On Thu, Jun 7, 2018 at 7:42 AM Yu-cheng Yu <yu-cheng.yu@xxxxxxxxx> wrote: > > From: "H.J. Lu" <hjl.tools@xxxxxxxxx> > > When Intel indirect branch tracking is enabled, functions in vDSO which > may be called indirectly should have endbr32 or endbr64 as the first > instruction. We try to compile vDSO with -fcf-protection=branch -mibt > if possible. Otherwise, we insert endbr32 or endbr64 by hand to assembly > codes generated by the compiler. Wow, that's... a genuine abomination. Do we really need to support CET on kernels built with old toolchains? --Andy
