Saving to 32 bits of GPRs in signal context

[Ulrich Weigand]

Steve Munroe <sjmunroe at us.ibm.com> wrote on 05/29/2007 04:00:42 PM:

> Yes exactly why make an incompatible ABI change to the powerp32 ABI, 
when
> you can just use the existing 64-bit ABI.
> 
> Especially as you can only run what is proposed on 64-bit hardware!
> 
> We don't need another ABI change to powerpc32 (still recovering from the
> -msecure-plt ABI change) and WE DONT NEED a 3rd ABI.
> 
> ABI changes ripple everywhere (not just GCC/GLIBC) including all 
debuggers
> and performance tools. Believe me you really don't want this.

Fully agreed.  This may have gotten lost in the discussion thread, but 
what
Ben originally proposed was *not* an ABI change, for exactly that reason.
We simply want to allow strictly local use of 64-bit registers for
performance optimization purposes, while still fully complying with
the 32-bit ABI.


Mit freundlichen Gruessen / Best Regards

Ulrich Weigand

-- 
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  GNU compiler/toolchain for Linux on System z and Cell BE
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