New files:

Modified files:
scripts/Makefile.btf
tools/lib/bpf/btf.c
tools/include/uapi/linux/btf.h
tools/bpf/bpftool/Documentation/bpftool-btf.rst
include/uapi/linux/btf.h
tools/lib/bpf/libbpf.map
tools/bpf/bpftool/btf.c
kernel/bpf/btf.c
tools/lib/bpf/btf.h
tools/bpf/bpftool/bash-completion/bpftool