BPF_JIT_FJMP
flags |= BPF_JIT_FJMP;
fjmp = (flags & BPF_JIT_FJMP) != 0;
(BPF_JIT_FPKT | BPF_JIT_FMEM | BPF_JIT_FJMP | BPF_JIT_FLEN)
flags |= BPF_JIT_FJMP;
fjmp = (flags & BPF_JIT_FJMP) != 0;
(BPF_JIT_FPKT | BPF_JIT_FMEM | BPF_JIT_FJMP | BPF_JIT_FADK)