Re: [PATCH v7 22/27] binfmt_elf: Extract .note.gnu.property from an ELF file

Yu-cheng Yu
2019-06-18T16:01:40Z

On Tue, 2019-06-18 at 17:49 +0200, Florian Weimer wrote:
> * Yu-cheng Yu:
>
> > The kernel looks at only ld-linux. Other applications are loaded by ld-
> > linux.
> > So the issues are limited to three versions of ld-linux's. Can we somehow
> > update those??
>
> 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?

Yu-cheng