https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113382
--- Comment #2 from John David Anglin <danglin at gcc dot gnu.org> --- We have: .word 0x86000004 ; btt_info: kind=6, kflag=1, vlen=4 This seems correct encoding: /* Encoding for struct btf_type.info. */ #define BTF_TYPE_INFO(kind, kflag, vlen) \ ((((kflag) ? 1 : 0 ) << 31) | ((kind) << 24) | ((vlen) & 0xffff)) Problem seems kflag.