Re: Patch to make the head.S-must-be-first-in-vmlinux order explicit

[Arjan van de Ven]

Eric W. Biederman wrote:
> Andi Kleen <ak@xxxxxxx> writes:
>
> > On Thursday 23 February 2006 14:57, Arjan van de Ven wrote:
> >
> > > > (or at least
> > > > it shouldn't), but arch/x86_64/boot/compressed/head.S
> > > > seems to have the entry address hardcoded. Perhaps you can just change this
> > > > to pass in the right address?
> > > the issue is that the address will be a link time thing, which means 
> > > lots of complexity.
> > bzImage image should be only generated after vmlinux is done 
> > and then the address should be available with a simple grep in System.map
>
> Andi it is more than that.  At least it was last I payed attention.
> There are symbols like stext that various things depend on being early,
> at least last time I looked.  So while it is doable it requires some
> careful looking.

_stext and such are very easy. That is actually not a real variable just 
a linker script thing, and since the reordering works on the linker 
script level that's already taken care of ;-)

I've looked some yesterday at generating this at runtime, and haven't 
found a clean enough solution yet (esp one that doesn't break kdump); 
I'll keep poking at it for a bit more though....
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