tools/perf/include/bpf/stdio.h

// SPDX-License-Identifier: GPL-2.0

#include <bpf/bpf.h>

struct bpf_map SEC("maps") __bpf_stdout__ = {
       .type = BPF_MAP_TYPE_PERF_EVENT_ARRAY,
       .key_size = sizeof(int),
       .value_size = sizeof(u32),
       .max_entries = __NR_CPUS__,
};

#define puts(from) \
	({ const int __len = sizeof(from); \
	   char __from[__len] = from; \
	   perf_event_output(args, &__bpf_stdout__, BPF_F_CURRENT_CPU, \
			  &__from, __len & (sizeof(from) - 1)); })