Re: 2.15 branch merge

[Daniel Jacobowitz <drow at false dot org>]

On Sun, Apr 11, 2004 at 06:29:50PM -0300, Alexandre Oliva wrote:
> On Apr 10, 2004, Daniel Jacobowitz <drow@false.org> wrote:
> 
> > Depends on your target, of course: if you have 4K pages, and page-level
> > virtual memory mappings, then it doesn't much matter.  The extra pages
> > will waste up to 12 KB worth of virtual address space.  If you don't
> > have an MMU (doesn't the FRV port support uclinux as a kernel?) then
> > that might be a much bigger deal, since you'll be wasting real RAM.
> 
> There is an MMU on at least one of the parts targeted by the FDPIC
> ABI, and the minimum page size is 16KiB.
> 
> It's frv-elf that I'm worried about.  This patch changes the `Align'
> entry of every PT_LOAD PHDR from 0x1000 to 0x4000.  I don't quite
> understand the implications of this change though.
> 
> > Perhaps you should look at COMMONPAGESIZE, which will probably fix
> > this.
> 
> Err...  I don't see how it could.  The problem is that, for non-FDPIC,
> I'd like to keep ELFPAGESIZE as it was before, but for FDPIC, I really
> need it to be bumped up to 16KiB.

You're probably right, I was confused.

-- 
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer