Okay to change default zImage link/load address?

[Mark A. Greer]

On Sat, Feb 10, 2007 at 11:53:31AM +1100, David Gibson wrote:
> On Fri, Feb 09, 2007 at 04:25:33PM -0700, Mark A. Greer wrote:
> > On Fri, Feb 09, 2007 at 04:21:00PM -0700, Mark A. Greer wrote:
> > > On Sat, Feb 10, 2007 at 09:40:10AM +1100, David Gibson wrote:
> > > 
> > > > Note that the zImage is already build -fPIC and capable of relocating
> > > > itself if loaded at an address other than 4MB...
> > > 
> > > That doesn't address the issue.
> > > 
> > > Many firmwares look at the address in the ELF header and that's where
> > > they download it, period.  Right now, that address is 4MB, period.
> > > 4MB doesn't work on some platforms so I'm looking for an acceptable
> > > alternative.
> > 
> > David, if I sounded rude, I didn't mean to.
> 
> No no.  I see your point.
> 
> Hrm... I've already been thinking that we'll need to make the crt0.S
> replaceable by platform.  The same is probably true for the linker
> script.

Looks like objcopy can change the addr for us.  So we could pass a
CONFIG_ value from the Makefile to 'wrapper' and have wrapper run objcopy.
Seems easier than having to make your own linker script just to change
the addr.

Mark