"What is a retpoline and how does it work?" https://stackoverflow.com/questions/48089426/what-is-a-retpoline-and-how-does-it-work
On Wednesday, September 12, 2018, Wes Turner <wes.tur...@gmail.com> wrote: > On Wednesday, September 12, 2018, Joni Orponen <j.orpo...@4teamwork.ch> > wrote: > >> On Wed, Sep 12, 2018 at 8:48 PM Wes Turner <wes.tur...@gmail.com> wrote: >> >>> Should C extensions that compile all add >>> `-mindirect-branch=thunk -mindirect-branch-register` [1] to mitigate the >>> risk of Spectre variant 2 (which does indeed affect user space applications >>> as well as kernels)? >>> >> >> Are those available on GCC <= 4.2.0 as per PEP 513? >> > > AFAIU, only > GCC 7.3 and 8 have the retpoline (indirect-branch=thunk) support enabled > by the `-mindirect-branch=thunk -mindirect-branch-register` CFLAGS. > >>
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