This doesn't change what gettimeofday(2) gives you (and actually you can't even use ptrace easily to fake the time of day because gettimeofday(2) isn't a real s

This doesn't change what gettimeofday(2) gives you (and actually you can't even use ptrace easily to fake the time of day because gettimeofday(2) isn't a real syscall -- it's actually implemented as a read from the vDSO page the kernel maps into every process).