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1// SPDX-License-Identifier: GPL-2.02#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 SET74}75 76/*77 * No tests in here, just to trigger 'bpf_fentry_test*'78 * through tracing test_run79 */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