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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kfunc_call_test_subprog.c (948B)

      1// SPDX-License-Identifier: GPL-2.0
      2/* Copyright (c) 2021 Facebook */
      3#include <linux/bpf.h>
      4#include <bpf/bpf_helpers.h>
      5#include "bpf_tcp_helpers.h"
      6
      7extern const int bpf_prog_active __ksym;
      8extern __u64 bpf_kfunc_call_test1(struct sock *sk, __u32 a, __u64 b,
      9				  __u32 c, __u64 d) __ksym;
     10extern struct sock *bpf_kfunc_call_test3(struct sock *sk) __ksym;
     11int active_res = -1;
     12int sk_state_res = -1;
     13
     14int __noinline f1(struct __sk_buff *skb)
     15{
     16	struct bpf_sock *sk = skb->sk;
     17	int *active;
     18
     19	if (!sk)
     20		return -1;
     21
     22	sk = bpf_sk_fullsock(sk);
     23	if (!sk)
     24		return -1;
     25
     26	active = (int *)bpf_per_cpu_ptr(&bpf_prog_active,
     27					bpf_get_smp_processor_id());
     28	if (active)
     29		active_res = *active;
     30
     31	sk_state_res = bpf_kfunc_call_test3((struct sock *)sk)->sk_state;
     32
     33	return (__u32)bpf_kfunc_call_test1((struct sock *)sk, 1, 2, 3, 4);
     34}
     35
     36SEC("tc")
     37int kfunc_call_test1(struct __sk_buff *skb)
     38{
     39	return f1(skb);
     40}
     41
     42char _license[] SEC("license") = "GPL";