pr-support.c (__gnu_unwind_24bit): Correct logic for the case where B3 isn't the return register.

	* config/c6x/pr-support.c (__gnu_unwind_24bit): Correct logic for the
	case where B3 isn't the return register.

From-SVN: r180434

libgcc/ChangeLog

+2011-10-25  Bernd Schmidt  <bernds@codesourcery.com>
+
+	* config/c6x/pr-support.c (__gnu_unwind_24bit): Correct logic for the
+	case where B3 isn't the return register.
+
 2011-10-25  Andreas Tobler  <andreast@fgznet.ch>
 
 	* config/rs6000/t-freebsd: Add wildcard.

libgcc/config/c6x/pr-support.c

@@ -273,6 +273,14 @@ __gnu_unwind_24bit (_Unwind_Context * context, _uw data, int compact)
   _uw mask;
   _uw *ptr;
   _uw tmp;
+  int ret_reg = unwind_frame_regs[data & 0xf];
+
+  if (ret_reg != R_B3)
+    {
+      _Unwind_VRS_Get (context, _UVRSC_CORE, unwind_frame_regs[data & 0xf],
+		       _UVRSD_UINT32, &tmp);
+      _Unwind_VRS_Set (context, _UVRSC_CORE, R_B3, _UVRSD_UINT32, &tmp);
+    }
 
   mask = (data >> 4) & 0x1fff;
 
@@ -291,8 +299,7 @@ __gnu_unwind_24bit (_Unwind_Context * context, _uw data, int compact)
   else
     pop_frame (context, mask, ptr, offset != 0x7f);
 
-  _Unwind_VRS_Get (context, _UVRSC_CORE, unwind_frame_regs[data & 0xf],
-		   _UVRSD_UINT32, &tmp);
+  _Unwind_VRS_Get (context, _UVRSC_CORE, R_B3, _UVRSD_UINT32, &tmp);
   _Unwind_VRS_Set (context, _UVRSC_CORE, R_PC, _UVRSD_UINT32, &tmp);
 
   return _URC_OK;