bpf_trampoline_enter
enter_prog = (u64)bpf_trampoline_enter(p);
ret = emit_call(ctx, (const u64)bpf_trampoline_enter(p));
(unsigned long)bpf_trampoline_enter(p));
ret = emit_call((const u64)bpf_trampoline_enter(p), true, ctx);
EMIT6_PCREL_RILB_PTR(0xc0050000, REG_14, bpf_trampoline_enter(p));
if (emit_rsb_call(&prog, bpf_trampoline_enter(p), image + (prog - (u8 *)rw_image)))
bpf_trampoline_enter_t bpf_trampoline_enter(const struct bpf_prog *prog);