diff --git a/sdk/xtdk/xtstatus.h b/sdk/xtdk/xtstatus.h
index f61d7aa..7f450d1 100644
--- a/sdk/xtdk/xtstatus.h
+++ b/sdk/xtdk/xtstatus.h
@@ -48,7 +48,9 @@
 
 /* XT status code definitions */
 #define STATUS_SUCCESS                                                     ((XTSTATUS) 0x00000000L)
+#define STATUS_NOT_IMPLEMENTED                                             ((XTSTATUS) 0xC0000002L)
 #define STATUS_INVALID_PARAMETER                                           ((XTSTATUS) 0xC000000DL)
+#define STATUS_INSUFFICIENT_RESOURCES                                      ((XTSTATUS) 0xC000009AL)
 #define STATUS_DEVICE_NOT_READY                                            ((XTSTATUS) 0xC00000A3L)
 #define STATUS_IO_DEVICE_ERROR                                             ((XTSTATUS) 0xC0000185L)
 #define STATUS_NOT_FOUND                                                   ((XTSTATUS) 0xC0000225L)
diff --git a/xtoskrnl/CMakeLists.txt b/xtoskrnl/CMakeLists.txt
index e5916f5..c7c9867 100644
--- a/xtoskrnl/CMakeLists.txt
+++ b/xtoskrnl/CMakeLists.txt
@@ -20,6 +20,7 @@ list(APPEND XTOSKRNL_SOURCE
     ${XTOSKRNL_SOURCE_DIR}/ke/krnlinit.c
     ${XTOSKRNL_SOURCE_DIR}/ke/${ARCH}/krnlinit.c
     ${XTOSKRNL_SOURCE_DIR}/ke/${ARCH}/proc.c
+    ${XTOSKRNL_SOURCE_DIR}/mm/kpools.c
     ${XTOSKRNL_SOURCE_DIR}/rtl/atomic.c
     ${XTOSKRNL_SOURCE_DIR}/rtl/byteswap.c
     ${XTOSKRNL_SOURCE_DIR}/rtl/memory.c
diff --git a/xtoskrnl/mm/kpools.c b/xtoskrnl/mm/kpools.c
new file mode 100644
index 0000000..d172bc2
--- /dev/null
+++ b/xtoskrnl/mm/kpools.c
@@ -0,0 +1,57 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            xtoskrnl/mm/kpools.c
+ * DESCRIPTION:     Kernel pool memory management
+ * DEVELOPERS:      Rafal Kupiec <belliash@codingworkshop.eu.org>
+ */
+
+#include <xtos.h>
+
+
+/**
+ * Allocates a new kernel stack.
+ *
+ * @param Stack
+ *        Supplies a pointer to the memory area that will contain a new kernel stack.
+ *
+ * @param LargeStack
+ *        Determines whether the stack is large or small.
+ *
+ * @param SystemNode
+ *        Specifies a preferred node used for new stack on multi-processor systems.
+ *
+ * @return This routine returns a status code.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+XTSTATUS
+MmAllocateKernelStack(IN PVOID *Stack,
+                      IN BOOLEAN LargeStack,
+                      IN UCHAR SystemNode)
+{
+    UNIMPLEMENTED;
+    return STATUS_NOT_IMPLEMENTED;
+}
+
+/**
+ * Destroys a kernel stack and frees page table entry.
+ *
+ * @param Stack
+ *        Supplies a pointer to the memory area containing a kernel stack.
+ *
+ * @param LargeStack
+ *        Determines whether the stack is large or small.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+VOID
+MmFreeKernelStack(IN PVOID Stack,
+                  IN BOOLEAN LargeStack)
+{
+    UNIMPLEMENTED;
+}