0x000000000000121a <+4>: sub    rsp,0x30
   0x000000000000121e <+8>: mov    rax,QWORD PTR fs:0x28
   0x0000000000001227 <+17>:mov    QWORD PTR [rbp-0x8],rax
   0x000000000000122b <+21>:xor    eax,eax