compiling BCC stype C code into ELF format
- Dominant language
- C
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- 10d 4h
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Description
I am trying to generate an ELF file from BCC compiler. I am able to generate an ELF file successfully, but it was not runnable. The current problem is with the "helpers" section. I have noticed that there is no "helpers" section in a clang compiled object file. Currently the error reports "libbpf: Program '.bpf.fn.xdp_root' contains unrecognized relo data pointing to section 3
Segmentation fault (core dumped)", and I am guessing the problem is with a helper function "bpf_tail_call". Does anyone have any insight?
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Research direction
Start by reproducing the BCC-to-ELF flow and inspecting the generated ELF's "helpers" section alongside the libbpf relocation error for .bpf.fn.xdp_root. Check whether bpf_tail_call is involved; done means the generated ELF is accepted and runnable without the unrecognized relocation or segmentation fault.
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Assessment
- Tech stack
- c, linux
- Domain
- compilers
- Issue type
- Bug
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100