115 lines
3.0 KiB
C
115 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/bpf.h>
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_tracing.h>
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#include <stdbool.h>
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char _license[] SEC("license") = "GPL";
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extern const void bpf_fentry_test1 __ksym;
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extern const void bpf_fentry_test2 __ksym;
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extern const void bpf_fentry_test3 __ksym;
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extern const void bpf_fentry_test4 __ksym;
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extern const void bpf_fentry_test5 __ksym;
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extern const void bpf_fentry_test6 __ksym;
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extern const void bpf_fentry_test7 __ksym;
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extern const void bpf_fentry_test8 __ksym;
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int pid = 0;
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bool test_cookie = false;
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__u64 kprobe_test1_result = 0;
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__u64 kprobe_test2_result = 0;
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__u64 kprobe_test3_result = 0;
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__u64 kprobe_test4_result = 0;
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__u64 kprobe_test5_result = 0;
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__u64 kprobe_test6_result = 0;
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__u64 kprobe_test7_result = 0;
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__u64 kprobe_test8_result = 0;
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__u64 kretprobe_test1_result = 0;
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__u64 kretprobe_test2_result = 0;
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__u64 kretprobe_test3_result = 0;
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__u64 kretprobe_test4_result = 0;
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__u64 kretprobe_test5_result = 0;
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__u64 kretprobe_test6_result = 0;
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__u64 kretprobe_test7_result = 0;
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__u64 kretprobe_test8_result = 0;
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extern bool CONFIG_X86_KERNEL_IBT __kconfig __weak;
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static void kprobe_multi_check(void *ctx, bool is_return)
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{
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if (bpf_get_current_pid_tgid() >> 32 != pid)
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return;
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__u64 cookie = test_cookie ? bpf_get_attach_cookie(ctx) : 0;
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__u64 addr = bpf_get_func_ip(ctx) - (CONFIG_X86_KERNEL_IBT ? 4 : 0);
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#define SET(__var, __addr, __cookie) ({ \
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if (((const void *) addr == __addr) && \
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(!test_cookie || (cookie == __cookie))) \
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__var = 1; \
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})
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if (is_return) {
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SET(kretprobe_test1_result, &bpf_fentry_test1, 8);
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SET(kretprobe_test2_result, &bpf_fentry_test2, 2);
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SET(kretprobe_test3_result, &bpf_fentry_test3, 7);
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SET(kretprobe_test4_result, &bpf_fentry_test4, 6);
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SET(kretprobe_test5_result, &bpf_fentry_test5, 5);
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SET(kretprobe_test6_result, &bpf_fentry_test6, 4);
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SET(kretprobe_test7_result, &bpf_fentry_test7, 3);
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SET(kretprobe_test8_result, &bpf_fentry_test8, 1);
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} else {
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SET(kprobe_test1_result, &bpf_fentry_test1, 1);
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SET(kprobe_test2_result, &bpf_fentry_test2, 7);
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SET(kprobe_test3_result, &bpf_fentry_test3, 2);
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SET(kprobe_test4_result, &bpf_fentry_test4, 3);
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SET(kprobe_test5_result, &bpf_fentry_test5, 4);
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SET(kprobe_test6_result, &bpf_fentry_test6, 5);
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SET(kprobe_test7_result, &bpf_fentry_test7, 6);
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SET(kprobe_test8_result, &bpf_fentry_test8, 8);
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}
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#undef SET
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}
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/*
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* No tests in here, just to trigger 'bpf_fentry_test*'
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* through tracing test_run
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*/
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SEC("fentry/bpf_modify_return_test")
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int BPF_PROG(trigger)
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{
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return 0;
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}
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SEC("kprobe.multi/bpf_fentry_tes??")
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int test_kprobe(struct pt_regs *ctx)
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{
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kprobe_multi_check(ctx, false);
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return 0;
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}
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SEC("kretprobe.multi/bpf_fentry_test*")
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int test_kretprobe(struct pt_regs *ctx)
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{
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kprobe_multi_check(ctx, true);
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return 0;
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}
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SEC("kprobe.multi")
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int test_kprobe_manual(struct pt_regs *ctx)
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{
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kprobe_multi_check(ctx, false);
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return 0;
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}
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SEC("kretprobe.multi")
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int test_kretprobe_manual(struct pt_regs *ctx)
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{
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kprobe_multi_check(ctx, true);
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return 0;
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}
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