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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bpf_iter_bpf_array_map.c (774B)

      1// SPDX-License-Identifier: GPL-2.0
      2/* Copyright (c) 2020 Facebook */
      3#include "bpf_iter.h"
      4#include <bpf/bpf_helpers.h>
      5#include <bpf/bpf_tracing.h>
      6
      7char _license[] SEC("license") = "GPL";
      8
      9struct key_t {
     10	int a;
     11	int b;
     12	int c;
     13};
     14
     15struct {
     16	__uint(type, BPF_MAP_TYPE_ARRAY);
     17	__uint(max_entries, 3);
     18	__type(key, __u32);
     19	__type(value, __u64);
     20} arraymap1 SEC(".maps");
     21
     22__u32 key_sum = 0;
     23__u64 val_sum = 0;
     24
     25SEC("iter/bpf_map_elem")
     26int dump_bpf_array_map(struct bpf_iter__bpf_map_elem *ctx)
     27{
     28	__u32 *key = ctx->key;
     29	__u64 *val = ctx->value;
     30
     31	if (key == (void *)0 || val == (void *)0)
     32		return 0;
     33
     34	bpf_seq_write(ctx->meta->seq, key, sizeof(__u32));
     35	bpf_seq_write(ctx->meta->seq, val, sizeof(__u64));
     36	key_sum += *key;
     37	val_sum += *val;
     38	*val = *key;
     39	return 0;
     40}