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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trace_dummy_st_ops.c (476B)

      1// SPDX-License-Identifier: GPL-2.0
      2#include <linux/bpf.h>
      3#include <bpf/bpf_helpers.h>
      4#include <bpf/bpf_tracing.h>
      5
      6int val = 0;
      7
      8SEC("fentry/test_1")
      9int BPF_PROG(fentry_test_1, __u64 *st_ops_ctx)
     10{
     11	__u64 state;
     12
     13	/* Read the traced st_ops arg1 which is a pointer */
     14	bpf_probe_read_kernel(&state, sizeof(__u64), (void *)st_ops_ctx);
     15	/* Read state->val */
     16	bpf_probe_read_kernel(&val, sizeof(__u32), (void *)state);
     17
     18	return 0;
     19}
     20
     21char _license[] SEC("license") = "GPL";