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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2020 Facebook */
#include "vmlinux.h"
#include <asm/unistd.h>
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
#include <bpf/bpf_core_read.h>
#define MY_TV_NSEC 1337
bool tp_called = false;
bool raw_tp_called = false;
bool tp_btf_called = false;
bool kprobe_called = false;
bool fentry_called = false;
SEC("tp/syscalls/sys_enter_nanosleep")
int handle__tp(struct trace_event_raw_sys_enter *args)
{
struct __kernel_timespec *ts;
long tv_nsec;
if (args->id != __NR_nanosleep)
return 0;
ts = (void *)args->args[0];
if (bpf_probe_read_user(&tv_nsec, sizeof(ts->tv_nsec), &ts->tv_nsec) ||
tv_nsec != MY_TV_NSEC)
return 0;
tp_called = true;
return 0;
}
SEC("raw_tp/sys_enter")
int BPF_PROG(handle__raw_tp, struct pt_regs *regs, long id)
{
struct __kernel_timespec *ts;
long tv_nsec;
if (id != __NR_nanosleep)
return 0;
ts = (void *)PT_REGS_PARM1_CORE(regs);
if (bpf_probe_read_user(&tv_nsec, sizeof(ts->tv_nsec), &ts->tv_nsec) ||
tv_nsec != MY_TV_NSEC)
return 0;
raw_tp_called = true;
return 0;
}
SEC("tp_btf/sys_enter")
int BPF_PROG(handle__tp_btf, struct pt_regs *regs, long id)
{
struct __kernel_timespec *ts;
long tv_nsec;
if (id != __NR_nanosleep)
return 0;
ts = (void *)PT_REGS_PARM1_CORE(regs);
if (bpf_probe_read_user(&tv_nsec, sizeof(ts->tv_nsec), &ts->tv_nsec) ||
tv_nsec != MY_TV_NSEC)
return 0;
tp_btf_called = true;
return 0;
}
SEC("kprobe/hrtimer_nanosleep")
int BPF_KPROBE(handle__kprobe,
ktime_t rqtp, enum hrtimer_mode mode, clockid_t clockid)
{
if (rqtp == MY_TV_NSEC)
kprobe_called = true;
return 0;
}
SEC("fentry/hrtimer_nanosleep")
int BPF_PROG(handle__fentry,
ktime_t rqtp, enum hrtimer_mode mode, clockid_t clockid)
{
if (rqtp == MY_TV_NSEC)
fentry_called = true;
return 0;
}
char _license[] SEC("license") = "GPL";
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