* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
-/* $Id: virtual.c,v 1.63 2002/09/07 15:13:03 chorns Exp $
+/* $Id: virtual.c,v 1.86 2004/12/22 05:17:44 royce Exp $
*
* PROJECT: ReactOS kernel
* FILE: ntoskrnl/mm/virtual.c
* PURPOSE: Implementing operations on virtual memory.
* PROGRAMMER: David Welch
*/
-
+
/* INCLUDE *****************************************************************/
#include <ntoskrnl.h>
/* FUNCTIONS *****************************************************************/
-NTSTATUS STDCALL
-NtFlushVirtualMemory(IN HANDLE ProcessHandle,
- IN PVOID BaseAddress,
- IN ULONG NumberOfBytesToFlush,
- OUT PULONG NumberOfBytesFlushed OPTIONAL)
+NTSTATUS STDCALL
+NtFlushVirtualMemory(IN HANDLE ProcessHandle,
+ IN PVOID BaseAddress,
+ IN ULONG NumberOfBytesToFlush,
+ OUT PULONG NumberOfBytesFlushed OPTIONAL)
/*
* FUNCTION: Flushes virtual memory to file
* ARGUMENTS:
- * ProcessHandle = Points to the process that allocated the virtual
+ * ProcessHandle = Points to the process that allocated the virtual
* memory
* BaseAddress = Points to the memory address
* NumberOfBytesToFlush = Limits the range to flush,
* NumberOfBytesFlushed = Actual number of bytes flushed
- * RETURNS: Status
+ * RETURNS: Status
*/
{
- UNIMPLEMENTED;
+ UNIMPLEMENTED;
+ return(STATUS_NOT_IMPLEMENTED);
}
-NTSTATUS STDCALL
-NtLockVirtualMemory(HANDLE ProcessHandle,
- PVOID BaseAddress,
- ULONG NumberOfBytesToLock,
- PULONG NumberOfBytesLocked)
+
+NTSTATUS STDCALL
+MiLockVirtualMemory(HANDLE ProcessHandle,
+ PVOID BaseAddress,
+ ULONG NumberOfBytesToLock,
+ PULONG NumberOfBytesLocked,
+ PObReferenceObjectByHandle pObReferenceObjectByHandle,
+ PMmCreateMdl pMmCreateMdl,
+ PObDereferenceObject pObDereferenceObject,
+ PMmProbeAndLockPages pMmProbeAndLockPages,
+ PExFreePool pExFreePool)
{
- UNIMPLEMENTED;
+ PEPROCESS Process;
+ NTSTATUS Status;
+ PMDL Mdl;
+
+ Status = pObReferenceObjectByHandle(ProcessHandle,
+ PROCESS_VM_WRITE,
+ NULL,
+ UserMode,
+ (PVOID*)(&Process),
+ NULL);
+ if (!NT_SUCCESS(Status))
+ return(Status);
+
+ Mdl = pMmCreateMdl(NULL,
+ BaseAddress,
+ NumberOfBytesToLock);
+ if (Mdl == NULL)
+ {
+ pObDereferenceObject(Process);
+ return(STATUS_NO_MEMORY);
+ }
+
+ pMmProbeAndLockPages(Mdl,
+ UserMode,
+ IoWriteAccess);
+
+ pExFreePool(Mdl);
+
+ pObDereferenceObject(Process);
+
+ *NumberOfBytesLocked = NumberOfBytesToLock;
+ return(STATUS_SUCCESS);
}
-NTSTATUS STDCALL
-NtQueryVirtualMemory (IN HANDLE ProcessHandle,
- IN PVOID Address,
- IN CINT VirtualMemoryInformationClass,
- OUT PVOID VirtualMemoryInformation,
- IN ULONG Length,
- OUT PULONG UnsafeResultLength)
+
+NTSTATUS STDCALL
+NtLockVirtualMemory(HANDLE ProcessHandle,
+ PVOID BaseAddress,
+ ULONG NumberOfBytesToLock,
+ PULONG NumberOfBytesLocked)
+{
+ DPRINT("NtLockVirtualMemory(ProcessHandle %x, BaseAddress %x, "
+ "NumberOfBytesToLock %d, NumberOfBytesLocked %x)\n",
+ ProcessHandle,
+ BaseAddress,
+ NumberOfBytesToLock,
+ NumberOfBytesLocked);
+
+ return MiLockVirtualMemory(ProcessHandle,
+ BaseAddress,
+ NumberOfBytesToLock,
+ NumberOfBytesLocked,
+ ObReferenceObjectByHandle,
+ MmCreateMdl,
+ ObfDereferenceObject,
+ MmProbeAndLockPages,
+ ExFreePool);
+}
+
+
+NTSTATUS FASTCALL
+MiQueryVirtualMemory (IN HANDLE ProcessHandle,
+ IN PVOID Address,
+ IN CINT VirtualMemoryInformationClass,
+ OUT PVOID VirtualMemoryInformation,
+ IN ULONG Length,
+ OUT PULONG ResultLength)
{
NTSTATUS Status;
PEPROCESS Process;
MEMORY_AREA* MemoryArea;
- ULONG ResultLength = 0;
PMADDRESS_SPACE AddressSpace;
-
+
+ if (Address < (PVOID)KERNEL_BASE)
+ {
+ Status = ObReferenceObjectByHandle(ProcessHandle,
+ PROCESS_QUERY_INFORMATION,
+ NULL,
+ UserMode,
+ (PVOID*)(&Process),
+ NULL);
+
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT("NtQueryVirtualMemory() = %x\n",Status);
+ return(Status);
+ }
+ AddressSpace = &Process->AddressSpace;
+ }
+ else
+ {
+ AddressSpace = MmGetKernelAddressSpace();
+ }
+ MmLockAddressSpace(AddressSpace);
+ MemoryArea = MmOpenMemoryAreaByAddress(AddressSpace,
+ Address);
+ switch(VirtualMemoryInformationClass)
+ {
+ case MemoryBasicInformation:
+ {
+ PMEMORY_BASIC_INFORMATION Info =
+ (PMEMORY_BASIC_INFORMATION)VirtualMemoryInformation;
+ if (Length != sizeof(MEMORY_BASIC_INFORMATION))
+ {
+ MmUnlockAddressSpace(AddressSpace);
+ ObDereferenceObject(Process);
+ return(STATUS_INFO_LENGTH_MISMATCH);
+ }
+
+ if (MemoryArea == NULL)
+ {
+ Info->Type = 0;
+ Info->State = MEM_FREE;
+ Info->Protect = PAGE_NOACCESS;
+ Info->AllocationProtect = 0;
+ Info->BaseAddress = (PVOID)PAGE_ROUND_DOWN(Address);
+ Info->AllocationBase = NULL;
+ Info->RegionSize = MmFindGapAtAddress(AddressSpace, Info->BaseAddress);
+ Status = STATUS_SUCCESS;
+ *ResultLength = sizeof(MEMORY_BASIC_INFORMATION);
+ }
+ else
+ {
+ switch(MemoryArea->Type)
+ {
+ case MEMORY_AREA_VIRTUAL_MEMORY:
+ Status = MmQueryAnonMem(MemoryArea, Address, Info,
+ ResultLength);
+ break;
+ case MEMORY_AREA_SECTION_VIEW:
+ Status = MmQuerySectionView(MemoryArea, Address, Info,
+ ResultLength);
+ break;
+ case MEMORY_AREA_NO_ACCESS:
+ Info->Type = 0;
+ Info->State = MEM_FREE;
+ Info->Protect = MemoryArea->Attributes;
+ Info->AllocationProtect = MemoryArea->Attributes;
+ Info->BaseAddress = MemoryArea->BaseAddress;
+ Info->AllocationBase = MemoryArea->BaseAddress;
+ Info->RegionSize = MemoryArea->Length;
+ Status = STATUS_SUCCESS;
+ *ResultLength = sizeof(MEMORY_BASIC_INFORMATION);
+ break;
+ case MEMORY_AREA_SHARED_DATA:
+ Info->Type = 0;
+ Info->State = MEM_COMMIT;
+ Info->Protect = MemoryArea->Attributes;
+ Info->AllocationProtect = MemoryArea->Attributes;
+ Info->BaseAddress = MemoryArea->BaseAddress;
+ Info->AllocationBase = MemoryArea->BaseAddress;
+ Info->RegionSize = MemoryArea->Length;
+ Status = STATUS_SUCCESS;
+ *ResultLength = sizeof(MEMORY_BASIC_INFORMATION);
+ break;
+ case MEMORY_AREA_SYSTEM:
+ {
+ static int warned = 0;
+ if ( !warned )
+ {
+ DPRINT1("FIXME: MEMORY_AREA_SYSTEM case incomplete (or possibly wrong) for NtQueryVirtualMemory()\n");
+ warned = 1;
+ }
+ }
+ /* FIXME - don't have a clue if this is right, but it's better than nothing */
+ Info->Type = 0;
+ Info->State = MEM_COMMIT;
+ Info->Protect = MemoryArea->Attributes;
+ Info->AllocationProtect = MemoryArea->Attributes;
+ Info->BaseAddress = MemoryArea->BaseAddress;
+ Info->AllocationBase = MemoryArea->BaseAddress;
+ Info->RegionSize = MemoryArea->Length;
+ Status = STATUS_SUCCESS;
+ *ResultLength = sizeof(MEMORY_BASIC_INFORMATION);
+ break;
+ case MEMORY_AREA_KERNEL_STACK:
+ {
+ static int warned = 0;
+ if ( !warned )
+ {
+ DPRINT1("FIXME: MEMORY_AREA_KERNEL_STACK case incomplete (or possibly wrong) for NtQueryVirtualMemory()\n");
+ warned = 1;
+ }
+ }
+ /* FIXME - don't have a clue if this is right, but it's better than nothing */
+ Info->Type = 0;
+ Info->State = MEM_COMMIT;
+ Info->Protect = MemoryArea->Attributes;
+ Info->AllocationProtect = MemoryArea->Attributes;
+ Info->BaseAddress = MemoryArea->BaseAddress;
+ Info->AllocationBase = MemoryArea->BaseAddress;
+ Info->RegionSize = MemoryArea->Length;
+ Status = STATUS_SUCCESS;
+ *ResultLength = sizeof(MEMORY_BASIC_INFORMATION);
+ break;
+ default:
+ DPRINT1("unhandled memory area type: 0x%x\n", MemoryArea->Type);
+ Status = STATUS_UNSUCCESSFUL;
+ *ResultLength = 0;
+ }
+ }
+ break;
+ }
+
+ default:
+ {
+ Status = STATUS_INVALID_INFO_CLASS;
+ *ResultLength = 0;
+ break;
+ }
+ }
+
+ MmUnlockAddressSpace(AddressSpace);
+ if (Address < (PVOID)KERNEL_BASE)
+ {
+ ObDereferenceObject(Process);
+ }
+
+ return Status;
+}
+
+/* (tMk 2004.II.4)
+ * FUNCTION:
+ * Called from VirtualQueryEx (lib\kernel32\mem\virtual.c)
+ *
+ */
+NTSTATUS STDCALL
+NtQueryVirtualMemory (IN HANDLE ProcessHandle,
+ IN PVOID Address,
+ IN CINT VirtualMemoryInformationClass,
+ OUT PVOID VirtualMemoryInformation,
+ IN ULONG Length,
+ OUT PULONG UnsafeResultLength)
+{
+ NTSTATUS Status;
+ ULONG ResultLength = 0;
+ KPROCESSOR_MODE PrevMode;
+ union
+ {
+ MEMORY_BASIC_INFORMATION BasicInfo;
+ }
+ VirtualMemoryInfo;
+
DPRINT("NtQueryVirtualMemory(ProcessHandle %x, Address %x, "
"VirtualMemoryInformationClass %d, VirtualMemoryInformation %x, "
"Length %lu ResultLength %x)\n",ProcessHandle,Address,
VirtualMemoryInformationClass,VirtualMemoryInformation,
Length,ResultLength);
-
- Status = ObReferenceObjectByHandle(ProcessHandle,
- PROCESS_QUERY_INFORMATION,
- NULL,
- UserMode,
- (PVOID*)(&Process),
- NULL);
-
- if (!NT_SUCCESS(Status))
- {
- DPRINT("NtQueryVirtualMemory() = %x\n",Status);
- return(Status);
- }
-
- AddressSpace = &Process->AddressSpace;
- MmLockAddressSpace(AddressSpace);
- MemoryArea = MmOpenMemoryAreaByAddress(AddressSpace,
- Address);
- switch(VirtualMemoryInformationClass)
- {
- case MemoryBasicInformation:
- {
- PMEMORY_BASIC_INFORMATION Info =
- (PMEMORY_BASIC_INFORMATION)VirtualMemoryInformation;
-
- if (Length != sizeof(MEMORY_BASIC_INFORMATION))
- {
- ObDereferenceObject(Process);
- return(STATUS_INFO_LENGTH_MISMATCH);
- }
-
- if (MemoryArea == NULL)
- {
- Info->State = MEM_FREE;
- Info->BaseAddress = (PVOID)PAGE_ROUND_DOWN(Address);
- Status = STATUS_SUCCESS;
- ResultLength = sizeof(MEMORY_BASIC_INFORMATION);
- }
- else if (MemoryArea->Type == MEMORY_AREA_VIRTUAL_MEMORY)
- {
- Status = MmQueryAnonMem(MemoryArea, Address, Info,
- &ResultLength);
- }
- else if (MemoryArea->Type == MEMORY_AREA_SECTION_VIEW)
- {
- Status = MmQuerySectionView(MemoryArea, Address, Info,
- &ResultLength);
- }
- else
- {
- Status = STATUS_UNSUCCESSFUL;
- ResultLength = 0;
- }
- break;
- }
-
- default:
- {
- Status = STATUS_INVALID_INFO_CLASS;
- ResultLength = 0;
- break;
- }
- }
- MmUnlockAddressSpace(AddressSpace);
- ObDereferenceObject(Process);
+ PrevMode = ExGetPreviousMode();
+
+ if (PrevMode == UserMode && Address >= (PVOID)KERNEL_BASE)
+ {
+ DPRINT1("Invalid parameter\n");
+ return STATUS_INVALID_PARAMETER;
+ }
+
+ Status = MiQueryVirtualMemory ( ProcessHandle,
+ Address,
+ VirtualMemoryInformationClass,
+ &VirtualMemoryInfo,
+ Length,
+ &ResultLength );
+
+ if (NT_SUCCESS(Status) && ResultLength > 0)
+ {
+ Status = MmCopyToCaller(VirtualMemoryInformation, &VirtualMemoryInfo, ResultLength);
+ if (!NT_SUCCESS(Status))
+ {
+ ResultLength = 0;
+ }
+ }
+
if (UnsafeResultLength != NULL)
- {
- MmCopyToCaller(UnsafeResultLength, &ResultLength, sizeof(ULONG));
- }
+ {
+ MmCopyToCaller(UnsafeResultLength, &ResultLength, sizeof(ULONG));
+ }
return(Status);
}
+
+/* (tMk 2004.II.5)
+ * FUNCTION:
+ * Called from VirtualProtectEx (lib\kernel32\mem\virtual.c)
+ *
+ */
NTSTATUS STDCALL
-NtProtectVirtualMemory(IN HANDLE ProcessHandle,
- IN PVOID BaseAddress,
- IN ULONG NumberOfBytesToProtect,
- IN ULONG NewAccessProtection,
- OUT PULONG UnsafeOldAccessProtection)
+NtProtectVirtualMemory(IN HANDLE ProcessHandle,
+ IN PVOID *UnsafeBaseAddress,
+ IN ULONG *UnsafeNumberOfBytesToProtect,
+ IN ULONG NewAccessProtection,
+ OUT PULONG UnsafeOldAccessProtection)
{
PMEMORY_AREA MemoryArea;
PEPROCESS Process;
NTSTATUS Status;
PMADDRESS_SPACE AddressSpace;
ULONG OldAccessProtection;
+ PVOID BaseAddress;
+ ULONG NumberOfBytesToProtect;
+
+ Status = MmCopyFromCaller(&BaseAddress, UnsafeBaseAddress, sizeof(PVOID));
+ if (!NT_SUCCESS(Status))
+ return Status;
+ Status = MmCopyFromCaller(&NumberOfBytesToProtect, UnsafeNumberOfBytesToProtect, sizeof(ULONG));
+ if (!NT_SUCCESS(Status))
+ return Status;
+
+ // (tMk 2004.II.5) in Microsoft SDK I read:
+ // 'if this parameter is NULL or does not point to a valid variable, the function fails'
+ if(UnsafeOldAccessProtection == NULL)
+ {
+ return(STATUS_INVALID_PARAMETER);
+ }
NumberOfBytesToProtect =
- PAGE_ROUND_UP(BaseAddress + NumberOfBytesToProtect) -
- PAGE_ROUND_DOWN(BaseAddress);
+ PAGE_ROUND_UP(BaseAddress + NumberOfBytesToProtect) -
+ PAGE_ROUND_DOWN(BaseAddress);
BaseAddress = (PVOID)PAGE_ROUND_DOWN(BaseAddress);
-
+
Status = ObReferenceObjectByHandle(ProcessHandle,
- PROCESS_VM_OPERATION,
- PsProcessType,
- UserMode,
- (PVOID*)(&Process),
- NULL);
- if (Status != STATUS_SUCCESS)
- {
- DPRINT("NtProtectVirtualMemory() = %x\n",Status);
- return(Status);
- }
+ PROCESS_VM_OPERATION,
+ PsProcessType,
+ UserMode,
+ (PVOID*)(&Process),
+ NULL);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT("NtProtectVirtualMemory() = %x\n",Status);
+ return(Status);
+ }
AddressSpace = &Process->AddressSpace;
-
+
MmLockAddressSpace(AddressSpace);
MemoryArea = MmOpenMemoryAreaByAddress(AddressSpace,
- BaseAddress);
+ BaseAddress);
if (MemoryArea == NULL)
- {
- MmUnlockAddressSpace(AddressSpace);
- ObDereferenceObject(Process);
- return(STATUS_UNSUCCESSFUL);
- }
-
+ {
+ MmUnlockAddressSpace(AddressSpace);
+ ObDereferenceObject(Process);
+ return(STATUS_UNSUCCESSFUL);
+ }
+
if (MemoryArea->Type == MEMORY_AREA_VIRTUAL_MEMORY)
- {
- Status = MmProtectAnonMem(AddressSpace, MemoryArea, BaseAddress,
- NumberOfBytesToProtect, NewAccessProtection,
- &OldAccessProtection);
- }
+ {
+ Status = MmProtectAnonMem(AddressSpace, MemoryArea, BaseAddress,
+ NumberOfBytesToProtect, NewAccessProtection,
+ &OldAccessProtection);
+ }
else if (MemoryArea->Type == MEMORY_AREA_SECTION_VIEW)
- {
- Status = MmProtectSectionView(AddressSpace, MemoryArea, BaseAddress,
- NumberOfBytesToProtect,
- NewAccessProtection,
- &OldAccessProtection);
- }
-
+ {
+ Status = MmProtectSectionView(AddressSpace, MemoryArea, BaseAddress,
+ NumberOfBytesToProtect,
+ NewAccessProtection,
+ &OldAccessProtection);
+ }
+
MmUnlockAddressSpace(AddressSpace);
ObDereferenceObject(Process);
- MmCopyToCaller(UnsafeOldAccessProtection, &OldAccessProtection,
- sizeof(ULONG));
+ MmCopyToCaller(UnsafeOldAccessProtection, &OldAccessProtection, sizeof(ULONG));
+ MmCopyToCaller(UnsafeBaseAddress, &BaseAddress, sizeof(PVOID));
+ MmCopyToCaller(UnsafeNumberOfBytesToProtect, &NumberOfBytesToProtect, sizeof(ULONG));
return(Status);
}
-NTSTATUS STDCALL
-NtReadVirtualMemory(IN HANDLE ProcessHandle,
- IN PVOID BaseAddress,
- OUT PVOID Buffer,
- IN ULONG NumberOfBytesToRead,
- OUT PULONG NumberOfBytesRead)
+
+/* (tMk 2004.II.05)
+ * FUNCTION:
+ * Called from ReadProcessMemory (lib\kernel32\mem\procmem.c) and KlInitPeb(lib\kernel32\process\create.c)
+ *
+ * NOTE: This function will be correct if MmProbeAndLockPages() would be fully IMPLEMENTED.
+ */
+NTSTATUS STDCALL
+NtReadVirtualMemory(IN HANDLE ProcessHandle,
+ IN PVOID BaseAddress,
+ OUT PVOID Buffer,
+ IN ULONG NumberOfBytesToRead,
+ OUT PULONG NumberOfBytesRead OPTIONAL)
{
- NTSTATUS Status;
- PMDL Mdl;
- PVOID SystemAddress;
- PEPROCESS Process;
-
- DPRINT("NtReadVirtualMemory(ProcessHandle %x, BaseAddress %x, "
- "Buffer %x, NumberOfBytesToRead %d)\n",ProcessHandle,BaseAddress,
- Buffer,NumberOfBytesToRead);
-
- Status = ObReferenceObjectByHandle(ProcessHandle,
- PROCESS_VM_WRITE,
- NULL,
- UserMode,
- (PVOID*)(&Process),
- NULL);
- if (Status != STATUS_SUCCESS)
- {
+ NTSTATUS Status;
+ PMDL Mdl;
+ PVOID SystemAddress;
+ PEPROCESS Process, CurrentProcess;
+
+
+ DPRINT("NtReadVirtualMemory(ProcessHandle %x, BaseAddress %x, "
+ "Buffer %x, NumberOfBytesToRead %d)\n",ProcessHandle,BaseAddress,
+ Buffer,NumberOfBytesToRead);
+
+ Status = ObReferenceObjectByHandle(ProcessHandle,
+ PROCESS_VM_WRITE,
+ NULL,
+ UserMode,
+ (PVOID*)(&Process),
+ NULL);
+ if (!NT_SUCCESS(Status))
+ {
return(Status);
- }
-
- Mdl = MmCreateMdl(NULL,
- Buffer,
- NumberOfBytesToRead);
- MmProbeAndLockPages(Mdl,
- UserMode,
- IoWriteAccess);
-
- KeAttachProcess(Process);
-
- SystemAddress = MmGetSystemAddressForMdl(Mdl);
- memcpy(SystemAddress, BaseAddress, NumberOfBytesToRead);
-
- KeDetachProcess();
-
- if (Mdl->MappedSystemVa != NULL)
- {
- MmUnmapLockedPages(Mdl->MappedSystemVa, Mdl);
- }
- MmUnlockPages(Mdl);
- ExFreePool(Mdl);
-
- ObDereferenceObject(Process);
-
- *NumberOfBytesRead = NumberOfBytesToRead;
- return(STATUS_SUCCESS);
+ }
+
+ CurrentProcess = PsGetCurrentProcess();
+
+ if (Process == CurrentProcess)
+ {
+ memcpy(Buffer, BaseAddress, NumberOfBytesToRead);
+ }
+ else
+ {
+ Mdl = MmCreateMdl(NULL,
+ Buffer,
+ NumberOfBytesToRead);
+ if(Mdl == NULL)
+ {
+ ObDereferenceObject(Process);
+ return(STATUS_NO_MEMORY);
+ }
+ MmProbeAndLockPages(Mdl,
+ UserMode,
+ IoWriteAccess);
+
+ KeAttachProcess(&Process->Pcb);
+
+ SystemAddress = MmGetSystemAddressForMdl(Mdl);
+ memcpy(SystemAddress, BaseAddress, NumberOfBytesToRead);
+
+ KeDetachProcess();
+
+ if (Mdl->MappedSystemVa != NULL)
+ {
+ MmUnmapLockedPages(Mdl->MappedSystemVa, Mdl);
+ }
+ MmUnlockPages(Mdl);
+ ExFreePool(Mdl);
+ }
+
+ ObDereferenceObject(Process);
+
+ if (NumberOfBytesRead)
+ *NumberOfBytesRead = NumberOfBytesToRead;
+ return(STATUS_SUCCESS);
}
-NTSTATUS STDCALL
-NtUnlockVirtualMemory(HANDLE ProcessHandle,
- PVOID BaseAddress,
- ULONG NumberOfBytesToUnlock,
- PULONG NumberOfBytesUnlocked OPTIONAL)
+/* (tMk 2004.II.05)
+ * FUNCTION: THIS function doesn't make a sense...
+ * Called from VirtualUnlock (lib\kernel32\mem\virtual.c)
+ */
+NTSTATUS STDCALL
+NtUnlockVirtualMemory(HANDLE ProcessHandle,
+ PVOID BaseAddress,
+ ULONG NumberOfBytesToUnlock,
+ PULONG NumberOfBytesUnlocked OPTIONAL)
{
- UNIMPLEMENTED;
+ // AG [08-20-03] : I have *no* idea if this is correct, I just used the
+ // other functions as a template and made a few intelligent guesses...
+
+ NTSTATUS Status;
+ PMDL Mdl;
+ PEPROCESS Process;
+
+ DPRINT("NtUnlockVirtualMemory(ProcessHandle %x, BaseAddress %x, "
+ "NumberOfBytesToUnlock %d), NumberOfBytesUnlocked %x\n",ProcessHandle,BaseAddress,
+ NumberOfBytesToUnlock, NumberOfBytesUnlocked);
+
+ Status = ObReferenceObjectByHandle(ProcessHandle,
+ PROCESS_VM_WRITE,
+ NULL,
+ UserMode,
+ (PVOID*)(&Process),
+ NULL);
+ if (!NT_SUCCESS(Status))
+ {
+ return(Status);
+ }
+
+ Mdl = MmCreateMdl(NULL,
+ BaseAddress,
+ NumberOfBytesToUnlock);
+ if(Mdl == NULL)
+ {
+ ObDereferenceObject(Process);
+ return(STATUS_NO_MEMORY);
+ }
+
+ ObDereferenceObject(Process);
+
+ if (Mdl->MappedSystemVa != NULL)
+ {
+ MmUnmapLockedPages(Mdl->MappedSystemVa, Mdl);
+ }
+ MmUnlockPages(Mdl);
+ ExFreePool(Mdl);
+
+ *NumberOfBytesUnlocked = NumberOfBytesToUnlock;
+
+ return(STATUS_SUCCESS);
}
-NTSTATUS STDCALL
-NtWriteVirtualMemory(IN HANDLE ProcessHandle,
- IN PVOID BaseAddress,
- IN PVOID Buffer,
- IN ULONG NumberOfBytesToWrite,
- OUT PULONG NumberOfBytesWritten)
+/* (tMk 2004.II.05)
+ * FUNCTION:
+ * Called from WriteProcessMemory (lib\kernel32\mem\procmem.c) and KlInitPeb(lib\kernel32\process\create.c)
+ *
+ * NOTE: This function will be correct if MmProbeAndLockPages() would be fully IMPLEMENTED.
+ */
+NTSTATUS STDCALL
+NtWriteVirtualMemory(IN HANDLE ProcessHandle,
+ IN PVOID BaseAddress,
+ IN PVOID Buffer,
+ IN ULONG NumberOfBytesToWrite,
+ OUT PULONG NumberOfBytesWritten)
{
NTSTATUS Status;
PMDL Mdl;
PVOID SystemAddress;
PEPROCESS Process;
-
+
DPRINT("NtWriteVirtualMemory(ProcessHandle %x, BaseAddress %x, "
- "Buffer %x, NumberOfBytesToWrite %d)\n",ProcessHandle,BaseAddress,
- Buffer,NumberOfBytesToWrite);
-
+ "Buffer %x, NumberOfBytesToWrite %d)\n",ProcessHandle,BaseAddress,
+ Buffer,NumberOfBytesToWrite);
+
Status = ObReferenceObjectByHandle(ProcessHandle,
- PROCESS_VM_WRITE,
- NULL,
- UserMode,
- (PVOID*)(&Process),
- NULL);
- if (Status != STATUS_SUCCESS)
- {
- return(Status);
- }
-
- Mdl = MmCreateMdl(NULL,
- Buffer,
- NumberOfBytesToWrite);
- MmProbeAndLockPages(Mdl,
- UserMode,
- IoReadAccess);
-
- KeAttachProcess(Process);
-
- SystemAddress = MmGetSystemAddressForMdl(Mdl);
- memcpy(BaseAddress, SystemAddress, NumberOfBytesToWrite);
-
- KeDetachProcess();
-
+ PROCESS_VM_WRITE,
+ NULL,
+ UserMode,
+ (PVOID*)(&Process),
+ NULL);
+ if (!NT_SUCCESS(Status))
+ {
+ return(Status);
+ }
+
+ if (Process == PsGetCurrentProcess())
+ {
+ memcpy(BaseAddress, Buffer, NumberOfBytesToWrite);
+ }
+ else
+ {
+ Mdl = MmCreateMdl(NULL,
+ Buffer,
+ NumberOfBytesToWrite);
+ MmProbeAndLockPages(Mdl,
+ UserMode,
+ IoReadAccess);
+ if(Mdl == NULL)
+ {
+ ObDereferenceObject(Process);
+ return(STATUS_NO_MEMORY);
+ }
+ KeAttachProcess(&Process->Pcb);
+
+ SystemAddress = MmGetSystemAddressForMdl(Mdl);
+ memcpy(BaseAddress, SystemAddress, NumberOfBytesToWrite);
+
+ KeDetachProcess();
+
+ if (Mdl->MappedSystemVa != NULL)
+ {
+ MmUnmapLockedPages(Mdl->MappedSystemVa, Mdl);
+ }
+ MmUnlockPages(Mdl);
+ ExFreePool(Mdl);
+ }
+
ObDereferenceObject(Process);
- if (Mdl->MappedSystemVa != NULL)
- {
- MmUnmapLockedPages(Mdl->MappedSystemVa, Mdl);
- }
- MmUnlockPages(Mdl);
- ExFreePool(Mdl);
-
*NumberOfBytesWritten = NumberOfBytesToWrite;
-
+
return(STATUS_SUCCESS);
}
-HANDLE STDCALL
-MmSecureVirtualMemory (IN PVOID Address,
- IN SIZE_T Size,
- IN ULONG ProbeMode)
+/*
+ * @unimplemented
+ */
+
+PVOID
+STDCALL
+MmGetVirtualForPhysical (
+ IN PHYSICAL_ADDRESS PhysicalAddress
+ )
+{
+ UNIMPLEMENTED;
+ return 0;
+}
+
+/* FUNCTION:
+ * Called from EngSecureMem (subsys\win32k\eng\mem.c)
+ * @unimplemented
+ */
+PVOID STDCALL
+MmSecureVirtualMemory (PVOID Address,
+ SIZE_T Length,
+ ULONG Mode)
+{
+ /* Only works for user space */
+ if (MmHighestUserAddress < Address)
+ {
+ return NULL;
+ }
+
+ UNIMPLEMENTED;
+
+ return 0;
+}
+
+
+/* FUNCTION:
+ * Called from EngUnsecureMem (subsys\win32k\eng\mem.c)
+ * @unimplemented
+ */
+VOID STDCALL
+MmUnsecureVirtualMemory(PVOID SecureMem)
{
- UNIMPLEMENTED;
- return 0;
+ if (NULL == SecureMem)
+ {
+ return;
+ }
+
+ UNIMPLEMENTED;
}
+/*
+ * @implemented
+ */
VOID STDCALL
-MmUnsecureVirtualMemory (IN HANDLE SecureHandle)
+ProbeForRead (IN PVOID Address,
+ IN ULONG Length,
+ IN ULONG Alignment)
{
- UNIMPLEMENTED;
+ ASSERT(Alignment ==1 || Alignment == 2 || Alignment == 4 || Alignment == 8);
+
+ if (Length == 0)
+ return;
+
+ if (((ULONG_PTR)Address & (Alignment - 1)) != 0)
+ {
+ ExRaiseStatus (STATUS_DATATYPE_MISALIGNMENT);
+ }
+ else if ((ULONG_PTR)Address + Length < (ULONG_PTR)Address ||
+ (ULONG_PTR)Address + Length > (ULONG_PTR)MmUserProbeAddress)
+ {
+ ExRaiseStatus (STATUS_ACCESS_VIOLATION);
+ }
+}
+
+
+/*
+ * @implemented
+ */
+VOID STDCALL
+ProbeForWrite (IN PVOID Address,
+ IN ULONG Length,
+ IN ULONG Alignment)
+{
+ PULONG Ptr;
+ ULONG x;
+ ULONG i;
+
+ ASSERT(Alignment ==1 || Alignment == 2 || Alignment == 4 || Alignment == 8);
+
+ if (Length == 0)
+ return;
+
+ if (((ULONG_PTR)Address & (Alignment - 1)) != 0)
+ {
+ ExRaiseStatus (STATUS_DATATYPE_MISALIGNMENT);
+ }
+ else if ((ULONG_PTR)Address + Length < (ULONG_PTR)Address ||
+ (ULONG_PTR)Address + Length > (ULONG_PTR)MmUserProbeAddress)
+ {
+ ExRaiseStatus (STATUS_ACCESS_VIOLATION);
+ }
+
+ /* Check for accessible pages */
+ for (i = 0; i < Length; i += PAGE_SIZE)
+ {
+ Ptr = (PULONG)(((ULONG_PTR)Address & ~(PAGE_SIZE - 1)) + i);
+ x = *Ptr;
+ *Ptr = x;
+ }
}
/* EOF */
projects / reactos.git / blobdiff