[PATCH] Fix runtime linker auditing on aarch64

[Florian Weimer]

* Szabolcs Nagy:

> we don't have a way to do this in the architecture
> (i.e. reg state save/restore operations)
> we can have something in the kernel (which needs
> to know about the supported registers) but i
> assume using a syscall for this is too much overhead.

Yes, seems like a system call would be problematic.

> (maybe in vdso? sounds ugly if we need it before
> vdso is set up)

Indeed.

If AArch64 doesn't have a generic mechanism, that certainly simplifies
matters because there's no dynamic linker alignment to the hardware
needed then.

Thanks,
Florian
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