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Re: CVS commit: src (_UC_TLSBASE)
On Sep 12, 2012, at 12:26 AM, Emmanuel Dreyfus wrote:
> On Tue, Sep 11, 2012 at 11:20:47PM -0700, Matt Thomas wrote:
>> _UC_TLSBASE is an MD thing.
> iMO it is a MI interface with a MD implementation. It just says whether
> TLS is part of struct mcontext or not. The MD code can handle that in
> the kernel or in userland if that is possible.
>> Defining it unconditionally bloats things.
>> For instance, if _UC_TLSBASE isn't defined, pthread_setcontext doesn't
>> need to do anything except call setcontext. That's a win.
> But do we have any port that are in this situation? I understand
> they all change the TLS pointer with setcontext.
Actually, several don't. arm doesn't, mips doesn't, vax doesn't,
m68k doesn't. They may be others.
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