Re: How to load and execute COFF file

[Toralf Lund <toralf at procaptura dot com>]

On 2003.09.12 18:56, Bill Gatliff wrote:
> Toralf:
>
>
> If the target runs gdbstubs, then you could download and launch the 
> COFF file with gdb.
It doesn't. It runs nothing as all, really, except for a very simple 
"bug rom" routine. That routine may be instructed via an externally 
generated interrupt to jump to a certain memory location, though, 
typically after the code has been written to the unit's memory by 
another board (it has dual-port RAM.)

Essentially what I'm asking is how do I find the jump address, and do I 
have to do special relocation operations or anything before entering it?
> b.g.
>
>
> Toralf Lund wrote:
>
> > I think I mentioned this earlier, but another question that will be 
> > coming up, is how to load and execute a (m68k) COFF file without an 
> > OS. With the OS-9 module format that I am used to, I would just load 
> > the module at specific address, extract an "execution offset" from 
> > the module header and add it to the load address, and jump to to the 
> > resulting address. I imagine that with COFF (or ELF, which is of 
> > course an alternative, too), it will be slightly more complex. Any 
> > information on how to do it would be appreciated.
> >
> > - Toralf
> >
> >
> >
> > ------
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> > http://www.objsw.com/CrossGCC/
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>
> --
> Bill Gatliff
> GNU-based embedded development, training and consulting services.
> bgat@billgatliff.com
>
>
>
> ------
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