native_load_gdt
native_load_gdt(&startup_gdt_descr);
#define load_gdt(dtr) native_load_gdt(dtr)
native_load_gdt(&invalid_gdt);
.cpu.load_gdt = native_load_gdt,
native_load_gdt(&(struct desc_ptr){ sizeof(gdt) - 1, (u64)gdt });