Hi Jiri

On 12/29/20 18:34, Jiri Olsa wrote:

On Tue, Dec 29, 2020 at 03:13:52PM +0000, Qais Yousef wrote:

quoted

Hi

When I enable CONFIG_DEBUG_INFO_BTF I get the following error in the BTFIDS
stage

	FAILED unresolved symbol udp6_sock

I cross compile for arm64. My .config is attached.

I managed to reproduce the problem on v5.9 and v5.10. Plus 5.11-rc1.

Have you seen this before? I couldn't find a specific report about this
problem.

Let me know if you need more info.

hi,
this looks like symptom of the gcc DWARF bug we were
dealing with recently:

  https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97060
  https://lore.kernel.org/lkml/CAE1WUT75gu9G62Q9uAALGN6vLX=o7vZ9uhqtVWnbUV81DgmFPw@mail.gmail.com/#r (local)

what pahole/gcc version are you using?

I'm on gcc 9.3.0

	aarch64-linux-gnu-gcc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0

I was on pahole v1.17. I moved to v1.19 but I still see the same problem.

Thanks

--
Qais Yousef

we fixed pahole (v1.19) to workaround the issue and AFAIK
there's already gcc fix as well