kernel.git/tools/bpf/bpftool/btf.c, branch linux-5.3.y

bpftool: add C output format option to btf dump subcommand

2019-05-24T21:05:58Z

Utilize new libbpf's btf_dump API to emit BTF as a C definitions. Acked-by: Jakub Kicinski Signed-off-by: Andrii Nakryiko Reviewed-by: Quentin Monnet Signed-off-by: Alexei Starovoitov

bpftool: use libbpf's btf__parse_elf API

2019-05-24T21:05:57Z

Use btf__parse_elf() API, provided by libbpf, instead of implementing ELF parsing by itself. Signed-off-by: Andrii Nakryiko Signed-off-by: Alexei Starovoitov

bpftool: fix BTF raw dump of FWD's fwd_kind

2019-05-17T12:21:29Z

kflag bit determines whether FWD is for struct or union. Use that bit. Fixes: c93cc69004df ("bpftool: add ability to dump BTF types") Signed-off-by: Andrii Nakryiko Signed-off-by: Daniel Borkmann

bpftool: add ability to dump BTF types

2019-04-26T04:45:14Z

Add new `btf dump` sub-command to bpftool. It allows to dump human-readable low-level BTF types representation of BTF types. BTF can be retrieved from few different sources: - from BTF object by ID; - from PROG, if it has associated BTF; - from MAP, if it has associated BTF data; it's possible to narrow down types to either key type, value type, both, or all BTF types; - from ELF file (.BTF section). Output format mostly follows BPF verifier log format with few notable exceptions: - all the type/field/param/etc names are enclosed in single quotes to allow easier grepping and to stand out a little bit more; - FUNC_PROTO output follows STRUCT/UNION/ENUM format of having one line per each argument; this is more uniform and allows easy grepping, as opposed to succinct, but inconvenient format that BPF verifier log is using. Cc: Daniel Borkmann Cc: Alexei Starovoitov Cc: Yonghong Song Cc: Martin KaFai Lau Cc: Song Liu Cc: Arnaldo Carvalho de Melo Acked-by: Yonghong Song Signed-off-by: Andrii Nakryiko Signed-off-by: Alexei Starovoitov