Re: Read Flash-Dumps

[Peter Keel <killer@discordia.ch>]

* on the Wed, May 09, 2001 at 06:18:05PM +0100, dr john halewood was blubbering:
> On Wednesday 09 May 2001 18:01, Peter Keel wrote:
> >
> > So how do I do a loopack-mount of the files? I tried several
> > filesystems, but that doesn't seem to work. Also, nftl doesn't
> > even appear in /proc/filesystems.
> >
> IIRC the igel box uses minix filesystems mounted on top of the NFTL so you 
> don't access the flash layer directly. (It also uses the M-Systems proprietry 
> driver, which isn't suprising as Igel wrote it)

Wrapup. 

Its Flash has the following structure:
/dev/fla contains the whole flash. In the following order:
    00000000-000003FF	something which "file" identifies as 
			linux-kernel. contains a valid partition-table, 1kB. 
    00000400-000020FB	The bootloader. It can decompress the compressed
			part of the filesystems. ca. 8kb. 
    000020FC-000043FF	Empty. 0x00, ca. 8kb. Seems to belong to
			the bootloader. 
    00004400-000103FF	Writeable area. is 48 kb. filesystem unknown
			but looks primitive. two utilities (each 7kb) 
			in /bin know how to handle that. 
    00010400...		Compressed and readonly. Contains:
	/dev/igf1	/-filesystem. ext2, 20 MB
	/dev/igf2	/usr-filesystem, ext2
	/dev/igf3	/usr3-filesystem, ext2
	/dev/igf4	(possibly)
    looks like it's realised with some kind of a loop-mount
    filesystem (probably called cromfs) which decompresses on 
    the fly. I tried with cramfs, but either this isn't the same
    or more likely, I haven't found the right start of the file.

Cheers
Peter
(Doh, 15kbit executable, seems possible with objdump...)