cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

test_urandom_usdt.c (1928B)

      1// SPDX-License-Identifier: GPL-2.0
      2/* Copyright (c) 2022 Meta Platforms, Inc. and affiliates. */
      3
      4#include "vmlinux.h"
      5#include <bpf/bpf_helpers.h>
      6#include <bpf/usdt.bpf.h>
      7
      8int urand_pid;
      9
     10int urand_read_without_sema_call_cnt;
     11int urand_read_without_sema_buf_sz_sum;
     12
     13SEC("usdt/./urandom_read:urand:read_without_sema")
     14int BPF_USDT(urand_read_without_sema, int iter_num, int iter_cnt, int buf_sz)
     15{
     16	if (urand_pid != (bpf_get_current_pid_tgid() >> 32))
     17		return 0;
     18
     19	__sync_fetch_and_add(&urand_read_without_sema_call_cnt, 1);
     20	__sync_fetch_and_add(&urand_read_without_sema_buf_sz_sum, buf_sz);
     21
     22	return 0;
     23}
     24
     25int urand_read_with_sema_call_cnt;
     26int urand_read_with_sema_buf_sz_sum;
     27
     28SEC("usdt/./urandom_read:urand:read_with_sema")
     29int BPF_USDT(urand_read_with_sema, int iter_num, int iter_cnt, int buf_sz)
     30{
     31	if (urand_pid != (bpf_get_current_pid_tgid() >> 32))
     32		return 0;
     33
     34	__sync_fetch_and_add(&urand_read_with_sema_call_cnt, 1);
     35	__sync_fetch_and_add(&urand_read_with_sema_buf_sz_sum, buf_sz);
     36
     37	return 0;
     38}
     39
     40int urandlib_read_without_sema_call_cnt;
     41int urandlib_read_without_sema_buf_sz_sum;
     42
     43SEC("usdt/./liburandom_read.so:urandlib:read_without_sema")
     44int BPF_USDT(urandlib_read_without_sema, int iter_num, int iter_cnt, int buf_sz)
     45{
     46	if (urand_pid != (bpf_get_current_pid_tgid() >> 32))
     47		return 0;
     48
     49	__sync_fetch_and_add(&urandlib_read_without_sema_call_cnt, 1);
     50	__sync_fetch_and_add(&urandlib_read_without_sema_buf_sz_sum, buf_sz);
     51
     52	return 0;
     53}
     54
     55int urandlib_read_with_sema_call_cnt;
     56int urandlib_read_with_sema_buf_sz_sum;
     57
     58SEC("usdt/./liburandom_read.so:urandlib:read_with_sema")
     59int BPF_USDT(urandlib_read_with_sema, int iter_num, int iter_cnt, int buf_sz)
     60{
     61	if (urand_pid != (bpf_get_current_pid_tgid() >> 32))
     62		return 0;
     63
     64	__sync_fetch_and_add(&urandlib_read_with_sema_call_cnt, 1);
     65	__sync_fetch_and_add(&urandlib_read_with_sema_buf_sz_sum, buf_sz);
     66
     67	return 0;
     68}
     69
     70char _license[] SEC("license") = "GPL";