fn getRegDefaultValue(reg_number: u8, context: *std.dwarf.UnwindContext, out: []u8) !void

Returns the ABI-defined default value this register has in the unwinding table before running any of the CIE instructions. The DWARF spec defines these as having the .undefined rule by default, but allows ABI authors to override that.

Parameters

reg_number: u8,
out: []u8,