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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trace_printk.c (497B)

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