can use DWARF_ALT_FRAME_RETURN_COLUMN defined below. This is just the same
as the default definition in dwarf2out.cc. */
#undef DWARF_FRAME_REGNUM
-#define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG)
+#define DWARF_FRAME_REGNUM(REG) DEBUGGER_REGNO (REG)
/* Before the prologue, RA lives in $26. */
#define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (Pmode, 26)