> On May 2, 2019, at 12:28 PM, Jiri Kosina <jikos@xxxxxxxxxx> wrote: > >> On Thu, 2 May 2019, Linus Torvalds wrote: >> >> I forget: is #BP _only_ for the "int3" instruction? > > Hmm, according to 17.3.2 in vol 3 of SDM (and table 6-1 there), that > indeed seems to be the case, so we should be fine. I’m reasonably confident that the absurd MOV SS; INT3 sequence results in #BP from user mode and then #DB inside that (as opposed to vice versa), so this should be okay.
