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 #include <stdbool.h> 6 #include "bpf_kfuncs.h" 7 8 char _license[] SEC("license") = "GPL"; 9 10 int pid = 0; 11 12 __u64 test_uprobe_1_result = 0; 13 __u64 test_uprobe_2_result = 0; 14 __u64 test_uprobe_3_result = 0; 15 16 static int check_cookie(__u64 val, __u64 *result) 17 { 18 __u64 *cookie; 19 20 if (bpf_get_current_pid_tgid() >> 32 != pid) 21 return 1; 22 23 cookie = bpf_session_cookie(); 24 25 if (bpf_session_is_return()) 26 *result = *cookie == val ? val : 0; 27 else 28 *cookie = val; 29 return 0; 30 } 31 32 SEC("uprobe.session//proc/self/exe:uprobe_multi_func_1") 33 int uprobe_1(struct pt_regs *ctx) 34 { 35 return check_cookie(1, &test_uprobe_1_result); 36 } 37 38 SEC("uprobe.session//proc/self/exe:uprobe_multi_func_2") 39 int uprobe_2(struct pt_regs *ctx) 40 { 41 return check_cookie(2, &test_uprobe_2_result); 42 } 43 44 SEC("uprobe.session//proc/self/exe:uprobe_multi_func_3") 45 int uprobe_3(struct pt_regs *ctx) 46 { 47 return check_cookie(3, &test_uprobe_3_result); 48 } 49