#[repr(packed)]
pub struct Tss {
    pub reserved1: u32,
    pub sp0: u64,
    pub sp1: u64,
    pub sp2: u64,
    pub reserved2: u32,
    pub reserved3: u32,
    pub ist1: u64,
    pub ist2: u64,
    pub ist3: u64,
    pub ist4: u64,
    pub ist5: u64,
    pub ist6: u64,
    pub ist7: u64,
    pub reserved4: u32,
    pub reserved5: u32,
    pub reserved6: u16,
    pub iomap_base: u16,
}