[microblaze-uclinux] Module trouble

["Jaap de Jong" <jaap.dejong@xxxxxxxxx>]

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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