1 // SPDX-License-Identifier: GPL-2.0
2 
3 #include <bpf.h>
4 
5 struct bpf_map SEC("maps") __bpf_stdout__ = {
6        .type = BPF_MAP_TYPE_PERF_EVENT_ARRAY,
7        .key_size = sizeof(int),
8        .value_size = sizeof(u32),
9        .max_entries = __NR_CPUS__,
10 };
11 
12 static int (*perf_event_output)(void *, struct bpf_map *, int, void *, unsigned long) =
13 	(void *)BPF_FUNC_perf_event_output;
14 
15 #define puts(from) \
16 	({ const int __len = sizeof(from); \
17 	   char __from[__len] = from; \
18 	   perf_event_output(args, &__bpf_stdout__, BPF_F_CURRENT_CPU, \
19 			  &__from, __len & (sizeof(from) - 1)); })
20