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 7char _license[] SEC("license") = "GPL"; 8 9extern const void bpf_fentry_test1 __ksym; 10extern const void bpf_fentry_test2 __ksym; 11extern const void bpf_fentry_test3 __ksym; 12extern const void bpf_fentry_test4 __ksym; 13extern const void bpf_fentry_test5 __ksym; 14extern const void bpf_fentry_test6 __ksym; 15extern const void bpf_fentry_test7 __ksym; 16extern const void bpf_fentry_test8 __ksym; 17 18int pid = 0; 19bool 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 39static 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 */ 80SEC("fentry/bpf_modify_return_test") 81int BPF_PROG(trigger) 82{ 83 return 0; 84} 85 86SEC("kprobe.multi/bpf_fentry_tes??") 87int test_kprobe(struct pt_regs *ctx) 88{ 89 kprobe_multi_check(ctx, false); 90 return 0; 91} 92 93SEC("kretprobe.multi/bpf_fentry_test*") 94int test_kretprobe(struct pt_regs *ctx) 95{ 96 kprobe_multi_check(ctx, true); 97 return 0; 98} 99 100SEC("kprobe.multi") 101int test_kprobe_manual(struct pt_regs *ctx) 102{ 103 kprobe_multi_check(ctx, false); 104 return 0; 105} 106 107SEC("kretprobe.multi") 108int test_kretprobe_manual(struct pt_regs *ctx) 109{ 110 kprobe_multi_check(ctx, true); 111 return 0; 112} 113 114extern const void bpf_testmod_fentry_test1 __ksym; 115extern const void bpf_testmod_fentry_test2 __ksym; 116extern 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 126static 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 150SEC("kprobe.multi") 151int test_kprobe_testmod(struct pt_regs *ctx) 152{ 153 kprobe_multi_testmod_check(ctx, false); 154 return 0; 155} 156 157SEC("kretprobe.multi") 158int test_kretprobe_testmod(struct pt_regs *ctx) 159{ 160 kprobe_multi_testmod_check(ctx, true); 161 return 0; 162} 163