[PATCH v2] efistub: Only link libstub to final vmlinux

[Huacai Chen]

On Wed, Nov 12, 2025 at 2:00 AM Josh Poimboeuf <jpoimboe at kernel.org> wrote:
>
> On Mon, Nov 10, 2025 at 03:00:00PM +0800, Huacai Chen wrote:
> > On Mon, Nov 10, 2025 at 9:19 AM Tiezhu Yang <yangtiezhu at loongson.cn> wrote:
> > > If I understand correctly, I should modify this patch to remove the
> > > changes of arm and riscv for now, do the changes only when there is
> > > a real problem or requirement some day, right? If no more comments,
> > > I will send v3 later.
> >
> > Now everyone involved agrees that the efistub code is correct, so the
> > proper solution is to fix the compiler.
>
> Hm?  I don't see how it's a compiler bug.  It's really just an objtool
> limitation.
>
> > Changing efistub code and changing objtool (ignore __efistub prefix)
> > are both workarounds, but I think changing objtool is a little more
> > reasonable. Maybe Josh has different ideas?
>
> I thought the conversation had converged on what Tiezhu mentioned above,
> which is to skip objtool on libstub for loongarch, but leave the other
> arches alone.  That way objtool behavior is consistent between loongarch
> and x86, and objtool doesn't need to ignore any prefixes.
>
> So basically, the v2 patch minus the arm64/riscv changes.

Hi, ARM64 and RISC-V maintainers,

Would you mind that this patch modifies the three architectures
together (they are exactly the same style now)?

Madhavan is the author of ARM64's objtool, I think your opinion is
also very important.


Huacai

>
> --
> Josh