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