[okl4-developer] linking boot image

[Geoffrey Lee]

On Mon, Aug 18, 2008 at 02:47:40PM +1000, Tomas Hruby wrote:
> Hi,
> 
> > If you look closely, the elfadorn command actually contains a call to  
> > the linker (ld).  The -Ttext option is actually passed to the linker,  
> > not elfadorn.  If you take a look at the linker man page, you'll find  
> > that -Ttext determines the absolute address that the .text section will 
> > be linked to.  This is important because the bootloader should start 
> > execution from this very address after bootstrap.
> 
> Yes, that is clear. It was probably a wrong question. I mean, where
> does this specific value comes from when linking the root server. I am
> not specifying it anywhere.  I fured out that I can change it by
> setting _LINKADDRESS in machine if I want to link usercode to a
> different address.

Hi Tomas

The programs are laid out in memory by the build system.  Hence
this address is picked by the build system.  However, I don't
think this answers what are you are really after.  Do you have
a specific problem that you are trying to solve?


> 
> 		T.
> 

	-gl

> > Of course, depending on your setup, it is possible to change this  
> > address and still have a working system (for example, simply telling the 
> > bootloader to start at a different address).
> >
> > Which platform are you working on, and what linker is being used?
> >
> > Nelson.
> >
> > On 18/08/2008, at 11:30 AM, Tomas Hruby wrote:
> >
> >> when linking, elfadorn gets called with -Ttext=100000 option. Where
> >> does it come from? How can I change it (or not to use it)?
> >
> > --
> > (nt)
> >
> > Nelson Tam
> >
> >
> 
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