[uml-devel] Missing exported symbols?

[uml-devel] Missing exported symbols?

[James Roper]

I'm still using the 2.6.8 uml patch release, and I'm getting heaps of errors 
complaining about unknown symbols.  In particular:
WARNING: ../mnt/ lib/modules/2.6.8-1um/kernel/fs/cifs/cifs.ko needs unknown 
symbol memmove
Which I need as I'm doing cifs development.  I saw an incremental 2.6.9-rc2 
patch that said it added heaps of exported symbols, is there anything for 
2.6.8?  Or is there a simple way to export the memmove symbol?

I guess compiling cifs into the kernel would fix the problem altogether, 
though wouldn't it...

James


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[uml-devel] Re: Missing exported symbols?

[Lars Kellogg-Stedman]

> I'm still using the 2.6.8 uml patch release, and I'm getting heaps of errors 
> complaining about unknown symbols.  In particular:
> WARNING: ../mnt/ lib/modules/2.6.8-1um/kernel/fs/cifs/cifs.ko needs unknown 
> symbol memmove

I'm seeing the same error (memmove undefined) while trying to build UML 
2.6.8.1.  In fact, I'm finding that most of the os_* functions appear to 
be undefined, as well, but it looks like I can make that error go away 
if I simply disable the hostfs support.

I understand that hostfs is in the middle of a rewrite...what's the last 
2.6.x kernel with stable hostfs support?

Thanks,

-- Lars



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[uml-devel] Re: Missing exported symbols?

[Lars Kellogg-Stedman]

> I'm seeing the same error (memmove undefined) while trying to build UML 
> 2.6.8.1.

FWIW, after removing support for externfs/hostfs and friends, the only 
remaining error is the missing memmove.  For example:

> WARNING: /tmp/myroot/lib/modules/2.6.8.1-1um/kernel/net/sunrpc/sunrpc.ko 
> needs unknown symbol memmove

-- Lars



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[uml-devel] Re: Missing exported symbols?

[Lars Kellogg-Stedman]

> I'm still using the 2.6.8 uml patch release, and I'm getting heaps of errors 
> complaining about unknown symbols.  In particular:
> WARNING: ../mnt/ lib/modules/2.6.8-1um/kernel/fs/cifs/cifs.ko needs unknown 
> symbol memmove

Adding:

#undef __HAVE_ARCH_MEMMOVE

to include/asm-um/string.h (after the two #include statements) will 
force UML to use the memmove() defined in lib/string.c.  I don't know if 
this is the right solution or not, but it appears to resolve the missing 
symbol problem.



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Re: [uml-devel] Re: Missing exported symbols?

[BlaisorBlade]

On Saturday 09 October 2004 20:17, Lars Kellogg-Stedman wrote:
> > I'm still using the 2.6.8 uml patch release, and I'm getting heaps of
> > errors complaining about unknown symbols.  In particular:
> > WARNING: ../mnt/ lib/modules/2.6.8-1um/kernel/fs/cifs/cifs.ko needs
> > unknown symbol memmove
>
> I'm seeing the same error (memmove undefined) while trying to build UML
> 2.6.8.1.  In fact, I'm finding that most of the os_* functions appear to
> be undefined, as well, but it looks like I can make that error go away
> if I simply disable the hostfs support.
>
> I understand that hostfs is in the middle of a rewrite...what's the last
> 2.6.x kernel with stable hostfs support?
Either 2.6.7-1um or the upcoming 2.6.9 release... you can try 2.6.9-rc2; nor 
2.6.9-rc3 (tested) nor 2.6.9-rc4 compile (I guess). However I'll fix the 
problem ASAP (I have just to send the patches).

-- 
Paolo Giarrusso, aka Blaisorblade
Linux registered user n. 292729


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Re: [uml-devel] Re: Missing exported symbols?

[BlaisorBlade]

On Saturday 09 October 2004 21:58, Lars Kellogg-Stedman wrote:
> > I'm still using the 2.6.8 uml patch release, and I'm getting heaps of
> > errors complaining about unknown symbols.  In particular:
> > WARNING: ../mnt/ lib/modules/2.6.8-1um/kernel/fs/cifs/cifs.ko needs
> > unknown symbol memmove
>
> Adding:
>
> #undef __HAVE_ARCH_MEMMOVE
>
> to include/asm-um/string.h (after the two #include statements) will
> force UML to use the memmove() defined in lib/string.c.  I don't know if
> this is the right solution or not, but it appears to resolve the missing
> symbol problem.
It does not change anything. memmove *is* defined by glibc. However, 
lib/string.c adds the "EXPORT_SYMBOL(memmove);" line, which is the correct 
line to add to arch/um/os-Linux/user_syms.c, after putting in the correct 
prototype.

Bye
-- 
Paolo Giarrusso, aka Blaisorblade
Linux registered user n. 292729


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Re: [uml-devel] Missing exported symbols?

[BlaisorBlade]

On Saturday 09 October 2004 02:57, James Roper wrote:
> I'm still using the 2.6.8 uml patch release, and I'm getting heaps of
> errors complaining about unknown symbols.  In particular:
> WARNING: ../mnt/ lib/modules/2.6.8-1um/kernel/fs/cifs/cifs.ko needs unknown
> symbol memmove
> Which I need as I'm doing cifs development.  I saw an incremental 2.6.9-rc2
> patch that said it added heaps of exported symbols, is there anything for
> 2.6.8?  Or is there a simple way to export the memmove symbol?

This patch also contains (at this moment) the needed export:

http://user-mode-linux.sourceforge.net/work/current/2.6/2.6.8.1-1um/patches/export

However, you could try the 2.6.9-rc2 kernel, or from 2.6.9-rc4-bk2 onwards. 
The patch, if needed, should apply as well, I guess (at least by hand). I 
think it was merged, however.

Bye
-- 
Paolo Giarrusso, aka Blaisorblade
Linux registered user n. 292729



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