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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test_global_func5.c (589B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/* Copyright (c) 2020 Facebook */
      3#include <stddef.h>
      4#include <linux/bpf.h>
      5#include <bpf/bpf_helpers.h>
      6
      7__attribute__ ((noinline))
      8int f1(struct __sk_buff *skb)
      9{
     10	return skb->len;
     11}
     12
     13int f3(int, struct __sk_buff *skb);
     14
     15__attribute__ ((noinline))
     16int f2(int val, struct __sk_buff *skb)
     17{
     18	return f1(skb) + f3(val, (void *)&val); /* type mismatch */
     19}
     20
     21__attribute__ ((noinline))
     22int f3(int val, struct __sk_buff *skb)
     23{
     24	return skb->ifindex * val;
     25}
     26
     27SEC("tc")
     28int test_cls(struct __sk_buff *skb)
     29{
     30	return f1(skb) + f2(2, skb) + f3(3, skb);
     31}