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[NTOSKRNL] Get rid of pagefile-backed sections support in legacy Mm

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This commit is contained in:
Jérôme Gardou 2020-10-23 12:56:08 +02:00
parent 7afecee5eb
commit 819406ac97
2 changed files with 58 additions and 161 deletions
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1
ntoskrnl/include/internal/mm.h
View file

@ -87,7 +87,6 @@ typedef ULONG_PTR SWAPENTRY;
#define SEC_PHYSICALMEMORY (0x80000000)
#define MM_PAGEFILE_SEGMENT (0x1)
#define MM_DATAFILE_SEGMENT (0x2)
#define MC_CACHE (0)

218
ntoskrnl/mm/section.c
View file

@ -947,9 +947,7 @@ MmUnsharePageEntrySectionSegment(PROS_SECTION_OBJECT Section,
SavedSwapEntry = MmGetSavedSwapEntryPage(Page);
if (SavedSwapEntry == 0)
{
if (!PageOut &&
((Segment->Flags & MM_PAGEFILE_SEGMENT) ||
(Segment->Image.Characteristics & IMAGE_SCN_MEM_SHARED)))
if (!PageOut && (Segment->Image.Characteristics & IMAGE_SCN_MEM_SHARED))
{
/*
* FIXME:
@ -975,8 +973,7 @@ MmUnsharePageEntrySectionSegment(PROS_SECTION_OBJECT Section,
}
else
{
if ((Segment->Flags & MM_PAGEFILE_SEGMENT) ||
(Segment->Image.Characteristics & IMAGE_SCN_MEM_SHARED))
if (Segment->Image.Characteristics & IMAGE_SCN_MEM_SHARED)
{
if (!PageOut)
{
@ -1497,11 +1494,6 @@ MmNotPresentFaultSectionView(PMMSUPPORT AddressSpace,
/*
* Sanity check
*/
if (Segment->Flags & MM_PAGEFILE_SEGMENT)
{
DPRINT1("Found a swaped out private page in a pagefile section.\n");
KeBugCheck(MEMORY_MANAGEMENT);
}
MmDeletePageFileMapping(Process, Address, &SwapEntry);
}
@ -1614,9 +1606,8 @@ MmNotPresentFaultSectionView(PMMSUPPORT AddressSpace,
MmCreatePageFileMapping(Process, PAddress, MM_WAIT_ENTRY);
MmUnlockAddressSpace(AddressSpace);
if ((Segment->Flags & MM_PAGEFILE_SEGMENT) ||
((Offset.QuadPart >= (LONGLONG)PAGE_ROUND_UP(Segment->RawLength.QuadPart) &&
(Section->AllocationAttributes & SEC_IMAGE))))
if ((Offset.QuadPart >= (LONGLONG)PAGE_ROUND_UP(Segment->RawLength.QuadPart)) &&
(Section->AllocationAttributes & SEC_IMAGE))
{
MI_SET_USAGE(MI_USAGE_SECTION);
if (Process) MI_SET_PROCESS2(Process->ImageFileName);
@ -2102,8 +2093,7 @@ MmPageOutSectionView(PMMSUPPORT AddressSpace,
*/
if (!Context.Private && Entry != 0)
{
if (!(Context.Segment->Flags & MM_PAGEFILE_SEGMENT) &&
!(Context.Segment->Image.Characteristics & IMAGE_SCN_MEM_SHARED))
if (!(Context.Segment->Image.Characteristics & IMAGE_SCN_MEM_SHARED))
{
KeBugCheckEx(MEMORY_MANAGEMENT, Entry, (ULONG_PTR)Process, (ULONG_PTR)Address, 0);
}
@ -2117,26 +2107,7 @@ MmPageOutSectionView(PMMSUPPORT AddressSpace,
* we can't free the page at this point.
*/
SwapEntry = MmGetSavedSwapEntryPage(Page);
if (Context.Segment->Flags & MM_PAGEFILE_SEGMENT)
{
if (Context.Private)
{
DPRINT1("Found a %s private page (address %p) in a pagefile segment.\n",
Context.WasDirty ? "dirty" : "clean", Address);
KeBugCheckEx(MEMORY_MANAGEMENT, SwapEntry, (ULONG_PTR)Process, (ULONG_PTR)Address, 0);
}
if (!Context.WasDirty && SwapEntry != 0)
{
MmSetSavedSwapEntryPage(Page, 0);
MmLockSectionSegment(Context.Segment);
MmSetPageEntrySectionSegment(Context.Segment, &Context.Offset, MAKE_SWAP_SSE(SwapEntry));
MmUnlockSectionSegment(Context.Segment);
MmReleasePageMemoryConsumer(MC_USER, Page);
MiSetPageEvent(NULL, NULL);
return(STATUS_SUCCESS);
}
}
else if (Context.Segment->Image.Characteristics & IMAGE_SCN_MEM_SHARED)
if (Context.Segment->Image.Characteristics & IMAGE_SCN_MEM_SHARED)
{
if (Context.Private)
{
@ -2321,8 +2292,7 @@ MmPageOutSectionView(PMMSUPPORT AddressSpace,
*/
DPRINT("MM: Wrote section page 0x%.8X to swap!\n", Page << PAGE_SHIFT);
MmSetSavedSwapEntryPage(Page, 0);
if (Context.Segment->Flags & MM_PAGEFILE_SEGMENT ||
Context.Segment->Image.Characteristics & IMAGE_SCN_MEM_SHARED)
if (Context.Segment->Image.Characteristics & IMAGE_SCN_MEM_SHARED)
{
MmLockSectionSegment(Context.Segment);
MmSetPageEntrySectionSegment(Context.Segment, &Context.Offset, MAKE_SWAP_SSE(SwapEntry));
@ -2715,17 +2685,7 @@ MmpDeleteSection(PVOID ObjectBody)
if (Section->Segment == NULL)
return;
if (Section->Segment->Flags & MM_PAGEFILE_SEGMENT)
{
MmpFreePageFileSegment(Section->Segment);
MmFreePageTablesSectionSegment(Section->Segment, NULL);
ExFreePool(Section->Segment);
Section->Segment = NULL;
}
else
{
(void)InterlockedDecrementUL(&Section->Segment->ReferenceCount);
}
(void)InterlockedDecrementUL(&Section->Segment->ReferenceCount);
}
if (Section->FileObject != NULL)
{
@ -2758,29 +2718,65 @@ MmCreatePhysicalMemorySection(VOID)
UNICODE_STRING Name = RTL_CONSTANT_STRING(L"\\Device\\PhysicalMemory");
LARGE_INTEGER SectionSize;
HANDLE Handle;
PMM_SECTION_SEGMENT Segment;
/*
* Create the section mapping physical memory
*/
SectionSize.QuadPart = 0xFFFFFFFF;
SectionSize.QuadPart = ~((ULONG_PTR)0);
InitializeObjectAttributes(&Obj,
&Name,
OBJ_PERMANENT | OBJ_KERNEL_EXCLUSIVE,
NULL,
NULL);
Status = MmCreateSection((PVOID)&PhysSection,
SECTION_ALL_ACCESS,
&Obj,
&SectionSize,
PAGE_EXECUTE_READWRITE,
SEC_PHYSICALMEMORY,
NULL,
NULL);
/*
* Create the Object
*/
Status = ObCreateObject(KernelMode,
MmSectionObjectType,
&Obj,
ExGetPreviousMode(),
NULL,
sizeof(ROS_SECTION_OBJECT),
0,
0,
(PVOID*)&PhysSection);
if (!NT_SUCCESS(Status))
{
DPRINT1("Failed to create PhysicalMemory section\n");
KeBugCheck(MEMORY_MANAGEMENT);
DPRINT1("MmCreatePhysicalMemorySection: failed to create object (0x%lx)\n", Status);
return(Status);
}
/*
* Initialize it
*/
RtlZeroMemory(PhysSection, sizeof(ROS_SECTION_OBJECT));
PhysSection->Type = 'SC';
PhysSection->Size = 'TN';
PhysSection->InitialPageProtection = PAGE_EXECUTE_READWRITE;
PhysSection->AllocationAttributes = SEC_PHYSICALMEMORY;
PhysSection->SizeOfSection = SectionSize;
Segment = ExAllocatePoolWithTag(NonPagedPool, sizeof(MM_SECTION_SEGMENT),
TAG_MM_SECTION_SEGMENT);
if (Segment == NULL)
{
ObDereferenceObject(PhysSection);
return(STATUS_NO_MEMORY);
}
RtlZeroMemory(Segment, sizeof(MM_SECTION_SEGMENT));
PhysSection->Segment = Segment;
Segment->ReferenceCount = 1;
ExInitializeFastMutex(&Segment->Lock);
Segment->Image.FileOffset = 0;
Segment->Protection = PAGE_EXECUTE_READWRITE;
Segment->RawLength = SectionSize;
Segment->Length = SectionSize;
Segment->Flags = 0;
Segment->WriteCopy = FALSE;
Segment->Image.VirtualAddress = 0;
Segment->Image.Characteristics = 0;
MiInitializeSectionPageTable(Segment);
Status = ObInsertObject(PhysSection,
NULL,
SECTION_ALL_ACCESS,
@ -2792,8 +2788,6 @@ MmCreatePhysicalMemorySection(VOID)
ObDereferenceObject(PhysSection);
}
ObCloseHandle(Handle, KernelMode);
PhysSection->AllocationAttributes |= SEC_PHYSICALMEMORY;
PhysSection->Segment->Flags &= ~MM_PAGEFILE_SEGMENT;
return(STATUS_SUCCESS);
}
@ -2831,81 +2825,6 @@ MmInitSectionImplementation(VOID)
return(STATUS_SUCCESS);
}
NTSTATUS
NTAPI
MmCreatePageFileSection(PROS_SECTION_OBJECT *SectionObject,
ACCESS_MASK DesiredAccess,
POBJECT_ATTRIBUTES ObjectAttributes,
PLARGE_INTEGER UMaximumSize,
ULONG SectionPageProtection,
ULONG AllocationAttributes)
/*
* Create a section which is backed by the pagefile
*/
{
LARGE_INTEGER MaximumSize;
PROS_SECTION_OBJECT Section;
PMM_SECTION_SEGMENT Segment;
NTSTATUS Status;
if (UMaximumSize == NULL)
{
DPRINT1("MmCreatePageFileSection: (UMaximumSize == NULL)\n");
return(STATUS_INVALID_PARAMETER);
}
MaximumSize = *UMaximumSize;
/*
* Create the section
*/
Status = ObCreateObject(ExGetPreviousMode(),
MmSectionObjectType,
ObjectAttributes,
ExGetPreviousMode(),
NULL,
sizeof(ROS_SECTION_OBJECT),
0,
0,
(PVOID*)(PVOID)&Section);
if (!NT_SUCCESS(Status))
{
DPRINT1("MmCreatePageFileSection: failed to create object (0x%lx)\n", Status);
return(Status);
}
/*
* Initialize it
*/
RtlZeroMemory(Section, sizeof(ROS_SECTION_OBJECT));
Section->Type = 'SC';
Section->Size = 'TN';
Section->InitialPageProtection = SectionPageProtection;
Section->AllocationAttributes = AllocationAttributes;
Section->SizeOfSection = MaximumSize;
Segment = ExAllocatePoolWithTag(NonPagedPool, sizeof(MM_SECTION_SEGMENT),
TAG_MM_SECTION_SEGMENT);
if (Segment == NULL)
{
ObDereferenceObject(Section);
return(STATUS_NO_MEMORY);
}
RtlZeroMemory(Segment, sizeof(MM_SECTION_SEGMENT));
Section->Segment = Segment;
Segment->ReferenceCount = 1;
ExInitializeFastMutex(&Segment->Lock);
Segment->Image.FileOffset = 0;
Segment->Protection = SectionPageProtection;
Segment->RawLength.QuadPart = MaximumSize.u.LowPart;
Segment->Length.QuadPart = PAGE_ROUND_UP(MaximumSize.u.LowPart);
Segment->Flags = MM_PAGEFILE_SEGMENT;
Segment->WriteCopy = FALSE;
Segment->Image.VirtualAddress = 0;
Segment->Image.Characteristics = 0;
*SectionObject = Section;
MiInitializeSectionPageTable(Segment);
return(STATUS_SUCCESS);
}
NTSTATUS
NTAPI
MmCreateDataFileSection(PROS_SECTION_OBJECT *SectionObject,
@ -4026,11 +3945,6 @@ MmFreeSectionPage(PVOID Context, MEMORY_AREA* MemoryArea, PVOID Address,
/*
* Sanity check
*/
if (Segment->Flags & MM_PAGEFILE_SEGMENT)
{
DPRINT1("Found a swap entry for a page in a pagefile section.\n");
KeBugCheck(MEMORY_MANAGEMENT);
}
MmFreeSwapPage(SwapEntry);
}
else if (Page != 0)
@ -4038,14 +3952,6 @@ MmFreeSectionPage(PVOID Context, MEMORY_AREA* MemoryArea, PVOID Address,
if (IS_SWAP_FROM_SSE(Entry) ||
Page != PFN_FROM_SSE(Entry))
{
/*
* Sanity check
*/
if (Segment->Flags & MM_PAGEFILE_SEGMENT)
{
DPRINT1("Found a private page in a pagefile section.\n");
KeBugCheck(MEMORY_MANAGEMENT);
}
/*
* Just dereference private pages
*/
@ -5140,17 +5046,9 @@ MmCreateSection (OUT PVOID * Section,
#endif
else
{
if ((AllocationAttributes & SEC_PHYSICALMEMORY) == 0)
{
DPRINT1("Invalid path: %lx %p %p\n", AllocationAttributes, FileObject, FileHandle);
}
// ASSERT(AllocationAttributes & SEC_PHYSICALMEMORY);
Status = MmCreatePageFileSection(SectionObject,
DesiredAccess,
ObjectAttributes,
MaximumSize,
SectionPageProtection,
AllocationAttributes);
/* All cases should be handled above, and the Physical Memorw section was created at initialization phase */
ASSERT(FALSE);
Status = STATUS_INVALID_PARAMETER;
if (FileObject)
ObDereferenceObject(FileObject);
}