libbpf: Skip well-known ELF sections when iterating ELF

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Skip and don't log ELF sections that libbpf knows about and ignores during ELF
processing. This allows to not unnecessarily log details about those ELF
sections and cleans up libbpf debug log. Ignored sections include DWARF data,
string table, empty .text section and few special (e.g., .llvm_addrsig)
useless sections.

With such ELF sections out of the way, log unrecognized ELF sections at
pr_info level to increase visibility.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200820231250.1293069-5-andriin@fb.com

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Andrii Nakryiko 2020-08-20 16:12:38 -07:00 • committed by Alexei Starovoitov

parent 819c23af56

commit 50e09460d9

1 changed files with 49 additions and 6 deletions

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tools/lib/bpf/libbpf.c

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