| // 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"; |