Generating Instrumentation for Other Computers

[Arkady <arkady dot miasnikov at gmail dot com>]

Hi,

I am trying to create a build environment for generating the kernel
modules for other computers. My goal is to have a chroot with multiple
kernel-devel/debuginfo packages.
I started by following
https://sourceware.org/systemtap/SystemTap_Beginners_Guide/cross-compiling.html
I downloaded and installed packages for 2.6.32-71.7.1.el6.x86_64 (a
random pick of the kernel) manually using

rpm --force  -ivh  kernel-debuginfo-2.6.32-71.7.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-71.7.1.el6.x86_64.rpm
kernel-devel-2.6.32-71.7.1.el6.x86_64.rpm

After that I tried

stap -r 2.6.32-71.7.1.el6.x86_64 -p4 <script_name>.stp

I am getting

semantic error: missing x86_64 kernel/module debuginfo [man
warning::debuginfo] under
'/home/arkady/debuginfo/usr/src/kernels/2.6.32-71.7.1.el6.x86_64'

I tried to specify --root in the command to rpm and avoid --force this
way. STAP command is
stap -r <root here>/usr/src/kernels/2.6.32-71.7.1.el6.x86_64 -p4
<script_name>.stp

It did not solve the problem. This is how my
usr/src/kernels/2.6.32-71.7.1.el6.x86_64/ looks like

Makefile   Module.symvers  arch   crypto   firmware  include  ipc
lib  net      scripts   sound  usr Makefile.common  System.map
block  drivers  fs        init     kernel  mm   samples  security
tools  virt

and /usr/src/kernels/2.6.32-642.el6.x86_64/kernel/

Kconfig.freezer  Kconfig.hz  Kconfig.preempt  Makefile  events  gcov
irq  power  time  trace

I went on to the file dwflpp.cxx and tried to figure out what is
missing - my theory was that some symlink can solve the problem. From
the source code it appears that dwfl_module_getdwarf() fails to parse
the module (or found it).

What module?

Thank you, Arkady.