3 ms·

That only ensures the programmer fixes the pointer before dereference. Tagged pointers that don’t make it to the bus are still a compatibility problem. It mean

That only ensures the programmer fixes the pointer before dereference. Tagged pointers that don’t make it to the bus are still a compatibility problem. It means malloc() can’t return an address overlapping the tagged bits.

saagarjha 7y ago
malloc usually gets more aligned with time, not less. The tagging we're talking about goes in the high bits of a pointer.
- jdsully 7y ago
  Yes and as memory increases more of the high bits are used as actual address bits. X64 started with 40 physical bits. We’re now at 48.