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_func10.c (441B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2#include <stddef.h>
      3#include <linux/bpf.h>
      4#include <bpf/bpf_helpers.h>
      5
      6struct Small {
      7	int x;
      8};
      9
     10struct Big {
     11	int x;
     12	int y;
     13};
     14
     15__noinline int foo(const struct Big *big)
     16{
     17	if (!big)
     18		return 0;
     19
     20	return bpf_get_prandom_u32() < big->y;
     21}
     22
     23SEC("cgroup_skb/ingress")
     24int test_cls(struct __sk_buff *skb)
     25{
     26	const struct Small small = {.x = skb->len };
     27
     28	return foo((struct Big *)&small) ? 1 : 0;
     29}