The address within the 64k chunk is found by an ... that FFFF0 is really really really really close to the bottom of our memory map. Indeed, it is only 16 bytes away. So the first instruction ...

The memory map defines how software should address hardware and how it can trigger the primitive operations required to control and monitor the chip functions. To ensure the memory map is correct, ...

To that end, the Chromium team stated (in the V8 Sandbox Readme), "The sandbox assumes that an attacker can arbitrarily and concurrently modify any memory inside the sandbox address space as this ...