new file mode 100644
--- /dev/null
+++ b/packages/kernel/current/include/stackmon.hxx
@@ -0,0 +1,155 @@
+#ifndef CYGONCE_KERNEL_TESTS_STACKMON_H
+#define CYGONCE_KERNEL_TESTS_STACKMON_H
+
+/*=================================================================
+//
+//        stackmon.h
+//
+//        Auxiliary test header file
+//
+//==========================================================================
+//####COPYRIGHTBEGIN####
+//
+// -------------------------------------------
+// The contents of this file are subject to the Cygnus eCos Public License
+// Version 1.0 (the "License"); you may not use this file except in
+// compliance with the License.  You may obtain a copy of the License at
+// http://sourceware.cygnus.com/ecos
+// 
+// Software distributed under the License is distributed on an "AS IS"
+// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the
+// License for the specific language governing rights and limitations under
+// the License.
+// 
+// The Original Code is eCos - Embedded Cygnus Operating System, released
+// September 30, 1998.
+// 
+// The Initial Developer of the Original Code is Cygnus.  Portions created
+// by Cygnus are Copyright (C) 1998,1999 Cygnus Solutions.  All Rights Reserved.
+// -------------------------------------------
+//
+//####COPYRIGHTEND####
+//==========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):     hmt
+// Contributors:  hmt
+// Date:          1999-05-20
+// Description:
+//     Defines some convenience functions for stack use output.
+//
+//####DESCRIPTIONEND####
+*/
+
+#include <pkgconf/system.h>
+#include <pkgconf/hal.h>
+#include <cyg/hal/hal_arch.h>
+#include <cyg/hal/hal_intr.h>
+#ifdef CYGPKG_KERNEL
+#include <pkgconf/kernel.h>
+#include <cyg/kernel/sched.hxx>
+#include <cyg/kernel/thread.hxx>
+#include <cyg/kernel/thread.inl>
+#endif
+
+#ifndef STACKMON_PRINTF
+externC void diag_printf(const char *, ...);
+#define STACKMON_PRINTF diag_printf
+#endif
+
+// ------------------------------------------------------------------------
+// Utility function for actually counting a stack
+
+inline void cyg_test_size_a_stack( char *comment, char *format,
+                                   char *base, char *top )
+{
+    register char *p;
+    for ( p = base; p < top; p++ )
+        if ( *p )
+            break;
+    STACKMON_PRINTF( format, comment, top - p, top - base );
+}
+
+// ------------------------------------------------------------------------
+
+inline void cyg_test_dump_stack_stats( char *comment,
+                                       char *base, char *top )
+{
+    cyg_test_size_a_stack( comment, "%31s : stack used %5d size %5d\n",
+                           base, top );
+}
+
+// ------------------------------------------------------------------------
+
+inline void cyg_test_dump_thread_stack_stats( char *comment,
+                                              Cyg_Thread *p )
+{
+    char *base, *top;
+    base = (char *)p->get_stack_base();
+    top =   base + p->get_stack_size();
+    cyg_test_dump_stack_stats( comment, base, top );
+}
+
+// ------------------------------------------------------------------------
+// Print out size of idle thread stack usage since start-of-time.  Only
+// meaningful if there is a scheduler.
+
+inline void cyg_test_dump_idlethread_stack_stats( char *comment )
+{
+#ifdef CYGPKG_KERNEL
+    extern Cyg_Thread idle_thread;
+    // idle thread is not really a plain CygThread; danger.
+    char *ibase  = (char *)idle_thread.get_stack_base();
+    char *istack = ibase + idle_thread.get_stack_size();
+    cyg_test_size_a_stack( comment,
+              "%20s : Idlethread stack used %5d size %5d\n",
+              ibase, istack );
+#endif
+}
+
+// ------------------------------------------------------------------------
+// Print out size of interrupt stack usage since start-of-time or since it
+// was last cleared.  NB on some architectures and configurations, the
+// interrupt stack is the same as the bootup stack, so clear it in the
+// first first thread to execute.  Clearing it before scheduler start would
+// be fatal!
+
+inline void cyg_test_dump_interrupt_stack_stats( char *comment )
+{
+#ifdef CYGIMP_HAL_COMMON_INTERRUPTS_USE_INTERRUPT_STACK
+#ifdef HAL_INTERRUPT_STACK_BASE
+#ifdef HAL_INTERRUPT_STACK_TOP
+    extern char HAL_INTERRUPT_STACK_BASE[];
+    extern char HAL_INTERRUPT_STACK_TOP[];
+    cyg_test_size_a_stack( comment,
+              "%20s :  Interrupt stack used %5d size %5d\n",
+              HAL_INTERRUPT_STACK_BASE, HAL_INTERRUPT_STACK_TOP );
+#endif
+#endif
+#endif
+}
+
+// Clear interrupt stack to reset stats - only after sched has started.
+inline void cyg_test_clear_interrupt_stack( void )
+{
+#ifdef CYGIMP_HAL_COMMON_INTERRUPTS_USE_INTERRUPT_STACK
+#ifdef HAL_INTERRUPT_STACK_BASE
+#ifdef HAL_INTERRUPT_STACK_TOP
+    cyg_uint32  old_intr;
+    extern char HAL_INTERRUPT_STACK_BASE[];
+    extern char HAL_INTERRUPT_STACK_TOP[];
+    register char *p;
+    HAL_DISABLE_INTERRUPTS(old_intr);
+    for ( p = HAL_INTERRUPT_STACK_BASE; p < HAL_INTERRUPT_STACK_TOP; p++ )
+        *p = 0;                         // zero it for checking later
+    HAL_RESTORE_INTERRUPTS(old_intr);
+#endif
+#endif
+#endif
+}
+
+// ------------------------------------------------------------------------
+
+#endif // ifndef CYGONCE_KERNEL_TESTS_STACKMON_H
+
+// EOF stackmon.h