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_send_signal_kern.c (875B)

      1// SPDX-License-Identifier: GPL-2.0
      2// Copyright (c) 2019 Facebook
      3#include <linux/bpf.h>
      4#include <linux/version.h>
      5#include <bpf/bpf_helpers.h>
      6
      7__u32 sig = 0, pid = 0, status = 0, signal_thread = 0;
      8
      9static __always_inline int bpf_send_signal_test(void *ctx)
     10{
     11	int ret;
     12
     13	if (status != 0 || pid == 0)
     14		return 0;
     15
     16	if ((bpf_get_current_pid_tgid() >> 32) == pid) {
     17		if (signal_thread)
     18			ret = bpf_send_signal_thread(sig);
     19		else
     20			ret = bpf_send_signal(sig);
     21		if (ret == 0)
     22			status = 1;
     23	}
     24
     25	return 0;
     26}
     27
     28SEC("tracepoint/syscalls/sys_enter_nanosleep")
     29int send_signal_tp(void *ctx)
     30{
     31	return bpf_send_signal_test(ctx);
     32}
     33
     34SEC("tracepoint/sched/sched_switch")
     35int send_signal_tp_sched(void *ctx)
     36{
     37	return bpf_send_signal_test(ctx);
     38}
     39
     40SEC("perf_event")
     41int send_signal_perf(void *ctx)
     42{
     43	return bpf_send_signal_test(ctx);
     44}
     45
     46char __license[] SEC("license") = "GPL";