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_btf_haskv.c (965B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/* Copyright (c) 2018 Facebook */
      3#include <linux/bpf.h>
      4#include <bpf/bpf_helpers.h>
      5#include "bpf_legacy.h"
      6
      7struct ipv_counts {
      8	unsigned int v4;
      9	unsigned int v6;
     10};
     11
     12#pragma GCC diagnostic push
     13#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
     14struct bpf_map_def SEC("maps") btf_map = {
     15	.type = BPF_MAP_TYPE_ARRAY,
     16	.key_size = sizeof(int),
     17	.value_size = sizeof(struct ipv_counts),
     18	.max_entries = 4,
     19};
     20#pragma GCC diagnostic pop
     21
     22BPF_ANNOTATE_KV_PAIR(btf_map, int, struct ipv_counts);
     23
     24__attribute__((noinline))
     25int test_long_fname_2(void)
     26{
     27	struct ipv_counts *counts;
     28	int key = 0;
     29
     30	counts = bpf_map_lookup_elem(&btf_map, &key);
     31	if (!counts)
     32		return 0;
     33
     34	counts->v6++;
     35
     36	return 0;
     37}
     38
     39__attribute__((noinline))
     40int test_long_fname_1(void)
     41{
     42	return test_long_fname_2();
     43}
     44
     45SEC("dummy_tracepoint")
     46int _dummy_tracepoint(void *arg)
     47{
     48	return test_long_fname_1();
     49}
     50
     51char _license[] SEC("license") = "GPL";