tree 140f329c224fbe8ee0b59c3db64d7aec459f5dbb
parent 16d1e00c7e8a4950e914223b3112144289a82913
author Larysa Zaremba <larysa.zaremba@intel.com> 1652444263 +0200
committer Andrii Nakryiko <andrii@kernel.org> 1652483273 -0700

bpftool: Use sysfs vmlinux when dumping BTF by ID

Currently, dumping almost all BTFs specified by id requires
using the -B option to pass the base BTF. For kernel module
BTFs the vmlinux BTF sysfs path should work.

This patch simplifies dumping by ID usage by loading
vmlinux BTF from sysfs as base, if base BTF was not specified
and the ID corresponds to a kernel module BTF.

Signed-off-by: Larysa Zaremba <larysa.zaremba@intel.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Alexander Lobakin <alexandr.lobakin@intel.com>
Link: https://lore.kernel.org/bpf/20220513121743.12411-1-larysa.zaremba@intel.com