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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loop1.c (557B)

      1// SPDX-License-Identifier: GPL-2.0
      2// Copyright (c) 2019 Facebook
      3#include <linux/sched.h>
      4#include <linux/ptrace.h>
      5#include <stdint.h>
      6#include <stddef.h>
      7#include <stdbool.h>
      8#include <linux/bpf.h>
      9#include <bpf/bpf_helpers.h>
     10#include <bpf/bpf_tracing.h>
     11
     12char _license[] SEC("license") = "GPL";
     13
     14SEC("raw_tracepoint/kfree_skb")
     15int nested_loops(volatile struct pt_regs* ctx)
     16{
     17	int i, j, sum = 0, m;
     18
     19	for (j = 0; j < 300; j++)
     20		for (i = 0; i < j; i++) {
     21			if (j & 1)
     22				m = PT_REGS_RC(ctx);
     23			else
     24				m = j;
     25			sum += i * m;
     26		}
     27
     28	return sum;
     29}