=> 0x7fc805b05445 : cmp $0xfffffffffffff000,%rax 0x7fc805b0544b : ja 0x7fc805b0545f 0x7fc805b0544d : repz retq 0x7fc805b0544f : nop 0x7fc805b05450 : test %eax,%eax 0x7fc805b05452 : jg 0x7fc805b05435 0x7fc805b05454 : test $0x7fffffff,%eax 0x7fc805b05459 : je 0x7fc805b05470 0x7fc805b0545b : neg %eax 0x7fc805b0545d : jmp 0x7fc805b05435 0x7fc805b0545f : mov 0x37f9ba(%rip),%rdx # 0x7fc805e84e20 0x7fc805b05466 : neg %eax 0x7fc805b05468 : mov %eax,%fs:(%rdx) 0x7fc805b0546b : or $0xffffffffffffffff,%rax 0x7fc805b0546f : retq 0x7fc805b05470 : mov %esi,%eax