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 7 char _license[] SEC("license") = "GPL"; 8 9 extern const void bpf_fentry_test1 __ksym; 10 extern const void bpf_fentry_test2 __ksym; 11 extern const void bpf_fentry_test3 __ksym; 12 extern const void bpf_fentry_test4 __ksym; 13 extern const void bpf_fentry_test5 __ksym; 14 extern const void bpf_fentry_test6 __ksym; 15 extern const void bpf_fentry_test7 __ksym; 16 extern const void bpf_fentry_test8 __ksym; 17 18 int pid = 0; 19 bool test_cookie = false; 20 21 __u64 kprobe_test1_result = 0; 22 __u64 kprobe_test2_result = 0; 23 __u64 kprobe_test3_result = 0; 24 __u64 kprobe_test4_result = 0; 25 __u64 kprobe_test5_result = 0; 26 __u64 kprobe_test6_result = 0; 27 __u64 kprobe_test7_result = 0; 28 __u64 kprobe_test8_result = 0; 29 30 __u64 kretprobe_test1_result = 0; 31 __u64 kretprobe_test2_result = 0; 32 __u64 kretprobe_test3_result = 0; 33 __u64 kretprobe_test4_result = 0; 34 __u64 kretprobe_test5_result = 0; 35 __u64 kretprobe_test6_result = 0; 36 __u64 kretprobe_test7_result = 0; 37 __u64 kretprobe_test8_result = 0; 38 39 static void kprobe_multi_check(void *ctx, bool is_return) 40 { 41 if (bpf_get_current_pid_tgid() >> 32 != pid) 42 return; 43 44 __u64 cookie = test_cookie ? bpf_get_attach_cookie(ctx) : 0; 45 __u64 addr = bpf_get_func_ip(ctx); 46 47 #define SET(__var, __addr, __cookie) ({ \ 48 if (((const void *) addr == __addr) && \ 49 (!test_cookie || (cookie == __cookie))) \ 50 __var = 1; \ 51 }) 52 53 if (is_return) { 54 SET(kretprobe_test1_result, &bpf_fentry_test1, 8); 55 SET(kretprobe_test2_result, &bpf_fentry_test2, 2); 56 SET(kretprobe_test3_result, &bpf_fentry_test3, 7); 57 SET(kretprobe_test4_result, &bpf_fentry_test4, 6); 58 SET(kretprobe_test5_result, &bpf_fentry_test5, 5); 59 SET(kretprobe_test6_result, &bpf_fentry_test6, 4); 60 SET(kretprobe_test7_result, &bpf_fentry_test7, 3); 61 SET(kretprobe_test8_result, &bpf_fentry_test8, 1); 62 } else { 63 SET(kprobe_test1_result, &bpf_fentry_test1, 1); 64 SET(kprobe_test2_result, &bpf_fentry_test2, 7); 65 SET(kprobe_test3_result, &bpf_fentry_test3, 2); 66 SET(kprobe_test4_result, &bpf_fentry_test4, 3); 67 SET(kprobe_test5_result, &bpf_fentry_test5, 4); 68 SET(kprobe_test6_result, &bpf_fentry_test6, 5); 69 SET(kprobe_test7_result, &bpf_fentry_test7, 6); 70 SET(kprobe_test8_result, &bpf_fentry_test8, 8); 71 } 72 73 #undef SET 74 } 75 76 /* 77 * No tests in here, just to trigger 'bpf_fentry_test*' 78 * through tracing test_run 79 */ 80 SEC("fentry/bpf_modify_return_test") 81 int BPF_PROG(trigger) 82 { 83 return 0; 84 } 85 86 SEC("kprobe.multi/bpf_fentry_tes??") 87 int test_kprobe(struct pt_regs *ctx) 88 { 89 kprobe_multi_check(ctx, false); 90 return 0; 91 } 92 93 SEC("kretprobe.multi/bpf_fentry_test*") 94 int test_kretprobe(struct pt_regs *ctx) 95 { 96 kprobe_multi_check(ctx, true); 97 return 0; 98 } 99 100 SEC("kprobe.multi") 101 int test_kprobe_manual(struct pt_regs *ctx) 102 { 103 kprobe_multi_check(ctx, false); 104 return 0; 105 } 106 107 SEC("kretprobe.multi") 108 int test_kretprobe_manual(struct pt_regs *ctx) 109 { 110 kprobe_multi_check(ctx, true); 111 return 0; 112 } 113 114 extern const void bpf_testmod_fentry_test1 __ksym; 115 extern const void bpf_testmod_fentry_test2 __ksym; 116 extern const void bpf_testmod_fentry_test3 __ksym; 117 118 __u64 kprobe_testmod_test1_result = 0; 119 __u64 kprobe_testmod_test2_result = 0; 120 __u64 kprobe_testmod_test3_result = 0; 121 122 __u64 kretprobe_testmod_test1_result = 0; 123 __u64 kretprobe_testmod_test2_result = 0; 124 __u64 kretprobe_testmod_test3_result = 0; 125 126 static void kprobe_multi_testmod_check(void *ctx, bool is_return) 127 { 128 if (bpf_get_current_pid_tgid() >> 32 != pid) 129 return; 130 131 __u64 addr = bpf_get_func_ip(ctx); 132 133 if (is_return) { 134 if ((const void *) addr == &bpf_testmod_fentry_test1) 135 kretprobe_testmod_test1_result = 1; 136 if ((const void *) addr == &bpf_testmod_fentry_test2) 137 kretprobe_testmod_test2_result = 1; 138 if ((const void *) addr == &bpf_testmod_fentry_test3) 139 kretprobe_testmod_test3_result = 1; 140 } else { 141 if ((const void *) addr == &bpf_testmod_fentry_test1) 142 kprobe_testmod_test1_result = 1; 143 if ((const void *) addr == &bpf_testmod_fentry_test2) 144 kprobe_testmod_test2_result = 1; 145 if ((const void *) addr == &bpf_testmod_fentry_test3) 146 kprobe_testmod_test3_result = 1; 147 } 148 } 149 150 SEC("kprobe.multi") 151 int test_kprobe_testmod(struct pt_regs *ctx) 152 { 153 kprobe_multi_testmod_check(ctx, false); 154 return 0; 155 } 156 157 SEC("kretprobe.multi") 158 int test_kretprobe_testmod(struct pt_regs *ctx) 159 { 160 kprobe_multi_testmod_check(ctx, true); 161 return 0; 162 } 163