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Re: error to run systemtap in an ARM platform
On 07/23/2011 06:55 PM, Zheng Da wrote:
> Hello,
>
> I'm still trying to fix the problem.
> semantic error: failed to retrieve return value location for vfs_write
> (/build/tegra2_seaboard/tmp/portage/sys-kernel/chromeos-kernel-9999/work/chromeos-kernel-9999/fs/read_write.c):
> identifier '$return' at read-write.stp:7:6
> source: if ($return > 0) {
> ^
> I'm pretty sure CONFIG_DEBUG_INFO is enabled, and in
> /build/tegra2_seaboard/tmp/portage/sys-kernel/chromeos-kernel-9999/work/chromeos-kernel-9999/build/tegra2_seaboard,
> a binary file vmlinux is 57MB. It should contain the debug information.
>
> (cr) zhengda@zdpc
> /build/tegra2_seaboard/tmp/portage/sys-kernel/chromeos-kernel-9999/work/chromeos-k
> ernel-9999/build/tegra2_seaboard $ ls -l vmlinux
> -rwxr-xr-x 1 zhengda portage 59419805 Jul 22 20:55 vmlinux
>
> How does systemtap use the debug information? When it compiles the
> script, does it need to read the debug information from the kernel
> image? or it needs to read the .obj files of the kernel?
> Any ideas how to debug the problem?
>
> Thanks,
> Da
I wonder if this might be Bug 440059 - Missing return value locations support for ARM in elfutils backend
https://bugzilla.redhat.com/show_bug.cgi?id=440059
How old is the version of elfutils you are using?
-Will