Re: [PATCH for_v29 v2 0/5] x86/sgx: Make vDSO callable from C

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On Mon, Mar 30, 2020 at 05:42:29PM -0400, Nathaniel McCallum wrote:
> On Mon, Mar 30, 2020 at 4:48 PM Jarkko Sakkinen
> <jarkko.sakkinen@xxxxxxxxxxxxxxx> wrote:
> >
> > On Mon, Mar 30, 2020 at 11:08:06AM -0700, Sean Christopherson wrote:
> > > Nathaniel pointed out that __vdso_sgx_enter_enclave() is tantalizingly
> > > close to being callable from C (with caveats and a cooperative enclave).
> > > The missing pieces are preserving %rbx and taking @leaf as a standard
> > > parameter.
> > >
> > > v2:
> > >   - Rebase to Jarkko's latest master, commit 402fb35a477a, "docs: ...")
> > >   - Add CFI directive for RBX. [Cedric]
> >
> > I'm sorry for throwing stick's constantly but I think having a real
> > ELF loader is for better.
> 
> Why is it one or the other?

Hmm... Not sure I understand what you want to know.

A raw binary requires a hardcoded way to interpret it. Obviously ELF
is for better.

/Jarkko



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