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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sockex1_kern.c (661B)

      1#include <uapi/linux/bpf.h>
      2#include <uapi/linux/if_ether.h>
      3#include <uapi/linux/if_packet.h>
      4#include <uapi/linux/ip.h>
      5#include <bpf/bpf_helpers.h>
      6#include "bpf_legacy.h"
      7
      8struct {
      9	__uint(type, BPF_MAP_TYPE_ARRAY);
     10	__type(key, u32);
     11	__type(value, long);
     12	__uint(max_entries, 256);
     13} my_map SEC(".maps");
     14
     15SEC("socket1")
     16int bpf_prog1(struct __sk_buff *skb)
     17{
     18	int index = load_byte(skb, ETH_HLEN + offsetof(struct iphdr, protocol));
     19	long *value;
     20
     21	if (skb->pkt_type != PACKET_OUTGOING)
     22		return 0;
     23
     24	value = bpf_map_lookup_elem(&my_map, &index);
     25	if (value)
     26		__sync_fetch_and_add(value, skb->len);
     27
     28	return 0;
     29}
     30char _license[] SEC("license") = "GPL";