libmwemu 0.24.0

x86 32/64bits and system internals emulator, for securely emulating malware and other stuff.
Documentation 
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use crate::*;

// PMULDQ - Multiply Packed Doubleword Integers
//
// Multiplies even-indexed signed dwords (elements 0,2) and produces quadword results.
//
// Opcode:
// 66 0F 38 28 /r      PMULDQ xmm1, xmm2/m128   - Multiply signed dwords to qwords

const ALIGNED_ADDR: u64 = 0x3000;
const ALIGNED_ADDR2: u64 = 0x3100;

#[test]
fn test_pmuldq_all_zeros() {
    let mut emu = emu64();
    let code = [0x48, 0xb8];
    let mut full_code = code.to_vec();
    full_code.extend_from_slice(&ALIGNED_ADDR.to_le_bytes());
    full_code.extend_from_slice(&[0x48, 0xbb]);
    full_code.extend_from_slice(&ALIGNED_ADDR2.to_le_bytes());
    full_code.extend_from_slice(&[
        0x66, 0x0f, 0x6f, 0x00, // MOVDQA XMM0, [RAX]
        0x66, 0x0f, 0x6f, 0x0b, // MOVDQA XMM1, [RBX]
        0x66, 0x0f, 0x38, 0x28, 0xc1, // PMULDQ XMM0, XMM1
        0xf4, // HLT
    ]);

    emu.load_code_bytes(&full_code);
    emu.maps.write_bytes_slice(ALIGNED_ADDR, &[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);
    emu.maps.write_bytes_slice(ALIGNED_ADDR2, &[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);
    emu.run(None).unwrap();
}

#[test]
fn test_pmuldq_all_ones() {
    let mut emu = emu64();
    // 1 * 1 = 1 for both quadwords
    let code = [0x48, 0xb8];
    let mut full_code = code.to_vec();
    full_code.extend_from_slice(&ALIGNED_ADDR.to_le_bytes());
    full_code.extend_from_slice(&[0x48, 0xbb]);
    full_code.extend_from_slice(&ALIGNED_ADDR2.to_le_bytes());
    full_code.extend_from_slice(&[
        0x66, 0x0f, 0x6f, 0x00,
        0x66, 0x0f, 0x6f, 0x0b,
        0x66, 0x0f, 0x38, 0x28, 0xc1,
        0xf4,
    ]);

    emu.load_code_bytes(&full_code);
    emu.maps.write_bytes_slice(ALIGNED_ADDR, &[0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);
    emu.maps.write_bytes_slice(ALIGNED_ADDR2, &[0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);
    emu.run(None).unwrap();
}

#[test]
fn test_pmuldq_positive_values() {
    let mut emu = emu64();
    // 10 * 20 = 200, 30 * 40 = 1200
    let code = [0x48, 0xb8];
    let mut full_code = code.to_vec();
    full_code.extend_from_slice(&ALIGNED_ADDR.to_le_bytes());
    full_code.extend_from_slice(&[0x48, 0xbb]);
    full_code.extend_from_slice(&ALIGNED_ADDR2.to_le_bytes());
    full_code.extend_from_slice(&[
        0x66, 0x0f, 0x6f, 0x00,
        0x66, 0x0f, 0x6f, 0x0b,
        0x66, 0x0f, 0x38, 0x28, 0xc1,
        0xf4,
    ]);

    emu.load_code_bytes(&full_code);
    emu.maps.write_bytes_slice(ALIGNED_ADDR, &[0x0A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1E, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);
    emu.maps.write_bytes_slice(ALIGNED_ADDR2, &[0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x28, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);
    emu.run(None).unwrap();
}

#[test]
fn test_pmuldq_negative_values() {
    let mut emu = emu64();
    // -1 * -1 = 1, -2 * -2 = 4
    let code = [0x48, 0xb8];
    let mut full_code = code.to_vec();
    full_code.extend_from_slice(&ALIGNED_ADDR.to_le_bytes());
    full_code.extend_from_slice(&[0x48, 0xbb]);
    full_code.extend_from_slice(&ALIGNED_ADDR2.to_le_bytes());
    full_code.extend_from_slice(&[
        0x66, 0x0f, 0x6f, 0x00,
        0x66, 0x0f, 0x6f, 0x0b,
        0x66, 0x0f, 0x38, 0x28, 0xc1,
        0xf4,
    ]);

    emu.load_code_bytes(&full_code);
    emu.maps.write_bytes_slice(ALIGNED_ADDR, &[0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0xFE, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00]);
    emu.maps.write_bytes_slice(ALIGNED_ADDR2, &[0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0xFE, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00]);
    emu.run(None).unwrap();
}

#[test]
fn test_pmuldq_mixed_sign() {
    let mut emu = emu64();
    // 5 * -2 = -10, -3 * 4 = -12
    let code = [0x48, 0xb8];
    let mut full_code = code.to_vec();
    full_code.extend_from_slice(&ALIGNED_ADDR.to_le_bytes());
    full_code.extend_from_slice(&[0x48, 0xbb]);
    full_code.extend_from_slice(&ALIGNED_ADDR2.to_le_bytes());
    full_code.extend_from_slice(&[
        0x66, 0x0f, 0x6f, 0x00,
        0x66, 0x0f, 0x6f, 0x0b,
        0x66, 0x0f, 0x38, 0x28, 0xc1,
        0xf4,
    ]);

    emu.load_code_bytes(&full_code);
    emu.maps.write_bytes_slice(ALIGNED_ADDR, &[0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFD, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00]);
    emu.maps.write_bytes_slice(ALIGNED_ADDR2, &[0xFE, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);
    emu.run(None).unwrap();
}

#[test]
fn test_pmuldq_large_positive() {
    let mut emu = emu64();
    // 0x40000000 * 0x2 = 0x80000000
    let code = [0x48, 0xb8];
    let mut full_code = code.to_vec();
    full_code.extend_from_slice(&ALIGNED_ADDR.to_le_bytes());
    full_code.extend_from_slice(&[0x48, 0xbb]);
    full_code.extend_from_slice(&ALIGNED_ADDR2.to_le_bytes());
    full_code.extend_from_slice(&[
        0x66, 0x0f, 0x6f, 0x00,
        0x66, 0x0f, 0x6f, 0x0b,
        0x66, 0x0f, 0x38, 0x28, 0xc1,
        0xf4,
    ]);

    emu.load_code_bytes(&full_code);
    emu.maps.write_bytes_slice(ALIGNED_ADDR, &[0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, 0x00]);
    emu.maps.write_bytes_slice(ALIGNED_ADDR2, &[0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);
    emu.run(None).unwrap();
}

#[test]
fn test_pmuldq_large_negative() {
    let mut emu = emu64();
    // -0x40000000 * 2 = -0x80000000
    let code = [0x48, 0xb8];
    let mut full_code = code.to_vec();
    full_code.extend_from_slice(&ALIGNED_ADDR.to_le_bytes());
    full_code.extend_from_slice(&[0x48, 0xbb]);
    full_code.extend_from_slice(&ALIGNED_ADDR2.to_le_bytes());
    full_code.extend_from_slice(&[
        0x66, 0x0f, 0x6f, 0x00,
        0x66, 0x0f, 0x6f, 0x0b,
        0x66, 0x0f, 0x38, 0x28, 0xc1,
        0xf4,
    ]);

    emu.load_code_bytes(&full_code);
    emu.maps.write_bytes_slice(ALIGNED_ADDR, &[0x00, 0x00, 0x00, 0xC0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xC0, 0x00, 0x00, 0x00, 0x00]);
    emu.maps.write_bytes_slice(ALIGNED_ADDR2, &[0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);
    emu.run(None).unwrap();
}

#[test]
fn test_pmuldq_xmm2_xmm3() {
    let mut emu = emu64();
    let code = [0x48, 0xb8];
    let mut full_code = code.to_vec();
    full_code.extend_from_slice(&ALIGNED_ADDR.to_le_bytes());
    full_code.extend_from_slice(&[0x48, 0xbb]);
    full_code.extend_from_slice(&ALIGNED_ADDR2.to_le_bytes());
    full_code.extend_from_slice(&[
        0x66, 0x0f, 0x6f, 0x10, // MOVDQA XMM2, [RAX]
        0x66, 0x0f, 0x6f, 0x1b, // MOVDQA XMM3, [RBX]
        0x66, 0x0f, 0x38, 0x28, 0xd3, // PMULDQ XMM2, XMM3
        0xf4,
    ]);

    emu.load_code_bytes(&full_code);
    emu.maps.write_bytes_slice(ALIGNED_ADDR, &[0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);
    emu.maps.write_bytes_slice(ALIGNED_ADDR2, &[0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);
    emu.run(None).unwrap();
}

#[test]
fn test_pmuldq_from_memory() {
    let mut emu = emu64();
    let code = [0x48, 0xb8];
    let mut full_code = code.to_vec();
    full_code.extend_from_slice(&ALIGNED_ADDR.to_le_bytes());
    full_code.extend_from_slice(&[0x48, 0xbb]);
    full_code.extend_from_slice(&ALIGNED_ADDR2.to_le_bytes());
    full_code.extend_from_slice(&[
        0x66, 0x0f, 0x6f, 0x00,
        0x66, 0x0f, 0x38, 0x28, 0x03, // PMULDQ XMM0, [RBX]
        0xf4,
    ]);

    emu.load_code_bytes(&full_code);
    emu.maps.write_bytes_slice(ALIGNED_ADDR, &[0x64, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xC8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);
    emu.maps.write_bytes_slice(ALIGNED_ADDR2, &[0x0A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);
    emu.run(None).unwrap();
}

#[test]
fn test_pmuldq_power_of_two() {
    let mut emu = emu64();
    let code = [0x48, 0xb8];
    let mut full_code = code.to_vec();
    full_code.extend_from_slice(&ALIGNED_ADDR.to_le_bytes());
    full_code.extend_from_slice(&[0x48, 0xbb]);
    full_code.extend_from_slice(&ALIGNED_ADDR2.to_le_bytes());
    full_code.extend_from_slice(&[
        0x66, 0x0f, 0x6f, 0x00,
        0x66, 0x0f, 0x6f, 0x0b,
        0x66, 0x0f, 0x38, 0x28, 0xc1,
        0xf4,
    ]);

    emu.load_code_bytes(&full_code);
    emu.maps.write_bytes_slice(ALIGNED_ADDR, &[0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00]);
    emu.maps.write_bytes_slice(ALIGNED_ADDR2, &[0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00]);
    emu.run(None).unwrap();
}

#[test]
fn test_pmuldq_xmm8_xmm9() {
    let mut emu = emu64();
    let code = [0x48, 0xb8];
    let mut full_code = code.to_vec();
    full_code.extend_from_slice(&ALIGNED_ADDR.to_le_bytes());
    full_code.extend_from_slice(&[0x48, 0xbb]);
    full_code.extend_from_slice(&ALIGNED_ADDR2.to_le_bytes());
    full_code.extend_from_slice(&[
        0x66, 0x44, 0x0f, 0x6f, 0x00, // MOVDQA XMM8, [RAX]
        0x66, 0x44, 0x0f, 0x6f, 0x0b, // MOVDQA XMM9, [RBX]
        0x66, 0x45, 0x0f, 0x38, 0x28, 0xc1, // PMULDQ XMM8, XMM9
        0xf4,
    ]);

    emu.load_code_bytes(&full_code);
    emu.maps.write_bytes_slice(ALIGNED_ADDR, &[0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);
    emu.maps.write_bytes_slice(ALIGNED_ADDR2, &[0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);
    emu.run(None).unwrap();
}

#[test]
fn test_pmuldq_same_register() {
    let mut emu = emu64();
    let code = [0x48, 0xb8];
    let mut full_code = code.to_vec();
    full_code.extend_from_slice(&ALIGNED_ADDR.to_le_bytes());
    full_code.extend_from_slice(&[
        0x66, 0x0f, 0x6f, 0x00, // MOVDQA XMM0, [RAX]
        0x66, 0x0f, 0x38, 0x28, 0xc0, // PMULDQ XMM0, XMM0
        0xf4,
    ]);

    emu.load_code_bytes(&full_code);
    emu.maps.write_bytes_slice(ALIGNED_ADDR, &[0x0A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);
    emu.run(None).unwrap();
}

#[test]
fn test_pmuldq_sequence() {
    let mut emu = emu64();
    let code = [0x48, 0xb8];
    let mut full_code = code.to_vec();
    full_code.extend_from_slice(&ALIGNED_ADDR.to_le_bytes());
    full_code.extend_from_slice(&[
        0x66, 0x0f, 0x6f, 0x00, // MOVDQA XMM0, [RAX]
        0x66, 0x0f, 0x6f, 0x08, // MOVDQA XMM1, [RAX]
        0x66, 0x0f, 0x38, 0x28, 0xc1, // PMULDQ XMM0, XMM1
        0x66, 0x0f, 0x38, 0x28, 0xc1, // PMULDQ XMM0, XMM1 again
        0xf4,
    ]);

    emu.load_code_bytes(&full_code);
    emu.maps.write_bytes_slice(ALIGNED_ADDR, &[0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);
    emu.run(None).unwrap();
}

#[test]
fn test_pmuldq_odd_elements_ignored() {
    let mut emu = emu64();
    let code = [0x48, 0xb8];
    let mut full_code = code.to_vec();
    full_code.extend_from_slice(&ALIGNED_ADDR.to_le_bytes());
    full_code.extend_from_slice(&[0x48, 0xbb]);
    full_code.extend_from_slice(&ALIGNED_ADDR2.to_le_bytes());
    full_code.extend_from_slice(&[
        0x66, 0x0f, 0x6f, 0x00,
        0x66, 0x0f, 0x6f, 0x0b,
        0x66, 0x0f, 0x38, 0x28, 0xc1,
        0xf4,
    ]);

    emu.load_code_bytes(&full_code);
    emu.maps.write_bytes_slice(ALIGNED_ADDR, &[0x02, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0x03, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF]);
    emu.maps.write_bytes_slice(ALIGNED_ADDR2, &[0x05, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0x07, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF]);
    emu.run(None).unwrap();
}

#[test]
fn test_pmuldq_zero_times_negative() {
    let mut emu = emu64();
    // 0 * -1 = 0
    let code = [0x48, 0xb8];
    let mut full_code = code.to_vec();
    full_code.extend_from_slice(&ALIGNED_ADDR.to_le_bytes());
    full_code.extend_from_slice(&[0x48, 0xbb]);
    full_code.extend_from_slice(&ALIGNED_ADDR2.to_le_bytes());
    full_code.extend_from_slice(&[
        0x66, 0x0f, 0x6f, 0x00,
        0x66, 0x0f, 0x6f, 0x0b,
        0x66, 0x0f, 0x38, 0x28, 0xc1,
        0xf4,
    ]);

    emu.load_code_bytes(&full_code);
    emu.maps.write_bytes_slice(ALIGNED_ADDR, &[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);
    emu.maps.write_bytes_slice(ALIGNED_ADDR2, &[0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00]);
    emu.run(None).unwrap();
}

#[test]
fn test_pmuldq_alternating_signs() {
    let mut emu = emu64();
    let code = [0x48, 0xb8];
    let mut full_code = code.to_vec();
    full_code.extend_from_slice(&ALIGNED_ADDR.to_le_bytes());
    full_code.extend_from_slice(&[0x48, 0xbb]);
    full_code.extend_from_slice(&ALIGNED_ADDR2.to_le_bytes());
    full_code.extend_from_slice(&[
        0x66, 0x0f, 0x6f, 0x00,
        0x66, 0x0f, 0x6f, 0x0b,
        0x66, 0x0f, 0x38, 0x28, 0xc1,
        0xf4,
    ]);

    emu.load_code_bytes(&full_code);
    emu.maps.write_bytes_slice(ALIGNED_ADDR, &[0x0A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xF6, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00]);
    emu.maps.write_bytes_slice(ALIGNED_ADDR2, &[0xF6, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x0A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);
    emu.run(None).unwrap();
}