thread-ready ABIs

[Ulrich Drepper]

Andreas Schwab <schwab@suse.de> writes:

> None of the address registers are useless, they are all needed.  Reserving
> one of them as a thread register means an ABI change, since currently all
> (address or data) registers are either scratch or callee-saved.

And this means?  Make a decision.  Will you break the ABI or never
have a thread register?

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