Re: [PATCH 10/33] i386: Relocatable kernel support.

[Mika Penttilä]

Eric W. Biederman wrote:
> Mika Penttilä <mika.penttila@xxxxxxxxxxx> writes:
>
>   
> > > @@ -1,9 +1,10 @@
> > >  SECTIONS
> > >  {
> > > -  .data : { +  .data.compressed : {
> > >  	input_len = .;
> > >  	LONG(input_data_end - input_data) input_data = .;  	*(.data)
> > > +	output_len = . - 4;
> > >  	input_data_end = .;  	}
> > >  }
> > >
> > >       
> > I don't see how you are getting the uncompressed length from output_len...
> >     
>
> It's part of the gzip format.  It places the length at the end of
> the compressed data.  I am just computing the address of where gzip
> put the length and putting a variable there called output_len.
>
> Isn't linker script magic wonderful :)
>
> Eric
> -
>   
Huh, quite a nice trick indeed!

Thanks,
Mika

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