Re: Using FILL(n) or =FILLEXP in linker scripts

[Mike Frysinger <vapier at gentoo dot org>]

On Friday 10 August 2007, Alan Modra wrote:
> On Thu, Aug 09, 2007 at 02:19:01PM -0400, Ti Strga wrote:
> > .internal_chunk_two : {
> >     FILL(0xDEADBEEF)           /* attempt one */
> >     __chunk_two_bottom = .;
> >     . = . + _CHUNK_TWO_SIZE;
> >     . = ALIGN(16);
> >     __chunk_two_top = .;
> > } > ram =0xDEADBEEF           /* attempt two */
> >
> > Neither FILL nor FILLEXP work here.
> >
> > Our questions:
> > (1)  What are we doing wrong with the fill expression?
>
> The reason the fill isn't working is that ld treats this section like
> a bss section.  It doesn't have any input sections containing data,
> nor does it have any data statements.  You could argure that a
> non-zero fill ought to force a normal section, ie. you've struck a ld
> bug.

could you also argue that an explicit 0 fill should force a normal section ?  
in other words, you want a .bss like section to be zero filled both on disk 
as well as in memory at runtime ...
-mike

Attachment: signature.asc
Description: This is a digitally signed message part.