Re: amd64 kernels and text address

["Julio M. Merino Vidal" <jmmv84%gmail.com@localhost>]

On Mar 26, 2008, at 14:40 , Martin Husemann wrote:

> On Mon, Mar 24, 2008 at 01:09:40PM +0100, Julio M. Merino Vidal wrote:
> > Upon further inspection, I noticed the following in the resulting
> > binaries:
> >
> > Idx Name          Size      VMA               LMA               File
> > off  Algn
> >   0 .text         005c4548  ffffffff80100000  ffffffff80100000
> > 00100000  2**6
> >                   CONTENTS, ALLOC, LOAD, READONLY, CODE
>
> Not that I could offer any help, but just note that sparc64 has  
> similar
> constraints (needs text + rodata merged and big-page aligned, puts  
> data
> big-page aligned after that), and it works there:
>
> Idx Name          Size      VMA               LMA                
> File off  Algn
>   0 .text         00230100  0000000001000000  0000000001000000   
> 00000100  2**7
>                   CONTENTS, ALLOC, LOAD, READONLY, CODE
>
> One other note: the leading zeros should not realy hurt that much,  
> as the
> file is sparse, and all zeroes should compress pretty well.
>
> How did you try to add your separate section?

I added a

    .section "foo"
    <multiboot header contents>

in locore.S and then added

    .foo : { *(.foo) }

in the linker script, before .text.  I also tried with an allocatable  
section.

Was that correct?