--- mstools/h/ntsdexts.h	2018/08/09 18:20:01	1.1.1.1
+++ mstools/h/ntsdexts.h	2018/08/09 18:21:04	1.1.1.2
@@ -9,7 +9,7 @@ Module Name:
 Abstract:
 
     This file contains procedure prototypes and structures
-    needed to write NTSD debugger extensions.
+    needed to write NTSD and KD debugger extensions.
 
 Author:
 
@@ -83,4 +83,103 @@ VOID
     LPSTR lpArgumentString
     );
 
+//
+// Kernel debugger extension APIs
+//
+
+typedef
+VOID
+#ifdef i386
+cdecl
+#endif // i386
+(*PNTKD_OUTPUT_ROUTINE)(
+    char *,
+    ...
+    );
+
+typedef
+DWORD
+(*PNTKD_GET_EXPRESSION)(
+    char *
+    );
+
+typedef
+VOID
+(*PNTKD_GET_SYMBOL)(
+    LPVOID offset,
+    PUCHAR pchBuffer,
+    LPDWORD pDisplacement
+    );
+
+typedef
+DWORD
+(*PNTKD_DISASM)(
+    LPDWORD lpOffset,
+    LPSTR lpBuffer,
+    BOOL fShowEfeectiveAddress
+    );
+
+typedef
+BOOL
+(*PNTKD_CHECK_CONTROL_C)(
+    VOID
+    );
+
+typedef
+BOOL
+(*PNTKD_READ_VIRTUAL_MEMORY)(
+    LPVOID address,
+    LPVOID buffer,
+    ULONG count,
+    PULONG bytesread
+    );
+
+typedef
+BOOL
+(*PNTKD_WRITE_VIRTUAL_MEMORY)(
+    LPVOID address,
+    LPVOID buffer,
+    ULONG count,
+    PULONG byteswritten
+    );
+
+typedef
+BOOL
+(*PNTKD_READ_PHYSICAL_MEMORY)(
+    PHYSICAL_ADDRESS address,
+    LPVOID buffer,
+    ULONG count,
+    PULONG bytesread
+    );
+
+typedef
+BOOL
+(*PNTKD_WRITE_PHYSICAL_MEMORY)(
+    PHYSICAL_ADDRESS address,
+    LPVOID buffer,
+    ULONG length,
+    PULONG byteswritten
+    );
+
+typedef struct _NTKD_EXTENSION_APIS {
+    DWORD nSize;
+    PNTKD_OUTPUT_ROUTINE lpOutputRoutine;
+    PNTKD_GET_EXPRESSION lpGetExpressionRoutine;
+    PNTKD_GET_SYMBOL lpGetSymbolRoutine;
+    PNTKD_DISASM lpDisasmRoutine;
+    PNTKD_CHECK_CONTROL_C lpCheckControlCRoutine;
+    PNTKD_READ_VIRTUAL_MEMORY lpReadVirtualMemRoutine;
+    PNTKD_WRITE_VIRTUAL_MEMORY lpWriteVirtualMemRoutine;
+    PNTKD_READ_PHYSICAL_MEMORY lpReadPhysicalMemRoutine;
+    PNTKD_WRITE_PHYSICAL_MEMORY lpWritePhysicalMemRoutine;
+} NTKD_EXTENSION_APIS, *PNTKD_EXTENSION_APIS;
+
+typedef
+VOID
+(*PNTKD_EXTENSION_ROUTINE)(
+    DWORD dwCurrentPc,
+    PNTKD_EXTENSION_APIS lpExtensionApis,
+    LPSTR lpArgumentString
+    );
+
 #endif // _NTSDEXTNS_