Re: [microblaze-uclinux] can't mount root fs...!?

[John Williams <jwilliams@itee.uq.edu.au>]

Hi Flavius,

Flavius Gruian wrote:
> I'm trying to run uClinux with an image compiled by myself,
> on the mbvanilla configuration (2.00f). I can get most of
> the things running, yet when I download and run image.elf this
> is what I get:

Yes, this is a known (but maybe not yet documented) problem.  The 
solution is to run

mb-objcopy -O binary image.elf image.bin

then in XMD download with

dow -data image.bin 0x8000000

(or whatever start address you linked for).

Objcopy is used to insert the romfs image as a section .romfs into the 
elf file (have a look in vendors/Insight/XC2V1K_Microblaze/Makefile). 
However, objcopy (all versions, not just microblaze) doesn't put the 
section into a segment.  Then, when the XMD elf loader picks up the 
file, it doesn't download any sections not in segments.  It's a known 
problem in uClinux land.  It could be fixed by patching ELF binutils 
(which includes objcopy), but most seem to think it's such a standard 
thing that elf loaders should just support it.

Regards,

John

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