install EH code

From-SVN: r12564

gcc/config/pa/pa.h

@@ -2332,3 +2332,18 @@ do { \
   for (p = __DTOR_LIST__ + 1; *p; )		\
     (*p++) ();					\
 } while (0)
+
+/* The current return address is in [%sp-20].  */
+#define RETURN_ADDR_RTX(COUNT, FRAME)						\
+  ((COUNT == 0)									\
+   ? gen_rtx (MEM, Pmode,							\
+	      memory_address (Pmode, plus_constant (FRAME,			\
+						    5 * UNITS_PER_WORD)))	\
+   : (rtx) 0)
+
+/* Used to mask out junk bits from the return address, such as
+   processor state, interrupt status, condition codes and the like.  */
+#define MASK_RETURN_ADDR \
+  /* The priviledge level is in the two low order bits, mask em out	\
+     of the return address.  */						\
+  (GEN_INT (0xfffffffc))