.arg5_type = ARG_CONST_STACK_SIZE,
};
-static const struct bpf_func_proto *kprobe_prog_func_proto(enum bpf_func_id func_id)
+static const struct bpf_func_proto *tracing_func_proto(enum bpf_func_id func_id)
{
switch (func_id) {
case BPF_FUNC_map_lookup_elem:
return &bpf_get_smp_processor_id_proto;
case BPF_FUNC_perf_event_read:
return &bpf_perf_event_read_proto;
+ default:
+ return NULL;
+ }
+}
+
+static const struct bpf_func_proto *kprobe_prog_func_proto(enum bpf_func_id func_id)
+{
+ switch (func_id) {
case BPF_FUNC_perf_event_output:
return &bpf_perf_event_output_proto;
case BPF_FUNC_get_stackid:
return &bpf_get_stackid_proto;
default:
- return NULL;
+ return tracing_func_proto(func_id);
}
}
.type = BPF_PROG_TYPE_KPROBE,
};
+static const struct bpf_func_proto *tp_prog_func_proto(enum bpf_func_id func_id)
+{
+ switch (func_id) {
+ case BPF_FUNC_perf_event_output:
+ case BPF_FUNC_get_stackid:
+ return NULL;
+ default:
+ return tracing_func_proto(func_id);
+ }
+}
+
+static bool tp_prog_is_valid_access(int off, int size, enum bpf_access_type type)
+{
+ if (off < sizeof(void *) || off >= PERF_MAX_TRACE_SIZE)
+ return false;
+ if (type != BPF_READ)
+ return false;
+ if (off % size != 0)
+ return false;
+ return true;
+}
+
+static const struct bpf_verifier_ops tracepoint_prog_ops = {
+ .get_func_proto = tp_prog_func_proto,
+ .is_valid_access = tp_prog_is_valid_access,
+};
+
+static struct bpf_prog_type_list tracepoint_tl = {
+ .ops = &tracepoint_prog_ops,
+ .type = BPF_PROG_TYPE_TRACEPOINT,
+};
+
static int __init register_kprobe_prog_ops(void)
{
bpf_register_prog_type(&kprobe_tl);
+ bpf_register_prog_type(&tracepoint_tl);
return 0;
}
late_initcall(register_kprobe_prog_ops);