#include <uapi/linux/bpf.h>
struct bpf_map_def {
       unsigned int type;
       unsigned int key_size;
       unsigned int value_size;
       unsigned int max_entries;
};
#define SEC(NAME) __attribute__((section(NAME), used))
static int (*get_smp_processor_id)(void) =
       (void *)BPF_FUNC_get_smp_processor_id;
static int (*perf_event_output)(void *, struct bpf_map_def *, int, void *, unsigned long) =
       (void *)BPF_FUNC_perf_event_output;
static int (*bpf_probe_read_str)(void *dst, int size, const void *unsafe_addr) =
       (void *)BPF_FUNC_probe_read_str;
static int (*trace_printk)(const char *fmt, int fmt_size, ...) =
	(void *)BPF_FUNC_trace_printk;

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

#define printf(msg) \
	({ char str[] = msg; perf_event_output(ctx, &__bpf_stdout__, get_smp_processor_id(), &str, sizeof(str)); })

char _license[] SEC("license") = "GPL";
int _version SEC("version") = LINUX_VERSION_CODE;