Status of 2.5.X kernels on PPC Linux, anyone working with NPTL?
aldyh at redhat.com
Mon Nov 4 05:28:22 EST 2002
>>>>> "David" == David Edelsohn <dje at watson.ibm.com> writes:
>>>>> Kevin Hendricks writes:
Kevin> Also, is anyone here actively working on Ulrich Drepper's New Posix
Kevin> Thread Library (NPTL) to add in support for ppc Linux? Has anyone
Kevin> decided on what register will be used for Thread Local Storage on PPC
Kevin> (32bit)? (Is this r13 on ppc64?). Have the necessary modifications to
Kevin> the ABI/compiler been made to support a dedicated thread local storage
> There still is a question of what the final version of thread
> support will look like in Glibc. TLS support has not been added to
> PowerPC GCC yet. GPR 13 is reserved for the thread ID. I do not know
> whether that also can be used as the TLS base pointer.
Funny I was just talking to Richard Henderson on the plane about this
David, I was thinking on working on TLS for PPC (gcc side of things),
but Kevin is right, we need to get a register and change the ABI, else
things can get really spooky. I was thinking we could use r13 (?)
like PPC64 does.
I also vaguely recall that Geoff has a list of ABI changes pending.
Perhaps we should do all these at the same time.
Anywhoooo, we should probably discuss this on the gcc lis instead.
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