semantic error: not accessible at this address

Frank Ch. Eigler fche@redhat.com
Fri Sep 27 23:04:00 GMT 2013


Hi -

> > Also, the output of stap-report (pasted somewhere online) would be
> > helpful.
> 
> Here it is:
>  https://gist.github.com/vincentbernat/8e50f9156f03184cde40
> [...]

This sounds a little bit like http://sourceware.org/PR15123, because
your kernel is compiled with CONFIG_HAVE_FENTRY=Y but is built with a
buggy gcc version.  If so, stap 2.3 is supposed to have a workaround,
but perhaps it's not working for you.

The extra information that would be handy is:

% stap --vp 03 -L 'kernel.function("vfs_write")'
% readelf -w ../vmlinux # like you had, but focusing on location list item
                        # (offset) [5ec5ff] from .debug_loc

- FChE



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