On 25/10/2024 17:09, Alexei Starovoitov wrote: > On Thu, Oct 24, 2024 at 4:26 PM Andrii Nakryiko > <andrii.nakryiko@xxxxxxxxx> wrote: >> >>> >>> The good news is that already happens, provided you have the updated >>> pahole to handle distilled base generation. After building selftests I see >>> >>> $ objdump -h bpf_testmod.ko |grep BTF >>> 7 .BTF_ids 000001c8 0000000000000000 0000000000000000 00002c50 >>> 2**0 >>> 50 .BTF 000036f4 0000000000000000 0000000000000000 0006e048 >>> 2**0 >>> 51 .BTF.base 000004cc 0000000000000000 0000000000000000 0007173c >>> 2**0 >>> >> >> Indeed, after updating to the latest pahole master now I get >> .BTF.base, very nice. > > I pulled the latest pahole, rebuilt everything, > but still cannot get it to generate BTF.base. > > Any special trick needed? Hmm, should just work for bpf_testmod.ko as long as "pahole --supported_btf_features" reports "distilled_base" among the set of features. scripts/Makefile.btf should add that feature if KBUILD_EXTMOD is set, as it should be in the case of building bpf_testmod.ko. I'll double-check at my end with latest bpf-next, but it was working yesterday for me. Alan
