turn off VDSO on glibc side

[heroxbd]

Hey Mike,

Mike Frysinger <vapier@gentoo.org> writes:

> there aren't any configure flags or runtime knobs that i know of on
> the glibc side of things.  you could edit elf/dl-support.c and try
> commenting out the parts that handle AT_SYSINFO and AT_SYSINFO_EHDR.

I've pursued this approach. So far a base system was built around the
patched glibc on that vdso-buggy kernel, verifying that it works. Here I
attach a simple (and ugly) patch I used to disable VDSO completely for
completeness.

Thanks a lot!

Benda
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