ntdll: Add stub for NtSystemDebugControl.

dlls/ntdll/nt.c

@@ -1945,3 +1945,15 @@ NTSTATUS WINAPI NtAccessCheckAndAuditAlarm(PUNICODE_STRING SubsystemName, HANDLE
 
     return STATUS_NOT_IMPLEMENTED;
 }
+
+/******************************************************************************
+ *  NtSystemDebugControl   (NTDLL.@)
+ *  ZwSystemDebugControl   (NTDLL.@)
+ */
+NTSTATUS WINAPI NtSystemDebugControl(SYSDBG_COMMAND command, PVOID inbuffer, ULONG inbuflength, PVOID outbuffer,
+                                     ULONG outbuflength, PULONG retlength)
+{
+    FIXME("(%d, %p, %d, %p, %d, %p), stub\n", command, inbuffer, inbuflength, outbuffer, outbuflength, retlength);
+
+    return STATUS_NOT_IMPLEMENTED;
+}

dlls/ntdll/ntdll.spec

@@ -353,7 +353,7 @@
 @ stub NtStopProfile
 # @ stub NtSuspendProcess
 @ stdcall NtSuspendThread(long ptr)
-@ stub NtSystemDebugControl
+@ stdcall NtSystemDebugControl(long ptr long ptr long ptr)
 @ stdcall NtTerminateJobObject(long long)
 @ stdcall NtTerminateProcess(long long)
 @ stdcall NtTerminateThread(long long)
@@ -1209,7 +1209,7 @@
 @ stub ZwStopProfile
 # @ stub ZwSuspendProcess
 @ stdcall ZwSuspendThread(long ptr) NtSuspendThread
-@ stub ZwSystemDebugControl
+@ stdcall ZwSystemDebugControl(long ptr long ptr long ptr) NtSystemDebugControl
 @ stdcall ZwTerminateJobObject(long long) NtTerminateJobObject
 @ stdcall ZwTerminateProcess(long long) NtTerminateProcess
 @ stdcall ZwTerminateThread(long long) NtTerminateThread