Re: [microblaze-uclinux] Block device driver

[John Williams <jwilliams@xxxxxxxxxxxxxx>]

Hi Pavel,

When using loadable modules, make sure you disable module symbol 
versioning - under kernel config menu -> loadable module support -> Set 
version information (make sure it is OFF)

Regards,

John

Pavel Ivanchenko wrote:
> Hello.
> I'm trying write driver to MMC card.
> Begin with examples from "Linux Device Drivers" book.
> It have block driver example "sbull - Simple Block Utility for Loading 
> Localities" (attach to mail).
> I creat next Make file to compile object file:
>
>     ROOTDIR=/usr/src/uClinux-dist
>     UCLINUX_BUILD_USER=1
>     include $(ROOTDIR)/.config
>     LIBCDIR = $(CONFIG_LIBCDIR)
>     include $(ROOTDIR)/config.arch
>     CFLAGS += -D__KERNEL__ -DMODULE -DLINUX 
>     sbull.o: sbull.c 
>      $(CC) $(CFLAGS) -c sbull.c
>     clean:
>      rm -f *.o core
>      
>
> Some warning printing after compile, but object file create.
> I'm dowmload it to /var and try "insmod ./sbull.o"
> But return:
> Using ./sbull.o
> insmod: unresolved symbol divsi3_proc
> insmod: unresolved symbol mulsi3_proc
>                           
>  
> Please prompt direction to resolve this.
> I think, I do not turn on some elements of kernel.
>  
> Thank, Pavel.

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