0x7fccb6993fab : cmp $0xfffffffffffff000,%rax 0x7fccb6993fb1 : mov %eax,%edx 0x7fccb6993fb3 : ja 0x7fccb6993fb8 0x7fccb6993fb5 : mov %edx,%eax 0x7fccb6993fb7 : retq 0x7fccb6993fb8 : mov %eax,%edx 0x7fccb6993fba : mov 0x207fdf(%rip),%rax # 0x7fccb6b9bfa0 0x7fccb6993fc1 : neg %edx 0x7fccb6993fc3 : mov %edx,%fs:(%rax) 0x7fccb6993fc6 : mov $0xffffffff,%edx 0x7fccb6993fcb : jmp 0x7fccb6993fb5 0x7fccb6993fcd: nop 0x7fccb6993fce: nop 0x7fccb6993fcf: nop 0x7fccb6993fd0 : jmpq 0x7fccb6989e98 <__libc_system@plt> 0x7fccb6993fd5: nop