1 files changed, 17 insertions, 6 deletions
diff --git a/win/tclWinInt.h b/win/tclWinInt.h
index 22ad8e9..c7066bb 100644
--- a/win/tclWinInt.h
+++ b/win/tclWinInt.h
@@ -14,6 +14,23 @@
 
 #include "tclInt.h"
 
+#ifdef HAVE_NO_SEH
+/*
+ * Unlike Borland and Microsoft, we don't register exception handlers by
+ * pushing registration records onto the runtime stack. Instead, we register
+ * them by creating an TCLEXCEPTION_REGISTRATION within the activation record.
+ */
+
+typedef struct TCLEXCEPTION_REGISTRATION {
+    struct TCLEXCEPTION_REGISTRATION *link;
+    EXCEPTION_DISPOSITION (*handler)(
+	    struct _EXCEPTION_RECORD*, void*, struct _CONTEXT*, void*);
+    void *ebp;
+    void *esp;
+    int status;
+} TCLEXCEPTION_REGISTRATION;
+#endif
+
 /*
  * Some versions of Borland C have a define for the OSVERSIONINFO for
  * Win32s and for NT, but not for Windows 95.
@@ -33,12 +50,6 @@
 #         define TCL_I_MODIFIER        ""
 #endif
 
-#ifdef _WIN64
-#         define TCL_I_MODIFIER        "I"
-#else
-#         define TCL_I_MODIFIER        ""
-#endif
-
 /*
  * Declarations of functions that are not accessible by way of the
  * stubs table.