell the cache the page is no longer mapped.
955 */
956 if (SHARE_COUNT_FROM_SSE(Entry) == 0)
957 {
958 PFILE_OBJECT FileObject;
959 PBCB Bcb;
960 SWAPENTRY SavedSwapEntry;
961 PFN_NUMBER Page;
962 BOOLEAN IsImageSection;
963 ULONG FileOffset;
964
965 FileOffset = Offset + Segment->FileOffset;
966
967 IsImageSection = Section->AllocationAttributes & SEC_IMAGE ? TRUE : FALSE;
968
969 Page = PFN_FROM_SSE(Entry);
970 FileObject = Section->FileObject;
971 if (FileObject != NULL &&
972 !(Segment->Characteristics & IMAGE_SCN_MEM_SHARED))
973 {
974
975 if ((FileOffset % PAGE_SIZE) == 0 &&
976 (Offset + PAGE_SIZE <= Segment->RawLength || !IsImageSection))
977 {
978 NTSTATUS Status;
979 Bcb = FileObject->SectionObjectPointer->SharedCacheMap;
980 IsDirectMapped = TRUE;
981 #ifndef NEWCC
982 Status = CcRosUnmapCacheSegment(Bcb, FileOffset, Dirty);
983 #else
984 Status = STATUS_SUCCESS;
985 #endif
986 if (!NT_SUCCESS(Status))
987 {
988 DPRINT1("CcRosUnmapCacheSegment failed, status = %x\n", Status);
989 KeBugCheck(MEMORY_MANAGEMENT);
990 }
991 }
992 }
993
994 SavedSwapEntry = MmGetSavedSwapEntryPage(Page);
995 if (SavedSwapEntry == 0)
996 {
997 if (!PageOut &&
998 ((Segment->Flags & MM_PAGEFILE_SEGMENT) ||
999 (Segment->Characteristics & IMAGE_SCN_MEM_SHARED)))
1000 {
1001 /*
1002 * FIXME:
1003 * Try to page out this page and set the swap entry
1004 * within the section segment. There exist no rmap entry
1005 * for this page. The pager thread can't page out a
1006 * page without a rmap entry.
1007 */
1008 MmSetPageEntrySectionSegment(Segment, Offset, Entry);
1009 }
1010 else
1011 {
1012 MmSetPageEntrySectionSegment(Segment, Offset, 0);
1013 if (!IsDirectMapped)
1014 {
1015 MmReleasePageMemoryConsumer(MC_USER, Page);
1016 }
1017 }
1018 }
1019 else
1020 {
1021 if ((Segment->Flags & MM_PAGEFILE_SEGMENT) ||
1022 (Segment->Characteristics & IMAGE_SCN_MEM_SHARED))
1023 {
1024 if (!PageOut)
1025 {
1026 if (Dirty)
1027 {
1028 /*
1029 * FIXME:
1030 * We hold all locks. Nobody can do something with the current
1031 * process and the current segment (also not within an other process).
1032 */
1033 NTSTATUS Status;
1034 Status = MmWriteToSwapPage(SavedSwapEntry, Page);
1035 if (!NT_SUCCESS(Status))
1036 {
1037 DPRINT1("MM: Failed to write to swap page (Status was 0x%.8X)\n", Status);
1038 KeBugCheck(MEMORY_MANAGEMENT);
1039 }
1040 }
1041 MmSetPageEntrySectionSegment(Segment, Offset, MAKE_SWAP_SSE(SavedSwapEntry));
1042 MmSetSavedSwapEntryPage(Page, 0);
1043 }
1044 MmReleasePageMemoryConsumer(MC_USER, Page);
1045 }
1046 else
1047 {
1048 DPRINT1("Found a swapentry for a non private page in an image or data file sgment\n");
1049 KeBugCheck(MEMORY_MANAGEMENT);
1050 }
1051 }
1052 }
1053 else
1054 {
1055 MmSetPageEntrySectionSegment(Segment, Offset, Entry);
1056 }
1057 return(SHARE_COUNT_FROM_SSE(Entry) > 0);
1058 }
1059
1060 BOOLEAN MiIsPageFromCache(PMEMORY_AREA MemoryArea,
1061 ULONG SegOffset)
1062 {
1063 #ifndef NEWCC
1064 if (!(MemoryArea->Data.SectionData.Segment->Characteristics & IMAGE_SCN_MEM_SHARED))
1065 {
1066 PBCB Bcb;
1067 PCACHE_SEGMENT CacheSeg;
1068 Bcb = MemoryArea->Data.SectionData.Section->FileObject->SectionObjectPointer->SharedCacheMap;
1069 CacheSeg = CcRosLookupCacheSegment(Bcb, SegOffset + MemoryArea->Data.SectionData.Segment->FileOffset);
1070 if (CacheSeg)
1071 {
1072 CcRosReleaseCacheSegment(Bcb, CacheSeg, CacheSeg->Valid, FALSE, TRUE);
1073 return TRUE;
1074 }
1075 }
1076 #endif
1077 return FALSE;
1078 }
1079
1080 NTSTATUS
1081 NTAPI
1082 MiCopyFromUserPage(PFN_NUMBER DestPage, PVOID SourceAddress)
1083 {
1084 PEPROCESS Process;
1085 KIRQL Irql;
1086 PVOID TempAddress;
1087
1088 Process = PsGetCurrentProcess();
1089 TempAddress = MiMapPageInHyperSpace(Process, DestPage, &Irql);
1090 if (TempAddress == NULL)
1091 {
1092 return(STATUS_NO_MEMORY);
1093 }
1094 memcpy(TempAddress, SourceAddress, PAGE_SIZE);
1095 MiUnmapPageInHyperSpace(Process, TempAddress, Irql);
1096 return(STATUS_SUCCESS);
1097 }
1098
1099 #ifndef NEWCC
1100 NTSTATUS
1101 NTAPI
1102 MiReadPage(PMEMORY_AREA MemoryArea,
1103 ULONG_PTR SegOffset,
1104 PPFN_NUMBER Page)
1105 /*
1106 * FUNCTION: Read a page for a section backed memory area.
1107 * PARAMETERS:
1108 * MemoryArea - Memory area to read the page for.
1109 * Offset - Offset of the page to read.
1110 * Page - Variable that receives a page contains the read data.
1111 */
1112 {
1113 ULONG BaseOffset;
1114 ULONG_PTR FileOffset;
1115 PVOID BaseAddress;
1116 BOOLEAN UptoDate;
1117 PCACHE_SEGMENT CacheSeg;
1118 PFILE_OBJECT FileObject;
1119 NTSTATUS Status;
1120 ULONG_PTR RawLength;
1121 PBCB Bcb;
1122 BOOLEAN IsImageSection;
1123 ULONG_PTR Length;
1124
1125 FileObject = MemoryArea->Data.SectionData.Section->FileObject;
1126 Bcb = FileObject->SectionObjectPointer->SharedCacheMap;
1127 RawLength = MemoryArea->Data.SectionData.Segment->RawLength;
1128 FileOffset = SegOffset + MemoryArea->Data.SectionData.Segment->FileOffset;
1129 IsImageSection = MemoryArea->Data.SectionData.Section->AllocationAttributes & SEC_IMAGE ? TRUE : FALSE;
1130
1131 ASSERT(Bcb);
1132
1133 DPRINT("%S %x\n", FileObject->FileName.Buffer, FileOffset);
1134
1135 /*
1136 * If the file system is letting us go directly to the cache and the
1137 * memory area was mapped at an offset in the file which is page aligned
1138 * then get the related cache segment.
1139 */
1140 if ((FileOffset % PAGE_SIZE) == 0 &&
1141 (SegOffset + PAGE_SIZE <= RawLength || !IsImageSection) &&
1142 !(MemoryArea->Data.SectionData.Segment->Characteristics & IMAGE_SCN_MEM_SHARED))
1143 {
1144
1145 /*
1146 * Get the related cache segment; we use a lower level interface than
1147 * filesystems do because it is safe for us to use an offset with a
1148 * alignment less than the file system block size.
1149 */
1150 Status = CcRosGetCacheSegment(Bcb,
1151 (ULONG)FileOffset,
1152 &BaseOffset,
1153 &BaseAddress,
1154 &UptoDate,
1155 &CacheSeg);
1156 if (!NT_SUCCESS(Status))
1157 {
1158 return(Status);
1159 }
1160 if (!UptoDate)
1161 {
1162 /*
1163 * If the cache segment isn't up to date then call the file
1164 * system to read in the data.
1165 */
1166 Status = ReadCacheSegment(CacheSeg);
1167 if (!NT_SUCCESS(Status))
1168 {
1169 CcRosReleaseCacheSegment(Bcb, CacheSeg, FALSE, FALSE, FALSE);
1170 return Status;
1171 }
1172 }
1173 /*
1174 * Retrieve the page from the cache segment that we actually want.
1175 */
1176 (*Page) = MmGetPhysicalAddress((char*)BaseAddress +
1177 FileOffset - BaseOffset).LowPart >> PAGE_SHIFT;
1178
1179 CcRosReleaseCacheSegment(Bcb, CacheSeg, TRUE, FALSE, TRUE);
1180 }
1181 else
1182 {
1183 PEPROCESS Process;
1184 KIRQL Irql;
1185 PVOID PageAddr;
1186 ULONG_PTR CacheSegOffset;
1187
1188 /*
1189 * Allocate a page, this is rather complicated by the possibility
1190 * we might have to move other things out of memory
1191 */
1192 MI_SET_USAGE(MI_USAGE_SECTION);
1193 MI_SET_PROCESS2(PsGetCurrentProcess()->ImageFileName);
1194 Status = MmRequestPageMemoryConsumer(MC_USER, TRUE, Page);
1195 if (!NT_SUCCESS(Status))
1196 {
1197 return(Status);
1198 }
1199 Status = CcRosGetCacheSegment(Bcb,
1200 (ULONG)FileOffset,
1201 &BaseOffset,
1202 &BaseAddress,
1203 &UptoDate,
1204 &CacheSeg);
1205 if (!NT_SUCCESS(Status))
1206 {
1207 return(Status);
1208 }
1209 if (!UptoDate)
1210 {
1211 /*
1212 * If the cache segment isn't up to date then call the file
1213 * system to read in the data.
1214 */
1215 Status = ReadCacheSegment(CacheSeg);
1216 if (!NT_SUCCESS(Status))
1217 {
1218 CcRosReleaseCacheSegment(Bcb, CacheSeg, FALSE, FALSE, FALSE);
1219 return Status;
1220 }
1221 }
1222
1223 Process = PsGetCurrentProcess();
1224 PageAddr = MiMapPageInHyperSpace(Process, *Page, &Irql);
1225 CacheSegOffset = BaseOffset + CacheSeg->Bcb->CacheSegmentSize - FileOffset;
1226 Length = RawLength - SegOffset;
1227 if (Length <= CacheSegOffset && Length <= PAGE_SIZE)
1228 {
1229 memcpy(PageAddr, (char*)BaseAddress + FileOffset - BaseOffset, Length);
1230 }
1231 else if (CacheSegOffset >= PAGE_SIZE)
1232 {
1233 memcpy(PageAddr, (char*)BaseAddress + FileOffset - BaseOffset, PAGE_SIZE);
1234 }
1235 else
1236 {
1237 memcpy(PageAddr, (char*)BaseAddress + FileOffset - BaseOffset, CacheSegOffset);
1238 MiUnmapPageInHyperSpace(Process, PageAddr, Irql);
1239 CcRosReleaseCacheSegment(Bcb, CacheSeg, TRUE, FALSE, FALSE);
1240 Status = CcRosGetCacheSegment(Bcb,
1241 (ULONG)(FileOffset + CacheSegOffset),
1242 &BaseOffset,
1243 &BaseAddress,
1244 &UptoDate,
1245 &CacheSeg);
1246 if (!NT_SUCCESS(Status))
1247 {
1248 return(Status);
1249 }
1250 if (!UptoDate)
1251 {
1252 /*
1253 * If the cache segment isn't up to date then call the file
1254 * system to read in the data.
1255 */
1256 Status = ReadCacheSegment(CacheSeg);
1257 if (!NT_SUCCESS(Status))
1258 {
1259 CcRosReleaseCacheSegment(Bcb, CacheSeg, FALSE, FALSE, FALSE);
1260 return Status;
1261 }
1262 }
1263 PageAddr = MiMapPageInHyperSpace(Process, *Page, &Irql);
1264 if (Length < PAGE_SIZE)
1265 {
1266 memcpy((char*)PageAddr + CacheSegOffset, BaseAddress, Length - CacheSegOffset);
1267 }
1268 else
1269 {
1270 memcpy((char*)PageAddr + CacheSegOffset, BaseAddress, PAGE_SIZE - CacheSegOffset);
1271 }
1272 }
1273 MiUnmapPageInHyperSpace(Process, PageAddr, Irql);
1274 CcRosReleaseCacheSegment(Bcb, CacheSeg, TRUE, FALSE, FALSE);
1275 }
1276 return(STATUS_SUCCESS);
1277 }
1278 #else
1279 NTSTATUS
1280 NTAPI
1281 MiReadPage(PMEMORY_AREA MemoryArea,
1282 ULONG SegOffset,
1283 PPFN_NUMBER Page)
1284 /*
1285 * FUNCTION: Read a page for a section backed memory area.
1286 * PARAMETERS:
1287 * MemoryArea - Memory area to read the page for.
1288 * Offset - Offset of the page to read.
1289 * Page - Variable that receives a page contains the read data.
1290 */
1291 {
1292 MM_REQUIRED_RESOURCES Resources = { };
1293
1294 Resources.Context = MemoryArea->Data.SectionData.Section->FileObject;
1295 Resources.FileOffset.QuadPart = SegOffset +
1296 MemoryArea->Data.SectionData.Segment->FileOffset;
1297 Resources.Consumer = MC_USER;
1298 Resources.Amount = PAGE_SIZE;
1299
1300 DPRINT1("%S, offset %x, len %d, page %x\n", ((PFILE_OBJECT)Resources.Context)->FileName.Buffer, Resources.FileOffset.LowPart, Resources.Amount, Resources.Page[0]);
1301
1302 NTSTATUS Status = MiReadFilePage(NULL, NULL, &Resources);
1303 *Page = Resources.Page[0];
1304 return Status;
1305 }
1306 #endif
1307
1308 NTSTATUS
1309 NTAPI
1310 MmNotPresentFaultSectionView(PMMSUPPORT AddressSpace,
1311 MEMORY_AREA* MemoryArea,
1312 PVOID Address)
1313 {
1314 ULONG Offset;
1315 PFN_NUMBER Page;
1316 NTSTATUS Status;
1317 PROS_SECTION_OBJECT Section;
1318 PMM_SECTION_SEGMENT Segment;
1319 ULONG_PTR Entry;
1320 ULONG_PTR Entry1;
1321 ULONG Attributes;
1322 PMM_PAGEOP PageOp;
1323 PMM_REGION Region;
1324 BOOLEAN HasSwapEntry;
1325 PEPROCESS Process = MmGetAddressSpaceOwner(AddressSpace);
1326
1327 /*
1328 * There is a window between taking the page fault and locking the
1329 * address space when another thread could load the page so we check
1330 * that.
1331 */
1332 if (MmIsPagePresent(Process, Address))
1333 {
1334 return(STATUS_SUCCESS);
1335 }
1336
1337 /*
1338 * Check for the virtual memory area being deleted.
1339 */
1340 if (MemoryArea->DeleteInProgress)
1341 {
1342 return(STATUS_UNSUCCESSFUL);
1343 }
1344
1345 Address = MM_ROUND_DOWN(Address, PAGE_SIZE);
1346 Offset = (ULONG)((ULONG_PTR)Address - (ULONG_PTR)MemoryArea->StartingAddress
1347 + MemoryArea->Data.SectionData.ViewOffset);
1348
1349 Segment = MemoryArea->Data.SectionData.Segment;
1350 Section = MemoryArea->Data.SectionData.Section;
1351 Region = MmFindRegion(MemoryArea->StartingAddress,
1352 &MemoryArea->Data.SectionData.RegionListHead,
1353 Address, NULL);
1354 /*
1355 * Lock the segment
1356 */
1357 MmLockSectionSegment(Segment);
1358
1359 /*
1360 * Check if this page needs to be mapped COW
1361 */
1362 if ((Segment->WriteCopy) &&
1363 (Region->Protect == PAGE_READWRITE ||
1364 Region->Protect == PAGE_EXECUTE_READWRITE))
1365 {
1366 Attributes = Region->Protect == PAGE_READWRITE ? PAGE_READONLY : PAGE_EXECUTE_READ;
1367 }
1368 else
1369 {
1370 Attributes = Region->Protect;
1371 }
1372
1373 /*
1374 * Get or create a page operation descriptor
1375 */
1376 PageOp = MmGetPageOp(MemoryArea, NULL, 0, Segment, Offset, MM_PAGEOP_PAGEIN, FALSE);
1377 if (PageOp == NULL)
1378 {
1379 DPRINT1("MmGetPageOp failed\n");
1380 KeBugCheck(MEMORY_MANAGEMENT);
1381 }
1382
1383 /*
1384 * Check if someone else is already handling this fault, if so wait
1385 * for them
1386 */
1387 if (PageOp->Thread != PsGetCurrentThread())
1388 {
1389 MmUnlockSectionSegment(Segment);
1390 MmUnlockAddressSpace(AddressSpace);
1391 Status = MmspWaitForPageOpCompletionEvent(PageOp);
1392 /*
1393 * Check for various strange conditions
1394 */
1395 if (Status != STATUS_SUCCESS)
1396 {
1397 DPRINT1("Failed to wait for page op, status = %x\n", Status);
1398 KeBugCheck(MEMORY_MANAGEMENT);
1399 }
1400 if (PageOp->Status == STATUS_PENDING)
1401 {
1402 DPRINT1("Woke for page op before completion\n");
1403 KeBugCheck(MEMORY_MANAGEMENT);
1404 }
1405 MmLockAddressSpace(AddressSpace);
1406 /*
1407 * If this wasn't a pagein then restart the operation
1408 */
1409 if (PageOp->OpType != MM_PAGEOP_PAGEIN)
1410 {
1411 MmspCompleteAndReleasePageOp(PageOp);
1412 DPRINT("Address 0x%.8X\n", Address);
1413 return(STATUS_MM_RESTART_OPERATION);
1414 }
1415
1416 /*
1417 * If the thread handling this fault has failed then we don't retry
1418 */
1419 if (!NT_SUCCESS(PageOp->Status))
1420 {
1421 Status = PageOp->Status;
1422 MmspCompleteAndReleasePageOp(PageOp);
1423 DPRINT("Address 0x%.8X\n", Address);
1424 return(Status);
1425 }
1426 MmLockSectionSegment(Segment);
1427 /*
1428 * If the completed fault was for another address space then set the
1429 * page in this one.
1430 */
1431 if (!MmIsPagePresent(Process, Address))
1432 {
1433 Entry = MmGetPageEntrySectionSegment(Segment, Offset);
1434 HasSwapEntry = MmIsPageSwapEntry(Process, (PVOID)Address);
1435
1436 if (PAGE_FROM_SSE(Entry) == 0 || HasSwapEntry)
1437 {
1438 /*
1439 * The page was a private page in another or in our address space
1440 */
1441 MmUnlockSectionSegment(Segment);
1442 MmspCompleteAndReleasePageOp(PageOp);
1443 return(STATUS_MM_RESTART_OPERATION);
1444 }
1445
1446 Page = PFN_FROM_SSE(Entry);
1447
1448 MmSharePageEntrySectionSegment(Segment, Offset);
1449
1450 /* FIXME: Should we call MmCreateVirtualMappingUnsafe if
1451 * (Section->AllocationAttributes & SEC_PHYSICALMEMORY) is true?
1452 */
1453 Status = MmCreateVirtualMapping(Process,
1454 Address,
1455 Attributes,
1456 &Page,
1457 1);
1458 if (!NT_SUCCESS(Status))
1459 {
1460 DPRINT1("Unable to create virtual mapping\n");
1461 KeBugCheck(MEMORY_MANAGEMENT);
1462 }
1463 MmInsertRmap(Page, Process, Address);
1464 }
1465 MmUnlockSectionSegment(Segment);
1466 PageOp->Status = STATUS_SUCCESS;
1467 MmspCompleteAndReleasePageOp(PageOp);
1468 DPRINT("Address 0x%.8X\n", Address);
1469 return(STATUS_SUCCESS);
1470 }
1471
1472 HasSwapEntry = MmIsPageSwapEntry(Process, Address);
1473 if (HasSwapEntry)
1474 {
1475 /*
1476 * Must be private page we have swapped out.
1477 */
1478 SWAPENTRY SwapEntry;
1479
1480 /*
1481 * Sanity check
1482 */
1483 if (Segment->Flags & MM_PAGEFILE_SEGMENT)
1484 {
1485 DPRINT1("Found a swaped out private page in a pagefile section.\n");
1486 KeBugCheck(MEMORY_MANAGEMENT);
1487 }
1488
1489 MmUnlockSectionSegment(Segment);
1490 MmDeletePageFileMapping(Process, Address, &SwapEntry);
1491
1492 MmUnlockAddressSpace(AddressSpace);
1493 MI_SET_USAGE(MI_USAGE_SECTION);
1494 if (Process) MI_SET_PROCESS2(Process->ImageFileName);
1495 if (!Process) MI_SET_PROCESS2("Kernel Section");
1496 Status = MmRequestPageMemoryConsumer(MC_USER, TRUE, &Page);
1497 if (!NT_SUCCESS(Status))
1498 {
1499 KeBugCheck(MEMORY_MANAGEMENT);
1500 }
1501
1502 Status = MmReadFromSwapPage(SwapEntry, Page);
1503 if (!NT_SUCCESS(Status))
1504 {
1505 DPRINT1("MmReadFromSwapPage failed, status = %x\n", Status);
1506 KeBugCheck(MEMORY_MANAGEMENT);
1507 }
1508 MmLockAddressSpace(AddressSpace);
1509 Status = MmCreateVirtualMapping(Process,
1510 Address,
1511 Region->Protect,
1512 &Page,
1513 1);
1514 if (!NT_SUCCESS(Status))
1515 {
1516 DPRINT("MmCreateVirtualMapping failed, not out of memory\n");
1517 KeBugCheck(MEMORY_MANAGEMENT);
1518 return(Status);
1519 }
1520
1521 /*
1522 * Store the swap entry for later use.
1523 */
1524 MmSetSavedSwapEntryPage(Page, SwapEntry);
1525
1526 /*
1527 * Add the page to the process's working set
1528 */
1529 MmInsertRmap(Page, Process, Address);
1530 /*
1531 * Finish the operation
1532 */
1533 PageOp->Status = STATUS_SUCCESS;
1534 MmspCompleteAndReleasePageOp(PageOp);
1535 DPRINT("Address 0x%.8X\n", Address);
1536 return(STATUS_SUCCESS);
1537 }
1538
1539 /*
1540 * Satisfying a page fault on a map of /Device/PhysicalMemory is easy
1541 */
1542 if (Section->AllocationAttributes & SEC_PHYSICALMEMORY)
1543 {
1544 MmUnlockSectionSegment(Segment);
1545 /*
1546 * Just map the desired physical page
1547 */
1548 Page = Offset >> PAGE_SHIFT;
1549 Status = MmCreateVirtualMappingUnsafe(Process,
1550 Address,
1551 Region->Protect,
1552 &Page,
1553 1);
1554 if (!NT_SUCCESS(Status))
1555 {
1556 DPRINT("MmCreateVirtualMappingUnsafe failed, not out of memory\n");
1557 KeBugCheck(MEMORY_MANAGEMENT);
1558 return(Status);
1559 }
1560
1561 /*
1562 * Cleanup and release locks
1563 */
1564 PageOp->Status = STATUS_SUCCESS;
1565 MmspCompleteAndReleasePageOp(PageOp);
1566 DPRINT("Address 0x%.8X\n", Address);
1567 return(STATUS_SUCCESS);
1568 }
1569
1570 /*
1571 * Map anonymous memory for BSS sections
1572 */
1573 if (Segment->Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA)
1574 {
1575 MmUnlockSectionSegment(Segment);
1576 MI_SET_USAGE(MI_USAGE_SECTION);
1577 if (Process) MI_SET_PROCESS2(Process->ImageFileName);
1578 if (!Process) MI_SET_PROCESS2("Kernel Section");
1579 Status = MmRequestPageMemoryConsumer(MC_USER, FALSE, &Page);
1580 if (!NT_SUCCESS(Status))
1581 {
1582 MmUnlockAddressSpace(AddressSpace);
1583 Status = MmRequestPageMemoryConsumer(MC_USER, TRUE, &Page);
1584 MmLockAddressSpace(AddressSpace);
1585 }
1586 if (!NT_SUCCESS(Status))
1587 {
1588 KeBugCheck(MEMORY_MANAGEMENT);
1589 }
1590 Status = MmCreateVirtualMapping(Process,
1591 Address,
1592 Region->Protect,
1593 &Page,
1594 1);
1595 if (!NT_SUCCESS(Status))
1596 {
1597 DPRINT("MmCreateVirtualMapping failed, not out of memory\n");
1598 KeBugCheck(MEMORY_MANAGEMENT);
1599 return(Status);
1600 }
1601 MmInsertRmap(Page, Process, Address);
1602
1603 /*
1604 * Cleanup and release locks
1605 */
1606 PageOp->Status = STATUS_SUCCESS;
1607 MmspCompleteAndReleasePageOp(PageOp);
1608 DPRINT("Address 0x%.8X\n", Address);
1609 return(STATUS_SUCCESS);
1610 }
1611
1612 /*
1613 * Get the entry corresponding to the offset within the section
1614 */
1615 Entry = MmGetPageEntrySectionSegment(Segment, Offset);
1616
1617 if (Entry == 0)
1618 {
1619 /*
1620 * If the entry is zero (and it can't change because we have
1621 * locked the segment) then we need to load the page.
1622 */
1623
1624 /*
1625 * Release all our locks and read in the page from disk
1626 */
1627 MmUnlockSectionSegment(Segment);
1628 MmUnlockAddressSpace(AddressSpace);
1629
1630 if ((Segment->Flags & MM_PAGEFILE_SEGMENT) ||
1631 (Offset >= PAGE_ROUND_UP(Segment->RawLength) && Section->AllocationAttributes & SEC_IMAGE))
1632 {
1633 MI_SET_USAGE(MI_USAGE_SECTION);
1634 if (Process) MI_SET_PROCESS2(Process->ImageFileName);
1635 if (!Process) MI_SET_PROCESS2("Kernel Section");
1636 Status = MmRequestPageMemoryConsumer(MC_USER, TRUE, &Page);
1637 if (!NT_SUCCESS(Status))
1638 {
1639 DPRINT1("MmRequestPageMemoryConsumer failed (Status %x)\n", Status);
1640 }
1641
1642 }
1643 else
1644 {
1645 Status = MiReadPage(MemoryArea, Offset, &Page);
1646 if (!NT_SUCCESS(Status))
1647 {
1648 DPRINT1("MiReadPage failed (Status %x)\n", Status);
1649 }
1650 }
1651 if (!NT_SUCCESS(Status))
1652 {
1653 /*
1654 * FIXME: What do we know in this case?
1655 */
1656 /*
1657 * Cleanup and release locks
1658 */
1659 MmLockAddressSpace(AddressSpace);
1660 PageOp->Status = Status;
1661 MmspCompleteAndReleasePageOp(PageOp);
1662 DPRINT("Address 0x%.8X\n", Address);
1663 return(Status);
1664 }
1665 /*
1666 * Relock the address space and segment
1667 */
1668 MmLockAddressSpace(AddressSpace);
1669 MmLockSectionSegment(Segment);
1670
1671 /*
1672 * Check the entry. No one should change the status of a page
1673 * that has a pending page-in.
1674 */
1675 Entry1 = MmGetPageEntrySectionSegment(Segment, Offset);
1676 if (Entry != Entry1)
1677 {
1678 DPRINT1("Someone changed ppte entry while we slept\n");
1679 KeBugCheck(MEMORY_MANAGEMENT);
1680 }
1681
1682 /*
1683 * Mark the offset within the section as having valid, in-memory
1684 * data
1685 */
1686 Entry = MAKE_SSE(Page << PAGE_SHIFT, 1);
1687 MmSetPageEntrySectionSegment(Segment, Offset, Entry);
1688 MmUnlockSectionSegment(Segment);
1689
1690 Status = MmCreateVirtualMapping(Process,
1691 Address,
1692 Attributes,
1693 &Page,
1694 1);
1695 if (!NT_SUCCESS(Status))
1696 {
1697 DPRINT1("Unable to create virtual mapping\n");
1698 KeBugCheck(MEMORY_MANAGEMENT);
1699 }
1700 MmInsertRmap(Page, Process, Address);
1701
1702 PageOp->Status = STATUS_SUCCESS;
1703 MmspCompleteAndReleasePageOp(PageOp);
1704 DPRINT("Address 0x%.8X\n", Address);
1705 return(STATUS_SUCCESS);
1706 }
1707 else if (IS_SWAP_FROM_SSE(Entry))
1708 {
1709 SWAPENTRY SwapEntry;
1710
1711 SwapEntry = SWAPENTRY_FROM_SSE(Entry);
1712
1713 /*
1714 * Release all our locks and read in the page from disk
1715 */
1716 MmUnlockSectionSegment(Segment);
1717
1718 MmUnlockAddressSpace(AddressSpace);
1719 MI_SET_USAGE(MI_USAGE_SECTION);
1720 if (Process) MI_SET_PROCESS2(Process->ImageFileName);
1721 if (!Process) MI_SET_PROCESS2("Kernel Section");
1722 Status = MmRequestPageMemoryConsumer(MC_USER, TRUE, &Page);
1723 if (!NT_SUCCESS(Status))
1724 {
1725 KeBugCheck(MEMORY_MANAGEMENT);
1726 }
1727
1728 Status = MmReadFromSwapPage(SwapEntry, Page);
1729 if (!NT_SUCCESS(Status))
1730 {
1731 KeBugCheck(MEMORY_MANAGEMENT);
1732 }
1733
1734 /*
1735 * Relock the address space and segment
1736 */
1737 MmLockAddressSpace(AddressSpace);
1738 MmLockSectionSegment(Segment);
1739
1740 /*
1741 * Check the entry. No one should change the status of a page
1742 * that has a pending page-in.
1743 */
1744 Entry1 = MmGetPageEntrySectionSegment(Segment, Offset);
1745 if (Entry != Entry1)
1746 {
1747 DPRINT1("Someone changed ppte entry while we slept\n");
1748 KeBugCheck(MEMORY_MANAGEMENT);
1749 }
1750
1751 /*
1752 * Mark the offset within the section as having valid, in-memory
1753 * data
1754 */
1755 Entry = MAKE_SSE(Page << PAGE_SHIFT, 1);
1756 MmSetPageEntrySectionSegment(Segment, Offset, Entry);
1757 MmUnlockSectionSegment(Segment);
1758
1759 /*
1760 * Save the swap entry.
1761 */
1762 MmSetSavedSwapEntryPage(Page, SwapEntry);
1763 Status = MmCreateVirtualMapping(Process,
1764 Address,
1765 Region->Protect,
1766 &Page,
1767 1);
1768 if (!NT_SUCCESS(Status))
1769 {
1770 DPRINT1("Unable to create virtual mapping\n");
1771 KeBugCheck(MEMORY_MANAGEMENT);
1772 }
1773 MmInsertRmap(Page, Process, Address);
1774 PageOp->Status = STATUS_SUCCESS;
1775 MmspCompleteAndReleasePageOp(PageOp);
1776 DPRINT("Address 0x%.8X\n", Address);
1777 return(STATUS_SUCCESS);
1778 }
1779 else
1780 {
1781 /*
1782 * If the section offset is already in-memory and valid then just
1783 * take another reference to the page
1784 */
1785
1786 Page = PFN_FROM_SSE(Entry);
1787
1788 MmSharePageEntrySectionSegment(Segment, Offset);
1789 MmUnlockSectionSegment(Segment);
1790
1791 Status = MmCreateVirtualMapping(Process,
1792 Address,
1793 Attributes,
1794 &Page,
1795 1);
1796 if (!NT_SUCCESS(Status))
1797 {
1798 DPRINT1("Unable to create virtual mapping\n");
1799 KeBugCheck(MEMORY_MANAGEMENT);
1800 }
1801 MmInsertRmap(Page, Process, Address);
1802 PageOp->Status = STATUS_SUCCESS;
1803 MmspCompleteAndReleasePageOp(PageOp);
1804 DPRINT("Address 0x%.8X\n", Address);
1805 return(STATUS_SUCCESS);
1806 }
1807 }
1808
1809 NTSTATUS
1810 NTAPI
1811 MmAccessFaultSectionView(PMMSUPPORT AddressSpace,
1812 MEMORY_AREA* MemoryArea,
1813 PVOID Address)
1814 {
1815 PMM_SECTION_SEGMENT Segment;
1816 PROS_SECTION_OBJECT Section;
1817 PFN_NUMBER OldPage;
1818 PFN_NUMBER NewPage;
1819 NTSTATUS Status;
1820 ULONG Offset;
1821 PMM_PAGEOP PageOp;
1822 PMM_REGION Region;
1823 ULONG Entry;
1824 PEPROCESS Process = MmGetAddressSpaceOwner(AddressSpace);
1825
1826 DPRINT("MmAccessFaultSectionView(%x, %x, %x, %x)\n", AddressSpace, MemoryArea, Address);
1827
1828 /*
1829 * Check if the page has already been set readwrite
1830 */
1831 if (MmGetPageProtect(Process, Address) & PAGE_READWRITE)
1832 {
1833 DPRINT("Address 0x%.8X\n", Address);
1834 return(STATUS_SUCCESS);
1835 }
1836
1837 /*
1838 * Find the offset of the page
1839 */
1840 Address = MM_ROUND_DOWN(Address, PAGE_SIZE);
1841 Offset = (ULONG)((ULONG_PTR)Address - (ULONG_PTR)MemoryArea->StartingAddress
1842 + MemoryArea->Data.SectionData.ViewOffset);
1843
1844 Segment = MemoryArea->Data.SectionData.Segment;
1845 Section = MemoryArea->Data.SectionData.Section;
1846 Region = MmFindRegion(MemoryArea->StartingAddress,
1847 &MemoryArea->Data.SectionData.RegionListHead,
1848 Address, NULL);
1849 /*
1850 * Lock the segment
1851 */
1852 MmLockSectionSegment(Segment);
1853
1854 OldPage = MmGetPfnForProcess(Process, Address);
1855 Entry = MmGetPageEntrySectionSegment(Segment, Offset);
1856
1857 MmUnlockSectionSegment(Segment);
1858
1859 /*
1860 * Check if we are doing COW
1861 */
1862 if (!((Segment->WriteCopy) &&
1863 (Region->Protect == PAGE_READWRITE ||
1864 Region->Protect == PAGE_EXECUTE_READWRITE)))
1865 {
1866 DPRINT("Address 0x%.8X\n", Address);
1867 return(STATUS_ACCESS_VIOLATION);
1868 }
1869
1870 if (IS_SWAP_FROM_SSE(Entry) ||
1871 PFN_FROM_SSE(Entry) != OldPage)
1872 {
1873 /* This is a private page. We must only change the page protection. */
1874 MmSetPageProtect(Process, Address, Region->Protect);
1875 return(STATUS_SUCCESS);
1876 }
1877
1878 /*
1879 * Get or create a pageop
1880 */
1881 PageOp = MmGetPageOp(MemoryArea, NULL, 0, Segment, Offset,
1882 MM_PAGEOP_ACCESSFAULT, FALSE);
1883 if (PageOp == NULL)
1884 {
1885 DPRINT1("MmGetPageOp failed\n");
1886 KeBugCheck(MEMORY_MANAGEMENT);
1887 }
1888
1889 /*
1890 * Wait for any other operations to complete
1891 */
1892 if (PageOp->Thread != PsGetCurrentThread())
1893 {
1894 MmUnlockAddressSpace(AddressSpace);
1895 Status = MmspWaitForPageOpCompletionEvent(PageOp);
1896 /*
1897 * Check for various strange conditions
1898 */
1899 if (Status == STATUS_TIMEOUT)
1900 {
1901 DPRINT1("Failed to wait for page op, status = %x\n", Status);
1902 KeBugCheck(MEMORY_MANAGEMENT);
1903 }
1904 if (PageOp->Status == STATUS_PENDING)
1905 {
1906 DPRINT1("Woke for page op before completion\n");
1907 KeBugCheck(MEMORY_MANAGEMENT);
1908 }
1909 /*
1910 * Restart the operation
1911 */
1912 MmLockAddressSpace(AddressSpace);
1913 MmspCompleteAndReleasePageOp(PageOp);
1914 DPRINT("Address 0x%.8X\n", Address);
1915 return(STATUS_MM_RESTART_OPERATION);
1916 }
1917
1918 /*
1919 * Release locks now we have the pageop
1920 */
1921 MmUnlockAddressSpace(AddressSpace);
1922
1923 /*
1924 * Allocate a page
1925 */
1926 MI_SET_USAGE(MI_USAGE_SECTION);
1927 if (Process) MI_SET_PROCESS2(Process->ImageFileName);
1928 if (!Process) MI_SET_PROCESS2("Kernel Section");
1929 Status = MmRequestPageMemoryConsumer(MC_USER, TRUE, &NewPage);
1930 if (!NT_SUCCESS(Status))
1931 {
1932 KeBugCheck(MEMORY_MANAGEMENT);
1933 }
1934
1935 /*
1936 * Copy the old page
1937 */
1938 MiCopyFromUserPage(NewPage, Address);
1939
1940 MmLockAddressSpace(AddressSpace);
1941 /*
1942 * Delete the old entry.
1943 */
1944 MmDeleteVirtualMapping(Process, Address, FALSE, NULL, NULL);
1945
1946 /*
1947 * Set the PTE to point to the new page
1948 */
1949 Status = MmCreateVirtualMapping(Process,
1950 Address,
1951 Region->Protect,
1952 &NewPage,
1953 1);
1954 if (!NT_SUCCESS(Status))
1955 {
1956 DPRINT("MmCreateVirtualMapping failed, not out of memory\n");
1957 KeBugCheck(MEMORY_MANAGEMENT);
1958 return(Status);
1959 }
1960 if (!NT_SUCCESS(Status))
1961 {
1962 DPRINT1("Unable to create virtual mapping\n");
1963 KeBugCheck(MEMORY_MANAGEMENT);
1964 }
1965
1966 /*
1967 * Unshare the old page.
1968 */
1969 MmDeleteRmap(OldPage, Process, Address);
1970 MmInsertRmap(NewPage, Process, Address);
1971 MmLockSectionSegment(Segment);
1972 MmUnsharePageEntrySectionSegment(Section, Segment, Offset, FALSE, FALSE);
1973 MmUnlockSectionSegment(Segment);
1974
1975 PageOp->Status = STATUS_SUCCESS;
1976 MmspCompleteAndReleasePageOp(PageOp);
1977 DPRINT("Address 0x%.8X\n", Address);
1978 return(STATUS_SUCCESS);
1979 }
1980
1981 VOID
1982 MmPageOutDeleteMapping(PVOID Context, PEPROCESS Process, PVOID Address)
1983 {
1984 MM_SECTION_PAGEOUT_CONTEXT* PageOutContext;
1985 BOOLEAN WasDirty;
1986 PFN_NUMBER Page;
1987
1988 PageOutContext = (MM_SECTION_PAGEOUT_CONTEXT*)Context;
1989 if (Process)
1990 {
1991 MmLockAddressSpace(&Process->Vm);
1992 }
1993
1994 MmDeleteVirtualMapping(Process,
1995 Address,
1996 FALSE,
1997 &WasDirty,
1998 &Page);
1999 if (WasDirty)
2000 {
2001 PageOutContext->WasDirty = TRUE;
2002 }
2003 if (!PageOutContext->Private)
2004 {
2005 MmLockSectionSegment(PageOutContext->Segment);
2006 MmUnsharePageEntrySectionSegment((PROS_SECTION_OBJECT)PageOutContext->Section,
2007 PageOutContext->Segment,
2008 PageOutContext->Offset,
2009 PageOutContext->WasDirty,
2010 TRUE);
2011 MmUnlockSectionSegment(PageOutContext->Segment);
2012 }
2013 if (Process)
2014 {
2015 MmUnlockAddressSpace(&Process->Vm);
2016 }
2017
2018 if (PageOutContext->Private)
2019 {
2020 MmReleasePageMemoryConsumer(MC_USER, Page);
2021 }
2022
2023 DPRINT("PhysicalAddress %x, Address %x\n", Page << PAGE_SHIFT, Address);
2024 }
2025
2026 NTSTATUS
2027 NTAPI
2028 MmPageOutSectionView(PMMSUPPORT AddressSpace,
2029 MEMORY_AREA* MemoryArea,
2030 PVOID Address,
2031 PMM_PAGEOP PageOp)
2032 {
2033 PFN_NUMBER Page;
2034 MM_SECTION_PAGEOUT_CONTEXT Context;
2035 SWAPENTRY SwapEntry;
2036 ULONG Entry;
2037 ULONG FileOffset;
2038 NTSTATUS Status;
2039 PFILE_OBJECT FileObject;
2040 #ifndef NEWCC
2041 PBCB Bcb = NULL;
2042 #endif
2043 BOOLEAN DirectMapped;
2044 BOOLEAN IsImageSection;
2045 PEPROCESS Process = MmGetAddressSpaceOwner(AddressSpace);
2046 KIRQL OldIrql;
2047
2048 Address = (PVOID)PAGE_ROUND_DOWN(Address);
2049
2050 /*
2051 * Get the segment and section.
2052 */
2053 Context.Segment = MemoryArea->Data.SectionData.Segment;
2054 Context.Section = MemoryArea->Data.SectionData.Section;
2055
2056 Context.Offset = (ULONG)((ULONG_PTR)Address - (ULONG_PTR)MemoryArea->StartingAddress
2057 + MemoryArea->Data.SectionData.ViewOffset);
2058 FileOffset = Context.Offset + Context.Segment->FileOffset;
2059
2060 IsImageSection = Context.Section->AllocationAttributes & SEC_IMAGE ? TRUE : FALSE;
2061
2062 FileObject = Context.Section->FileObject;
2063 DirectMapped = FALSE;
2064 #ifndef NEWCC
2065 if (FileObject != NULL &&
2066 !(Context.Segment->Characteristics & IMAGE_SCN_MEM_SHARED))
2067 {
2068 Bcb = FileObject->SectionObjectPointer->SharedCacheMap;
2069
2070 /*
2071 * If the file system is letting us go directly to the cache and the
2072 * memory area was mapped at an offset in the file which is page aligned
2073 * then note this is a direct mapped page.
2074 */
2075 if ((FileOffset % PAGE_SIZE) == 0 &&
2076 (Context.Offset + PAGE_SIZE <= Context.Segment->RawLength || !IsImageSection))
2077 {
2078 DirectMapped = TRUE;
2079 }
2080 }
2081 #endif
2082
2083
2084 /*
2085 * This should never happen since mappings of physical memory are never
2086 * placed in the rmap lists.
2087 */
2088 if (Context.Section->AllocationAttributes & SEC_PHYSICALMEMORY)
2089 {
2090 DPRINT1("Trying to page out from physical memory section address 0x%X "
2091 "process %d\n", Address,
2092 Process ? Process->UniqueProcessId : 0);
2093 KeBugCheck(MEMORY_MANAGEMENT);
2094 }
2095
2096 /*
2097 * Get the section segment entry and the physical address.
2098 */
2099 Entry = MmGetPageEntrySectionSegment(Context.Segment, Context.Offset);
2100 if (!MmIsPagePresent(Process, Address))
2101 {
2102 DPRINT1("Trying to page out not-present page at (%d,0x%.8X).\n",
2103 Process ? Process->UniqueProcessId : 0, Address);
2104 KeBugCheck(MEMORY_MANAGEMENT);
2105 }
2106 Page = MmGetPfnForProcess(Process, Address);
2107 SwapEntry = MmGetSavedSwapEntryPage(Page);
2108
2109 /*
2110 * Prepare the context structure for the rmap delete call.
2111 */
2112 Context.WasDirty = FALSE;
2113 if (Context.Segment->Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA ||
2114 IS_SWAP_FROM_SSE(Entry) ||
2115 PFN_FROM_SSE(Entry) != Page)
2116 {
2117 Context.Private = TRUE;
2118 }
2119 else
2120 {
2121 Context.Private = FALSE;
2122 }
2123
2124 /*
2125 * Take an additional reference to the page or the cache segment.
2126 */
2127 if (DirectMapped && !Context.Private)
2128 {
2129 if(!MiIsPageFromCache(MemoryArea, Context.Offset))
2130 {
2131 DPRINT1("Direct mapped non private page is not associated with the cache.\n");
2132 KeBugCheck(MEMORY_MANAGEMENT);
2133 }
2134 }
2135 else
2136 {
2137 OldIrql = KeAcquireQueuedSpinLock(LockQueuePfnLock);
2138 MmReferencePage(Page);
2139 KeReleaseQueuedSpinLock(LockQueuePfnLock, OldIrql);
2140 }
2141
2142 MmDeleteAllRmaps(Page, (PVOID)&Context, MmPageOutDeleteMapping);
2143
2144 /*
2145 * If this wasn't a private page then we should have reduced the entry to
2146 * zero by deleting all the rmaps.
2147 */
2148 if (!Context.Private && MmGetPageEntrySectionSegment(Context.Segment, Context.Offset) != 0)
2149 {
2150 if (!(Context.Segment->Flags & MM_PAGEFILE_SEGMENT) &&
2151 !(Context.Segment->Characteristics & IMAGE_SCN_MEM_SHARED))
2152 {
2153 KeBugCheck(MEMORY_MANAGEMENT);
2154 }
2155 }
2156
2157 /*
2158 * If the page wasn't dirty then we can just free it as for a readonly page.
2159 * Since we unmapped all the mappings above we know it will not suddenly
2160 * become dirty.
2161 * If the page is from a pagefile section and has no swap entry,
2162 * we can't free the page at this point.
2163 */
2164 SwapEntry = MmGetSavedSwapEntryPage(Page);
2165 if (Context.Segment->Flags & MM_PAGEFILE_SEGMENT)
2166 {
2167 if (Context.Private)
2168 {
2169 DPRINT1("Found a %s private page (address %x) in a pagefile segment.\n",
2170 Context.WasDirty ? "dirty" : "clean", Address);
2171 KeBugCheck(MEMORY_MANAGEMENT);
2172 }
2173 if (!Context.WasDirty && SwapEntry != 0)
2174 {
2175 MmSetSavedSwapEntryPage(Page, 0);
2176 MmSetPageEntrySectionSegment(Context.Segment, Context.Offset, MAKE_SWAP_SSE(SwapEntry));
2177 MmReleasePageMemoryConsumer(MC_USER, Page);
2178 PageOp->Status = STATUS_SUCCESS;
2179 MmspCompleteAndReleasePageOp(PageOp);
2180 return(STATUS_SUCCESS);
2181 }
2182 }
2183 else if (Context.Segment->Characteristics & IMAGE_SCN_MEM_SHARED)
2184 {
2185 if (Context.Private)
2186 {
2187 DPRINT1("Found a %s private page (address %x) in a shared section segment.\n",
2188 Context.WasDirty ? "dirty" : "clean", Address);
2189 KeBugCheck(MEMORY_MANAGEMENT);
2190 }
2191 if (!Context.WasDirty || SwapEntry != 0)
2192 {
2193 MmSetSavedSwapEntryPage(Page, 0);
2194 if (SwapEntry != 0)
2195 {
2196 MmSetPageEntrySectionSegment(Context.Segment, Context.Offset, MAKE_SWAP_SSE(SwapEntry));
2197 }
2198 MmReleasePageMemoryConsumer(MC_USER, Page);
2199 PageOp->Status = STATUS_SUCCESS;
2200 MmspCompleteAndReleasePageOp(PageOp);
2201 return(STATUS_SUCCESS);
2202 }
2203 }
2204 else if (!Context.Private && DirectMapped)
2205 {
2206 if (SwapEntry != 0)
2207 {
2208 DPRINT1("Found a swapentry for a non private and direct mapped page (address %x)\n",
2209 Address);
2210 KeBugCheck(MEMORY_MANAGEMENT);
2211 }
2212 #ifndef NEWCC
2213 Status = CcRosUnmapCacheSegment(Bcb, FileOffset, FALSE);
2214 #else
2215 Status = STATUS_SUCCESS;
2216 #endif
2217 if (!NT_SUCCESS(Status))
2218 {
2219 DPRINT1("CCRosUnmapCacheSegment failed, status = %x\n", Status);
2220 KeBugCheck(MEMORY_MANAGEMENT);
2221 }
2222 PageOp->Status = STATUS_SUCCESS;
2223 MmspCompleteAndReleasePageOp(PageOp);
2224 return(STATUS_SUCCESS);
2225 }
2226 else if (!Context.WasDirty && !DirectMapped && !Context.Private)
2227 {
2228 if (SwapEntry != 0)
2229 {
2230 DPRINT1("Found a swap entry for a non dirty, non private and not direct mapped page (address %x)\n",
2231 Address);
2232 KeBugCheck(MEMORY_MANAGEMENT);
2233 }
2234 MmReleasePageMemoryConsumer(MC_USER, Page);
2235 PageOp->Status = STATUS_SUCCESS;
2236 MmspCompleteAndReleasePageOp(PageOp);
2237 return(STATUS_SUCCESS);
2238 }
2239 else if (!Context.WasDirty && Context.Private && SwapEntry != 0)
2240 {
2241 MmSetSavedSwapEntryPage(Page, 0);
2242 MmLockAddressSpace(AddressSpace);
2243 Status = MmCreatePageFileMapping(Process,
2244 Address,
2245 SwapEntry);
2246 MmUnlockAddressSpace(AddressSpace);
2247 if (!NT_SUCCESS(Status))
2248 {
2249 KeBugCheck(MEMORY_MANAGEMENT);
2250 }
2251 MmReleasePageMemoryConsumer(MC_USER, Page);
2252 PageOp->Status = STATUS_SUCCESS;
2253 MmspCompleteAndReleasePageOp(PageOp);
2254 return(STATUS_SUCCESS);
2255 }
2256
2257 /*
2258 * If necessary, allocate an entry in the paging file for this page
2259 */
2260 if (SwapEntry == 0)
2261 {
2262 SwapEntry = MmAllocSwapPage();
2263 if (SwapEntry == 0)
2264 {
2265 MmShowOutOfSpaceMessagePagingFile();
2266 MmLockAddressSpace(AddressSpace);
2267 /*
2268 * For private pages restore the old mappings.
2269 */
2270 if (Context.Private)
2271 {
2272 Status = MmCreateVirtualMapping(Process,
2273 Address,
2274 MemoryArea->Protect,
2275 &Page,
2276 1);
2277 MmSetDirtyPage(Process, Address);
2278 MmInsertRmap(Page,
2279 Process,
2280 Address);
2281 }
2282 else
2283 {
2284 /*
2285 * For non-private pages if the page wasn't direct mapped then
2286 * set it back into the section segment entry so we don't loose
2287 * our copy. Otherwise it will be handled by the cache manager.
2288 */
2289 Status = MmCreateVirtualMapping(Process,
2290 Address,
2291 MemoryArea->Protect,
2292 &Page,
2293 1);
2294 MmSetDirtyPage(Process, Address);
2295 MmInsertRmap(Page,
2296 Process,
2297 Address);
2298 Entry = MAKE_SSE(Page << PAGE_SHIFT, 1);
2299 MmSetPageEntrySectionSegment(Context.Segment, Context.Offset, Entry);
2300 }
2301 MmUnlockAddressSpace(AddressSpace);
2302 PageOp->Status = STATUS_UNSUCCESSFUL;
2303 MmspCompleteAndReleasePageOp(PageOp);
2304 return(STATUS_PAGEFILE_QUOTA);
2305 }
2306 }
2307
2308 /*
2309 * Write the page to the pagefile
2310 */
2311 Status = MmWriteToSwapPage(SwapEntry, Page);
2312 if (!NT_SUCCESS(Status))
2313 {
2314 DPRINT1("MM: Failed to write to swap page (Status was 0x%.8X)\n",
2315 Status);
2316 /*
2317 * As above: undo our actions.
2318 * FIXME: Also free the swap page.
2319 */
2320 MmLockAddressSpace(AddressSpace);
2321 if (Context.Private)
2322 {
2323 Status = MmCreateVirtualMapping(Process,
2324 Address,
2325 MemoryArea->Protect,
2326 &Page,
2327 1);
2328 MmSetDirtyPage(Process, Address);
2329 MmInsertRmap(Page,
2330 Process,
2331 Address);
2332 }
2333 else
2334 {
2335 Status = MmCreateVirtualMapping(Process,
2336 Address,
2337 MemoryArea->Protect,
2338 &Page,
2339 1);
2340 MmSetDirtyPage(Process, Address);
2341 MmInsertRmap(Page,
2342 Process,
2343 Address);
2344 Entry = MAKE_SSE(Page << PAGE_SHIFT, 1);
2345 MmSetPageEntrySectionSegment(Context.Segment, Context.Offset, Entry);
2346 }
2347 MmUnlockAddressSpace(AddressSpace);
2348 PageOp->Status = STATUS_UNSUCCESSFUL;
2349 MmspCompleteAndReleasePageOp(PageOp);
2350 return(STATUS_UNSUCCESSFUL);
2351 }
2352
2353 /*
2354 * Otherwise we have succeeded.
2355 */
2356 DPRINT("MM: Wrote section page 0x%.8X to swap!\n", Page << PAGE_SHIFT);
2357 MmSetSavedSwapEntryPage(Page, 0);
2358 if (Context.Segment->Flags & MM_PAGEFILE_SEGMENT ||
2359 Context.Segment->Characteristics & IMAGE_SCN_MEM_SHARED)
2360 {
2361 MmSetPageEntrySectionSegment(Context.Segment, Context.Offset, MAKE_SWAP_SSE(SwapEntry));
2362 }
2363 else
2364 {
2365 MmReleasePageMemoryConsumer(MC_USER, Page);
2366 }
2367
2368 if (Context.Private)
2369 {
2370 MmLockAddressSpace(AddressSpace);
2371 Status = MmCreatePageFileMapping(Process,
2372 Address,
2373 SwapEntry);
2374 MmUnlockAddressSpace(AddressSpace);
2375 if (!NT_SUCCESS(Status))
2376 {
2377 KeBugCheck(MEMORY_MANAGEMENT);
2378 }
2379 }
2380 else
2381 {
2382 Entry = MAKE_SWAP_SSE(SwapEntry);
2383 MmSetPageEntrySectionSegment(Context.Segment, Context.Offset, Entry);
2384 }
2385
2386 PageOp->Status = STATUS_SUCCESS;
2387 MmspCompleteAndReleasePageOp(PageOp);
2388 return(STATUS_SUCCESS);
2389 }
2390
2391 NTSTATUS
2392 NTAPI
2393 MmWritePageSectionView(PMMSUPPORT AddressSpace,
2394 PMEMORY_AREA MemoryArea,
2395 PVOID Address,
2396 PMM_PAGEOP PageOp)
2397 {
2398 ULONG_PTR Offset;
2399 PROS_SECTION_OBJECT Section;
2400 PMM_SECTION_SEGMENT Segment;
2401 PFN_NUMBER Page;
2402 SWAPENTRY SwapEntry;
2403 ULONG Entry;
2404 BOOLEAN Private;
2405 NTSTATUS Status;
2406 PFILE_OBJECT FileObject;
2407 PBCB Bcb = NULL;
2408 BOOLEAN DirectMapped;
2409 BOOLEAN IsImageSection;
2410 PEPROCESS Process = MmGetAddressSpaceOwner(AddressSpace);
2411
2412 Address = (PVOID)PAGE_ROUND_DOWN(Address);
2413
2414 Offset = (ULONG_PTR)Address - (ULONG_PTR)MemoryArea->StartingAddress
2415 + MemoryArea->Data.SectionData.ViewOffset;
2416
2417 /*
2418 * Get the segment and section.
2419 */
2420 Segment = MemoryArea->Data.SectionData.Segment;
2421 Section = MemoryArea->Data.SectionData.Section;
2422 IsImageSection = Section->AllocationAttributes & SEC_IMAGE ? TRUE : FALSE;
2423
2424 FileObject = Section->FileObject;
2425 DirectMapped = FALSE;
2426 if (FileObject != NULL &&
2427 !(Segment->Characteristics & IMAGE_SCN_MEM_SHARED))
2428 {
2429 Bcb = FileObject->SectionObjectPointer->SharedCacheMap;
2430
2431 /*
2432 * If the file system is letting us go directly to the cache and the
2433 * memory area was mapped at an offset in the file which is page aligned
2434 * then note this is a direct mapped page.
2435 */
2436 if (((Offset + Segment->FileOffset) % PAGE_SIZE) == 0 &&
2437 (Offset + PAGE_SIZE <= Segment->RawLength || !IsImageSection))
2438 {
2439 DirectMapped = TRUE;
2440 }
2441 }
2442
2443 /*
2444 * This should never happen since mappings of physical memory are never
2445 * placed in the rmap lists.
2446 */
2447 if (Section->AllocationAttributes & SEC_PHYSICALMEMORY)
2448 {
2449 DPRINT1("Trying to write back page from physical memory mapped at %X "
2450 "process %d\n", Address,
2451 Process ? Process->UniqueProcessId : 0);
2452 KeBugCheck(MEMORY_MANAGEMENT);
2453 }
2454
2455 /*
2456 * Get the section segment entry and the physical address.
2457 */
2458 Entry = MmGetPageEntrySectionSegment(Segment, Offset);
2459 if (!MmIsPagePresent(Process, Address))
2460 {
2461 DPRINT1("Trying to page out not-present page at (%d,0x%.8X).\n",
2462 Process ? Process->UniqueProcessId : 0, Address);
2463 KeBugCheck(MEMORY_MANAGEMENT);
2464 }
2465 Page = MmGetPfnForProcess(Process, Address);
2466 SwapEntry = MmGetSavedSwapEntryPage(Page);
2467
2468 /*
2469 * Check for a private (COWed) page.
2470 */
2471 if (Segment->Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA ||
2472 IS_SWAP_FROM_SSE(Entry) ||
2473 PFN_FROM_SSE(Entry) != Page)
2474 {
2475 Private = TRUE;
2476 }
2477 else
2478 {
2479 Private = FALSE;
2480 }
2481
2482 /*
2483 * Speculatively set all mappings of the page to clean.
2484 */
2485 MmSetCleanAllRmaps(Page);
2486
2487 /*
2488 * If this page was direct mapped from the cache then the cache manager
2489 * will take care of writing it back to disk.
2490 */
2491 if (DirectMapped && !Private)
2492 {
2493 ASSERT(SwapEntry == 0);
2494 #ifndef NEWCC
2495 CcRosMarkDirtyCacheSegment(Bcb, (ULONG)Offset + Segment->FileOffset);
2496 #endif
2497 PageOp->Status = STATUS_SUCCESS;
2498 MmspCompleteAndReleasePageOp(PageOp);
2499 return(STATUS_SUCCESS);
2500 }
2501
2502 /*
2503 * If necessary, allocate an entry in the paging file for this page
2504 */
2505 if (SwapEntry == 0)
2506 {
2507 SwapEntry = MmAllocSwapPage();
2508 if (SwapEntry == 0)
2509 {
2510 MmSetDirtyAllRmaps(Page);
2511 PageOp->Status = STATUS_UNSUCCESSFUL;
2512 MmspCompleteAndReleasePageOp(PageOp);
2513 return(STATUS_PAGEFILE_QUOTA);
2514 }
2515 MmSetSavedSwapEntryPage(Page, SwapEntry);
2516 }
2517
2518 /*
2519 * Write the page to the pagefile
2520 */
2521 Status = MmWriteToSwapPage(SwapEntry, Page);
2522 if (!NT_SUCCESS(Status))
2523 {
2524 DPRINT1("MM: Failed to write to swap page (Status was 0x%.8X)\n",
2525 Status);
2526 MmSetDirtyAllRmaps(Page);
2527 PageOp->Status = STATUS_UNSUCCESSFUL;
2528 MmspCompleteAndReleasePageOp(PageOp);
2529 return(STATUS_UNSUCCESSFUL);
2530 }
2531
2532 /*
2533 * Otherwise we have succeeded.
2534 */
2535 DPRINT("MM: Wrote section page 0x%.8X to swap!\n", Page << PAGE_SHIFT);
2536 PageOp->Status = STATUS_SUCCESS;
2537 MmspCompleteAndReleasePageOp(PageOp);
2538 return(STATUS_SUCCESS);
2539 }
2540
2541 static VOID
2542 MmAlterViewAttributes(PMMSUPPORT AddressSpace,
2543 PVOID BaseAddress,
2544 SIZE_T RegionSize,
2545 ULONG OldType,
2546 ULONG OldProtect,
2547 ULONG NewType,
2548 ULONG NewProtect)
2549 {
2550 PMEMORY_AREA MemoryArea;
2551 PMM_SECTION_SEGMENT Segment;
2552 BOOLEAN DoCOW = FALSE;
2553 ULONG i;
2554 PEPROCESS Process = MmGetAddressSpaceOwner(AddressSpace);
2555
2556 MemoryArea = MmLocateMemoryAreaByAddress(AddressSpace, BaseAddress);
2557 Segment = MemoryArea->Data.SectionData.Segment;
2558
2559 if ((Segment->WriteCopy) &&
2560 (NewProtect == PAGE_READWRITE || NewProtect == PAGE_EXECUTE_READWRITE))
2561 {
2562 DoCOW = TRUE;
2563 }
2564
2565 if (OldProtect != NewProtect)
2566 {
2567 for (i = 0; i < PAGE_ROUND_UP(RegionSize) / PAGE_SIZE; i++)
2568 {
2569 PVOID Address = (char*)BaseAddress + (i * PAGE_SIZE);
2570 ULONG Protect = NewProtect;
2571
2572 /*
2573 * If we doing COW for this segment then check if the page is
2574 * already private.
2575 */
2576 if (DoCOW && MmIsPagePresent(Process, Address))
2577 {
2578 ULONG_PTR Offset;
2579 ULONG Entry;
2580 PFN_NUMBER Page;
2581
2582 Offset = (ULONG_PTR)Address - (ULONG_PTR)MemoryArea->StartingAddress
2583 + MemoryArea->Data.SectionData.ViewOffset;
2584 Entry = MmGetPageEntrySectionSegment(Segment, Offset);
2585 Page = MmGetPfnForProcess(Process, Address);
2586
2587 Protect = PAGE_READONLY;
2588 if (Segment->Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA ||
2589 IS_SWAP_FROM_SSE(Entry) ||
2590 PFN_FROM_SSE(Entry) != Page)
2591 {
2592 Protect = NewProtect;
2593 }
2594 }
2595
2596 if (MmIsPagePresent(Process, Address))
2597 {
2598 MmSetPageProtect(Process, Address,
2599 Protect);
2600 }
2601 }
2602 }
2603 }
2604
2605 NTSTATUS
2606 NTAPI
2607 MmProtectSectionView(PMMSUPPORT AddressSpace,
2608 PMEMORY_AREA MemoryArea,
2609 PVOID BaseAddress,
2610 SIZE_T Length,
2611 ULONG Protect,
2612 PULONG OldProtect)
2613 {
2614 PMM_REGION Region;
2615 NTSTATUS Status;
2616 ULONG_PTR MaxLength;
2617
2618 MaxLength = (ULONG_PTR)MemoryArea->EndingAddress - (ULONG_PTR)BaseAddress;
2619 if (Length > MaxLength)
2620 Length = (ULONG)MaxLength;
2621
2622 Region = MmFindRegion(MemoryArea->StartingAddress,
2623 &MemoryArea->Data.SectionData.RegionListHead,
2624 BaseAddress, NULL);
2625 if ((MemoryArea->Flags & SEC_NO_CHANGE) &&
2626 Region->Protect != Protect)
2627 {
2628 return STATUS_INVALID_PAGE_PROTECTION;
2629 }
2630
2631 *OldProtect = Region->Protect;
2632 Status = MmAlterRegion(AddressSpace, MemoryArea->StartingAddress,
2633 &MemoryArea->Data.SectionData.RegionListHead,
2634 BaseAddress, Length, Region->Type, Protect,
2635 MmAlterViewAttributes);
2636
2637 return(Status);
2638 }
2639
2640 NTSTATUS NTAPI
2641 MmQuerySectionView(PMEMORY_AREA MemoryArea,
2642 PVOID Address,
2643 PMEMORY_BASIC_INFORMATION Info,
2644 PSIZE_T ResultLength)
2645 {
2646 PMM_REGION Region;
2647 PVOID RegionBaseAddress;
2648 PROS_SECTION_OBJECT Section;
2649 PMM_SECTION_SEGMENT Segment;
2650
2651 Region = MmFindRegion((PVOID)MemoryArea->StartingAddress,
2652 &MemoryArea->Data.SectionData.RegionListHead,
2653 Address, &RegionBaseAddress);
2654 if (Region == NULL)
2655 {
2656 return STATUS_UNSUCCESSFUL;
2657 }
2658
2659 Section = MemoryArea->Data.SectionData.Section;
2660 if (Section->AllocationAttributes & SEC_IMAGE)
2661 {
2662 Segment = MemoryArea->Data.SectionData.Segment;
2663 Info->AllocationBase = (PUCHAR)MemoryArea->StartingAddress - Segment->VirtualAddress;
2664 Info->Type = MEM_IMAGE;
2665 }
2666 else
2667 {
2668 Info->AllocationBase = MemoryArea->StartingAddress;
2669 Info->Type = MEM_MAPPED;
2670 }
2671 Info->BaseAddress = RegionBaseAddress;
2672 Info->AllocationProtect = MemoryArea->Protect;
2673 Info->RegionSize = Region->Length;
2674 Info->State = MEM_COMMIT;
2675 Info->Protect = Region->Protect;
2676
2677 *ResultLength = sizeof(MEMORY_BASIC_INFORMATION);
2678 return(STATUS_SUCCESS);
2679 }
2680
2681 VOID
2682 NTAPI
2683 MmpFreePageFileSegment(PMM_SECTION_SEGMENT Segment)
2684 {
2685 ULONG Length;
2686 ULONG Offset;
2687 ULONG Entry;
2688 SWAPENTRY SavedSwapEntry;
2689 PFN_NUMBER Page;
2690
2691 Page = 0;
2692
2693 Length = PAGE_ROUND_UP(Segment->Length);
2694 for (Offset = 0; Offset < Length; Offset += PAGE_SIZE)
2695 {
2696 Entry = MmGetPageEntrySectionSegment(Segment, Offset);
2697 if (Entry)
2698 {
2699 if (IS_SWAP_FROM_SSE(Entry))
2700 {
2701 MmFreeSwapPage(SWAPENTRY_FROM_SSE(Entry));
2702 }
2703 else
2704 {
2705 Page = PFN_FROM_SSE(Entry);
2706 SavedSwapEntry = MmGetSavedSwapEntryPage(Page);
2707 if (SavedSwapEntry != 0)
2708 {
2709 MmSetSavedSwapEntryPage(Page, 0);
2710 MmFreeSwapPage(SavedSwapEntry);
2711 }
2712 MmReleasePageMemoryConsumer(MC_USER, Page);
2713 }
2714 MmSetPageEntrySectionSegment(Segment, Offset, 0);
2715 }
2716 }
2717 }
2718
2719 VOID NTAPI
2720 MmpDeleteSection(PVOID ObjectBody)
2721 {
2722 PROS_SECTION_OBJECT Section = (PROS_SECTION_OBJECT)ObjectBody;
2723
2724 DPRINT("MmpDeleteSection(ObjectBody %x)\n", ObjectBody);
2725 if (Section->AllocationAttributes & SEC_IMAGE)
2726 {
2727 ULONG i;
2728 ULONG NrSegments;
2729 ULONG RefCount;
2730 PMM_SECTION_SEGMENT SectionSegments;
2731
2732 /*
2733 * NOTE: Section->ImageSection can be NULL for short time
2734 * during the section creating. If we fail for some reason
2735 * until the image section is properly initialized we shouldn't
2736 * process further here.
2737 */
2738 if (Section->ImageSection == NULL)
2739 return;
2740
2741 SectionSegments = Section->ImageSection->Segments;
2742 NrSegments = Section->ImageSection->NrSegments;
2743
2744 for (i = 0; i < NrSegments; i++)
2745 {
2746 if (SectionSegments[i].Characteristics & IMAGE_SCN_MEM_SHARED)
2747 {
2748 MmLockSectionSegment(&SectionSegments[i]);
2749 }
2750 RefCount = InterlockedDecrementUL(&SectionSegments[i].ReferenceCount);
2751 if (SectionSegments[i].Characteristics & IMAGE_SCN_MEM_SHARED)
2752 {
2753 if (RefCount == 0)
2754 {
2755 MmpFreePageFileSegment(&SectionSegments[i]);
2756 }
2757 MmUnlockSectionSegment(&SectionSegments[i]);
2758 }
2759 }
2760 }
2761 else
2762 {
2763 /*
2764 * NOTE: Section->Segment can be NULL for short time
2765 * during the section creating.
2766 */
2767 if (Section->Segment == NULL)
2768 return;
2769
2770 if (Section->Segment->Flags & MM_PAGEFILE_SEGMENT)
2771 {
2772 MmpFreePageFileSegment(Section->Segment);
2773 MmFreePageTablesSectionSegment(Section->Segment);
2774 ExFreePool(Section->Segment);
2775 Section->Segment = NULL;
2776 }
2777 else
2778 {
2779 (void)InterlockedDecrementUL(&Section->Segment->ReferenceCount);
2780 }
2781 }
2782 if (Section->FileObject != NULL)
2783 {
2784 #ifndef NEWCC
2785 CcRosDereferenceCache(Section->FileObject);
2786 #endif
2787 ObDereferenceObject(Section->FileObject);
2788 Section->FileObject = NULL;
2789 }
2790 }
2791
2792 VOID NTAPI
2793 MmpCloseSection(IN PEPROCESS Process OPTIONAL,
2794 IN PVOID Object,
2795 IN ACCESS_MASK GrantedAccess,
2796 IN ULONG ProcessHandleCount,
2797 IN ULONG SystemHandleCount)
2798 {
2799 DPRINT("MmpCloseSection(OB %x, HC %d)\n",
2800 Object, ProcessHandleCount);
2801 }
2802
2803 NTSTATUS
2804 INIT_FUNCTION
2805 NTAPI
2806 MmCreatePhysicalMemorySection(VOID)
2807 {
2808 PROS_SECTION_OBJECT PhysSection;
2809 NTSTATUS Status;
2810 OBJECT_ATTRIBUTES Obj;
2811 UNICODE_STRING Name = RTL_CONSTANT_STRING(L"\\Device\\PhysicalMemory");
2812 LARGE_INTEGER SectionSize;
2813 HANDLE Handle;
2814
2815 /*
2816 * Create the section mapping physical memory
2817 */
2818 SectionSize.QuadPart = 0xFFFFFFFF;
2819 InitializeObjectAttributes(&Obj,
2820 &Name,
2821 OBJ_PERMANENT,
2822 NULL,
2823 NULL);
2824 Status = MmCreateSection((PVOID)&PhysSection,
2825 SECTION_ALL_ACCESS,
2826 &Obj,
2827 &SectionSize,
2828 PAGE_EXECUTE_READWRITE,
2829 0,
2830 NULL,
2831 NULL);
2832 if (!NT_SUCCESS(Status))
2833 {
2834 DPRINT1("Failed to create PhysicalMemory section\n");
2835 KeBugCheck(MEMORY_MANAGEMENT);
2836 }
2837 Status = ObInsertObject(PhysSection,
2838 NULL,
2839 SECTION_ALL_ACCESS,
2840 0,
2841 NULL,
2842 &Handle);
2843 if (!NT_SUCCESS(Status))
2844 {
2845 ObDereferenceObject(PhysSection);
2846 }
2847 ObCloseHandle(Handle, KernelMode);
2848 PhysSection->AllocationAttributes |= SEC_PHYSICALMEMORY;
2849 PhysSection->Segment->Flags &= ~MM_PAGEFILE_SEGMENT;
2850
2851 return(STATUS_SUCCESS);
2852 }
2853
2854 NTSTATUS
2855 INIT_FUNCTION
2856 NTAPI
2857 MmInitSectionImplementation(VOID)
2858 {
2859 OBJECT_TYPE_INITIALIZER ObjectTypeInitializer;
2860 UNICODE_STRING Name;
2861
2862 DPRINT("Creating Section Object Type\n");
2863
2864 /* Initialize the Section object type */
2865 RtlZeroMemory(&ObjectTypeInitializer, sizeof(ObjectTypeInitializer));
2866 RtlInitUnicodeString(&Name, L"Section");
2867 ObjectTypeInitializer.Length = sizeof(ObjectTypeInitializer);
2868 ObjectTypeInitializer.DefaultPagedPoolCharge = sizeof(ROS_SECTION_OBJECT);
2869 ObjectTypeInitializer.PoolType = PagedPool;
2870 ObjectTypeInitializer.UseDefaultObject = TRUE;
2871 ObjectTypeInitializer.GenericMapping = MmpSectionMapping;
2872 ObjectTypeInitializer.DeleteProcedure = MmpDeleteSection;
2873 ObjectTypeInitializer.CloseProcedure = MmpCloseSection;
2874 ObjectTypeInitializer.ValidAccessMask = SECTION_ALL_ACCESS;
2875 ObCreateObjectType(&Name, &ObjectTypeInitializer, NULL, &MmSectionObjectType);
2876
2877 MmCreatePhysicalMemorySection();
2878
2879 return(STATUS_SUCCESS);
2880 }
2881
2882 NTSTATUS
2883 NTAPI
2884 MmCreatePageFileSection(PROS_SECTION_OBJECT *SectionObject,
2885 ACCESS_MASK DesiredAccess,
2886 POBJECT_ATTRIBUTES ObjectAttributes,
2887 PLARGE_INTEGER UMaximumSize,
2888 ULONG SectionPageProtection,
2889 ULONG AllocationAttributes)
2890 /*
2891 * Create a section which is backed by the pagefile
2892 */
2893 {
2894 LARGE_INTEGER MaximumSize;
2895 PROS_SECTION_OBJECT Section;
2896 PMM_SECTION_SEGMENT Segment;
2897 NTSTATUS Status;
2898
2899 if (UMaximumSize == NULL)
2900 {
2901 return(STATUS_UNSUCCESSFUL);
2902 }
2903 MaximumSize = *UMaximumSize;
2904
2905 /*
2906 * Create the section
2907 */
2908 Status = ObCreateObject(ExGetPreviousMode(),
2909 MmSectionObjectType,
2910 ObjectAttributes,
2911 ExGetPreviousMode(),
2912 NULL,
2913 sizeof(ROS_SECTION_OBJECT),
2914 0,
2915 0,
2916 (PVOID*)(PVOID)&Section);
2917 if (!NT_SUCCESS(Status))
2918 {
2919 return(Status);
2920 }
2921
2922 /*
2923 * Initialize it
2924 */
2925 RtlZeroMemory(Section, sizeof(ROS_SECTION_OBJECT));
2926 Section->SectionPageProtection = SectionPageProtection;
2927 Section->AllocationAttributes = AllocationAttributes;
2928 Section->MaximumSize = MaximumSize;
2929 Segment = ExAllocatePoolWithTag(NonPagedPool, sizeof(MM_SECTION_SEGMENT),
2930 TAG_MM_SECTION_SEGMENT);
2931 if (Segment == NULL)
2932 {
2933 ObDereferenceObject(Section);
2934 return(STATUS_NO_MEMORY);
2935 }
2936 Section->Segment = Segment;
2937 Segment->ReferenceCount = 1;
2938 ExInitializeFastMutex(&Segment->Lock);
2939 Segment->FileOffset = 0;
2940 Segment->Protection = SectionPageProtection;
2941 Segment->RawLength = MaximumSize.u.LowPart;
2942 Segment->Length = PAGE_ROUND_UP(MaximumSize.u.LowPart);
2943 Segment->Flags = MM_PAGEFILE_SEGMENT;
2944 Segment->WriteCopy = FALSE;
2945 RtlZeroMemory(&Segment->PageDirectory, sizeof(SECTION_PAGE_DIRECTORY));
2946 Segment->VirtualAddress = 0;
2947 Segment->Characteristics = 0;
2948 *SectionObject = Section;
2949 return(STATUS_SUCCESS);
2950 }
2951
2952
2953 NTSTATUS
2954 NTAPI
2955 MmCreateDataFileSection(PROS_SECTION_OBJECT *SectionObject,
2956 ACCESS_MASK DesiredAccess,
2957 POBJECT_ATTRIBUTES ObjectAttributes,
2958 PLARGE_INTEGER UMaximumSize,
2959 ULONG SectionPageProtection,
2960 ULONG AllocationAttributes,
2961 HANDLE FileHandle)
2962 /*
2963 * Create a section backed by a data file
2964 */
2965 {
2966 PROS_SECTION_OBJECT Section;
2967 NTSTATUS Status;
2968 LARGE_INTEGER MaximumSize;
2969 PFILE_OBJECT FileObject;
2970 PMM_SECTION_SEGMENT Segment;
2971 ULONG FileAccess;
2972 IO_STATUS_BLOCK Iosb;
2973 LARGE_INTEGER Offset;
2974 CHAR Buffer;
2975 FILE_STANDARD_INFORMATION FileInfo;
2976 ULONG Length;
2977
2978 /*
2979 * Create the section
2980 */
2981 Status = ObCreateObject(ExGetPreviousMode(),
2982 MmSectionObjectType,
2983 ObjectAttributes,
2984 ExGetPreviousMode(),
2985 NULL,
2986 sizeof(ROS_SECTION_OBJECT),
2987 0,
2988 0,
2989 (PVOID*)(PVOID)&Section);
2990 if (!NT_SUCCESS(Status))
2991 {
2992 return(Status);
2993 }
2994 /*
2995 * Initialize it
2996 */
2997 RtlZeroMemory(Section, sizeof(ROS_SECTION_OBJECT));
2998 Section->SectionPageProtection = SectionPageProtection;
2999 Section->AllocationAttributes = AllocationAttributes;
3000
3001 /*
3002 * Check file access required
3003 */
3004 if (SectionPageProtection & PAGE_READWRITE ||
3005 SectionPageProtection & PAGE_EXECUTE_READWRITE)
3006 {
3007 FileAccess = FILE_READ_DATA | FILE_WRITE_DATA;
3008 }
3009 else
3010 {
3011 FileAccess = FILE_READ_DATA;
3012 }
3013
3014 /*
3015 * Reference the file handle
3016 */
3017 Status = ObReferenceObjectByHandle(FileHandle,
3018 FileAccess,
3019 IoFileObjectType,
3020 ExGetPreviousMode(),
3021 (PVOID*)(PVOID)&FileObject,
3022 NULL);
3023 if (!NT_SUCCESS(Status))
3024 {
3025 ObDereferenceObject(Section);
3026 return(Status);
3027 }
3028
3029 /*
3030 * FIXME: This is propably not entirely correct. We can't look into
3031 * the standard FCB header because it might not be initialized yet
3032 * (as in case of the EXT2FS driver by Manoj Paul Joseph where the
3033 * standard file information is filled on first request).
3034 */
3035 Status = IoQueryFileInformation(FileObject,
3036 FileStandardInformation,
3037 sizeof(FILE_STANDARD_INFORMATION),
3038 &FileInfo,
3039 &Length);
3040 Iosb.Information = Length;
3041 if (!NT_SUCCESS(Status))
3042 {
3043 ObDereferenceObject(Section);
3044 ObDereferenceObject(FileObject);
3045 return Status;
3046 }
3047
3048 /*
3049 * FIXME: Revise this once a locking order for file size changes is
3050 * decided
3051 */
3052 if ((UMaximumSize != NULL) && (UMaximumSize->QuadPart != 0))
3053 {
3054 MaximumSize = *UMaximumSize;
3055 }
3056 else
3057 {
3058 MaximumSize = FileInfo.EndOfFile;
3059 /* Mapping zero-sized files isn't allowed. */
3060 if (MaximumSize.QuadPart == 0)
3061 {
3062 ObDereferenceObject(Section);
3063 ObDereferenceObject(FileObject);
3064 return STATUS_FILE_INVALID;
3065 }
3066 }
3067
3068 if (MaximumSize.QuadPart > FileInfo.EndOfFile.QuadPart)
3069 {
3070 Status = IoSetInformation(FileObject,
3071 FileAllocationInformation,
3072 sizeof(LARGE_INTEGER),
3073 &MaximumSize);
3074 if (!NT_SUCCESS(Status))
3075 {
3076 ObDereferenceObject(Section);
3077 ObDereferenceObject(FileObject);
3078 return(STATUS_SECTION_NOT_EXTENDED);
3079 }
3080 }
3081
3082 if (FileObject->SectionObjectPointer == NULL ||
3083 FileObject->SectionObjectPointer->SharedCacheMap == NULL)
3084 {
3085 /*
3086 * Read a bit so caching is initiated for the file object.
3087 * This is only needed because MiReadPage currently cannot
3088 * handle non-cached streams.
3089 */
3090 Offset.QuadPart = 0;
3091 Status = ZwReadFile(FileHandle,
3092 NULL,
3093 NULL,
3094 NULL,
3095 &Iosb,
3096 &Buffer,
3097 sizeof (Buffer),
3098 &Offset,
3099 0);
3100 if (!NT_SUCCESS(Status) && (Status != STATUS_END_OF_FILE))
3101 {
3102 ObDereferenceObject(Section);
3103 ObDereferenceObject(FileObject);
3104 return(Status);
3105 }
3106 if (FileObject->SectionObjectPointer == NULL ||
3107 FileObject->SectionObjectPointer->SharedCacheMap == NULL)
3108 {
3109 /* FIXME: handle this situation */
3110 ObDereferenceObject(Section);
3111 ObDereferenceObject(FileObject);
3112 return STATUS_INVALID_PARAMETER;
3113 }
3114 }
3115
3116 /*
3117 * Lock the file
3118 */
3119 Status = MmspWaitForFileLock(FileObject);
3120 if (Status != STATUS_SUCCESS)
3121 {
3122 ObDereferenceObject(Section);
3123 ObDereferenceObject(FileObject);
3124 return(Status);
3125 }
3126
3127 /*
3128 * If this file hasn't been mapped as a data file before then allocate a
3129 * section segment to describe the data file mapping
3130 */
3131 if (FileObject->SectionObjectPointer->DataSectionObject == NULL)
3132 {
3133 Segment = ExAllocatePoolWithTag(NonPagedPool, sizeof(MM_SECTION_SEGMENT),
3134 TAG_MM_SECTION_SEGMENT);
3135 if (Segment == NULL)
3136 {
3137 //KeSetEvent((PVOID)&FileObject->Lock, IO_NO_INCREMENT, FALSE);
3138 ObDereferenceObject(Section);
3139 ObDereferenceObject(FileObject);
3140 return(STATUS_NO_MEMORY);
3141 }
3142 Section->Segment = Segment;
3143 Segment->ReferenceCount = 1;
3144 ExInitializeFastMutex(&Segment->Lock);
3145 /*
3146 * Set the lock before assigning the segment to the file object
3147 */
3148 ExAcquireFastMutex(&Segment->Lock);
3149 FileObject->SectionObjectPointer->DataSectionObject = (PVOID)Segment;
3150
3151 Segment->FileOffset = 0;
3152 Segment->Protection = SectionPageProtection;
3153 Segment->Flags = MM_DATAFILE_SEGMENT;
3154 Segment->Characteristics = 0;
3155 Segment->WriteCopy = FALSE;
3156 if (AllocationAttributes & SEC_RESERVE)
3157 {
3158 Segment->Length = Segment->RawLength = 0;
3159 }
3160 else
3161 {
3162 Segment->RawLength = MaximumSize.u.LowPart;
3163 Segment->Length = PAGE_ROUND_UP(Segment->RawLength);
3164 }
3165 Segment->VirtualAddress = 0;
3166 RtlZeroMemory(&Segment->PageDirectory, sizeof(SECTION_PAGE_DIRECTORY));
3167 }
3168 else
3169 {
3170 /*
3171 * If the file is already mapped as a data file then we may need
3172 * to extend it
3173 */
3174 Segment =
3175 (PMM_SECTION_SEGMENT)FileObject->SectionObjectPointer->
3176 DataSectionObject;
3177 Section->Segment = Segment;
3178 (void)InterlockedIncrementUL(&Segment->ReferenceCount);
3179 MmLockSectionSegment(Segment);
3180
3181 if (MaximumSize.u.LowPart > Segment->RawLength &&
3182 !(AllocationAttributes & SEC_RESERVE))
3183 {
3184 Segment->RawLength = MaximumSize.u.LowPart;
3185 Segment->Length = PAGE_ROUND_UP(Segment->RawLength);
3186 }
3187 }
3188 MmUnlockSectionSegment(Segment);
3189 Section->FileObject = FileObject;
3190 Section->MaximumSize = MaximumSize;
3191 #ifndef NEWCC
3192 CcRosReferenceCache(FileObject);
3193 #endif
3194 //KeSetEvent((PVOID)&FileObject->Lock, IO_NO_INCREMENT, FALSE);
3195 *SectionObject = Section;
3196 return(STATUS_SUCCESS);
3197 }
3198
3199 /*
3200 TODO: not that great (declaring loaders statically, having to declare all of
3201 them, having to keep them extern, etc.), will fix in the future
3202 */
3203 extern NTSTATUS NTAPI PeFmtCreateSection
3204 (
3205 IN CONST VOID * FileHeader,
3206 IN SIZE_T FileHeaderSize,
3207 IN PVOID File,
3208 OUT PMM_IMAGE_SECTION_OBJECT ImageSectionObject,
3209 OUT PULONG Flags,
3210 IN PEXEFMT_CB_READ_FILE ReadFileCb,
3211 IN PEXEFMT_CB_ALLOCATE_SEGMENTS AllocateSegmentsCb
3212 );
3213
3214 extern NTSTATUS NTAPI ElfFmtCreateSection
3215 (
3216 IN CONST VOID * FileHeader,
3217 IN SIZE_T FileHeaderSize,
3218 IN PVOID File,
3219 OUT PMM_IMAGE_SECTION_OBJECT ImageSectionObject,
3220 OUT PULONG Flags,
3221 IN PEXEFMT_CB_READ_FILE ReadFileCb,
3222 IN PEXEFMT_CB_ALLOCATE_SEGMENTS AllocateSegmentsCb
3223 );
3224
3225 /* TODO: this is a standard DDK/PSDK macro */
3226 #ifndef RTL_NUMBER_OF
3227 #define RTL_NUMBER_OF(ARR_) (sizeof(ARR_) / sizeof((ARR_)[0]))
3228 #endif
3229
3230 static PEXEFMT_LOADER ExeFmtpLoaders[] =
3231 {
3232 PeFmtCreateSection,
3233 #ifdef __ELF
3234 ElfFmtCreateSection
3235 #endif
3236 };
3237
3238 static
3239 PMM_SECTION_SEGMENT
3240 NTAPI
3241 ExeFmtpAllocateSegments(IN ULONG NrSegments)
3242 {
3243 SIZE_T SizeOfSegments;
3244 PMM_SECTION_SEGMENT Segments;
3245
3246 /* TODO: check for integer overflow */
3247 SizeOfSegments = sizeof(MM_SECTION_SEGMENT) * NrSegments;
3248
3249 Segments = ExAllocatePoolWithTag(NonPagedPool,
3250 SizeOfSegments,
3251 TAG_MM_SECTION_SEGMENT);
3252
3253 if(Segments)
3254 RtlZeroMemory(Segments, SizeOfSegments);
3255
3256 return Segments;
3257 }
3258
3259 static
3260 NTSTATUS
3261 NTAPI
3262 ExeFmtpReadFile(IN PVOID File,
3263 IN PLARGE_INTEGER Offset,
3264 IN ULONG Length,
3265 OUT PVOID * Data,
3266 OUT PVOID * AllocBase,
3267 OUT PULONG ReadSize)
3268 {
3269 NTSTATUS Status;
3270 LARGE_INTEGER FileOffset;
3271 ULONG AdjustOffset;
3272 ULONG OffsetAdjustment;
3273 ULONG BufferSize;
3274 ULONG UsedSize;
3275 PVOID Buffer;
3276
3277 ASSERT_IRQL_LESS(DISPATCH_LEVEL);
3278
3279 if(Length == 0)
3280 {
3281 KeBugCheck(MEMORY_MANAGEMENT);
3282 }
3283
3284 FileOffset = *Offset;
3285
3286 /* Negative/special offset: it cannot be used in this context */
3287 if(FileOffset.u.HighPart < 0)
3288 {
3289 KeBugCheck(MEMORY_MANAGEMENT);
3290 }
3291
3292 AdjustOffset = PAGE_ROUND_DOWN(FileOffset.u.LowPart);
3293 OffsetAdjustment = FileOffset.u.LowPart - AdjustOffset;
3294 FileOffset.u.LowPart = AdjustOffset;
3295
3296 BufferSize = Length + OffsetAdjustment;
3297 BufferSize = PAGE_ROUND_UP(BufferSize);
3298
3299 /*
3300 * It's ok to use paged pool, because this is a temporary buffer only used in
3301 * the loading of executables. The assumption is that MmCreateSection is
3302 * always called at low IRQLs and that these buffers don't survive a brief
3303 * initialization phase
3304 */
3305 Buffer = ExAllocatePoolWithTag(PagedPool,
3306 BufferSize,
3307 'rXmM');
3308 if (!Buffer)
3309 {
3310 KeBugCheck(MEMORY_MANAGEMENT);
3311 }
3312
3313 UsedSize = 0;
3314
3315 #if 0
3316 Status = MmspPageRead(File,
3317 Buffer,
3318 BufferSize,
3319 &FileOffset,
3320 &UsedSize);
3321 #else
3322 /*
3323 * FIXME: if we don't use ZwReadFile, caching is not enabled for the file and
3324 * nothing will work. But using ZwReadFile is wrong, and using its side effects
3325 * to initialize internal state is even worse. Our cache manager is in need of
3326 * professional help
3327 */
3328 {
3329 IO_STATUS_BLOCK Iosb;
3330
3331 Status = ZwReadFile(File,
3332 NULL,
3333 NULL,
3334 NULL,
3335 &Iosb,
3336 Buffer,
3337 BufferSize,
3338 &FileOffset,
3339 NULL);
3340
3341 if(NT_SUCCESS(Status))
3342 {
3343 UsedSize = (ULONG)Iosb.Information;
3344 }
3345 }
3346 #endif
3347
3348 if(NT_SUCCESS(Status) && UsedSize < OffsetAdjustment)
3349 {
3350 Status = STATUS_IN_PAGE_ERROR;
3351 ASSERT(!NT_SUCCESS(Status));
3352 }
3353
3354 if(NT_SUCCESS(Status))
3355 {
3356 *Data = (PVOID)((ULONG_PTR)Buffer + OffsetAdjustment);
3357 *AllocBase = Buffer;
3358 *ReadSize = UsedSize - OffsetAdjustment;
3359 }
3360 else
3361 {
3362 ExFreePoolWithTag(Buffer, 'rXmM');
3363 }
3364
3365 return Status;
3366 }
3367
3368 #ifdef NASSERT
3369 # define MmspAssertSegmentsSorted(OBJ_) ((void)0)
3370 # define MmspAssertSegmentsNoOverlap(OBJ_) ((void)0)
3371 # define MmspAssertSegmentsPageAligned(OBJ_) ((void)0)
3372 #else
3373 static
3374 VOID
3375 NTAPI
3376 MmspAssertSegmentsSorted(IN PMM_IMAGE_SECTION_OBJECT ImageSectionObject)
3377 {
3378 ULONG i;
3379
3380 for( i = 1; i < ImageSectionObject->NrSegments; ++ i )
3381 {
3382 ASSERT(ImageSectionObject->Segments[i].VirtualAddress >=
3383 ImageSectionObject->Segments[i - 1].VirtualAddress);
3384 }
3385 }
3386
3387 static
3388 VOID
3389 NTAPI
3390 MmspAssertSegmentsNoOverlap(IN PMM_IMAGE_SECTION_OBJECT ImageSectionObject)
3391 {
3392 ULONG i;
3393
3394 MmspAssertSegmentsSorted(ImageSectionObject);
3395
3396 for( i = 0; i < ImageSectionObject->NrSegments; ++ i )
3397 {
3398 ASSERT(ImageSectionObject->Segments[i].Length > 0);
3399
3400 if(i > 0)
3401 {
3402 ASSERT(ImageSectionObject->Segments[i].VirtualAddress >=
3403 (ImageSectionObject->Segments[i - 1].VirtualAddress +
3404 ImageSectionObject->Segments[i - 1].Length));
3405 }
3406 }
3407 }
3408
3409 static
3410 VOID
3411 NTAPI
3412 MmspAssertSegmentsPageAligned(IN PMM_IMAGE_SECTION_OBJECT ImageSectionObject)
3413 {
3414 ULONG i;
3415
3416 for( i = 0; i < ImageSectionObject->NrSegments; ++ i )
3417 {
3418 ASSERT((ImageSectionObject->Segments[i].VirtualAddress % PAGE_SIZE) == 0);
3419 ASSERT((ImageSectionObject->Segments[i].Length % PAGE_SIZE) == 0);
3420 }
3421 }
3422 #endif
3423
3424 static
3425 int
3426 __cdecl
3427 MmspCompareSegments(const void * x,
3428 const void * y)
3429 {
3430 const MM_SECTION_SEGMENT *Segment1 = (const MM_SECTION_SEGMENT *)x;
3431 const MM_SECTION_SEGMENT *Segment2 = (const MM_SECTION_SEGMENT *)y;
3432
3433 return
3434 (Segment1->VirtualAddress - Segment2->VirtualAddress) >>
3435 ((sizeof(ULONG_PTR) - sizeof(int)) * 8);
3436 }
3437
3438 /*
3439 * Ensures an image section's segments are sorted in memory
3440 */
3441 static
3442 VOID
3443 NTAPI
3444 MmspSortSegments(IN OUT PMM_IMAGE_SECTION_OBJECT ImageSectionObject,
3445 IN ULONG Flags)
3446 {
3447 if (Flags & EXEFMT_LOAD_ASSUME_SEGMENTS_SORTED)
3448 {
3449 MmspAssertSegmentsSorted(ImageSectionObject);
3450 }
3451 else
3452 {
3453 qsort(ImageSectionObject->Segments,
3454 ImageSectionObject->NrSegments,
3455 sizeof(ImageSectionObject->Segments[0]),
3456 MmspCompareSegments);
3457 }
3458 }
3459
3460
3461 /*
3462 * Ensures an image section's segments don't overlap in memory and don't have
3463 * gaps and don't have a null size. We let them map to overlapping file regions,
3464 * though - that's not necessarily an error
3465 */
3466 static
3467 BOOLEAN
3468 NTAPI
3469 MmspCheckSegmentBounds
3470 (
3471 IN OUT PMM_IMAGE_SECTION_OBJECT ImageSectionObject,
3472 IN ULONG Flags
3473 )
3474 {
3475 ULONG i;
3476
3477 if (Flags & EXEFMT_LOAD_ASSUME_SEGMENTS_NO_OVERLAP)
3478 {
3479 MmspAssertSegmentsNoOverlap(ImageSectionObject);
3480 return TRUE;
3481 }
3482
3483 ASSERT(ImageSectionObject->NrSegments >= 1);
3484
3485 for ( i = 0; i < ImageSectionObject->NrSegments; ++ i )
3486 {
3487 if(ImageSectionObject->Segments[i].Length == 0)
3488 {
3489 return FALSE;
3490 }
3491
3492 if(i > 0)
3493 {
3494 /*
3495 * TODO: relax the limitation on gaps. For example, gaps smaller than a
3496 * page could be OK (Windows seems to be OK with them), and larger gaps
3497 * could lead to image sections spanning several discontiguous regions
3498 * (NtMapViewOfSection could then refuse to map them, and they could
3499 * e.g. only be allowed as parameters to NtCreateProcess, like on UNIX)
3500 */
3501 if ((ImageSectionObject->Segments[i - 1].VirtualAddress +
3502 ImageSectionObject->Segments[i - 1].Length) !=
3503 ImageSectionObject->Segments[i].VirtualAddress)
3504 {
3505 return FALSE;
3506 }
3507 }
3508 }
3509
3510 return TRUE;
3511 }
3512
3513 /*
3514 * Merges and pads an image section's segments until they all are page-aligned
3515 * and have a size that is a multiple of the page size
3516 */
3517 static
3518 BOOLEAN
3519 NTAPI
3520 MmspPageAlignSegments
3521 (
3522 IN OUT PMM_IMAGE_SECTION_OBJECT ImageSectionObject,
3523 IN ULONG Flags
3524 )
3525 {
3526 ULONG i;
3527 ULONG LastSegment;
3528 PMM_SECTION_SEGMENT EffectiveSegment;
3529
3530 if (Flags & EXEFMT_LOAD_ASSUME_SEGMENTS_PAGE_ALIGNED)
3531 {
3532 MmspAssertSegmentsPageAligned(ImageSectionObject);
3533 return TRUE;
3534 }
3535
3536 LastSegment = 0;
3537 EffectiveSegment = &ImageSectionObject->Segments[LastSegment];
3538
3539 for ( i = 0; i < ImageSectionObject->NrSegments; ++ i )
3540 {
3541 /*
3542 * The first segment requires special handling
3543 */
3544 if (i == 0)
3545 {
3546 ULONG_PTR VirtualAddress;
3547 ULONG_PTR VirtualOffset;
3548
3549 VirtualAddress = EffectiveSegment->VirtualAddress;
3550
3551 /* Round down the virtual address to the nearest page */
3552 EffectiveSegment->VirtualAddress = PAGE_ROUND_DOWN(VirtualAddress);
3553
3554 /* Round up the virtual size to the nearest page */
3555 EffectiveSegment->Length = (ULONG)(PAGE_ROUND_UP(VirtualAddress + EffectiveSegment->Length) -
3556 EffectiveSegment->VirtualAddress);
3557
3558 /* Adjust the raw address and size */
3559 VirtualOffset = VirtualAddress - EffectiveSegment->VirtualAddress;
3560
3561 if (EffectiveSegment->FileOffset < (LONG_PTR)VirtualOffset)
3562 {
3563 return FALSE;
3564 }
3565
3566 /*
3567 * Garbage in, garbage out: unaligned base addresses make the file
3568 * offset point in curious and odd places, but that's what we were
3569 * asked for
3570 */
3571 EffectiveSegment->FileOffset -= (ULONG)VirtualOffset;
3572 EffectiveSegment->RawLength += (ULONG)VirtualOffset;
3573 }
3574 else
3575 {
3576 PMM_SECTION_SEGMENT Segment = &ImageSectionObject->Segments[i];
3577 ULONG_PTR EndOfEffectiveSegment;
3578
3579 EndOfEffectiveSegment = EffectiveSegment->VirtualAddress + EffectiveSegment->Length;
3580 ASSERT((EndOfEffectiveSegment % PAGE_SIZE) == 0);
3581
3582 /*
3583 * The current segment begins exactly where the current effective
3584 * segment ended, therefore beginning a new effective segment
3585 */
3586 if (EndOfEffectiveSegment == Segment->VirtualAddress)
3587 {
3588 LastSegment ++;
3589 ASSERT(LastSegment <= i);
3590 ASSERT(LastSegment < ImageSectionObject->NrSegments);
3591
3592 EffectiveSegment = &ImageSectionObject->Segments[LastSegment];
3593
3594 if (LastSegment != i)
3595 {
3596 /*
3597 * Copy the current segment. If necessary, the effective segment
3598 * will be expanded later
3599 */
3600 *EffectiveSegment = *Segment;
3601 }
3602
3603 /*
3604 * Page-align the virtual size. We know for sure the virtual address
3605 * already is
3606 */
3607 ASSERT((EffectiveSegment->VirtualAddress % PAGE_SIZE) == 0);
3608 EffectiveSegment->Length = PAGE_ROUND_UP(EffectiveSegment->Length);
3609 }
3610 /*
3611 * The current segment is still part of the current effective segment:
3612 * extend the effective segment to reflect this
3613 */
3614 else if (EndOfEffectiveSegment > Segment->VirtualAddress)
3615 {
3616 static const ULONG FlagsToProtection[16] =
3617 {
3618 PAGE_NOACCESS,
3619 PAGE_READONLY,
3620 PAGE_READWRITE,
3621 PAGE_READWRITE,
3622 PAGE_EXECUTE_READ,
3623 PAGE_EXECUTE_READ,
3624 PAGE_EXECUTE_READWRITE,
3625 PAGE_EXECUTE_READWRITE,
3626 PAGE_WRITECOPY,
3627 PAGE_WRITECOPY,
3628 PAGE_WRITECOPY,
3629 PAGE_WRITECOPY,
3630 PAGE_EXECUTE_WRITECOPY,
3631 PAGE_EXECUTE_WRITECOPY,
3632 PAGE_EXECUTE_WRITECOPY,
3633 PAGE_EXECUTE_WRITECOPY
3634 };
3635
3636 unsigned ProtectionFlags;
3637
3638 /*
3639 * Extend the file size
3640 */
3641
3642 /* Unaligned segments must be contiguous within the file */
3643 if (Segment->FileOffset != (EffectiveSegment->FileOffset +
3644 EffectiveSegment->RawLength))
3645 {
3646 return FALSE;
3647 }
3648
3649 EffectiveSegment->RawLength += Segment->RawLength;
3650
3651 /*
3652 * Extend the virtual size
3653 */
3654 ASSERT(PAGE_ROUND_UP(Segment->VirtualAddress + Segment->Length) >= EndOfEffectiveSegment);
3655
3656 EffectiveSegment->Length = (ULONG)(PAGE_ROUND_UP(Segment->VirtualAddress + Segment->Length) -
3657 EffectiveSegment->VirtualAddress);
3658
3659 /*
3660 * Merge the protection
3661 */
3662 EffectiveSegment->Protection |= Segment->Protection;
3663
3664 /* Clean up redundance */
3665 ProtectionFlags = 0;
3666
3667 if(EffectiveSegment->Protection & PAGE_IS_READABLE)
3668 ProtectionFlags |= 1 << 0;
3669
3670 if(EffectiveSegment->Protection & PAGE_IS_WRITABLE)
3671 ProtectionFlags |= 1 << 1;
3672
3673 if(EffectiveSegment->Protection & PAGE_IS_EXECUTABLE)
3674 ProtectionFlags |= 1 << 2;
3675
3676 if(EffectiveSegment->Protection & PAGE_IS_WRITECOPY)
3677 ProtectionFlags |= 1 << 3;
3678
3679 ASSERT(ProtectionFlags < 16);
3680 EffectiveSegment->Protection = FlagsToProtection[ProtectionFlags];
3681
3682 /* If a segment was required to be shared and cannot, fail */
3683 if(!(Segment->Protection & PAGE_IS_WRITECOPY) &&
3684 EffectiveSegment->Protection & PAGE_IS_WRITECOPY)
3685 {
3686 return FALSE;
3687 }
3688 }
3689 /*
3690 * We assume no holes between segments at this point
3691 */
3692 else
3693 {
3694 KeBugCheck(MEMORY_MANAGEMENT);
3695 }
3696 }
3697 }
3698 ImageSectionObject->NrSegments = LastSegment + 1;
3699
3700 return TRUE;
3701 }
3702
3703 NTSTATUS
3704 ExeFmtpCreateImageSection(HANDLE FileHandle,
3705 PMM_IMAGE_SECTION_OBJECT ImageSectionObject)
3706 {
3707 LARGE_INTEGER Offset;
3708 PVOID FileHeader;
3709 PVOID FileHeaderBuffer;
3710 ULONG FileHeaderSize;
3711 ULONG Flags;
3712 ULONG OldNrSegments;
3713 NTSTATUS Status;
3714 ULONG i;
3715
3716 /*
3717 * Read the beginning of the file (2 pages). Should be enough to contain
3718 * all (or most) of the headers
3719 */
3720 Offset.QuadPart = 0;
3721
3722 /* FIXME: use FileObject instead of FileHandle */
3723 Status = ExeFmtpReadFile (FileHandle,
3724 &Offset,
3725 PAGE_SIZE * 2,
3726 &FileHeader,
3727 &FileHeaderBuffer,
3728 &FileHeaderSize);
3729
3730 if (!NT_SUCCESS(Status))
3731 return Status;
3732
3733 if (FileHeaderSize == 0)
3734 {
3735 ExFreePool(FileHeaderBuffer);
3736 return STATUS_UNSUCCESSFUL;
3737 }
3738
3739 /*
3740 * Look for a loader that can handle this executable
3741 */
3742 for (i = 0; i < RTL_NUMBER_OF(ExeFmtpLoaders); ++ i)
3743 {
3744 RtlZeroMemory(ImageSectionObject, sizeof(*ImageSectionObject));
3745 Flags = 0;
3746
3747 /* FIXME: use FileObject instead of FileHandle */
3748 Status = ExeFmtpLoaders[i](FileHeader,
3749 FileHeaderSize,
3750 FileHandle,
3751 ImageSectionObject,
3752 &Flags,
3753 ExeFmtpReadFile,
3754 ExeFmtpAllocateSegments);
3755
3756 if (!NT_SUCCESS(Status))
3757 {
3758 if (ImageSectionObject->Segments)
3759 {
3760 ExFreePool(ImageSectionObject->Segments);
3761 ImageSectionObject->Segments = NULL;
3762 }
3763 }
3764
3765 if (Status != STATUS_ROS_EXEFMT_UNKNOWN_FORMAT)
3766 break;
3767 }
3768
3769 ExFreePoolWithTag(FileHeaderBuffer, 'rXmM');
3770
3771 /*
3772 * No loader handled the format
3773 */
3774 if (Status == STATUS_ROS_EXEFMT_UNKNOWN_FORMAT)
3775 {
3776 Status = STATUS_INVALID_IMAGE_NOT_MZ;
3777 ASSERT(!NT_SUCCESS(Status));
3778 }
3779
3780 if (!NT_SUCCESS(Status))
3781 return Status;
3782
3783 ASSERT(ImageSectionObject->Segments != NULL);
3784
3785 /*
3786 * Some defaults
3787 */
3788 /* FIXME? are these values platform-dependent? */
3789 if(ImageSectionObject->StackReserve == 0)
3790 ImageSectionObject->StackReserve = 0x40000;
3791
3792 if(ImageSectionObject->StackCommit == 0)
3793 ImageSectionObject->StackCommit = 0x1000;
3794
3795 if(ImageSectionObject->ImageBase == 0)
3796 {
3797 if(ImageSectionObject->ImageCharacteristics & IMAGE_FILE_DLL)
3798 ImageSectionObject->ImageBase = 0x10000000;
3799 else
3800 ImageSectionObject->ImageBase = 0x00400000;
3801 }
3802
3803 /*
3804 * And now the fun part: fixing the segments
3805 */
3806
3807 /* Sort them by virtual address */
3808 MmspSortSegments(ImageSectionObject, Flags);
3809
3810 /* Ensure they don't overlap in memory */
3811 if (!MmspCheckSegmentBounds(ImageSectionObject, Flags))
3812 return STATUS_INVALID_IMAGE_FORMAT;
3813
3814 /* Ensure they are aligned */
3815 OldNrSegments = ImageSectionObject->NrSegments;
3816
3817 if (!MmspPageAlignSegments(ImageSectionObject, Flags))
3818 return STATUS_INVALID_IMAGE_FORMAT;
3819
3820 /* Trim them if the alignment phase merged some of them */
3821 if (ImageSectionObject->NrSegments < OldNrSegments)
3822 {
3823 PMM_SECTION_SEGMENT Segments;
3824 SIZE_T SizeOfSegments;
3825
3826 SizeOfSegments = sizeof(MM_SECTION_SEGMENT) * ImageSectionObject->NrSegments;
3827
3828 Segments = ExAllocatePoolWithTag(PagedPool,
3829 SizeOfSegments,
3830 TAG_MM_SECTION_SEGMENT);
3831
3832 if (Segments == NULL)
3833 return STATUS_INSUFFICIENT_RESOURCES;
3834
3835 RtlCopyMemory(Segments, ImageSectionObject->Segments, SizeOfSegments);
3836 ExFreePool(ImageSectionObject->Segments);
3837 ImageSectionObject->Segments = Segments;
3838 }
3839
3840 /* And finish their initialization */
3841 for ( i = 0; i < ImageSectionObject->NrSegments; ++ i )
3842 {
3843 ExInitializeFastMutex(&ImageSectionObject->Segments[i].Lock);
3844 ImageSectionObject->Segments[i].ReferenceCount = 1;
3845
3846 RtlZeroMemory(&ImageSectionObject->Segments[i].PageDirectory,
3847 sizeof(ImageSectionObject->Segments[i].PageDirectory));
3848 }
3849
3850 ASSERT(NT_SUCCESS(Status));
3851 return Status;
3852 }
3853
3854 NTSTATUS
3855 MmCreateImageSection(PROS_SECTION_OBJECT *SectionObject,
3856 ACCESS_MASK DesiredAccess,
3857 POBJECT_ATTRIBUTES ObjectAttributes,
3858 PLARGE_INTEGER UMaximumSize,
3859 ULONG SectionPageProtection,
3860 ULONG AllocationAttributes,
3861 HANDLE FileHandle)
3862 {
3863 PROS_SECTION_OBJECT Section;
3864 NTSTATUS Status;
3865 PFILE_OBJECT FileObject;
3866 PMM_SECTION_SEGMENT SectionSegments;
3867 PMM_IMAGE_SECTION_OBJECT ImageSectionObject;
3868 ULONG i;
3869 ULONG FileAccess = 0;
3870
3871 /*
3872 * Check file access required
3873 */
3874 if (SectionPageProtection & PAGE_READWRITE ||
3875 SectionPageProtection & PAGE_EXECUTE_READWRITE)
3876 {
3877 FileAccess = FILE_READ_DATA | FILE_WRITE_DATA;
3878 }
3879 else
3880 {
3881 FileAccess = FILE_READ_DATA;
3882 }
3883
3884 /*
3885 * Reference the file handle
3886 */
3887 Status = ObReferenceObjectByHandle(FileHandle,
3888 FileAccess,
3889 IoFileObjectType,
3890 ExGetPreviousMode(),
3891 (PVOID*)(PVOID)&FileObject,
3892 NULL);
3893
3894 if (!NT_SUCCESS(Status))
3895 {
3896 return Status;
3897 }
3898
3899 /*
3900 * Create the section
3901 */
3902 Status = ObCreateObject (ExGetPreviousMode(),
3903 MmSectionObjectType,
3904 ObjectAttributes,
3905 ExGetPreviousMode(),
3906 NULL,
3907 sizeof(ROS_SECTION_OBJECT),
3908 0,
3909 0,
3910 (PVOID*)(PVOID)&Section);
3911 if (!NT_SUCCESS(Status))
3912 {
3913 ObDereferenceObject(FileObject);
3914 return(Status);
3915 }
3916
3917 /*
3918 * Initialize it
3919 */
3920 RtlZeroMemory(Section, sizeof(ROS_SECTION_OBJECT));
3921 Section->SectionPageProtection = SectionPageProtection;
3922 Section->AllocationAttributes = AllocationAttributes;
3923
3924 #ifndef NEWCC
3925 /*
3926 * Initialized caching for this file object if previously caching
3927 * was initialized for the same on disk file
3928 */
3929 Status = CcTryToInitializeFileCache(FileObject);
3930 #else
3931 Status = STATUS_SUCCESS;
3932 #endif
3933
3934 if (!NT_SUCCESS(Status) || FileObject->SectionObjectPointer->ImageSectionObject == NULL)
3935 {
3936 NTSTATUS StatusExeFmt;
3937
3938 ImageSectionObject = ExAllocatePoolWithTag(PagedPool, sizeof(MM_IMAGE_SECTION_OBJECT), TAG_MM_SECTION_SEGMENT);
3939 if (ImageSectionObject == NULL)
3940 {
3941 ObDereferenceObject(FileObject);
3942 ObDereferenceObject(Section);
3943 return(STATUS_NO_MEMORY);
3944 }
3945
3946 RtlZeroMemory(ImageSectionObject, sizeof(MM_IMAGE_SECTION_OBJECT));
3947
3948 StatusExeFmt = ExeFmtpCreateImageSection(FileHandle, ImageSectionObject);
3949
3950 if (!NT_SUCCESS(StatusExeFmt))
3951 {
3952 if(ImageSectionObject->Segments != NULL)
3953 ExFreePool(ImageSectionObject->Segments);
3954
3955 ExFreePool(ImageSectionObject);
3956 ObDereferenceObject(Section);
3957 ObDereferenceObject(FileObject);
3958 return(StatusExeFmt);
3959 }
3960
3961 Section->ImageSection = ImageSectionObject;
3962 ASSERT(ImageSectionObject->Segments);
3963
3964 /*
3965 * Lock the file
3966 */
3967 Status = MmspWaitForFileLock(FileObject);
3968 if (!NT_SUCCESS(Status))
3969 {
3970 ExFreePool(ImageSectionObject->Segments);
3971 ExFreePool(ImageSectionObject);
3972 ObDereferenceObject(Section);
3973 ObDereferenceObject(FileObject);
3974 return(Status);
3975 }
3976
3977 if (NULL != InterlockedCompareExchangePointer(&FileObject->SectionObjectPointer->ImageSectionObject,
3978 ImageSectionObject, NULL))
3979 {
3980 /*
3981 * An other thread has initialized the same image in the background
3982 */
3983 ExFreePool(ImageSectionObject->Segments);
3984 ExFreePool(ImageSectionObject);
3985 ImageSectionObject = FileObject->SectionObjectPointer->ImageSectionObject;
3986 Section->ImageSection = ImageSectionObject;
3987 SectionSegments = ImageSectionObject->Segments;
3988
3989 for (i = 0; i < ImageSectionObject->NrSegments; i++)
3990 {
3991 (void)InterlockedIncrementUL(&SectionSegments[i].ReferenceCount);
3992 }
3993 }
3994
3995 Status = StatusExeFmt;
3996 }
3997 else
3998 {
3999 /*
4000 * Lock the file
4001 */
4002 Status = MmspWaitForFileLock(FileObject);
4003 if (Status != STATUS_SUCCESS)
4004 {
4005 ObDereferenceObject(Section);
4006 ObDereferenceObject(FileObject);
4007 return(Status);
4008 }
4009
4010 ImageSectionObject = FileObject->SectionObjectPointer->ImageSectionObject;
4011 Section->ImageSection = ImageSectionObject;
4012 SectionSegments = ImageSectionObject->Segments;
4013
4014 /*
4015 * Otherwise just reference all the section segments
4016 */
4017 for (i = 0; i < ImageSectionObject->NrSegments; i++)
4018 {
4019 (void)InterlockedIncrementUL(&SectionSegments[i].ReferenceCount);
4020 }
4021
4022 Status = STATUS_SUCCESS;
4023 }
4024 Section->FileObject = FileObject;
4025 #ifndef NEWCC
4026 CcRosReferenceCache(FileObject);
4027 #endif
4028 //KeSetEvent((PVOID)&FileObject->Lock, IO_NO_INCREMENT, FALSE);
4029 *SectionObject = Section;
4030 return(Status);
4031 }
4032
4033
4034
4035 static NTSTATUS
4036 MmMapViewOfSegment(PMMSUPPORT AddressSpace,
4037 PROS_SECTION_OBJECT Section,
4038 PMM_SECTION_SEGMENT Segment,
4039 PVOID* BaseAddress,
4040 SIZE_T ViewSize,
4041 ULONG Protect,
4042 ULONG ViewOffset,
4043 ULONG AllocationType)
4044 {
4045 PMEMORY_AREA MArea;
4046 NTSTATUS Status;
4047 PHYSICAL_ADDRESS BoundaryAddressMultiple;
4048
4049 BoundaryAddressMultiple.QuadPart = 0;
4050
4051 Status = MmCreateMemoryArea(AddressSpace,
4052 MEMORY_AREA_SECTION_VIEW,
4053 BaseAddress,
4054 ViewSize,
4055 Protect,
4056 &MArea,
4057 FALSE,
4058 AllocationType,
4059 BoundaryAddressMultiple);
4060 if (!NT_SUCCESS(Status))
4061 {
4062 DPRINT1("Mapping between 0x%.8X and 0x%.8X failed (%X).\n",
4063 (*BaseAddress), (char*)(*BaseAddress) + ViewSize, Status);
4064 return(Status);
4065 }
4066
4067 ObReferenceObject((PVOID)Section);
4068
4069 MArea->Data.SectionData.Segment = Segment;
4070 MArea->Data.SectionData.Section = Section;
4071 MArea->Data.SectionData.ViewOffset = ViewOffset;
4072 MmInitializeRegion(&MArea->Data.SectionData.RegionListHead,
4073 ViewSize, 0, Protect);
4074
4075 return(STATUS_SUCCESS);
4076 }
4077
4078
4079
4080 static VOID
4081 MmFreeSectionPage(PVOID Context, MEMORY_AREA* MemoryArea, PVOID Address,
4082 PFN_NUMBER Page, SWAPENTRY SwapEntry, BOOLEAN Dirty)
4083 {
4084 ULONG Entry;
4085 PFILE_OBJECT FileObject;
4086 PBCB Bcb;
4087 ULONG Offset;
4088 SWAPENTRY SavedSwapEntry;
4089 PMM_PAGEOP PageOp;
4090 NTSTATUS Status;
4091 PROS_SECTION_OBJECT Section;
4092 PMM_SECTION_SEGMENT Segment;
4093 PMMSUPPORT AddressSpace;
4094 PEPROCESS Process;
4095
4096 AddressSpace = (PMMSUPPORT)Context;
4097 Process = MmGetAddressSpaceOwner(AddressSpace);
4098
4099 Address = (PVOID)PAGE_ROUND_DOWN(Address);
4100
4101 Offset = (ULONG)(((ULONG_PTR)Address - (ULONG_PTR)MemoryArea->StartingAddress) +
4102 MemoryArea->Data.SectionData.ViewOffset);
4103
4104 Section = MemoryArea->Data.SectionData.Section;
4105 Segment = MemoryArea->Data.SectionData.Segment;
4106
4107 PageOp = MmCheckForPageOp(MemoryArea, NULL, NULL, Segment, Offset);
4108
4109 while (PageOp)
4110 {
4111 MmUnlockSectionSegment(Segment);
4112 MmUnlockAddressSpace(AddressSpace);
4113
4114 Status = MmspWaitForPageOpCompletionEvent(PageOp);
4115 if (Status != STATUS_SUCCESS)
4116 {
4117 DPRINT1("Failed to wait for page op, status = %x\n", Status);
4118 KeBugCheck(MEMORY_MANAGEMENT);
4119 }
4120
4121 MmLockAddressSpace(AddressSpace);
4122 MmLockSectionSegment(Segment);
4123 MmspCompleteAndReleasePageOp(PageOp);
4124 PageOp = MmCheckForPageOp(MemoryArea, NULL, NULL, Segment, Offset);
4125 }
4126
4127 Entry = MmGetPageEntrySectionSegment(Segment, Offset);
4128
4129 /*
4130 * For a dirty, datafile, non-private page mark it as dirty in the
4131 * cache manager.
4132 */
4133 if (Segment->Flags & MM_DATAFILE_SEGMENT)
4134 {
4135 if (Page == PFN_FROM_SSE(Entry) && Dirty)
4136 {
4137 FileObject = MemoryArea->Data.SectionData.Section->FileObject;
4138 Bcb = FileObject->SectionObjectPointer->SharedCacheMap;
4139 #ifndef NEWCC
4140 CcRosMarkDirtyCacheSegment(Bcb, Offset + Segment->FileOffset);
4141 #endif
4142 ASSERT(SwapEntry == 0);
4143 }
4144 }
4145
4146 if (SwapEntry != 0)
4147 {
4148 /*
4149 * Sanity check
4150 */
4151 if (Segment->Flags & MM_PAGEFILE_SEGMENT)
4152 {
4153 DPRINT1("Found a swap entry for a page in a pagefile section.\n");
4154 KeBugCheck(MEMORY_MANAGEMENT);
4155 }
4156 MmFreeSwapPage(SwapEntry);
4157 }
4158 else if (Page != 0)
4159 {
4160 if (IS_SWAP_FROM_SSE(Entry) ||
4161 Page != PFN_FROM_SSE(Entry))
4162 {
4163 /*
4164 * Sanity check
4165 */
4166 if (Segment->Flags & MM_PAGEFILE_SEGMENT)
4167 {
4168 DPRINT1("Found a private page in a pagefile section.\n");
4169 KeBugCheck(MEMORY_MANAGEMENT);
4170 }
4171 /*
4172 * Just dereference private pages
4173 */
4174 SavedSwapEntry = MmGetSavedSwapEntryPage(Page);
4175 if (SavedSwapEntry != 0)
4176 {
4177 MmFreeSwapPage(SavedSwapEntry);
4178 MmSetSavedSwapEntryPage(Page, 0);
4179 }
4180 MmDeleteRmap(Page, Process, Address);
4181 MmReleasePageMemoryConsumer(MC_USER, Page);
4182 }
4183 else
4184 {
4185 MmDeleteRmap(Page, Process, Address);
4186 MmUnsharePageEntrySectionSegment(Section, Segment, Offset, Dirty, FALSE);
4187 }
4188 }
4189 }
4190
4191 static NTSTATUS
4192 MmUnmapViewOfSegment(PMMSUPPORT AddressSpace,
4193 PVOID BaseAddress)
4194 {
4195 NTSTATUS Status;
4196 PMEMORY_AREA MemoryArea;
4197 PROS_SECTION_OBJECT Section;
4198 PMM_SECTION_SEGMENT Segment;
4199 PLIST_ENTRY CurrentEntry;
4200 PMM_REGION CurrentRegion;
4201 PLIST_ENTRY RegionListHead;
4202
4203 MemoryArea = MmLocateMemoryAreaByAddress(AddressSpace,
4204 BaseAddress);
4205 if (MemoryArea == NULL)
4206 {
4207 return(STATUS_UNSUCCESSFUL);
4208 }
4209
4210 MemoryArea->DeleteInProgress = TRUE;
4211 Section = MemoryArea->Data.SectionData.Section;
4212 Segment = MemoryArea->Data.SectionData.Segment;
4213
4214 MmLockSectionSegment(Segment);
4215
4216 RegionListHead = &MemoryArea->Data.SectionData.RegionListHead;
4217 while (!IsListEmpty(RegionListHead))
4218 {
4219 CurrentEntry = RemoveHeadList(RegionListHead);
4220 CurrentRegion = CONTAINING_RECORD(CurrentEntry, MM_REGION, RegionListEntry);
4221 ExFreePoolWithTag(CurrentRegion, TAG_MM_REGION);
4222 }
4223
4224 if (Section->AllocationAttributes & SEC_PHYSICALMEMORY)
4225 {
4226 Status = MmFreeMemoryArea(AddressSpace,
4227 MemoryArea,
4228 NULL,
4229 NULL);
4230 }
4231 else
4232 {
4233 Status = MmFreeMemoryArea(AddressSpace,
4234 MemoryArea,
4235 MmFreeSectionPage,
4236 AddressSpace);
4237 }
4238 MmUnlockSectionSegment(Segment);
4239 ObDereferenceObject(Section);
4240 return(Status);
4241 }
4242
4243 /*
4244 * @implemented
4245 */
4246 NTSTATUS NTAPI
4247 MmUnmapViewOfSection(PEPROCESS Process,
4248 PVOID BaseAddress)
4249 {
4250 NTSTATUS Status;
4251 PMEMORY_AREA MemoryArea;
4252 PMMSUPPORT AddressSpace;
4253 PROS_SECTION_OBJECT Section;
4254 PMM_PAGEOP PageOp;
4255 ULONG_PTR Offset;
4256 PVOID ImageBaseAddress = 0;
4257
4258 DPRINT("Opening memory area Process %x BaseAddress %x\n",
4259 Process, BaseAddress);
4260
4261 ASSERT(Process);
4262
4263 AddressSpace = &Process->Vm;
4264
4265 MmLockAddressSpace(AddressSpace);
4266 MemoryArea = MmLocateMemoryAreaByAddress(AddressSpace,
4267 BaseAddress);
4268 if (MemoryArea == NULL ||
4269 MemoryArea->Type != MEMORY_AREA_SECTION_VIEW ||
4270 MemoryArea->DeleteInProgress)
4271 {
4272 MmUnlockAddressSpace(AddressSpace);
4273 return STATUS_NOT_MAPPED_VIEW;
4274 }
4275
4276 MemoryArea->DeleteInProgress = TRUE;
4277
4278 while (MemoryArea->PageOpCount)
4279 {
4280 Offset = PAGE_ROUND_UP((ULONG_PTR)MemoryArea->EndingAddress - (ULONG_PTR)MemoryArea->StartingAddress);
4281
4282 while (Offset)
4283 {
4284 Offset -= PAGE_SIZE;
4285 PageOp = MmCheckForPageOp(MemoryArea, NULL, NULL,
4286 MemoryArea->Data.SectionData.Segment,
4287 (ULONG)Offset + MemoryArea->Data.SectionData.ViewOffset);
4288 if (PageOp)
4289 {
4290 MmUnlockAddressSpace(AddressSpace);
4291 Status = MmspWaitForPageOpCompletionEvent(PageOp);
4292 if (Status != STATUS_SUCCESS)
4293 {
4294 DPRINT1("Failed to wait for page op, status = %x\n", Status);
4295 KeBugCheck(MEMORY_MANAGEMENT);
4296 }
4297 MmLockAddressSpace(AddressSpace);
4298 MemoryArea = MmLocateMemoryAreaByAddress(AddressSpace,
4299 BaseAddress);
4300 if (MemoryArea == NULL ||
4301 MemoryArea->Type != MEMORY_AREA_SECTION_VIEW)
4302 {
4303 MmUnlockAddressSpace(AddressSpace);
4304 return STATUS_NOT_MAPPED_VIEW;
4305 }
4306 break;
4307 }
4308 }
4309 }
4310
4311 Section = MemoryArea->Data.SectionData.Section;
4312
4313 if (Section->AllocationAttributes & SEC_IMAGE)
4314 {
4315 ULONG i;
4316 ULONG NrSegments;
4317 PMM_IMAGE_SECTION_OBJECT ImageSectionObject;
4318 PMM_SECTION_SEGMENT SectionSegments;
4319 PMM_SECTION_SEGMENT Segment;
4320
4321 Segment = MemoryArea->Data.SectionData.Segment;
4322 ImageSectionObject = Section->ImageSection;
4323 SectionSegments = ImageSectionObject->Segments;
4324 NrSegments = ImageSectionObject->NrSegments;
4325
4326 /* Search for the current segment within the section segments
4327 * and calculate the image base address */
4328 for (i = 0; i < NrSegments; i++)
4329 {
4330 if (Segment == &SectionSegments[i])
4331 {
4332 ImageBaseAddress = (char*)BaseAddress - (ULONG_PTR)SectionSegments[i].VirtualAddress;
4333 break;
4334 }
4335 }
4336 if (i >= NrSegments)
4337 {
4338 KeBugCheck(MEMORY_MANAGEMENT);
4339 }
4340
4341 for (i = 0; i < NrSegments; i++)
4342 {
4343 PVOID SBaseAddress = (PVOID)
4344 ((char*)ImageBaseAddress + (ULONG_PTR)SectionSegments[i].VirtualAddress);
4345
4346 Status = MmUnmapViewOfSegment(AddressSpace, SBaseAddress);
4347 }
4348 }
4349 else
4350 {
4351 Status = MmUnmapViewOfSegment(AddressSpace, BaseAddress);
4352 }
4353
4354 MmUnlockAddressSpace(AddressSpace);
4355
4356 /* Notify debugger */
4357 if (ImageBaseAddress) DbgkUnMapViewOfSection(ImageBaseAddress);
4358
4359 return(STATUS_SUCCESS);
4360 }
4361
4362
4363
4364
4365 /**
4366 * Queries the information of a section object.
4367 *
4368 * @param SectionHandle
4369 * Handle to the section object. It must be opened with SECTION_QUERY
4370 * access.
4371 * @param SectionInformationClass
4372 * Index to a certain information structure. Can be either
4373 * SectionBasicInformation or SectionImageInformation. The latter
4374 * is valid only for sections that were created with the SEC_IMAGE
4375 * flag.
4376 * @param SectionInformation
4377 * Caller supplies storage for resulting information.
4378 * @param Length
4379 * Size of the supplied storage.
4380 * @param ResultLength
4381 * Data written.
4382 *
4383 * @return Status.
4384 *
4385 * @implemented
4386 */
4387 NTSTATUS NTAPI
4388 NtQuerySection(IN HANDLE SectionHandle,
4389 IN SECTION_INFORMATION_CLASS SectionInformationClass,
4390 OUT PVOID SectionInformation,
4391 IN SIZE_T SectionInformationLength,
4392 OUT PSIZE_T ResultLength OPTIONAL)
4393 {
4394 PROS_SECTION_OBJECT Section;
4395 KPROCESSOR_MODE PreviousMode;
4396 NTSTATUS Status;
4397 PAGED_CODE();
4398
4399 PreviousMode = ExGetPreviousMode();
4400
4401 Status = DefaultQueryInfoBufferCheck(SectionInformationClass,
4402 ExSectionInfoClass,
4403 sizeof(ExSectionInfoClass) / sizeof(ExSectionInfoClass[0]),
4404 SectionInformation,
4405 (ULONG)SectionInformationLength,
4406 NULL,
4407 ResultLength,
4408 PreviousMode);
4409
4410 if(!NT_SUCCESS(Status))
4411 {
4412 DPRINT1("NtQuerySection() failed, Status: 0x%x\n", Status);
4413 return Status;
4414 }
4415
4416 Status = ObReferenceObjectByHandle(SectionHandle,
4417 SECTION_QUERY,
4418 MmSectionObjectType,
4419 PreviousMode,
4420 (PVOID*)(PVOID)&Section,
4421 NULL);
4422 if (NT_SUCCESS(Status))
4423 {
4424 switch (SectionInformationClass)
4425 {
4426 case SectionBasicInformation:
4427 {
4428 PSECTION_BASIC_INFORMATION Sbi = (PSECTION_BASIC_INFORMATION)SectionInformation;
4429
4430 _SEH2_TRY
4431 {
4432 Sbi->Attributes = Section->AllocationAttributes;
4433 if (Section->AllocationAttributes & SEC_IMAGE)
4434 {
4435 Sbi->BaseAddress = 0;
4436 Sbi->Size.QuadPart = 0;
4437 }
4438 else
4439 {
4440 Sbi->BaseAddress = (PVOID)Section->Segment->VirtualAddress;
4441 Sbi->Size.QuadPart = Section->Segment->Length;
4442 }
4443
4444 if (ResultLength != NULL)
4445 {
4446 *ResultLength = sizeof(SECTION_BASIC_INFORMATION);
4447 }
4448 Status = STATUS_SUCCESS;
4449 }
4450 _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
4451 {
4452 Status = _SEH2_GetExceptionCode();
4453 }
4454 _SEH2_END;
4455
4456 break;
4457 }
4458
4459 case SectionImageInformation:
4460 {
4461 PSECTION_IMAGE_INFORMATION Sii = (PSECTION_IMAGE_INFORMATION)SectionInformation;
4462
4463 _SEH2_TRY
4464 {
4465 memset(Sii, 0, sizeof(SECTION_IMAGE_INFORMATION));
4466 if (Section->AllocationAttributes & SEC_IMAGE)
4467 {
4468 PMM_IMAGE_SECTION_OBJECT ImageSectionObject;
4469 ImageSectionObject = Section->ImageSection;
4470
4471 Sii->TransferAddress = (PVOID)ImageSectionObject->EntryPoint;
4472 Sii->MaximumStackSize = ImageSectionObject->StackReserve;
4473 Sii->CommittedStackSize = ImageSectionObject->StackCommit;
4474 Sii->SubSystemType = ImageSectionObject->Subsystem;
4475 Sii->SubSystemMinorVersion = ImageSectionObject->MinorSubsystemVersion;
4476 Sii->SubSystemMajorVersion = ImageSectionObject->MajorSubsystemVersion;
4477 Sii->ImageCharacteristics = ImageSectionObject->ImageCharacteristics;
4478 Sii->Machine = ImageSectionObject->Machine;
4479 Sii->ImageContainsCode = ImageSectionObject->Executable;
4480 }
4481
4482 if (ResultLength != NULL)
4483 {
4484 *ResultLength = sizeof(SECTION_IMAGE_INFORMATION);
4485 }
4486 Status = STATUS_SUCCESS;
4487 }
4488 _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
4489 {
4490 Status = _SEH2_GetExceptionCode();
4491 }
4492 _SEH2_END;
4493
4494 break;
4495 }
4496 }
4497
4498 ObDereferenceObject(Section);
4499 }
4500
4501 return(Status);
4502 }
4503
4504 /**********************************************************************
4505 * NAME EXPORTED
4506 * MmMapViewOfSection
4507 *
4508 * DESCRIPTION
4509 * Maps a view of a section into the virtual address space of a
4510 * process.
4511 *
4512 * ARGUMENTS
4513 * Section
4514 * Pointer to the section object.
4515 *
4516 * ProcessHandle
4517 * Pointer to the process.
4518 *
4519 * BaseAddress
4520 * Desired base address (or NULL) on entry;
4521 * Actual base address of the view on exit.
4522 *
4523 * ZeroBits
4524 * Number of high order address bits that must be zero.
4525 *
4526 * CommitSize
4527 * Size in bytes of the initially committed section of
4528 * the view.
4529 *
4530 * SectionOffset
4531 * Offset in bytes from the beginning of the section
4532 * to the beginning of the view.
4533 *
4534 * ViewSize
4535 * Desired length of map (or zero to map all) on entry
4536 * Actual length mapped on exit.
4537 *
4538 * InheritDisposition
4539 * Specified how the view is to be shared with
4540 * child processes.
4541 *
4542 * AllocationType
4543 * Type of allocation for the pages.
4544 *
4545 * Protect
4546 * Protection for the committed region of the view.
4547 *
4548 * RETURN VALUE
4549 * Status.
4550 *
4551 * @implemented
4552 */
4553 NTSTATUS NTAPI
4554 MmMapViewOfSection(IN PVOID SectionObject,
4555 IN PEPROCESS Process,
4556 IN OUT PVOID *BaseAddress,
4557 IN ULONG_PTR ZeroBits,
4558 IN SIZE_T CommitSize,
4559 IN OUT PLARGE_INTEGER SectionOffset OPTIONAL,
4560 IN OUT PSIZE_T ViewSize,
4561 IN SECTION_INHERIT InheritDisposition,
4562 IN ULONG AllocationType,
4563 IN ULONG Protect)
4564 {
4565 PROS_SECTION_OBJECT Section;
4566 PMMSUPPORT AddressSpace;
4567 ULONG ViewOffset;
4568 NTSTATUS Status = STATUS_SUCCESS;
4569 BOOLEAN NotAtBase = FALSE;
4570
4571 if ((ULONG_PTR)SectionObject & 1)
4572 {
4573 return MmMapViewOfArm3Section((PVOID)((ULONG_PTR)SectionObject & ~1),
4574 Process,
4575 BaseAddress,
4576 ZeroBits,
4577 CommitSize,
4578 SectionOffset,
4579 ViewSize,
4580 InheritDisposition,
4581 AllocationType,
4582 Protect);
4583 }
4584
4585 ASSERT(Process);
4586
4587 if (!Protect || Protect & ~PAGE_FLAGS_VALID_FOR_SECTION)
4588 {
4589 return STATUS_INVALID_PAGE_PROTECTION;
4590 }
4591
4592
4593 Section = (PROS_SECTION_OBJECT)SectionObject;
4594 AddressSpace = &Process->Vm;
4595
4596 AllocationType |= (Section->AllocationAttributes & SEC_NO_CHANGE);
4597
4598 MmLockAddressSpace(AddressSpace);
4599
4600 if (Section->AllocationAttributes & SEC_IMAGE)
4601 {
4602 ULONG i;
4603 ULONG NrSegments;
4604 ULONG_PTR ImageBase;
4605 SIZE_T ImageSize;
4606 PMM_IMAGE_SECTION_OBJECT ImageSectionObject;
4607 PMM_SECTION_SEGMENT SectionSegments;
4608
4609 ImageSectionObject = Section->ImageSection;
4610 SectionSegments = ImageSectionObject->Segments;
4611 NrSegments = ImageSectionObject->NrSegments;
4612
4613
4614 ImageBase = (ULONG_PTR)*BaseAddress;
4615 if (ImageBase == 0)
4616 {
4617 ImageBase = ImageSectionObject->ImageBase;
4618 }
4619
4620 ImageSize = 0;
4621 for (i = 0; i < NrSegments; i++)
4622 {
4623 ULONG_PTR MaxExtent;
4624 MaxExtent = (ULONG_PTR)SectionSegments[i].VirtualAddress +
4625 SectionSegments[i].Length;
4626 ImageSize = max(ImageSize, MaxExtent);
4627 }
4628
4629 ImageSectionObject->ImageSize = (ULONG)ImageSize;
4630
4631 /* Check for an illegal base address */
4632 if ((ImageBase + ImageSize) > (ULONG_PTR)MmHighestUserAddress)
4633 {
4634 ImageBase = PAGE_ROUND_DOWN((ULONG_PTR)MmHighestUserAddress - ImageSize);
4635 }
4636
4637 /* Check there is enough space to map the section at that point. */
4638 if (MmLocateMemoryAreaByRegion(AddressSpace, (PVOID)ImageBase,
4639 PAGE_ROUND_UP(ImageSize)) != NULL)
4640 {
4641 /* Fail if the user requested a fixed base address. */
4642 if ((*BaseAddress) != NULL)
4643 {
4644 MmUnlockAddressSpace(AddressSpace);
4645 return(STATUS_UNSUCCESSFUL);
4646 }
4647 /* Otherwise find a gap to map the image. */
4648 ImageBase = (ULONG_PTR)MmFindGap(AddressSpace, PAGE_ROUND_UP(ImageSize), PAGE_SIZE, FALSE);
4649 if (ImageBase == 0)
4650 {
4651 MmUnlockAddressSpace(AddressSpace);
4652 return(STATUS_UNSUCCESSFUL);
4653 }
4654 /* Remember that we loaded image at a different base address */
4655 NotAtBase = TRUE;
4656 }
4657
4658 for (i = 0; i < NrSegments; i++)
4659 {
4660 PVOID SBaseAddress = (PVOID)
4661 ((char*)ImageBase + (ULONG_PTR)SectionSegments[i].VirtualAddress);
4662 MmLockSectionSegment(&SectionSegments[i]);
4663 Status = MmMapViewOfSegment(AddressSpace,
4664 Section,
4665 &SectionSegments[i],
4666 &SBaseAddress,
4667 SectionSegments[i].Length,
4668 SectionSegments[i].Protection,
4669 0,
4670 0);
4671 MmUnlockSectionSegment(&SectionSegments[i]);
4672 if (!NT_SUCCESS(Status))
4673 {
4674 MmUnlockAddressSpace(AddressSpace);
4675 return(Status);
4676 }
4677 }
4678
4679 *BaseAddress = (PVOID)ImageBase;
4680 *ViewSize = ImageSize;
4681 }
4682 else
4683 {
4684 /* check for write access */
4685 if ((Protect & (PAGE_READWRITE|PAGE_EXECUTE_READWRITE)) &&
4686 !(Section->SectionPageProtection & (PAGE_READWRITE|PAGE_EXECUTE_READWRITE)))
4687 {
4688 MmUnlockAddressSpace(AddressSpace);
4689 return STATUS_SECTION_PROTECTION;
4690 }
4691 /* check for read access */
4692 if ((Protect & (PAGE_READONLY|PAGE_WRITECOPY|PAGE_EXECUTE_READ|PAGE_EXECUTE_WRITECOPY)) &&
4693 !(Section->SectionPageProtection & (PAGE_READONLY|PAGE_READWRITE|PAGE_WRITECOPY|PAGE_EXECUTE_READ|PAGE_EXECUTE_READWRITE|PAGE_EXECUTE_WRITECOPY)))
4694 {
4695 MmUnlockAddressSpace(AddressSpace);
4696 return STATUS_SECTION_PROTECTION;
4697 }
4698 /* check for execute access */
4699 if ((Protect & (PAGE_EXECUTE|PAGE_EXECUTE_READ|PAGE_EXECUTE_READWRITE|PAGE_EXECUTE_WRITECOPY)) &&
4700 !(Section->SectionPageProtection & (PAGE_EXECUTE|PAGE_EXECUTE_READ|PAGE_EXECUTE_READWRITE|PAGE_EXECUTE_WRITECOPY)))
4701 {
4702 MmUnlockAddressSpace(AddressSpace);
4703 return STATUS_SECTION_PROTECTION;
4704 }
4705
4706 if (ViewSize == NULL)
4707 {
4708 /* Following this pointer would lead to us to the dark side */
4709 /* What to do? Bugcheck? Return status? Do the mambo? */
4710 KeBugCheck(MEMORY_MANAGEMENT);
4711 }
4712
4713 if (SectionOffset == NULL)
4714 {
4715 ViewOffset = 0;
4716 }
4717 else
4718 {
4719 ViewOffset = SectionOffset->u.LowPart;
4720 }
4721
4722 if ((ViewOffset % PAGE_SIZE) != 0)
4723 {
4724 MmUnlockAddressSpace(AddressSpace);
4725 return(STATUS_MAPPED_ALIGNMENT);
4726 }
4727
4728 if ((*ViewSize) == 0)
4729 {
4730 (*ViewSize) = Section->MaximumSize.u.LowPart - ViewOffset;
4731 }
4732 else if (((*ViewSize)+ViewOffset) > Section->MaximumSize.u.LowPart)
4733 {
4734 (*ViewSize) = Section->MaximumSize.u.LowPart - ViewOffset;
4735 }
4736
4737 *ViewSize = PAGE_ROUND_UP(*ViewSize);
4738
4739 MmLockSectionSegment(Section->Segment);
4740 Status = MmMapViewOfSegment(AddressSpace,
4741 Section,
4742 Section->Segment,
4743 BaseAddress,
4744 *ViewSize,
4745 Protect,
4746 ViewOffset,
4747 AllocationType & (MEM_TOP_DOWN|SEC_NO_CHANGE));
4748 MmUnlockSectionSegment(Section->Segment);
4749 if (!NT_SUCCESS(Status))
4750 {
4751 MmUnlockAddressSpace(AddressSpace);
4752 return(Status);
4753 }
4754 }
4755
4756 MmUnlockAddressSpace(AddressSpace);
4757
4758 if (NotAtBase)
4759 Status = STATUS_IMAGE_NOT_AT_BASE;
4760 else
4761 Status = STATUS_SUCCESS;
4762
4763 return Status;
4764 }
4765
4766 /*
4767 * @unimplemented
4768 */
4769 BOOLEAN NTAPI
4770 MmCanFileBeTruncated (IN PSECTION_OBJECT_POINTERS SectionObjectPointer,
4771 IN PLARGE_INTEGER NewFileSize)
4772 {
4773 /* Check whether an ImageSectionObject exists */
4774 if (SectionObjectPointer->ImageSectionObject != NULL)
4775 {
4776 DPRINT1("ERROR: File can't be truncated because it has an image section\n");
4777 return FALSE;
4778 }
4779
4780 if (SectionObjectPointer->DataSectionObject != NULL)
4781 {
4782 PMM_SECTION_SEGMENT Segment;
4783
4784 Segment = (PMM_SECTION_SEGMENT)SectionObjectPointer->
4785 DataSectionObject;
4786
4787 if (Segment->ReferenceCount != 0)
4788 {
4789 /* Check size of file */
4790 if (SectionObjectPointer->SharedCacheMap)
4791 {
4792 PBCB Bcb = SectionObjectPointer->SharedCacheMap;
4793 if (NewFileSize->QuadPart <= Bcb->FileSize.QuadPart)
4794 {
4795 return FALSE;
4796 }
4797 }
4798 }
4799 else
4800 {
4801 /* Something must gone wrong
4802 * how can we have a Section but no
4803 * reference? */
4804 DPRINT("ERROR: DataSectionObject without reference!\n");
4805 }
4806 }
4807
4808 DPRINT("FIXME: didn't check for outstanding write probes\n");
4809
4810 return TRUE;
4811 }
4812
4813
4814
4815
4816 /*
4817 * @implemented
4818 */
4819 BOOLEAN NTAPI
4820 MmFlushImageSection (IN PSECTION_OBJECT_POINTERS SectionObjectPointer,
4821 IN MMFLUSH_TYPE FlushType)
4822 {
4823 switch(FlushType)
4824 {
4825 case MmFlushForDelete:
4826 if (SectionObjectPointer->ImageSectionObject ||
4827 SectionObjectPointer->DataSectionObject)
4828 {
4829 return FALSE;
4830 }
4831 #ifndef NEWCC
4832 CcRosSetRemoveOnClose(SectionObjectPointer);
4833 #endif
4834 return TRUE;
4835 case MmFlushForWrite:
4836 break;
4837 }
4838 return FALSE;
4839 }
4840
4841 /*
4842 * @implemented
4843 */
4844 NTSTATUS NTAPI
4845 MmMapViewInSystemSpace (IN PVOID SectionObject,
4846 OUT PVOID * MappedBase,
4847 IN OUT PSIZE_T ViewSize)
4848 {
4849 PROS_SECTION_OBJECT Section;
4850 PMMSUPPORT AddressSpace;
4851 NTSTATUS Status;
4852 PAGED_CODE();
4853
4854 if ((ULONG_PTR)SectionObject & 1)
4855 {
4856 extern PVOID MmSession;
4857 return MiMapViewInSystemSpace((PVOID)((ULONG_PTR)SectionObject & ~1),
4858 &MmSession,
4859 MappedBase,
4860 ViewSize);
4861 }
4862
4863 DPRINT("MmMapViewInSystemSpace() called\n");
4864
4865 Section = (PROS_SECTION_OBJECT)SectionObject;
4866 AddressSpace = MmGetKernelAddressSpace();
4867
4868 MmLockAddressSpace(AddressSpace);
4869
4870
4871 if ((*ViewSize) == 0)
4872 {
4873 (*ViewSize) = Section->MaximumSize.u.LowPart;
4874 }
4875 else if ((*ViewSize) > Section->MaximumSize.u.LowPart)
4876 {
4877 (*ViewSize) = Section->MaximumSize.u.LowPart;
4878 }
4879
4880 MmLockSectionSegment(Section->Segment);
4881
4882
4883 Status = MmMapViewOfSegment(AddressSpace,
4884 Section,
4885 Section->Segment,
4886 MappedBase,
4887 *ViewSize,
4888 PAGE_READWRITE,
4889 0,
4890 0);
4891
4892 MmUnlockSectionSegment(Section->Segment);
4893 MmUnlockAddressSpace(AddressSpace);
4894
4895 return Status;
4896 }
4897
4898 /*
4899 * @implemented
4900 */
4901 NTSTATUS NTAPI
4902 MmUnmapViewInSystemSpace (IN PVOID MappedBase)
4903 {
4904 PMMSUPPORT AddressSpace;
4905 NTSTATUS Status;
4906
4907 DPRINT("MmUnmapViewInSystemSpace() called\n");
4908
4909 AddressSpace = MmGetKernelAddressSpace();
4910
4911 MmLockAddressSpace(AddressSpace);
4912
4913 Status = MmUnmapViewOfSegment(AddressSpace, MappedBase);
4914
4915 MmUnlockAddressSpace(AddressSpace);
4916
4917 return Status;
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 /* Check if an ARM3 section is being created instead */
4990 if (AllocationAttributes & 1)
4991 {
4992 DPRINT1("arm 3 path\n");
4993 return MmCreateArm3Section(Section,
4994 DesiredAccess,
4995 ObjectAttributes,
4996 MaximumSize,
4997 SectionPageProtection,
4998 AllocationAttributes &~ 1,
4999 FileHandle,
5000 File);
5001 }
5002
5003 /*
5004 * Check the protection
5005 */
5006 Protection = SectionPageProtection & ~(PAGE_GUARD|PAGE_NOCACHE);
5007 if (Protection != PAGE_READONLY &&
5008 Protection != PAGE_READWRITE &&
5009 Protection != PAGE_WRITECOPY &&
5010 Protection != PAGE_EXECUTE &&
5011 Protection != PAGE_EXECUTE_READ &&
5012 Protection != PAGE_EXECUTE_READWRITE &&
5013 Protection != PAGE_EXECUTE_WRITECOPY)
5014 {
5015 return STATUS_INVALID_PAGE_PROTECTION;
5016 }
5017
5018 if (AllocationAttributes & SEC_IMAGE)
5019 {
5020 return(MmCreateImageSection(SectionObject,
5021 DesiredAccess,
5022 ObjectAttributes,
5023 MaximumSize,
5024 SectionPageProtection,
5025 AllocationAttributes,
5026 FileHandle));
5027 }
5028
5029 if (FileHandle != NULL)
5030 {
5031 return(MmCreateDataFileSection(SectionObject,
5032 DesiredAccess,
5033 ObjectAttributes,
5034 MaximumSize,
5035 SectionPageProtection,
5036 AllocationAttributes,
5037 FileHandle));
5038 }
5039
5040 return(MmCreatePageFileSection(SectionObject,
5041 DesiredAccess,
5042 ObjectAttributes,
5043 MaximumSize,
5044 SectionPageProtection,
5045 AllocationAttributes));
5046 }
5047
5048
5049
5050 /* EOF */
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