libbpf: Support Debian in resolve_full_path()

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attach_probe selftest fails on Debian-based distros with `failed to
resolve full path for 'libc.so.6'`. The reason is that these distros
embraced multiarch to the point where even for the "main" architecture
they store libc in /lib/<triple>.

This is configured in /etc/ld.so.conf and in theory it's possible to
replicate the loader's parsing and processing logic in libbpf, however
a much simpler solution is to just enumerate the known library paths.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20220404225020.51029-1-iii@linux.ibm.com

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Ilya Leoshkevich 2022-04-05 00:50:20 +02:00 • committed by Andrii Nakryiko

parent d298761746

commit 568189310c

1 changed files with 39 additions and 1 deletions

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tools/lib/bpf/libbpf.c

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