#include <ntoskrnl.h>
#include <debug.h>
#include <mm/ARM3/miarm.h>

Include dependency graph for section.c:

Macros
#define	NDEBUG

#define	MODULE_INVOLVED_IN_ARM3

Functions
static BOOLEAN	MiIsProtectionCompatible (IN ULONG SectionPageProtection, IN ULONG NewSectionPageProtection)

ULONG NTAPI	MiMakeProtectionMask (IN ULONG Protect)

BOOLEAN NTAPI	MiInitializeSystemSpaceMap (IN PMMSESSION InputSession OPTIONAL)

static PVOID	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)

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

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

static VOID	MiSegmentDelete (IN PSEGMENT Segment)

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

static VOID	MiDereferenceControlArea (IN PCONTROL_AREA ControlArea)

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

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

static NTSTATUS	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)

static NTSTATUS	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)

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

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

PFILE_OBJECT NTAPI	MmGetFileObjectForSection (IN PVOID SectionObject)

static PFILE_OBJECT	MiGetFileObjectForVad (_In_ PMMVAD Vad)

VOID NTAPI	MmGetImageInformation (OUT PSECTION_IMAGE_INFORMATION ImageInformation)

static NTSTATUS	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)

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

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

static NTSTATUS	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)

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 399 of file section.c.

{
    MMPTE TempPte;
    PMMPTE PointerPte, ProtoPte, LastProtoPte, LastPte;
    PSUBSECTION Subsection;
 
    /* Mapping at offset not supported yet */
    ASSERT(SectionOffset == 0);
 
    /* ARM3 doesn't support this yet */
    ASSERT(ControlArea->u.Flags.GlobalOnlyPerSession == 0);
    ASSERT(ControlArea->u.Flags.Rom == 0);
    ASSERT(ControlArea->FilePointer == NULL);
 
    /* Sanity checks */
    ASSERT(PteCount != 0);
    ASSERT(ControlArea->NumberOfMappedViews >= 1);
    ASSERT(ControlArea->NumberOfUserReferences >= 1);
    ASSERT(ControlArea->NumberOfSectionReferences != 0);
    ASSERT(ControlArea->u.Flags.BeingCreated == 0);
    ASSERT(ControlArea->u.Flags.BeingDeleted == 0);
    ASSERT(ControlArea->u.Flags.BeingPurged == 0);
 
    /* Get the PTEs for the actual mapping */
    PointerPte = FirstPte;
    LastPte = FirstPte + PteCount;
 
    /* Get the prototype PTEs that desribe the section mapping in the subsection */
    Subsection = (PSUBSECTION)(ControlArea + 1);
    ProtoPte = Subsection->SubsectionBase;
    LastProtoPte = &Subsection->SubsectionBase[Subsection->PtesInSubsection];
 
    /* Loop the PTEs for the mapping */
    while (PointerPte < LastPte)
    {
        /* We may have run out of prototype PTEs in this subsection */
        if (ProtoPte >= LastProtoPte)
        {
            /* But we don't handle this yet */
            ASSERT(FALSE);
        }
 
        /* The PTE should be completely clear */
        ASSERT(PointerPte->u.Long == 0);
 
        /* Build the prototype PTE and write it */
        MI_MAKE_PROTOTYPE_PTE(&TempPte, ProtoPte);
        MI_WRITE_INVALID_PTE(PointerPte, TempPte);
 
        /* Keep going */
        PointerPte++;
        ProtoPte++;
    }
 
    /* No failure path */
    return STATUS_SUCCESS;
}

Referenced by MiMapViewInSystemSpace().

◆ MiCheckControlArea()

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

static

Definition at line 714 of file section.c.

{
    BOOLEAN DeleteSegment = FALSE;
    MI_ASSERT_PFN_LOCK_HELD();
 
    /* Check if this is the last reference or view */
    if (!(ControlArea->NumberOfMappedViews) &&
        !(ControlArea->NumberOfSectionReferences))
    {
        /* There should be no more user references either */
        ASSERT(ControlArea->NumberOfUserReferences == 0);
 
        /* Not yet supported */
        ASSERT(ControlArea->FilePointer == NULL);
 
        /* The control area is being destroyed */
        ControlArea->u.Flags.BeingDeleted = TRUE;
        DeleteSegment = TRUE;
    }
 
    /* Release the PFN lock */
    MiReleasePfnLock(OldIrql);
 
    /* Delete the segment if needed */
    if (DeleteSegment)
    {
        /* No more user write references at all */
        ASSERT(ControlArea->WritableUserReferences == 0);
        MiSegmentDelete(ControlArea->Segment);
    }
}

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

◆ MiCheckPurgeAndUpMapCount()

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

static

Definition at line 530 of file section.c.

{
    KIRQL OldIrql;
 
    /* Flag not yet supported */
    ASSERT(FailIfSystemViews == FALSE);
 
    /* Lock the PFN database */
    OldIrql = MiAcquirePfnLock();
 
    /* State not yet supported */
    ASSERT(ControlArea->u.Flags.BeingPurged == 0);
 
    /* Increase the reference counts */
    ControlArea->NumberOfMappedViews++;
    ControlArea->NumberOfUserReferences++;
    ASSERT(ControlArea->NumberOfSectionReferences != 0);
 
    /* Release the PFN lock and return success */
    MiReleasePfnLock(OldIrql);
    return STATUS_SUCCESS;
}

Referenced by MiMapViewInSystemSpace(), and MiMapViewOfDataSection().

◆ MiCreateDataFileMap()

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

static

Definition at line 1406 of file section.c.

{
    /* Not yet implemented */
    ASSERT(FALSE);
    *Segment = NULL;
    return STATUS_NOT_IMPLEMENTED;
}

Referenced by MmCreateArm3Section().

◆ MiCreatePagingFileMap()

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

static

Definition at line 1421 of file section.c.

{
    ULONGLONG SizeLimit;
    PFN_COUNT PteCount;
    PMMPTE PointerPte;
    MMPTE TempPte;
    PCONTROL_AREA ControlArea;
    PSEGMENT NewSegment;
    PSUBSECTION Subsection;
    PAGED_CODE();
 
    /* No large pages in ARM3 yet */
    ASSERT((AllocationAttributes & SEC_LARGE_PAGES) == 0);
 
    /* Pagefile-backed sections need a known size */
    if (!MaximumSize || !MaximumSize->QuadPart || MaximumSize->QuadPart < 0)
        return STATUS_INVALID_PARAMETER_4;
 
    /* Calculate the maximum size possible, given the Prototype PTEs we'll need */
    SizeLimit = MmSizeOfPagedPoolInBytes - sizeof(SEGMENT);
    SizeLimit /= sizeof(MMPTE);
    SizeLimit <<= PAGE_SHIFT;
 
    /* Fail if this size is too big */
    if (MaximumSize->QuadPart > SizeLimit)
    {
        return STATUS_SECTION_TOO_BIG;
    }
 
    /* Calculate how many Prototype PTEs will be needed */
    PteCount = (PFN_COUNT)((MaximumSize->QuadPart + PAGE_SIZE - 1) >> PAGE_SHIFT);
 
    /* For commited memory, we must have a valid protection mask */
    if (AllocationAttributes & SEC_COMMIT) ASSERT(ProtectionMask != 0);
 
    /* The segment contains all the Prototype PTEs, allocate it in paged pool */
    NewSegment = ExAllocatePoolWithTag(PagedPool,
                                       sizeof(SEGMENT) +
                                       sizeof(MMPTE) * (PteCount - 1),
                                       'tSmM');
    if (!NewSegment)
    {
        return STATUS_INSUFFICIENT_RESOURCES;
    }
    *Segment = NewSegment;
 
    /* Now allocate the control area, which has the subsection structure */
    ControlArea = ExAllocatePoolWithTag(NonPagedPool,
                                        sizeof(CONTROL_AREA) + sizeof(SUBSECTION),
                                        'tCmM');
    if (!ControlArea)
    {
        ExFreePoolWithTag(Segment, 'tSmM');
        return STATUS_INSUFFICIENT_RESOURCES;
    }
 
    /* And zero it out, filling the basic segmnet pointer and reference fields */
    RtlZeroMemory(ControlArea, sizeof(CONTROL_AREA) + sizeof(SUBSECTION));
    ControlArea->Segment = NewSegment;
    ControlArea->NumberOfSectionReferences = 1;
    ControlArea->NumberOfUserReferences = 1;
 
    /* Convert allocation attributes to control area flags */
    if (AllocationAttributes & SEC_BASED) ControlArea->u.Flags.Based = 1;
    if (AllocationAttributes & SEC_RESERVE) ControlArea->u.Flags.Reserve = 1;
    if (AllocationAttributes & SEC_COMMIT) ControlArea->u.Flags.Commit = 1;
 
    /* We just allocated it */
    ControlArea->u.Flags.BeingCreated = 1;
 
    /* The subsection follows, write the mask, PTE count and point back to the CA */
    Subsection = (PSUBSECTION)(ControlArea + 1);
    Subsection->ControlArea = ControlArea;
    Subsection->PtesInSubsection = PteCount;
    Subsection->u.SubsectionFlags.Protection = ProtectionMask;
 
    /* Zero out the segment's prototype PTEs, and link it with the control area */
    PointerPte = &NewSegment->ThePtes[0];
    RtlZeroMemory(NewSegment, sizeof(SEGMENT));
    NewSegment->PrototypePte = PointerPte;
    NewSegment->ControlArea = ControlArea;
 
    /* Save some extra accounting data for the segment as well */
    NewSegment->u1.CreatingProcess = PsGetCurrentProcess();
    NewSegment->SizeOfSegment = ((ULONGLONG)PteCount) * PAGE_SIZE;
    NewSegment->TotalNumberOfPtes = PteCount;
    NewSegment->NonExtendedPtes = PteCount;
 
    /* The subsection's base address is the first Prototype PTE in the segment */
    Subsection->SubsectionBase = PointerPte;
 
    /* Start with an empty PTE, unless this is a commit operation */
    TempPte.u.Long = 0;
    if (AllocationAttributes & SEC_COMMIT)
    {
        /* In which case, write down the protection mask in the Prototype PTEs */
        TempPte.u.Soft.Protection = ProtectionMask;
 
        /* For accounting, also mark these pages as being committed */
        NewSegment->NumberOfCommittedPages = PteCount;
    }
 
    /* The template PTE itself for the segment should also have the mask set */
    NewSegment->SegmentPteTemplate.u.Soft.Protection = ProtectionMask;
 
    /* Write out the prototype PTEs, for now they're simply demand zero */
#ifdef _WIN64
    RtlFillMemoryUlonglong(PointerPte, PteCount * sizeof(MMPTE), TempPte.u.Long);
#else
    RtlFillMemoryUlong(PointerPte, PteCount * sizeof(MMPTE), TempPte.u.Long);
#endif
    return STATUS_SUCCESS;
}

Referenced by MmCreateArm3Section().

◆ MiDeleteARM3Section()

VOID NTAPI MiDeleteARM3Section ( PVOID ObjectBody )

Definition at line 2951 of file section.c.

{
    PSECTION SectionObject;
    PCONTROL_AREA ControlArea;
    KIRQL OldIrql;
 
    SectionObject = (PSECTION)ObjectBody;
 
    if (SectionObject->u.Flags.Based == 1)
    {
        /* Remove the node from the global section address tree */
        KeAcquireGuardedMutex(&MmSectionBasedMutex);
        MiRemoveNode(&SectionObject->Address, &MmSectionBasedRoot);
        KeReleaseGuardedMutex(&MmSectionBasedMutex);
    }
 
    /* Lock the PFN database */
    OldIrql = MiAcquirePfnLock();
 
    ASSERT(SectionObject->Segment);
    ASSERT(SectionObject->Segment->ControlArea);
 
    ControlArea = SectionObject->Segment->ControlArea;
 
    /* Dereference */
    ControlArea->NumberOfSectionReferences--;
    ControlArea->NumberOfUserReferences--;
 
    ASSERT(ControlArea->u.Flags.BeingDeleted == 0);
 
    /* Check it. It will delete it if there is no more reference to it */
    MiCheckControlArea(ControlArea, OldIrql);
}

Referenced by MmpDeleteSection().

◆ MiDereferenceControlArea()

static VOID MiDereferenceControlArea ( IN PCONTROL_AREA ControlArea )

static

Definition at line 749 of file section.c.

{
    KIRQL OldIrql;
 
    /* Lock the PFN database */
    OldIrql = MiAcquirePfnLock();
 
    /* Drop reference counts */
    ControlArea->NumberOfMappedViews--;
    ControlArea->NumberOfUserReferences--;
 
    /* Check if it's time to delete the CA. This releases the lock */
    MiCheckControlArea(ControlArea, OldIrql);
}

Referenced by MiMapViewInSystemSpace(), and MiMapViewOfDataSection().

◆ MiFillSystemPageDirectory()

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

Definition at line 462 of file section.c.

{
    PMMPDE PointerPde, LastPde, SystemMapPde;
    MMPDE TempPde;
    PFN_NUMBER PageFrameIndex, ParentPage;
    KIRQL OldIrql;
    PAGED_CODE();
 
    /* Find the PDEs needed for this mapping */
    PointerPde = MiAddressToPde(Base);
    LastPde = MiAddressToPde((PVOID)((ULONG_PTR)Base + NumberOfBytes - 1));
 
#if (_MI_PAGING_LEVELS == 2)
    /* Find the system double-mapped PDE that describes this mapping */
    SystemMapPde = &MmSystemPagePtes[((ULONG_PTR)PointerPde & (SYSTEM_PD_SIZE - 1)) / sizeof(MMPTE)];
#else
    /* We don't have a double mapping */
    SystemMapPde = PointerPde;
#endif
 
    /* Use the PDE template and loop the PDEs */
    TempPde = ValidKernelPde;
    while (PointerPde <= LastPde)
    {
        /* Lock the PFN database */
        OldIrql = MiAcquirePfnLock();
 
        /* Check if we don't already have this PDE mapped */
        if (SystemMapPde->u.Hard.Valid == 0)
        {
            /* Grab a page for it */
            MI_SET_USAGE(MI_USAGE_PAGE_TABLE);
            MI_SET_PROCESS2(PsGetCurrentProcess()->ImageFileName);
            PageFrameIndex = MiRemoveZeroPage(MI_GET_NEXT_COLOR());
            ASSERT(PageFrameIndex);
            TempPde.u.Hard.PageFrameNumber = PageFrameIndex;
 
#if (_MI_PAGING_LEVELS == 2)
            ParentPage = MmSystemPageDirectory[(PointerPde - MiAddressToPde(NULL)) / PDE_PER_PAGE];
#else
            ParentPage = MiPdeToPpe(PointerPde)->u.Hard.PageFrameNumber;
#endif
            /* Initialize its PFN entry, with the parent system page directory page table */
            MiInitializePfnForOtherProcess(PageFrameIndex,
                                           (PMMPTE)PointerPde,
                                           ParentPage);
 
            /* Make the system PDE entry valid */
            MI_WRITE_VALID_PDE(SystemMapPde, TempPde);
 
            /* The system PDE entry might be the PDE itself, so check for this */
            if (PointerPde->u.Hard.Valid == 0)
            {
                /* It's different, so make the real PDE valid too */
                MI_WRITE_VALID_PDE(PointerPde, TempPde);
            }
        }
 
        /* Release the lock and keep going with the next PDE */
        MiReleasePfnLock(OldIrql);
        SystemMapPde++;
        PointerPde++;
    }
}

Referenced by MiMapViewInSystemSpace(), and MmCreateVirtualMappingUnsafeEx().

◆ MiFlushTbAndCapture()

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

Definition at line 1821 of file section.c.

{
    MMPTE TempPte, PreviousPte;
    KIRQL OldIrql;
    BOOLEAN RebuildPte = FALSE;
 
    //
    // User for sanity checking later on
    //
    PreviousPte = *PointerPte;
 
    //
    // Build the PTE and acquire the PFN lock
    //
    MI_MAKE_HARDWARE_PTE_USER(&TempPte,
                              PointerPte,
                              ProtectionMask,
                              PreviousPte.u.Hard.PageFrameNumber);
    OldIrql = MiAcquirePfnLock();
 
    //
    // We don't support I/O mappings in this path yet
    //
    ASSERT(Pfn1 != NULL);
    ASSERT(Pfn1->u3.e1.CacheAttribute != MiWriteCombined);
 
    //
    // Make sure new protection mask doesn't get in conflict and fix it if it does
    //
    if (Pfn1->u3.e1.CacheAttribute == MiCached)
    {
        //
        // This is a cached PFN
        //
        if (ProtectionMask & (MM_NOCACHE | MM_NOACCESS))
        {
            RebuildPte = TRUE;
            ProtectionMask &= ~(MM_NOCACHE | MM_NOACCESS);
        }
    }
    else if (Pfn1->u3.e1.CacheAttribute == MiNonCached)
    {
        //
        // This is a non-cached PFN
        //
        if ((ProtectionMask & (MM_NOCACHE | MM_NOACCESS)) != MM_NOCACHE)
        {
            RebuildPte = TRUE;
            ProtectionMask &= ~MM_NOACCESS;
            ProtectionMask |= MM_NOCACHE;
        }
    }
 
    if (RebuildPte)
    {
        MI_MAKE_HARDWARE_PTE_USER(&TempPte,
                                  PointerPte,
                                  ProtectionMask,
                                  PreviousPte.u.Hard.PageFrameNumber);
    }
 
    //
    // Write the new PTE, making sure we are only changing the bits
    //
    MI_UPDATE_VALID_PTE(PointerPte, TempPte);
 
    //
    // Flush the TLB
    //
    ASSERT(PreviousPte.u.Hard.Valid == 1);
    KeFlushCurrentTb();
    ASSERT(PreviousPte.u.Hard.Valid == 1);
 
    //
    // Windows updates the relevant PFN1 information, we currently don't.
    //
    if (UpdateDirty && PreviousPte.u.Hard.Dirty)
    {
        if (!Pfn1->u3.e1.Modified)
        {
            DPRINT1("FIXME: Mark PFN as dirty\n");
        }
    }
 
    //
    // Not supported in ARM3
    //
    ASSERT(FoundVad->u.VadFlags.VadType != VadWriteWatch);
 
    //
    // Release the PFN lock, we are done
    //
    MiReleasePfnLock(OldIrql);
}

Referenced by MiProtectVirtualMemory().

◆ MiGetFileObjectForVad()

static PFILE_OBJECT MiGetFileObjectForVad ( _In_ PMMVAD Vad )

static

Definition at line 1559 of file section.c.

{
    PCONTROL_AREA ControlArea;
    PFILE_OBJECT FileObject;
 
    /* Check if this is a RosMm memory area */
    if (MI_IS_MEMORY_AREA_VAD(Vad))
    {
        PMEMORY_AREA MemoryArea = (PMEMORY_AREA)Vad;
 
        /* We do not expect ARM3 memory areas here, those are kernel only */
        ASSERT(MI_IS_ROSMM_VAD(Vad));
 
        /* Check if it's a section view (RosMm section) */
        if (MemoryArea->Type == MEMORY_AREA_SECTION_VIEW)
        {
            /* Get the section pointer to the SECTION_OBJECT */
            FileObject = MemoryArea->SectionData.Segment->FileObject;
        }
        else
        {
#ifdef NEWCC
            ASSERT(MemoryArea->Type == MEMORY_AREA_CACHE);
            DPRINT1("VAD is a cache section!\n");
#else
            ASSERT(FALSE);
#endif
            return NULL;
        }
    }
    else
    {
        /* Make sure it's not a VM VAD */
        if (Vad->u.VadFlags.PrivateMemory == 1)
        {
            DPRINT1("VAD is not a section\n");
            return NULL;
        }
 
        /* Get the control area */
        ControlArea = Vad->ControlArea;
        if ((ControlArea == NULL) || !ControlArea->u.Flags.Image)
        {
            DPRINT1("Address is not a section\n");
            return NULL;
        }
 
        /* Get the file object */
        FileObject = ControlArea->FilePointer;
    }
 
    /* Return the file object */
    return FileObject;
}

Referenced by MmGetFileNameForAddress(), and NtAreMappedFilesTheSame().

◆ MiInitializeSystemSpaceMap()

BOOLEAN NTAPI MiInitializeSystemSpaceMap ( IN PMMSESSION InputSession OPTIONAL )

Definition at line 222 of file section.c.

{
    SIZE_T AllocSize, BitmapSize, Size;
    PVOID ViewStart;
    PMMSESSION Session;
 
    /* Check if this a session or system space */
    if (InputSession)
    {
        /* Use the input session */
        Session = InputSession;
        ViewStart = MiSessionViewStart;
        Size = MmSessionViewSize;
    }
    else
    {
        /* Use the system space "session" */
        Session = &MmSession;
        ViewStart = MiSystemViewStart;
        Size = MmSystemViewSize;
    }
 
    /* Initialize the system space lock */
    Session->SystemSpaceViewLockPointer = &Session->SystemSpaceViewLock;
    KeInitializeGuardedMutex(Session->SystemSpaceViewLockPointer);
 
    /* Set the start address */
    Session->SystemSpaceViewStart = ViewStart;
 
    /* Create a bitmap to describe system space */
    BitmapSize = sizeof(RTL_BITMAP) + ((((Size / MI_SYSTEM_VIEW_BUCKET_SIZE) + 31) / 32) * sizeof(ULONG));
    Session->SystemSpaceBitMap = ExAllocatePoolWithTag(NonPagedPool,
                                                       BitmapSize,
                                                       TAG_MM);
    ASSERT(Session->SystemSpaceBitMap);
    RtlInitializeBitMap(Session->SystemSpaceBitMap,
                        (PULONG)(Session->SystemSpaceBitMap + 1),
                        (ULONG)(Size / MI_SYSTEM_VIEW_BUCKET_SIZE));
 
    /* Set system space fully empty to begin with */
    RtlClearAllBits(Session->SystemSpaceBitMap);
 
    /* Set default hash flags */
    Session->SystemSpaceHashSize = 31;
    Session->SystemSpaceHashKey = Session->SystemSpaceHashSize - 1;
    Session->SystemSpaceHashEntries = 0;
 
    /* Calculate how much space for the hash views we'll need */
    AllocSize = sizeof(MMVIEW) * Session->SystemSpaceHashSize;
    ASSERT(AllocSize < PAGE_SIZE);
 
    /* Allocate and zero the view table */
    Session->SystemSpaceViewTable = ExAllocatePoolWithTag(Session == &MmSession ?
                                                          NonPagedPool :
                                                          PagedPool,
                                                          AllocSize,
                                                          TAG_MM);
    ASSERT(Session->SystemSpaceViewTable != NULL);
    RtlZeroMemory(Session->SystemSpaceViewTable, AllocSize);
 
    /* Success */
    return TRUE;
}

Referenced by MiBuildPagedPool(), and MiSessionCreateInternal().

◆ MiInsertInSystemSpace()

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

static

Definition at line 288 of file section.c.

{
    PVOID Base;
    ULONG Entry, Hash, i, HashSize;
    PMMVIEW OldTable;
    PAGED_CODE();
 
    /* Stay within 4GB */
    ASSERT(Buckets < MI_SYSTEM_VIEW_BUCKET_SIZE);
 
    /* Lock system space */
    KeAcquireGuardedMutex(Session->SystemSpaceViewLockPointer);
 
    /* Check if we're going to exhaust hash entries */
    if ((Session->SystemSpaceHashEntries + 8) > Session->SystemSpaceHashSize)
    {
        /* Double the hash size */
        HashSize = Session->SystemSpaceHashSize * 2;
 
        /* Save the old table and allocate a new one */
        OldTable = Session->SystemSpaceViewTable;
        Session->SystemSpaceViewTable = ExAllocatePoolWithTag(Session ==
                                                              &MmSession ?
                                                              NonPagedPool :
                                                              PagedPool,
                                                              HashSize *
                                                              sizeof(MMVIEW),
                                                              TAG_MM);
        if (!Session->SystemSpaceViewTable)
        {
            /* Failed to allocate a new table, keep the old one for now */
            Session->SystemSpaceViewTable = OldTable;
        }
        else
        {
            /* Clear the new table and set the new ahsh and key */
            RtlZeroMemory(Session->SystemSpaceViewTable, HashSize * sizeof(MMVIEW));
            Session->SystemSpaceHashSize = HashSize;
            Session->SystemSpaceHashKey = Session->SystemSpaceHashSize - 1;
 
            /* Loop the old table */
            for (i = 0; i < Session->SystemSpaceHashSize / 2; i++)
            {
                /* Check if the entry was valid */
                if (OldTable[i].Entry)
                {
                    /* Re-hash the old entry and search for space in the new table */
                    Hash = (OldTable[i].Entry >> 16) % Session->SystemSpaceHashKey;
                    while (Session->SystemSpaceViewTable[Hash].Entry)
                    {
                        /* Loop back at the beginning if we had an overflow */
                        if (++Hash >= Session->SystemSpaceHashSize) Hash = 0;
                    }
 
                    /* Write the old entry in the new table */
                    Session->SystemSpaceViewTable[Hash] = OldTable[i];
                }
            }
 
            /* Free the old table */
            ExFreePool(OldTable);
        }
    }
 
    /* Check if we ran out */
    if (Session->SystemSpaceHashEntries == Session->SystemSpaceHashSize)
    {
        DPRINT1("Ran out of system view hash entries\n");
        KeReleaseGuardedMutex(Session->SystemSpaceViewLockPointer);
        return NULL;
    }
 
    /* Find space where to map this view */
    i = RtlFindClearBitsAndSet(Session->SystemSpaceBitMap, Buckets, 0);
    if (i == 0xFFFFFFFF)
    {
        /* Out of space, fail */
        Session->BitmapFailures++;
        DPRINT1("Out of system view space\n");
        KeReleaseGuardedMutex(Session->SystemSpaceViewLockPointer);
        return NULL;
    }
 
    /* Compute the base address */
    Base = (PVOID)((ULONG_PTR)Session->SystemSpaceViewStart + (i * MI_SYSTEM_VIEW_BUCKET_SIZE));
 
    /* Get the hash entry for this allocation */
    Entry = ((ULONG_PTR)Base & ~(MI_SYSTEM_VIEW_BUCKET_SIZE - 1)) + Buckets;
    Hash = (Entry >> 16) % Session->SystemSpaceHashKey;
 
    /* Loop hash entries until a free one is found */
    while (Session->SystemSpaceViewTable[Hash].Entry)
    {
        /* Unless we overflow, in which case loop back at hash o */
        if (++Hash >= Session->SystemSpaceHashSize) Hash = 0;
    }
 
    /* Add this entry into the hash table */
    Session->SystemSpaceViewTable[Hash].Entry = Entry;
    Session->SystemSpaceViewTable[Hash].ControlArea = ControlArea;
 
    /* Hash entry found, increment total and return the base address */
    Session->SystemSpaceHashEntries++;
    KeReleaseGuardedMutex(Session->SystemSpaceViewLockPointer);
    return Base;
}

Referenced by MiMapViewInSystemSpace().

◆ MiIsProtectionCompatible()

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

static

Definition at line 117 of file section.c.

{
    ULONG ProtectionMask, CompatibleMask;
 
    /* Calculate the protection mask and make sure it's valid */
    ProtectionMask = MiMakeProtectionMask(SectionPageProtection);
    if (ProtectionMask == MM_INVALID_PROTECTION)
    {
        DPRINT1("Invalid protection mask\n");
        return FALSE;
    }
 
    /* Calculate the compatible mask */
    CompatibleMask = MmCompatibleProtectionMask[ProtectionMask & 0x7] |
                     PAGE_GUARD | PAGE_NOCACHE | PAGE_WRITECOMBINE;
 
    /* See if the mapping protection is compatible with the create protection */
    return ((CompatibleMask | NewSectionPageProtection) == CompatibleMask);
}

Referenced by MmMapViewOfArm3Section().

◆ MiLocateSubsection()

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

Definition at line 556 of file section.c.

{
    PSUBSECTION Subsection;
    PCONTROL_AREA ControlArea;
    ULONG_PTR PteOffset;
 
    /* Get the control area */
    ControlArea = Vad->ControlArea;
    ASSERT(ControlArea->u.Flags.Rom == 0);
    ASSERT(ControlArea->u.Flags.Image == 0);
    ASSERT(ControlArea->u.Flags.GlobalOnlyPerSession == 0);
 
    /* Get the subsection */
    Subsection = (PSUBSECTION)(ControlArea + 1);
 
    /* We only support single-subsection segments */
    ASSERT(Subsection->SubsectionBase != NULL);
    ASSERT(Vad->FirstPrototypePte >= Subsection->SubsectionBase);
    ASSERT(Vad->FirstPrototypePte < &Subsection->SubsectionBase[Subsection->PtesInSubsection]);
 
    /* Compute the PTE offset */
    PteOffset = Vpn - Vad->StartingVpn;
    PteOffset += Vad->FirstPrototypePte - Subsection->SubsectionBase;
 
    /* Again, we only support single-subsection segments */
    ASSERT(PteOffset < 0xF0000000);
    ASSERT(PteOffset < Subsection->PtesInSubsection);
 
    /* Return the subsection */
    return Subsection;
}

Referenced by MiDeleteVirtualAddresses().

◆ MiMakeProtectionMask()

ULONG NTAPI MiMakeProtectionMask ( IN ULONG Protect )

Definition at line 140 of file section.c.

{
    ULONG Mask1, Mask2, ProtectMask;
 
    /* PAGE_EXECUTE_WRITECOMBINE is theoretically the maximum */
    if (Protect >= (PAGE_WRITECOMBINE * 2)) return MM_INVALID_PROTECTION;
 
    /*
     * Windows API protection mask can be understood as two bitfields, differing
     * by whether or not execute rights are being requested
     */
    Mask1 = Protect & 0xF;
    Mask2 = (Protect >> 4) & 0xF;
 
    /* Check which field is there */
    if (!Mask1)
    {
        /* Mask2 must be there, use it to determine the PTE protection */
        if (!Mask2) return MM_INVALID_PROTECTION;
        ProtectMask = MmUserProtectionToMask2[Mask2];
    }
    else
    {
        /* Mask2 should not be there, use Mask1 to determine the PTE mask */
        if (Mask2) return MM_INVALID_PROTECTION;
        ProtectMask = MmUserProtectionToMask1[Mask1];
    }
 
    /* Make sure the final mask is a valid one */
    if (ProtectMask == MM_INVALID_PROTECTION) return MM_INVALID_PROTECTION;
 
    /* Check for PAGE_GUARD option */
    if (Protect & PAGE_GUARD)
    {
        /* It's not valid on no-access, nocache, or writecombine pages */
        if ((ProtectMask == MM_NOACCESS) ||
            (Protect & (PAGE_NOCACHE | PAGE_WRITECOMBINE)))
        {
            /* Fail such requests */
            return MM_INVALID_PROTECTION;
        }
 
        /* This actually turns on guard page in this scenario! */
        ProtectMask |= MM_GUARDPAGE;
    }
 
    /* Check for nocache option */
    if (Protect & PAGE_NOCACHE)
    {
        /* The earlier check should've eliminated this possibility */
        ASSERT((Protect & PAGE_GUARD) == 0);
 
        /* Check for no-access page or write combine page */
        if ((ProtectMask == MM_NOACCESS) || (Protect & PAGE_WRITECOMBINE))
        {
            /* Such a request is invalid */
            return MM_INVALID_PROTECTION;
        }
 
        /* Add the PTE flag */
        ProtectMask |= MM_NOCACHE;
    }
 
    /* Check for write combine option */
    if (Protect & PAGE_WRITECOMBINE)
    {
        /* The two earlier scenarios should've caught this */
        ASSERT((Protect & (PAGE_GUARD | PAGE_NOACCESS)) == 0);
 
        /* Don't allow on no-access pages */
        if (ProtectMask == MM_NOACCESS) return MM_INVALID_PROTECTION;
 
        /* This actually turns on write-combine in this scenario! */
        ProtectMask |= MM_NOACCESS;
    }
 
    /* Return the final MM PTE protection mask */
    return ProtectMask;
}

Referenced by MiIsProtectionCompatible(), MiProtectVirtualMemory(), MmCreateArm3Section(), MmCreateSection(), MmCreateVirtualMappingUnsafeEx(), 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 1039 of file section.c.

{
    PVOID Base;
    PCONTROL_AREA ControlArea;
    ULONG Buckets;
    LONGLONG SectionSize;
    NTSTATUS Status;
    PAGED_CODE();
 
    /* Get the control area, check for any flags ARM3 doesn't yet support */
    ControlArea = ((PSECTION)Section)->Segment->ControlArea;
    ASSERT(ControlArea->u.Flags.Image == 0);
    ASSERT(ControlArea->FilePointer == NULL);
    ASSERT(ControlArea->u.Flags.GlobalOnlyPerSession == 0);
    ASSERT(ControlArea->u.Flags.Rom == 0);
    ASSERT(ControlArea->u.Flags.WasPurged == 0);
 
    /* Increase the reference and map count on the control area, no purges yet */
    Status = MiCheckPurgeAndUpMapCount(ControlArea, FALSE);
    ASSERT(NT_SUCCESS(Status));
 
    /* Get the section size at creation time */
    SectionSize = ((PSECTION)Section)->SizeOfSection.QuadPart;
 
    /* If the caller didn't specify a view size, assume until the end of the section */
    if (!(*ViewSize))
    {
        /* Check for overflow first */
        if ((SectionSize - SectionOffset->QuadPart) > SIZE_T_MAX)
        {
            DPRINT1("Section end is too far away from the specified offset.\n");
            MiDereferenceControlArea(ControlArea);
            return STATUS_INVALID_VIEW_SIZE;
        }
        *ViewSize = SectionSize - SectionOffset->QuadPart;
    }
 
    /* Check overflow */
    if ((SectionOffset->QuadPart + *ViewSize) < SectionOffset->QuadPart)
    {
        DPRINT1("Integer overflow between size & offset!\n");
        MiDereferenceControlArea(ControlArea);
        return STATUS_INVALID_VIEW_SIZE;
    }
 
    /* Check if the caller wanted a larger section than the view */
    if (SectionOffset->QuadPart + *ViewSize > SectionSize)
    {
        /* Fail */
        DPRINT1("View is too large\n");
        MiDereferenceControlArea(ControlArea);
        return STATUS_INVALID_VIEW_SIZE;
    }
 
    /* Get the number of 64K buckets required for this mapping */
    Buckets = (ULONG)(*ViewSize / MI_SYSTEM_VIEW_BUCKET_SIZE);
    if (*ViewSize & (MI_SYSTEM_VIEW_BUCKET_SIZE - 1)) Buckets++;
 
    /* Check if the view is more than 4GB large */
    if (Buckets >= MI_SYSTEM_VIEW_BUCKET_SIZE)
    {
        /* Fail */
        DPRINT1("View is too large\n");
        MiDereferenceControlArea(ControlArea);
        return STATUS_INVALID_VIEW_SIZE;
    }
 
    /* Insert this view into system space and get a base address for it */
    Base = MiInsertInSystemSpace(Session, Buckets, ControlArea);
    if (!Base)
    {
        /* Fail */
        DPRINT1("Out of system space\n");
        MiDereferenceControlArea(ControlArea);
        return STATUS_NO_MEMORY;
    }
 
    /* What's the underlying session? */
    if (Session == &MmSession)
    {
        /* Create the PDEs needed for this mapping, and double-map them if needed */
        MiFillSystemPageDirectory(Base, Buckets * MI_SYSTEM_VIEW_BUCKET_SIZE);
        Status = STATUS_SUCCESS;
    }
    else
    {
        /* Create the PDEs needed for this mapping */
        Status = MiSessionCommitPageTables(Base,
                                           (PVOID)((ULONG_PTR)Base +
                                           Buckets * MI_SYSTEM_VIEW_BUCKET_SIZE));
        ASSERT(NT_SUCCESS(Status));
    }
 
    /* Create the actual prototype PTEs for this mapping */
    Status = MiAddMappedPtes(MiAddressToPte(Base),
                             BYTES_TO_PAGES(*ViewSize),
                             ControlArea,
                             SectionOffset->QuadPart);
    ASSERT(NT_SUCCESS(Status));
 
    /* Return the base address of the mapping and success */
    *MappedBase = Base;
    return STATUS_SUCCESS;
}

Referenced by MmMapViewInSessionSpace(), and MmMapViewInSystemSpaceEx().

◆ MiMapViewOfDataSection()

static NTSTATUS 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
	)

static

Definition at line 1151 of file section.c.

{
    PMMVAD_LONG Vad;
    ULONG_PTR StartAddress;
    ULONG_PTR ViewSizeInPages;
    PSUBSECTION Subsection;
    PSEGMENT Segment;
    PFN_NUMBER PteOffset;
    NTSTATUS Status;
    ULONG QuotaCharge = 0, QuotaExcess = 0;
    PMMPTE PointerPte, LastPte;
    MMPTE TempPte;
    ULONG Granularity = MM_VIRTMEM_GRANULARITY;
 
    DPRINT("Mapping ARM3 data section\n");
 
    /* Get the segment for this section */
    Segment = ControlArea->Segment;
 
#ifdef _M_IX86
    /* ALlow being less restrictive on x86. */
    if (AllocationType & MEM_DOS_LIM)
        Granularity = PAGE_SIZE;
#endif
 
    /* One can only reserve a file-based mapping, not shared memory! */
    if ((AllocationType & MEM_RESERVE) && !(ControlArea->FilePointer))
    {
        return STATUS_INVALID_PARAMETER_9;
    }
 
    /* First, increase the map count. No purging is supported yet */
    Status = MiCheckPurgeAndUpMapCount(ControlArea, FALSE);
    if (!NT_SUCCESS(Status)) return Status;
 
    /* Check if the caller specified the view size */
    if (!(*ViewSize))
    {
        LONGLONG ViewSizeLL;
 
        /* The caller did not, so pick a 64K aligned view size based on the offset */
        SectionOffset->LowPart &= ~(_64K - 1);
 
        /* Calculate size and make sure this fits */
        if (!NT_SUCCESS(RtlLongLongSub(Section->SizeOfSection.QuadPart, SectionOffset->QuadPart, &ViewSizeLL))
            || !NT_SUCCESS(RtlLongLongToSIZET(ViewSizeLL, ViewSize))
            || (*ViewSize > MAXLONG_PTR))
        {
            MiDereferenceControlArea(ControlArea);
            return STATUS_INVALID_VIEW_SIZE;
        }
    }
    else
    {
        /* A size was specified, align it to a 64K boundary
         * and check for overflow or huge value. */
        if (!NT_SUCCESS(RtlSIZETAdd(*ViewSize, SectionOffset->LowPart & (_64K - 1), ViewSize))
            || (*ViewSize > MAXLONG_PTR))
        {
            MiDereferenceControlArea(ControlArea);
            return STATUS_INVALID_VIEW_SIZE;
        }
 
        /* Align the offset as well to make this an aligned map */
        SectionOffset->LowPart &= ~((ULONG)_64K - 1);
    }
 
    /* We must be dealing with a 64KB aligned offset. This is a Windows ASSERT */
    ASSERT((SectionOffset->LowPart & ((ULONG)_64K - 1)) == 0);
 
    /* Windows ASSERTs for this flag */
    ASSERT(ControlArea->u.Flags.GlobalOnlyPerSession == 0);
 
    /* Get the subsection. We don't support LARGE_CONTROL_AREA in ARM3 */
    ASSERT(ControlArea->u.Flags.Rom == 0);
    Subsection = (PSUBSECTION)(ControlArea + 1);
 
    /* Sections with extended segments are not supported in ARM3 */
    ASSERT(Segment->SegmentFlags.TotalNumberOfPtes4132 == 0);
 
    /* Within this section, figure out which PTEs will describe the view */
    PteOffset = (PFN_NUMBER)(SectionOffset->QuadPart >> PAGE_SHIFT);
 
    /* The offset must be in this segment's PTE chunk and it must be valid. Windows ASSERTs */
    ASSERT(PteOffset < Segment->TotalNumberOfPtes);
    ASSERT(((SectionOffset->QuadPart + *ViewSize + PAGE_SIZE - 1) >> PAGE_SHIFT) >= PteOffset);
 
    /* In ARM3, only one subsection is used for now. It must contain these PTEs */
    ASSERT(PteOffset < Subsection->PtesInSubsection);
 
    /* In ARM3, only page-file backed sections (shared memory) are supported now */
    ASSERT(ControlArea->FilePointer == NULL);
 
    /* Windows ASSERTs for this too -- there must be a subsection base address */
    ASSERT(Subsection->SubsectionBase != NULL);
 
    /* Compute how much commit space the segment will take */
    if ((CommitSize) && (Segment->NumberOfCommittedPages < Segment->TotalNumberOfPtes))
    {
        /* Charge for the maximum pages */
        QuotaCharge = BYTES_TO_PAGES(CommitSize);
    }
 
    /* ARM3 does not currently support large pages */
    ASSERT(Segment->SegmentFlags.LargePages == 0);
 
    /* Calculate how many pages the region spans */
    ViewSizeInPages = BYTES_TO_PAGES(*ViewSize);
 
    /* A VAD can now be allocated. Do so and zero it out */
    /* FIXME: we are allocating a LONG VAD for ReactOS compatibility only */
    ASSERT((AllocationType & MEM_RESERVE) == 0); /* ARM3 does not support this */
    Vad = ExAllocatePoolWithTag(NonPagedPool, sizeof(MMVAD_LONG), 'ldaV');
    if (!Vad)
    {
        MiDereferenceControlArea(ControlArea);
        return STATUS_INSUFFICIENT_RESOURCES;
    }
 
    RtlZeroMemory(Vad, sizeof(MMVAD_LONG));
    Vad->u4.Banked = (PVOID)(ULONG_PTR)0xDEADBABEDEADBABEULL;
 
    /* Write all the data required in the VAD for handling a fault */
    Vad->ControlArea = ControlArea;
    Vad->u.VadFlags.CommitCharge = 0;
    Vad->u.VadFlags.Protection = ProtectionMask;
    Vad->u2.VadFlags2.FileOffset = (ULONG)(SectionOffset->QuadPart >> 16);
    Vad->u2.VadFlags2.Inherit = (InheritDisposition == ViewShare);
    if ((AllocationType & SEC_NO_CHANGE) || (Section->u.Flags.NoChange))
    {
        /* This isn't really implemented yet, but handle setting the flag */
        Vad->u.VadFlags.NoChange = 1;
        Vad->u2.VadFlags2.SecNoChange = 1;
    }
 
    /* Finally, write down the first and last prototype PTE */
    Vad->FirstPrototypePte = &Subsection->SubsectionBase[PteOffset];
    PteOffset += ViewSizeInPages - 1;
    ASSERT(PteOffset < Subsection->PtesInSubsection);
    Vad->LastContiguousPte = &Subsection->SubsectionBase[PteOffset];
 
    /* Make sure the prototype PTE ranges make sense, this is a Windows ASSERT */
    ASSERT(Vad->FirstPrototypePte <= Vad->LastContiguousPte);
 
    /* FIXME: Should setup VAD bitmap */
    Status = STATUS_SUCCESS;
 
    /* Check if anything was committed */
    if (QuotaCharge)
    {
        /* Set the start and end PTE addresses, and pick the template PTE */
        PointerPte = Vad->FirstPrototypePte;
        LastPte = PointerPte + BYTES_TO_PAGES(CommitSize);
        TempPte = Segment->SegmentPteTemplate;
 
        /* Acquire the commit lock and loop all prototype PTEs to be committed */
        KeAcquireGuardedMutex(&MmSectionCommitMutex);
        while (PointerPte < LastPte)
        {
            /* Make sure the PTE is already invalid */
            if (PointerPte->u.Long == 0)
            {
                /* And write the invalid PTE */
                MI_WRITE_INVALID_PTE(PointerPte, TempPte);
            }
            else
            {
                /* The PTE is valid, so skip it */
                QuotaExcess++;
            }
 
            /* Move to the next PTE */
            PointerPte++;
        }
 
        /* Now check how many pages exactly we committed, and update accounting */
        ASSERT(QuotaCharge >= QuotaExcess);
        QuotaCharge -= QuotaExcess;
        Segment->NumberOfCommittedPages += QuotaCharge;
        ASSERT(Segment->NumberOfCommittedPages <= Segment->TotalNumberOfPtes);
 
        /* Now that we're done, release the lock */
        KeReleaseGuardedMutex(&MmSectionCommitMutex);
    }
 
    /* Is it SEC_BASED, or did the caller manually specify an address? */
    if (*BaseAddress != NULL)
    {
        /* Just align what the caller gave us */
        StartAddress = ALIGN_DOWN_BY((ULONG_PTR)*BaseAddress, Granularity);
    }
    else if (Section->Address.StartingVpn != 0)
    {
        /* It is a SEC_BASED mapping, use the address that was generated */
        StartAddress = Section->Address.StartingVpn + SectionOffset->LowPart;
    }
    else
    {
        StartAddress = 0;
    }
 
    Status = PsChargeProcessNonPagedPoolQuota(Process, sizeof(MMVAD_LONG));
    if (!NT_SUCCESS(Status))
    {
        ExFreePoolWithTag(Vad, 'ldaV');
        MiDereferenceControlArea(ControlArea);
 
        KeAcquireGuardedMutex(&MmSectionCommitMutex);
        Segment->NumberOfCommittedPages -= QuotaCharge;
        KeReleaseGuardedMutex(&MmSectionCommitMutex);
        return Status;
    }
 
    /* Insert the VAD */
    Status = MiInsertVadEx((PMMVAD)Vad,
                           &StartAddress,
                           ViewSizeInPages * PAGE_SIZE,
                           MAXULONG_PTR >> ZeroBits,
                           Granularity,
                           AllocationType);
    if (!NT_SUCCESS(Status))
    {
        ExFreePoolWithTag(Vad, 'ldaV');
        MiDereferenceControlArea(ControlArea);
 
        KeAcquireGuardedMutex(&MmSectionCommitMutex);
        Segment->NumberOfCommittedPages -= QuotaCharge;
        KeReleaseGuardedMutex(&MmSectionCommitMutex);
 
        PsReturnProcessNonPagedPoolQuota(PsGetCurrentProcess(), sizeof(MMVAD_LONG));
        return Status;
    }
 
    /* Windows stores this for accounting purposes, do so as well */
    if (!Segment->u2.FirstMappedVa) Segment->u2.FirstMappedVa = (PVOID)StartAddress;
 
    /* Finally, let the caller know where, and for what size, the view was mapped */
    *ViewSize = ViewSizeInPages * PAGE_SIZE;
    *BaseAddress = (PVOID)StartAddress;
    DPRINT("Start and region: 0x%p, 0x%p\n", *BaseAddress, *ViewSize);
    return STATUS_SUCCESS;
}

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 1754 of file section.c.

{
    PEPROCESS Process;
    NTSTATUS Status;
    UNICODE_STRING ModuleFileName;
    PMEMORY_SECTION_NAME SectionName = NULL;
    KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
 
    Status = ObReferenceObjectByHandle(ProcessHandle,
                                       PROCESS_QUERY_INFORMATION,
                                       NULL,
                                       PreviousMode,
                                       (PVOID*)(&Process),
                                       NULL);
 
    if (!NT_SUCCESS(Status))
    {
        DPRINT("MiQueryMemorySectionName: ObReferenceObjectByHandle returned %x\n",Status);
        return Status;
    }
 
    Status = MmGetFileNameForAddress(BaseAddress, &ModuleFileName);
 
    if (NT_SUCCESS(Status))
    {
        SectionName = MemoryInformation;
        if (PreviousMode != KernelMode)
        {
            _SEH2_TRY
            {
                RtlInitEmptyUnicodeString(&SectionName->SectionFileName,
                                          (PWSTR)(SectionName + 1),
                                          MemoryInformationLength - sizeof(MEMORY_SECTION_NAME));
                RtlCopyUnicodeString(&SectionName->SectionFileName, &ModuleFileName);
 
                if (ReturnLength) *ReturnLength = ModuleFileName.Length + sizeof(MEMORY_SECTION_NAME);
 
            }
            _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
            {
                Status = _SEH2_GetExceptionCode();
            }
            _SEH2_END;
        }
        else
        {
            RtlInitEmptyUnicodeString(&SectionName->SectionFileName,
                                      (PWSTR)(SectionName + 1),
                                      MemoryInformationLength - sizeof(MEMORY_SECTION_NAME));
            RtlCopyUnicodeString(&SectionName->SectionFileName, &ModuleFileName);
 
            if (ReturnLength) *ReturnLength = ModuleFileName.Length + sizeof(MEMORY_SECTION_NAME);
 
        }
 
        RtlFreeUnicodeString(&ModuleFileName);
    }
    ObDereferenceObject(Process);
    return Status;
}

Referenced by NtQueryVirtualMemory().

◆ MiRemoveFromSystemSpace()

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

static

Definition at line 2024 of file section.c.

{
    ULONG Hash, Size, Count = 0;
    ULONG_PTR Entry;
    PAGED_CODE();
 
    /* Compute the hash for this entry and loop trying to find it */
    Entry = (ULONG_PTR)Base >> 16;
    Hash = Entry % Session->SystemSpaceHashKey;
    while ((Session->SystemSpaceViewTable[Hash].Entry >> 16) != Entry)
    {
        /* Check if we overflew past the end of the hash table */
        if (++Hash >= Session->SystemSpaceHashSize)
        {
            /* Reset the hash to zero and keep searching from the bottom */
            Hash = 0;
            if (++Count == 2)
            {
                /* But if we overflew twice, then this is not a real mapping */
                KeBugCheckEx(DRIVER_UNMAPPING_INVALID_VIEW,
                             (ULONG_PTR)Base,
                             1,
                             0,
                             0);
            }
        }
    }
 
    /* One less entry */
    Session->SystemSpaceHashEntries--;
 
    /* Extract the size and clear the entry */
    Size = Session->SystemSpaceViewTable[Hash].Entry & 0xFFFF;
    Session->SystemSpaceViewTable[Hash].Entry = 0;
 
    /* Return the control area and the size */
    *ControlArea = Session->SystemSpaceViewTable[Hash].ControlArea;
    return Size;
}

Referenced by MiUnmapViewInSystemSpace().

◆ MiRemoveMappedPtes()

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

static

Definition at line 1922 of file section.c.

{
    PMMPTE PointerPte, ProtoPte;//, FirstPte;
    PMMPDE PointerPde, SystemMapPde;
    PMMPFN Pfn1, Pfn2;
    MMPTE PteContents;
    KIRQL OldIrql;
    DPRINT("Removing mapped view at: 0x%p\n", BaseAddress);
 
    ASSERT(Ws == NULL);
 
    /* Get the PTE and loop each one */
    PointerPte = MiAddressToPte(BaseAddress);
    //FirstPte = PointerPte;
    while (NumberOfPtes)
    {
        /* Check if the PTE is already valid */
        PteContents = *PointerPte;
        if (PteContents.u.Hard.Valid == 1)
        {
            /* Get the PFN entry */
            Pfn1 = MiGetPfnEntry(PFN_FROM_PTE(&PteContents));
 
            /* Get the PTE */
            PointerPde = MiPteToPde(PointerPte);
 
            /* Lock the PFN database and make sure this isn't a mapped file */
            OldIrql = MiAcquirePfnLock();
            ASSERT(((Pfn1->u3.e1.PrototypePte) && (Pfn1->OriginalPte.u.Soft.Prototype)) == 0);
 
            /* Mark the page as modified accordingly */
            if (MI_IS_PAGE_DIRTY(&PteContents))
                Pfn1->u3.e1.Modified = 1;
 
            /* Was the PDE invalid */
            if (PointerPde->u.Long == 0)
            {
#if (_MI_PAGING_LEVELS == 2)
                /* Find the system double-mapped PDE that describes this mapping */
                SystemMapPde = &MmSystemPagePtes[((ULONG_PTR)PointerPde & (SYSTEM_PD_SIZE - 1)) / sizeof(MMPTE)];
 
                /* Make it valid */
                ASSERT(SystemMapPde->u.Hard.Valid == 1);
                MI_WRITE_VALID_PDE(PointerPde, *SystemMapPde);
#else
                DBG_UNREFERENCED_LOCAL_VARIABLE(SystemMapPde);
                ASSERT(FALSE);
#endif
            }
 
            /* Dereference the PDE and the PTE */
            Pfn2 = MiGetPfnEntry(PFN_FROM_PTE(PointerPde));
            MiDecrementShareCount(Pfn2, PFN_FROM_PTE(PointerPde));
            DBG_UNREFERENCED_LOCAL_VARIABLE(Pfn2);
            MiDecrementShareCount(Pfn1, PFN_FROM_PTE(&PteContents));
 
            /* Release the PFN lock */
            MiReleasePfnLock(OldIrql);
        }
        else
        {
            /* Windows ASSERT */
            ASSERT((PteContents.u.Long == 0) || (PteContents.u.Soft.Prototype == 1));
 
            /* Check if this is a prototype pointer PTE */
            if (PteContents.u.Soft.Prototype == 1)
            {
                /* Get the prototype PTE */
                ProtoPte = MiProtoPteToPte(&PteContents);
 
                /* We don't support anything else atm */
                ASSERT(ProtoPte->u.Long == 0);
            }
        }
 
        /* Make the PTE into a zero PTE */
        PointerPte->u.Long = 0;
 
        /* Move to the next PTE */
        PointerPte++;
        NumberOfPtes--;
    }
 
    /* Flush the TLB */
    KeFlushCurrentTb();
 
    /* Acquire the PFN lock */
    OldIrql = MiAcquirePfnLock();
 
    /* Decrement the accounting counters */
    ControlArea->NumberOfUserReferences--;
    ControlArea->NumberOfMappedViews--;
 
    /* Check if we should destroy the CA and release the lock */
    MiCheckControlArea(ControlArea, OldIrql);
}

Referenced by MiUnmapViewInSystemSpace().

◆ MiRemoveMappedView()

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

Definition at line 766 of file section.c.

{
    KIRQL OldIrql;
    PCONTROL_AREA ControlArea;
    PETHREAD CurrentThread = PsGetCurrentThread();
 
    /* Get the control area */
    ControlArea = Vad->ControlArea;
 
    /* We only support non-extendable, non-image, pagefile-backed regular sections */
    ASSERT(Vad->u.VadFlags.VadType == VadNone);
    ASSERT(Vad->u2.VadFlags2.ExtendableFile == FALSE);
    ASSERT(ControlArea);
    ASSERT(ControlArea->FilePointer == NULL);
    ASSERT(!MI_IS_MEMORY_AREA_VAD(Vad));
 
    /* Delete the actual virtual memory pages */
    MiDeleteVirtualAddresses(Vad->StartingVpn << PAGE_SHIFT,
                             (Vad->EndingVpn << PAGE_SHIFT) | (PAGE_SIZE - 1),
                             Vad);
 
    /* Release the working set */
    MiUnlockProcessWorkingSetUnsafe(CurrentProcess, CurrentThread);
 
    /* Lock the PFN database */
    OldIrql = MiAcquirePfnLock();
 
    /* Remove references */
    ControlArea->NumberOfMappedViews--;
    ControlArea->NumberOfUserReferences--;
 
    /* Check if it should be destroyed */
    MiCheckControlArea(ControlArea, OldIrql);
}

Referenced by MiUnmapViewOfSection(), and MmCleanProcessAddressSpace().

◆ MiSegmentDelete()

static VOID MiSegmentDelete ( IN PSEGMENT Segment )

static

Definition at line 591 of file section.c.

{
    PCONTROL_AREA ControlArea;
    SEGMENT_FLAGS SegmentFlags;
    PSUBSECTION Subsection;
    PMMPTE PointerPte, LastPte, PteForProto;
    PMMPFN Pfn1;
    PFN_NUMBER PageFrameIndex;
    MMPTE TempPte;
    KIRQL OldIrql;
 
    /* Capture data */
    SegmentFlags = Segment->SegmentFlags;
    ControlArea = Segment->ControlArea;
 
    /* Make sure control area is on the right delete path */
    ASSERT(ControlArea->u.Flags.BeingDeleted == 1);
    ASSERT(ControlArea->WritableUserReferences == 0);
 
    /* These things are not supported yet */
    ASSERT(ControlArea->DereferenceList.Flink == NULL);
    ASSERT(!(ControlArea->u.Flags.Image) && !(ControlArea->u.Flags.File));
    ASSERT(ControlArea->u.Flags.GlobalOnlyPerSession == 0);
    ASSERT(ControlArea->u.Flags.Rom == 0);
 
    /* Get the subsection and PTEs for this segment */
    Subsection = (PSUBSECTION)(ControlArea + 1);
    PointerPte = Subsection->SubsectionBase;
    LastPte = PointerPte + Segment->NonExtendedPtes;
 
    /* Lock the PFN database */
    OldIrql = MiAcquirePfnLock();
 
    /* Check if the master PTE is invalid */
    PteForProto = MiAddressToPte(PointerPte);
    if (!PteForProto->u.Hard.Valid)
    {
        /* Fault it in */
        MiMakeSystemAddressValidPfn(PointerPte, OldIrql);
    }
 
    /* Loop all the segment PTEs */
    while (PointerPte < LastPte)
    {
        /* Check if it's time to switch master PTEs if we passed a PDE boundary */
        if (MiIsPteOnPdeBoundary(PointerPte) &&
            (PointerPte != Subsection->SubsectionBase))
        {
            /* Check if the master PTE is invalid */
            PteForProto = MiAddressToPte(PointerPte);
            if (!PteForProto->u.Hard.Valid)
            {
                /* Fault it in */
                MiMakeSystemAddressValidPfn(PointerPte, OldIrql);
            }
        }
 
        /* This should be a prototype PTE */
        TempPte = *PointerPte;
        ASSERT(SegmentFlags.LargePages == 0);
        ASSERT(TempPte.u.Hard.Valid == 0);
 
        /* See if we should clean things up */
        if (!(ControlArea->u.Flags.Image) && !(ControlArea->u.Flags.File))
        {
            /*
             * This is a section backed by the pagefile. Now that it doesn't exist anymore,
             * we can give everything back to the system.
             */
            ASSERT(TempPte.u.Soft.Prototype == 0);
 
            if (TempPte.u.Soft.Transition == 1)
            {
                /* We can give the page back for other use */
                DPRINT("Releasing page for transition PTE %p\n", PointerPte);
                PageFrameIndex = PFN_FROM_PTE(&TempPte);
                Pfn1 = MI_PFN_ELEMENT(PageFrameIndex);
 
                /* As this is a paged-backed section, nobody should reference it anymore (no cache or whatever) */
                ASSERT(Pfn1->u3.ReferenceCount == 0);
 
                /* And it should be in standby or modified list */
                ASSERT((Pfn1->u3.e1.PageLocation == ModifiedPageList) || (Pfn1->u3.e1.PageLocation == StandbyPageList));
 
                /* Unlink it and put it back in free list */
                MiUnlinkPageFromList(Pfn1);
 
                /* Temporarily mark this as active and make it free again */
                Pfn1->u3.e1.PageLocation = ActiveAndValid;
                MI_SET_PFN_DELETED(Pfn1);
 
                MiInsertPageInFreeList(PageFrameIndex);
            }
            else if (TempPte.u.Soft.PageFileHigh != 0)
            {
                /* Should not happen for now */
                ASSERT(FALSE);
            }
        }
        else
        {
            /* unsupported for now */
            ASSERT(FALSE);
 
            /* File-backed section must have prototype PTEs */
            ASSERT(TempPte.u.Soft.Prototype == 1);
        }
 
        /* Zero the PTE and keep going */
        PointerPte->u.Long = 0;
        PointerPte++;
    }
 
    /* Release the PFN lock */
    MiReleasePfnLock(OldIrql);
 
    /* Free the structures */
    ExFreePool(ControlArea);
    ExFreePool(Segment);
}

Referenced by MiCheckControlArea().

◆ MiSessionCommitPageTables()

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

static

Definition at line 923 of file section.c.

{
    KIRQL OldIrql;
    ULONG Color, Index;
    PMMPDE StartPde, EndPde;
    MMPDE TempPde = ValidKernelPdeLocal;
    PMMPFN Pfn1;
    PFN_NUMBER PageCount = 0, ActualPages = 0, PageFrameNumber;
 
    /* Windows sanity checks */
    ASSERT(StartVa >= (PVOID)MmSessionBase);
    ASSERT(EndVa < (PVOID)MiSessionSpaceEnd);
    ASSERT(PAGE_ALIGN(EndVa) == EndVa);
 
    /* Get the start and end PDE, then loop each one */
    StartPde = MiAddressToPde(StartVa);
    EndPde = MiAddressToPde((PVOID)((ULONG_PTR)EndVa - 1));
    Index = ((ULONG_PTR)StartVa - (ULONG_PTR)MmSessionBase) >> 22;
    while (StartPde <= EndPde)
    {
#ifndef _M_AMD64
        /* If we don't already have a page table for it, increment count */
        if (MmSessionSpace->PageTables[Index].u.Long == 0) PageCount++;
#endif
        /* Move to the next one */
        StartPde++;
        Index++;
    }
 
    /* If there's no page tables to create, bail out */
    if (PageCount == 0) return STATUS_SUCCESS;
 
    /* Reset the start PDE and index */
    StartPde = MiAddressToPde(StartVa);
    Index = ((ULONG_PTR)StartVa - (ULONG_PTR)MmSessionBase) >> 22;
 
    /* Loop each PDE while holding the working set lock */
//  MiLockWorkingSet(PsGetCurrentThread(),
//                   &MmSessionSpace->GlobalVirtualAddress->Vm);
#ifdef _M_AMD64
_WARN("MiSessionCommitPageTables halfplemented for amd64")
    DBG_UNREFERENCED_LOCAL_VARIABLE(OldIrql);
    DBG_UNREFERENCED_LOCAL_VARIABLE(Color);
    DBG_UNREFERENCED_LOCAL_VARIABLE(TempPde);
    DBG_UNREFERENCED_LOCAL_VARIABLE(Pfn1);
    DBG_UNREFERENCED_LOCAL_VARIABLE(PageFrameNumber);
    ASSERT(FALSE);
#else
    while (StartPde <= EndPde)
    {
        /* Check if we already have a page table */
        if (MmSessionSpace->PageTables[Index].u.Long == 0)
        {
            /* We don't, so the PDE shouldn't be ready yet */
            ASSERT(StartPde->u.Hard.Valid == 0);
 
            /* ReactOS check to avoid MiEnsureAvailablePageOrWait */
            ASSERT(MmAvailablePages >= 32);
 
            /* Acquire the PFN lock and grab a zero page */
            OldIrql = MiAcquirePfnLock();
            MI_SET_USAGE(MI_USAGE_PAGE_TABLE);
            MI_SET_PROCESS2(PsGetCurrentProcess()->ImageFileName);
            Color = (++MmSessionSpace->Color) & MmSecondaryColorMask;
            PageFrameNumber = MiRemoveZeroPage(Color);
            TempPde.u.Hard.PageFrameNumber = PageFrameNumber;
            MI_WRITE_VALID_PDE(StartPde, TempPde);
 
            /* Write the page table in session space structure */
            ASSERT(MmSessionSpace->PageTables[Index].u.Long == 0);
            MmSessionSpace->PageTables[Index] = TempPde;
 
            /* Initialize the PFN */
            MiInitializePfnForOtherProcess(PageFrameNumber,
                                           StartPde,
                                           MmSessionSpace->SessionPageDirectoryIndex);
 
            /* And now release the lock */
            MiReleasePfnLock(OldIrql);
 
            /* Get the PFN entry and make sure there's no event for it */
            Pfn1 = MI_PFN_ELEMENT(PageFrameNumber);
            ASSERT(Pfn1->u1.Event == NULL);
 
            /* Increment the number of pages */
            ActualPages++;
        }
 
        /* Move to the next PDE */
        StartPde++;
        Index++;
    }
#endif
 
    /* Make sure we didn't do more pages than expected */
    ASSERT(ActualPages <= PageCount);
 
    /* Release the working set lock */
//  MiUnlockWorkingSet(PsGetCurrentThread(),
//                     &MmSessionSpace->GlobalVirtualAddress->Vm);
 
 
    /* If we did at least one page... */
    if (ActualPages)
    {
        /* Update the performance counters! */
        InterlockedExchangeAddSizeT(&MmSessionSpace->NonPageablePages, ActualPages);
        InterlockedExchangeAddSizeT(&MmSessionSpace->CommittedPages, ActualPages);
    }
 
    /* Return status */
    return STATUS_SUCCESS;
}

Referenced by MiMapViewInSystemSpace().

◆ MiUnmapViewInSystemSpace()

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

static

Definition at line 2068 of file section.c.

{
    ULONG Size;
    PCONTROL_AREA ControlArea;
    PAGED_CODE();
 
    /* Remove this mapping */
    KeAcquireGuardedMutex(Session->SystemSpaceViewLockPointer);
    Size = MiRemoveFromSystemSpace(Session, MappedBase, &ControlArea);
 
    /* Clear the bits for this mapping */
    RtlClearBits(Session->SystemSpaceBitMap,
                 (ULONG)(((ULONG_PTR)MappedBase - (ULONG_PTR)Session->SystemSpaceViewStart) >> 16),
                 Size);
 
    /* Convert the size from a bit size into the actual size */
    Size = Size * (_64K >> PAGE_SHIFT);
 
    /* Remove the PTEs now */
    MiRemoveMappedPtes(MappedBase, Size, ControlArea, NULL);
    KeReleaseGuardedMutex(Session->SystemSpaceViewLockPointer);
 
    /* Return success */
    return STATUS_SUCCESS;
}

Referenced by MmUnmapViewInSessionSpace(), and MmUnmapViewInSystemSpace().

◆ MiUnmapViewOfSection()

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

static

Definition at line 804 of file section.c.

{
    BOOLEAN Attached = FALSE;
    KAPC_STATE ApcState;
    PMMVAD Vad;
    PVOID DbgBase = NULL;
    SIZE_T RegionSize;
    NTSTATUS Status;
    PETHREAD CurrentThread = PsGetCurrentThread();
    PEPROCESS CurrentProcess = PsGetCurrentProcess();
    PAGED_CODE();
 
    /* Check if we need to lock the address space */
    if (!Flags) MmLockAddressSpace(&Process->Vm);
 
    /* Find the VAD for the address and make sure it's a section VAD */
    Vad = MiLocateVad(&Process->VadRoot, BaseAddress);
    if (!(Vad) || (Vad->u.VadFlags.PrivateMemory))
    {
        /* Couldn't find it, or invalid VAD, fail */
        DPRINT1("No VAD or invalid VAD\n");
        if (!Flags) MmUnlockAddressSpace(&Process->Vm);
        return STATUS_NOT_MAPPED_VIEW;
    }
 
    /* Check for RosMm memory area */
    if (MI_IS_MEMORY_AREA_VAD(Vad))
    {
        /* Call Mm API */
        ASSERT(MI_IS_ROSMM_VAD(Vad));
        Status = MiRosUnmapViewOfSection(Process, (PMEMORY_AREA)Vad, BaseAddress, Process->ProcessExiting);
        if (!Flags) MmUnlockAddressSpace(&Process->Vm);
        return Status;
    }
 
    /* Check if we should attach to the process */
    if (CurrentProcess != Process)
    {
        /* The process is different, do an attach */
        KeStackAttachProcess(&Process->Pcb, &ApcState);
        Attached = TRUE;
    }
 
    /* Check if the process is already dead */
    if (Process->VmDeleted)
    {
        /* Fail the call */
        DPRINT1("Process died!\n");
        if (!Flags) MmUnlockAddressSpace(&Process->Vm);
        Status = STATUS_PROCESS_IS_TERMINATING;
        goto Quickie;
    }
 
    /* We should be attached */
    ASSERT(Process == PsGetCurrentProcess());
 
    /* We need the base address for the debugger message on image-backed VADs */
    if (Vad->u.VadFlags.VadType == VadImageMap)
    {
        DbgBase = (PVOID)(Vad->StartingVpn >> PAGE_SHIFT);
    }
 
    /* Compute the size of the VAD region */
    RegionSize = PAGE_SIZE + ((Vad->EndingVpn - Vad->StartingVpn) << PAGE_SHIFT);
 
    /* For SEC_NO_CHANGE sections, we need some extra checks */
    if (Vad->u.VadFlags.NoChange == 1)
    {
        /* Are we allowed to mess with this VAD? */
        Status = MiCheckSecuredVad(Vad,
                                   (PVOID)(Vad->StartingVpn >> PAGE_SHIFT),
                                   RegionSize,
                                   MM_DELETE_CHECK);
        if (!NT_SUCCESS(Status))
        {
            /* We failed */
            DPRINT1("Trying to unmap protected VAD!\n");
            if (!Flags) MmUnlockAddressSpace(&Process->Vm);
            goto Quickie;
        }
    }
 
    /* Not currently supported */
    ASSERT(Vad->u.VadFlags.VadType != VadRotatePhysical);
 
    /* FIXME: Remove VAD charges */
 
    /* Lock the working set */
    MiLockProcessWorkingSetUnsafe(Process, CurrentThread);
 
    /* Remove the VAD */
    ASSERT(Process->VadRoot.NumberGenericTableElements >= 1);
    MiRemoveNode((PMMADDRESS_NODE)Vad, &Process->VadRoot);
    PsReturnProcessNonPagedPoolQuota(Process, sizeof(MMVAD_LONG));
 
    /* Remove the PTEs for this view, which also releases the working set lock */
    MiRemoveMappedView(Process, Vad);
 
    /* FIXME: Remove commitment */
 
    /* Update performance counter and release the lock */
    Process->VirtualSize -= RegionSize;
    if (!Flags) MmUnlockAddressSpace(&Process->Vm);
 
    /* Destroy the VAD and return success */
    ExFreePool(Vad);
    Status = STATUS_SUCCESS;
 
    /* Failure and success case -- send debugger message, detach, and return */
Quickie:
    if (DbgBase) DbgkUnMapViewOfSection(DbgBase);
    if (Attached) KeUnstackDetachProcess(&ApcState);
    return Status;
}

Referenced by MmUnmapViewOfSection(), and NtUnmapViewOfSection().

◆ MmCommitSessionMappedView()

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

Definition at line 2788 of file section.c.

{
    ULONG_PTR StartAddress, EndingAddress, Base;
    ULONG Hash, Count = 0, Size, QuotaCharge;
    PMMSESSION Session;
    PMMPTE LastProtoPte, PointerPte, ProtoPte;
    PCONTROL_AREA ControlArea;
    PSEGMENT Segment;
    PSUBSECTION Subsection;
    MMPTE TempPte;
    PAGED_CODE();
 
    /* Make sure the base isn't past the session view range */
    if ((MappedBase < MiSessionViewStart) ||
        (MappedBase >= (PVOID)((ULONG_PTR)MiSessionViewStart + MmSessionViewSize)))
    {
        DPRINT1("Base outside of valid range\n");
        return STATUS_INVALID_PARAMETER_1;
    }
 
    /* Make sure the size isn't past the session view range */
    if (((ULONG_PTR)MiSessionViewStart + MmSessionViewSize -
        (ULONG_PTR)MappedBase) < ViewSize)
    {
        DPRINT1("Size outside of valid range\n");
        return STATUS_INVALID_PARAMETER_2;
    }
 
    /* Sanity check */
    ASSERT(ViewSize != 0);
 
    /* Process must be in a session */
    if (PsGetCurrentProcess()->ProcessInSession == FALSE)
    {
        DPRINT1("Process is not in session\n");
        return STATUS_NOT_MAPPED_VIEW;
    }
 
    /* Compute the correctly aligned base and end addresses */
    StartAddress = (ULONG_PTR)PAGE_ALIGN(MappedBase);
    EndingAddress = ((ULONG_PTR)MappedBase + ViewSize - 1) | (PAGE_SIZE - 1);
 
    /* Sanity check and grab the session */
    ASSERT(MmIsAddressValid(MmSessionSpace) == TRUE);
    Session = &MmSessionSpace->Session;
 
    /* Get the hash entry for this allocation */
    Hash = (StartAddress >> 16) % Session->SystemSpaceHashKey;
 
    /* Lock system space */
    KeAcquireGuardedMutex(Session->SystemSpaceViewLockPointer);
 
    /* Loop twice so we can try rolling over if needed */
    while (TRUE)
    {
        /* Extract the size and base addresses from the entry */
        Base = Session->SystemSpaceViewTable[Hash].Entry & ~0xFFFF;
        Size = Session->SystemSpaceViewTable[Hash].Entry & 0xFFFF;
 
        /* Convert the size to bucket chunks */
        Size *= MI_SYSTEM_VIEW_BUCKET_SIZE;
 
        /* Bail out if this entry fits in here */
        if ((StartAddress >= Base) && (EndingAddress < (Base + Size))) break;
 
        /* Check if we overflew past the end of the hash table */
        if (++Hash >= Session->SystemSpaceHashSize)
        {
            /* Reset the hash to zero and keep searching from the bottom */
            Hash = 0;
            if (++Count == 2)
            {
                /* But if we overflew twice, then this is not a real mapping */
                KeBugCheckEx(DRIVER_UNMAPPING_INVALID_VIEW,
                             Base,
                             2,
                             0,
                             0);
            }
        }
    }
 
    /* Make sure the view being mapped is not file-based */
    ControlArea = Session->SystemSpaceViewTable[Hash].ControlArea;
    if (ControlArea->FilePointer != NULL)
    {
        /* It is, so we have to bail out */
        DPRINT1("Only page-filed backed sections can be commited\n");
        KeReleaseGuardedMutex(Session->SystemSpaceViewLockPointer);
        return STATUS_ALREADY_COMMITTED;
    }
 
    /* Get the subsection. We don't support LARGE_CONTROL_AREA in ARM3 */
    ASSERT(ControlArea->u.Flags.GlobalOnlyPerSession == 0);
    ASSERT(ControlArea->u.Flags.Rom == 0);
    Subsection = (PSUBSECTION)(ControlArea + 1);
 
    /* Get the start and end PTEs -- make sure the end PTE isn't past the end */
    ProtoPte = Subsection->SubsectionBase + ((StartAddress - Base) >> PAGE_SHIFT);
    QuotaCharge = MiAddressToPte(EndingAddress) - MiAddressToPte(StartAddress) + 1;
    LastProtoPte = ProtoPte + QuotaCharge;
    if (LastProtoPte >= Subsection->SubsectionBase + Subsection->PtesInSubsection)
    {
        DPRINT1("PTE is out of bounds\n");
        KeReleaseGuardedMutex(Session->SystemSpaceViewLockPointer);
        return STATUS_INVALID_PARAMETER_2;
    }
 
    /* Acquire the commit lock and count all the non-committed PTEs */
    KeAcquireGuardedMutexUnsafe(&MmSectionCommitMutex);
    PointerPte = ProtoPte;
    while (PointerPte < LastProtoPte)
    {
        if (PointerPte->u.Long) QuotaCharge--;
        PointerPte++;
    }
 
    /* Was everything committed already? */
    if (!QuotaCharge)
    {
        /* Nothing to do! */
        KeReleaseGuardedMutexUnsafe(&MmSectionCommitMutex);
        KeReleaseGuardedMutex(Session->SystemSpaceViewLockPointer);
        return STATUS_SUCCESS;
    }
 
    /* Pick the segment and template PTE */
    Segment = ControlArea->Segment;
    TempPte = Segment->SegmentPteTemplate;
    ASSERT(TempPte.u.Long != 0);
 
    /* Loop all prototype PTEs to be committed */
    PointerPte = ProtoPte;
    while (PointerPte < LastProtoPte)
    {
        /* Make sure the PTE is already invalid */
        if (PointerPte->u.Long == 0)
        {
            /* And write the invalid PTE */
            MI_WRITE_INVALID_PTE(PointerPte, TempPte);
        }
 
        /* Move to the next PTE */
        PointerPte++;
    }
 
    /* Check if we had at least one page charged */
    if (QuotaCharge)
    {
        /* Update the accounting data */
        Segment->NumberOfCommittedPages += QuotaCharge;
        InterlockedExchangeAddSizeT(&MmSharedCommit, QuotaCharge);
    }
 
    /* Release all */
    KeReleaseGuardedMutexUnsafe(&MmSectionCommitMutex);
    KeReleaseGuardedMutex(Session->SystemSpaceViewLockPointer);
    return STATUS_SUCCESS;
}

◆ 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 2102 of file section.c.

{
    SECTION Section;
    PSECTION NewSection;
    PSUBSECTION Subsection;
    PSEGMENT NewSegment, Segment;
    NTSTATUS Status;
    PCONTROL_AREA ControlArea;
    ULONG ProtectionMask, ControlAreaSize, Size, NonPagedCharge, PagedCharge;
    KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
    BOOLEAN FileLock = FALSE, KernelCall = FALSE;
    KIRQL OldIrql;
    PFILE_OBJECT File;
    BOOLEAN UserRefIncremented = FALSE;
    PVOID PreviousSectionPointer;
 
    /* Make the same sanity checks that the Nt interface should've validated */
    ASSERT((AllocationAttributes & ~(SEC_COMMIT | SEC_RESERVE | SEC_BASED |
                                     SEC_LARGE_PAGES | SEC_IMAGE | SEC_NOCACHE |
                                     SEC_NO_CHANGE)) == 0);
    ASSERT((AllocationAttributes & (SEC_COMMIT | SEC_RESERVE | SEC_IMAGE)) != 0);
    ASSERT(!((AllocationAttributes & SEC_IMAGE) &&
             (AllocationAttributes & (SEC_COMMIT | SEC_RESERVE |
                                      SEC_NOCACHE | SEC_NO_CHANGE))));
    ASSERT(!((AllocationAttributes & SEC_COMMIT) && (AllocationAttributes & SEC_RESERVE)));
    ASSERT(!((SectionPageProtection & PAGE_NOCACHE) ||
             (SectionPageProtection & PAGE_WRITECOMBINE) ||
             (SectionPageProtection & PAGE_GUARD) ||
             (SectionPageProtection & PAGE_NOACCESS)));
 
    /* Convert section flag to page flag */
    if (AllocationAttributes & SEC_NOCACHE)
        SectionPageProtection |= PAGE_NOCACHE;
 
    /* Check to make sure the protection is correct. Nt* does this already */
    ProtectionMask = MiMakeProtectionMask(SectionPageProtection);
    if (ProtectionMask == MM_INVALID_PROTECTION)
    {
        DPRINT1("Invalid protection mask\n");
        return STATUS_INVALID_PAGE_PROTECTION;
    }
 
    /* Check if this is going to be a data or image backed file section */
    if ((FileHandle) || (FileObject))
    {
        /* These cannot be mapped with large pages */
        if (AllocationAttributes & SEC_LARGE_PAGES) return STATUS_INVALID_PARAMETER_6;
 
        /* For now, only support the mechanism through a file handle */
        ASSERT(FileObject == NULL);
 
        /* Reference the file handle to get the object */
        Status = ObReferenceObjectByHandle(FileHandle,
                                           MmMakeFileAccess[ProtectionMask],
                                           IoFileObjectType,
                                           PreviousMode,
                                           (PVOID*)&File,
                                           NULL);
        if (!NT_SUCCESS(Status)) return Status;
 
        /* Make sure Cc has been doing its job */
        if (!File->SectionObjectPointer)
        {
            /* This is not a valid file system-based file, fail */
            ObDereferenceObject(File);
            return STATUS_INVALID_FILE_FOR_SECTION;
        }
 
        /* Image-file backed sections are not yet supported */
        ASSERT((AllocationAttributes & SEC_IMAGE) == 0);
 
        /* Compute the size of the control area, and allocate it */
        ControlAreaSize = sizeof(CONTROL_AREA) + sizeof(MSUBSECTION);
        ControlArea = ExAllocatePoolWithTag(NonPagedPool, ControlAreaSize, 'aCmM');
        if (!ControlArea)
        {
            ObDereferenceObject(File);
            return STATUS_INSUFFICIENT_RESOURCES;
        }
 
        /* Zero it out */
        RtlZeroMemory(ControlArea, ControlAreaSize);
 
        /* Did we get a handle, or an object? */
        if (FileHandle)
        {
            /* We got a file handle so we have to lock down the file */
#if 0
            Status = FsRtlAcquireToCreateMappedSection(File, SectionPageProtection);
            if (!NT_SUCCESS(Status))
            {
                ExFreePool(ControlArea);
                ObDereferenceObject(File);
                return Status;
            }
#else
            /* ReactOS doesn't support this API yet, so do nothing */
            UNIMPLEMENTED;
            Status = STATUS_SUCCESS;
#endif
            /* Update the top-level IRP so that drivers know what's happening */
            IoSetTopLevelIrp((PIRP)FSRTL_FSP_TOP_LEVEL_IRP);
            FileLock = TRUE;
        }
 
        /* Lock the PFN database while we play with the section pointers */
        OldIrql = MiAcquirePfnLock();
 
        /* Image-file backed sections are not yet supported */
        ASSERT((AllocationAttributes & SEC_IMAGE) == 0);
 
        /* There should not already be a control area for this file */
        ASSERT(File->SectionObjectPointer->DataSectionObject == NULL);
        NewSegment = NULL;
 
        /* Write down that this CA is being created, and set it */
        ControlArea->u.Flags.BeingCreated = TRUE;
        ASSERT((AllocationAttributes & SEC_IMAGE) == 0);
        PreviousSectionPointer = File->SectionObjectPointer;
        File->SectionObjectPointer->DataSectionObject = ControlArea;
 
        /* We can release the PFN lock now */
        MiReleasePfnLock(OldIrql);
 
        /* We don't support previously-mapped file */
        ASSERT(NewSegment == NULL);
 
        /* Image-file backed sections are not yet supported */
        ASSERT((AllocationAttributes & SEC_IMAGE) == 0);
 
        /* So we always create a data file map */
        Status = MiCreateDataFileMap(File,
                                     &Segment,
                                     (PSIZE_T)InputMaximumSize,
                                     SectionPageProtection,
                                     AllocationAttributes,
                                     KernelCall);
        if (!NT_SUCCESS(Status))
        {
            /* Lock the PFN database while we play with the section pointers */
            OldIrql = MiAcquirePfnLock();
 
            /* Reset the waiting-for-deletion event */
            ASSERT(ControlArea->WaitingForDeletion == NULL);
            ControlArea->WaitingForDeletion = NULL;
 
            /* Set the file pointer NULL flag */
            ASSERT(ControlArea->u.Flags.FilePointerNull == 0);
            ControlArea->u.Flags.FilePointerNull = TRUE;
 
            /* Delete the data section object */
            ASSERT((AllocationAttributes & SEC_IMAGE) == 0);
            File->SectionObjectPointer->DataSectionObject = NULL;
 
            /* No longer being created */
            ControlArea->u.Flags.BeingCreated = FALSE;
 
            /* We can release the PFN lock now */
            MiReleasePfnLock(OldIrql);
 
            /* Check if we locked and set the IRP */
            if (FileLock)
            {
                /* Undo */
                IoSetTopLevelIrp(NULL);
                //FsRtlReleaseFile(File);
            }
 
            /* Free the control area and de-ref the file object */
            ExFreePool(ControlArea);
            ObDereferenceObject(File);
 
            /* All done */
            return Status;
        }
 
        /* On success, we expect this */
        ASSERT(PreviousSectionPointer == File->SectionObjectPointer);
 
        /* Check if a maximum size was specified */
        if (!InputMaximumSize->QuadPart)
        {
            /* Nope, use the segment size */
            Section.SizeOfSection.QuadPart = (LONGLONG)Segment->SizeOfSegment;
        }
        else
        {
            /* Yep, use the entered size */
            Section.SizeOfSection.QuadPart = InputMaximumSize->QuadPart;
        }
    }
    else
    {
        /* A handle must be supplied with SEC_IMAGE, as this is the no-handle path */
        if (AllocationAttributes & SEC_IMAGE) return STATUS_INVALID_FILE_FOR_SECTION;
 
        /* Not yet supported */
        ASSERT((AllocationAttributes & SEC_LARGE_PAGES) == 0);
 
        /* So this must be a pagefile-backed section, create the mappings needed */
        Status = MiCreatePagingFileMap(&NewSegment,
                                       InputMaximumSize,
                                       ProtectionMask,
                                       AllocationAttributes);
        if (!NT_SUCCESS(Status)) return Status;
 
        /* Set the size here, and read the control area */
        Section.SizeOfSection.QuadPart = NewSegment->SizeOfSegment;
        ControlArea = NewSegment->ControlArea;
 
        /* MiCreatePagingFileMap increments user references */
        UserRefIncremented = TRUE;
    }
 
    /* Did we already have a segment? */
    if (!NewSegment)
    {
        /* This must be the file path and we created a segment */
        NewSegment = Segment;
        ASSERT(File != NULL);
 
        /* Acquire the PFN lock while we set control area flags */
        OldIrql = MiAcquirePfnLock();
 
        /* We don't support this race condition yet, so assume no waiters */
        ASSERT(ControlArea->WaitingForDeletion == NULL);
        ControlArea->WaitingForDeletion = NULL;
 
        /* Image-file backed sections are not yet supported, nor ROM images */
        ASSERT((AllocationAttributes & SEC_IMAGE) == 0);
        ASSERT(Segment->ControlArea->u.Flags.Rom == 0);
 
        /* Take off the being created flag, and then release the lock */
        ControlArea->u.Flags.BeingCreated = FALSE;
        MiReleasePfnLock(OldIrql);
    }
 
    /* Check if we locked the file earlier */
    if (FileLock)
    {
        /* Reset the top-level IRP and release the lock */
        IoSetTopLevelIrp(NULL);
        //FsRtlReleaseFile(File);
        FileLock = FALSE;
    }
 
    /* Set the initial section object data */
    Section.InitialPageProtection = SectionPageProtection;
 
    /* The mapping created a control area and segment, save the flags */
    Section.Segment = NewSegment;
    Section.u.LongFlags = ControlArea->u.LongFlags;
 
    /* Check if this is a user-mode read-write non-image file mapping */
    if (!(FileObject) &&
        (SectionPageProtection & (PAGE_READWRITE | PAGE_EXECUTE_READWRITE)) &&
        !(ControlArea->u.Flags.Image) &&
        (ControlArea->FilePointer))
    {
        /* Add a reference and set the flag */
        Section.u.Flags.UserWritable = TRUE;
        InterlockedIncrement((volatile LONG*)&ControlArea->WritableUserReferences);
    }
 
    /* Check for image mappings or page file mappings */
    if ((ControlArea->u.Flags.Image) || !(ControlArea->FilePointer))
    {
        /* Charge the segment size, and allocate a subsection */
        PagedCharge = sizeof(SECTION) + NewSegment->TotalNumberOfPtes * sizeof(MMPTE);
        Size = sizeof(SUBSECTION);
    }
    else
    {
        /* Charge nothing, and allocate a mapped subsection */
        PagedCharge = 0;
        Size = sizeof(MSUBSECTION);
    }
 
    /* Check if this is a normal CA */
    ASSERT(ControlArea->u.Flags.GlobalOnlyPerSession == 0);
    ASSERT(ControlArea->u.Flags.Rom == 0);
 
    /* Charge only a CA, and the subsection is right after */
    NonPagedCharge = sizeof(CONTROL_AREA);
    Subsection = (PSUBSECTION)(ControlArea + 1);
 
    /* We only support single-subsection mappings */
    NonPagedCharge += Size;
    ASSERT(Subsection->NextSubsection == NULL);
 
    /* Create the actual section object, with enough space for the prototype PTEs */
    Status = ObCreateObject(PreviousMode,
                            MmSectionObjectType,
                            ObjectAttributes,
                            PreviousMode,
                            NULL,
                            sizeof(SECTION),
                            PagedCharge,
                            NonPagedCharge,
                            (PVOID*)&NewSection);
    if (!NT_SUCCESS(Status))
    {
        /* Check if this is a user-mode read-write non-image file mapping */
        if (!(FileObject) &&
            (SectionPageProtection & (PAGE_READWRITE | PAGE_EXECUTE_READWRITE)) &&
            !(ControlArea->u.Flags.Image) &&
            (ControlArea->FilePointer))
        {
            /* Remove a reference and check the flag */
            ASSERT(Section.u.Flags.UserWritable == 1);
            InterlockedDecrement((volatile LONG*)&ControlArea->WritableUserReferences);
        }
 
        /* Check if a user reference was added */
        if (UserRefIncremented)
        {
            /* Acquire the PFN lock while we change counters */
            OldIrql = MiAcquirePfnLock();
 
            /* Decrement the accounting counters */
            ControlArea->NumberOfSectionReferences--;
            ASSERT((LONG)ControlArea->NumberOfUserReferences > 0);
            ControlArea->NumberOfUserReferences--;
 
            /* Check if we should destroy the CA and release the lock */
            MiCheckControlArea(ControlArea, OldIrql);
        }
 
        /* Return the failure code */
        return Status;
    }
 
    /* NOTE: Past this point, all failures will be handled by Ob upon ref->0 */
 
    /* Now copy the local section object from the stack into this new object */
    RtlCopyMemory(NewSection, &Section, sizeof(SECTION));
    NewSection->Address.StartingVpn = 0;
 
    /* For now, only user calls are supported */
    ASSERT(KernelCall == FALSE);
    NewSection->u.Flags.UserReference = TRUE;
 
    /* Is this a "based" allocation, in which all mappings are identical? */
    if (AllocationAttributes & SEC_BASED)
    {
        /* Lock the VAD tree during the search */
        KeAcquireGuardedMutex(&MmSectionBasedMutex);
 
        /* Is it a brand new ControArea ? */
        if (ControlArea->u.Flags.BeingCreated == 1)
        {
            ASSERT(ControlArea->u.Flags.Based == 1);
            /* Then we must find a global address, top-down */
            Status = MiFindEmptyAddressRangeDownBasedTree((SIZE_T)ControlArea->Segment->SizeOfSegment,
                                                          (ULONG_PTR)MmHighSectionBase,
                                                          _64K,
                                                          &MmSectionBasedRoot,
                                                          (ULONG_PTR*)&ControlArea->Segment->BasedAddress);
 
            if (!NT_SUCCESS(Status))
            {
                /* No way to find a valid range. */
                KeReleaseGuardedMutex(&MmSectionBasedMutex);
                ControlArea->u.Flags.Based = 0;
                NewSection->u.Flags.Based = 0;
                ObDereferenceObject(NewSection);
                return Status;
            }
 
            /* Compute the ending address and insert it into the VAD tree */
            NewSection->Address.StartingVpn = (ULONG_PTR)ControlArea->Segment->BasedAddress;
            NewSection->Address.EndingVpn = NewSection->Address.StartingVpn + NewSection->SizeOfSection.LowPart - 1;
            MiInsertBasedSection(NewSection);
        }
        else
        {
            /* 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 !*/
            ASSERT(FALSE);
        }
 
        KeReleaseGuardedMutex(&MmSectionBasedMutex);
    }
 
    /* The control area is not being created anymore */
    if (ControlArea->u.Flags.BeingCreated == 1)
    {
        /* Acquire the PFN lock while we set control area flags */
        OldIrql = MiAcquirePfnLock();
 
        /* Take off the being created flag, and then release the lock */
        ControlArea->u.Flags.BeingCreated = 0;
        NewSection->u.Flags.BeingCreated = 0;
 
        MiReleasePfnLock(OldIrql);
    }
 
    /* Migrate the attribute into a flag */
    if (AllocationAttributes & SEC_NO_CHANGE) NewSection->u.Flags.NoChange = TRUE;
 
    /* If R/W access is not requested, this might eventually become a CoW mapping */
    if (!(SectionPageProtection & (PAGE_READWRITE | PAGE_EXECUTE_READWRITE)))
    {
        NewSection->u.Flags.CopyOnWrite = TRUE;
    }
 
    /* Write down if this was a kernel call */
    ControlArea->u.Flags.WasPurged |= KernelCall;
    ASSERT(ControlArea->u.Flags.WasPurged == FALSE);
 
    /* Make sure the segment and the section are the same size, or the section is smaller */
    ASSERT((ULONG64)NewSection->SizeOfSection.QuadPart <= NewSection->Segment->SizeOfSegment);
 
    /* Return the object and the creation status */
    *SectionObject = (PVOID)NewSection;
    return Status;
}

Referenced by MmCreateSection().

◆ MmDisableModifiedWriteOfSection()

BOOLEAN NTAPI MmDisableModifiedWriteOfSection ( IN PSECTION_OBJECT_POINTERS SectionObjectPointer )

Definition at line 2666 of file section.c.

{
   UNIMPLEMENTED;
   return FALSE;
}

◆ MmDoesFileHaveUserWritableReferences()

ULONG NTAPI MmDoesFileHaveUserWritableReferences ( IN PSECTION_OBJECT_POINTERS SectionPointer )

Definition at line 2987 of file section.c.

{
    UNIMPLEMENTED_ONCE;
    return 0;
}

Referenced by FatCheckShareAccess().

◆ MmForceSectionClosed()

BOOLEAN NTAPI MmForceSectionClosed	(	IN PSECTION_OBJECT_POINTERS	SectionObjectPointer,
		IN BOOLEAN	DelayClose
	)

Definition at line 2677 of file section.c.

{
   UNIMPLEMENTED;
   return FALSE;
}

Referenced by RxPurgeFcbInSystemCache(), and RxPurgeNetFcb().

◆ MmGetFileNameForAddress()

NTSTATUS NTAPI MmGetFileNameForAddress	(	IN PVOID	Address,
		OUT PUNICODE_STRING	ModuleName
	)

Definition at line 1691 of file section.c.

{
    POBJECT_NAME_INFORMATION ModuleNameInformation;
    PVOID AddressSpace;
    NTSTATUS Status;
    PMMVAD Vad;
    PFILE_OBJECT FileObject = NULL;
 
    /* Lock address space */
    AddressSpace = MmGetCurrentAddressSpace();
    MmLockAddressSpace(AddressSpace);
 
    /* Get the VAD */
    Vad = MiLocateAddress(Address);
    if (Vad == NULL)
    {
        /* Fail, the address does not exist */
        DPRINT1("No VAD at address %p\n", Address);
        MmUnlockAddressSpace(AddressSpace);
        return STATUS_INVALID_ADDRESS;
    }
 
    /* Get the file object pointer for the VAD */
    FileObject = MiGetFileObjectForVad(Vad);
    if (FileObject == NULL)
    {
        DPRINT1("Failed to get file object for Address %p\n", Address);
        MmUnlockAddressSpace(AddressSpace);
        return STATUS_SECTION_NOT_IMAGE;
    }
 
    /* Reference the file object */
    ObReferenceObject(FileObject);
 
    /* Unlock address space */
    MmUnlockAddressSpace(AddressSpace);
 
    /* Get the filename of the file object */
    Status = MmGetFileNameForFileObject(FileObject, &ModuleNameInformation);
 
    /* Dereference the file object */
    ObDereferenceObject(FileObject);
 
    /* Check if we were able to get the file object name */
    if (NT_SUCCESS(Status))
    {
        /* Init modulename */
        if (!RtlCreateUnicodeString(ModuleName, ModuleNameInformation->Name.Buffer))
            Status = STATUS_INSUFFICIENT_RESOURCES;
 
        /* Free temp taged buffer from MmGetFileNameForFileObject() */
        ExFreePoolWithTag(ModuleNameInformation, TAG_MM);
 
        DPRINT("Found ModuleName %wZ by address %p\n", ModuleName, Address);
    }
 
   /* Return status */
   return Status;
}

Referenced by DbgkpPostFakeModuleMessages(), and MiQueryMemorySectionName().

◆ MmGetFileNameForFileObject()

static NTSTATUS MmGetFileNameForFileObject	(	IN PFILE_OBJECT	FileObject,
		OUT POBJECT_NAME_INFORMATION *	ModuleName
	)

static

Definition at line 1638 of file section.c.

{
    POBJECT_NAME_INFORMATION ObjectNameInfo;
    NTSTATUS Status;
    ULONG ReturnLength;
 
    /* Allocate memory for our structure */
    ObjectNameInfo = ExAllocatePoolWithTag(PagedPool, 1024, TAG_MM);
    if (!ObjectNameInfo) return STATUS_NO_MEMORY;
 
    /* Query the name */
    Status = ObQueryNameString(FileObject,
                               ObjectNameInfo,
                               1024,
                               &ReturnLength);
    if (!NT_SUCCESS(Status))
    {
        /* Failed, free memory */
        DPRINT1("Name query failed\n");
        ExFreePoolWithTag(ObjectNameInfo, TAG_MM);
        *ModuleName = NULL;
        return Status;
    }
 
    /* Success */
    *ModuleName = ObjectNameInfo;
    return STATUS_SUCCESS;
}

Referenced by MmGetFileNameForAddress(), and MmGetFileNameForSection().

◆ MmGetFileNameForSection()

NTSTATUS NTAPI MmGetFileNameForSection	(	IN PVOID	Section,
		OUT POBJECT_NAME_INFORMATION *	ModuleName
	)

Definition at line 1670 of file section.c.

{
    PFILE_OBJECT FileObject;
    PSECTION SectionObject = Section;
 
    /* Make sure it's an image section */
    if (SectionObject->u.Flags.Image == 0)
    {
        /* It's not, fail */
        DPRINT1("Not an image section\n");
        return STATUS_SECTION_NOT_IMAGE;
    }
 
    /* Get the file object */
    FileObject = MmGetFileObjectForSection(Section);
    return MmGetFileNameForFileObject(FileObject, ModuleName);
}

Referenced by DbgkCreateThread(), and DbgkpSectionToFileHandle().

◆ MmGetFileObjectForSection()

PFILE_OBJECT NTAPI MmGetFileObjectForSection ( IN PVOID SectionObject )

Definition at line 1540 of file section.c.

{
    PSECTION Section = SectionObject;
    ASSERT(KeGetCurrentIrql() == PASSIVE_LEVEL);
    ASSERT(SectionObject != NULL);
 
    /* Check if it's an ARM3, or ReactOS section */
    if (MiIsRosSectionObject(SectionObject) == FALSE)
    {
        /* Return the file pointer stored in the control area */
        return Section->Segment->ControlArea->FilePointer;
    }
 
    /* Return the file object */
    return ((PMM_SECTION_SEGMENT)Section->Segment)->FileObject;
}

Referenced by CcGetFileObjectFromBcb(), CcGetFileObjectFromSectionPtrs(), CcShutdownSystem(), MmGetFileNameForSection(), MmInitializeProcessAddressSpace(), and PsReferenceProcessFilePointer().

◆ MmGetImageInformation()

VOID NTAPI MmGetImageInformation ( OUT PSECTION_IMAGE_INFORMATION ImageInformation )

Definition at line 1617 of file section.c.

{
    PSECTION SectionObject;
 
    /* Get the section object of this process*/
    SectionObject = PsGetCurrentProcess()->SectionObject;
    ASSERT(SectionObject != NULL);
    ASSERT(MiIsRosSectionObject(SectionObject) == TRUE);
 
    if (SectionObject->u.Flags.Image == 0)
    {
        RtlZeroMemory(ImageInformation, sizeof(*ImageInformation));
        return;
    }
 
    /* Return the image information */
    *ImageInformation = ((PMM_IMAGE_SECTION_OBJECT)SectionObject->Segment)->ImageInformation;
}

Referenced by NtQueryInformationProcess().

◆ MmMapViewInSessionSpace()

NTSTATUS NTAPI MmMapViewInSessionSpace	(	IN PVOID	Section,
		OUT PVOID *	MappedBase,
		IN OUT PSIZE_T	ViewSize
	)

Definition at line 2689 of file section.c.

{
    PAGED_CODE();
    LARGE_INTEGER SectionOffset;
 
    // HACK
    if (MiIsRosSectionObject(Section))
    {
        return MmMapViewInSystemSpace(Section, MappedBase, ViewSize);
    }
 
    /* Process must be in a session */
    if (PsGetCurrentProcess()->ProcessInSession == FALSE)
    {
        DPRINT1("Process is not in session\n");
        return STATUS_NOT_MAPPED_VIEW;
    }
 
    /* Use the system space API, but with the session view instead */
    ASSERT(MmIsAddressValid(MmSessionSpace) == TRUE);
    SectionOffset.QuadPart = 0;
    return MiMapViewInSystemSpace(Section,
                                  &MmSessionSpace->Session,
                                  MappedBase,
                                  ViewSize,
                                  &SectionOffset);
}

Referenced by _Success_(), InitGdiHandleTable(), and UserCreateHeap().

◆ MmMapViewOfArm3Section()

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
	)

Definition at line 2531 of file section.c.

{
    KAPC_STATE ApcState;
    BOOLEAN Attached = FALSE;
    PSECTION Section;
    PCONTROL_AREA ControlArea;
    ULONG ProtectionMask;
    NTSTATUS Status;
    ULONG64 CalculatedViewSize;
    PAGED_CODE();
 
    /* Get the segment and control area */
    Section = (PSECTION)SectionObject;
    ControlArea = Section->Segment->ControlArea;
 
    /* These flags/states are not yet supported by ARM3 */
    ASSERT(Section->u.Flags.Image == 0);
    ASSERT(Section->u.Flags.NoCache == 0);
    ASSERT(Section->u.Flags.WriteCombined == 0);
    ASSERT(ControlArea->u.Flags.PhysicalMemory == 0);
 
    /* FIXME */
    if ((AllocationType & MEM_RESERVE) != 0)
    {
        DPRINT1("MmMapViewOfArm3Section called with MEM_RESERVE, this is not implemented yet!!!\n");
        return STATUS_NOT_IMPLEMENTED;
    }
 
    /* Check if the mapping protection is compatible with the create */
    if (!MiIsProtectionCompatible(Section->InitialPageProtection, Protect))
    {
        DPRINT1("Mapping protection is incompatible\n");
        return STATUS_SECTION_PROTECTION;
    }
 
    /* Check if the offset and size would cause an overflow */
    if (((ULONG64)SectionOffset->QuadPart + *ViewSize) <
         (ULONG64)SectionOffset->QuadPart)
    {
        DPRINT1("Section offset overflows\n");
        return STATUS_INVALID_VIEW_SIZE;
    }
 
    /* Check if the offset and size are bigger than the section itself */
    if (((ULONG64)SectionOffset->QuadPart + *ViewSize) >
         (ULONG64)Section->SizeOfSection.QuadPart)
    {
        DPRINT1("Section offset is larger than section\n");
        return STATUS_INVALID_VIEW_SIZE;
    }
 
    /* Check if the caller did not specify a view size */
    if (!(*ViewSize))
    {
        /* Compute it for the caller */
        CalculatedViewSize = Section->SizeOfSection.QuadPart -
                             SectionOffset->QuadPart;
 
        /* Check if it's larger than 4GB or overflows into kernel-mode */
        if (!NT_SUCCESS(RtlULongLongToSIZET(CalculatedViewSize, ViewSize)) ||
            (((ULONG_PTR)MM_HIGHEST_VAD_ADDRESS - (ULONG_PTR)*BaseAddress) < CalculatedViewSize))
        {
            DPRINT1("Section view won't fit\n");
            return STATUS_INVALID_VIEW_SIZE;
        }
    }
 
    /* Check if the commit size is larger than the view size */
    if (CommitSize > *ViewSize)
    {
        DPRINT1("Attempting to commit more than the view itself\n");
        return STATUS_INVALID_PARAMETER_5;
    }
 
    /* Check if the view size is larger than the section */
    if (*ViewSize > (ULONG64)Section->SizeOfSection.QuadPart)
    {
        DPRINT1("The view is larger than the section\n");
        return STATUS_INVALID_VIEW_SIZE;
    }
 
    /* Compute and validate the protection mask */
    ProtectionMask = MiMakeProtectionMask(Protect);
    if (ProtectionMask == MM_INVALID_PROTECTION)
    {
        DPRINT1("The protection is invalid\n");
        return STATUS_INVALID_PAGE_PROTECTION;
    }
 
    /* We only handle pagefile-backed sections, which cannot be writecombined */
    if (Protect & PAGE_WRITECOMBINE)
    {
        DPRINT1("Cannot write combine a pagefile-backed section\n");
        return STATUS_INVALID_PARAMETER_10;
    }
 
    /* Start by attaching to the current process if needed */
    if (PsGetCurrentProcess() != Process)
    {
        KeStackAttachProcess(&Process->Pcb, &ApcState);
        Attached = TRUE;
    }
 
    /* Do the actual mapping */
    Status = MiMapViewOfDataSection(ControlArea,
                                    Process,
                                    BaseAddress,
                                    SectionOffset,
                                    ViewSize,
                                    Section,
                                    InheritDisposition,
                                    ProtectionMask,
                                    CommitSize,
                                    ZeroBits,
                                    AllocationType);
 
    /* Detach if needed, then return status */
    if (Attached) KeUnstackDetachProcess(&ApcState);
    return Status;
}

Referenced by MmMapViewOfSection().

◆ MmUnmapViewInSessionSpace()

NTSTATUS NTAPI MmUnmapViewInSessionSpace ( IN PVOID MappedBase )

Definition at line 2724 of file section.c.

{
    PAGED_CODE();
 
    // HACK
    if (!MI_IS_SESSION_ADDRESS(MappedBase))
    {
        return MmUnmapViewInSystemSpace(MappedBase);
    }
 
    /* Process must be in a session */
    if (PsGetCurrentProcess()->ProcessInSession == FALSE)
    {
        DPRINT1("Proess is not in session\n");
        return STATUS_NOT_MAPPED_VIEW;
    }
 
    /* Use the system space API, but with the session view instead */
    ASSERT(MmIsAddressValid(MmSessionSpace) == TRUE);
    return MiUnmapViewInSystemSpace(&MmSessionSpace->Session,
                                    MappedBase);
}

Referenced by EngFreeSectionMem(), and IntFreeDesktopHeap().

◆ MmUnmapViewInSystemSpace()

NTSTATUS NTAPI MmUnmapViewInSystemSpace ( IN PVOID MappedBase )

Definition at line 2763 of file section.c.

{
    PMEMORY_AREA MemoryArea;
    PAGED_CODE();
 
    /* Was this mapped by RosMm? */
    MmLockAddressSpace(MmGetKernelAddressSpace());
    MemoryArea = MmLocateMemoryAreaByAddress(MmGetKernelAddressSpace(), MappedBase);
    if ((MemoryArea) && (MemoryArea->Type != MEMORY_AREA_OWNED_BY_ARM3))
    {
        NTSTATUS Status = MiRosUnmapViewInSystemSpace(MappedBase);
        MmUnlockAddressSpace(MmGetKernelAddressSpace());
        return Status;
    }
    MmUnlockAddressSpace(MmGetKernelAddressSpace());
 
    /* It was not, call the ARM3 routine */
    return MiUnmapViewInSystemSpace(&MmSession, MappedBase);
}

Referenced by CcRosInternalFreeVacb(), EngFreeModule(), MmUnmapViewInSessionSpace(), and SharedMem_Release().

◆ MmUnmapViewOfSection()

NTSTATUS NTAPI MmUnmapViewOfSection	(	IN PEPROCESS	Process,
		IN PVOID	BaseAddress
	)

Definition at line 2752 of file section.c.

{
    return MiUnmapViewOfSection(Process, BaseAddress, 0);
}

Referenced by _Function_class_(), _Success_(), EngUnmapSectionView(), IntMapDesktopView(), IntUnmapDesktopView(), IntUserHeapCreate(), LpcpDeletePort(), MiLoadImageSection(), and UnmapGlobalUserHeap().

◆ NtAreMappedFilesTheSame()

NTSTATUS NTAPI NtAreMappedFilesTheSame	(	IN PVOID	File1MappedAsAnImage,
		IN PVOID	File2MappedAsFile
	)

Definition at line 2997 of file section.c.

{
    PVOID AddressSpace;
    PMMVAD Vad1, Vad2;
    PFILE_OBJECT FileObject1, FileObject2;
    NTSTATUS Status;
 
    /* Lock address space */
    AddressSpace = MmGetCurrentAddressSpace();
    MmLockAddressSpace(AddressSpace);
 
    /* Get the VAD for Address 1 */
    Vad1 = MiLocateAddress(File1MappedAsAnImage);
    if (Vad1 == NULL)
    {
        /* Fail, the address does not exist */
        DPRINT1("No VAD at address 1 %p\n", File1MappedAsAnImage);
        Status = STATUS_INVALID_ADDRESS;
        goto Exit;
    }
 
    /* Get the VAD for Address 2 */
    Vad2 = MiLocateAddress(File2MappedAsFile);
    if (Vad2 == NULL)
    {
        /* Fail, the address does not exist */
        DPRINT1("No VAD at address 2 %p\n", File2MappedAsFile);
        Status = STATUS_INVALID_ADDRESS;
        goto Exit;
    }
 
    /* Get the file object pointer for VAD 1 */
    FileObject1 = MiGetFileObjectForVad(Vad1);
    if (FileObject1 == NULL)
    {
        DPRINT1("Failed to get file object for Address 1 %p\n", File1MappedAsAnImage);
        Status = STATUS_CONFLICTING_ADDRESSES;
        goto Exit;
    }
 
    /* Get the file object pointer for VAD 2 */
    FileObject2 = MiGetFileObjectForVad(Vad2);
    if (FileObject2 == NULL)
    {
        DPRINT1("Failed to get file object for Address 2 %p\n", File2MappedAsFile);
        Status = STATUS_CONFLICTING_ADDRESSES;
        goto Exit;
    }
 
    /* Make sure Vad1 is an image mapping */
    if (Vad1->u.VadFlags.VadType != VadImageMap)
    {
        DPRINT1("Address 1 (%p) is not an image mapping\n", File1MappedAsAnImage);
        Status = STATUS_NOT_SAME_DEVICE;
        goto Exit;
    }
 
    /* SectionObjectPointer is equal if the files are equal */
    if (FileObject1->SectionObjectPointer == FileObject2->SectionObjectPointer)
    {
        Status = STATUS_SUCCESS;
    }
    else
    {
        Status = STATUS_NOT_SAME_DEVICE;
    }
 
Exit:
    /* Unlock address space */
    MmUnlockAddressSpace(AddressSpace);
    return Status;
}

◆ NtCreateSection()

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
	)

Definition at line 3076 of file section.c.

{
    LARGE_INTEGER SafeMaximumSize;
    PVOID SectionObject;
    HANDLE Handle;
    KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
    NTSTATUS Status;
    PAGED_CODE();
 
    /* Check for non-existing flags */
    if ((AllocationAttributes & ~(SEC_COMMIT | SEC_RESERVE | SEC_BASED |
                                  SEC_LARGE_PAGES | SEC_IMAGE | SEC_NOCACHE |
                                  SEC_NO_CHANGE)))
    {
        if (!(AllocationAttributes & 1))
        {
            DPRINT1("Bogus allocation attribute: %lx\n", AllocationAttributes);
            return STATUS_INVALID_PARAMETER_6;
        }
    }
 
    /* Check for no allocation type */
    if (!(AllocationAttributes & (SEC_COMMIT | SEC_RESERVE | SEC_IMAGE)))
    {
        DPRINT1("Missing allocation type in allocation attributes\n");
        return STATUS_INVALID_PARAMETER_6;
    }
 
    /* Check for image allocation with invalid attributes */
    if ((AllocationAttributes & SEC_IMAGE) &&
        (AllocationAttributes & (SEC_COMMIT | SEC_RESERVE | SEC_LARGE_PAGES |
                                 SEC_NOCACHE | SEC_NO_CHANGE)))
    {
        DPRINT1("Image allocation with invalid attributes\n");
        return STATUS_INVALID_PARAMETER_6;
    }
 
    /* Check for allocation type is both commit and reserve */
    if ((AllocationAttributes & SEC_COMMIT) && (AllocationAttributes & SEC_RESERVE))
    {
        DPRINT1("Commit and reserve in the same time\n");
        return STATUS_INVALID_PARAMETER_6;
    }
 
    /* Now check for valid protection */
    if ((SectionPageProtection & PAGE_NOCACHE) ||
        (SectionPageProtection & PAGE_WRITECOMBINE) ||
        (SectionPageProtection & PAGE_GUARD) ||
        (SectionPageProtection & PAGE_NOACCESS))
    {
        DPRINT1("Sections don't support these protections\n");
        return STATUS_INVALID_PAGE_PROTECTION;
    }
 
    /* Use a maximum size of zero, if none was specified */
    SafeMaximumSize.QuadPart = 0;
 
    /* Check for user-mode caller */
    if (PreviousMode != KernelMode)
    {
        /* Enter SEH */
        _SEH2_TRY
        {
            /* Safely check user-mode parameters */
            if (MaximumSize) SafeMaximumSize = ProbeForReadLargeInteger(MaximumSize);
            MaximumSize = &SafeMaximumSize;
            ProbeForWriteHandle(SectionHandle);
        }
        _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
        {
            /* Return the exception code */
            _SEH2_YIELD(return _SEH2_GetExceptionCode());
        }
        _SEH2_END;
    }
    else if (!MaximumSize) MaximumSize = &SafeMaximumSize;
 
    /* Check that MaximumSize is valid if backed by paging file */
    if ((!FileHandle) && (!MaximumSize->QuadPart))
        return STATUS_INVALID_PARAMETER_4;
 
    /* Create the section */
    Status = MmCreateSection(&SectionObject,
                             DesiredAccess,
                             ObjectAttributes,
                             MaximumSize,
                             SectionPageProtection,
                             AllocationAttributes,
                             FileHandle,
                             NULL);
    if (!NT_SUCCESS(Status)) return Status;
 
    /* FIXME: Should zero last page for a file mapping */
 
    /* Now insert the object */
    Status = ObInsertObject(SectionObject,
                            NULL,
                            DesiredAccess,
                            0,
                            NULL,
                            &Handle);
    if (NT_SUCCESS(Status))
    {
        /* Enter SEH */
        _SEH2_TRY
        {
            /* Return the handle safely */
            *SectionHandle = Handle;
        }
        _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
        {
            /* Nothing here */
        }
        _SEH2_END;
    }
 
    /* Return the status */
    return Status;
}

Referenced by BasepMapFile(), CabinetExtractFile(), CabinetOpen(), CON_API(), CreateFileMappingW(), CreateProcessInternalW(), CreateSection(), CSR_API(), CsrpConnectToServer(), CsrSrvCreateSharedSection(), get_binary_type(), get_manifest_in_manifest_file(), get_manifest_in_pe_file(), GRAPHICS_BUFFER_Initialize(), GuiConsoleShowConsoleProperties(), InitFunctionPtrs(), IntGetCodePageEntry(), LdrpCheckForLoadedDll(), LdrpCreateDllSection(), LdrVerifyImageMatchesChecksum(), MapFile(), SdbpOpenMemMappedFile(), SetupCopyFile(), SmpInitializeKnownDllsInternal(), START_TEST(), Test_BasedSection(), Test_EmptyFile(), Test_ImageSection(), Test_ImageSection2(), Test_PageFileSection(), Test_RawSize(), Test_SectionContents(), Test_Truncate(), and TH32CreateSnapshotSectionInitialize().

◆ NtExtendSection()

NTSTATUS NTAPI NtExtendSection	(	IN HANDLE	SectionHandle,
		IN OUT PLARGE_INTEGER	NewMaximumSize
	)

Definition at line 3516 of file section.c.

{
    LARGE_INTEGER SafeNewMaximumSize;
    PSECTION Section;
    NTSTATUS Status;
    KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
 
    /* Check for user-mode parameters */
    if (PreviousMode != KernelMode)
    {
        /* Enter SEH */
        _SEH2_TRY
        {
            /* Probe and capture the maximum size, it's both read and write */
            ProbeForWriteLargeInteger(NewMaximumSize);
            SafeNewMaximumSize = *NewMaximumSize;
        }
        _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
        {
            /* Return the exception code */
            _SEH2_YIELD(return _SEH2_GetExceptionCode());
        }
        _SEH2_END;
    }
    else
    {
        /* Just read the size directly */
        SafeNewMaximumSize = *NewMaximumSize;
    }
 
    /* Reference the section */
    Status = ObReferenceObjectByHandle(SectionHandle,
                                       SECTION_EXTEND_SIZE,
                                       MmSectionObjectType,
                                       PreviousMode,
                                       (PVOID*)&Section,
                                       NULL);
    if (!NT_SUCCESS(Status)) return Status;
 
    Status = MmExtendSection(Section, &SafeNewMaximumSize);
 
    /* Dereference the section */
    ObDereferenceObject(Section);
 
    if (NT_SUCCESS(Status))
    {
        _SEH2_TRY
        {
            /* Write back the new size */
            *NewMaximumSize = SafeNewMaximumSize;
        }
        _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
        {
            Status = _SEH2_GetExceptionCode();
        }
        _SEH2_END;
    }
 
    /* Return the status */
    return STATUS_NOT_IMPLEMENTED;
}

◆ NtMapViewOfSection()

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
	)

Definition at line 3257 of file section.c.

{
    PVOID SafeBaseAddress;
    LARGE_INTEGER SafeSectionOffset;
    SIZE_T SafeViewSize;
    PSECTION Section;
    PEPROCESS Process;
    NTSTATUS Status;
    ACCESS_MASK DesiredAccess;
    ULONG ProtectionMask;
    KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
#if defined(_M_IX86) || defined(_M_AMD64)
    static const ULONG ValidAllocationType = (MEM_TOP_DOWN | MEM_LARGE_PAGES |
            MEM_DOS_LIM | SEC_NO_CHANGE | MEM_RESERVE);
#else
    static const ULONG ValidAllocationType = (MEM_TOP_DOWN | MEM_LARGE_PAGES |
            SEC_NO_CHANGE | MEM_RESERVE);
#endif
 
    /* Check for invalid inherit disposition */
    if ((InheritDisposition > ViewUnmap) || (InheritDisposition < ViewShare))
    {
        DPRINT1("Invalid inherit disposition\n");
        return STATUS_INVALID_PARAMETER_8;
    }
 
    /* Allow only valid allocation types */
    if (AllocationType & ~ValidAllocationType)
    {
        DPRINT1("Invalid allocation type\n");
        return STATUS_INVALID_PARAMETER_9;
    }
 
    /* Convert the protection mask, and validate it */
    ProtectionMask = MiMakeProtectionMask(Protect);
    if (ProtectionMask == MM_INVALID_PROTECTION)
    {
        DPRINT1("Invalid page protection\n");
        return STATUS_INVALID_PAGE_PROTECTION;
    }
 
    /* Now convert the protection mask into desired section access mask */
    DesiredAccess = MmMakeSectionAccess[ProtectionMask & 0x7];
 
    /* Assume no section offset */
    SafeSectionOffset.QuadPart = 0;
 
    /* Enter SEH */
    _SEH2_TRY
    {
        /* Check for unsafe parameters */
        if (PreviousMode != KernelMode)
        {
            /* Probe the parameters */
            ProbeForWritePointer(BaseAddress);
            ProbeForWriteSize_t(ViewSize);
        }
 
        /* Check if a section offset was given */
        if (SectionOffset)
        {
            /* Check for unsafe parameters and capture section offset */
            if (PreviousMode != KernelMode) ProbeForWriteLargeInteger(SectionOffset);
            SafeSectionOffset = *SectionOffset;
        }
 
        /* Capture the other parameters */
        SafeBaseAddress = *BaseAddress;
        SafeViewSize = *ViewSize;
    }
    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
    {
        /* Return the exception code */
        _SEH2_YIELD(return _SEH2_GetExceptionCode());
    }
    _SEH2_END;
 
    /* Check for kernel-mode address */
    if (SafeBaseAddress > MM_HIGHEST_VAD_ADDRESS)
    {
        DPRINT1("Kernel base not allowed\n");
        return STATUS_INVALID_PARAMETER_3;
    }
 
    /* Check for range entering kernel-mode */
    if (((ULONG_PTR)MM_HIGHEST_VAD_ADDRESS - (ULONG_PTR)SafeBaseAddress) < SafeViewSize)
    {
        DPRINT1("Overflowing into kernel base not allowed\n");
        return STATUS_INVALID_PARAMETER_3;
    }
 
    /* Check for invalid zero bits */
    if (ZeroBits)
    {
        if (ZeroBits > MI_MAX_ZERO_BITS)
        {
            DPRINT1("Invalid zero bits\n");
            return STATUS_INVALID_PARAMETER_4;
        }
 
        if ((((ULONG_PTR)SafeBaseAddress << ZeroBits) >> ZeroBits) != (ULONG_PTR)SafeBaseAddress)
        {
            DPRINT1("Invalid zero bits\n");
            return STATUS_INVALID_PARAMETER_4;
        }
 
        if (((((ULONG_PTR)SafeBaseAddress + SafeViewSize) << ZeroBits) >> ZeroBits) != ((ULONG_PTR)SafeBaseAddress + SafeViewSize))
        {
            DPRINT1("Invalid zero bits\n");
            return STATUS_INVALID_PARAMETER_4;
        }
    }
 
    /* Reference the process */
    Status = ObReferenceObjectByHandle(ProcessHandle,
                                       PROCESS_VM_OPERATION,
                                       PsProcessType,
                                       PreviousMode,
                                       (PVOID*)&Process,
                                       NULL);
    if (!NT_SUCCESS(Status)) return Status;
 
    /* Reference the section */
    Status = ObReferenceObjectByHandle(SectionHandle,
                                       DesiredAccess,
                                       MmSectionObjectType,
                                       PreviousMode,
                                       (PVOID*)&Section,
                                       NULL);
    if (!NT_SUCCESS(Status))
    {
        ObDereferenceObject(Process);
        return Status;
    }
 
    if (Section->u.Flags.PhysicalMemory)
    {
        if (PreviousMode == UserMode &&
            SafeSectionOffset.QuadPart + SafeViewSize > MmHighestPhysicalPage << PAGE_SHIFT)
        {
            DPRINT1("Denying map past highest physical page.\n");
            ObDereferenceObject(Section);
            ObDereferenceObject(Process);
            return STATUS_INVALID_PARAMETER_6;
        }
    }
    else if (!(AllocationType & MEM_DOS_LIM))
    {
        /* Check for non-allocation-granularity-aligned BaseAddress */
        if (SafeBaseAddress != ALIGN_DOWN_POINTER_BY(SafeBaseAddress, MM_VIRTMEM_GRANULARITY))
        {
            DPRINT("BaseAddress is not at 64-kilobyte address boundary.\n");
            ObDereferenceObject(Section);
            ObDereferenceObject(Process);
            return STATUS_MAPPED_ALIGNMENT;
        }
 
        /* Do the same for the section offset */
        if (SafeSectionOffset.LowPart != ALIGN_DOWN_BY(SafeSectionOffset.LowPart, MM_VIRTMEM_GRANULARITY))
        {
            DPRINT("SectionOffset is not at 64-kilobyte address boundary.\n");
            ObDereferenceObject(Section);
            ObDereferenceObject(Process);
            return STATUS_MAPPED_ALIGNMENT;
        }
    }
 
    /* Now do the actual mapping */
    Status = MmMapViewOfSection(Section,
                                Process,
                                &SafeBaseAddress,
                                ZeroBits,
                                CommitSize,
                                &SafeSectionOffset,
                                &SafeViewSize,
                                InheritDisposition,
                                AllocationType,
                                Protect);
 
    /* Return data only on success */
    if (NT_SUCCESS(Status))
    {
        /* Check if this is an image for the current process */
        if ((Section->u.Flags.Image) &&
            (Process == PsGetCurrentProcess()) &&
            (Status != STATUS_IMAGE_NOT_AT_BASE))
        {
            /* Notify the debugger */
            DbgkMapViewOfSection(Section,
                                 SafeBaseAddress,
                                 SafeSectionOffset.LowPart,
                                 SafeViewSize);
        }
 
        /* Enter SEH */
        _SEH2_TRY
        {
            /* Return parameters to user */
            *BaseAddress = SafeBaseAddress;
            *ViewSize = SafeViewSize;
            if (SectionOffset) *SectionOffset = SafeSectionOffset;
        }
        _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
        {
            /* Nothing to do */
        }
        _SEH2_END;
    }
 
    /* Dereference all objects and return status */
    ObDereferenceObject(Section);
    ObDereferenceObject(Process);
    return Status;
}

Referenced by BasepLoadLibraryAsDatafile(), CabinetExtractFile(), CabinetOpen(), CON_API(), CsrSrvAttachSharedSection(), CsrSrvCreateSharedSection(), get_manifest_in_manifest_file(), get_manifest_in_pe_file(), GRAPHICS_BUFFER_Initialize(), GuiApplyUserSettings(), GuiConsoleShowConsoleProperties(), Heap32ListFirst(), Heap32ListNext(), InitFunctionPtrs(), LdrpMapDll(), LdrVerifyImageMatchesChecksum(), MapFile(), MapViewOfFileEx(), Module32FirstW(), Module32NextW(), Process32FirstW(), Process32NextW(), SdbpOpenMemMappedFile(), SetupCopyFile(), START_TEST(), Test_BasedSection(), Test_ImageSection(), Test_ImageSection2(), Test_PageFileSection(), Test_RawSize(), Test_SectionContents(), Test_Truncate(), TestPhysicalMemorySection(), TH32CreateSnapshotSectionInitialize(), Thread32First(), and Thread32Next().

◆ NtOpenSection()

NTSTATUS NTAPI NtOpenSection	(	OUT PHANDLE	SectionHandle,
		IN ACCESS_MASK	DesiredAccess,
		IN POBJECT_ATTRIBUTES	ObjectAttributes
	)

Definition at line 3204 of file section.c.

{
    HANDLE Handle;
    NTSTATUS Status;
    KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
    PAGED_CODE();
 
    /* Check for user-mode caller */
    if (PreviousMode != KernelMode)
    {
        /* Enter SEH */
        _SEH2_TRY
        {
            /* Safely check user-mode parameters */
            ProbeForWriteHandle(SectionHandle);
        }
        _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
        {
            /* Return the exception code */
            _SEH2_YIELD(return _SEH2_GetExceptionCode());
        }
        _SEH2_END;
    }
 
    /* Try opening the object */
    Status = ObOpenObjectByName(ObjectAttributes,
                                MmSectionObjectType,
                                PreviousMode,
                                NULL,
                                DesiredAccess,
                                NULL,
                                &Handle);
 
    /* Enter SEH */
    _SEH2_TRY
    {
        /* Return the handle safely */
        *SectionHandle = Handle;
    }
    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
    {
        /* Nothing here */
    }
    _SEH2_END;
 
    /* Return the status */
    return Status;
}

Referenced by IntGetCodePageEntry(), LdrpCheckForKnownDll(), NtOpenObject(), and OpenFileMappingW().

◆ NtUnmapViewOfSection()

NTSTATUS NTAPI NtUnmapViewOfSection	(	IN HANDLE	ProcessHandle,
		IN PVOID	BaseAddress
	)

Definition at line 3483 of file section.c.

{
    PEPROCESS Process;
    NTSTATUS Status;
    KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
 
    /* Don't allowing mapping kernel views */
    if ((PreviousMode == UserMode) && (BaseAddress > MM_HIGHEST_USER_ADDRESS))
    {
        DPRINT1("Trying to unmap a kernel view\n");
        return STATUS_NOT_MAPPED_VIEW;
    }
 
    /* Reference the process */
    Status = ObReferenceObjectByHandle(ProcessHandle,
                                       PROCESS_VM_OPERATION,
                                       PsProcessType,
                                       PreviousMode,
                                       (PVOID*)&Process,
                                       NULL);
    if (!NT_SUCCESS(Status)) return Status;
 
    /* Unmap the view */
    Status = MiUnmapViewOfSection(Process, BaseAddress, 0);
 
    /* Dereference the process and return status */
    ObDereferenceObject(Process);
    return Status;
}

Referenced by BasepSxsCloseHandles(), CabinetExtractFile(), CloseCabinet(), CON_API(), CsrSrvCreateSharedSection(), FreeLibrary(), FreeLibraryAndExitThread(), get_manifest_in_manifest_file(), get_manifest_in_pe_file(), GRAPHICS_BUFFER_Destroy(), GRAPHICS_BUFFER_Initialize(), GuiApplyUserSettings(), GuiConsoleShowConsoleProperties(), Heap32ListFirst(), Heap32ListNext(), InitFunctionPtrs(), LdrpCheckForLoadedDll(), LdrpMapDll(), LdrUnloadDll(), LdrVerifyImageMatchesChecksum(), Module32FirstW(), Module32NextW(), Process32FirstW(), Process32NextW(), SdbpCloseMemMappedFile(), SetupCopyFile(), START_TEST(), Test_ImageSection(), Test_PageFileSection(), Test_RawSize(), Test_SectionContents(), Test_Truncate(), TH32CreateSnapshotSectionInitialize(), Thread32First(), Thread32Next(), UnMapFile(), and UnmapViewOfFile().

Variable Documentation

◆ MmCompatibleProtectionMask

ULONG MmCompatibleProtectionMask[8]

Initial value:

=
{
    PAGE_NOACCESS,
 
    PAGE_NOACCESS | PAGE_READONLY | PAGE_WRITECOPY,
 
    PAGE_NOACCESS | PAGE_EXECUTE,
 
    PAGE_NOACCESS | PAGE_READONLY | PAGE_WRITECOPY | PAGE_EXECUTE |
    PAGE_EXECUTE_READ,
 
    PAGE_NOACCESS | PAGE_READONLY | PAGE_WRITECOPY | PAGE_READWRITE,
 
    PAGE_NOACCESS | PAGE_READONLY | PAGE_WRITECOPY,
 
    PAGE_NOACCESS | PAGE_READONLY | PAGE_WRITECOPY | PAGE_READWRITE |
    PAGE_EXECUTE | PAGE_EXECUTE_READ | PAGE_EXECUTE_READWRITE |
    PAGE_EXECUTE_WRITECOPY,
 
    PAGE_NOACCESS | PAGE_READONLY | PAGE_WRITECOPY | PAGE_EXECUTE |
    PAGE_EXECUTE_READ | PAGE_EXECUTE_WRITECOPY
}

Definition at line 84 of file section.c.

Referenced by MiIsProtectionCompatible().

◆ MmHighSectionBase

PVOID MmHighSectionBase

Definition at line 111 of file section.c.

Referenced by MmArmInitSystem(), and MmCreateArm3Section().

◆ MmMakeFileAccess

ACCESS_MASK MmMakeFileAccess[8]

Initial value:

=
{
    FILE_READ_DATA,
    FILE_READ_DATA,
    FILE_EXECUTE,
    FILE_EXECUTE | FILE_READ_DATA,
    FILE_WRITE_DATA | FILE_READ_DATA,
    FILE_READ_DATA,
    FILE_EXECUTE | FILE_WRITE_DATA | FILE_READ_DATA,
    FILE_EXECUTE | FILE_READ_DATA
}

Definition at line 32 of file section.c.

Referenced by MmCreateArm3Section(), and MmCreateSection().

◆ MmMakeSectionAccess

ACCESS_MASK MmMakeSectionAccess[8]

Initial value:

=
{
    SECTION_MAP_READ,
    SECTION_MAP_READ,
    SECTION_MAP_EXECUTE,
    SECTION_MAP_EXECUTE | SECTION_MAP_READ,
    SECTION_MAP_WRITE,
    SECTION_MAP_READ,
    SECTION_MAP_EXECUTE | SECTION_MAP_WRITE,
    SECTION_MAP_EXECUTE | SECTION_MAP_READ
}

Definition at line 20 of file section.c.

Referenced by NtMapViewOfSection().

◆ MmSectionBasedMutex

KGUARDED_MUTEX MmSectionBasedMutex

Definition at line 110 of file section.c.

Referenced by MiDeleteARM3Section(), MmArmInitSystem(), and MmCreateArm3Section().

◆ MmSectionBasedRoot

MM_AVL_TABLE MmSectionBasedRoot

Definition at line 109 of file section.c.

Referenced by MiDeleteARM3Section(), MiFindEmptyAddressRangeDownBasedTree(), MiInsertBasedSection(), MmCreateArm3Section(), and MmInitSectionImplementation().

◆ MmSectionCommitMutex

KGUARDED_MUTEX MmSectionCommitMutex

Definition at line 108 of file section.c.

Referenced by MiMapViewOfDataSection(), MmArmInitSystem(), MmCommitSessionMappedView(), and NtAllocateVirtualMemory().

◆ MmSession

MMSESSION MmSession

Definition at line 107 of file section.c.

Referenced by MiInitializeSystemSpaceMap(), MiInsertInSystemSpace(), MiMapViewInSystemSpace(), MmMapViewInSystemSpaceEx(), and MmUnmapViewInSystemSpace().

◆ MmUserProtectionToMask1

CHAR MmUserProtectionToMask1[16]

Initial value:

=
{
    0,
    MM_NOACCESS,
    MM_READONLY,
    (CHAR)MM_INVALID_PROTECTION,
    MM_READWRITE,
    (CHAR)MM_INVALID_PROTECTION,
    (CHAR)MM_INVALID_PROTECTION,
    (CHAR)MM_INVALID_PROTECTION,
    MM_WRITECOPY,
    (CHAR)MM_INVALID_PROTECTION,
    (CHAR)MM_INVALID_PROTECTION,
    (CHAR)MM_INVALID_PROTECTION,
    (CHAR)MM_INVALID_PROTECTION,
    (CHAR)MM_INVALID_PROTECTION,
    (CHAR)MM_INVALID_PROTECTION,
    (CHAR)MM_INVALID_PROTECTION
}

Definition at line 44 of file section.c.

Referenced by MiMakeProtectionMask().

◆ MmUserProtectionToMask2

CHAR MmUserProtectionToMask2[16]

Initial value:

=
{
    0,
    MM_EXECUTE,
    MM_EXECUTE_READ,
    (CHAR)MM_INVALID_PROTECTION,
    MM_EXECUTE_READWRITE,
    (CHAR)MM_INVALID_PROTECTION,
    (CHAR)MM_INVALID_PROTECTION,
    (CHAR)MM_INVALID_PROTECTION,
    MM_EXECUTE_WRITECOPY,
    (CHAR)MM_INVALID_PROTECTION,
    (CHAR)MM_INVALID_PROTECTION,
    (CHAR)MM_INVALID_PROTECTION,
    (CHAR)MM_INVALID_PROTECTION,
    (CHAR)MM_INVALID_PROTECTION,
    (CHAR)MM_INVALID_PROTECTION,
    (CHAR)MM_INVALID_PROTECTION
}

Definition at line 64 of file section.c.

Referenced by MiMakeProtectionMask().

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

Macros

Functions

Variables

Macro Definition Documentation

◆ MODULE_INVOLVED_IN_ARM3

◆ NDEBUG

Function Documentation

◆ MiAddMappedPtes()

◆ MiCheckControlArea()

◆ MiCheckPurgeAndUpMapCount()

◆ MiCreateDataFileMap()

◆ MiCreatePagingFileMap()

◆ MiDeleteARM3Section()

◆ MiDereferenceControlArea()

◆ MiFillSystemPageDirectory()

◆ MiFlushTbAndCapture()

◆ MiGetFileObjectForVad()

◆ MiInitializeSystemSpaceMap()

◆ MiInsertInSystemSpace()

◆ MiIsProtectionCompatible()

◆ MiLocateSubsection()

◆ MiMakeProtectionMask()

◆ MiMapViewInSystemSpace()

◆ MiMapViewOfDataSection()

◆ MiQueryMemorySectionName()

◆ MiRemoveFromSystemSpace()

◆ MiRemoveMappedPtes()

◆ MiRemoveMappedView()

◆ MiSegmentDelete()

◆ MiSessionCommitPageTables()

◆ MiUnmapViewInSystemSpace()

◆ MiUnmapViewOfSection()

◆ MmCommitSessionMappedView()

◆ MmCreateArm3Section()

◆ MmDisableModifiedWriteOfSection()

◆ MmDoesFileHaveUserWritableReferences()

◆ MmForceSectionClosed()

◆ MmGetFileNameForAddress()

◆ MmGetFileNameForFileObject()

◆ MmGetFileNameForSection()

◆ MmGetFileObjectForSection()

◆ MmGetImageInformation()

◆ MmMapViewInSessionSpace()

◆ MmMapViewOfArm3Section()

◆ MmUnmapViewInSessionSpace()

◆ MmUnmapViewInSystemSpace()

◆ MmUnmapViewOfSection()

◆ NtAreMappedFilesTheSame()

◆ NtCreateSection()

◆ NtExtendSection()

◆ NtMapViewOfSection()

◆ NtOpenSection()

◆ NtUnmapViewOfSection()

Variable Documentation

◆ MmCompatibleProtectionMask

◆ MmHighSectionBase

◆ MmMakeFileAccess

◆ MmMakeSectionAccess

◆ MmSectionBasedMutex

◆ MmSectionBasedRoot

◆ MmSectionCommitMutex

◆ MmSession

◆ MmUserProtectionToMask1

◆ MmUserProtectionToMask2