Re: [microblaze-uclinux] Module trouble

[John Williams <jwilliams@xxxxxxxxxxxxxx>]

Hi Jaap,

I think it would be helpful to untable two seperate issues:

1. mounting JFFS2 filesystems when jffs2 is built into the kernel or 
manually loaded with insmod

2. the module autoload / modprobe stuff.

So, regarding (1) - if you compile jffs2 into the kernel can you do a 
successful mkfs and mount?

What about if you manually insmod the jffs2 module?

It looks like you've got (2) resolved through your hacking.

Regards,

John

Jaap de Jong wrote:
> Hi,
>
> I'm observing some strange behaviour using petalinux-v0.20-rc3,
> microblaze & linux-2.4.x.
>
> The Makefile in the petalinux-dist directory at line 231:
>
>  $(MAKEARCH_KERNEL) -C $(LINUXDIR) INSTALL_MOD_PATH=$(ROMFSDIR)
> DEPMOD="../user/busybox/examples/depmod.pl -k vmlinux" modules_install;
> \
>
> depmod.pl is not called. It is not found and hence my target does not
> contain /lib/modules/modules.dep.
>
> It happens because of the symbolic link:
>
>     linux-2.4.x --> uClinux-2.4.x
>
> If I do the following:
>
> $ cd linux-2.4.x
> $ ls ..
> linux-2.6.x-petalogix petalinux-dist uClinux-2.4.x user-apps
>
> Replacing 
> 	DEPMOD="../user
> with 
> 	DEPMOD="$(ROMFSDIR)/user
> solves this problem.
> modules.dep looks good now.
> But it reveals the next problem...
>
> On the targetboard:
> # modprobe jffs2
> Using /lib/modules/2.4.32-uc0/kernel/lib/zlib_deflate/zlib_deflate.o
> insmod: unresolved symbol __umodsi3
> insmod: unresolved symbol __udivsi3
> Using /lib/modules/2.4.32-uc0/kernel/fs/jffs2/jffs2.o
> insmod: unresolved symbol __umodsi3
> insmod: unresolved symbol zlib_deflate_workspacesize
> insmod: unresolved symbol zlib_deflate
> insmod: unresolved symbol zlib_deflateInit_
> insmod: unresolved symbol __udivsi3
> insmod: unresolved symbol zlib_deflateEnd
> modprobe: failed to load module jffs2
> umodsi3 and udivsi3??
>
> I found some source; compiled, placed and insmod:
> See if it works now...
> # cd /tmp
> # mkfs.jffs2 --root=/etc/config --output=/dev/mtdblock4
> # mkdir j
> # mount -t jffs2 /dev/mtdblock4 j
> kmod: failed to exec /sbin/modprobe -s -k jffs2, errno = 2
> mount: Mounting /dev/mtdblock4 on /var/tmp/j failed: No such device
>
> Oops... Modprobe is in /bin instead of /sbin 
> Quick hack & changed that too...
> Next try:
> # cd /tmp
> # mkfs.jffs2 --root=/etc/config --output=x
> # netflash -bknr /dev/mtd4 x
> # mkdir j
> # mount -t jffs2 /dev/mtdblock4 j
> mount: Mounting /dev/mtdblock4 on /var/tmp/j failed: No such device
>
> That is where I'm stuck now. Don't know how to continue. 
> With all this workarounds: I'm probably doing something wrong...
> Any help is appreciated!
>
> Jaap de Jong
>
>
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