liblisa 0.3.0

A tool for automated discovery and analysis of the ISA of a CPU.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164

use std::time::Duration;

use criterion::{Criterion, black_box, criterion_group, criterion_main};
use liblisa::arch::CpuState;
use liblisa::arch::x64::{GpReg, X64Arch, X64Reg, XmmReg};
use liblisa::encoding::dataflows::MemoryAccesses;
use liblisa::instr::Instruction;
use liblisa::oracle::MappableArea;
use liblisa::state::random::StateGen;
use liblisa::state::{Addr, MemoryState, Permissions, StateByte, SystemState, SystemStateByteView};
use liblisa::value::MutValue;
use rand::SeedableRng;
use rand_xoshiro::Xoshiro256PlusPlus;

#[derive(Copy, Clone, Debug)]
struct Everything;

impl MappableArea for Everything {
    fn can_map(&self, _: Addr) -> bool {
        true
    }
}

pub fn find_differences1(c: &mut Criterion) {
    let empty1 = SystemState::<X64Arch>::default();
    let empty2 = SystemState::<X64Arch>::default();

    let accesses = MemoryAccesses::<X64Arch> {
        instr: Instruction::new(&[0x01]),
        memory: Vec::new(),
        use_trap_flag: true,
    };

    let view = SystemStateByteView::new(&accesses);

    let mut rng = Xoshiro256PlusPlus::seed_from_u64(0);
    let g = StateGen::new(&accesses, &Everything).unwrap();
    let random1 = g.randomize_new(&mut rng).unwrap();
    let random2 = g.randomize_new(&mut rng).unwrap();

    c.bench_function("find_differences_empty_empty", |b| {
        b.iter(|| {
            view.find_differences(&empty1, &empty2, &mut |byte| {
                black_box(byte);
            })
        })
    });

    c.bench_function("find_differences_random_random", |b| {
        b.iter(|| {
            view.find_differences(&random1, &random2, &mut |byte| {
                black_box(byte);
            })
        })
    });
}

fn find_differences2(c: &mut Criterion) {
    let state = SystemState::<X64Arch>::new(
        Default::default(),
        MemoryState::from_vec(vec![(
            Addr::new(0x0),
            Permissions::Execute,
            vec![0x00, 0xf0, 0x20, 0x50, 0x99, 0xab],
        )]),
    );

    let mut state2 = SystemState::<X64Arch>::new(
        Default::default(),
        MemoryState::from_vec(vec![(
            Addr::new(0x0),
            Permissions::Execute,
            vec![0x00, 0xf0, 0x20, 0x50, 0x99, 0xab],
        )]),
    );

    CpuState::<X64Arch>::set_gpreg(&mut *state2.cpu_mut(), GpReg::Rip, 50);

    let accesses = MemoryAccesses::<X64Arch> {
        instr: Instruction::new(&[0x01]),
        memory: Vec::new(),
        use_trap_flag: true,
    };
    let view = SystemStateByteView::new(&accesses);

    c.bench_function("find_differences-1", |b| {
        b.iter(|| {
            view.find_differences(&state, &state2, &mut |v| {
                black_box(v);
            });
        })
    });

    CpuState::<X64Arch>::set_gpreg(&mut *state2.cpu_mut(), GpReg::Rip, 0xffff_ffff_ffff_ffff);
    c.bench_function("find_differences-8", |b| {
        b.iter(|| {
            view.find_differences(&state, &state2, &mut |v| {
                black_box(v);
            });
        })
    });

    CpuState::<X64Arch>::set_gpreg(&mut *state2.cpu_mut(), GpReg::Rip, 0xffff_ffff_ffff_ffff);
    CpuState::<X64Arch>::modify_reg(&mut *state2.cpu_mut(), X64Reg::Xmm(XmmReg::Reg(1)), |v| match v {
        MutValue::Bytes(b) => b.fill(0xff),
        _ => todo!(),
    });

    c.bench_function("find_differences-40", |b| {
        b.iter(|| {
            view.find_differences(&state, &state2, &mut |v| {
                black_box(v);
            });
        })
    });

    CpuState::<X64Arch>::set_gpreg(&mut *state2.cpu_mut(), GpReg::Rip, 0xffff_ffff_ffff_ffff);
    CpuState::<X64Arch>::modify_reg(&mut *state2.cpu_mut(), X64Reg::Xmm(XmmReg::Reg(2)), |v| match v {
        MutValue::Bytes(b) => b.fill(0xff),
        _ => todo!(),
    });
    CpuState::<X64Arch>::modify_reg(&mut *state2.cpu_mut(), X64Reg::Xmm(XmmReg::Reg(5)), |v| match v {
        MutValue::Bytes(b) => b.fill(0xff),
        _ => todo!(),
    });
    CpuState::<X64Arch>::modify_reg(&mut *state2.cpu_mut(), X64Reg::Xmm(XmmReg::Reg(8)), |v| match v {
        MutValue::Bytes(b) => b.fill(0xff),
        _ => todo!(),
    });

    c.bench_function("find_differences-136", |b| {
        b.iter(|| {
            view.find_differences(&state, &state2, &mut |v| {
                black_box(v);
            });
        })
    });

    let dest_diff_mask = Default::default();
    let diff_mask = SystemStateByteView::<X64Arch>::create_diff_mask(
        &view,
        (0..SystemStateByteView::<X64Arch>::size(&view)).map(StateByte::new),
    );
    c.bench_function("find_differences_with_mask-0-136", |b| {
        b.iter(|| {
            view.find_dataflows_masked(
                (&state, &state2).into(),
                (&state, &state2).into(),
                &dest_diff_mask,
                &diff_mask,
                &mut |v| {
                    black_box(v);
                },
            );
        })
    });
}

criterion_group! {
    name = benches;
    config = Criterion::default().measurement_time(Duration::from_secs(15));
    targets = find_differences2, find_differences1
}
criterion_main!(benches);