// SPDX-License-Identifier: GPL-2.0 #include <linux/bpf.h> #include <bpf/bpf_helpers.h> #include <bpf/bpf_tracing.h> int val = 0; SEC("fentry/test_1") int BPF_PROG(fentry_test_1, __u64 *st_ops_ctx) { __u64 state; /* Read the traced st_ops arg1 which is a pointer */ bpf_probe_read_kernel(&state, sizeof(__u64), (void *)st_ops_ctx); /* Read state->val */ bpf_probe_read_kernel(&val, sizeof(__u32), (void *)state); return 0; } char _license[] SEC("license") = "GPL";