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

spintest_kern.c (2166B)


      1/* Copyright (c) 2016, Facebook
      2 *
      3 * This program is free software; you can redistribute it and/or
      4 * modify it under the terms of version 2 of the GNU General Public
      5 * License as published by the Free Software Foundation.
      6 */
      7#include <linux/skbuff.h>
      8#include <linux/netdevice.h>
      9#include <linux/version.h>
     10#include <uapi/linux/bpf.h>
     11#include <uapi/linux/perf_event.h>
     12#include <bpf/bpf_helpers.h>
     13#include <bpf/bpf_tracing.h>
     14
     15struct {
     16	__uint(type, BPF_MAP_TYPE_HASH);
     17	__type(key, long);
     18	__type(value, long);
     19	__uint(max_entries, 1024);
     20} my_map SEC(".maps");
     21struct {
     22	__uint(type, BPF_MAP_TYPE_PERCPU_HASH);
     23	__uint(key_size, sizeof(long));
     24	__uint(value_size, sizeof(long));
     25	__uint(max_entries, 1024);
     26} my_map2 SEC(".maps");
     27
     28struct {
     29	__uint(type, BPF_MAP_TYPE_STACK_TRACE);
     30	__uint(key_size, sizeof(u32));
     31	__uint(value_size, PERF_MAX_STACK_DEPTH * sizeof(u64));
     32	__uint(max_entries, 10000);
     33} stackmap SEC(".maps");
     34
     35#define PROG(foo) \
     36int foo(struct pt_regs *ctx) \
     37{ \
     38	long v = PT_REGS_IP(ctx), *val; \
     39\
     40	val = bpf_map_lookup_elem(&my_map, &v); \
     41	bpf_map_update_elem(&my_map, &v, &v, BPF_ANY); \
     42	bpf_map_update_elem(&my_map2, &v, &v, BPF_ANY); \
     43	bpf_map_delete_elem(&my_map2, &v); \
     44	bpf_get_stackid(ctx, &stackmap, BPF_F_REUSE_STACKID); \
     45	return 0; \
     46}
     47
     48/* add kprobes to all possible *spin* functions */
     49SEC("kprobe/spin_unlock")PROG(p1)
     50SEC("kprobe/spin_lock")PROG(p2)
     51SEC("kprobe/mutex_spin_on_owner")PROG(p3)
     52SEC("kprobe/rwsem_spin_on_owner")PROG(p4)
     53SEC("kprobe/spin_unlock_irqrestore")PROG(p5)
     54SEC("kprobe/_raw_spin_unlock_irqrestore")PROG(p6)
     55SEC("kprobe/_raw_spin_unlock_bh")PROG(p7)
     56SEC("kprobe/_raw_spin_unlock")PROG(p8)
     57SEC("kprobe/_raw_spin_lock_irqsave")PROG(p9)
     58SEC("kprobe/_raw_spin_trylock_bh")PROG(p10)
     59SEC("kprobe/_raw_spin_lock_irq")PROG(p11)
     60SEC("kprobe/_raw_spin_trylock")PROG(p12)
     61SEC("kprobe/_raw_spin_lock")PROG(p13)
     62SEC("kprobe/_raw_spin_lock_bh")PROG(p14)
     63/* and to inner bpf helpers */
     64SEC("kprobe/htab_map_update_elem")PROG(p15)
     65SEC("kprobe/__htab_percpu_map_update_elem")PROG(p16)
     66SEC("kprobe/htab_map_alloc")PROG(p17)
     67
     68char _license[] SEC("license") = "GPL";
     69u32 _version SEC("version") = LINUX_VERSION_CODE;