diff --git a/debugger/stack.c b/debugger/stack.c
new file mode 100644
index 0000000..16a4b62
--- /dev/null
+++ b/debugger/stack.c
@@ -0,0 +1,89 @@
+/*
+ * Debugger stack handling
+ *
+ * Copyright 1995 Alexandre Julliard
+ */
+
+#include <stdio.h>
+#include "windows.h"
+#include "debugger.h"
+
+
+typedef struct
+{
+    WORD bp;
+    WORD ip;
+    WORD cs;
+} FRAME16;
+
+typedef struct
+{
+    DWORD bp;
+    DWORD ip;
+    WORD cs;
+} FRAME32;
+
+
+
+/***********************************************************************
+ *           DEBUG_InfoStack
+ *
+ * Dump the top of the stack
+ */
+void DEBUG_InfoStack(void)
+{
+    fprintf(stderr,"Stack dump:\n");
+    if ((SS == WINE_DATA_SELECTOR) ||
+        (GET_SEL_FLAGS(SS) & LDT_FLAGS_32BIT))  /* 32-bit mode */
+    {
+        examine_memory( 0, ESP, 10, 'x' );
+    }
+    else  /* 16-bit mode */
+    {
+        examine_memory( SS, SP, 10, 'w' );
+    }
+    fprintf(stderr,"\n");
+}
+
+
+/***********************************************************************
+ *           DEBUG_BackTrace
+ *
+ * Display a stack back-trace.
+ */
+void DEBUG_BackTrace(void)
+{
+  int frameno = 0;
+
+  fprintf(stderr,"Backtrace:\n");
+  if (SS == WINE_DATA_SELECTOR)  /* 32-bit mode */
+  {
+      FRAME32 *frame = (FRAME32 *)EBP;
+      while (frame->ip)
+      {
+          fprintf(stderr,"%d ",frameno++);
+          print_address( 0, frame->ip, 32 );
+          fprintf( stderr, "\n" );
+          frame = (FRAME32 *)frame->bp;
+      }
+  }
+  else  /* 16-bit mode */
+  {
+      FRAME16 *frame = (FRAME16 *)PTR_SEG_OFF_TO_LIN( SS, BP & ~1 );
+      WORD cs = CS;
+      if (GET_SEL_FLAGS(SS) & LDT_FLAGS_32BIT)
+      {
+          fprintf( stderr, "Not implemented: 32-bit backtrace on a different stack segment.\n" );
+          return;
+      }
+      while (frame->bp)
+      {
+          if (frame->bp & 1) cs = frame->cs;
+          fprintf( stderr,"%d ", frameno++ );
+          print_address( cs, frame->ip, 16 );
+          fprintf( stderr, "\n" );
+          frame = (FRAME16 *)PTR_SEG_OFF_TO_LIN( SS, frame->bp & ~1 );
+      }
+  }
+  fprintf( stderr, "\n" );
+}