Re: porting driver to 2.6, partly solved

[LGW]

Randy.Dunlap wrote:

> On Wed, 27 Aug 2003 18:15:51 +0200 LGW <large@xxxxxxxxxxxxxx> wrote:
>
> | Alan Cox wrote:
> | 
> | >On Mer, 2003-08-27 at 16:34, LGW wrote:
> | >  
> | >
> | >>The driver is mostly a wrapper around a generic driver released by the 
> | >>manufacturer, and that's written in C++. But it worked like this for the 
> | >>2.4.x kernel series, so I think it has something todo with the new 
> | >>module loader code. Possibly ld misses something when linking the object 
> | >>specific stuff like constructors?
> | >>    
> | >>
> | >
> | >The new module loader is kernel side, it may well not know some of the
> | >C++ specific relocation types. 
> | >
> | To you think it's possible to remove those relocations completely, so 
> | that the whole C++ stuff is linked "without" any more open relocations?
>
> Hopefully Rusty will see this and make some comments on it.
>
> You could try using objdump to look for the item(s) that have this
> relocation type (0).  That might help to see what is causing it.
>
> Or you could modify the module loader to ignore relocation type 0...
> and see what happens.
>  
Hm objdump -r snd-echoaudio.ko gives about six records (of course many 
others):
R_386_NONE    *ABS*

I'm not really sure what they refer to. Or, I don't even know. I think 
that the driver uses some system functions and they are linked like 
that, or so? I had a look and R_386_NONE means "no relocation" - so it 
should be safe to ignore them?

Modifying the kernel module loader like

switch (reloc_type) {
...
 case R_386_NONE:
   break;
...
}

did the trick, but this feels like a really really really UGLY trick.

Of course the best thing would be to rewrite the whole stuff, as it is 
more than hacked together, but I don't have time to do so, know. At 
least the soundcard device appears and plays sound now. I'll see what 
time brings.

Thanks for your support,
 Lars


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