Re: objtool warnings for kernel/trace/trace_selftest_dynamic.o
From: Andi Kleen
Date: Mon Dec 17 2018 - 16:03:38 EST
> > That seems weird.
> > Are you sure it's not just because they are empty? AFAIK
> > gcc doesn't necessarily generate frame pointers for empty functions.
> I suspected that it was because they're empty, however I didn't see this
> warning for other leaf functions. The sancov plugin is presumably
> taking care of adding frame pointers where needed. Also, adding
That would surprise me.
> -mno-omit-leaf-frame-pointer didn't fix it.
> And anyway I confirmed that it was fixed by removing __noclone.
So this is with a plugin?
Maybe the plugin does something wrong?
I thought this was just a standard build.
I'm not sure the problem is well enough understood yet
to really do anything.
Do you have a simple standalone test case to show the compiler behavior?