libbpf: add btf__parse_elf API to load .BTF and .BTF.ext

Browse source

Loading BTF and BTF.ext from ELF file is a common need. Instead of
requiring every user to re-implement it, let's provide this API from
libbpf itself. It's mostly copy/paste from `bpftool btf dump`
implementation, which will be switched to libbpf's version in next
patch. btf__parse_elf allows to load BTF and optionally BTF.ext.
This is also useful for tests that need to load/work with BTF, loaded
from test ELF files.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

...

This commit is contained in:

Andrii Nakryiko 2019-05-24 11:58:57 -07:00 • committed by Alexei Starovoitov

parent 1d7a08b3bd

commit e6c64855fd

3 changed files with 135 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

128

tools/lib/bpf/btf.c

View file

2

tools/lib/bpf/btf.h

View file

5

tools/lib/bpf/libbpf.map

View file