1// SPDX-License-Identifier: GPL-2.0
 2#include <linux/bpf.h>
 3#include <bpf/bpf_helpers.h>
 4#include <bpf/bpf_tracing.h>
 5
 6int val = 0;
 7
 8SEC("fentry/test_1")
 9int BPF_PROG(fentry_test_1, __u64 *st_ops_ctx)
10{
11	__u64 state;
12
13	/* Read the traced st_ops arg1 which is a pointer */
14	bpf_probe_read_kernel(&state, sizeof(__u64), (void *)st_ops_ctx);
15	/* Read state->val */
16	bpf_probe_read_kernel(&val, sizeof(__u32), (void *)state);
17
18	return 0;
19}
20
21char _license[] SEC("license") = "GPL";

 1// SPDX-License-Identifier: GPL-2.0
 2#include <linux/bpf.h>
 3#include <bpf/bpf_helpers.h>
 4#include <bpf/bpf_tracing.h>
 5
 6int val = 0;
 7
 8SEC("fentry/test_1")
 9int BPF_PROG(fentry_test_1, __u64 *st_ops_ctx)
10{
11	__u64 state;
12
13	/* Read the traced st_ops arg1 which is a pointer */
14	bpf_probe_read_kernel(&state, sizeof(__u64), (void *)st_ops_ctx);
15	/* Read state->val */
16	bpf_probe_read_kernel(&val, sizeof(__u32), (void *)state);
17
18	return 0;
19}
20
21char _license[] SEC("license") = "GPL";