1f7a11eecSJiri Olsa // SPDX-License-Identifier: GPL-2.0 2f7a11eecSJiri Olsa #include <linux/bpf.h> 3f7a11eecSJiri Olsa #include <bpf/bpf_helpers.h> 4f7a11eecSJiri Olsa #include <bpf/bpf_tracing.h> 5f7a11eecSJiri Olsa #include <stdbool.h> 6f7a11eecSJiri Olsa 7f7a11eecSJiri Olsa char _license[] SEC("license") = "GPL"; 8f7a11eecSJiri Olsa 9f7a11eecSJiri Olsa extern const void bpf_fentry_test1 __ksym; 10f7a11eecSJiri Olsa extern const void bpf_fentry_test2 __ksym; 11f7a11eecSJiri Olsa extern const void bpf_fentry_test3 __ksym; 12f7a11eecSJiri Olsa extern const void bpf_fentry_test4 __ksym; 13f7a11eecSJiri Olsa extern const void bpf_fentry_test5 __ksym; 14f7a11eecSJiri Olsa extern const void bpf_fentry_test6 __ksym; 15f7a11eecSJiri Olsa extern const void bpf_fentry_test7 __ksym; 16f7a11eecSJiri Olsa extern const void bpf_fentry_test8 __ksym; 17f7a11eecSJiri Olsa 18f7a11eecSJiri Olsa int pid = 0; 192c6401c9SJiri Olsa bool test_cookie = false; 20f7a11eecSJiri Olsa 21f7a11eecSJiri Olsa __u64 kprobe_test1_result = 0; 22f7a11eecSJiri Olsa __u64 kprobe_test2_result = 0; 23f7a11eecSJiri Olsa __u64 kprobe_test3_result = 0; 24f7a11eecSJiri Olsa __u64 kprobe_test4_result = 0; 25f7a11eecSJiri Olsa __u64 kprobe_test5_result = 0; 26f7a11eecSJiri Olsa __u64 kprobe_test6_result = 0; 27f7a11eecSJiri Olsa __u64 kprobe_test7_result = 0; 28f7a11eecSJiri Olsa __u64 kprobe_test8_result = 0; 29f7a11eecSJiri Olsa 30f7a11eecSJiri Olsa __u64 kretprobe_test1_result = 0; 31f7a11eecSJiri Olsa __u64 kretprobe_test2_result = 0; 32f7a11eecSJiri Olsa __u64 kretprobe_test3_result = 0; 33f7a11eecSJiri Olsa __u64 kretprobe_test4_result = 0; 34f7a11eecSJiri Olsa __u64 kretprobe_test5_result = 0; 35f7a11eecSJiri Olsa __u64 kretprobe_test6_result = 0; 36f7a11eecSJiri Olsa __u64 kretprobe_test7_result = 0; 37f7a11eecSJiri Olsa __u64 kretprobe_test8_result = 0; 38f7a11eecSJiri Olsa 397f0059b5SAlexei Starovoitov extern bool CONFIG_X86_KERNEL_IBT __kconfig __weak; 407f0059b5SAlexei Starovoitov 41f7a11eecSJiri Olsa static void kprobe_multi_check(void *ctx, bool is_return) 42f7a11eecSJiri Olsa { 43f7a11eecSJiri Olsa if (bpf_get_current_pid_tgid() >> 32 != pid) 44f7a11eecSJiri Olsa return; 45f7a11eecSJiri Olsa 462c6401c9SJiri Olsa __u64 cookie = test_cookie ? bpf_get_attach_cookie(ctx) : 0; 477f0059b5SAlexei Starovoitov __u64 addr = bpf_get_func_ip(ctx) - (CONFIG_X86_KERNEL_IBT ? 4 : 0); 48f7a11eecSJiri Olsa 492c6401c9SJiri Olsa #define SET(__var, __addr, __cookie) ({ \ 502c6401c9SJiri Olsa if (((const void *) addr == __addr) && \ 512c6401c9SJiri Olsa (!test_cookie || (cookie == __cookie))) \ 52f7a11eecSJiri Olsa __var = 1; \ 53f7a11eecSJiri Olsa }) 54f7a11eecSJiri Olsa 55f7a11eecSJiri Olsa if (is_return) { 562c6401c9SJiri Olsa SET(kretprobe_test1_result, &bpf_fentry_test1, 8); 572c6401c9SJiri Olsa SET(kretprobe_test2_result, &bpf_fentry_test2, 7); 582c6401c9SJiri Olsa SET(kretprobe_test3_result, &bpf_fentry_test3, 6); 592c6401c9SJiri Olsa SET(kretprobe_test4_result, &bpf_fentry_test4, 5); 602c6401c9SJiri Olsa SET(kretprobe_test5_result, &bpf_fentry_test5, 4); 612c6401c9SJiri Olsa SET(kretprobe_test6_result, &bpf_fentry_test6, 3); 622c6401c9SJiri Olsa SET(kretprobe_test7_result, &bpf_fentry_test7, 2); 632c6401c9SJiri Olsa SET(kretprobe_test8_result, &bpf_fentry_test8, 1); 64f7a11eecSJiri Olsa } else { 652c6401c9SJiri Olsa SET(kprobe_test1_result, &bpf_fentry_test1, 1); 662c6401c9SJiri Olsa SET(kprobe_test2_result, &bpf_fentry_test2, 2); 672c6401c9SJiri Olsa SET(kprobe_test3_result, &bpf_fentry_test3, 3); 682c6401c9SJiri Olsa SET(kprobe_test4_result, &bpf_fentry_test4, 4); 692c6401c9SJiri Olsa SET(kprobe_test5_result, &bpf_fentry_test5, 5); 702c6401c9SJiri Olsa SET(kprobe_test6_result, &bpf_fentry_test6, 6); 712c6401c9SJiri Olsa SET(kprobe_test7_result, &bpf_fentry_test7, 7); 722c6401c9SJiri Olsa SET(kprobe_test8_result, &bpf_fentry_test8, 8); 73f7a11eecSJiri Olsa } 74f7a11eecSJiri Olsa 75f7a11eecSJiri Olsa #undef SET 76f7a11eecSJiri Olsa } 77f7a11eecSJiri Olsa 78f7a11eecSJiri Olsa /* 79f7a11eecSJiri Olsa * No tests in here, just to trigger 'bpf_fentry_test*' 80f7a11eecSJiri Olsa * through tracing test_run 81f7a11eecSJiri Olsa */ 82f7a11eecSJiri Olsa SEC("fentry/bpf_modify_return_test") 83f7a11eecSJiri Olsa int BPF_PROG(trigger) 84f7a11eecSJiri Olsa { 85f7a11eecSJiri Olsa return 0; 86f7a11eecSJiri Olsa } 87f7a11eecSJiri Olsa 88f7a11eecSJiri Olsa SEC("kprobe.multi/bpf_fentry_tes??") 89f7a11eecSJiri Olsa int test_kprobe(struct pt_regs *ctx) 90f7a11eecSJiri Olsa { 91f7a11eecSJiri Olsa kprobe_multi_check(ctx, false); 92f7a11eecSJiri Olsa return 0; 93f7a11eecSJiri Olsa } 94f7a11eecSJiri Olsa 95f7a11eecSJiri Olsa SEC("kretprobe.multi/bpf_fentry_test*") 96f7a11eecSJiri Olsa int test_kretprobe(struct pt_regs *ctx) 97f7a11eecSJiri Olsa { 98f7a11eecSJiri Olsa kprobe_multi_check(ctx, true); 99f7a11eecSJiri Olsa return 0; 100f7a11eecSJiri Olsa } 101*32c03c49SAndrii Nakryiko 102*32c03c49SAndrii Nakryiko SEC("kprobe.multi") 103*32c03c49SAndrii Nakryiko int test_kprobe_manual(struct pt_regs *ctx) 104*32c03c49SAndrii Nakryiko { 105*32c03c49SAndrii Nakryiko kprobe_multi_check(ctx, false); 106*32c03c49SAndrii Nakryiko return 0; 107*32c03c49SAndrii Nakryiko } 108*32c03c49SAndrii Nakryiko 109*32c03c49SAndrii Nakryiko SEC("kretprobe.multi") 110*32c03c49SAndrii Nakryiko int test_kretprobe_manual(struct pt_regs *ctx) 111*32c03c49SAndrii Nakryiko { 112*32c03c49SAndrii Nakryiko kprobe_multi_check(ctx, true); 113*32c03c49SAndrii Nakryiko return 0; 114*32c03c49SAndrii Nakryiko } 115