Re: [PATCH dwarves v3 0/2] btf: support BTF_KIND_ENUM64

[Jiri Olsa <olsajiri@gmail.com>]

On Wed, Jun 29, 2022 at 06:44:52PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Wed, Jun 29, 2022 at 12:12:13AM -0700, Yonghong Song escreveu:
> > Add support for enum64. For 64-bit enumerator value,
> > previously, the value is truncated into 32bit, e.g.,
> > for the following enum in linux uapi bpf.h,
> >   enum {
> >         BPF_F_INDEX_MASK                = 0xffffffffULL,
> >         BPF_F_CURRENT_CPU               = BPF_F_INDEX_MASK,
> >   /* BPF_FUNC_perf_event_output for sk_buff input context. */
> >         BPF_F_CTXLEN_MASK               = (0xfffffULL << 32),
> >   };    
> 
> Applied, added the entry for skip generating enums to the man page,
> added support to the pahole BTF loader, used the new pahole to build
> bpf-next/master, all seems ok, pushing to next on git.kernel.org so that
> the libbpf github CI can give it a go.
> 
> To build with torvalds/master one has to add --skip_encoding_btf_enum64,
> I think, haven't tested with it, without it isn't working, libbpf
> complains at that btfids tool.
> 
> Please check/test what is in there now:
> 
>   git://git.kernel.org/pub/scm/devel/pahole/pahole.git next
>   https://git.kernel.org/pub/scm/devel/pahole/pahole.git/log/?h=next
> 
> Unless someone screams I plan pushing out a new release, update fedora
> packages, etc early next week its overdue by now.

I used this new pahole in kernel build and it looks ok,
but I'm getting following warning:

  BTFIDS  vmlinux
WARN: resolve_btfids: unresolved symbol mptcp_sock

might be specific to my .config, I'll check and let you know

jirka