Re: [uml-devel] kernel module support broken on x86-64?

[juergen.kadidlo@exasol.com]

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Boaz Harrosh wrote:

>juergen.kadidlo@exasol.com wrote:
>  
>
>>Hi!
>>
>> I've compiled an UML kernel based on 2.6.25 but loading kernel modules 
>>seems to be broken. No matter which module I try to load the output 
>>looks similar to this:
>>
>> overflow in relocation type 11 val 80836d41
>>'loop' likely not compiled with -mcmodel=kernel
>>
>>After searching for a while I found some threads from 2006 discussing 
>>this issue, e.g.:
>>http://www.mail-archive.com/user-mode-linux-devel@lists.sourceforge.net/msg03693.html
>>and
>>http://marc.info/?l=user-mode-linux-devel&m=115125101012707&w=2
>>
>>As Andi Kleen has mentioned in a mail from the first thread, simply 
>>appending "-mcmodel=kernel" to the KBUILD_CFLAGS does not work (I tried 
>>it anyway and can confirm his statement ;)
>>
>>Since I could not find any solution I've decided to write this mail and 
>>ask about the current state of this issue and of course for a solution! 
>>I simply don't want to believe that there is no loadable module support 
>>for UML in 2008...
>>
>>Regards
>>JK
>>
>>    
>>
>
>Every thing is fine down here. What host Kernel-gcc-glibc / uml-gcc-glibc
>are you using?
>
>I'm using out-of-tree modules with uml for every kernel since 2.6.19.
>I have both Host and UML as x86_64 on FC7 with gcc 4.1.2
>
>Boaz
>
>  
>
I'm glad to here that the bug has been fixed. Anyway, it does not work 
with my configuration:

 - CentOS 5.1 as host system and UML root fs
 - Kernel 2.6.25.4 (vanilla, but config taken from the CentOS kernel)
 - GCC 4.1.2
 - GLIBC 2.5

Regards
JK







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