cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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fexit_sleep.c (589B)

      1// SPDX-License-Identifier: GPL-2.0
      2/* Copyright (c) 2021 Facebook */
      3#include "vmlinux.h"
      4#include <bpf/bpf_helpers.h>
      5#include <bpf/bpf_tracing.h>
      6#include "bpf_misc.h"
      7
      8char LICENSE[] SEC("license") = "GPL";
      9
     10int pid = 0;
     11int fentry_cnt = 0;
     12int fexit_cnt = 0;
     13
     14SEC("fentry/" SYS_PREFIX "sys_nanosleep")
     15int nanosleep_fentry(void *ctx)
     16{
     17	if (bpf_get_current_pid_tgid() >> 32 != pid)
     18		return 0;
     19
     20	fentry_cnt++;
     21	return 0;
     22}
     23
     24SEC("fexit/" SYS_PREFIX "sys_nanosleep")
     25int nanosleep_fexit(void *ctx)
     26{
     27	if (bpf_get_current_pid_tgid() >> 32 != pid)
     28		return 0;
     29
     30	fexit_cnt++;
     31	return 0;
     32}