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Message-ID: <b0491cb517ba377da6496fe91a98fdbfca4609a9.camel@intel.com>
Subject: Re: [PATCH v7 22/27] binfmt_elf: Extract .note.gnu.property from an
 ELF file
From:   Yu-cheng Yu <yu-cheng.yu@intel.com>
To:     Florian Weimer <fweimer@redhat.com>
Cc:     Dave Martin <Dave.Martin@arm.com>,
        Peter Zijlstra <peterz@infradead.org>,
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Date:   Tue, 18 Jun 2019 09:00:35 -0700
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On Tue, 2019-06-18 at 18:05 +0200, Florian Weimer wrote:
> * Yu-cheng Yu:
> 
> > > I assumed that it would also parse the main executable and make
> > > adjustments based on that.
> > 
> > Yes, Linux also looks at the main executable's header, but not its
> > NT_GNU_PROPERTY_TYPE_0 if there is a loader.
> > 
> > > 
> > > ld.so can certainly provide whatever the kernel needs.  We need to tweak
> > > the existing loader anyway.
> > > 
> > > No valid statically-linked binaries exist today, so this is not a
> > > consideration at this point.
> > 
> > So from kernel, we look at only PT_GNU_PROPERTY?
> 
> If you don't parse notes/segments in the executable for CET, then yes.
> We can put PT_GNU_PROPERTY into the loader.

Thanks!