Re: [PATCH -tip v3 1/2] kcov: Make runtime functions noinstr-compatible

Peter Zijlstra
2020-06-08T11:01:34Z

On Mon, Jun 08, 2020 at 09:57:39AM +0200, Dmitry Vyukov wrote:

> As a crazy idea: is it possible to employ objtool (linker script?) to
> rewrite all coverage calls to nops in the noinstr section? Or relocate
> to nop function?
> What we are trying to do is very static, it _should_ have been done
> during build. We don't have means in existing _compilers_ to do this,
> but maybe we could do it elsewhere during build?...

Let me try and figure out how to make objtool actually rewrite code.