Re: use of EXPORT_SYMBOL()

[Sabyasachi Pradhan <spradhan@xxxxxxxxxxxxx>]

Hi Fawad,

      thanks for the reply. I got the error when I did "make bzImage" on
my kernel. The error was
"this_object_must_be_defined_as_export_objs_in_the_Makefile".
For this I added an extra "super.o" to export-objs in the Makefile. By the
way I have the config_modversions off in my kernel. Has this anything to
do with the error?

regards,

--sabyasachi

On Mon, 5 Dec 2005, Fawad Lateef wrote:

> On 12/5/05, Sabyasachi Pradhan <spradhan@xxxxxxxxxxxxx> wrote:
> >
> >     To compile the kernel properly I had to make a change to the Makefile
> > in linux/fs/ to add a new entry super.o to extern-obj's. I was checking
> > the exported symbols in my kernel use /proc/ksyms and just wanted to know
> > what the string appearing before the symbol signify, is it the address in
> > memory ? Can I use the exported synbol directly in my program or do I have
> > to make any more changes ? Thanks.
> >
>
> I don't think (and also I never need to) for exporting symbol changes
> in Makefile is required. Are you getting some error or the symbol is
> not exported after rebooting to the recompiled kernel ?
>
> The hex string before symbol in ksyms is actually the memory address
> (virtual) of where it is located and the string after symbol name like
> _Rxxxxx is the version related to that symbol for the running compiled
> kernel (and I saw this _Rxxxxx different on different machines having
> the same kernel with same configuration options) (CMIIW)
>
> If your symbol exists/exported in ksyms (with any other string
> appended to it)  then you can access it directly in you module, might
> need to redefine is with extern for removing compilation warning !
>
> --
> Fawad Lateef
>
> --
> Kernelnewbies: Help each other learn about the Linux kernel.
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>
>

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