Re: [PATCH bpf-next v4 0/6] bpf: BTF support for ksyms

Alexei Starovoitov
2020-09-30T04:36:14Z

On Tue, Sep 29, 2020 at 4:50 PM Hao Luo <haoluo@google.com> wrote:
>
> v3 -> v4:
> - Rebasing
> - Cast bpf_[per|this]_cpu_ptr's parameter to void __percpu * before
> passing into per_cpu_ptr.

Looks good, but doesn't work:
./test_progs -t ksyms_btf
test_ksyms_btf:PASS:kallsyms_fopen 0 nsec
test_ksyms_btf:PASS:ksym_find 0 nsec
test_ksyms_btf:PASS:kallsyms_fopen 0 nsec
test_ksyms_btf:PASS:ksym_find 0 nsec
test_ksyms_btf:PASS:btf_exists 0 nsec
libbpf: extern (ksym) 'bpf_prog_active': incompatible types, expected
[4] int int, but kernel has [18729] var bpf_user_rnd_state
libbpf: failed to load object 'test_ksyms_btf'
libbpf: failed to load BPF skeleton 'test_ksyms_btf': -22
test_ksyms_btf:FAIL:skel_open failed to open and load skeleton
#43 ksyms_btf:FAIL

I have the latest pahole from master. Any ideas?