New subject: compile uclibc with retpoline switch

4 Apr 2018

Hi,
Ata, John  (US) wrote,

...
  Hi all,

 With Spectre variant 2 (CVE-2017-5715), gcc has been updated to avoid branch
 prediction problems via the retpoline patch.  Specifically, by using either –
 mindirect-branch=thunk-inline or –mindirect-branch=thunk or –mindirect-branch-
 thunk-external, the compiler will convert indirect branches and function
 returns to call and return thunks thus avoiding speculative execution in those
 cases.  Of course, there is a performance penalty depending on the exact
 argument used.  Has anyone compiled uclibc with one of those switches? 
I didn't tried it, yet. You might be the first :)

Any issues seen with that?

best regards
 Waldemar

Re: [uclibc-ng-devel] compile uclibc with retpoline switch