Justin C. Miller 5c3943bf38 [kernel] Make grabbing an IST stack atomic ...

In the beginning of the interrupt handler, we had previously checked if
the current handler had grabbed an IST stack from the IDT/TSS. If it
was, it saved this value and set it to 0 in the IDT, then restored it at
the end.

Now this is an atomic action. This is unlikely to make a difference
unless the interrupt handler is itself interrupted by an exception
before being able to swap the IDT value, but such a situation is now
impossible.

2022-03-13 17:49:29 -07:00

2.5 KiB

Raw Blame History

View Raw