[linux-2.6-block.git] / samples / bpf / tracex6_kern.c

#include <linux/ptrace.h>
#include <linux/version.h>
#include <uapi/linux/bpf.h>
#include "bpf_helpers.h"

struct bpf_map_def SEC("maps") my_map = {
	.type = BPF_MAP_TYPE_PERF_EVENT_ARRAY,
	.key_size = sizeof(int),
	.value_size = sizeof(u32),
	.max_entries = 32,
};

SEC("kprobe/sys_write")
int bpf_prog1(struct pt_regs *ctx)
{
	u64 count;
	u32 key = bpf_get_smp_processor_id();
	char fmt[] = "CPU-%d   %llu\n";

	count = bpf_perf_event_read(&my_map, key);
	bpf_trace_printk(fmt, sizeof(fmt), key, count);

	return 0;
}

char _license[] SEC("license") = "GPL";
u32 _version SEC("version") = LINUX_VERSION_CODE;
Commit	Line	Data
5ed3ccbd	1	#include <linux/ptrace.h>
47efb302 KX	2	#include <linux/version.h>
	3	#include <uapi/linux/bpf.h>
	4	#include "bpf_helpers.h"
	5
	6	struct bpf_map_def SEC("maps") my_map = {
	7	.type = BPF_MAP_TYPE_PERF_EVENT_ARRAY,
	8	.key_size = sizeof(int),
	9	.value_size = sizeof(u32),
	10	.max_entries = 32,
	11	};
	12
	13	SEC("kprobe/sys_write")
	14	int bpf_prog1(struct pt_regs *ctx)
	15	{
	16	u64 count;
	17	u32 key = bpf_get_smp_processor_id();
	18	char fmt[] = "CPU-%d %llu\n";
	19
	20	count = bpf_perf_event_read(&my_map, key);
	21	bpf_trace_printk(fmt, sizeof(fmt), key, count);
	22
	23	return 0;
	24	}
	25
	26	char _license[] SEC("license") = "GPL";
	27	u32 _version SEC("version") = LINUX_VERSION_CODE;