3 ms·
The XOR is applied inside the CPU when local pointers (any pointer with a particular high bit set) are actually dereferenced. Its transparent to the normal pro
by willvarfar 12y ago
The XOR is applied inside the CPU when local pointers (any pointer with a particular high bit set) are actually dereferenced. Its transparent to the normal program. This is how we can COW the used pages without rewriting all the pointers (which is not a solvable problem in the face of memory-unsafe languages such as C).