Re:Exploiting System Management Mode with a very long interrupt
by userbinator on Tuesday August 11, 2026 @01:50AM
(#49253834)
the SMM code would have no reason to disallow the kernel modifying or replacing it
Don't forget that SMM code started out in A0000 --- the area of RAM that would've otherwise been inaccessible and wasted anyway, because it was usually decoded to the VGA. Also, this was the era of DOS; there was no difference between "kernel" and "application".
Don't forget that SMM code started out in A0000 --- the area of RAM that would've otherwise been inaccessible and wasted anyway, because it was usually decoded to the VGA. Also, this was the era of DOS; there was no difference between "kernel" and "application".