On Fri, Sep 23, 2022 at 11:59:37PM +0800, SuHsueyu wrote: > Like the BEGIN_BPF_CMD_DECODER(BPF_MAP_LOOKUP_ELEM) in src/bpf.c, the > parameter "struct BPF_MAP_LOOKUP_ELEM_struct attr" have a field map_fd OK, but I still don't follow, what do you mean when you are saying that union bpf_attr.map_fd "may differ under tracee and tracer"? -- ldv