How to find "Unresolved Symbols"

How to find "Unresolved Symbols"

[Budde, Marco]

Hi,

I am working on a larger kernel module.
This module will be based on a lot of
portable code, for which I have to implement
the OS depended code.

At the moment I can compile the complete
code into a module. Some of OS depended
code is still missing, but I do not get
any warnings from kbuild.

When I try to load the module, I can a really
strange error message:

 insmod: error inserting 'foo.o': -795847932 Function not implemented

What does that mean? How can I get a list
of missing symbols?

cu, Marco

-- 
telos EDV Systementwicklung GmbH

Re: How to find "Unresolved Symbols"

[linux-os (Dick Johnson)]

On Thu, 15 Sep 2005, Budde, Marco wrote:

> Hi,
>
> I am working on a larger kernel module.
> This module will be based on a lot of
> portable code, for which I have to implement
> the OS depended code.
>
> At the moment I can compile the complete
> code into a module. Some of OS depended
> code is still missing, but I do not get
> any warnings from kbuild.
>
> When I try to load the module, I can a really
> strange error message:
>
> insmod: error inserting 'foo.o': -795847932 Function not implemented
>
> What does that mean? How can I get a list
> of missing symbols?
>
> cu, Marco
>

Upgrade your module tools, probably also your build procedure.



Cheers,
Dick Johnson
Penguin : Linux version 2.6.13 on an i686 machine (5589.53 BogoMips).
Warning : 98.36% of all statistics are fiction.
.
I apologize for the following. I tried to kill it with the above dot :

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Re: How to find "Unresolved Symbols"

[Fawad Lateef]

On 9/15/05, Budde, Marco <budde@telos.de> wrote:
> Hi,
> 
> I am working on a larger kernel module.
> This module will be based on a lot of
> portable code, for which I have to implement
> the OS depended code.
> 

Are you creating a module for multiple platforms or migrating an
existing one to new version ?? And what do u mean by OS dependent code
??? I think it might be Architecture dependent code !!!!

> At the moment I can compile the complete
> code into a module. Some of OS depended
> code is still missing, but I do not get
> any warnings from kbuild.
> 
> When I try to load the module, I can a really
> strange error message:
> 
>  insmod: error inserting 'foo.o': -795847932 Function not implemented
> 
> What does that mean? How can I get a list
> of missing symbols?
> 
> cu, Marco
> 

Plz tell which kernel version you are using and which distribution
!!!! b/c there is a probability that you distro might have old
modutils etc ......

-- 
Fawad Lateef

Re: How to find "Unresolved Symbols"

[Sam Ravnborg]

On Thu, Sep 15, 2005 at 02:47:02PM +0200, Budde, Marco wrote:
> Hi,
> 
> I am working on a larger kernel module.
> This module will be based on a lot of
> portable code, for which I have to implement
> the OS depended code.
> 
> At the moment I can compile the complete
> code into a module. Some of OS depended
> code is still missing, but I do not get
> any warnings from kbuild.
> 
> When I try to load the module, I can a really
> strange error message:
> 
>  insmod: error inserting 'foo.o': -795847932 Function not implemented
> 
> What does that mean? How can I get a list
> of missing symbols?

How do you compile the module?
I you use:
make dir/file.ko
then kbuild will warn you about undefined symbols.
Here I assume you only use standard methods in your kbuild file, and do
not play funny tricks with vermagic etc.

	Sam