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.
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.
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