Re: "unhandled relocation type 18" ???

At 11:22 AM 3/6/01 +0100, Franz Sirl wrote:

At 09:02 06.03.2001, Wolfgang Denk wrote:

quoted

In message [ref]
you wrote:

quoted

On Mon, 5 Mar 2001, Wolfgang Denk wrote:

quoted

when trying to "insmod"

a  kernel  module  that  uses  floating-point

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functions  like  "sin", we get error messages:

    unhandled relocation type 18

Does it also complain about a missing symbol for `sin'?

No, it does not.

We made sure to link the module with  the  math  library  to  resolve
those references.

But we still get those  error  messages;  the  first  is  always  for
lshrdi3  -  which is linked with our module (but also provided by the
kernel - could there be any problems?), and then we get a  long  list
of errors for pack and unpack functions - whatever they are.

18 is a PLTREL24 relocation, so a b/bl has to be involved, but it
should be
a REL24 relocation, the PLT usage points to compilation of a module with
-fpic/-fPIC?

Franz.

Ah-ha, these are good clues.  This sounds to me like an unresolved
reference (most likely) or a branch too far.  An unresolved reference
can cause the linker to try to make the branch go beyond the legal
limits (+/-32MBytes) or you may simply have too large a program for the
relative branches.  I would suggest figuring out the lshrdi3, pack and
unpack errors first.

gvb

Disclaimer: This is speculation based on cruel past experience.


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