1 // SPDX-License-Identifier: GPL-2.0 2 #include "vmlinux.h" 3 #include <bpf/bpf_helpers.h> 4 #include <bpf/bpf_tracing.h> 5 6 char LICENSE[] SEC("license") = "GPL"; 7 8 void *user_ptr; 9 int retval; 10 11 SEC("fentry.s") 12 int BPF_PROG(fentry_xdp) 13 { 14 char buff[64]; 15 16 retval = bpf_copy_from_user(buff, sizeof(buff), user_ptr); 17 return 0; 18 } 19