Re: Memory protection between compilation units?

On Wed, 11 Jun 2025 17:19 Opus wrote:

There is a proposed extension for the RISC-V ISA called CHERI that
offers the kind of fine-grained memory protection that could fit your
purpose here.

CHERI was indeed one of the first links that google offered when I
tried looking for an existing solution. But as you noted, it's not
available on "normal" hardware, and sadly google wasn't able to propose
any more "real-world" alternatives.

Second note: you chose to wrap indices around to handle possible
out-of-bounds accesses. That may or may not be a good idea depending
on the exact context. You may alternatively want to do nothing if val
is out of bounds

This was about a primitive 64K hash map, so out of bounds situations
were expected impossible to happen... if the programmer hadn't
sized his array 1 entry too short.

Mateusz