[PATCH][middle-end][i386][version 5]Add -fzero-call-used-regs=[skip|used-gpr-arg|used-arg|all-gpr-arg|all-arg|used-gpr|all-gpr|used|all]

[Segher Boessenkool]

On Thu, Oct 29, 2020 at 06:02:58PM +0000, Richard Sandiford wrote:
> Qing Zhao via Gcc-patches <gcc-patches@gcc.gnu.org> writes:
> >>> +Return-Oriented Programming (ROP) or preventing information leak
> >> 
> >> leakage
> >> 
> >> (FWIW, I'm not sure “mitigating ROP” is really correct usage, but I don't
> >> have any better suggestions.)
> >
> > Do you mean whether “mitigating ROP’ is one of the major purpose of this new feature?
> 
> No, I meant just the English usage.  E.g., I think you mitigate the
> damage caused by earthquakes rather than mitigate earthquakes themselves.
> But I could be wrong.  It's not a word I use very often ;-)

"Mitigating ROP attacks" is a phrase often used in the literature, sadly
(what is really meant is not "mitigating the effects of ROP attacks",
but simply "making ROP attacks less likely to succeed" -- it is almost
always a binary thing, either it succeeds or it doesn't).


Segher