On Mon 2010-02-15 14:15:17, H. Peter Anvin wrote: > On 02/15/2010 01:04 PM, Benjamin Herrenschmidt wrote: > > > > It's true that most other use of it we have are global scope (local_paca > > in r13, glibc use of r2/r13, etc...) afaik, but since r1 itself is the > > stack pointer always, I think they pretty much guarantee it works. > > > > It should work, because r1, being the stack pointer, is already marked a > reserved register in gcc. > > The reference Pavel is citing bascially states that gcc won't globally > reserve the register, which is true, but it is already reserved anyway.
Ok, thanks for clarification. -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
