| 1 | // SPDX-License-Identifier: GPL-2.0 |
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| 2 | // Copyright (c) 2020, Oracle and/or its affiliates. |
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| 3 | |
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| 4 | #include "vmlinux.h" |
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| 5 | #include <bpf/bpf_helpers.h> |
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| 6 | #include <bpf/bpf_tracing.h> |
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| 7 | #include "bpf_misc.h" |
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| 8 | |
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| 9 | char _license[] SEC("license" ) = "GPL" ; |
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| 10 | |
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| 11 | int trace_printk_ret = 0; |
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| 12 | int trace_printk_ran = 0; |
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| 13 | |
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| 14 | const char fmt[] = "Testing,testing %d\n" ; |
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| 15 | |
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| 16 | SEC("fentry/" SYS_PREFIX "sys_nanosleep" ) |
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| 17 | int sys_enter(void *ctx) |
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| 18 | { |
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| 19 | trace_printk_ret = bpf_trace_printk(fmt, sizeof(fmt), |
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| 20 | ++trace_printk_ran); |
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| 21 | return 0; |
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| 22 | } |
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| 23 | |
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