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List:       uclinux-dev
Subject:    Re: [uClinux-dev] Non-PIC gcc usable?
From:       David McCullough <davidm () snapgear ! com>
Date:       2001-12-24 11:43:44
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Jivin Kazu Hirata lays it down ...
> Hi David,
> 
> > > Is it possible to use gcc that does not support PIC to compile
> > > applications for uClinux?
> > 
> > Absolutely, the coldfire port ran like this for quite some time.
> > Basically you just use flat binaries where the code+data is
> > relocated at execute time.  The cost is it requires more memory.
> 
> I see.  After getting your response, I started reading binfmt_flat.c
> and found it helpful.
> 
> Does an access to absolute address (like I/O port) get moved as well?
> I know that an application should go through the kernel to access I/O
> ports, but in some cases, it's so tempting.

No,  it's a constant,  not a variable or reference within the program.

Cheers,
Davidm

-- 
David McCullough:    Ph: +61 7 3435 2815  http://www.SnapGear.com
davidm@snapgear.com  Fx: +61 7 3891 3630  825 Stanley St., W'gabba QLD 4102, Oz
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