new syscall stub for ia64 linux

[Ulrich Drepper]

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David Mosberger wrote:

> I'm not sure I understand how this is supposed to work.  Do you mean
> that a word in the AT_SYSINFO page would give you a feature-bitmap?

It will over time be more than a word but yes, that's the plan.


> If so, how does that work with old kernels (where you don't get
> AT_SYSINFO) at all, but you still need to know the kernel revision?

We'll see.  Perhaps the new syscall stuff won't be used in ld.so unless
you can assume at least a kernel version recent enough to support
AT_SYSINFO.


> BTW: On ia64, the gate page that AT_SYSINFO points to is
> "execute-only", so we can't read stuff directly off of it.

This is an architecture detail.  I cannot tell you more now since we
haven't yet reached an agreement with Linus.

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Ulrich Drepper \    ,-----------------'   \ Mountain View, CA 94041 USA
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