emit_rsb_call
if (emit_rsb_call(&prog, bpf_trampoline_enter(p), image + (prog - (u8 *)rw_image)))
if (emit_rsb_call(&prog, p->bpf_func, image + (prog - (u8 *)rw_image)))
if (emit_rsb_call(&prog, bpf_trampoline_exit(p), image + (prog - (u8 *)rw_image)))
if (emit_rsb_call(&prog, __bpf_tramp_enter,
if (emit_rsb_call(&prog, orig_call, image + (prog - (u8 *)rw_image))) {
if (emit_rsb_call(&prog, __bpf_tramp_exit, image + (prog - (u8 *)rw_image))) {