install EH code

From-SVN: r12568

gcc/config/rs6000/rs6000.h

@@ -2310,6 +2310,13 @@ extern int rs6000_trunc_used;
 
 #define READONLY_DATA_SECTION read_only_data_section
 
+
+/* Define the name of the section to use for the exception tables.
+   TODO: test and see if we can use read_only_data_section, if so,
+   remove this.  */
+
+#define EXCEPTION_SECTION data_section
+
 /* If we are referencing a function that is static or is known to be
    in this file, make the SYMBOL_REF special.  We can use this to indicate
    that we can branch to this function without emitting a no-op after the

gcc/config/sparc/sparc.h

@@ -895,7 +895,7 @@ extern int sparc_mode_class[];
 #define FRAME_POINTER_REGNUM 30
 
 #if 0
-/* Register that is used for the return address.  */
+/* Register that is used for the return address for the flat model.  */
 #define RETURN_ADDR_REGNUM 15
 #endif
 
@@ -2168,6 +2168,8 @@ extern struct rtx_def *sparc_builtin_saveregs ();
    ? gen_rtx (REG, Pmode, 31)			\
    : gen_rtx (MEM, Pmode,			\
 	      memory_address (Pmode, plus_constant (frame, 15 * UNITS_PER_WORD))))
+
+#define DOESNT_NEED_UNWINDER (! TARGET_FLAT)
 
 /* Addressing modes, and classification of registers for them.  */
 

gcc/config/sparc/sparc.md

@@ -5392,7 +5392,8 @@
   [(set_attr "type" "multi")])
 
 (define_insn "return"
-  [(return)]
+  [(return)
+   (use (reg:SI 31))]
   "! TARGET_EPILOGUE"
   "* return output_return (operands);"
   [(set_attr "type" "multi")])

gcc/config/vax/vax.h

@@ -566,7 +566,9 @@ gen_rtx (PLUS, Pmode, frame, gen_rtx (CONST_INT, VOIDmode, 12))
    can ignore COUNT.  */
 
 #define RETURN_ADDR_RTX(COUNT, FRAME)	\
-  gen_rtx (MEM, Pmode, plus_constant (FRAME, RETURN_ADDRESS_OFFSET))
+  ((COUNT == 0)				\
+   ? gen_rtx (MEM, Pmode, plus_constant (FRAME, RETURN_ADDRESS_OFFSET)) \
+   : (rtx) 0)
 
 
 /* Addressing modes, and classification of registers for them.  */