ReactOS  0.4.15-dev-5109-g2469ce2
section.c File Reference
#include <ntoskrnl.h>
#include <debug.h>
#include <mm/ARM3/miarm.h>
Include dependency graph for section.c:

Go to the source code of this file.

Macros

#define NDEBUG
 
#define MODULE_INVOLVED_IN_ARM3
 

Functions

BOOLEAN NTAPI MiIsProtectionCompatible (IN ULONG SectionPageProtection, IN ULONG NewSectionPageProtection)
 
ACCESS_MASK NTAPI MiArm3GetCorrectFileAccessMask (IN ACCESS_MASK SectionPageProtection)
 
ULONG NTAPI MiMakeProtectionMask (IN ULONG Protect)
 
BOOLEAN NTAPI MiInitializeSystemSpaceMap (IN PMMSESSION InputSession OPTIONAL)
 
PVOID NTAPI MiInsertInSystemSpace (IN PMMSESSION Session, IN ULONG Buckets, IN PCONTROL_AREA ControlArea)
 
static NTSTATUS MiAddMappedPtes (IN PMMPTE FirstPte, IN PFN_NUMBER PteCount, IN PCONTROL_AREA ControlArea, IN LONGLONG SectionOffset)
 
VOID NTAPI MiFillSystemPageDirectory (IN PVOID Base, IN SIZE_T NumberOfBytes)
 
NTSTATUS NTAPI MiCheckPurgeAndUpMapCount (IN PCONTROL_AREA ControlArea, IN BOOLEAN FailIfSystemViews)
 
PSUBSECTION NTAPI MiLocateSubsection (IN PMMVAD Vad, IN ULONG_PTR Vpn)
 
VOID NTAPI MiSegmentDelete (IN PSEGMENT Segment)
 
VOID NTAPI MiCheckControlArea (IN PCONTROL_AREA ControlArea, IN KIRQL OldIrql)
 
VOID NTAPI MiDereferenceControlArea (IN PCONTROL_AREA ControlArea)
 
VOID NTAPI MiRemoveMappedView (IN PEPROCESS CurrentProcess, IN PMMVAD Vad)
 
NTSTATUS NTAPI MiUnmapViewOfSection (IN PEPROCESS Process, IN PVOID BaseAddress, IN ULONG Flags)
 
NTSTATUS NTAPI MiSessionCommitPageTables (IN PVOID StartVa, IN PVOID EndVa)
 
NTSTATUS MiMapViewInSystemSpace (_In_ PVOID Section, _In_ PMMSESSION Session, _Outptr_result_bytebuffer_(*ViewSize) PVOID *MappedBase, _Inout_ PSIZE_T ViewSize, _Inout_ PLARGE_INTEGER SectionOffset)
 
VOID NTAPI MiSetControlAreaSymbolsLoaded (IN PCONTROL_AREA ControlArea)
 
VOID NTAPI MiLoadUserSymbols (IN PCONTROL_AREA ControlArea, IN PVOID BaseAddress, IN PEPROCESS Process)
 
NTSTATUS NTAPI MiMapViewOfDataSection (IN PCONTROL_AREA ControlArea, IN PEPROCESS Process, IN PVOID *BaseAddress, IN PLARGE_INTEGER SectionOffset, IN PSIZE_T ViewSize, IN PSECTION Section, IN SECTION_INHERIT InheritDisposition, IN ULONG ProtectionMask, IN SIZE_T CommitSize, IN ULONG_PTR ZeroBits, IN ULONG AllocationType)
 
VOID NTAPI MiSubsectionConsistent (IN PSUBSECTION Subsection)
 
NTSTATUS NTAPI MiCreateDataFileMap (IN PFILE_OBJECT File, OUT PSEGMENT *Segment, IN PSIZE_T MaximumSize, IN ULONG SectionPageProtection, IN ULONG AllocationAttributes, IN ULONG IgnoreFileSizing)
 
static NTSTATUS NTAPI MiCreatePagingFileMap (OUT PSEGMENT *Segment, IN PLARGE_INTEGER MaximumSize, IN ULONG ProtectionMask, IN ULONG AllocationAttributes)
 
NTSTATUS NTAPI MiGetFileObjectForSectionAddress (IN PVOID Address, OUT PFILE_OBJECT *FileObject)
 
PFILE_OBJECT NTAPI MmGetFileObjectForSection (IN PVOID SectionObject)
 
static PFILE_OBJECT MiGetFileObjectForVad (_In_ PMMVAD Vad)
 
VOID NTAPI MmGetImageInformation (OUT PSECTION_IMAGE_INFORMATION ImageInformation)
 
NTSTATUS NTAPI MmGetFileNameForFileObject (IN PFILE_OBJECT FileObject, OUT POBJECT_NAME_INFORMATION *ModuleName)
 
NTSTATUS NTAPI MmGetFileNameForSection (IN PVOID Section, OUT POBJECT_NAME_INFORMATION *ModuleName)
 
NTSTATUS NTAPI MmGetFileNameForAddress (IN PVOID Address, OUT PUNICODE_STRING ModuleName)
 
NTSTATUS NTAPI MiQueryMemorySectionName (IN HANDLE ProcessHandle, IN PVOID BaseAddress, OUT PVOID MemoryInformation, IN SIZE_T MemoryInformationLength, OUT PSIZE_T ReturnLength)
 
VOID NTAPI MiFlushTbAndCapture (IN PMMVAD FoundVad, IN PMMPTE PointerPte, IN ULONG ProtectionMask, IN PMMPFN Pfn1, IN BOOLEAN UpdateDirty)
 
NTSTATUS NTAPI MiSetProtectionOnSection (IN PEPROCESS Process, IN PMMVAD FoundVad, IN PVOID StartingAddress, IN PVOID EndingAddress, IN ULONG NewProtect, OUT PULONG CapturedOldProtect, IN ULONG DontCharge, OUT PULONG Locked)
 
VOID NTAPI MiRemoveMappedPtes (IN PVOID BaseAddress, IN ULONG NumberOfPtes, IN PCONTROL_AREA ControlArea, IN PMMSUPPORT Ws)
 
ULONG NTAPI MiRemoveFromSystemSpace (IN PMMSESSION Session, IN PVOID Base, OUT PCONTROL_AREA *ControlArea)
 
NTSTATUS NTAPI MiUnmapViewInSystemSpace (IN PMMSESSION Session, IN PVOID MappedBase)
 
NTSTATUS NTAPI MmCreateArm3Section (OUT PVOID *SectionObject, IN ACCESS_MASK DesiredAccess, IN POBJECT_ATTRIBUTES ObjectAttributes OPTIONAL, IN PLARGE_INTEGER InputMaximumSize, IN ULONG SectionPageProtection, IN ULONG AllocationAttributes, IN HANDLE FileHandle OPTIONAL, IN PFILE_OBJECT FileObject OPTIONAL)
 
NTSTATUS NTAPI MmMapViewOfArm3Section (IN PVOID SectionObject, IN PEPROCESS Process, IN OUT PVOID *BaseAddress, IN ULONG_PTR ZeroBits, IN SIZE_T CommitSize, IN OUT PLARGE_INTEGER SectionOffset OPTIONAL, IN OUT PSIZE_T ViewSize, IN SECTION_INHERIT InheritDisposition, IN ULONG AllocationType, IN ULONG Protect)
 
BOOLEAN NTAPI MmDisableModifiedWriteOfSection (IN PSECTION_OBJECT_POINTERS SectionObjectPointer)
 
BOOLEAN NTAPI MmForceSectionClosed (IN PSECTION_OBJECT_POINTERS SectionObjectPointer, IN BOOLEAN DelayClose)
 
NTSTATUS NTAPI MmMapViewInSessionSpace (IN PVOID Section, OUT PVOID *MappedBase, IN OUT PSIZE_T ViewSize)
 
NTSTATUS NTAPI MmUnmapViewInSessionSpace (IN PVOID MappedBase)
 
NTSTATUS NTAPI MmUnmapViewOfSection (IN PEPROCESS Process, IN PVOID BaseAddress)
 
NTSTATUS NTAPI MmUnmapViewInSystemSpace (IN PVOID MappedBase)
 
NTSTATUS NTAPI MmCommitSessionMappedView (IN PVOID MappedBase, IN SIZE_T ViewSize)
 
VOID NTAPI MiDeleteARM3Section (PVOID ObjectBody)
 
ULONG NTAPI MmDoesFileHaveUserWritableReferences (IN PSECTION_OBJECT_POINTERS SectionPointer)
 
NTSTATUS NTAPI NtAreMappedFilesTheSame (IN PVOID File1MappedAsAnImage, IN PVOID File2MappedAsFile)
 
NTSTATUS NTAPI NtCreateSection (OUT PHANDLE SectionHandle, IN ACCESS_MASK DesiredAccess, IN POBJECT_ATTRIBUTES ObjectAttributes OPTIONAL, IN PLARGE_INTEGER MaximumSize OPTIONAL, IN ULONG SectionPageProtection OPTIONAL, IN ULONG AllocationAttributes, IN HANDLE FileHandle OPTIONAL)
 
NTSTATUS NTAPI NtOpenSection (OUT PHANDLE SectionHandle, IN ACCESS_MASK DesiredAccess, IN POBJECT_ATTRIBUTES ObjectAttributes)
 
NTSTATUS NTAPI NtMapViewOfSection (IN HANDLE SectionHandle, IN HANDLE ProcessHandle, IN OUT PVOID *BaseAddress, IN ULONG_PTR ZeroBits, IN SIZE_T CommitSize, IN OUT PLARGE_INTEGER SectionOffset OPTIONAL, IN OUT PSIZE_T ViewSize, IN SECTION_INHERIT InheritDisposition, IN ULONG AllocationType, IN ULONG Protect)
 
NTSTATUS NTAPI NtUnmapViewOfSection (IN HANDLE ProcessHandle, IN PVOID BaseAddress)
 
NTSTATUS NTAPI NtExtendSection (IN HANDLE SectionHandle, IN OUT PLARGE_INTEGER NewMaximumSize)
 

Variables

ACCESS_MASK MmMakeSectionAccess [8]
 
ACCESS_MASK MmMakeFileAccess [8]
 
CHAR MmUserProtectionToMask1 [16]
 
CHAR MmUserProtectionToMask2 [16]
 
ULONG MmCompatibleProtectionMask [8]
 
MMSESSION MmSession
 
KGUARDED_MUTEX MmSectionCommitMutex
 
MM_AVL_TABLE MmSectionBasedRoot
 
KGUARDED_MUTEX MmSectionBasedMutex
 
PVOID MmHighSectionBase
 

Macro Definition Documentation

◆ MODULE_INVOLVED_IN_ARM3

#define MODULE_INVOLVED_IN_ARM3

Definition at line 15 of file section.c.

◆ NDEBUG

#define NDEBUG

Definition at line 12 of file section.c.

Function Documentation

◆ MiAddMappedPtes()

static NTSTATUS MiAddMappedPtes ( IN PMMPTE  FirstPte,
IN PFN_NUMBER  PteCount,
IN PCONTROL_AREA  ControlArea,
IN LONGLONG  SectionOffset 
)
static

Definition at line 417 of file section.c.

421 {
422  MMPTE TempPte;
423  PMMPTE PointerPte, ProtoPte, LastProtoPte, LastPte;
424  PSUBSECTION Subsection;
425 
426  /* Mapping at offset not supported yet */
427  ASSERT(SectionOffset == 0);
428 
429  /* ARM3 doesn't support this yet */
430  ASSERT(ControlArea->u.Flags.GlobalOnlyPerSession == 0);
431  ASSERT(ControlArea->u.Flags.Rom == 0);
432  ASSERT(ControlArea->FilePointer == NULL);
433 
434  /* Sanity checks */
435  ASSERT(PteCount != 0);
436  ASSERT(ControlArea->NumberOfMappedViews >= 1);
437  ASSERT(ControlArea->NumberOfUserReferences >= 1);
438  ASSERT(ControlArea->NumberOfSectionReferences != 0);
439  ASSERT(ControlArea->u.Flags.BeingCreated == 0);
440  ASSERT(ControlArea->u.Flags.BeingDeleted == 0);
441  ASSERT(ControlArea->u.Flags.BeingPurged == 0);
442 
443  /* Get the PTEs for the actual mapping */
444  PointerPte = FirstPte;
445  LastPte = FirstPte + PteCount;
446 
447  /* Get the prototype PTEs that desribe the section mapping in the subsection */
448  Subsection = (PSUBSECTION)(ControlArea + 1);
449  ProtoPte = Subsection->SubsectionBase;
450  LastProtoPte = &Subsection->SubsectionBase[Subsection->PtesInSubsection];
451 
452  /* Loop the PTEs for the mapping */
453  while (PointerPte < LastPte)
454  {
455  /* We may have run out of prototype PTEs in this subsection */
456  if (ProtoPte >= LastProtoPte)
457  {
458  /* But we don't handle this yet */
459  ASSERT(FALSE);
460  }
461 
462  /* The PTE should be completely clear */
463  ASSERT(PointerPte->u.Long == 0);
464 
465  /* Build the prototype PTE and write it */
466  MI_MAKE_PROTOTYPE_PTE(&TempPte, ProtoPte);
467  MI_WRITE_INVALID_PTE(PointerPte, TempPte);
468 
469  /* Keep going */
470  PointerPte++;
471  ProtoPte++;
472  }
473 
474  /* No failure path */
475  return STATUS_SUCCESS;
476 }
ASSERT(Segment->Locked)
return FALSE
Definition: section.c:5060
_In_ HANDLE _Outptr_result_bytebuffer_ ViewSize PVOID _In_ ULONG_PTR _In_ SIZE_T _Inout_opt_ PLARGE_INTEGER SectionOffset
Definition: mmfuncs.h:404
HARDWARE_PTE_ARMV6 TempPte
Definition: winldr.c:76
struct _SUBSECTION * PSUBSECTION
ULONG_PTR Long
Definition: mmtypes.h:215
FORCEINLINE VOID MI_WRITE_INVALID_PTE(IN PMMPTE PointerPte, IN MMPTE InvalidPte)
Definition: miarm.h:997
FORCEINLINE VOID MI_MAKE_PROTOTYPE_PTE(IN PMMPTE NewPte, IN PMMPTE PointerPte)
Definition: mm.h:342
#define NULL
Definition: types.h:112
union _MMPTE::@2284 u
#define STATUS_SUCCESS
Definition: shellext.h:65
PMMPTE SubsectionBase
Definition: mmtypes.h:578
ULONG PtesInSubsection
Definition: mmtypes.h:580

Referenced by MiMapViewInSystemSpace().

◆ MiArm3GetCorrectFileAccessMask()

ACCESS_MASK NTAPI MiArm3GetCorrectFileAccessMask ( IN ACCESS_MASK  SectionPageProtection)

Definition at line 140 of file section.c.

141 {
142  ULONG ProtectionMask;
143 
144  /* Calculate the protection mask and make sure it's valid */
146  if (ProtectionMask == MM_INVALID_PROTECTION)
147  {
148  DPRINT1("Invalid protection mask\n");
150  }
151 
152  /* Now convert it to the required file access */
153  return MmMakeFileAccess[ProtectionMask & 0x7];
154 }
#define MM_INVALID_PROTECTION
Definition: miarm.h:67
ACCESS_MASK MmMakeFileAccess[8]
Definition: section.c:32
_In_ ACCESS_MASK _In_opt_ POBJECT_ATTRIBUTES _In_opt_ PLARGE_INTEGER _In_ ULONG SectionPageProtection
Definition: mmfuncs.h:360
ULONG NTAPI MiMakeProtectionMask(IN ULONG Protect)
Definition: section.c:158
#define STATUS_INVALID_PAGE_PROTECTION
Definition: ntstatus.h:305
#define DPRINT1
Definition: precomp.h:8
unsigned int ULONG
Definition: retypes.h:1

◆ MiCheckControlArea()

VOID NTAPI MiCheckControlArea ( IN PCONTROL_AREA  ControlArea,
IN KIRQL  OldIrql 
)

Definition at line 732 of file section.c.

734 {
735  BOOLEAN DeleteSegment = FALSE;
737 
738  /* Check if this is the last reference or view */
739  if (!(ControlArea->NumberOfMappedViews) &&
740  !(ControlArea->NumberOfSectionReferences))
741  {
742  /* There should be no more user references either */
743  ASSERT(ControlArea->NumberOfUserReferences == 0);
744 
745  /* Not yet supported */
746  ASSERT(ControlArea->FilePointer == NULL);
747 
748  /* The control area is being destroyed */
749  ControlArea->u.Flags.BeingDeleted = TRUE;
750  DeleteSegment = TRUE;
751  }
752 
753  /* Release the PFN lock */
754  MiReleasePfnLock(OldIrql);
755 
756  /* Delete the segment if needed */
757  if (DeleteSegment)
758  {
759  /* No more user write references at all */
760  ASSERT(ControlArea->WritableUserReferences == 0);
761  MiSegmentDelete(ControlArea->Segment);
762  }
763 }
#define MI_ASSERT_PFN_LOCK_HELD()
Definition: mm.h:1043
#define TRUE
Definition: types.h:120
ASSERT(Segment->Locked)
unsigned char BOOLEAN
return FALSE
Definition: section.c:5060
VOID NTAPI MiSegmentDelete(IN PSEGMENT Segment)
Definition: section.c:609
_Requires_lock_held_ Interrupt _Releases_lock_ Interrupt _In_ _IRQL_restores_ KIRQL OldIrql
Definition: kefuncs.h:792
#define NULL
Definition: types.h:112

Referenced by MiDeleteARM3Section(), MiDereferenceControlArea(), MiRemoveMappedPtes(), MiRemoveMappedView(), and MmCreateArm3Section().

◆ MiCheckPurgeAndUpMapCount()

NTSTATUS NTAPI MiCheckPurgeAndUpMapCount ( IN PCONTROL_AREA  ControlArea,
IN BOOLEAN  FailIfSystemViews 
)

Definition at line 548 of file section.c.

550 {
551  KIRQL OldIrql;
552 
553  /* Flag not yet supported */
554  ASSERT(FailIfSystemViews == FALSE);
555 
556  /* Lock the PFN database */
557  OldIrql = MiAcquirePfnLock();
558 
559  /* State not yet supported */
560  ASSERT(ControlArea->u.Flags.BeingPurged == 0);
561 
562  /* Increase the reference counts */
563  ControlArea->NumberOfMappedViews++;
564  ControlArea->NumberOfUserReferences++;
565  ASSERT(ControlArea->NumberOfSectionReferences != 0);
566 
567  /* Release the PFN lock and return success */
568  MiReleasePfnLock(OldIrql);
569  return STATUS_SUCCESS;
570 }
UCHAR KIRQL
Definition: env_spec_w32.h:591
ASSERT(Segment->Locked)
return FALSE
Definition: section.c:5060
_Requires_lock_held_ Interrupt _Releases_lock_ Interrupt _In_ _IRQL_restores_ KIRQL OldIrql
Definition: kefuncs.h:792
#define STATUS_SUCCESS
Definition: shellext.h:65

Referenced by MiMapViewInSystemSpace(), and MiMapViewOfDataSection().

◆ MiCreateDataFileMap()

NTSTATUS NTAPI MiCreateDataFileMap ( IN PFILE_OBJECT  File,
OUT PSEGMENT Segment,
IN PSIZE_T  MaximumSize,
IN ULONG  SectionPageProtection,
IN ULONG  AllocationAttributes,
IN ULONG  IgnoreFileSizing 
)

Definition at line 1554 of file section.c.

1560 {
1561  /* Not yet implemented */
1562  ASSERT(FALSE);
1563  *Segment = NULL;
1564  return STATUS_NOT_IMPLEMENTED;
1565 }
return STATUS_NOT_IMPLEMENTED
ASSERT(Segment->Locked)
return FALSE
Definition: section.c:5060
_Inout_ PVOID Segment
Definition: exfuncs.h:1101
#define NULL
Definition: types.h:112

Referenced by MmCreateArm3Section().

◆ MiCreatePagingFileMap()

static NTSTATUS NTAPI MiCreatePagingFileMap ( OUT PSEGMENT Segment,
IN PLARGE_INTEGER  MaximumSize,
IN ULONG  ProtectionMask,
IN ULONG  AllocationAttributes 
)
static

Definition at line 1570 of file section.c.

1574 {
1575  ULONGLONG SizeLimit;
1576  PFN_COUNT PteCount;
1577  PMMPTE PointerPte;
1578  MMPTE TempPte;
1579  PCONTROL_AREA ControlArea;
1580  PSEGMENT NewSegment;
1581  PSUBSECTION Subsection;
1582  PAGED_CODE();
1583 
1584  /* No large pages in ARM3 yet */
1586 
1587  /* Pagefile-backed sections need a known size */
1588  if (!MaximumSize || !MaximumSize->QuadPart || MaximumSize->QuadPart < 0)
1590 
1591  /* Calculate the maximum size possible, given the Prototype PTEs we'll need */
1592  SizeLimit = MmSizeOfPagedPoolInBytes - sizeof(SEGMENT);
1593  SizeLimit /= sizeof(MMPTE);
1594  SizeLimit <<= PAGE_SHIFT;
1595 
1596  /* Fail if this size is too big */
1597  if (MaximumSize->QuadPart > SizeLimit)
1598  {
1599  return STATUS_SECTION_TOO_BIG;
1600  }
1601 
1602  /* Calculate how many Prototype PTEs will be needed */
1603  PteCount = (PFN_COUNT)((MaximumSize->QuadPart + PAGE_SIZE - 1) >> PAGE_SHIFT);
1604 
1605  /* For commited memory, we must have a valid protection mask */
1606  if (AllocationAttributes & SEC_COMMIT) ASSERT(ProtectionMask != 0);
1607 
1608  /* The segment contains all the Prototype PTEs, allocate it in paged pool */
1609  NewSegment = ExAllocatePoolWithTag(PagedPool,
1610  sizeof(SEGMENT) +
1611  sizeof(MMPTE) * (PteCount - 1),
1612  'tSmM');
1613  if (!NewSegment)
1614  {
1616  }
1617  *Segment = NewSegment;
1618 
1619  /* Now allocate the control area, which has the subsection structure */
1620  ControlArea = ExAllocatePoolWithTag(NonPagedPool,
1621  sizeof(CONTROL_AREA) + sizeof(SUBSECTION),
1622  'tCmM');
1623  if (!ControlArea)
1624  {
1625  ExFreePoolWithTag(Segment, 'tSmM');
1627  }
1628 
1629  /* And zero it out, filling the basic segmnet pointer and reference fields */
1630  RtlZeroMemory(ControlArea, sizeof(CONTROL_AREA) + sizeof(SUBSECTION));
1631  ControlArea->Segment = NewSegment;
1632  ControlArea->NumberOfSectionReferences = 1;
1633  ControlArea->NumberOfUserReferences = 1;
1634 
1635  /* Convert allocation attributes to control area flags */
1636  if (AllocationAttributes & SEC_BASED) ControlArea->u.Flags.Based = 1;
1637  if (AllocationAttributes & SEC_RESERVE) ControlArea->u.Flags.Reserve = 1;
1638  if (AllocationAttributes & SEC_COMMIT) ControlArea->u.Flags.Commit = 1;
1639 
1640  /* We just allocated it */
1641  ControlArea->u.Flags.BeingCreated = 1;
1642 
1643  /* The subsection follows, write the mask, PTE count and point back to the CA */
1644  Subsection = (PSUBSECTION)(ControlArea + 1);
1645  Subsection->ControlArea = ControlArea;
1646  Subsection->PtesInSubsection = PteCount;
1647  Subsection->u.SubsectionFlags.Protection = ProtectionMask;
1648 
1649  /* Zero out the segment's prototype PTEs, and link it with the control area */
1650  PointerPte = &NewSegment->ThePtes[0];
1651  RtlZeroMemory(NewSegment, sizeof(SEGMENT));
1652  NewSegment->PrototypePte = PointerPte;
1653  NewSegment->ControlArea = ControlArea;
1654 
1655  /* Save some extra accounting data for the segment as well */
1656  NewSegment->u1.CreatingProcess = PsGetCurrentProcess();
1657  NewSegment->SizeOfSegment = ((ULONGLONG)PteCount) * PAGE_SIZE;
1658  NewSegment->TotalNumberOfPtes = PteCount;
1659  NewSegment->NonExtendedPtes = PteCount;
1660 
1661  /* The subsection's base address is the first Prototype PTE in the segment */
1662  Subsection->SubsectionBase = PointerPte;
1663 
1664  /* Start with an empty PTE, unless this is a commit operation */
1665  TempPte.u.Long = 0;
1667  {
1668  /* In which case, write down the protection mask in the Prototype PTEs */
1669  TempPte.u.Soft.Protection = ProtectionMask;
1670 
1671  /* For accounting, also mark these pages as being committed */
1672  NewSegment->NumberOfCommittedPages = PteCount;
1673  }
1674 
1675  /* The template PTE itself for the segment should also have the mask set */
1676  NewSegment->SegmentPteTemplate.u.Soft.Protection = ProtectionMask;
1677 
1678  /* Write out the prototype PTEs, for now they're simply demand zero */
1679 #ifdef _WIN64
1680  RtlFillMemoryUlonglong(PointerPte, PteCount * sizeof(MMPTE), TempPte.u.Long);
1681 #else
1682  RtlFillMemoryUlong(PointerPte, PteCount * sizeof(MMPTE), TempPte.u.Long);
1683 #endif
1684  return STATUS_SUCCESS;
1685 }
#define PAGE_SHIFT
Definition: env_spec_w32.h:45
ULONG NumberOfCommittedPages
Definition: mmtypes.h:412
#define STATUS_INSUFFICIENT_RESOURCES
Definition: udferr_usr.h:158
#define SEC_LARGE_PAGES
Definition: mmtypes.h:102
ULONGLONG SizeOfSegment
Definition: mmtypes.h:410
_In_ ACCESS_MASK _In_opt_ POBJECT_ATTRIBUTES _In_opt_ PLARGE_INTEGER _In_ ULONG _In_ ULONG AllocationAttributes
Definition: mmfuncs.h:360
ULONG NumberOfSectionReferences
Definition: mmtypes.h:520
union _CONTROL_AREA::@2558 u
ULONG NonExtendedPtes
Definition: mmtypes.h:408
ULONG PFN_COUNT
Definition: mmtypes.h:102
PCONTROL_AREA ControlArea
Definition: mmtypes.h:570
MMPTE ThePtes[1]
Definition: mmtypes.h:427
ULONG TotalNumberOfPtes
Definition: mmtypes.h:407
SIZE_T MmSizeOfPagedPoolInBytes
Definition: miarm.h:590
struct _CONTROL_AREA * ControlArea
Definition: mmtypes.h:406
#define SEC_BASED
PEPROCESS CreatingProcess
Definition: mmtypes.h:419
ASSERT(Segment->Locked)
#define SEC_COMMIT
Definition: mmtypes.h:99
union _SEGMENT::@2556 u1
#define SEC_RESERVE
Definition: nt_native.h:1323
#define PsGetCurrentProcess
Definition: psfuncs.h:17
#define STATUS_SECTION_TOO_BIG
Definition: ntstatus.h:300
ULONG64 Protection
Definition: mmtypes.h:88
_Inout_ PVOID Segment
Definition: exfuncs.h:1101
#define RtlFillMemoryUlong(dst, len, val)
Definition: mkhive.h:55
uint64_t ULONGLONG
Definition: typedefs.h:67
HARDWARE_PTE_ARMV6 TempPte
Definition: winldr.c:76
union _SUBSECTION::@2560 u
#define ExAllocatePoolWithTag(hernya, size, tag)
Definition: env_spec_w32.h:350
struct _SUBSECTION * PSUBSECTION
struct _SEGMENT SEGMENT
#define PAGE_SIZE
Definition: env_spec_w32.h:49
MMSUBSECTION_FLAGS SubsectionFlags
Definition: mmtypes.h:574
PSEGMENT Segment
Definition: mmtypes.h:518
ULONG NumberOfUserReferences
Definition: mmtypes.h:524
MMPTE_SOFTWARE Soft
Definition: mmtypes.h:219
struct _MMPTE MMPTE
_In_ ACCESS_MASK _In_opt_ POBJECT_ATTRIBUTES _In_opt_ PLARGE_INTEGER MaximumSize
Definition: mmfuncs.h:360
MMPTE SegmentPteTemplate
Definition: mmtypes.h:411
MMSECTION_FLAGS Flags
Definition: mmtypes.h:528
#define RtlZeroMemory(Destination, Length)
Definition: typedefs.h:262
union _MMPTE::@2284 u
#define STATUS_SUCCESS
Definition: shellext.h:65
#define STATUS_INVALID_PARAMETER_4
Definition: ntstatus.h:478
#define ExFreePoolWithTag(_P, _T)
Definition: module.h:1099
PMMPTE PrototypePte
Definition: mmtypes.h:426
PMMPTE SubsectionBase
Definition: mmtypes.h:578
ULONG BeingCreated
Definition: mmtypes.h:461
NTSYSAPI VOID NTAPI RtlFillMemoryUlonglong(_Out_writes_bytes_all_(Length) PVOID Destination, _In_ SIZE_T Length, _In_ ULONGLONG Pattern)
#define PAGED_CODE()
ULONG PtesInSubsection
Definition: mmtypes.h:580

Referenced by MmCreateArm3Section().

◆ MiDeleteARM3Section()

VOID NTAPI MiDeleteARM3Section ( PVOID  ObjectBody)

Definition at line 3329 of file section.c.

3330 {
3332  PCONTROL_AREA ControlArea;
3333  KIRQL OldIrql;
3334 
3335  SectionObject = (PSECTION)ObjectBody;
3336 
3337  if (SectionObject->u.Flags.Based == 1)
3338  {
3339  /* Remove the node from the global section address tree */
3343  }
3344 
3345  /* Lock the PFN database */
3346  OldIrql = MiAcquirePfnLock();
3347 
3348  ASSERT(SectionObject->Segment);
3349  ASSERT(SectionObject->Segment->ControlArea);
3350 
3351  ControlArea = SectionObject->Segment->ControlArea;
3352 
3353  /* Dereference */
3354  ControlArea->NumberOfSectionReferences--;
3355  ControlArea->NumberOfUserReferences--;
3356 
3357  ASSERT(ControlArea->u.Flags.BeingDeleted == 0);
3358 
3359  /* Check it. It will delete it if there is no more reference to it */
3360  MiCheckControlArea(ControlArea, OldIrql);
3361 }
_Must_inspect_result_ _Outptr_ PVOID * SectionObject
Definition: fsrtlfuncs.h:860
ULONG NumberOfSectionReferences
Definition: mmtypes.h:520
union _CONTROL_AREA::@2558 u
VOID FASTCALL KeAcquireGuardedMutex(IN PKGUARDED_MUTEX GuardedMutex)
Definition: gmutex.c:42
KGUARDED_MUTEX MmSectionBasedMutex
Definition: section.c:110
MM_AVL_TABLE MmSectionBasedRoot
Definition: section.c:109
UCHAR KIRQL
Definition: env_spec_w32.h:591
ASSERT(Segment->Locked)
struct _SECTION * PSECTION
_Requires_lock_held_ Interrupt _Releases_lock_ Interrupt _In_ _IRQL_restores_ KIRQL OldIrql
Definition: kefuncs.h:792
VOID NTAPI MiRemoveNode(IN PMMADDRESS_NODE Node, IN PMM_AVL_TABLE Table)
Definition: vadnode.c:360
ULONG BeingDeleted
Definition: mmtypes.h:460
ULONG NumberOfUserReferences
Definition: mmtypes.h:524
VOID NTAPI MiCheckControlArea(IN PCONTROL_AREA ControlArea, IN KIRQL OldIrql)
Definition: section.c:732
VOID FASTCALL KeReleaseGuardedMutex(IN OUT PKGUARDED_MUTEX GuardedMutex)
Definition: gmutex.c:53
MMSECTION_FLAGS Flags
Definition: mmtypes.h:528

Referenced by MmpDeleteSection().

◆ MiDereferenceControlArea()

VOID NTAPI MiDereferenceControlArea ( IN PCONTROL_AREA  ControlArea)

Definition at line 767 of file section.c.

768 {
769  KIRQL OldIrql;
770 
771  /* Lock the PFN database */
772  OldIrql = MiAcquirePfnLock();
773 
774  /* Drop reference counts */
775  ControlArea->NumberOfMappedViews--;
776  ControlArea->NumberOfUserReferences--;
777 
778  /* Check if it's time to delete the CA. This releases the lock */
779  MiCheckControlArea(ControlArea, OldIrql);
780 }
UCHAR KIRQL
Definition: env_spec_w32.h:591
_Requires_lock_held_ Interrupt _Releases_lock_ Interrupt _In_ _IRQL_restores_ KIRQL OldIrql
Definition: kefuncs.h:792
VOID NTAPI MiCheckControlArea(IN PCONTROL_AREA ControlArea, IN KIRQL OldIrql)
Definition: section.c:732

Referenced by MiMapViewInSystemSpace(), and MiMapViewOfDataSection().

◆ MiFillSystemPageDirectory()

VOID NTAPI MiFillSystemPageDirectory ( IN PVOID  Base,
IN SIZE_T  NumberOfBytes 
)

Definition at line 480 of file section.c.

482 {
483  PMMPDE PointerPde, LastPde, SystemMapPde;
484  MMPDE TempPde;
485  PFN_NUMBER PageFrameIndex, ParentPage;
486  KIRQL OldIrql;
487  PAGED_CODE();
488 
489  /* Find the PDEs needed for this mapping */
490  PointerPde = MiAddressToPde(Base);
491  LastPde = MiAddressToPde((PVOID)((ULONG_PTR)Base + NumberOfBytes - 1));
492 
493 #if (_MI_PAGING_LEVELS == 2)
494  /* Find the system double-mapped PDE that describes this mapping */
495  SystemMapPde = &MmSystemPagePtes[((ULONG_PTR)PointerPde & (SYSTEM_PD_SIZE - 1)) / sizeof(MMPTE)];
496 #else
497  /* We don't have a double mapping */
498  SystemMapPde = PointerPde;
499 #endif
500 
501  /* Use the PDE template and loop the PDEs */
503  while (PointerPde <= LastPde)
504  {
505  /* Lock the PFN database */
506  OldIrql = MiAcquirePfnLock();
507 
508  /* Check if we don't already have this PDE mapped */
509  if (SystemMapPde->u.Hard.Valid == 0)
510  {
511  /* Grab a page for it */
513  MI_SET_PROCESS2(PsGetCurrentProcess()->ImageFileName);
514  PageFrameIndex = MiRemoveZeroPage(MI_GET_NEXT_COLOR());
515  ASSERT(PageFrameIndex);
516  TempPde.u.Hard.PageFrameNumber = PageFrameIndex;
517 
518 #if (_MI_PAGING_LEVELS == 2)
519  ParentPage = MmSystemPageDirectory[(PointerPde - MiAddressToPde(NULL)) / PDE_PER_PAGE];
520 #else
521  ParentPage = MiPdeToPpe(PointerPde)->u.Hard.PageFrameNumber;
522 #endif
523  /* Initialize its PFN entry, with the parent system page directory page table */
524  MiInitializePfnForOtherProcess(PageFrameIndex,
525  (PMMPTE)PointerPde,
526  ParentPage);
527 
528  /* Make the system PDE entry valid */
529  MI_WRITE_VALID_PDE(SystemMapPde, TempPde);
530 
531  /* The system PDE entry might be the PDE itself, so check for this */
532  if (PointerPde->u.Hard.Valid == 0)
533  {
534  /* It's different, so make the real PDE valid too */
535  MI_WRITE_VALID_PDE(PointerPde, TempPde);
536  }
537  }
538 
539  /* Release the lock and keep going with the next PDE */
540  MiReleasePfnLock(OldIrql);
541  SystemMapPde++;
542  PointerPde++;
543  }
544 }
#define PDE_PER_PAGE
Definition: mm.h:21
#define MiAddressToPde(x)
Definition: mmx86.c:20
_In_opt_ ULONG Base
Definition: rtlfuncs.h:2413
#define MI_GET_NEXT_COLOR()
Definition: miarm.h:237
HARDWARE_PDE_ARMV6 TempPde
Definition: winldr.c:78
VOID NTAPI MiInitializePfnForOtherProcess(IN PFN_NUMBER PageFrameIndex, IN PVOID PteAddress, IN PFN_NUMBER PteFrame)
Definition: pfnlist.c:1282
PFN_NUMBER NTAPI MiRemoveZeroPage(IN ULONG Color)
Definition: pfnlist.c:533
uint32_t ULONG_PTR
Definition: typedefs.h:65
UCHAR KIRQL
Definition: env_spec_w32.h:591
ASSERT(Segment->Locked)
ULONG PFN_NUMBER
Definition: ke.h:9
#define MI_SET_PROCESS2(x)
Definition: mm.h:319
#define PsGetCurrentProcess
Definition: psfuncs.h:17
PFN_NUMBER MmSystemPageDirectory[PPE_PER_PAGE]
Definition: init.c:40
FORCEINLINE VOID MI_WRITE_VALID_PDE(IN PMMPDE PointerPde, IN MMPDE TempPde)
Definition: miarm.h:1023
#define MI_SET_USAGE(x)
Definition: mm.h:317
PMMPDE MmSystemPagePtes
Definition: init.c:41
ULONG PageFrameNumber
Definition: mmtypes.h:74
ULONG64 Valid
Definition: mmtypes.h:150
_Requires_lock_held_ Interrupt _Releases_lock_ Interrupt _In_ _IRQL_restores_ KIRQL OldIrql
Definition: kefuncs.h:792
MMPTE ValidKernelPde
Definition: init.c:28
MMPTE_HARDWARE Hard
Definition: mmtypes.h:217
#define SYSTEM_PD_SIZE
Definition: miarm.h:32
FORCEINLINE PMMPDE MiPdeToPpe(PMMPDE PointerPde)
Definition: mm.h:292
_Must_inspect_result_ typedef _In_ PHYSICAL_ADDRESS _Inout_ PLARGE_INTEGER NumberOfBytes
Definition: iotypes.h:1035
#define NULL
Definition: types.h:112
#define ULONG_PTR
Definition: config.h:101
ULONG64 PageFrameNumber
Definition: mmtypes.h:171
union _MMPTE::@2284 u
#define PAGED_CODE()

Referenced by MiMapViewInSystemSpace(), and MmCreateVirtualMappingUnsafe().

◆ MiFlushTbAndCapture()

VOID NTAPI MiFlushTbAndCapture ( IN PMMVAD  FoundVad,
IN PMMPTE  PointerPte,
IN ULONG  ProtectionMask,
IN PMMPFN  Pfn1,
IN BOOLEAN  UpdateDirty 
)

Definition at line 2033 of file section.c.

2038 {
2039  MMPTE TempPte, PreviousPte;
2040  KIRQL OldIrql;
2041  BOOLEAN RebuildPte = FALSE;
2042 
2043  //
2044  // User for sanity checking later on
2045  //
2046  PreviousPte = *PointerPte;
2047 
2048  //
2049  // Build the PTE and acquire the PFN lock
2050  //
2052  PointerPte,
2053  ProtectionMask,
2054  PreviousPte.u.Hard.PageFrameNumber);
2055  OldIrql = MiAcquirePfnLock();
2056 
2057  //
2058  // We don't support I/O mappings in this path yet
2059  //
2060  ASSERT(Pfn1 != NULL);
2061  ASSERT(Pfn1->u3.e1.CacheAttribute != MiWriteCombined);
2062 
2063  //
2064  // Make sure new protection mask doesn't get in conflict and fix it if it does
2065  //
2066  if (Pfn1->u3.e1.CacheAttribute == MiCached)
2067  {
2068  //
2069  // This is a cached PFN
2070  //
2071  if (ProtectionMask & (MM_NOCACHE | MM_NOACCESS))
2072  {
2073  RebuildPte = TRUE;
2074  ProtectionMask &= ~(MM_NOCACHE | MM_NOACCESS);
2075  }
2076  }
2077  else if (Pfn1->u3.e1.CacheAttribute == MiNonCached)
2078  {
2079  //
2080  // This is a non-cached PFN
2081  //
2082  if ((ProtectionMask & (MM_NOCACHE | MM_NOACCESS)) != MM_NOCACHE)
2083  {
2084  RebuildPte = TRUE;
2085  ProtectionMask &= ~MM_NOACCESS;
2086  ProtectionMask |= MM_NOCACHE;
2087  }
2088  }
2089 
2090  if (RebuildPte)
2091  {
2093  PointerPte,
2094  ProtectionMask,
2095  PreviousPte.u.Hard.PageFrameNumber);
2096  }
2097 
2098  //
2099  // Write the new PTE, making sure we are only changing the bits
2100  //
2101  MI_UPDATE_VALID_PTE(PointerPte, TempPte);
2102 
2103  //
2104  // Flush the TLB
2105  //
2106  ASSERT(PreviousPte.u.Hard.Valid == 1);
2107  KeFlushCurrentTb();
2108  ASSERT(PreviousPte.u.Hard.Valid == 1);
2109 
2110  //
2111  // Windows updates the relevant PFN1 information, we currently don't.
2112  //
2113  if (UpdateDirty && PreviousPte.u.Hard.Dirty)
2114  {
2115  if (!Pfn1->u3.e1.Modified)
2116  {
2117  DPRINT1("FIXME: Mark PFN as dirty\n");
2118  }
2119  }
2120 
2121  //
2122  // Not supported in ARM3
2123  //
2124  ASSERT(FoundVad->u.VadFlags.VadType != VadWriteWatch);
2125 
2126  //
2127  // Release the PFN lock, we are done
2128  //
2129  MiReleasePfnLock(OldIrql);
2130 }
#define TRUE
Definition: types.h:120
#define MM_NOACCESS
Definition: miarm.h:65
#define MM_NOCACHE
Definition: miarm.h:56
ULONG64 Dirty
Definition: mmtypes.h:164
UCHAR KIRQL
Definition: env_spec_w32.h:591
ASSERT(Segment->Locked)
unsigned char BOOLEAN
return FALSE
Definition: section.c:5060
ULONG64 Valid
Definition: mmtypes.h:150
HARDWARE_PTE_ARMV6 TempPte
Definition: winldr.c:76
_Requires_lock_held_ Interrupt _Releases_lock_ Interrupt _In_ _IRQL_restores_ KIRQL OldIrql
Definition: kefuncs.h:792
FORCEINLINE VOID MI_MAKE_HARDWARE_PTE_USER(IN PMMPTE NewPte, IN PMMPTE MappingPte, IN ULONG_PTR ProtectionMask, IN PFN_NUMBER PageFrameNumber)
Definition: miarm.h:832
MMPTE_HARDWARE Hard
Definition: mmtypes.h:217
#define NULL
Definition: types.h:112
#define DPRINT1
Definition: precomp.h:8
ULONG64 PageFrameNumber
Definition: mmtypes.h:171
union _MMPTE::@2284 u
FORCEINLINE VOID MI_UPDATE_VALID_PTE(IN PMMPTE PointerPte, IN MMPTE TempPte)
Definition: miarm.h:982
VOID NTAPI KeFlushCurrentTb(VOID)
Definition: cpu.c:347

Referenced by MiProtectVirtualMemory(), and MiSetProtectionOnSection().

◆ MiGetFileObjectForSectionAddress()

NTSTATUS NTAPI MiGetFileObjectForSectionAddress ( IN PVOID  Address,
OUT PFILE_OBJECT FileObject 
)

Definition at line 1689 of file section.c.

1692 {
1693  PMMVAD Vad;
1694  PCONTROL_AREA ControlArea;
1695 
1696  /* Get the VAD */
1697  Vad = MiLocateAddress(Address);
1698  if (Vad == NULL)
1699  {
1700  /* Fail, the address does not exist */
1701  DPRINT1("Invalid address\n");
1702  return STATUS_INVALID_ADDRESS;
1703  }
1704 
1705  /* Check if this is a RosMm memory area */
1706  if (Vad->u.VadFlags.Spare != 0)
1707  {
1709 
1710  /* Check if it's a section view (RosMm section) */
1712  {
1713  /* Get the section pointer to the SECTION_OBJECT */
1714  *FileObject = MemoryArea->SectionData.Segment->FileObject;
1715  }
1716  else
1717  {
1718 #ifdef NEWCC
1719  ASSERT(MemoryArea->Type == MEMORY_AREA_CACHE);
1720  DPRINT1("Address is a cache section!\n");
1721  return STATUS_SECTION_NOT_IMAGE;
1722 #else
1723  ASSERT(FALSE);
1724  return STATUS_SECTION_NOT_IMAGE;
1725 #endif
1726  }
1727  }
1728  else
1729  {
1730  /* Make sure it's not a VM VAD */
1731  if (Vad->u.VadFlags.PrivateMemory == 1)
1732  {
1733  DPRINT1("Address is not a section\n");
1734  return STATUS_SECTION_NOT_IMAGE;
1735  }
1736 
1737  /* Get the control area */
1738  ControlArea = Vad->ControlArea;
1739  if (!(ControlArea) || !(ControlArea->u.Flags.Image))
1740  {
1741  DPRINT1("Address is not a section\n");
1742  return STATUS_SECTION_NOT_IMAGE;
1743  }
1744 
1745  /* Get the file object */
1746  *FileObject = ControlArea->FilePointer;
1747  }
1748 
1749  /* Return success */
1750  return STATUS_SUCCESS;
1751 }
PFILE_OBJECT FilePointer
Definition: mmtypes.h:530
ULONG Type
Definition: mm.h:251
struct _MEMORY_AREA * PMEMORY_AREA
union _CONTROL_AREA::@2558 u
MMVAD_FLAGS VadFlags
Definition: mmtypes.h:731
ASSERT(Segment->Locked)
PCONTROL_AREA ControlArea
Definition: mmtypes.h:733
PMMVAD NTAPI MiLocateAddress(IN PVOID VirtualAddress)
Definition: vadnode.c:48
static WCHAR Address[46]
Definition: ping.c:68
return FALSE
Definition: section.c:5060
#define MEMORY_AREA_SECTION_VIEW
Definition: mm.h:93
_In_ WDFREQUEST _In_ WDFFILEOBJECT FileObject
Definition: wdfdevice.h:547
ULONG_PTR PrivateMemory
Definition: mmtypes.h:695
#define STATUS_SECTION_NOT_IMAGE
Definition: ntstatus.h:309
#define STATUS_INVALID_ADDRESS
Definition: ntstatus.h:557
#define NULL
Definition: types.h:112
union _MMVAD::@2565 u
#define DPRINT1
Definition: precomp.h:8
ULONG_PTR Spare
Definition: mmtypes.h:694
MMSECTION_FLAGS Flags
Definition: mmtypes.h:528
#define STATUS_SUCCESS
Definition: shellext.h:65
struct _MEMORY_AREA::@1750 SectionData

◆ MiGetFileObjectForVad()

static PFILE_OBJECT MiGetFileObjectForVad ( _In_ PMMVAD  Vad)
static

Definition at line 1774 of file section.c.

1776 {
1777  PCONTROL_AREA ControlArea;
1779 
1780  /* Check if this is a RosMm memory area */
1781  if (Vad->u.VadFlags.Spare != 0)
1782  {
1784 
1785  /* Check if it's a section view (RosMm section) */
1787  {
1788  /* Get the section pointer to the SECTION_OBJECT */
1789  FileObject = MemoryArea->SectionData.Segment->FileObject;
1790  }
1791  else
1792  {
1793 #ifdef NEWCC
1794  ASSERT(MemoryArea->Type == MEMORY_AREA_CACHE);
1795  DPRINT1("VAD is a cache section!\n");
1796 #else
1797  ASSERT(FALSE);
1798 #endif
1799  return NULL;
1800  }
1801  }
1802  else
1803  {
1804  /* Make sure it's not a VM VAD */
1805  if (Vad->u.VadFlags.PrivateMemory == 1)
1806  {
1807  DPRINT1("VAD is not a section\n");
1808  return NULL;
1809  }
1810 
1811  /* Get the control area */
1812  ControlArea = Vad->ControlArea;
1813  if ((ControlArea == NULL) || !ControlArea->u.Flags.Image)
1814  {
1815  DPRINT1("Address is not a section\n");
1816  return NULL;
1817  }
1818 
1819  /* Get the file object */
1820  FileObject = ControlArea->FilePointer;
1821  }
1822 
1823  /* Return the file object */
1824  return FileObject;
1825 }
PFILE_OBJECT FilePointer
Definition: mmtypes.h:530
ULONG Type
Definition: mm.h:251
struct _MEMORY_AREA * PMEMORY_AREA
union _CONTROL_AREA::@2558 u
ASSERT(Segment->Locked)
return FALSE
Definition: section.c:5060
#define MEMORY_AREA_SECTION_VIEW
Definition: mm.h:93
_In_ WDFREQUEST _In_ WDFFILEOBJECT FileObject
Definition: wdfdevice.h:547
* PFILE_OBJECT
Definition: iotypes.h:1998
#define NULL
Definition: types.h:112
#define DPRINT1
Definition: precomp.h:8
MMSECTION_FLAGS Flags
Definition: mmtypes.h:528
struct _MEMORY_AREA::@1750 SectionData

Referenced by MmGetFileNameForAddress(), and NtAreMappedFilesTheSame().

◆ MiInitializeSystemSpaceMap()

BOOLEAN NTAPI MiInitializeSystemSpaceMap ( IN PMMSESSION InputSession  OPTIONAL)

Definition at line 240 of file section.c.

241 {
242  SIZE_T AllocSize, BitmapSize, Size;
243  PVOID ViewStart;
244  PMMSESSION Session;
245 
246  /* Check if this a session or system space */
247  if (InputSession)
248  {
249  /* Use the input session */
250  Session = InputSession;
251  ViewStart = MiSessionViewStart;
253  }
254  else
255  {
256  /* Use the system space "session" */
257  Session = &MmSession;
258  ViewStart = MiSystemViewStart;
260  }
261 
262  /* Initialize the system space lock */
263  Session->SystemSpaceViewLockPointer = &Session->SystemSpaceViewLock;
265 
266  /* Set the start address */
267  Session->SystemSpaceViewStart = ViewStart;
268 
269  /* Create a bitmap to describe system space */
270  BitmapSize = sizeof(RTL_BITMAP) + ((((Size / MI_SYSTEM_VIEW_BUCKET_SIZE) + 31) / 32) * sizeof(ULONG));
272  BitmapSize,
273  TAG_MM);
274  ASSERT(Session->SystemSpaceBitMap);
276  (PULONG)(Session->SystemSpaceBitMap + 1),
278 
279  /* Set system space fully empty to begin with */
281 
282  /* Set default hash flags */
283  Session->SystemSpaceHashSize = 31;
284  Session->SystemSpaceHashKey = Session->SystemSpaceHashSize - 1;
285  Session->SystemSpaceHashEntries = 0;
286 
287  /* Calculate how much space for the hash views we'll need */
288  AllocSize = sizeof(MMVIEW) * Session->SystemSpaceHashSize;
289  ASSERT(AllocSize < PAGE_SIZE);
290 
291  /* Allocate and zero the view table */
292  Session->SystemSpaceViewTable = ExAllocatePoolWithTag(Session == &MmSession ?
293  NonPagedPool :
294  PagedPool,
295  AllocSize,
296  TAG_MM);
297  ASSERT(Session->SystemSpaceViewTable != NULL);
298  RtlZeroMemory(Session->SystemSpaceViewTable, AllocSize);
299 
300  /* Success */
301  return TRUE;
302 }
struct _RTL_BITMAP RTL_BITMAP
#define TRUE
Definition: types.h:120
NTSYSAPI void WINAPI RtlInitializeBitMap(PRTL_BITMAP, PULONG, ULONG)
IN PVOID IN PVOID IN USHORT IN USHORT Size
Definition: pci.h:361
PCHAR SystemSpaceViewStart
Definition: miarm.h:457
ULONG SystemSpaceHashEntries
Definition: miarm.h:460
KGUARDED_MUTEX SystemSpaceViewLock
Definition: miarm.h:455
ASSERT(Segment->Locked)
#define TAG_MM
Definition: tag.h:110
ULONG MmSystemViewSize
Definition: init.c:39
ULONG MmSessionViewSize
Definition: init.c:35
PVOID MiSystemViewStart
Definition: init.c:38
PMMVIEW SystemSpaceViewTable
Definition: miarm.h:458
ULONG SystemSpaceHashKey
Definition: miarm.h:461
struct _MMVIEW MMVIEW
#define ExAllocatePoolWithTag(hernya, size, tag)
Definition: env_spec_w32.h:350
PKGUARDED_MUTEX SystemSpaceViewLockPointer
Definition: miarm.h:456
#define PAGE_SIZE
Definition: env_spec_w32.h:49
ULONG_PTR SIZE_T
Definition: typedefs.h:80
VOID FASTCALL KeInitializeGuardedMutex(OUT PKGUARDED_MUTEX GuardedMutex)
Definition: gmutex.c:31
PRTL_BITMAP SystemSpaceBitMap
Definition: miarm.h:463
PVOID MiSessionViewStart
Definition: init.c:30
#define MI_SYSTEM_VIEW_BUCKET_SIZE
Definition: miarm.h:266
unsigned int * PULONG
Definition: retypes.h:1
#define NULL
Definition: types.h:112
NTSYSAPI void WINAPI RtlClearAllBits(PRTL_BITMAP)
unsigned int ULONG
Definition: retypes.h:1
#define RtlZeroMemory(Destination, Length)
Definition: typedefs.h:262
ULONG SystemSpaceHashSize
Definition: miarm.h:459
MMSESSION MmSession
Definition: section.c:107

Referenced by MiBuildPagedPool(), and MiSessionCreateInternal().

◆ MiInsertInSystemSpace()

PVOID NTAPI MiInsertInSystemSpace ( IN PMMSESSION  Session,
IN ULONG  Buckets,
IN PCONTROL_AREA  ControlArea 
)

Definition at line 306 of file section.c.

309 {
310  PVOID Base;
311  ULONG Entry, Hash, i, HashSize;
312  PMMVIEW OldTable;
313  PAGED_CODE();
314 
315  /* Stay within 4GB */
317 
318  /* Lock system space */
319  KeAcquireGuardedMutex(Session->SystemSpaceViewLockPointer);
320 
321  /* Check if we're going to exhaust hash entries */
322  if ((Session->SystemSpaceHashEntries + 8) > Session->SystemSpaceHashSize)
323  {
324  /* Double the hash size */
325  HashSize = Session->SystemSpaceHashSize * 2;
326 
327  /* Save the old table and allocate a new one */
328  OldTable = Session->SystemSpaceViewTable;
329  Session->SystemSpaceViewTable = ExAllocatePoolWithTag(Session ==
330  &MmSession ?
331  NonPagedPool :
332  PagedPool,
333  HashSize *
334  sizeof(MMVIEW),
335  TAG_MM);
336  if (!Session->SystemSpaceViewTable)
337  {
338  /* Failed to allocate a new table, keep the old one for now */
339  Session->SystemSpaceViewTable = OldTable;
340  }
341  else
342  {
343  /* Clear the new table and set the new ahsh and key */
344  RtlZeroMemory(Session->SystemSpaceViewTable, HashSize * sizeof(MMVIEW));
345  Session->SystemSpaceHashSize = HashSize;
346  Session->SystemSpaceHashKey = Session->SystemSpaceHashSize - 1;
347 
348  /* Loop the old table */
349  for (i = 0; i < Session->SystemSpaceHashSize / 2; i++)
350  {
351  /* Check if the entry was valid */
352  if (OldTable[i].Entry)
353  {
354  /* Re-hash the old entry and search for space in the new table */
355  Hash = (OldTable[i].Entry >> 16) % Session->SystemSpaceHashKey;
356  while (Session->SystemSpaceViewTable[Hash].Entry)
357  {
358  /* Loop back at the beginning if we had an overflow */
359  if (++Hash >= Session->SystemSpaceHashSize) Hash = 0;
360  }
361 
362  /* Write the old entry in the new table */
363  Session->SystemSpaceViewTable[Hash] = OldTable[i];
364  }
365  }
366 
367  /* Free the old table */
368  ExFreePool(OldTable);
369  }
370  }
371 
372  /* Check if we ran out */
373  if (Session->SystemSpaceHashEntries == Session->SystemSpaceHashSize)
374  {
375  DPRINT1("Ran out of system view hash entries\n");
376  KeReleaseGuardedMutex(Session->SystemSpaceViewLockPointer);
377  return NULL;
378  }
379 
380  /* Find space where to map this view */
381  i = RtlFindClearBitsAndSet(Session->SystemSpaceBitMap, Buckets, 0);
382  if (i == 0xFFFFFFFF)
383  {
384  /* Out of space, fail */
385  Session->BitmapFailures++;
386  DPRINT1("Out of system view space\n");
387  KeReleaseGuardedMutex(Session->SystemSpaceViewLockPointer);
388  return NULL;
389  }
390 
391  /* Compute the base address */
392  Base = (PVOID)((ULONG_PTR)Session->SystemSpaceViewStart + (i * MI_SYSTEM_VIEW_BUCKET_SIZE));
393 
394  /* Get the hash entry for this allocation */
395  Entry = ((ULONG_PTR)Base & ~(MI_SYSTEM_VIEW_BUCKET_SIZE - 1)) + Buckets;
396  Hash = (Entry >> 16) % Session->SystemSpaceHashKey;
397 
398  /* Loop hash entries until a free one is found */
399  while (Session->SystemSpaceViewTable[Hash].Entry)
400  {
401  /* Unless we overflow, in which case loop back at hash o */
402  if (++Hash >= Session->SystemSpaceHashSize) Hash = 0;
403  }
404 
405  /* Add this entry into the hash table */
406  Session->SystemSpaceViewTable[Hash].Entry = Entry;
407  Session->SystemSpaceViewTable[Hash].ControlArea = ControlArea;
408 
409  /* Hash entry found, increment total and return the base address */
410  Session->SystemSpaceHashEntries++;
411  KeReleaseGuardedMutex(Session->SystemSpaceViewLockPointer);
412  return Base;
413 }
while(CdLookupNextInitialFileDirent(IrpContext, Fcb, FileContext))
static int Hash(const char *)
Definition: reader.c:2257
VOID FASTCALL KeAcquireGuardedMutex(IN PKGUARDED_MUTEX GuardedMutex)
Definition: gmutex.c:42
_In_opt_ ULONG Base
Definition: rtlfuncs.h:2413
uint32_t ULONG_PTR
Definition: typedefs.h:65
ASSERT(Segment->Locked)
#define TAG_MM
Definition: tag.h:110
Entry
Definition: section.c:4944
NTSYSAPI ULONG WINAPI RtlFindClearBitsAndSet(PRTL_BITMAP, ULONG, ULONG)
void * PVOID
Definition: retypes.h:9
#define ExAllocatePoolWithTag(hernya, size, tag)
Definition: env_spec_w32.h:350
GLsizei GLenum const GLvoid GLsizei GLenum GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLint GLint GLint GLshort GLshort GLshort GLubyte GLubyte GLubyte GLuint GLuint GLuint GLushort GLushort GLushort GLbyte GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLfloat GLint GLint GLint GLint GLshort GLshort GLshort GLshort GLubyte GLubyte GLubyte GLubyte GLuint GLuint GLuint GLuint GLushort GLushort GLushort GLushort GLboolean const GLdouble const GLfloat const GLint const GLshort const GLbyte const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLdouble const GLfloat const GLfloat const GLint const GLint const GLshort const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort GLenum GLenum GLenum GLfloat GLenum GLint GLenum GLenum GLenum GLfloat GLenum GLenum GLint GLenum GLfloat GLenum GLint GLint GLushort GLenum GLenum GLfloat GLenum GLenum GLint GLfloat const GLubyte GLenum GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLint GLint GLsizei GLsizei GLint GLenum GLenum const GLvoid GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLenum const GLdouble GLenum GLenum const GLfloat GLenum GLenum const GLint GLsizei GLuint GLfloat GLuint GLbitfield GLfloat GLint GLuint GLboolean GLenum GLfloat GLenum GLbitfield GLenum GLfloat GLfloat GLint GLint const GLfloat GLenum GLfloat GLfloat GLint GLint GLfloat GLfloat GLint GLint const GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat const GLdouble const GLfloat const GLdouble const GLfloat GLint i
Definition: glfuncs.h:248
#define MI_SYSTEM_VIEW_BUCKET_SIZE
Definition: miarm.h:266
Definition: miarm.h:447
#define NULL
Definition: types.h:112
VOID FASTCALL KeReleaseGuardedMutex(IN OUT PKGUARDED_MUTEX GuardedMutex)
Definition: gmutex.c:53
#define DPRINT1
Definition: precomp.h:8
unsigned int ULONG
Definition: retypes.h:1
#define RtlZeroMemory(Destination, Length)
Definition: typedefs.h:262
#define ULONG_PTR
Definition: config.h:101
ULONG_PTR Entry
Definition: miarm.h:449
base of all file and directory entries
Definition: entries.h:82
#define ExFreePool(addr)
Definition: env_spec_w32.h:352
#define PAGED_CODE()
MMSESSION MmSession
Definition: section.c:107

Referenced by MiMapViewInSystemSpace().

◆ MiIsProtectionCompatible()

BOOLEAN NTAPI MiIsProtectionCompatible ( IN ULONG  SectionPageProtection,
IN ULONG  NewSectionPageProtection 
)

Definition at line 117 of file section.c.

119 {
120  ULONG ProtectionMask, CompatibleMask;
121 
122  /* Calculate the protection mask and make sure it's valid */
124  if (ProtectionMask == MM_INVALID_PROTECTION)
125  {
126  DPRINT1("Invalid protection mask\n");
127  return FALSE;
128  }
129 
130  /* Calculate the compatible mask */
131  CompatibleMask = MmCompatibleProtectionMask[ProtectionMask & 0x7] |
133 
134  /* See if the mapping protection is compatible with the create protection */
135  return ((CompatibleMask | NewSectionPageProtection) == CompatibleMask);
136 }
#define PAGE_NOCACHE
Definition: nt_native.h:1311
#define MM_INVALID_PROTECTION
Definition: miarm.h:67
#define PAGE_GUARD
Definition: nt_native.h:1310
_In_ ACCESS_MASK _In_opt_ POBJECT_ATTRIBUTES _In_opt_ PLARGE_INTEGER _In_ ULONG SectionPageProtection
Definition: mmfuncs.h:360
return FALSE
Definition: section.c:5060
ULONG NTAPI MiMakeProtectionMask(IN ULONG Protect)
Definition: section.c:158
ULONG MmCompatibleProtectionMask[8]
Definition: section.c:84
#define PAGE_WRITECOMBINE
Definition: mmtypes.h:78
#define DPRINT1
Definition: precomp.h:8
unsigned int ULONG
Definition: retypes.h:1

Referenced by MmMapViewOfArm3Section().

◆ MiLoadUserSymbols()

VOID NTAPI MiLoadUserSymbols ( IN PCONTROL_AREA  ControlArea,
IN PVOID  BaseAddress,
IN PEPROCESS  Process 
)

Definition at line 1186 of file section.c.

1189 {
1190  NTSTATUS Status;
1192  PLIST_ENTRY NextEntry;
1194  PIMAGE_NT_HEADERS NtHeaders;
1195  PLDR_DATA_TABLE_ENTRY LdrEntry;
1196 
1197  FileName = &ControlArea->FilePointer->FileName;
1198  if (FileName->Length == 0)
1199  {
1200  return;
1201  }
1202 
1203  /* Acquire module list lock */
1206 
1207  /* Browse list to try to find current module */
1208  for (NextEntry = MmLoadedUserImageList.Flink;
1209  NextEntry != &MmLoadedUserImageList;
1210  NextEntry = NextEntry->Flink)
1211  {
1212  /* Get the entry */
1213  LdrEntry = CONTAINING_RECORD(NextEntry,
1215  InLoadOrderLinks);
1216 
1217  /* If already in the list, increase load count */
1218  if (LdrEntry->DllBase == BaseAddress)
1219  {
1220  ++LdrEntry->LoadCount;
1221  break;
1222  }
1223  }
1224 
1225  /* Not in the list, we'll add it */
1226  if (NextEntry == &MmLoadedUserImageList)
1227  {
1228  /* Allocate our element, taking to the name string and its null char */
1229  LdrEntry = ExAllocatePoolWithTag(NonPagedPool, FileName->Length + sizeof(UNICODE_NULL) + sizeof(*LdrEntry), 'bDmM');
1230  if (LdrEntry)
1231  {
1232  memset(LdrEntry, 0, FileName->Length + sizeof(UNICODE_NULL) + sizeof(*LdrEntry));
1233 
1234  _SEH2_TRY
1235  {
1236  /* Get image checksum and size */
1237  NtHeaders = RtlImageNtHeader(BaseAddress);
1238  if (NtHeaders)
1239  {
1240  LdrEntry->SizeOfImage = NtHeaders->OptionalHeader.SizeOfImage;
1241  LdrEntry->CheckSum = NtHeaders->OptionalHeader.CheckSum;
1242  }
1243  }
1245  {
1246  ExFreePoolWithTag(LdrEntry, 'bDmM');
1249  _SEH2_YIELD(return);
1250  }
1251  _SEH2_END;
1252 
1253  /* Fill all the details */
1254  LdrEntry->DllBase = BaseAddress;
1255  LdrEntry->FullDllName.Buffer = (PVOID)((ULONG_PTR)LdrEntry + sizeof(*LdrEntry));
1256  LdrEntry->FullDllName.Length = FileName->Length;
1257  LdrEntry->FullDllName.MaximumLength = FileName->Length + sizeof(UNICODE_NULL);
1258  memcpy(LdrEntry->FullDllName.Buffer, FileName->Buffer, FileName->Length);
1259  LdrEntry->FullDllName.Buffer[LdrEntry->FullDllName.Length / sizeof(WCHAR)] = UNICODE_NULL;
1260  LdrEntry->LoadCount = 1;
1261 
1262  /* Insert! */
1264  }
1265  }
1266 
1267  /* Release locks */
1270 
1271  /* Load symbols */
1273  if (NT_SUCCESS(Status))
1274  {
1277  }
1278 }
USHORT MaximumLength
Definition: env_spec_w32.h:370
#define TRUE
Definition: types.h:120
FORCEINLINE VOID InsertHeadList(_Inout_ PLIST_ENTRY ListHead, _Inout_ __drv_aliasesMem PLIST_ENTRY Entry)
Definition: rtlfuncs.h:201
LONG NTSTATUS
Definition: precomp.h:26
ULONG SizeOfImage
Definition: ldrtypes.h:143
_SEH2_TRY
Definition: create.c:4226
uint32_t ULONG_PTR
Definition: typedefs.h:65
ERESOURCE PsLoadedModuleResource
Definition: sysldr.c:37
BOOLEAN NTAPI ExAcquireResourceExclusiveLite(IN PERESOURCE Resource, IN BOOLEAN Wait)
Definition: resource.c:770
PVOID DllBase
Definition: btrfs_drv.h:1870
#define UNICODE_NULL
NTSTATUS Status
Definition: section.c:4935
NTSYSAPI NTSTATUS NTAPI RtlUnicodeStringToAnsiString(PANSI_STRING DestinationString, PUNICODE_STRING SourceString, BOOLEAN AllocateDestinationString)
void * PVOID
Definition: retypes.h:9
PFLT_MESSAGE_WAITER_QUEUE CONTAINING_RECORD(Csq, DEVICE_EXTENSION, IrpQueue)) -> WaiterQ.mLock) _IRQL_raises_(DISPATCH_LEVEL) VOID NTAPI FltpAcquireMessageWaiterLock(_In_ PIO_CSQ Csq, _Out_ PKIRQL Irql)
Definition: Messaging.c:560
Status
Definition: gdiplustypes.h:24
struct _LIST_ENTRY * Flink
Definition: typedefs.h:121
_In_ HANDLE _Outptr_result_bytebuffer_ ViewSize PVOID * BaseAddress
Definition: mmfuncs.h:404
__wchar_t WCHAR
Definition: xmlstorage.h:180
#define NT_SUCCESS(StatCode)
Definition: apphelp.c:32
#define EXCEPTION_EXECUTE_HANDLER
Definition: excpt.h:85
ULONG CheckSum
Definition: btrfs_drv.h:1876
NTSYSAPI VOID NTAPI RtlFreeAnsiString(PANSI_STRING AnsiString)
VOID FASTCALL ExReleaseResourceLite(IN PERESOURCE Resource)
Definition: resource.c:1817
LIST_ENTRY MmLoadedUserImageList
Definition: sysldr.c:35
#define ExAllocatePoolWithTag(hernya, size, tag)
Definition: env_spec_w32.h:350
#define KeEnterCriticalRegion()
Definition: ke_x.h:88
Definition: btrfs_drv.h:1866
#define memcpy(s1, s2, n)
Definition: mkisofs.h:878
Definition: typedefs.h:119
IMAGE_OPTIONAL_HEADER32 OptionalHeader
Definition: ntddk_ex.h:184
LIST_ENTRY InLoadOrderLinks
Definition: ldrtypes.h:138
struct _FileName FileName
Definition: fatprocs.h:893
_SEH2_END
Definition: create.c:4400
#define KeLeaveCriticalRegion()
Definition: ke_x.h:119
UNICODE_STRING FullDllName
Definition: btrfs_drv.h:1872
VOID NTAPI DbgLoadImageSymbols(_In_ PSTRING Name, _In_ PVOID Base, _In_ ULONG_PTR ProcessId)
#define RtlImageNtHeader
Definition: compat.h:665
_Must_inspect_result_ _In_ PLARGE_INTEGER _In_ PLARGE_INTEGER _In_ ULONG _In_ PFILE_OBJECT _In_ PVOID Process
Definition: fsrtlfuncs.h:219
#define _SEH2_EXCEPT(...)
Definition: pseh2_64.h:40
#define _SEH2_YIELD(__stmt)
Definition: pseh2_64.h:168
#define memset(x, y, z)
Definition: compat.h:39
#define ExFreePoolWithTag(_P, _T)
Definition: module.h:1099
static const CHAR FileNameA[]
USHORT LoadCount
Definition: ntddk_ex.h:208

◆ MiLocateSubsection()

PSUBSECTION NTAPI MiLocateSubsection ( IN PMMVAD  Vad,
IN ULONG_PTR  Vpn 
)

Definition at line 574 of file section.c.

576 {
577  PSUBSECTION Subsection;
578  PCONTROL_AREA ControlArea;
579  ULONG_PTR PteOffset;
580 
581  /* Get the control area */
582  ControlArea = Vad->ControlArea;
583  ASSERT(ControlArea->u.Flags.Rom == 0);
584  ASSERT(ControlArea->u.Flags.Image == 0);
585  ASSERT(ControlArea->u.Flags.GlobalOnlyPerSession == 0);
586 
587  /* Get the subsection */
588  Subsection = (PSUBSECTION)(ControlArea + 1);
589 
590  /* We only support single-subsection segments */
591  ASSERT(Subsection->SubsectionBase != NULL);
592  ASSERT(Vad->FirstPrototypePte >= Subsection->SubsectionBase);
593  ASSERT(Vad->FirstPrototypePte < &Subsection->SubsectionBase[Subsection->PtesInSubsection]);
594 
595  /* Compute the PTE offset */
596  PteOffset = Vpn - Vad->StartingVpn;
597  PteOffset += Vad->FirstPrototypePte - Subsection->SubsectionBase;
598 
599  /* Again, we only support single-subsection segments */
600  ASSERT(PteOffset < 0xF0000000);
601  ASSERT(PteOffset < Subsection->PtesInSubsection);
602 
603  /* Return the subsection */
604  return Subsection;
605 }
union _CONTROL_AREA::@2558 u
uint32_t ULONG_PTR
Definition: typedefs.h:65
ASSERT(Segment->Locked)
struct _SUBSECTION * PSUBSECTION
ULONG GlobalOnlyPerSession
Definition: mmtypes.h:488
#define NULL
Definition: types.h:112
MMSECTION_FLAGS Flags
Definition: mmtypes.h:528
PMMPTE SubsectionBase
Definition: mmtypes.h:578
ULONG PtesInSubsection
Definition: mmtypes.h:580

Referenced by MiDeleteVirtualAddresses().

◆ MiMakeProtectionMask()

ULONG NTAPI MiMakeProtectionMask ( IN ULONG  Protect)

Definition at line 158 of file section.c.

159 {
160  ULONG Mask1, Mask2, ProtectMask;
161 
162  /* PAGE_EXECUTE_WRITECOMBINE is theoretically the maximum */
163  if (Protect >= (PAGE_WRITECOMBINE * 2)) return MM_INVALID_PROTECTION;
164 
165  /*
166  * Windows API protection mask can be understood as two bitfields, differing
167  * by whether or not execute rights are being requested
168  */
169  Mask1 = Protect & 0xF;
170  Mask2 = (Protect >> 4) & 0xF;
171 
172  /* Check which field is there */
173  if (!Mask1)
174  {
175  /* Mask2 must be there, use it to determine the PTE protection */
176  if (!Mask2) return MM_INVALID_PROTECTION;
177  ProtectMask = MmUserProtectionToMask2[Mask2];
178  }
179  else
180  {
181  /* Mask2 should not be there, use Mask1 to determine the PTE mask */
182  if (Mask2) return MM_INVALID_PROTECTION;
183  ProtectMask = MmUserProtectionToMask1[Mask1];
184  }
185 
186  /* Make sure the final mask is a valid one */
187  if (ProtectMask == MM_INVALID_PROTECTION) return MM_INVALID_PROTECTION;
188 
189  /* Check for PAGE_GUARD option */
190  if (Protect & PAGE_GUARD)
191  {
192  /* It's not valid on no-access, nocache, or writecombine pages */
193  if ((ProtectMask == MM_NOACCESS) ||
195  {
196  /* Fail such requests */
197  return MM_INVALID_PROTECTION;
198  }
199 
200  /* This actually turns on guard page in this scenario! */
201  ProtectMask |= MM_GUARDPAGE;
202  }
203 
204  /* Check for nocache option */
205  if (Protect & PAGE_NOCACHE)
206  {
207  /* The earlier check should've eliminated this possibility */
208  ASSERT((Protect & PAGE_GUARD) == 0);
209 
210  /* Check for no-access page or write combine page */
211  if ((ProtectMask == MM_NOACCESS) || (Protect & PAGE_WRITECOMBINE))
212  {
213  /* Such a request is invalid */
214  return MM_INVALID_PROTECTION;
215  }
216 
217  /* Add the PTE flag */
218  ProtectMask |= MM_NOCACHE;
219  }
220 
221  /* Check for write combine option */
223  {
224  /* The two earlier scenarios should've caught this */
225  ASSERT((Protect & (PAGE_GUARD | PAGE_NOACCESS)) == 0);
226 
227  /* Don't allow on no-access pages */
228  if (ProtectMask == MM_NOACCESS) return MM_INVALID_PROTECTION;
229 
230  /* This actually turns on write-combine in this scenario! */
231  ProtectMask |= MM_NOACCESS;
232  }
233 
234  /* Return the final MM PTE protection mask */
235  return ProtectMask;
236 }
#define PAGE_NOCACHE
Definition: nt_native.h:1311
#define MM_INVALID_PROTECTION
Definition: miarm.h:67
_In_ HANDLE _Outptr_result_bytebuffer_ ViewSize PVOID _In_ ULONG_PTR _In_ SIZE_T _Inout_opt_ PLARGE_INTEGER _Inout_ PSIZE_T _In_ SECTION_INHERIT _In_ ULONG _In_ ULONG Protect
Definition: zwfuncs.h:214
CHAR MmUserProtectionToMask1[16]
Definition: section.c:44
#define PAGE_GUARD
Definition: nt_native.h:1310
#define MM_NOACCESS
Definition: miarm.h:65
#define MM_NOCACHE
Definition: miarm.h:56
ASSERT(Segment->Locked)
#define PAGE_NOACCESS
Definition: nt_native.h:1302
CHAR MmUserProtectionToMask2[16]
Definition: section.c:64
#define MM_GUARDPAGE
Definition: miarm.h:57
#define PAGE_WRITECOMBINE
Definition: mmtypes.h:78
unsigned int ULONG
Definition: retypes.h:1

Referenced by MiArm3GetCorrectFileAccessMask(), MiIsProtectionCompatible(), MiProtectVirtualMemory(), MiSetProtectionOnSection(), MmCreateArm3Section(), MmCreateSection(), MmCreateVirtualMappingUnsafe(), MmInsertMemoryArea(), MmMapViewOfArm3Section(), MmSetPageProtect(), NtAllocateVirtualMemory(), and NtMapViewOfSection().

◆ MiMapViewInSystemSpace()

NTSTATUS MiMapViewInSystemSpace ( _In_ PVOID  Section,
_In_ PMMSESSION  Session,
_Outptr_result_bytebuffer_ *ViewSize PVOID MappedBase,
_Inout_ PSIZE_T  ViewSize,
_Inout_ PLARGE_INTEGER  SectionOffset 
)

Definition at line 1058 of file section.c.

1064 {
1065  PVOID Base;
1066  PCONTROL_AREA ControlArea;
1067  ULONG Buckets;
1068  LONGLONG SectionSize;
1069  NTSTATUS Status;
1070  PAGED_CODE();
1071 
1072  /* Get the control area, check for any flags ARM3 doesn't yet support */
1073  ControlArea = ((PSECTION)Section)->Segment->ControlArea;
1074  ASSERT(ControlArea->u.Flags.Image == 0);
1075  ASSERT(ControlArea->FilePointer == NULL);
1076  ASSERT(ControlArea->u.Flags.GlobalOnlyPerSession == 0);
1077  ASSERT(ControlArea->u.Flags.Rom == 0);
1078  ASSERT(ControlArea->u.Flags.WasPurged == 0);
1079 
1080  /* Increase the reference and map count on the control area, no purges yet */
1081  Status = MiCheckPurgeAndUpMapCount(ControlArea, FALSE);
1083 
1084  /* Get the section size at creation time */
1085  SectionSize = ((PSECTION)Section)->SizeOfSection.QuadPart;
1086 
1087  /* If the caller didn't specify a view size, assume until the end of the section */
1088  if (!(*ViewSize))
1089  {
1090  /* Check for overflow first */
1091  if ((SectionSize - SectionOffset->QuadPart) > SIZE_T_MAX)
1092  {
1093  DPRINT1("Section end is too far away from the specified offset.\n");
1094  MiDereferenceControlArea(ControlArea);
1095  return STATUS_INVALID_VIEW_SIZE;
1096  }
1097  *ViewSize = SectionSize - SectionOffset->QuadPart;
1098  }
1099 
1100  /* Check overflow */
1101  if ((SectionOffset->QuadPart + *ViewSize) < SectionOffset->QuadPart)
1102  {
1103  DPRINT1("Integer overflow between size & offset!\n");
1104  MiDereferenceControlArea(ControlArea);
1105  return STATUS_INVALID_VIEW_SIZE;
1106  }
1107 
1108  /* Check if the caller wanted a larger section than the view */
1109  if (SectionOffset->QuadPart + *ViewSize > SectionSize)
1110  {
1111  /* Fail */
1112  DPRINT1("View is too large\n");
1113  MiDereferenceControlArea(ControlArea);
1114  return STATUS_INVALID_VIEW_SIZE;
1115  }
1116 
1117  /* Get the number of 64K buckets required for this mapping */
1118  Buckets = (ULONG)(*ViewSize / MI_SYSTEM_VIEW_BUCKET_SIZE);
1119  if (*ViewSize & (MI_SYSTEM_VIEW_BUCKET_SIZE - 1)) Buckets++;
1120 
1121  /* Check if the view is more than 4GB large */
1122  if (Buckets >= MI_SYSTEM_VIEW_BUCKET_SIZE)
1123  {
1124  /* Fail */
1125  DPRINT1("View is too large\n");
1126  MiDereferenceControlArea(ControlArea);
1127  return STATUS_INVALID_VIEW_SIZE;
1128  }
1129 
1130  /* Insert this view into system space and get a base address for it */
1131  Base = MiInsertInSystemSpace(Session, Buckets, ControlArea);
1132  if (!Base)
1133  {
1134  /* Fail */
1135  DPRINT1("Out of system space\n");
1136  MiDereferenceControlArea(ControlArea);
1137  return STATUS_NO_MEMORY;
1138  }
1139 
1140  /* What's the underlying session? */
1141  if (Session == &MmSession)
1142  {
1143  /* Create the PDEs needed for this mapping, and double-map them if needed */
1146  }
1147  else
1148  {
1149  /* Create the PDEs needed for this mapping */
1151  (PVOID)((ULONG_PTR)Base +
1152  Buckets * MI_SYSTEM_VIEW_BUCKET_SIZE));
1154  }
1155 
1156  /* Create the actual prototype PTEs for this mapping */
1159  ControlArea,
1160  SectionOffset->QuadPart);
1162 
1163  /* Return the base adress of the mapping and success */
1164  *MappedBase = Base;
1165  return STATUS_SUCCESS;
1166 }
PFILE_OBJECT FilePointer
Definition: mmtypes.h:530
union _CONTROL_AREA::@2558 u
#define SIZE_T_MAX
Definition: dhcpd.h:91
LONG NTSTATUS
Definition: precomp.h:26
_In_opt_ ULONG Base
Definition: rtlfuncs.h:2413
NTSTATUS NTAPI MiSessionCommitPageTables(IN PVOID StartVa, IN PVOID EndVa)
Definition: section.c:942
struct _CONTROL_AREA * ControlArea
Definition: mmtypes.h:406
uint32_t ULONG_PTR
Definition: typedefs.h:65
NTSTATUS NTAPI MiCheckPurgeAndUpMapCount(IN PCONTROL_AREA ControlArea, IN BOOLEAN FailIfSystemViews)
Definition: section.c:548
VOID NTAPI MiDereferenceControlArea(IN PCONTROL_AREA ControlArea)
Definition: section.c:767
ASSERT(Segment->Locked)
#define MiAddressToPte(x)
Definition: mmx86.c:19
static NTSTATUS MiAddMappedPtes(IN PMMPTE FirstPte, IN PFN_NUMBER PteCount, IN PCONTROL_AREA ControlArea, IN LONGLONG SectionOffset)
Definition: section.c:417
NTSTATUS Status
Definition: section.c:4935
return FALSE
Definition: section.c:5060
struct _SECTION * PSECTION
PVOID NTAPI MiInsertInSystemSpace(IN PMMSESSION Session, IN ULONG Buckets, IN PCONTROL_AREA ControlArea)
Definition: section.c:306
_In_ HANDLE _Outptr_result_bytebuffer_ ViewSize PVOID _In_ ULONG_PTR _In_ SIZE_T _Inout_opt_ PLARGE_INTEGER SectionOffset
Definition: mmfuncs.h:404
Status
Definition: gdiplustypes.h:24
int64_t LONGLONG
Definition: typedefs.h:68
#define NT_SUCCESS(StatCode)
Definition: apphelp.c:32
VOID NTAPI MiFillSystemPageDirectory(IN PVOID Base, IN SIZE_T NumberOfBytes)
Definition: section.c:480
#define BYTES_TO_PAGES(Size)
ULONG GlobalOnlyPerSession
Definition: mmtypes.h:488
#define STATUS_INVALID_VIEW_SIZE
Definition: ntstatus.h:268
#define MI_SYSTEM_VIEW_BUCKET_SIZE
Definition: miarm.h:266
#define STATUS_NO_MEMORY
Definition: ntstatus.h:260
PSEGMENT Segment
Definition: mmtypes.h:518
#define NULL
Definition: types.h:112
#define DPRINT1
Definition: precomp.h:8
_Must_inspect_result_ _Outptr_result_bytebuffer_ ViewSize PVOID * MappedBase
Definition: mmfuncs.h:492
_In_ HANDLE _Outptr_result_bytebuffer_ ViewSize PVOID _In_ ULONG_PTR _In_ SIZE_T _Inout_opt_ PLARGE_INTEGER _Inout_ PSIZE_T ViewSize
Definition: mmfuncs.h:404
ULONG WasPurged
Definition: mmtypes.h:475
MMSECTION_FLAGS Flags
Definition: mmtypes.h:528
unsigned int ULONG
Definition: retypes.h:1
#define STATUS_SUCCESS
Definition: shellext.h:65
#define PAGED_CODE()
MMSESSION MmSession
Definition: section.c:107

Referenced by MmMapViewInSessionSpace(), and MmMapViewInSystemSpaceEx().

◆ MiMapViewOfDataSection()

NTSTATUS NTAPI MiMapViewOfDataSection ( IN PCONTROL_AREA  ControlArea,
IN PEPROCESS  Process,
IN PVOID BaseAddress,
IN PLARGE_INTEGER  SectionOffset,
IN PSIZE_T  ViewSize,
IN PSECTION  Section,
IN SECTION_INHERIT  InheritDisposition,
IN ULONG  ProtectionMask,
IN SIZE_T  CommitSize,
IN ULONG_PTR  ZeroBits,
IN ULONG  AllocationType 
)

Definition at line 1282 of file section.c.

1293 {
1294  PMMVAD_LONG Vad;
1295  ULONG_PTR StartAddress;
1296  ULONG_PTR ViewSizeInPages;
1297  PSUBSECTION Subsection;
1298  PSEGMENT Segment;
1299  PFN_NUMBER PteOffset;
1300  NTSTATUS Status;
1301  ULONG QuotaCharge = 0, QuotaExcess = 0;
1302  PMMPTE PointerPte, LastPte;
1303  MMPTE TempPte;
1304  ULONG Granularity = MM_VIRTMEM_GRANULARITY;
1305 
1306  DPRINT("Mapping ARM3 data section\n");
1307 
1308  /* Get the segment for this section */
1309  Segment = ControlArea->Segment;
1310 
1311 #ifdef _M_IX86
1312  /* ALlow being less restrictive on x86. */
1314  Granularity = PAGE_SIZE;
1315 #endif
1316 
1317  /* One can only reserve a file-based mapping, not shared memory! */
1318  if ((AllocationType & MEM_RESERVE) && !(ControlArea->FilePointer))
1319  {
1321  }
1322 
1323  /* First, increase the map count. No purging is supported yet */
1324  Status = MiCheckPurgeAndUpMapCount(ControlArea, FALSE);
1325  if (!NT_SUCCESS(Status)) return Status;
1326 
1327  /* Check if the caller specified the view size */
1328  if (!(*ViewSize))
1329  {
1330  LONGLONG ViewSizeLL;
1331 
1332  /* The caller did not, so pick a 64K aligned view size based on the offset */
1333  SectionOffset->LowPart &= ~(_64K - 1);
1334 
1335  /* Calculate size and make sure this fits */
1336  if (!NT_SUCCESS(RtlLongLongSub(Section->SizeOfSection.QuadPart, SectionOffset->QuadPart, &ViewSizeLL))
1337  || !NT_SUCCESS(RtlLongLongToSIZET(ViewSizeLL, ViewSize))
1338  || (*ViewSize > MAXLONG_PTR))
1339  {
1340  MiDereferenceControlArea(ControlArea);
1341  return STATUS_INVALID_VIEW_SIZE;
1342  }
1343  }
1344  else
1345  {
1346  /* A size was specified, align it to a 64K boundary
1347  * and check for overflow or huge value. */
1348  if (!NT_SUCCESS(RtlSIZETAdd(*ViewSize, SectionOffset->LowPart & (_64K - 1), ViewSize))
1349  || (*ViewSize > MAXLONG_PTR))
1350  {
1351  MiDereferenceControlArea(ControlArea);
1352  return STATUS_INVALID_VIEW_SIZE;
1353  }
1354 
1355  /* Align the offset as well to make this an aligned map */
1356  SectionOffset->LowPart &= ~((ULONG)_64K - 1);
1357  }
1358 
1359  /* We must be dealing with a 64KB aligned offset. This is a Windows ASSERT */
1360  ASSERT((SectionOffset->LowPart & ((ULONG)_64K - 1)) == 0);
1361 
1362  /* Windows ASSERTs for this flag */
1363  ASSERT(ControlArea->u.Flags.GlobalOnlyPerSession == 0);
1364 
1365  /* Get the subsection. We don't support LARGE_CONTROL_AREA in ARM3 */
1366  ASSERT(ControlArea->u.Flags.Rom == 0);
1367  Subsection = (PSUBSECTION)(ControlArea + 1);
1368 
1369  /* Sections with extended segments are not supported in ARM3 */
1370  ASSERT(Segment->SegmentFlags.TotalNumberOfPtes4132 == 0);
1371 
1372  /* Within this section, figure out which PTEs will describe the view */
1373  PteOffset = (PFN_NUMBER)(SectionOffset->QuadPart >> PAGE_SHIFT);
1374 
1375  /* The offset must be in this segment's PTE chunk and it must be valid. Windows ASSERTs */
1376  ASSERT(PteOffset < Segment->TotalNumberOfPtes);
1377  ASSERT(((SectionOffset->QuadPart + *ViewSize + PAGE_SIZE - 1) >> PAGE_SHIFT) >= PteOffset);
1378 
1379  /* In ARM3, only one subsection is used for now. It must contain these PTEs */
1380  ASSERT(PteOffset < Subsection->PtesInSubsection);
1381 
1382  /* In ARM3, only page-file backed sections (shared memory) are supported now */
1383  ASSERT(ControlArea->FilePointer == NULL);
1384 
1385  /* Windows ASSERTs for this too -- there must be a subsection base address */
1386  ASSERT(Subsection->SubsectionBase != NULL);
1387 
1388  /* Compute how much commit space the segment will take */
1389  if ((CommitSize) && (Segment->NumberOfCommittedPages < Segment->TotalNumberOfPtes))
1390  {
1391  /* Charge for the maximum pages */
1392  QuotaCharge = BYTES_TO_PAGES(CommitSize);
1393  }
1394 
1395  /* ARM3 does not currently support large pages */
1396  ASSERT(Segment->SegmentFlags.LargePages == 0);
1397 
1398  /* Calculate how many pages the region spans */
1399  ViewSizeInPages = BYTES_TO_PAGES(*ViewSize);
1400 
1401  /* A VAD can now be allocated. Do so and zero it out */
1402  /* FIXME: we are allocating a LONG VAD for ReactOS compatibility only */
1403  ASSERT((AllocationType & MEM_RESERVE) == 0); /* ARM3 does not support this */
1404  Vad = ExAllocatePoolWithTag(NonPagedPool, sizeof(MMVAD_LONG), 'ldaV');
1405  if (!Vad)
1406  {
1407  MiDereferenceControlArea(ControlArea);
1409  }
1410 
1411  RtlZeroMemory(Vad, sizeof(MMVAD_LONG));
1412  Vad->u4.Banked = (PVOID)(ULONG_PTR)0xDEADBABEDEADBABEULL;
1413 
1414  /* Write all the data required in the VAD for handling a fault */
1415  Vad->ControlArea = ControlArea;
1416  Vad->u.VadFlags.CommitCharge = 0;
1417  Vad->u.VadFlags.Protection = ProtectionMask;
1418  Vad->u2.VadFlags2.FileOffset = (ULONG)(SectionOffset->QuadPart >> 16);
1420  if ((AllocationType & SEC_NO_CHANGE) || (Section->u.Flags.NoChange))
1421  {
1422  /* This isn't really implemented yet, but handle setting the flag */
1423  Vad->u.VadFlags.NoChange = 1;
1424  Vad->u2.VadFlags2.SecNoChange = 1;
1425  }
1426 
1427  /* Finally, write down the first and last prototype PTE */
1428  Vad->FirstPrototypePte = &Subsection->SubsectionBase[PteOffset];
1429  PteOffset += ViewSizeInPages - 1;
1430  ASSERT(PteOffset < Subsection->PtesInSubsection);
1431  Vad->LastContiguousPte = &Subsection->SubsectionBase[PteOffset];
1432 
1433  /* Make sure the prototype PTE ranges make sense, this is a Windows ASSERT */
1435 
1436  /* FIXME: Should setup VAD bitmap */
1438 
1439  /* Check if anything was committed */
1440  if (QuotaCharge)
1441  {
1442  /* Set the start and end PTE addresses, and pick the template PTE */
1443  PointerPte = Vad->FirstPrototypePte;
1444  LastPte = PointerPte + BYTES_TO_PAGES(CommitSize);
1445  TempPte = Segment->SegmentPteTemplate;
1446 
1447  /* Acquire the commit lock and loop all prototype PTEs to be committed */
1449  while (PointerPte < LastPte)
1450  {
1451  /* Make sure the PTE is already invalid */
1452  if (PointerPte->u.Long == 0)
1453  {
1454  /* And write the invalid PTE */
1455  MI_WRITE_INVALID_PTE(PointerPte, TempPte);
1456  }
1457  else
1458  {
1459  /* The PTE is valid, so skip it */
1460  QuotaExcess++;
1461  }
1462 
1463  /* Move to the next PTE */
1464  PointerPte++;
1465  }
1466 
1467  /* Now check how many pages exactly we committed, and update accounting */
1468  ASSERT(QuotaCharge >= QuotaExcess);
1469  QuotaCharge -= QuotaExcess;
1470  Segment->NumberOfCommittedPages += QuotaCharge;
1471  ASSERT(Segment->NumberOfCommittedPages <= Segment->TotalNumberOfPtes);
1472 
1473  /* Now that we're done, release the lock */
1475  }
1476 
1477  /* Is it SEC_BASED, or did the caller manually specify an address? */
1478  if (*BaseAddress != NULL)
1479  {
1480  /* Just align what the caller gave us */
1481  StartAddress = ALIGN_DOWN_BY((ULONG_PTR)*BaseAddress, Granularity);
1482  }
1483  else if (Section->Address.StartingVpn != 0)
1484  {
1485  /* It is a SEC_BASED mapping, use the address that was generated */
1486  StartAddress = Section->Address.StartingVpn + SectionOffset->LowPart;
1487  }
1488  else
1489  {
1490  StartAddress = 0;
1491  }
1492 
1494  if (!NT_SUCCESS(Status))
1495  {
1496  ExFreePoolWithTag(Vad, 'ldaV');
1497  MiDereferenceControlArea(ControlArea);
1498 
1500  Segment->NumberOfCommittedPages -= QuotaCharge;
1502  return Status;
1503  }
1504 
1505  /* Insert the VAD */
1506  Status = MiInsertVadEx((PMMVAD)Vad,
1507  &StartAddress,
1508  ViewSizeInPages * PAGE_SIZE,
1510  Granularity,
1511  AllocationType);
1512  if (!NT_SUCCESS(Status))
1513  {
1514  ExFreePoolWithTag(Vad, 'ldaV');
1515  MiDereferenceControlArea(ControlArea);
1516 
1518  Segment->NumberOfCommittedPages -= QuotaCharge;
1520 
1522  return Status;
1523  }
1524 
1525  /* Windows stores this for accounting purposes, do so as well */
1526  if (!Segment->u2.FirstMappedVa) Segment->u2.FirstMappedVa = (PVOID)StartAddress;
1527 
1528  /* Finally, let the caller know where, and for what size, the view was mapped */
1529  *ViewSize = ViewSizeInPages * PAGE_SIZE;
1530  *BaseAddress = (PVOID)StartAddress;
1531  DPRINT("Start and region: 0x%p, 0x%p\n", *BaseAddress, *ViewSize);
1532  return STATUS_SUCCESS;
1533 }
_In_ HANDLE _Outptr_result_bytebuffer_ ViewSize PVOID _In_ ULONG_PTR _In_ SIZE_T _Inout_opt_ PLARGE_INTEGER _Inout_ PSIZE_T _In_ SECTION_INHERIT InheritDisposition
Definition: mmfuncs.h:404
_In_ HANDLE _Outptr_result_bytebuffer_ ViewSize PVOID _In_ ULONG_PTR ZeroBits
Definition: mmfuncs.h:404
#define PAGE_SHIFT
Definition: env_spec_w32.h:45
#define MM_VIRTMEM_GRANULARITY
Definition: mm.h:102
#define STATUS_INSUFFICIENT_RESOURCES
Definition: udferr_usr.h:158
NTSTATUS NTAPI PsChargeProcessNonPagedPoolQuota(_In_ PEPROCESS Process, _In_ SIZE_T Amount)
Charges the non paged pool quota of a given process.
Definition: quota.c:811
VOID FASTCALL KeAcquireGuardedMutex(IN PKGUARDED_MUTEX GuardedMutex)
Definition: gmutex.c:42
PMMPTE LastContiguousPte
Definition: mmtypes.h:764
MMVAD_FLAGS VadFlags
Definition: mmtypes.h:760
ULONG_PTR CommitCharge
Definition: mmtypes.h:688
LONG NTSTATUS
Definition: precomp.h:26
#define STATUS_INVALID_PARAMETER_9
Definition: ntstatus.h:483
#define MAXULONG_PTR
Definition: basetsd.h:103
ULONG SecNoChange
Definition: mmtypes.h:704
PCONTROL_AREA ControlArea
Definition: mmtypes.h:762
ULONG_PTR Protection
Definition: mmtypes.h:693
ULONG_PTR NoChange
Definition: mmtypes.h:690
uint32_t ULONG_PTR
Definition: typedefs.h:65
NTSTATUS NTAPI MiCheckPurgeAndUpMapCount(IN PCONTROL_AREA ControlArea, IN BOOLEAN FailIfSystemViews)
Definition: section.c:548
VOID NTAPI MiDereferenceControlArea(IN PCONTROL_AREA ControlArea)
Definition: section.c:767
ASSERT(Segment->Locked)
ULONG PFN_NUMBER
Definition: ke.h:9
union _MMVAD_LONG::@2569 u2
#define MEM_RESERVE
Definition: nt_native.h:1314
NTSTATUS Status
Definition: section.c:4935
#define PsGetCurrentProcess
Definition: psfuncs.h:17
PVOID Banked
Definition: mmtypes.h:777
return FALSE
Definition: section.c:5060
void * PVOID
Definition: retypes.h:9
#define ULL(a, b)
Definition: format_msg.c:27
_Inout_ PVOID Segment
Definition: exfuncs.h:1101
union _MMVAD_LONG::@2571 u4
_In_ HANDLE _Outptr_result_bytebuffer_ ViewSize PVOID _In_ ULONG_PTR _In_ SIZE_T _Inout_opt_ PLARGE_INTEGER SectionOffset
Definition: mmfuncs.h:404
ULONG FileOffset
Definition: mmtypes.h:703
#define MEM_DOS_LIM
Definition: mmtypes.h:89
Status
Definition: gdiplustypes.h:24
int64_t LONGLONG
Definition: typedefs.h:68
_In_ HANDLE _Outptr_result_bytebuffer_ ViewSize PVOID * BaseAddress
Definition: mmfuncs.h:404
NTSTATUS NTAPI MiInsertVadEx(_Inout_ PMMVAD Vad, _In_ ULONG_PTR *BaseAddress, _In_ SIZE_T ViewSize, _In_ ULONG_PTR HighestAddress, _In_ ULONG_PTR Alignment, _In_ ULONG AllocationType)
Definition: vadnode.c:204
#define NT_SUCCESS(StatCode)
Definition: apphelp.c:32
_In_ HANDLE _Outptr_result_bytebuffer_ ViewSize PVOID _In_ ULONG_PTR _In_ SIZE_T CommitSize
Definition: mmfuncs.h:404
MMVAD_FLAGS2 VadFlags2
Definition: mmtypes.h:768
HARDWARE_PTE_ARMV6 TempPte
Definition: winldr.c:76
#define ExAllocatePoolWithTag(hernya, size, tag)
Definition: env_spec_w32.h:350
struct _SUBSECTION * PSUBSECTION
#define BYTES_TO_PAGES(Size)
#define PAGE_SIZE
Definition: env_spec_w32.h:49
_In_ HANDLE _Outptr_result_bytebuffer_ ViewSize PVOID _In_ ULONG_PTR _In_ SIZE_T _Inout_opt_ PLARGE_INTEGER _Inout_ PSIZE_T _In_ SECTION_INHERIT _In_ ULONG AllocationType
Definition: mmfuncs.h:404
#define _64K
Definition: miarm.h:23
KGUARDED_MUTEX MmSectionCommitMutex
Definition: section.c:108
ULONG Inherit
Definition: mmtypes.h:710
ULONG_PTR Long
Definition: mmtypes.h:215
#define ALIGN_DOWN_BY(size, align)
FORCEINLINE VOID MI_WRITE_INVALID_PTE(IN PMMPTE PointerPte, IN MMPTE InvalidPte)
Definition: miarm.h:997
#define STATUS_INVALID_VIEW_SIZE
Definition: ntstatus.h:268
DPRINT("Checking segment for file %wZ at offset 0x%I64X.\n", &Segment->FileObject->FileName, Offset->QuadPart)
#define NULL
Definition: types.h:112
VOID FASTCALL KeReleaseGuardedMutex(IN OUT PKGUARDED_MUTEX GuardedMutex)
Definition: gmutex.c:53
_Must_inspect_result_ _In_ PLARGE_INTEGER _In_ PLARGE_INTEGER _In_ ULONG _In_ PFILE_OBJECT _In_ PVOID Process
Definition: fsrtlfuncs.h:219
_In_ HANDLE _Outptr_result_bytebuffer_ ViewSize PVOID _In_ ULONG_PTR _In_ SIZE_T _Inout_opt_ PLARGE_INTEGER _Inout_ PSIZE_T ViewSize
Definition: mmfuncs.h:404
unsigned int ULONG
Definition: retypes.h:1
PMMPTE FirstPrototypePte
Definition: mmtypes.h:763
#define RtlZeroMemory(Destination, Length)
Definition: typedefs.h:262
union _MMPTE::@2284 u
#define STATUS_SUCCESS
Definition: shellext.h:65
union _MMVAD_LONG::@2568 u
VOID NTAPI PsReturnProcessNonPagedPoolQuota(_In_ PEPROCESS Process, _In_ SIZE_T Amount)
Returns the non paged quota pool that the process was taking up.
Definition: quota.c:938
#define ExFreePoolWithTag(_P, _T)
Definition: module.h:1099
#define SEC_NO_CHANGE
Definition: mmtypes.h:94
PMMPTE SubsectionBase
Definition: mmtypes.h:578
#define MAXLONG_PTR
Definition: basetsd.h:104

Referenced by MmMapViewOfArm3Section().

◆ MiQueryMemorySectionName()

NTSTATUS NTAPI MiQueryMemorySectionName ( IN HANDLE  ProcessHandle,
IN PVOID  BaseAddress,
OUT PVOID  MemoryInformation,
IN SIZE_T  MemoryInformationLength,
OUT PSIZE_T  ReturnLength 
)

Definition at line 1966 of file section.c.

1971 {
1973  NTSTATUS Status;
1975  PMEMORY_SECTION_NAME SectionName = NULL;
1977 
1980  NULL,
1981  PreviousMode,
1982  (PVOID*)(&Process),
1983  NULL);
1984 
1985  if (!NT_SUCCESS(Status))
1986  {
1987  DPRINT("MiQueryMemorySectionName: ObReferenceObjectByHandle returned %x\n",Status);
1988  return Status;
1989  }
1990 
1992 
1993  if (NT_SUCCESS(Status))
1994  {
1995  SectionName = MemoryInformation;
1996  if (PreviousMode != KernelMode)
1997  {
1998  _SEH2_TRY
1999  {
2000  RtlInitEmptyUnicodeString(&SectionName->SectionFileName,
2001  (PWSTR)(SectionName + 1),
2002  MemoryInformationLength - sizeof(MEMORY_SECTION_NAME));
2004 
2006 
2007  }
2009  {
2011  }
2012  _SEH2_END;
2013  }
2014  else
2015  {
2016  RtlInitEmptyUnicodeString(&SectionName->SectionFileName,
2017  (PWSTR)(SectionName + 1),
2018  MemoryInformationLength - sizeof(MEMORY_SECTION_NAME));
2020 
2022 
2023  }
2024 
2026  }
2028  return Status;
2029 }
IN CINT OUT PVOID IN ULONG OUT PULONG ReturnLength
Definition: dumpinfo.c:39
NTSTATUS NTAPI MmGetFileNameForAddress(IN PVOID Address, OUT PUNICODE_STRING ModuleName)
Definition: section.c:1903
#define PROCESS_QUERY_INFORMATION
Definition: pstypes.h:166
uint16_t * PWSTR
Definition: typedefs.h:56
LONG NTSTATUS
Definition: precomp.h:26
KPROCESSOR_MODE NTAPI ExGetPreviousMode(VOID)
Definition: sysinfo.c:3062
NTSYSAPI VOID NTAPI RtlCopyUnicodeString(PUNICODE_STRING DestinationString, PUNICODE_STRING SourceString)
_SEH2_TRY
Definition: create.c:4226
NTSTATUS NTAPI ObReferenceObjectByHandle(IN HANDLE Handle, IN ACCESS_MASK DesiredAccess, IN POBJECT_TYPE ObjectType, IN KPROCESSOR_MODE AccessMode, OUT PVOID *Object, OUT POBJECT_HANDLE_INFORMATION HandleInformation OPTIONAL)
Definition: obref.c:494
NTSTATUS Status
Definition: section.c:4935
TCHAR ModuleFileName[MAX_PATH+1]
Definition: rundll32.c:55
Status
Definition: gdiplustypes.h:24
_In_ KPROCESSOR_MODE PreviousMode
Definition: sefuncs.h:103
_In_ HANDLE _Outptr_result_bytebuffer_ ViewSize PVOID * BaseAddress
Definition: mmfuncs.h:404
#define NT_SUCCESS(StatCode)
Definition: apphelp.c:32
#define EXCEPTION_EXECUTE_HANDLER
Definition: excpt.h:85
#define ObDereferenceObject
Definition: obfuncs.h:203
NTSYSAPI VOID NTAPI RtlFreeUnicodeString(PUNICODE_STRING UnicodeString)
CCHAR KPROCESSOR_MODE
Definition: ketypes.h:7
UNICODE_STRING SectionFileName
Definition: mmtypes.h:323
_SEH2_END
Definition: create.c:4400
struct _MEMORY_SECTION_NAME MEMORY_SECTION_NAME
DPRINT("Checking segment for file %wZ at offset 0x%I64X.\n", &Segment->FileObject->FileName, Offset->QuadPart)
#define NULL
Definition: types.h:112
_Must_inspect_result_ _In_ PLARGE_INTEGER _In_ PLARGE_INTEGER _In_ ULONG _In_ PFILE_OBJECT _In_ PVOID Process
Definition: fsrtlfuncs.h:219
#define _SEH2_EXCEPT(...)
Definition: pseh2_64.h:40
#define _SEH2_GetExceptionCode()
Definition: pseh2_64.h:165
_In_ HANDLE ProcessHandle
Definition: mmfuncs.h:403

Referenced by NtQueryVirtualMemory().

◆ MiRemoveFromSystemSpace()

ULONG NTAPI MiRemoveFromSystemSpace ( IN PMMSESSION  Session,
IN PVOID  Base,
OUT PCONTROL_AREA ControlArea 
)

Definition at line 2408 of file section.c.

2411 {
2412  ULONG Hash, Size, Count = 0;
2413  ULONG_PTR Entry;
2414  PAGED_CODE();
2415 
2416  /* Compute the hash for this entry and loop trying to find it */
2417  Entry = (ULONG_PTR)Base >> 16;
2418  Hash = Entry % Session->SystemSpaceHashKey;
2419  while ((Session->SystemSpaceViewTable[Hash].Entry >> 16) != Entry)
2420  {
2421  /* Check if we overflew past the end of the hash table */
2422  if (++Hash >= Session->SystemSpaceHashSize)
2423  {
2424  /* Reset the hash to zero and keep searching from the bottom */
2425  Hash = 0;
2426  if (++Count == 2)
2427  {
2428  /* But if we overflew twice, then this is not a real mapping */
2429  KeBugCheckEx(DRIVER_UNMAPPING_INVALID_VIEW,
2430  (ULONG_PTR)Base,
2431  1,
2432  0,
2433  0);
2434  }
2435  }
2436  }
2437 
2438  /* One less entry */
2439  Session->SystemSpaceHashEntries--;
2440 
2441  /* Extract the size and clear the entry */
2442  Size = Session->SystemSpaceViewTable[Hash].Entry & 0xFFFF;
2443  Session->SystemSpaceViewTable[Hash].Entry = 0;
2444 
2445  /* Return the control area and the size */
2446  *ControlArea = Session->SystemSpaceViewTable[Hash].ControlArea;
2447  return Size;
2448 }
static int Hash(const char *)
Definition: reader.c:2257
_In_opt_ ULONG Base
Definition: rtlfuncs.h:2413
IN PVOID IN PVOID IN USHORT IN USHORT Size
Definition: pci.h:361
uint32_t ULONG_PTR
Definition: typedefs.h:65
Entry
Definition: section.c:4944
int Count
Definition: noreturn.cpp:7
unsigned int ULONG
Definition: retypes.h:1
#define ULONG_PTR
Definition: config.h:101
base of all file and directory entries
Definition: entries.h:82
VOID NTAPI KeBugCheckEx(_In_ ULONG BugCheckCode, _In_ ULONG_PTR BugCheckParameter1, _In_ ULONG_PTR BugCheckParameter2, _In_ ULONG_PTR BugCheckParameter3, _In_ ULONG_PTR BugCheckParameter4)
Definition: rtlcompat.c:108
#define PAGED_CODE()

Referenced by MiUnmapViewInSystemSpace().

◆ MiRemoveMappedPtes()

VOID NTAPI MiRemoveMappedPtes ( IN PVOID  BaseAddress,
IN ULONG  NumberOfPtes,
IN PCONTROL_AREA  ControlArea,
IN PMMSUPPORT  Ws 
)

Definition at line 2306 of file section.c.

2310 {
2311  PMMPTE PointerPte, ProtoPte;//, FirstPte;
2312  PMMPDE PointerPde, SystemMapPde;
2313  PMMPFN Pfn1, Pfn2;
2314  MMPTE PteContents;
2315  KIRQL OldIrql;
2316  DPRINT("Removing mapped view at: 0x%p\n", BaseAddress);
2317 
2318  ASSERT(Ws == NULL);
2319 
2320  /* Get the PTE and loop each one */
2321  PointerPte = MiAddressToPte(BaseAddress);
2322  //FirstPte = PointerPte;
2323  while (NumberOfPtes)
2324  {
2325  /* Check if the PTE is already valid */
2326  PteContents = *PointerPte;
2327  if (PteContents.u.Hard.Valid == 1)
2328  {
2329  /* Get the PFN entry */
2330  Pfn1 = MiGetPfnEntry(PFN_FROM_PTE(&PteContents));
2331 
2332  /* Get the PTE */
2333  PointerPde = MiPteToPde(PointerPte);
2334 
2335  /* Lock the PFN database and make sure this isn't a mapped file */
2336  OldIrql = MiAcquirePfnLock();
2337  ASSERT(((Pfn1->u3.e1.PrototypePte) && (Pfn1->OriginalPte.u.Soft.Prototype)) == 0);
2338 
2339  /* Mark the page as modified accordingly */
2340  if (MI_IS_PAGE_DIRTY(&PteContents))
2341  Pfn1->u3.e1.Modified = 1;
2342 
2343  /* Was the PDE invalid */
2344  if (PointerPde->u.Long == 0)
2345  {
2346 #if (_MI_PAGING_LEVELS == 2)
2347  /* Find the system double-mapped PDE that describes this mapping */
2348  SystemMapPde = &MmSystemPagePtes[((ULONG_PTR)PointerPde & (SYSTEM_PD_SIZE - 1)) / sizeof(MMPTE)];
2349 
2350  /* Make it valid */
2351  ASSERT(SystemMapPde->u.Hard.Valid == 1);
2352  MI_WRITE_VALID_PDE(PointerPde, *SystemMapPde);
2353 #else
2354  DBG_UNREFERENCED_LOCAL_VARIABLE(SystemMapPde);
2355  ASSERT(FALSE);
2356 #endif
2357  }
2358 
2359  /* Dereference the PDE and the PTE */
2360  Pfn2 = MiGetPfnEntry(PFN_FROM_PTE(PointerPde));
2361  MiDecrementShareCount(Pfn2, PFN_FROM_PTE(PointerPde));
2363  MiDecrementShareCount(Pfn1, PFN_FROM_PTE(&PteContents));
2364 
2365  /* Release the PFN lock */
2366  MiReleasePfnLock(OldIrql);
2367  }
2368  else
2369  {
2370  /* Windows ASSERT */
2371  ASSERT((PteContents.u.Long == 0) || (PteContents.u.Soft.Prototype == 1));
2372 
2373  /* Check if this is a prototype pointer PTE */
2374  if (PteContents.u.Soft.Prototype == 1)
2375  {
2376  /* Get the prototype PTE */
2377  ProtoPte = MiProtoPteToPte(&PteContents);
2378 
2379  /* We don't support anything else atm */
2380  ASSERT(ProtoPte->u.Long == 0);
2381  }
2382  }
2383 
2384  /* Make the PTE into a zero PTE */
2385  PointerPte->u.Long = 0;
2386 
2387  /* Move to the next PTE */
2388  PointerPte++;
2389  NumberOfPtes--;
2390  }
2391 
2392  /* Flush the TLB */
2393  KeFlushCurrentTb();
2394 
2395  /* Acquire the PFN lock */
2396  OldIrql = MiAcquirePfnLock();
2397 
2398  /* Decrement the accounting counters */
2399  ControlArea->NumberOfUserReferences--;
2400  ControlArea->NumberOfMappedViews--;
2401 
2402  /* Check if we should destroy the CA and release the lock */
2403  MiCheckControlArea(ControlArea, OldIrql);
2404 }
USHORT Modified
Definition: mm.h:360
FORCEINLINE PMMPDE MiPteToPde(PMMPTE PointerPte)
Definition: mm.h:268
USHORT PrototypePte
Definition: mm.h:363
UCHAR KIRQL
Definition: env_spec_w32.h:591
MMPFNENTRY e1
Definition: mm.h:397
ASSERT(Segment->Locked)
#define MiAddressToPte(x)
Definition: mmx86.c:19
#define MiProtoPteToPte(x)
Definition: mm.h:316
return FALSE
Definition: section.c:5060
VOID NTAPI MiDecrementShareCount(IN PMMPFN Pfn1, IN PFN_NUMBER PageFrameIndex)
Definition: pfnlist.c:1133
FORCEINLINE VOID MI_WRITE_VALID_PDE(IN PMMPDE PointerPde, IN MMPDE TempPde)
Definition: miarm.h:1023
PMMPDE MmSystemPagePtes
Definition: init.c:41
#define DBG_UNREFERENCED_LOCAL_VARIABLE(L)
Definition: ntbasedef.h:319
_In_ HANDLE _Outptr_result_bytebuffer_ ViewSize PVOID * BaseAddress
Definition: mmfuncs.h:404
ULONG64 Valid
Definition: mmtypes.h:150
_Requires_lock_held_ Interrupt _Releases_lock_ Interrupt _In_ _IRQL_restores_ KIRQL OldIrql
Definition: kefuncs.h:792
Definition: mm.h:373
ULONG64 Prototype
Definition: mmtypes.h:89
FORCEINLINE PMMPFN MiGetPfnEntry(IN PFN_NUMBER Pfn)
Definition: mm.h:1047
union _MMPFN::@1753 u3
ULONG_PTR Long
Definition: mmtypes.h:215
MMPTE_HARDWARE Hard
Definition: mmtypes.h:217
#define SYSTEM_PD_SIZE
Definition: miarm.h:32
DPRINT("Checking segment for file %wZ at offset 0x%I64X.\n", &Segment->FileObject->FileName, Offset->QuadPart)
MMPTE_SOFTWARE Soft
Definition: mmtypes.h:219
#define NULL
Definition: types.h:112
MMPTE OriginalPte
Definition: mm.h:407
VOID NTAPI MiCheckControlArea(IN PCONTROL_AREA ControlArea, IN KIRQL OldIrql)
Definition: section.c:732
#define MI_IS_PAGE_DIRTY(x)
Definition: mm.h:112
#define ULONG_PTR
Definition: config.h:101
union _MMPTE::@2284 u
#define PFN_FROM_PTE(v)
Definition: mm.h:92
VOID NTAPI KeFlushCurrentTb(VOID)
Definition: cpu.c:347

Referenced by MiUnmapViewInSystemSpace().

◆ MiRemoveMappedView()

VOID NTAPI MiRemoveMappedView ( IN PEPROCESS  CurrentProcess,
IN PMMVAD  Vad 
)

Definition at line 784 of file section.c.

786 {
787  KIRQL OldIrql;
788  PCONTROL_AREA ControlArea;
789  PETHREAD CurrentThread = PsGetCurrentThread();
790 
791  /* Get the control area */
792  ControlArea = Vad->ControlArea;
793 
794  /* We only support non-extendable, non-image, pagefile-backed regular sections */
795  ASSERT(Vad->u.VadFlags.VadType == VadNone);
796  ASSERT(Vad->u2.VadFlags2.ExtendableFile == FALSE);
797  ASSERT(ControlArea);
798  ASSERT(ControlArea->FilePointer == NULL);
799 
800  /* Delete the actual virtual memory pages */
801  MiDeleteVirtualAddresses(Vad->StartingVpn << PAGE_SHIFT,
802  (Vad->EndingVpn << PAGE_SHIFT) | (PAGE_SIZE - 1),
803  Vad);
804 
805  /* Release the working set */
807 
808  /* Lock the PFN database */
809  OldIrql = MiAcquirePfnLock();
810 
811  /* Remove references */
812  ControlArea->NumberOfMappedViews--;
813  ControlArea->NumberOfUserReferences--;
814 
815  /* Check if it should be destroyed */
816  MiCheckControlArea(ControlArea, OldIrql);
817 }
#define PAGE_SHIFT
Definition: env_spec_w32.h:45
PFILE_OBJECT FilePointer
Definition: mmtypes.h:530
FORCEINLINE VOID MiUnlockProcessWorkingSetUnsafe(IN PEPROCESS Process, IN PETHREAD Thread)
Definition: miarm.h:1244
#define PsGetCurrentThread()
Definition: env_spec_w32.h:81
UCHAR KIRQL
Definition: env_spec_w32.h:591
ASSERT(Segment->Locked)
return FALSE
Definition: section.c:5060
ULONG CurrentProcess
Definition: shell.c:125
_Requires_lock_held_ Interrupt _Releases_lock_ Interrupt _In_ _IRQL_restores_ KIRQL OldIrql
Definition: kefuncs.h:792
#define PAGE_SIZE
Definition: env_spec_w32.h:49
ULONG NumberOfMappedViews
Definition: mmtypes.h:522
VOID NTAPI MiDeleteVirtualAddresses(IN ULONG_PTR Va, IN ULONG_PTR EndingAddress, IN PMMVAD Vad)
Definition: virtual.c:530
ULONG NumberOfUserReferences
Definition: mmtypes.h:524
#define NULL
Definition: types.h:112
VOID NTAPI MiCheckControlArea(IN PCONTROL_AREA ControlArea, IN KIRQL OldIrql)
Definition: section.c:732

Referenced by MiUnmapViewOfSection(), and MmCleanProcessAddressSpace().

◆ MiSegmentDelete()

VOID NTAPI MiSegmentDelete ( IN PSEGMENT  Segment)

Definition at line 609 of file section.c.

610 {
611  PCONTROL_AREA ControlArea;
612  SEGMENT_FLAGS SegmentFlags;
613  PSUBSECTION Subsection;
614  PMMPTE PointerPte, LastPte, PteForProto;
615  PMMPFN Pfn1;
616  PFN_NUMBER PageFrameIndex;
617  MMPTE TempPte;
618  KIRQL OldIrql;
619 
620  /* Capture data */
621  SegmentFlags = Segment->SegmentFlags;
622  ControlArea = Segment->ControlArea;
623 
624  /* Make sure control area is on the right delete path */
625  ASSERT(ControlArea->u.Flags.BeingDeleted == 1);
626  ASSERT(ControlArea->WritableUserReferences == 0);
627 
628  /* These things are not supported yet */
629  ASSERT(ControlArea->DereferenceList.Flink == NULL);
630  ASSERT(!(ControlArea->u.Flags.Image) && !(ControlArea->u.Flags.File));
631  ASSERT(ControlArea->u.Flags.GlobalOnlyPerSession == 0);
632  ASSERT(ControlArea->u.Flags.Rom == 0);
633 
634  /* Get the subsection and PTEs for this segment */
635  Subsection = (PSUBSECTION)(ControlArea + 1);
636  PointerPte = Subsection->SubsectionBase;
637  LastPte = PointerPte + Segment->NonExtendedPtes;
638 
639  /* Lock the PFN database */
640  OldIrql = MiAcquirePfnLock();
641 
642  /* Check if the master PTE is invalid */
643  PteForProto = MiAddressToPte(PointerPte);
644  if (!PteForProto->u.Hard.Valid)
645  {
646  /* Fault it in */
648  }
649 
650  /* Loop all the segment PTEs */
651  while (PointerPte < LastPte)
652  {
653  /* Check if it's time to switch master PTEs if we passed a PDE boundary */
654  if (MiIsPteOnPdeBoundary(PointerPte) &&
655  (PointerPte != Subsection->SubsectionBase))
656  {
657  /* Check if the master PTE is invalid */
658  PteForProto = MiAddressToPte(PointerPte);
659  if (!PteForProto->u.Hard.Valid)
660  {
661  /* Fault it in */
663  }
664  }
665 
666  /* This should be a prototype PTE */
667  TempPte = *PointerPte;
668  ASSERT(SegmentFlags.LargePages == 0);
669  ASSERT(TempPte.u.Hard.Valid == 0);
670 
671  /* See if we should clean things up */
672  if (!(ControlArea->u.Flags.Image) && !(ControlArea->u.Flags.File))
673  {
674  /*
675  * This is a section backed by the pagefile. Now that it doesn't exist anymore,
676  * we can give everything back to the system.
677  */
678  ASSERT(TempPte.u.Soft.Prototype == 0);
679 
680  if (TempPte.u.Soft.Transition == 1)
681  {
682  /* We can give the page back for other use */
683  DPRINT("Releasing page for transition PTE %p\n", PointerPte);
684  PageFrameIndex = PFN_FROM_PTE(&TempPte);
685  Pfn1 = MI_PFN_ELEMENT(PageFrameIndex);
686 
687  /* As this is a paged-backed section, nobody should reference it anymore (no cache or whatever) */
688  ASSERT(Pfn1->u3.ReferenceCount == 0);
689 
690  /* And it should be in standby or modified list */
692 
693  /* Unlink it and put it back in free list */
694  MiUnlinkPageFromList(Pfn1);
695 
696  /* Temporarily mark this as active and make it free again */
698  MI_SET_PFN_DELETED(Pfn1);
699 
700  MiInsertPageInFreeList(PageFrameIndex);
701  }
702  else if (TempPte.u.Soft.PageFileHigh != 0)
703  {
704  /* Should not happen for now */
705  ASSERT(FALSE);
706  }
707  }
708  else
709  {
710  /* unsupported for now */
711  ASSERT(FALSE);
712 
713  /* File-backed section must have prototype PTEs */
714  ASSERT(TempPte.u.Soft.Prototype == 1);
715  }
716 
717  /* Zero the PTE and keep going */
718  PointerPte->u.Long = 0;
719  PointerPte++;
720  }
721 
722  /* Release the PFN lock */
723  MiReleasePfnLock(OldIrql);
724 
725  /* Free the structures */
726  ExFreePool(ControlArea);
728 }
ULONG NTAPI MiMakeSystemAddressValidPfn(IN PVOID VirtualAddress, IN KIRQL OldIrql)
Definition: virtual.c:235
VOID NTAPI MiInsertPageInFreeList(IN PFN_NUMBER PageFrameIndex)
Definition: pfnlist.c:603
VOID NTAPI MiUnlinkPageFromList(IN PMMPFN Pfn)
Definition: pfnlist.c:265
union _CONTROL_AREA::@2558 u
ULONG LargePages
Definition: mmtypes.h:400
USHORT ReferenceCount
Definition: mm.h:396
USHORT PageLocation
Definition: mm.h:365
UCHAR KIRQL
Definition: env_spec_w32.h:591
MMPFNENTRY e1
Definition: mm.h:397
ASSERT(Segment->Locked)
#define MiAddressToPte(x)
Definition: mmx86.c:19
ULONG PFN_NUMBER
Definition: ke.h:9
return FALSE
Definition: section.c:5060
_Inout_ PVOID Segment
Definition: exfuncs.h:1101
LIST_ENTRY DereferenceList
Definition: mmtypes.h:519
struct _LIST_ENTRY * Flink
Definition: typedefs.h:121
ULONG64 Valid
Definition: mmtypes.h:150
HARDWARE_PTE_ARMV6 TempPte
Definition: winldr.c:76
struct _SUBSECTION * PSUBSECTION
FORCEINLINE PMMPFN MI_PFN_ELEMENT(IN PFN_NUMBER Pfn)
Definition: miarm.h:1579
_Requires_lock_held_ Interrupt _Releases_lock_ Interrupt _In_ _IRQL_restores_ KIRQL OldIrql
Definition: kefuncs.h:792
Definition: mm.h:373
ULONG GlobalOnlyPerSession
Definition: mmtypes.h:488
union _MMPFN::@1753 u3
ULONG_PTR Long
Definition: mmtypes.h:215
MMPTE_HARDWARE Hard
Definition: mmtypes.h:217
#define MI_SET_PFN_DELETED(x)
Definition: miarm.h:194
#define MiIsPteOnPdeBoundary(PointerPte)
Definition: mm.h:306
ULONG BeingDeleted
Definition: mmtypes.h:460
ULONG WritableUserReferences
Definition: mmtypes.h:534
DPRINT("Checking segment for file %wZ at offset 0x%I64X.\n", &Segment->FileObject->FileName, Offset->QuadPart)
#define NULL
Definition: types.h:112
MMSECTION_FLAGS Flags
Definition: mmtypes.h:528
union _MMPTE::@2284 u
#define PFN_FROM_PTE(v)
Definition: mm.h:92
PMMPTE SubsectionBase
Definition: mmtypes.h:578
#define ExFreePool(addr)
Definition: env_spec_w32.h:352

Referenced by MiCheckControlArea().

◆ MiSessionCommitPageTables()

NTSTATUS NTAPI MiSessionCommitPageTables ( IN PVOID  StartVa,
IN PVOID  EndVa 
)

Definition at line 942 of file section.c.

944 {
945  KIRQL OldIrql;
946  ULONG Color, Index;
947  PMMPDE StartPde, EndPde;
949  PMMPFN Pfn1;
950  PFN_NUMBER PageCount = 0, ActualPages = 0, PageFrameNumber;
951 
952  /* Windows sanity checks */
953  ASSERT(StartVa >= (PVOID)MmSessionBase);
954  ASSERT(EndVa < (PVOID)MiSessionSpaceEnd);
955  ASSERT(PAGE_ALIGN(EndVa) == EndVa);
956 
957  /* Get the start and end PDE, then loop each one */
958  StartPde = MiAddressToPde(StartVa);
959  EndPde = MiAddressToPde((PVOID)((ULONG_PTR)EndVa - 1));
960  Index = ((ULONG_PTR)StartVa - (ULONG_PTR)MmSessionBase) >> 22;
961  while (StartPde <= EndPde)
962  {
963 #ifndef _M_AMD64
964  /* If we don't already have a page table for it, increment count */
965  if (MmSessionSpace->PageTables[Index].u.Long == 0) PageCount++;
966 #endif
967  /* Move to the next one */
968  StartPde++;
969  Index++;
970  }
971 
972  /* If there's no page tables to create, bail out */
973  if (PageCount == 0) return STATUS_SUCCESS;
974 
975  /* Reset the start PDE and index */
976  StartPde = MiAddressToPde(StartVa);
977  Index = ((ULONG_PTR)StartVa - (ULONG_PTR)MmSessionBase) >> 22;
978 
979  /* Loop each PDE while holding the working set lock */
980 // MiLockWorkingSet(PsGetCurrentThread(),
981 // &MmSessionSpace->GlobalVirtualAddress->Vm);
982 #ifdef _M_AMD64
983 _WARN("MiSessionCommitPageTables halfplemented for amd64")
988  DBG_UNREFERENCED_LOCAL_VARIABLE(PageFrameNumber);
989  ASSERT(FALSE);
990 #else
991  while (StartPde <= EndPde)
992  {
993  /* Check if we already have a page table */
994  if (MmSessionSpace->PageTables[Index].u.Long == 0)
995  {
996  /* We don't, so the PDE shouldn't be ready yet */
997  ASSERT(StartPde->u.Hard.Valid == 0);
998 
999  /* ReactOS check to avoid MiEnsureAvailablePageOrWait */
1000  ASSERT(MmAvailablePages >= 32);
1001 
1002  /* Acquire the PFN lock and grab a zero page */
1003  OldIrql = MiAcquirePfnLock();
1005  MI_SET_PROCESS2(PsGetCurrentProcess()->ImageFileName);
1007  PageFrameNumber = MiRemoveZeroPage(Color);
1008  TempPde.u.Hard.PageFrameNumber = PageFrameNumber;
1009  MI_WRITE_VALID_PDE(StartPde, TempPde);
1010 
1011  /* Write the page table in session space structure */
1014 
1015  /* Initialize the PFN */
1016  MiInitializePfnForOtherProcess(PageFrameNumber,
1017  StartPde,
1019 
1020  /* And now release the lock */
1021  MiReleasePfnLock(OldIrql);
1022 
1023  /* Get the PFN entry and make sure there's no event for it */
1024  Pfn1 = MI_PFN_ELEMENT(PageFrameNumber);
1025  ASSERT(Pfn1->u1.Event == NULL);
1026 
1027  /* Increment the number of pages */
1028  ActualPages++;
1029  }
1030 
1031  /* Move to the next PDE */
1032  StartPde++;
1033  Index++;
1034  }
1035 #endif
1036 
1037  /* Make sure we didn't do more pages than expected */
1038  ASSERT(ActualPages <= PageCount);
1039 
1040  /* Release the working set lock */
1041 // MiUnlockWorkingSet(PsGetCurrentThread(),
1042 // &MmSessionSpace->GlobalVirtualAddress->Vm);
1043 
1044 
1045  /* If we did at least one page... */
1046  if (ActualPages)
1047  {
1048  /* Update the performance counters! */
1051  }
1052 
1053  /* Return status */
1054  return STATUS_SUCCESS;
1055 }
SIZE_T NonPageablePages
Definition: miarm.h:486
#define MiAddressToPde(x)
Definition: mmx86.c:20
PMMPDE PageTables
Definition: miarm.h:512
HARDWARE_PDE_ARMV6 TempPde
Definition: winldr.c:78
PMM_SESSION_SPACE MmSessionSpace
Definition: session.c:21
VOID NTAPI MiInitializePfnForOtherProcess(IN PFN_NUMBER PageFrameIndex, IN PVOID PteAddress, IN PFN_NUMBER PteFrame)
Definition: pfnlist.c:1282
PFN_NUMBER MmAvailablePages
Definition: freelist.c:26
struct Color Color
PFN_NUMBER NTAPI MiRemoveZeroPage(IN ULONG Color)
Definition: pfnlist.c:533
uint32_t ULONG_PTR
Definition: typedefs.h:65
UCHAR KIRQL
Definition: env_spec_w32.h:591
PVOID MmSessionBase
Definition: init.c:33
ASSERT(Segment->Locked)
ULONG PFN_NUMBER
Definition: ke.h:9
#define _WARN(msg)
Definition: debug.h:263
#define MI_SET_PROCESS2(x)
Definition: mm.h:319
#define PsGetCurrentProcess
Definition: psfuncs.h:17
ULONG MmSecondaryColorMask
Definition: mminit.c:257
return FALSE
Definition: section.c:5060
FORCEINLINE VOID MI_WRITE_VALID_PDE(IN PMMPDE PointerPde, IN MMPDE TempPde)
Definition: miarm.h:1023
#define MI_SET_USAGE(x)
Definition: mm.h:317
#define DBG_UNREFERENCED_LOCAL_VARIABLE(L)
Definition: ntbasedef.h:319
ULONG PageFrameNumber
Definition: mmtypes.h:74
SIZE_T CommittedPages
Definition: miarm.h:487
_In_ WDFCOLLECTION _In_ ULONG Index
ULONG64 Valid
Definition: mmtypes.h:150
PVOID MiSessionSpaceEnd
Definition: init.c:27
#define PAGE_ALIGN(Va)
#define InterlockedExchangeAddSizeT(a, b)
Definition: interlocked.h:196
FORCEINLINE PMMPFN MI_PFN_ELEMENT(IN PFN_NUMBER Pfn)
Definition: miarm.h:1579
_Requires_lock_held_ Interrupt _Releases_lock_ Interrupt _In_ _IRQL_restores_ KIRQL OldIrql
Definition: kefuncs.h:792
Definition: mm.h:373
MMPTE ValidKernelPdeLocal
Definition: init.c:32
ULONG_PTR Long
Definition: mmtypes.h:215
MMPTE_HARDWARE Hard
Definition: mmtypes.h:217
#define NULL
Definition: types.h:112
unsigned int ULONG
Definition: retypes.h:1
#define ULONG_PTR
Definition: config.h:101
union _MMPTE::@2284 u
#define STATUS_SUCCESS
Definition: shellext.h:65
PFN_NUMBER SessionPageDirectoryIndex
Definition: miarm.h:485

Referenced by MiMapViewInSystemSpace().

◆ MiSetControlAreaSymbolsLoaded()

VOID NTAPI MiSetControlAreaSymbolsLoaded ( IN PCONTROL_AREA  ControlArea)

Definition at line 1170 of file section.c.

1171 {
1172  KIRQL OldIrql;
1173 
1175 
1176  OldIrql = MiAcquirePfnLock();
1177  ControlArea->u.Flags.DebugSymbolsLoaded |= 1;
1178 
1179  ASSERT(OldIrql <= APC_LEVEL);
1180  MiReleasePfnLock(OldIrql);
1182 }
#define KeGetCurrentIrql()
Definition: env_spec_w32.h:706
UCHAR KIRQL
Definition: env_spec_w32.h:591
ASSERT(Segment->Locked)
_Requires_lock_held_ Interrupt _Releases_lock_ Interrupt _In_ _IRQL_restores_ KIRQL OldIrql
Definition: kefuncs.h:792
#define APC_LEVEL
Definition: env_spec_w32.h:695

◆ MiSetProtectionOnSection()

NTSTATUS NTAPI MiSetProtectionOnSection ( IN PEPROCESS  Process,
IN PMMVAD  FoundVad,
IN PVOID  StartingAddress,
IN PVOID  EndingAddress,
IN ULONG  NewProtect,
OUT PULONG  CapturedOldProtect,
IN ULONG  DontCharge,
OUT PULONG  Locked 
)

Definition at line 2137 of file section.c.

2145 {
2146  PMMPTE PointerPte, LastPte;
2147  MMPTE TempPte, PteContents;
2148  PMMPDE PointerPde;
2149  PMMPFN Pfn1;
2150  ULONG ProtectionMask, QuotaCharge = 0;
2152  PAGED_CODE();
2153 
2154  //
2155  // Tell caller nothing is being locked
2156  //
2157  *Locked = FALSE;
2158 
2159  //
2160  // This function should only be used for section VADs. Windows ASSERT */
2161  //
2162  ASSERT(FoundVad->u.VadFlags.PrivateMemory == 0);
2163 
2164  //
2165  // We don't support these features in ARM3
2166  //
2167  ASSERT(FoundVad->u.VadFlags.VadType != VadImageMap);
2168  ASSERT(FoundVad->u2.VadFlags2.CopyOnWrite == 0);
2169 
2170  //
2171  // Convert and validate the protection mask
2172  //
2173  ProtectionMask = MiMakeProtectionMask(NewProtect);
2174  if (ProtectionMask == MM_INVALID_PROTECTION)
2175  {
2176  DPRINT1("Invalid section protect\n");
2178  }
2179 
2180  //
2181  // Get the PTE and PDE for the address, as well as the final PTE
2182  //
2184  PointerPde = MiAddressToPde(StartingAddress);
2185  PointerPte = MiAddressToPte(StartingAddress);
2186  LastPte = MiAddressToPte(EndingAddress);
2187 
2188  //
2189  // Make the PDE valid, and check the status of the first PTE
2190  //
2192  if (PointerPte->u.Long)
2193  {
2194  //
2195  // Not supported in ARM3
2196  //
2197  ASSERT(FoundVad->u.VadFlags.VadType != VadRotatePhysical);
2198 
2199  //
2200  // Capture the page protection and make the PDE valid
2201  //
2202  *CapturedOldProtect = MiGetPageProtection(PointerPte);
2204  }
2205  else
2206  {
2207  //
2208  // Only pagefile-backed section VADs are supported for now
2209  //
2210  ASSERT(FoundVad->u.VadFlags.VadType != VadImageMap);
2211 
2212  //
2213  // Grab the old protection from the VAD itself
2214  //
2215  *CapturedOldProtect = MmProtectToValue[FoundVad->u.VadFlags.Protection];
2216  }
2217 
2218  //
2219  // Loop all the PTEs now
2220  //
2222  while (PointerPte <= LastPte)
2223  {
2224  //
2225  // Check if we've crossed a PDE boundary and make the new PDE valid too
2226  //
2227  if (MiIsPteOnPdeBoundary(PointerPte))
2228  {
2229  PointerPde = MiPteToPde(PointerPte);
2231  }
2232 
2233  //
2234  // Capture the PTE and see what we're dealing with
2235  //
2236  PteContents = *PointerPte;
2237  if (PteContents.u.Long == 0)
2238  {
2239  //
2240  // This used to be a zero PTE and it no longer is, so we must add a
2241  // reference to the pagetable.
2242  //
2244 
2245  //
2246  // Create the demand-zero prototype PTE
2247  //
2249  TempPte.u.Soft.Protection = ProtectionMask;
2250  MI_WRITE_INVALID_PTE(PointerPte, TempPte);
2251  }
2252  else if (PteContents.u.Hard.Valid == 1)
2253  {
2254  //
2255  // Get the PFN entry
2256  //
2257  Pfn1 = MiGetPfnEntry(PFN_FROM_PTE(&PteContents));
2258 
2259  //
2260  // We don't support these yet
2261  //
2262  ASSERT((NewProtect & (PAGE_NOACCESS | PAGE_GUARD)) == 0);
2263  ASSERT(Pfn1->u3.e1.PrototypePte == 0);
2264 
2265  //
2266  // Write the protection mask and write it with a TLB flush
2267  //
2268  Pfn1->OriginalPte.u.Soft.Protection = ProtectionMask;
2269  MiFlushTbAndCapture(FoundVad,
2270  PointerPte,
2271  ProtectionMask,
2272  Pfn1,
2273  TRUE);
2274  }
2275  else
2276  {
2277  //
2278  // We don't support these cases yet
2279  //
2280  ASSERT(PteContents.u.Soft.Prototype == 0);
2281  ASSERT(PteContents.u.Soft.Transition == 0);
2282 
2283  //
2284  // The PTE is already demand-zero, just update the protection mask
2285  //
2286  PointerPte->u.Soft.Protection = ProtectionMask;
2287  }
2288 
2289  PointerPte++;
2290  }
2291 
2292  //
2293  // Unlock the working set and update quota charges if needed, then return
2294  //
2296  if ((QuotaCharge > 0) && (!DontCharge))
2297  {
2298  FoundVad->u.VadFlags.CommitCharge -= QuotaCharge;
2299  Process->CommitCharge -= QuotaCharge;
2300  }
2301  return STATUS_SUCCESS;
2302 }
#define MM_INVALID_PROTECTION
Definition: miarm.h:67
MMPTE PrototypePte
Definition: init.c:40
FORCEINLINE VOID MiUnlockProcessWorkingSetUnsafe(IN PEPROCESS Process, IN PETHREAD Thread)
Definition: miarm.h:1244
#define MiAddressToPde(x)
Definition: mmx86.c:20
#define PsGetCurrentThread()
Definition: env_spec_w32.h:81
#define TRUE
Definition: types.h:120
#define PAGE_GUARD
Definition: nt_native.h:1310
FORCEINLINE PMMPDE MiPteToPde(PMMPTE PointerPte)
Definition: mm.h:268
USHORT PrototypePte
Definition: mm.h:363
MMPFNENTRY e1
Definition: mm.h:397
const ULONG MmProtectToValue[32]
Definition: page.c:71
ASSERT(Segment->Locked)
#define MiAddressToPte(x)
Definition: mmx86.c:19
#define MM_NOIRQL
Definition: mm.h:70
_In_ PMEMORY_AREA _In_ PVOID _In_ BOOLEAN Locked
Definition: newmm.h:207
#define PAGE_NOACCESS
Definition: nt_native.h:1302
VOID NTAPI MiMakePdeExistAndMakeValid(IN PMMPDE PointerPde, IN PEPROCESS TargetProcess, IN KIRQL OldIrql)
Definition: virtual.c:2475
return FALSE
Definition: section.c:5060
ULONG64 Protection
Definition: mmtypes.h:88
FORCEINLINE VOID MiLockProcessWorkingSetUnsafe(IN PEPROCESS Process, IN PETHREAD Thread)
Definition: miarm.h:1174
ULONG NTAPI MiMakeProtectionMask(IN ULONG Protect)
Definition: section.c:158
ULONG64 Valid
Definition: mmtypes.h:150
_In_opt_ PFILE_OBJECT _In_opt_ PETHREAD Thread
Definition: fltkernel.h:2652
HARDWARE_PTE_ARMV6 TempPte
Definition: winldr.c:76
FORCEINLINE USHORT MiIncrementPageTableReferences(IN PVOID Address)
Definition: miarm.h:2486
Definition: mm.h:373
ULONG64 Prototype
Definition: mmtypes.h:89
#define STATUS_INVALID_PAGE_PROTECTION
Definition: ntstatus.h:305
FORCEINLINE PMMPFN MiGetPfnEntry(IN PFN_NUMBER Pfn)
Definition: mm.h:1047
union _MMPFN::@1753 u3
ULONG_PTR Long
Definition: mmtypes.h:215
MMPTE_HARDWARE Hard
Definition: mmtypes.h:217
FORCEINLINE VOID MI_WRITE_INVALID_PTE(IN PMMPTE PointerPte, IN MMPTE InvalidPte)
Definition: miarm.h:997
#define MiIsPteOnPdeBoundary(PointerPte)
Definition: mm.h:306
ULONG64 Transition
Definition: mmtypes.h:90
ULONG NTAPI MiGetPageProtection(IN PMMPTE PointerPte)
Definition: virtual.c:1353
_Must_inspect_result_ _In_ ULONG NewProtect
Definition: mmfuncs.h:682
MMPTE_SOFTWARE Soft
Definition: mmtypes.h:219
MMPTE OriginalPte
Definition: mm.h:407
#define DPRINT1
Definition: precomp.h:8
_Must_inspect_result_ _In_ PLARGE_INTEGER _In_ PLARGE_INTEGER _In_ ULONG _In_ PFILE_OBJECT _In_ PVOID Process
Definition: fsrtlfuncs.h:219
unsigned int ULONG
Definition: retypes.h:1
union _MMPTE::@2284 u
#define STATUS_SUCCESS
Definition: shellext.h:65
VOID NTAPI MiFlushTbAndCapture(IN PMMVAD FoundVad, IN PMMPTE PointerPte, IN ULONG ProtectionMask, IN PMMPFN Pfn1, IN BOOLEAN UpdateDirty)
Definition: section.c:2033
FORCEINLINE PVOID MiPteToAddress(PMMPTE PointerPte)
Definition: mm.h:208
#define PFN_FROM_PTE(v)
Definition: mm.h:92
#define PAGED_CODE()

◆ MiSubsectionConsistent()

VOID NTAPI MiSubsectionConsistent ( IN PSUBSECTION  Subsection)

Definition at line 1537 of file section.c.

1538 {
1539  /* ReactOS only supports systems with 4K pages and 4K sectors */
1540  ASSERT(Subsection->u.SubsectionFlags.SectorEndOffset == 0);
1541 
1542  /* Therefore, then number of PTEs should be equal to the number of sectors */
1543  if (Subsection->NumberOfFullSectors != Subsection->PtesInSubsection)
1544  {
1545  /* Break and warn if this is inconsistent */
1546  DPRINT1("Mm: Subsection inconsistent (%x vs %x)\n",
1547  Subsection->NumberOfFullSectors, Subsection->PtesInSubsection);
1548  DbgBreakPoint();
1549  }
1550 }
ASSERT(Segment->Locked)
VOID NTAPI DbgBreakPoint(VOID)
#define DPRINT1
Definition: precomp.h:8

◆ MiUnmapViewInSystemSpace()

NTSTATUS NTAPI MiUnmapViewInSystemSpace ( IN PMMSESSION  Session,
IN PVOID  MappedBase 
)

Definition at line 2452 of file section.c.

2454 {
2455  ULONG Size;
2456  PCONTROL_AREA ControlArea;
2457  PAGED_CODE();
2458 
2459  /* Remove this mapping */
2460  KeAcquireGuardedMutex(Session->SystemSpaceViewLockPointer);
2461  Size = MiRemoveFromSystemSpace(Session, MappedBase, &ControlArea);
2462 
2463  /* Clear the bits for this mapping */
2464  RtlClearBits(Session->SystemSpaceBitMap,
2465  (ULONG)(((ULONG_PTR)MappedBase - (ULONG_PTR)Session->SystemSpaceViewStart) >> 16),
2466  Size);
2467 
2468  /* Convert the size from a bit size into the actual size */
2469  Size = Size * (_64K >> PAGE_SHIFT);
2470 
2471  /* Remove the PTEs now */
2472  MiRemoveMappedPtes(MappedBase, Size, ControlArea, NULL);
2473  KeReleaseGuardedMutex(Session->SystemSpaceViewLockPointer);
2474 
2475  /* Return success */
2476  return STATUS_SUCCESS;
2477 }
#define PAGE_SHIFT
Definition: env_spec_w32.h:45
VOID FASTCALL KeAcquireGuardedMutex(IN PKGUARDED_MUTEX GuardedMutex)
Definition: gmutex.c:42
VOID NTAPI MiRemoveMappedPtes(IN PVOID BaseAddress, IN ULONG NumberOfPtes, IN PCONTROL_AREA ControlArea, IN PMMSUPPORT Ws)
Definition: section.c:2306
IN PVOID IN PVOID IN USHORT IN USHORT Size
Definition: pci.h:361
uint32_t ULONG_PTR
Definition: typedefs.h:65
ULONG NTAPI MiRemoveFromSystemSpace(IN PMMSESSION Session, IN PVOID Base, OUT PCONTROL_AREA *ControlArea)
Definition: section.c:2408
#define _64K
Definition: miarm.h:23
NTSYSAPI void WINAPI RtlClearBits(PRTL_BITMAP, ULONG, ULONG)
#define NULL
Definition: types.h:112
VOID FASTCALL KeReleaseGuardedMutex(IN OUT PKGUARDED_MUTEX GuardedMutex)
Definition: gmutex.c:53
_Must_inspect_result_ _Outptr_result_bytebuffer_ ViewSize PVOID * MappedBase
Definition: mmfuncs.h:492
unsigned int ULONG
Definition: retypes.h:1
#define STATUS_SUCCESS
Definition: shellext.h:65
#define PAGED_CODE()

Referenced by MmUnmapViewInSessionSpace(), and MmUnmapViewInSystemSpace().

◆ MiUnmapViewOfSection()

NTSTATUS NTAPI MiUnmapViewOfSection ( IN PEPROCESS  Process,
IN PVOID  BaseAddress,
IN ULONG  Flags 
)

Definition at line 821 of file section.c.

824 {
828  PMMVAD Vad;
829  PVOID DbgBase = NULL;
832  PETHREAD CurrentThread = PsGetCurrentThread();
834  PAGED_CODE();
835 
836  /* Check if we need to lock the address space */
837  if (!Flags) MmLockAddressSpace(&Process->Vm);
838 
839  /* Check for Mm Region */
842  {
843  /* Call Mm API */
845  if (!Flags) MmUnlockAddressSpace(&Process->Vm);
846  return Status;
847  }
848 
849  /* Check if we should attach to the process */
850  if (CurrentProcess != Process)
851  {
852  /* The process is different, do an attach */
854  Attached = TRUE;
855  }
856 
857  /* Check if the process is already dead */
858  if (Process->VmDeleted)
859  {
860  /* Fail the call */
861  DPRINT1("Process died!\n");
862  if (!Flags) MmUnlockAddressSpace(&Process->Vm);
864  goto Quickie;
865  }
866 
867  /* Find the VAD for the address and make sure it's a section VAD */
869  if (!(Vad) || (Vad->u.VadFlags.PrivateMemory))
870  {
871  /* Couldn't find it, or invalid VAD, fail */
872  DPRINT1("No VAD or invalid VAD\n");
873  if (!Flags) MmUnlockAddressSpace(&Process->Vm);
875  goto Quickie;
876  }
877 
878  /* We should be attached */
880 
881  /* We need the base address for the debugger message on image-backed VADs */
882  if (Vad->u.VadFlags.VadType == VadImageMap)
883  {
884  DbgBase = (PVOID)(Vad->StartingVpn >> PAGE_SHIFT);
885  }
886 
887  /* Compute the size of the VAD region */
888  RegionSize = PAGE_SIZE + ((Vad->EndingVpn - Vad->StartingVpn) << PAGE_SHIFT);
889 
890  /* For SEC_NO_CHANGE sections, we need some extra checks */
891  if (Vad->u.VadFlags.NoChange == 1)
892  {
893  /* Are we allowed to mess with this VAD? */
895  (PVOID)(Vad->StartingVpn >> PAGE_SHIFT),
896  RegionSize,
898  if (!NT_SUCCESS(Status))
899  {
900  /* We failed */
901  DPRINT1("Trying to unmap protected VAD!\n");
902  if (!Flags) MmUnlockAddressSpace(&Process->Vm);
903  goto Quickie;
904  }
905  }
906 
907  /* Not currently supported */
909 
910  /* FIXME: Remove VAD charges */
911 
912  /* Lock the working set */
913  MiLockProcessWorkingSetUnsafe(Process, CurrentThread);
914 
915  /* Remove the VAD */
916  ASSERT(Process->VadRoot.NumberGenericTableElements >= 1);
917  MiRemoveNode((PMMADDRESS_NODE)Vad, &Process->VadRoot);
919 
920  /* Remove the PTEs for this view, which also releases the working set lock */
922 
923  /* FIXME: Remove commitment */
924 
925  /* Update performance counter and release the lock */
926  Process->VirtualSize -= RegionSize;
927  if (!Flags) MmUnlockAddressSpace(&Process->Vm);
928 
929  /* Destroy the VAD and return success */
930  ExFreePool(Vad);
932 
933  /* Failure and success case -- send debugger message, detach, and return */
934 Quickie:
935  if (DbgBase) DbgkUnMapViewOfSection(DbgBase);
937  return Status;
938 }
#define PAGE_SHIFT
Definition: env_spec_w32.h:45
KAPC_STATE
Definition: ketypes.h:1285
ULONG Type
Definition: mm.h:251
#define PsGetCurrentThread()
Definition: env_spec_w32.h:81
#define TRUE
Definition: types.h:120
FORCEINLINE VOID MmUnlockAddressSpace(PMMSUPPORT AddressSpace)
Definition: mm.h:1666
LONG NTSTATUS
Definition: precomp.h:26
VOID NTAPI MiRemoveMappedView(IN PEPROCESS CurrentProcess, IN PMMVAD Vad)
Definition: section.c:784
PMEMORY_AREA NTAPI MmLocateMemoryAreaByAddress(PMMSUPPORT AddressSpace, PVOID Address)
Definition: marea.c:60
ULONG_PTR NoChange
Definition: mmtypes.h:690
MMVAD_FLAGS VadFlags
Definition: mmtypes.h:731
#define MM_DELETE_CHECK
Definition: miarm.h:261
ULONG_PTR EndingVpn
Definition: mmtypes.h:727
ASSERT(Segment->Locked)
static BOOL Attached
Definition: vidbios.c:3905
#define MEMORY_AREA_OWNED_BY_ARM3
Definition: mm.h:97
VOID NTAPI KeStackAttachProcess(IN PKPROCESS Process, OUT PRKAPC_STATE ApcState)
Definition: procobj.c:704
NTSTATUS NTAPI MiRosUnmapViewOfSection(IN PEPROCESS Process, IN PVOID BaseAddress, IN BOOLEAN SkipDebuggerNotify)
Definition: section.c:3568
NTSTATUS Status
Definition: section.c:4935
#define PsGetCurrentProcess
Definition: psfuncs.h:17
unsigned char BOOLEAN
PMMVAD NTAPI MiLocateAddress(IN PVOID VirtualAddress)
Definition: vadnode.c:48
return FALSE
Definition: section.c:5060
void * PVOID
Definition: retypes.h:9
ULONG_PTR StartingVpn
Definition: mmtypes.h:726
Status
Definition: gdiplustypes.h:24
NTSTATUS NTAPI MiCheckSecuredVad(IN PMMVAD Vad, IN PVOID Base, IN SIZE_T Size, IN ULONG ProtectionMask)
Definition: vadnode.c:815
FORCEINLINE VOID MiLockProcessWorkingSetUnsafe(IN PEPROCESS Process, IN PETHREAD Thread)
Definition: miarm.h:1174
_In_ HANDLE _Outptr_result_bytebuffer_ ViewSize PVOID * BaseAddress
Definition: mmfuncs.h:404
ULONG CurrentProcess
Definition: shell.c:125
_Must_inspect_result_ _In_ ULONG Flags
Definition: wsk.h:170
ULONG_PTR PrivateMemory
Definition: mmtypes.h:695
#define NT_SUCCESS(StatCode)
Definition: apphelp.c:32
#define STATUS_PROCESS_IS_TERMINATING
Definition: ntstatus.h:502
VOID NTAPI DbgkUnMapViewOfSection(IN PVOID BaseAddress)
Definition: dbgkutil.c:436
#define PAGE_SIZE
Definition: env_spec_w32.h:49
VOID NTAPI MiRemoveNode(IN PMMADDRESS_NODE Node, IN PMM_AVL_TABLE Table)
Definition: vadnode.c:360
ULONG_PTR SIZE_T
Definition: typedefs.h:80
__kernel_entry _Inout_ _Inout_ PSIZE_T RegionSize
Definition: mmfuncs.h:172
VOID NTAPI KeUnstackDetachProcess(IN PRKAPC_STATE ApcState)
Definition: procobj.c:756
_Out_ PKAPC_STATE ApcState
Definition: mm.h:1727
#define NULL
Definition: types.h:112
union _MMVAD::@2565 u
#define DPRINT1
Definition: precomp.h:8
_Must_inspect_result_ _In_ PLARGE_INTEGER _In_ PLARGE_INTEGER _In_ ULONG _In_ PFILE_OBJECT _In_ PVOID Process
Definition: fsrtlfuncs.h:219
#define STATUS_NOT_MAPPED_VIEW
Definition: ntstatus.h:262
#define STATUS_SUCCESS
Definition: shellext.h:65
VOID NTAPI PsReturnProcessNonPagedPoolQuota(_In_ PEPROCESS Process, _In_ SIZE_T Amount)
Returns the non paged quota pool that the process was taking up.
Definition: quota.c:938
struct _MEMORY_AREA * MemoryArea
Definition: newmm.h:37
FORCEINLINE VOID MmLockAddressSpace(PMMSUPPORT AddressSpace)
Definition: mm.h:1659
ULONG_PTR VadType
Definition: mmtypes.h:691
#define ExFreePool(addr)
Definition: env_spec_w32.h:352
#define PAGED_CODE()

Referenced by MmUnmapViewOfSection(), and NtUnmapViewOfSection().

◆ MmCommitSessionMappedView()

NTSTATUS NTAPI MmCommitSessionMappedView ( IN PVOID  MappedBase,
IN SIZE_T  ViewSize 
)

Definition at line 3166 of file section.c.

3168 {
3169  ULONG_PTR StartAddress, EndingAddress, Base;
3170  ULONG Hash, Count = 0, Size, QuotaCharge;
3171  PMMSESSION Session;
3172  PMMPTE LastProtoPte, PointerPte, ProtoPte;
3173  PCONTROL_AREA ControlArea;
3174  PSEGMENT Segment;
3175  PSUBSECTION Subsection;
3176  MMPTE TempPte;
3177  PAGED_CODE();
3178 
3179  /* Make sure the base isn't past the session view range */
3180  if ((MappedBase < MiSessionViewStart) ||
3182  {
3183  DPRINT1("Base outside of valid range\n");
3185  }
3186 
3187  /* Make sure the size isn't past the session view range */
3190  {
3191  DPRINT1("Size outside of valid range\n");
3193  }
3194 
3195  /* Sanity check */
3196  ASSERT(ViewSize != 0);
3197 
3198  /* Process must be in a session */
3199  if (PsGetCurrentProcess()->ProcessInSession == FALSE)
3200  {
3201  DPRINT1("Process is not in session\n");
3202  return STATUS_NOT_MAPPED_VIEW;
3203  }
3204 
3205  /* Compute the correctly aligned base and end addresses */
3206  StartAddress = (ULONG_PTR)PAGE_ALIGN(MappedBase);
3207  EndingAddress = ((ULONG_PTR)MappedBase + ViewSize - 1) | (PAGE_SIZE - 1);
3208 
3209  /* Sanity check and grab the session */
3211  Session = &MmSessionSpace->Session;
3212 
3213  /* Get the hash entry for this allocation */
3214  Hash = (StartAddress >> 16) % Session->SystemSpaceHashKey;
3215 
3216  /* Lock system space */
3218 
3219  /* Loop twice so we can try rolling over if needed */
3220  while (TRUE)
3221  {
3222  /* Extract the size and base addresses from the entry */
3223  Base = Session->SystemSpaceViewTable[Hash].Entry & ~0xFFFF;
3224  Size = Session->SystemSpaceViewTable[Hash].Entry & 0xFFFF;
3225 
3226  /* Convert the size to bucket chunks */
3228 
3229  /* Bail out if this entry fits in here */
3230  if ((StartAddress >= Base) && (EndingAddress < (Base + Size))) break;
3231 
3232  /* Check if we overflew past the end of the hash table */
3233  if (++Hash >= Session->SystemSpaceHashSize)
3234  {
3235  /* Reset the hash to zero and keep searching from the bottom */
3236  Hash = 0;
3237  if (++Count == 2)
3238  {
3239  /* But if we overflew twice, then this is not a real mapping */
3240  KeBugCheckEx(DRIVER_UNMAPPING_INVALID_VIEW,
3241  Base,
3242  2,
3243  0,
3244  0);
3245  }
3246  }
3247  }
3248 
3249  /* Make sure the view being mapped is not file-based */
3250  ControlArea = Session->SystemSpaceViewTable[Hash].ControlArea;
3251  if (ControlArea->FilePointer != NULL)
3252  {
3253  /* It is, so we have to bail out */
3254  DPRINT1("Only page-filed backed sections can be commited\n");
3256  return STATUS_ALREADY_COMMITTED;
3257  }
3258 
3259  /* Get the subsection. We don't support LARGE_CONTROL_AREA in ARM3 */
3260  ASSERT(ControlArea->u.Flags.GlobalOnlyPerSession == 0);
3261  ASSERT(ControlArea->u.Flags.Rom == 0);
3262  Subsection = (PSUBSECTION)(ControlArea + 1);
3263 
3264  /* Get the start and end PTEs -- make sure the end PTE isn't past the end */
3265  ProtoPte = Subsection->SubsectionBase + ((StartAddress - Base) >> PAGE_SHIFT);
3266  QuotaCharge = MiAddressToPte(EndingAddress) - MiAddressToPte(StartAddress) + 1;
3267  LastProtoPte = ProtoPte + QuotaCharge;
3268  if (LastProtoPte >= Subsection->SubsectionBase + Subsection->PtesInSubsection)
3269  {
3270  DPRINT1("PTE is out of bounds\n");
3273  }
3274 
3275  /* Acquire the commit lock and count all the non-committed PTEs */
3277  PointerPte = ProtoPte;
3278  while (PointerPte < LastProtoPte)
3279  {
3280  if (PointerPte->u.Long) QuotaCharge--;
3281  PointerPte++;
3282  }
3283 
3284  /* Was everything committed already? */
3285  if (!QuotaCharge)
3286  {
3287  /* Nothing to do! */
3290  return STATUS_SUCCESS;
3291  }
3292 
3293  /* Pick the segment and template PTE */
3294  Segment = ControlArea->Segment;
3295  TempPte = Segment->SegmentPteTemplate;
3296  ASSERT(TempPte.u.Long != 0);
3297 
3298  /* Loop all prototype PTEs to be committed */
3299  PointerPte = ProtoPte;
3300  while (PointerPte < LastProtoPte)
3301  {
3302  /* Make sure the PTE is already invalid */
3303  if (PointerPte->u.Long == 0)
3304  {
3305  /* And write the invalid PTE */
3306  MI_WRITE_INVALID_PTE(PointerPte, TempPte);
3307  }
3308 
3309  /* Move to the next PTE */
3310  PointerPte++;
3311  }
3312 
3313  /* Check if we had at least one page charged */
3314  if (QuotaCharge)
3315  {
3316  /* Update the accounting data */
3317  Segment->NumberOfCommittedPages += QuotaCharge;
3319  }
3320 
3321  /* Release all */
3324  return STATUS_SUCCESS;
3325 }
static int Hash(const char *)
Definition: reader.c:2257
#define PAGE_SHIFT
Definition: env_spec_w32.h:45
PFILE_OBJECT FilePointer
Definition: mmtypes.h:530
union _CONTROL_AREA::@2558 u
VOID FASTCALL KeAcquireGuardedMutex(IN PKGUARDED_MUTEX GuardedMutex)
Definition: gmutex.c:42
#define TRUE
Definition: types.h:120
_In_opt_ ULONG Base
Definition: rtlfuncs.h:2413
SIZE_T MmSharedCommit
Definition: freelist.c:31
PMM_SESSION_SPACE MmSessionSpace
Definition: session.c:21
IN PVOID IN PVOID IN USHORT IN USHORT Size
Definition: pci.h:361
uint32_t ULONG_PTR
Definition: typedefs.h:65
#define STATUS_ALREADY_COMMITTED
Definition: ntstatus.h:270
ASSERT(Segment->Locked)
#define MiAddressToPte(x)
Definition: mmx86.c:19
ULONG MmSessionViewSize
Definition: init.c:35
#define PsGetCurrentProcess
Definition: psfuncs.h:17
#define STATUS_INVALID_PARAMETER_2
Definition: ntstatus.h:476
return FALSE
Definition: section.c:5060
PMMVIEW SystemSpaceViewTable
Definition: miarm.h:458
ULONG SystemSpaceHashKey
Definition: miarm.h:461
_Inout_ PVOID Segment
Definition: exfuncs.h:1101
int Count
Definition: noreturn.cpp:7
MMSESSION Session
Definition: miarm.h:502
#define PAGE_ALIGN(Va)
HARDWARE_PTE_ARMV6 TempPte
Definition: winldr.c:76
BOOLEAN NTAPI MmIsAddressValid(IN PVOID VirtualAddress)
Definition: mmsup.c:174
struct _SUBSECTION * PSUBSECTION
#define InterlockedExchangeAddSizeT(a, b)
Definition: interlocked.h:196
VOID FASTCALL KeReleaseGuardedMutexUnsafe(IN OUT PKGUARDED_MUTEX GuardedMutex)
Definition: gmutex.c:75
PKGUARDED_MUTEX SystemSpaceViewLockPointer
Definition: miarm.h:456
PCONTROL_AREA ControlArea
Definition: miarm.h:450
#define STATUS_INVALID_PARAMETER_1
Definition: ntstatus.h:475
ULONG GlobalOnlyPerSession
Definition: mmtypes.h:488
#define PAGE_SIZE
Definition: env_spec_w32.h:49
KGUARDED_MUTEX MmSectionCommitMutex
Definition: section.c:108
ULONG_PTR Long
Definition: mmtypes.h:215
FORCEINLINE VOID MI_WRITE_INVALID_PTE(IN PMMPTE PointerPte, IN MMPTE InvalidPte)
Definition: miarm.h:997
PVOID MiSessionViewStart
Definition: init.c:30
#define MI_SYSTEM_VIEW_BUCKET_SIZE
Definition: miarm.h:266
PSEGMENT Segment
Definition: mmtypes.h:518
#define NULL
Definition: types.h:112
VOID FASTCALL KeReleaseGuardedMutex(IN OUT PKGUARDED_MUTEX GuardedMutex)
Definition: gmutex.c:53
#define DPRINT1
Definition: precomp.h:8
_Must_inspect_result_ _Outptr_result_bytebuffer_ ViewSize PVOID * MappedBase
Definition: mmfuncs.h:492
_In_ HANDLE _Outptr_result_bytebuffer_ ViewSize PVOID _In_ ULONG_PTR _In_ SIZE_T _Inout_opt_ PLARGE_INTEGER _Inout_ PSIZE_T ViewSize
Definition: mmfuncs.h:404
VOID FASTCALL KeAcquireGuardedMutexUnsafe(IN OUT PKGUARDED_MUTEX GuardedMutex)
Definition: gmutex.c:64
MMSECTION_FLAGS Flags
Definition: mmtypes.h:528
unsigned int ULONG
Definition: retypes.h:1
#define STATUS_NOT_MAPPED_VIEW
Definition: ntstatus.h:262
#define ULONG_PTR
Definition: config.h:101
ULONG_PTR Entry
Definition: miarm.h:449
union _MMPTE::@2284 u
#define STATUS_SUCCESS
Definition: shellext.h:65
ULONG SystemSpaceHashSize
Definition: miarm.h:459
PMMPTE SubsectionBase
Definition: mmtypes.h:578
VOID NTAPI KeBugCheckEx(_In_ ULONG BugCheckCode, _In_ ULONG_PTR BugCheckParameter1, _In_ ULONG_PTR BugCheckParameter2, _In_ ULONG_PTR BugCheckParameter3, _In_ ULONG_PTR BugCheckParameter4)
Definition: rtlcompat.c:108
#define PAGED_CODE()
ULONG PtesInSubsection
Definition: mmtypes.h:580

◆ MmCreateArm3Section()

NTSTATUS NTAPI MmCreateArm3Section ( OUT PVOID SectionObject,
IN ACCESS_MASK  DesiredAccess,
IN POBJECT_ATTRIBUTES ObjectAttributes  OPTIONAL,
IN PLARGE_INTEGER  InputMaximumSize,
IN ULONG  SectionPageProtection,
IN ULONG  AllocationAttributes,
IN HANDLE FileHandle  OPTIONAL,
IN PFILE_OBJECT FileObject  OPTIONAL 
)

Definition at line 2486 of file section.c.

2494 {
2495  SECTION Section;
2496  PSECTION NewSection;
2497  PSUBSECTION Subsection;
2498  PSEGMENT NewSegment, Segment;
2499  NTSTATUS Status;
2500  PCONTROL_AREA ControlArea;
2501  ULONG ProtectionMask, ControlAreaSize, Size, NonPagedCharge, PagedCharge;
2503  BOOLEAN FileLock = FALSE, KernelCall = FALSE;
2504  KIRQL OldIrql;
2506  BOOLEAN UserRefIncremented = FALSE;
2507  PVOID PreviousSectionPointer;
2508 
2509  /* Make the same sanity checks that the Nt interface should've validated */
2512  SEC_NO_CHANGE)) == 0);
2516  SEC_NOCACHE | SEC_NO_CHANGE))));
2522 
2523  /* Convert section flag to page flag */
2525 
2526  /* Check to make sure the protection is correct. Nt* does this already */
2527  ProtectionMask = MiMakeProtectionMask(SectionPageProtection);
2528  if (ProtectionMask == MM_INVALID_PROTECTION) return STATUS_INVALID_PAGE_PROTECTION;
2529 
2530  /* Check if this is going to be a data or image backed file section */
2531  if ((FileHandle) || (FileObject))
2532  {
2533  /* These cannot be mapped with large pages */
2535 
2536  /* For now, only support the mechanism through a file handle */
2537  ASSERT(FileObject == NULL);
2538 
2539  /* Reference the file handle to get the object */
2541  MmMakeFileAccess[ProtectionMask],
2543  PreviousMode,
2544  (PVOID*)&File,
2545  NULL);
2546  if (!NT_SUCCESS(Status)) return Status;
2547 
2548  /* Make sure Cc has been doing its job */
2549  if (!File->SectionObjectPointer)
2550  {
2551  /* This is not a valid file system-based file, fail */
2554  }
2555 
2556  /* Image-file backed sections are not yet supported */
2558 
2559  /* Compute the size of the control area, and allocate it */
2560  ControlAreaSize = sizeof(CONTROL_AREA) + sizeof(MSUBSECTION);
2561  ControlArea = ExAllocatePoolWithTag(NonPagedPool, ControlAreaSize, 'aCmM');
2562  if (!ControlArea)
2563  {
2566  }
2567 
2568  /* Zero it out */
2569  RtlZeroMemory(ControlArea, ControlAreaSize);
2570 
2571  /* Did we get a handle, or an object? */
2572  if (FileHandle)
2573  {
2574  /* We got a file handle so we have to lock down the file */
2575 #if 0
2577  if (!NT_SUCCESS(Status))
2578  {
2579  ExFreePool(ControlArea);
2581  return Status;
2582  }
2583 #else
2584  /* ReactOS doesn't support this API yet, so do nothing */
2586 #endif
2587  /* Update the top-level IRP so that drivers know what's happening */
2589  FileLock = TRUE;
2590  }
2591 
2592  /* Lock the PFN database while we play with the section pointers */
2593  OldIrql = MiAcquirePfnLock();
2594 
2595  /* Image-file backed sections are not yet supported */
2597 
2598  /* There should not already be a control area for this file */
2599  ASSERT(File->SectionObjectPointer->DataSectionObject == NULL);
2600  NewSegment = NULL;
2601 
2602  /* Write down that this CA is being created, and set it */
2603  ControlArea->u.Flags.BeingCreated = TRUE;
2605  PreviousSectionPointer = File->SectionObjectPointer;
2606  File->SectionObjectPointer->DataSectionObject = ControlArea;
2607 
2608  /* We can release the PFN lock now */
2609  MiReleasePfnLock(OldIrql);
2610 
2611  /* We don't support previously-mapped file */
2612  ASSERT(NewSegment == NULL);
2613 
2614  /* Image-file backed sections are not yet supported */
2616 
2617  /* So we always create a data file map */
2619  &Segment,
2620  (PSIZE_T)InputMaximumSize,
2623  KernelCall);
2624  if (!NT_SUCCESS(Status))
2625  {
2626  /* Lock the PFN database while we play with the section pointers */
2627  OldIrql = MiAcquirePfnLock();
2628 
2629  /* Reset the waiting-for-deletion event */
2630  ASSERT(ControlArea->WaitingForDeletion == NULL);
2631  ControlArea->WaitingForDeletion = NULL;
2632 
2633  /* Set the file pointer NULL flag */
2634  ASSERT(ControlArea->u.Flags.FilePointerNull == 0);
2635  ControlArea->u.Flags.FilePointerNull = TRUE;
2636 
2637  /* Delete the data section object */
2639  File->SectionObjectPointer->DataSectionObject = NULL;
2640 
2641  /* No longer being created */
2642  ControlArea->u.Flags.BeingCreated = FALSE;
2643 
2644  /* We can release the PFN lock now */
2645  MiReleasePfnLock(OldIrql);
2646 
2647  /* Check if we locked and set the IRP */
2648  if (FileLock)
2649  {
2650  /* Undo */
2652  //FsRtlReleaseFile(File);
2653  }
2654 
2655  /* Free the control area and de-ref the file object */
2656  ExFreePool(ControlArea);
2658 
2659  /* All done */
2660  return Status;
2661  }
2662 
2663  /* On success, we expect this */
2664  ASSERT(PreviousSectionPointer == File->SectionObjectPointer);
2665 
2666  /* Check if a maximum size was specified */
2667  if (!InputMaximumSize->QuadPart)
2668  {
2669  /* Nope, use the segment size */
2670  Section.SizeOfSection.QuadPart = (LONGLONG)Segment->SizeOfSegment;
2671  }
2672  else
2673  {
2674  /* Yep, use the entered size */
2675  Section.SizeOfSection.QuadPart = InputMaximumSize->QuadPart;
2676  }
2677  }
2678  else
2679  {
2680  /* A handle must be supplied with SEC_IMAGE, as this is the no-handle path */
2682 
2683  /* Not yet supported */
2685 
2686  /* So this must be a pagefile-backed section, create the mappings needed */
2687  Status = MiCreatePagingFileMap(&NewSegment,
2688  InputMaximumSize,
2689  ProtectionMask,
2691  if (!NT_SUCCESS(Status)) return Status;
2692 
2693  /* Set the size here, and read the control area */
2694  Section.SizeOfSection.QuadPart = NewSegment->SizeOfSegment;
2695  ControlArea = NewSegment->ControlArea;
2696 
2697  /* MiCreatePagingFileMap increments user references */
2698  UserRefIncremented = TRUE;
2699  }
2700 
2701  /* Did we already have a segment? */
2702  if (!NewSegment)
2703  {
2704  /* This must be the file path and we created a segment */
2705  NewSegment = Segment;
2706  ASSERT(File != NULL);
2707 
2708  /* Acquire the PFN lock while we set control area flags */
2709  OldIrql = MiAcquirePfnLock();
2710 
2711  /* We don't support this race condition yet, so assume no waiters */
2712  ASSERT(ControlArea->WaitingForDeletion == NULL);
2713  ControlArea->WaitingForDeletion = NULL;
2714 
2715  /* Image-file backed sections are not yet supported, nor ROM images */
2717  ASSERT(Segment->ControlArea->u.Flags.Rom == 0);
2718 
2719  /* Take off the being created flag, and then release the lock */
2720  ControlArea->u.Flags.BeingCreated = FALSE;
2721  MiReleasePfnLock(OldIrql);
2722  }
2723 
2724  /* Check if we locked the file earlier */
2725  if (FileLock)
2726  {
2727  /* Reset the top-level IRP and release the lock */
2729  //FsRtlReleaseFile(File);
2730  FileLock = FALSE;
2731  }
2732 
2733  /* Set the initial section object data */
2734  Section.InitialPageProtection = SectionPageProtection;
2735 
2736  /* The mapping created a control area and segment, save the flags */
2737  Section.Segment = NewSegment;
2738  Section.u.LongFlags = ControlArea->u.LongFlags;
2739 
2740  /* Check if this is a user-mode read-write non-image file mapping */
2741  if (!(FileObject) &&
2743  !(ControlArea->u.Flags.Image) &&
2744  (ControlArea->FilePointer))
2745  {
2746  /* Add a reference and set the flag */
2747  Section.u.Flags.UserWritable = TRUE;
2748  InterlockedIncrement((volatile LONG*)&ControlArea->WritableUserReferences);
2749  }
2750 
2751  /* Check for image mappings or page file mappings */
2752  if ((ControlArea->u.Flags.Image) || !(ControlArea->FilePointer))
2753  {
2754  /* Charge the segment size, and allocate a subsection */
2755  PagedCharge = sizeof(SECTION) + NewSegment->TotalNumberOfPtes * sizeof(MMPTE);
2756  Size = sizeof(SUBSECTION);
2757  }
2758  else
2759  {
2760  /* Charge nothing, and allocate a mapped subsection */
2761  PagedCharge = 0;
2762  Size = sizeof(MSUBSECTION);
2763  }
2764 
2765  /* Check if this is a normal CA */
2766  ASSERT(ControlArea->u.Flags.GlobalOnlyPerSession == 0);
2767  ASSERT(ControlArea->u.Flags.Rom == 0);
2768 
2769  /* Charge only a CA, and the subsection is right after */
2770  NonPagedCharge = sizeof(CONTROL_AREA);
2771  Subsection = (PSUBSECTION)(ControlArea + 1);
2772 
2773  /* We only support single-subsection mappings */
2774  NonPagedCharge += Size;
2775  ASSERT(Subsection->NextSubsection == NULL);
2776 
2777  /* Create the actual section object, with enough space for the prototype PTEs */
2781  PreviousMode,
2782  NULL,
2783  sizeof(SECTION),
2784  PagedCharge,
2785  NonPagedCharge,
2786  (PVOID*)&NewSection);
2787  if (!NT_SUCCESS(Status))
2788  {
2789  /* Check if this is a user-mode read-write non-image file mapping */
2790  if (!(FileObject) &&
2792  !(ControlArea->u.Flags.Image) &&
2793  (ControlArea->FilePointer))
2794  {
2795  /* Remove a reference and check the flag */
2796  ASSERT(Section.u.Flags.UserWritable == 1);
2797  InterlockedDecrement((volatile LONG*)&ControlArea->WritableUserReferences);
2798  }
2799 
2800  /* Check if a user reference was added */
2801  if (UserRefIncremented)
2802  {
2803  /* Acquire the PFN lock while we change counters */
2804  OldIrql = MiAcquirePfnLock();
2805 
2806  /* Decrement the accounting counters */
2807  ControlArea->NumberOfSectionReferences--;
2808  ASSERT((LONG)ControlArea->NumberOfUserReferences > 0);
2809  ControlArea->NumberOfUserReferences--;
2810 
2811  /* Check if we should destroy the CA and release the lock */
2812  MiCheckControlArea(ControlArea, OldIrql);
2813  }
2814 
2815  /* Return the failure code */
2816  return Status;
2817  }
2818 
2819  /* NOTE: Past this point, all failures will be handled by Ob upon ref->0 */
2820 
2821  /* Now copy the local section object from the stack into this new object */
2822  RtlCopyMemory(NewSection, &Section, sizeof(SECTION));
2823  NewSection->Address.StartingVpn = 0;
2824 
2825  /* For now, only user calls are supported */
2826  ASSERT(KernelCall == FALSE);
2827  NewSection->u.Flags.UserReference = TRUE;
2828 
2829  /* Is this a "based" allocation, in which all mappings are identical? */
2831  {
2832  /* Lock the VAD tree during the search */
2834 
2835  /* Is it a brand new ControArea ? */
2836  if (ControlArea->u.Flags.BeingCreated == 1)
2837  {
2838  ASSERT(ControlArea->u.Flags.Based == 1);
2839  /* Then we must find a global address, top-down */
2842  _64K,
2844  (ULONG_PTR*)&ControlArea->Segment->BasedAddress);
2845 
2846  if (!NT_SUCCESS(Status))
2847  {
2848  /* No way to find a valid range. */
2850  ControlArea->u.Flags.Based = 0;
2851  NewSection->u.Flags.Based = 0;
2852  ObDereferenceObject(NewSection);
2853  return Status;
2854  }
2855 
2856  /* Compute the ending address and insert it into the VAD tree */
2857  NewSection->Address.StartingVpn = (ULONG_PTR)ControlArea->Segment->BasedAddress;
2858  NewSection->Address.EndingVpn = NewSection->Address.StartingVpn + NewSection->SizeOfSection.LowPart - 1;
2859  MiInsertBasedSection(NewSection);
2860  }
2861  else
2862  {
2863  /* FIXME : Should we deny section creation if SEC_BASED is not set ? Can we have two different section objects on the same based address ? Investigate !*/
2864  ASSERT(FALSE);
2865  }
2866 
2868  }
2869 
2870  /* The control area is not being created anymore */
2871  if (ControlArea->u.Flags.BeingCreated == 1)
2872  {
2873  /* Acquire the PFN lock while we set control area flags */
2874  OldIrql = MiAcquirePfnLock();
2875 
2876  /* Take off the being created flag, and then release the lock */
2877  ControlArea->u.Flags.BeingCreated = 0;
2878  NewSection->u.Flags.BeingCreated = 0;
2879 
2880  MiReleasePfnLock(OldIrql);
2881  }
2882 
2883  /* Migrate the attribute into a flag */
2884  if (AllocationAttributes & SEC_NO_CHANGE) NewSection->u.Flags.NoChange = TRUE;
2885 
2886  /* If R/W access is not requested, this might eventually become a CoW mapping */
2888  {
2889  NewSection->u.Flags.CopyOnWrite = TRUE;
2890  }
2891 
2892  /* Write down if this was a kernel call */
2893  ControlArea->u.Flags.WasPurged |= KernelCall;
2894  ASSERT(ControlArea->u.Flags.WasPurged == FALSE);
2895 
2896  /* Make sure the segment and the section are the same size, or the section is smaller */
2897  ASSERT((ULONG64)NewSection->SizeOfSection.QuadPart <= NewSection->Segment->SizeOfSegment);
2898 
2899  /* Return the object and the creation status */
2900  *SectionObject = (PVOID)NewSection;
2901  return Status;
2902 }
ULONG NoChange
Definition: mmtypes.h:483
_Must_inspect_result_ _Outptr_ PVOID * SectionObject
Definition: fsrtlfuncs.h:860
#define PAGE_NOCACHE
Definition: nt_native.h:1311
IN PUNICODE_STRING IN POBJECT_ATTRIBUTES ObjectAttributes
Definition: conport.c:35
#define MM_INVALID_PROTECTION
Definition: miarm.h:67
PEVENT_COUNTER WaitingForDeletion
Definition: mmtypes.h:531
PFILE_OBJECT FilePointer
Definition: mmtypes.h:530
#define STATUS_INSUFFICIENT_RESOURCES
Definition: udferr_usr.h:158
#define SEC_LARGE_PAGES
Definition: mmtypes.h:102
ULONGLONG SizeOfSegment
Definition: mmtypes.h:410
_In_ ACCESS_MASK _In_opt_ POBJECT_ATTRIBUTES _In_opt_ PLARGE_INTEGER _In_ ULONG _In_ ULONG AllocationAttributes
Definition: mmfuncs.h:360