#define NDEBUG
#include <debug.h>
-#define MI_MAPPED_COPY_PAGES 16
-#define MI_POOL_COPY_BYTES 512
-#define MI_MAX_TRANSFER_SIZE 64 * 1024
-#define TAG_VM TAG('V', 'm', 'R', 'w')
-
/* PRIVATE FUNCTIONS **********************************************************/
-static
-int
-MiGetExceptionInfo(EXCEPTION_POINTERS *ExceptionInfo, BOOLEAN * HaveBadAddress, ULONG_PTR * BadAddress)
-{
- PEXCEPTION_RECORD ExceptionRecord;
- PAGED_CODE();
-
- /* Assume default */
- *HaveBadAddress = FALSE;
-
- /* Get the exception record */
- ExceptionRecord = ExceptionInfo->ExceptionRecord;
-
- /* Look at the exception code */
- if ((ExceptionRecord->ExceptionCode == STATUS_ACCESS_VIOLATION) ||
- (ExceptionRecord->ExceptionCode == STATUS_GUARD_PAGE_VIOLATION) ||
- (ExceptionRecord->ExceptionCode == STATUS_IN_PAGE_ERROR))
- {
- /* We can tell the address if we have more than one parameter */
- if (ExceptionRecord->NumberParameters > 1)
- {
- /* Return the address */
- *HaveBadAddress = TRUE;
- *BadAddress = ExceptionRecord->ExceptionInformation[1];
- }
- }
-
- /* Continue executing the next handler */
- return EXCEPTION_EXECUTE_HANDLER;
-}
-
-NTSTATUS
-NTAPI
-MiDoMappedCopy(IN PEPROCESS SourceProcess,
- IN PVOID SourceAddress,
- IN PEPROCESS TargetProcess,
- OUT PVOID TargetAddress,
- IN SIZE_T BufferSize,
- IN KPROCESSOR_MODE PreviousMode,
- OUT PSIZE_T ReturnSize)
-{
- PFN_NUMBER MdlBuffer[(sizeof(MDL) / sizeof(PFN_NUMBER)) + MI_MAPPED_COPY_PAGES + 1];
- PMDL Mdl = (PMDL)MdlBuffer;
- SIZE_T TotalSize, CurrentSize, RemainingSize;
- volatile BOOLEAN FailedInProbe = FALSE, FailedInMapping = FALSE, FailedInMoving;
- volatile BOOLEAN PagesLocked;
- PVOID CurrentAddress = SourceAddress, CurrentTargetAddress = TargetAddress;
- volatile PVOID MdlAddress;
- KAPC_STATE ApcState;
- BOOLEAN HaveBadAddress;
- ULONG_PTR BadAddress;
- NTSTATUS Status = STATUS_SUCCESS;
- PAGED_CODE();
-
- /* Calculate the maximum amount of data to move */
- TotalSize = (MI_MAPPED_COPY_PAGES - 2) * PAGE_SIZE;
- if (BufferSize <= TotalSize) TotalSize = BufferSize;
- CurrentSize = TotalSize;
- RemainingSize = BufferSize;
-
- /* Loop as long as there is still data */
- while (RemainingSize > 0)
- {
- /* Check if this transfer will finish everything off */
- if (RemainingSize < CurrentSize) CurrentSize = RemainingSize;
-
- /* Attach to the source address space */
- KeStackAttachProcess(&SourceProcess->Pcb, &ApcState);
-
- /* Reset state for this pass */
- MdlAddress = NULL;
- PagesLocked = FALSE;
- FailedInMoving = FALSE;
- ASSERT(FailedInProbe == FALSE);
-
- /* Protect user-mode copy */
- _SEH2_TRY
- {
- /* If this is our first time, probe the buffer */
- if ((CurrentAddress == SourceAddress) && (PreviousMode != KernelMode))
- {
- /* Catch a failure here */
- FailedInProbe = TRUE;
-
- /* Do the probe */
- ProbeForRead(SourceAddress, BufferSize, sizeof(CHAR));
-
- /* Passed */
- FailedInProbe = FALSE;
- }
-
- /* Initialize and probe and lock the MDL */
- MmInitializeMdl (Mdl, CurrentAddress, CurrentSize);
- MmProbeAndLockPages (Mdl, PreviousMode, IoReadAccess);
- PagesLocked = TRUE;
-
- /* Now map the pages */
- MdlAddress = MmMapLockedPagesSpecifyCache(Mdl,
- KernelMode,
- MmCached,
- NULL,
- FALSE,
- HighPagePriority);
- if (!MdlAddress)
- {
- /* Use our SEH handler to pick this up */
- FailedInMapping = TRUE;
- ExRaiseStatus(STATUS_INSUFFICIENT_RESOURCES);
- }
-
- /* Now let go of the source and grab to the target process */
- KeUnstackDetachProcess(&ApcState);
- KeStackAttachProcess(&TargetProcess->Pcb, &ApcState);
-
- /* Check if this is our first time through */
- if ((CurrentAddress == SourceAddress) && (PreviousMode != KernelMode))
- {
- /* Catch a failure here */
- FailedInProbe = TRUE;
-
- /* Do the probe */
- ProbeForWrite(TargetAddress, BufferSize, sizeof(CHAR));
-
- /* Passed */
- FailedInProbe = FALSE;
- }
-
- /* Now do the actual move */
- FailedInMoving = TRUE;
- RtlCopyMemory(CurrentTargetAddress, MdlAddress, CurrentSize);
- }
- _SEH2_EXCEPT(MiGetExceptionInfo(_SEH2_GetExceptionInformation(), &HaveBadAddress, &BadAddress))
- {
- /* Detach from whoever we may be attached to */
- KeUnstackDetachProcess(&ApcState);
-
- /* Check if we had mapped the pages */
- if (MdlAddress) MmUnmapLockedPages(MdlAddress, Mdl);
-
- /* Check if we had locked the pages */
- if (PagesLocked) MmUnlockPages(Mdl);
-
- /* Check if we failed during the probe or mapping */
- if ((FailedInProbe) || (FailedInMapping))
- {
- /* Exit */
- Status = _SEH2_GetExceptionCode();
- _SEH2_YIELD(return Status);
- }
-
- /* Otherwise, we failed probably during the move */
- *ReturnSize = BufferSize - RemainingSize;
- if (FailedInMoving)
- {
- /* Check if we know exactly where we stopped copying */
- if (HaveBadAddress)
- {
- /* Return the exact number of bytes copied */
- *ReturnSize = BadAddress - (ULONG_PTR)SourceAddress;
- }
- }
-
- /* Return partial copy */
- Status = STATUS_PARTIAL_COPY;
- }
- _SEH2_END;
-
- /* Check for SEH status */
- if (Status != STATUS_SUCCESS) return Status;
-
- /* Detach from target */
- KeUnstackDetachProcess(&ApcState);
-
- /* Unmap and unlock */
- MmUnmapLockedPages(MdlAddress, Mdl);
- MmUnlockPages(Mdl);
-
- /* Update location and size */
- RemainingSize -= CurrentSize;
- CurrentAddress = (PVOID)((ULONG_PTR)CurrentAddress + CurrentSize);
- CurrentTargetAddress = (PVOID)((ULONG_PTR)CurrentTargetAddress + CurrentSize);
- }
-
- /* All bytes read */
- *ReturnSize = BufferSize;
- return STATUS_SUCCESS;
-}
-
-NTSTATUS
-NTAPI
-MiDoPoolCopy(IN PEPROCESS SourceProcess,
- IN PVOID SourceAddress,
- IN PEPROCESS TargetProcess,
- OUT PVOID TargetAddress,
- IN SIZE_T BufferSize,
- IN KPROCESSOR_MODE PreviousMode,
- OUT PSIZE_T ReturnSize)
-{
- UCHAR StackBuffer[MI_POOL_COPY_BYTES];
- SIZE_T TotalSize, CurrentSize, RemainingSize;
- volatile BOOLEAN FailedInProbe = FALSE, FailedInMoving, HavePoolAddress = FALSE;
- PVOID CurrentAddress = SourceAddress, CurrentTargetAddress = TargetAddress;
- PVOID PoolAddress;
- KAPC_STATE ApcState;
- BOOLEAN HaveBadAddress;
- ULONG_PTR BadAddress;
- NTSTATUS Status = STATUS_SUCCESS;
- PAGED_CODE();
-
- /* Calculate the maximum amount of data to move */
- TotalSize = MI_MAX_TRANSFER_SIZE;
- if (BufferSize <= MI_MAX_TRANSFER_SIZE) TotalSize = BufferSize;
- CurrentSize = TotalSize;
- RemainingSize = BufferSize;
-
- /* Check if we can use the stack */
- if (BufferSize <= MI_POOL_COPY_BYTES)
- {
- /* Use it */
- PoolAddress = (PVOID)StackBuffer;
- }
- else
- {
- /* Allocate pool */
- PoolAddress = ExAllocatePoolWithTag(NonPagedPool, TotalSize, TAG_VM);
- if (!PoolAddress) ASSERT(FALSE);
- HavePoolAddress = TRUE;
- }
-
- /* Loop as long as there is still data */
- while (RemainingSize > 0)
- {
- /* Check if this transfer will finish everything off */
- if (RemainingSize < CurrentSize) CurrentSize = RemainingSize;
-
- /* Attach to the source address space */
- KeStackAttachProcess(&SourceProcess->Pcb, &ApcState);
-
- /* Reset state for this pass */
- FailedInMoving = FALSE;
- ASSERT(FailedInProbe == FALSE);
-
- /* Protect user-mode copy */
- _SEH2_TRY
- {
- /* If this is our first time, probe the buffer */
- if ((CurrentAddress == SourceAddress) && (PreviousMode != KernelMode))
- {
- /* Catch a failure here */
- FailedInProbe = TRUE;
-
- /* Do the probe */
- ProbeForRead(SourceAddress, BufferSize, sizeof(CHAR));
-
- /* Passed */
- FailedInProbe = FALSE;
- }
-
- /* Do the copy */
- RtlCopyMemory(PoolAddress, CurrentAddress, CurrentSize);
-
- /* Now let go of the source and grab to the target process */
- KeUnstackDetachProcess(&ApcState);
- KeStackAttachProcess(&TargetProcess->Pcb, &ApcState);
-
- /* Check if this is our first time through */
- if ((CurrentAddress == SourceAddress) && (PreviousMode != KernelMode))
- {
- /* Catch a failure here */
- FailedInProbe = TRUE;
-
- /* Do the probe */
- ProbeForWrite(TargetAddress, BufferSize, sizeof(CHAR));
-
- /* Passed */
- FailedInProbe = FALSE;
- }
-
- /* Now do the actual move */
- FailedInMoving = TRUE;
- RtlCopyMemory(CurrentTargetAddress, PoolAddress, CurrentSize);
- }
- _SEH2_EXCEPT(MiGetExceptionInfo(_SEH2_GetExceptionInformation(), &HaveBadAddress, &BadAddress))
- {
- /* Detach from whoever we may be attached to */
- KeUnstackDetachProcess(&ApcState);
-
- /* Check if we had allocated pool */
- if (HavePoolAddress) ExFreePool(PoolAddress);
-
- /* Check if we failed during the probe */
- if (FailedInProbe)
- {
- /* Exit */
- Status = _SEH2_GetExceptionCode();
- _SEH2_YIELD(return Status);
- }
-
- /* Otherwise, we failed probably during the move */
- *ReturnSize = BufferSize - RemainingSize;
- if (FailedInMoving)
- {
- /* Check if we know exactly where we stopped copying */
- if (HaveBadAddress)
- {
- /* Return the exact number of bytes copied */
- *ReturnSize = BadAddress - (ULONG_PTR)SourceAddress;
- }
- }
-
- /* Return partial copy */
- Status = STATUS_PARTIAL_COPY;
- }
- _SEH2_END;
-
- /* Check for SEH status */
- if (Status != STATUS_SUCCESS) return Status;
-
- /* Detach from target */
- KeUnstackDetachProcess(&ApcState);
-
- /* Update location and size */
- RemainingSize -= CurrentSize;
- CurrentAddress = (PVOID)((ULONG_PTR)CurrentAddress + CurrentSize);
- CurrentTargetAddress = (PVOID)((ULONG_PTR)CurrentTargetAddress + CurrentSize);
- }
-
- /* Check if we had allocated pool */
- if (HavePoolAddress) ExFreePool(PoolAddress);
-
- /* All bytes read */
- *ReturnSize = BufferSize;
- return STATUS_SUCCESS;
-}
-
-NTSTATUS
-NTAPI
-MmCopyVirtualMemory(IN PEPROCESS SourceProcess,
- IN PVOID SourceAddress,
- IN PEPROCESS TargetProcess,
- OUT PVOID TargetAddress,
- IN SIZE_T BufferSize,
- IN KPROCESSOR_MODE PreviousMode,
- OUT PSIZE_T ReturnSize)
-{
- NTSTATUS Status;
- PEPROCESS Process = SourceProcess;
-
- /* Don't accept zero-sized buffers */
- if (!BufferSize) return STATUS_SUCCESS;
-
- /* If we are copying from ourselves, lock the target instead */
- if (SourceProcess == PsGetCurrentProcess()) Process = TargetProcess;
-
- /* Acquire rundown protection */
- if (!ExAcquireRundownProtection(&Process->RundownProtect))
- {
- /* Fail */
- return STATUS_PROCESS_IS_TERMINATING;
- }
-
- /* See if we should use the pool copy */
- if (BufferSize > MI_POOL_COPY_BYTES)
- {
- /* Use MDL-copy */
- Status = MiDoMappedCopy(SourceProcess,
- SourceAddress,
- TargetProcess,
- TargetAddress,
- BufferSize,
- PreviousMode,
- ReturnSize);
- }
- else
- {
- /* Do pool copy */
- Status = MiDoPoolCopy(SourceProcess,
- SourceAddress,
- TargetProcess,
- TargetAddress,
- BufferSize,
- PreviousMode,
- ReturnSize);
- }
-
- /* Release the lock */
- ExReleaseRundownProtection(&Process->RundownProtect);
- return Status;
-}
-
NTSTATUS FASTCALL
MiQueryVirtualMemory(IN HANDLE ProcessHandle,
IN PVOID Address,
NTSTATUS Status;
PEPROCESS Process;
MEMORY_AREA* MemoryArea;
- PMM_AVL_TABLE AddressSpace;
+ PMMSUPPORT AddressSpace;
Status = ObReferenceObjectByHandle(ProcessHandle,
PROCESS_QUERY_INFORMATION,
return(Status);
}
- AddressSpace = &Process->VadRoot;
+ AddressSpace = &Process->Vm;
MmLockAddressSpace(AddressSpace);
MemoryArea = MmLocateMemoryAreaByAddress(AddressSpace, Address);
switch(MemoryArea->Type)
{
case MEMORY_AREA_VIRTUAL_MEMORY:
- case MEMORY_AREA_PEB_OR_TEB:
Status = MmQueryAnonMem(MemoryArea, Address, Info,
ResultLength);
break;
ResultLength);
break;
- case MEMORY_AREA_NO_ACCESS:
- Info->Type = MEM_PRIVATE;
- Info->State = MEM_RESERVE;
- Info->Protect = MemoryArea->Protect;
- Info->AllocationProtect = MemoryArea->Protect;
- Info->BaseAddress = MemoryArea->StartingAddress;
- Info->AllocationBase = MemoryArea->StartingAddress;
- Info->RegionSize = (ULONG_PTR)MemoryArea->EndingAddress -
- (ULONG_PTR)MemoryArea->StartingAddress;
- Status = STATUS_SUCCESS;
- *ResultLength = sizeof(MEMORY_BASIC_INFORMATION);
- break;
-
- case MEMORY_AREA_SHARED_DATA:
- Info->Type = MEM_PRIVATE;
- Info->State = MEM_COMMIT;
- Info->Protect = MemoryArea->Protect;
- Info->AllocationProtect = MemoryArea->Protect;
- Info->BaseAddress = MemoryArea->StartingAddress;
- Info->AllocationBase = MemoryArea->StartingAddress;
- Info->RegionSize = (ULONG_PTR)MemoryArea->EndingAddress -
- (ULONG_PTR)MemoryArea->StartingAddress;
- Status = STATUS_SUCCESS;
- *ResultLength = sizeof(MEMORY_BASIC_INFORMATION);
- break;
-
- case MEMORY_AREA_SYSTEM:
- Info->Type = 0;
- Info->State = MEM_COMMIT;
- Info->Protect = MemoryArea->Protect;
- Info->AllocationProtect = MemoryArea->Protect;
- Info->BaseAddress = MemoryArea->StartingAddress;
- Info->AllocationBase = MemoryArea->StartingAddress;
- Info->RegionSize = (ULONG_PTR)MemoryArea->EndingAddress -
- (ULONG_PTR)MemoryArea->StartingAddress;
- Status = STATUS_SUCCESS;
- *ResultLength = sizeof(MEMORY_BASIC_INFORMATION);
- break;
-
- case MEMORY_AREA_KERNEL_STACK:
- Info->Type = 0;
- Info->State = MEM_COMMIT;
- Info->Protect = MemoryArea->Protect;
- Info->AllocationProtect = MemoryArea->Protect;
- Info->BaseAddress = MemoryArea->StartingAddress;
- Info->AllocationBase = MemoryArea->StartingAddress;
- Info->RegionSize = (ULONG_PTR)MemoryArea->EndingAddress -
- (ULONG_PTR)MemoryArea->StartingAddress;
- Status = STATUS_SUCCESS;
- *ResultLength = sizeof(MEMORY_BASIC_INFORMATION);
- break;
-
- case MEMORY_AREA_PAGED_POOL:
- Info->Type = 0;
- Info->State = MEM_COMMIT;
- Info->Protect = MemoryArea->Protect;
- Info->AllocationProtect = MemoryArea->Protect;
- Info->BaseAddress = MemoryArea->StartingAddress;
- Info->AllocationBase = MemoryArea->StartingAddress;
- Info->RegionSize = (ULONG_PTR)MemoryArea->EndingAddress -
- (ULONG_PTR)MemoryArea->StartingAddress;
- Status = STATUS_SUCCESS;
- *ResultLength = sizeof(MEMORY_BASIC_INFORMATION);
- break;
-
default:
DPRINT1("unhandled memory area type: 0x%x\n", MemoryArea->Type);
Status = STATUS_UNSUCCESSFUL;
default:
{
+ DPRINT1("Unsupported or unimplemented class: %lx\n", VirtualMemoryInformationClass);
Status = STATUS_INVALID_INFO_CLASS;
*ResultLength = 0;
break;
OUT PULONG OldAccessProtection OPTIONAL)
{
PMEMORY_AREA MemoryArea;
- PMM_AVL_TABLE AddressSpace;
+ PMMSUPPORT AddressSpace;
ULONG OldAccessProtection_;
NTSTATUS Status;
PAGE_ROUND_DOWN(*BaseAddress);
*BaseAddress = (PVOID)PAGE_ROUND_DOWN(*BaseAddress);
- AddressSpace = &Process->VadRoot;
+ AddressSpace = &Process->Vm;
MmLockAddressSpace(AddressSpace);
MemoryArea = MmLocateMemoryAreaByAddress(AddressSpace, *BaseAddress);
return Status;
}
-/* PUBLIC FUNCTIONS ***********************************************************/
-
-/*
- * @unimplemented
- */
-PVOID
-NTAPI
-MmGetVirtualForPhysical(IN PHYSICAL_ADDRESS PhysicalAddress)
-{
- UNIMPLEMENTED;
- return 0;
-}
-
-/*
- * @unimplemented
- */
PVOID
NTAPI
-MmSecureVirtualMemory(IN PVOID Address,
- IN SIZE_T Length,
- IN ULONG Mode)
+MiMapLockedPagesInUserSpace(IN PMDL Mdl,
+ IN PVOID BaseVa,
+ IN MEMORY_CACHING_TYPE CacheType,
+ IN PVOID BaseAddress)
{
- UNIMPLEMENTED;
- return NULL;
-}
-
-/*
- * @unimplemented
- */
-VOID
-NTAPI
-MmUnsecureVirtualMemory(IN PVOID SecureMem)
-{
- UNIMPLEMENTED;
-}
-
-/* SYSTEM CALLS ***************************************************************/
-
-NTSTATUS
-NTAPI
-NtReadVirtualMemory(IN HANDLE ProcessHandle,
- IN PVOID BaseAddress,
- OUT PVOID Buffer,
- IN SIZE_T NumberOfBytesToRead,
- OUT PSIZE_T NumberOfBytesRead OPTIONAL)
-{
- KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
- PEPROCESS Process;
- NTSTATUS Status = STATUS_SUCCESS;
- SIZE_T BytesRead = 0;
- PAGED_CODE();
-
- /* Check if we came from user mode */
- if (PreviousMode != KernelMode)
- {
- /* Validate the read addresses */
- if ((((ULONG_PTR)BaseAddress + NumberOfBytesToRead) < (ULONG_PTR)BaseAddress) ||
- (((ULONG_PTR)Buffer + NumberOfBytesToRead) < (ULONG_PTR)Buffer) ||
- (((ULONG_PTR)BaseAddress + NumberOfBytesToRead) > MmUserProbeAddress) ||
- (((ULONG_PTR)Buffer + NumberOfBytesToRead) > MmUserProbeAddress))
- {
- /* Don't allow to write into kernel space */
- return STATUS_ACCESS_VIOLATION;
- }
-
- /* Enter SEH for probe */
- _SEH2_TRY
- {
- /* Probe the output value */
- if (NumberOfBytesRead) ProbeForWriteSize_t(NumberOfBytesRead);
- }
- _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
- {
- /* Get exception code */
- Status = _SEH2_GetExceptionCode();
- }
- _SEH2_END;
-
- /* Return if we failed */
- if (!NT_SUCCESS(Status)) return Status;
- }
-
- /* Reference the process */
- Status = ObReferenceObjectByHandle(ProcessHandle,
- PROCESS_VM_READ,
- PsProcessType,
- PreviousMode,
- (PVOID*)(&Process),
- NULL);
- if (NT_SUCCESS(Status))
- {
- /* Do the copy */
- Status = MmCopyVirtualMemory(Process,
- BaseAddress,
- PsGetCurrentProcess(),
- Buffer,
- NumberOfBytesToRead,
- PreviousMode,
- &BytesRead);
-
- /* Dereference the process */
- ObDereferenceObject(Process);
- }
-
- /* Check if the caller sent this parameter */
- if (NumberOfBytesRead)
+ PVOID Base;
+ PPFN_NUMBER MdlPages;
+ ULONG PageCount;
+ PEPROCESS CurrentProcess;
+ NTSTATUS Status;
+ ULONG Protect;
+ MEMORY_AREA *Result;
+ LARGE_INTEGER BoundaryAddressMultiple;
+
+ /* Calculate the number of pages required. */
+ MdlPages = (PPFN_NUMBER)(Mdl + 1);
+ PageCount = PAGE_ROUND_UP(Mdl->ByteCount + Mdl->ByteOffset) / PAGE_SIZE;
+
+ /* Set default page protection */
+ Protect = PAGE_READWRITE;
+ if (CacheType == MmNonCached) Protect |= PAGE_NOCACHE;
+
+ BoundaryAddressMultiple.QuadPart = 0;
+ Base = BaseAddress;
+
+ CurrentProcess = PsGetCurrentProcess();
+
+ MmLockAddressSpace(&CurrentProcess->Vm);
+ Status = MmCreateMemoryArea(&CurrentProcess->Vm,
+ MEMORY_AREA_MDL_MAPPING,
+ &Base,
+ PageCount * PAGE_SIZE,
+ Protect,
+ &Result,
+ (Base != NULL),
+ 0,
+ BoundaryAddressMultiple);
+ MmUnlockAddressSpace(&CurrentProcess->Vm);
+ if (!NT_SUCCESS(Status))
{
- /* Enter SEH to guard write */
- _SEH2_TRY
- {
- /* Return the number of bytes read */
- *NumberOfBytesRead = BytesRead;
- }
- _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+ if (Mdl->MdlFlags & MDL_MAPPING_CAN_FAIL)
{
- /* Handle exception */
- Status = _SEH2_GetExceptionCode();
+ return NULL;
}
- _SEH2_END;
+
+ /* Throw exception */
+ ExRaiseStatus(STATUS_ACCESS_VIOLATION);
+ ASSERT(0);
}
-
- /* Return status */
- return Status;
-}
-
-NTSTATUS
-NTAPI
-NtWriteVirtualMemory(IN HANDLE ProcessHandle,
- IN PVOID BaseAddress,
- IN PVOID Buffer,
- IN SIZE_T NumberOfBytesToWrite,
- OUT PSIZE_T NumberOfBytesWritten OPTIONAL)
-{
- KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
- PEPROCESS Process;
- NTSTATUS Status = STATUS_SUCCESS;
- SIZE_T BytesWritten = 0;
- PAGED_CODE();
-
- /* Check if we came from user mode */
- if (PreviousMode != KernelMode)
+
+ /* Set the virtual mappings for the MDL pages. */
+ if (Mdl->MdlFlags & MDL_IO_SPACE)
{
- /* Validate the read addresses */
- if ((((ULONG_PTR)BaseAddress + NumberOfBytesToWrite) < (ULONG_PTR)BaseAddress) ||
- (((ULONG_PTR)Buffer + NumberOfBytesToWrite) < (ULONG_PTR)Buffer) ||
- (((ULONG_PTR)BaseAddress + NumberOfBytesToWrite) > MmUserProbeAddress) ||
- (((ULONG_PTR)Buffer + NumberOfBytesToWrite) > MmUserProbeAddress))
- {
- /* Don't allow to write into kernel space */
- return STATUS_ACCESS_VIOLATION;
- }
-
- /* Enter SEH for probe */
- _SEH2_TRY
- {
- /* Probe the output value */
- if (NumberOfBytesWritten) ProbeForWriteSize_t(NumberOfBytesWritten);
- }
- _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
- {
- /* Get exception code */
- Status = _SEH2_GetExceptionCode();
- }
- _SEH2_END;
-
- /* Return if we failed */
- if (!NT_SUCCESS(Status)) return Status;
+ /* Map the pages */
+ Status = MmCreateVirtualMappingUnsafe(CurrentProcess,
+ Base,
+ Protect,
+ MdlPages,
+ PageCount);
}
-
- /* Reference the process */
- Status = ObReferenceObjectByHandle(ProcessHandle,
- PROCESS_VM_WRITE,
- PsProcessType,
- PreviousMode,
- (PVOID*)&Process,
- NULL);
- if (NT_SUCCESS(Status))
+ else
{
- /* Do the copy */
- Status = MmCopyVirtualMemory(PsGetCurrentProcess(),
- Buffer,
- Process,
- BaseAddress,
- NumberOfBytesToWrite,
- PreviousMode,
- &BytesWritten);
-
- /* Dereference the process */
- ObDereferenceObject(Process);
+ /* Map the pages */
+ Status = MmCreateVirtualMapping(CurrentProcess,
+ Base,
+ Protect,
+ MdlPages,
+ PageCount);
}
-
- /* Check if the caller sent this parameter */
- if (NumberOfBytesWritten)
+
+ /* Check if the mapping suceeded */
+ if (!NT_SUCCESS(Status))
{
- /* Enter SEH to guard write */
- _SEH2_TRY
- {
- /* Return the number of bytes read */
- *NumberOfBytesWritten = BytesWritten;
- }
- _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
- {
- /* Handle exception */
- Status = _SEH2_GetExceptionCode();
- }
- _SEH2_END;
+ /* If it can fail, return NULL */
+ if (Mdl->MdlFlags & MDL_MAPPING_CAN_FAIL) return NULL;
+
+ /* Throw exception */
+ ExRaiseStatus(STATUS_ACCESS_VIOLATION);
}
-
- /* Return status */
- return Status;
+
+ /* Return the base */
+ Base = (PVOID)((ULONG_PTR)Base + Mdl->ByteOffset);
+ return Base;
}
-NTSTATUS
+VOID
NTAPI
-NtProtectVirtualMemory(IN HANDLE ProcessHandle,
- IN OUT PVOID *UnsafeBaseAddress,
- IN OUT SIZE_T *UnsafeNumberOfBytesToProtect,
- IN ULONG NewAccessProtection,
- OUT PULONG UnsafeOldAccessProtection)
+MiUnmapLockedPagesInUserSpace(IN PVOID BaseAddress,
+ IN PMDL Mdl)
{
- PEPROCESS Process;
- ULONG OldAccessProtection;
- PVOID BaseAddress = NULL;
- SIZE_T NumberOfBytesToProtect = 0;
- KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
- NTSTATUS Status = STATUS_SUCCESS;
-
- /* Check if we came from user mode */
- if (PreviousMode != KernelMode)
- {
- /* Enter SEH for probing */
- _SEH2_TRY
- {
- /* Validate all outputs */
- ProbeForWritePointer(UnsafeBaseAddress);
- ProbeForWriteSize_t(UnsafeNumberOfBytesToProtect);
- ProbeForWriteUlong(UnsafeOldAccessProtection);
-
- /* Capture them */
- BaseAddress = *UnsafeBaseAddress;
- NumberOfBytesToProtect = *UnsafeNumberOfBytesToProtect;
- }
- _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
- {
- /* Get exception code */
- Status = _SEH2_GetExceptionCode();
- }
- _SEH2_END;
-
- /* Return on exception */
- if (!NT_SUCCESS(Status)) return Status;
- }
- else
- {
- /* Capture directly */
- BaseAddress = *UnsafeBaseAddress;
- NumberOfBytesToProtect = *UnsafeNumberOfBytesToProtect;
- }
-
- /* Catch illegal base address */
- if (BaseAddress > (PVOID)MmUserProbeAddress) return STATUS_INVALID_PARAMETER_2;
-
- /* Catch illegal region size */
- if ((MmUserProbeAddress - (ULONG_PTR)BaseAddress) < NumberOfBytesToProtect)
- {
- /* Fail */
- return STATUS_INVALID_PARAMETER_3;
- }
-
- /* 0 is also illegal */
- if (!NumberOfBytesToProtect) return STATUS_INVALID_PARAMETER_3;
-
- /* Get a reference to the process */
- Status = ObReferenceObjectByHandle(ProcessHandle,
- PROCESS_VM_OPERATION,
- PsProcessType,
- PreviousMode,
- (PVOID*)(&Process),
- NULL);
- if (!NT_SUCCESS(Status)) return Status;
-
- /* Do the actual work */
- Status = MiProtectVirtualMemory(Process,
- &BaseAddress,
- &NumberOfBytesToProtect,
- NewAccessProtection,
- &OldAccessProtection);
-
- /* Release reference */
- ObDereferenceObject(Process);
-
- /* Enter SEH to return data */
- _SEH2_TRY
- {
- /* Return data to user */
- *UnsafeOldAccessProtection = OldAccessProtection;
- *UnsafeBaseAddress = BaseAddress;
- *UnsafeNumberOfBytesToProtect = NumberOfBytesToProtect;
- }
- _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
- {
- /* Catch exception */
- Status = _SEH2_GetExceptionCode();
- }
- _SEH2_END;
-
- /* Return status */
- return Status;
+ PMEMORY_AREA MemoryArea;
+
+ /* Sanity check */
+ ASSERT(Mdl->Process == PsGetCurrentProcess());
+
+ /* Find the memory area */
+ MemoryArea = MmLocateMemoryAreaByAddress(&Mdl->Process->Vm,
+ BaseAddress);
+ ASSERT(MemoryArea);
+
+ /* Free it */
+ MmFreeMemoryArea(&Mdl->Process->Vm,
+ MemoryArea,
+ NULL,
+ NULL);
}
+/* SYSTEM CALLS ***************************************************************/
+
NTSTATUS NTAPI
NtQueryVirtualMemory(IN HANDLE ProcessHandle,
IN PVOID Address,
IN SIZE_T Length,
OUT PSIZE_T UnsafeResultLength)
{
- NTSTATUS Status = STATUS_SUCCESS;
+ NTSTATUS Status;
SIZE_T ResultLength = 0;
KPROCESSOR_MODE PreviousMode;
WCHAR ModuleFileNameBuffer[MAX_PATH] = {0};
UNICODE_STRING ModuleFileName;
PMEMORY_SECTION_NAME SectionName = NULL;
+ PEPROCESS Process;
union
{
MEMORY_BASIC_INFORMATION BasicInfo;
PreviousMode = ExGetPreviousMode();
- if (PreviousMode != KernelMode && UnsafeResultLength != NULL)
+ if (PreviousMode != KernelMode)
{
_SEH2_TRY
{
- ProbeForWriteSize_t(UnsafeResultLength);
+ ProbeForWrite(VirtualMemoryInformation,
+ Length,
+ sizeof(ULONG_PTR));
+
+ if (UnsafeResultLength) ProbeForWriteSize_t(UnsafeResultLength);
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
- Status = _SEH2_GetExceptionCode();
+ /* Return the exception code */
+ _SEH2_YIELD(return _SEH2_GetExceptionCode());
}
_SEH2_END;
-
- if (!NT_SUCCESS(Status))
- {
- return Status;
- }
}
if (Address >= MmSystemRangeStart)
/* FIXME: Move this inside MiQueryVirtualMemory */
if (VirtualMemoryInformationClass == MemorySectionName)
{
+ Status = ObReferenceObjectByHandle(ProcessHandle,
+ PROCESS_QUERY_INFORMATION,
+ NULL,
+ PreviousMode,
+ (PVOID*)(&Process),
+ NULL);
+
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT("NtQueryVirtualMemory() = %x\n",Status);
+ return(Status);
+ }
+
RtlInitEmptyUnicodeString(&ModuleFileName, ModuleFileNameBuffer, sizeof(ModuleFileNameBuffer));
Status = MmGetFileNameForAddress(Address, &ModuleFileName);
}
}
}
+ ObDereferenceObject(Process);
return Status;
}
else
return(Status);
}
-NTSTATUS
-NTAPI
-NtLockVirtualMemory(IN HANDLE ProcessHandle,
- IN PVOID BaseAddress,
- IN SIZE_T NumberOfBytesToLock,
- OUT PSIZE_T NumberOfBytesLocked OPTIONAL)
-{
- UNIMPLEMENTED;
- if (NumberOfBytesLocked) *NumberOfBytesLocked = 0;
- return STATUS_SUCCESS;
-}
-
-NTSTATUS
-NTAPI
-NtUnlockVirtualMemory(IN HANDLE ProcessHandle,
- IN PVOID BaseAddress,
- IN SIZE_T NumberOfBytesToUnlock,
- OUT PSIZE_T NumberOfBytesUnlocked OPTIONAL)
-{
- UNIMPLEMENTED;
- if (NumberOfBytesUnlocked) *NumberOfBytesUnlocked = 0;
- return STATUS_SUCCESS;
-}
-
-NTSTATUS
-NTAPI
-NtFlushVirtualMemory(IN HANDLE ProcessHandle,
- IN OUT PVOID *BaseAddress,
- IN OUT PSIZE_T NumberOfBytesToFlush,
- OUT PIO_STATUS_BLOCK IoStatusBlock)
-{
- UNIMPLEMENTED;
- return STATUS_SUCCESS;
-}
-
/* EOF */
projects / reactos.git / blobdiff