dwarfRegisterBytes

    pub fn dwarfRegisterBytes(ctx: *Arc, register_num: u16) DwarfRegisterError![]u8 {
        switch (register_num) {
            0...31 => return @ptrCast(&ctx.r[register_num]),
            160 => return @ptrCast(&ctx.pcl),

            32...57 => return error.UnsupportedRegister, // Extension Core Registers
            58...127 => return error.UnsupportedRegister, // Reserved
            128...159 => return error.UnsupportedRegister, // f0 - f31

            else => return error.InvalidRegister,
        }
    }