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Re: recent binutils and mips64-linux
On Tue, Sep 23, 2003 at 11:01:11AM -0700, Eric Christopher wrote:
>
> > >
> > > objcopy?
> >
> > You mean, let gcc generate n64 code, stuff it in n32 objects, and
> > objcopy it back to n64? Well, it may work, but it looks more like
> > a test of binutils sign-extension handling than a straightforward
> > way of creating kernels to me.
> >
> > Besides, as soon as gcc handles 64bit expansions itself we need
> > such an option anyway.
>
> I'm still trying to figure out why you are going through such weird
> contortions at all. I understand not having an elf64 loader. That's what
> the objcopy comment was for, everything else I don't understand. Why not
> compile for the abi you want?
Compare the optimal way to load an address into a register when you
have a full 64-bit address space and when you know that addresses are
sign extended. I'm told it saves over 100K of code.
--
Daniel Jacobowitz
MontaVista Software Debian GNU/Linux Developer