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.
