--- "Eric W. Biederman" wrote:
> So I really don't care if we move whole real mode section into a note
> or if we just put a pointer to it into a note. What is important is
> that we use a note to find it.
Well, we can advertise by a note the section number or the section
name which contains the real-mode code, but finding the section of
type SHT_PROGBITS having SHF_EXECINSTR flags linked at zero is not
that difficult to do: it is what Gujin does right now when it does
not find the program header linked at zero.
> Which means that we could do something goofy in the linker script
> like we do with the current vdso. So we could give it a virtual
> address of 0 and a physical address in the init code section.
Gujin loads at the physical address, i.e. kernel is loaded at
0x100000 and not 0xC0100000, is that wrong?
I am not sure playing these games with addresses is cleaner than
not loading a section which is not in the program header.
> For me the objective is not so much reusing the existing tools
> (although that is a plus) but more to be able to build a unified
> binary that can be used for everything, and will give us the freedom
> to do interesting things with the kernel in the future, and hopefully
> something that is more or less usable by portable bootloaders. Having
> a different file format and different rules for different
> architectures is a pain.
For me the objective is to have a reasonable bootloader,
I will not have the time to port back and test with every other
bootloader some transfert of code from Gujin to an ELF looking
like bzImage file.
Etienne.
___________________________________________________________________________
Découvrez une nouvelle façon d'obtenir des réponses à toutes vos questions !
Profitez des connaissances, des opinions et des expériences des internautes sur
Yahoo! Questions/Réponses
http://fr.answers.yahoo.com
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
