[RFC] Objtool toolchain proposal: -fannotate-{jump-table,noreturn}

[Peter Zijlstra]

On Fri, Sep 09, 2022 at 11:07:04AM -0700, Josh Poimboeuf wrote:
> Alternatives
> ------------
> 
> Another idea which has been floated in the past is for objtool to read
> DWARF (or .eh_frame) to help it figure out the control flow.  That
> hasn't been tried yet, but would be considerably more difficult and
> fragile IMO.

I though Ard played around with that a bit on ARM64. And yes, given that
most toolchains consider DWARF itself best-effort, I'm not holding my
breath there.

On top of that, building a kernel with DWARFs on is just so much
slower..