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Re: Generating Kernel module for Other Computers
- From: Arkady <arkady dot miasnikov at gmail dot com>
- To: Daniel Doron <danielmeirdoron at gmail dot com>
- Cc: systemtap at sourceware dot org
- Date: Sun, 2 Jul 2017 20:10:11 +0300
- Subject: Re: Generating Kernel module for Other Computers
- Authentication-results: sourceware.org; auth=none
- References: <CAFwN=+wqOCx0FL6+CdH3BZkiFaie_dVF161YFkNuck8O+kxY+A@mail.gmail.com>
You shall consider one of the following
* A dedicated virtual machine with the correct kernel version
(vagrant?) where you install the debug packages and STAP using
yum/apt-get
* A Docker container - this is what I am using - where you install
debug packages manually. You will have to fix some symbolic links.
On Sun, Jul 2, 2017 at 6:29 PM, Daniel Doron <danielmeirdoron@gmail.com> wrote:
> Hi,
>
> I am trying to automate the creation of the driver from one host for
> multiple computers.
> The purpose is:
> 1. compile the driver with the latest STAP version
> 2. automate it for multiple kernels at once
> 3. distribute the driver to each machine
>
> My approach was to use stap "-r" flag. So for example I would use my
> Arch Linux to download and extract all relevant source for Centos 6
> and compile my module for it.
>
> Centos 6.9:
> ---------------
> get the following packages:
> kernel-2.6.32-696.el6.x86_64.rpm
> kernel-debuginfo-2.6.32-696.3.2.el6.x86_64.rpm
> kernel-debuginfo-common-x86_64-2.6.32-696.3.2.el6.x86_64.rpm
> kernel-devel-2.6.32-696.el6.x86_64.rpm
>
> extract them to some location.
>
> then:
> ---
> export SYSTEMTAP_DEBUGINFO_PATH=/home/danield/Downloads/centos-2.6.32/usr/lib/debug/lib/modules
>
> soft link vmlinux for STAP
> ln -s ~/Downloads/centos-2.6.32/usr/lib/debug/lib/modules/2.6.32-696.3.2.el6.x86_64/vmlinux
> ~/Downloads/centos-2.6.32/usr/src/kernels/2.6.32-696.el6.x86_64/vmlinux
>
> sudo stap -vv -r
> /home/danield/Downloads/centos-2.6.32/usr/src/kernels/2.6.32-696.el6.x86_64
> -e 'probe vfs.read {exit()}' -m simple
>
>
> the error I get:
> include/linux/compiler-gcc.h:94:1: fatal error: linux/compiler-gcc7.h:
> No such file or directory
> #include gcc_header(__GNUC__)
>
> made me realize this is not good because STAP relies on the gcc
> version I use to get the header in the kernel. Of course I am using
> gcc 7 which doesn't exist for Centos 6.9 kernel' (latest version is
> 4.4.7)
>
> I could:
> 1. download the relevant gcc version and maybe pass CC=/usr/bin/gcc4
> stap -r ....
> 2. other suggestion?
>
>
> Thanks.
> Daniel.