// test_i386_loop
public static void TestLoop()
{
var addr = 0x1000000UL;
var code = new byte[]
{
0x41, // INC ecx
0x4A, // DEC edx
0xEB, // JMP self-loop
0xFE
};
Console.WriteLine("===================================");
Console.WriteLine("Emulate i386 code that emulates forever.");
using (var emulator = new x86Emulator(x86Mode.b32))
{
// Map 2MB of memory.
emulator.Memory.Map(addr, 2 * 1024 * 1024, MemoryPermissions.All);
// Write machine code to be emulated.
emulator.Memory.Write(addr, code, code.Length);
// Initialize registers.
emulator.Registers.ECX = 0x1234;
emulator.Registers.EDX = 0x7890;
// Emulate code for 2 seconds, so we can exit the code since it loops forever.
emulator.Start(addr, addr + (ulong)code.Length, TimeSpan.FromSeconds(2), 0);
Console.WriteLine(">>> Emulation done. Below is the CPU context");
Console.WriteLine($">>> ECX = 0x{emulator.Registers.ECX.ToString("x2")}");
Console.WriteLine($">>> EDX = 0x{emulator.Registers.EDX.ToString("x2")}");
}
}
// test_i386_invalid_mem_write
public static void TestInvalidMemoryWrite()
{
var addr = 0x1000000UL;
var code = new byte[]
{
0x89, 0x0D, 0xAA, 0xAA, 0xAA, 0xAA, // MOV [0xaaaaaaaa] ecx
0x41, // INC ecx
0x4A // DEC edx
};
Console.WriteLine("===================================");
Console.WriteLine("Emulate i386 code that write to invalid memory.");
using (var emulator = new x86Emulator(x86Mode.b32))
{
// Map 2MB of memory.
emulator.Memory.Map(addr, 2 * 1024 * 1024, MemoryPermissions.All);
// Write machine code to be emulated.
emulator.Memory.Write(addr, code, code.Length);
// Initialize registers.
emulator.Registers.ECX = 0x1234;
emulator.Registers.EDX = 0x7890;
emulator.Hooks.Code.Add(CodeHook, null);
emulator.Hooks.Memory.Add(MemoryEventHookType.UnmappedRead | MemoryEventHookType.UnmappedWrite, InvalidMemoryHook, null);
// Start emulating the machine written machine code.
emulator.Start(addr, addr + (ulong)code.Length);
Console.WriteLine(">>> Emulation done. Below is the CPU context");
Console.WriteLine($">>> ECX = 0x{emulator.Registers.ECX.ToString("x2")}");
Console.WriteLine($">>> EDX = 0x{emulator.Registers.EDX.ToString("x2")}");
// Read from memory.
var buffer = new byte[4];
var tmp = 0;
emulator.Memory.Read(0xAAAAAAAA, buffer, buffer.Length);
tmp = BitConverter.ToInt32(buffer, 0);
Console.WriteLine($">>> Read 4 bytes from [0x{0xAAAAAAAA.ToString("x2")}] = 0x{tmp.ToString("x2")}");
try
{
emulator.Memory.Read(0xFFFFFFAA, buffer, buffer.Length);
tmp = BitConverter.ToInt32(buffer, 0);
Console.WriteLine($">>> Read 4 bytes from [0x{0xFFFFFFAA.ToString("x2")}] = 0x{tmp.ToString("x2")}");
}
catch
{
Console.WriteLine($">>> Failed to read 4 bytes from [0x{0xFFFFFFAA.ToString("x2")}]");
}
}
}
public static void Main(string[] args)
{
Console.WriteLine("Unicorn version - " + Version.Current);
using (var emulator = new x86Emulator(x86Mode.b32))
{
ulong addr = 0x1000000;
byte[] x86code =
{
0x41, // INC ECX
0x4a // DEC EDX
};
var ecx = 0x1234;
var edx = 0x7890;
// Map 2mb of memory.
emulator.Memory.Map(addr, 2 * 1024 * 1024, MemoryPermissions.All);
var handle = emulator.Hooks.Code.Add(CodeHook, null);
// Capture context.
Console.WriteLine("-> Capturing context...");
using (var context = emulator.Context)
{
emulator.Registers.ECX = ecx;
emulator.Registers.EDX = edx;
emulator.Memory.Write(addr, x86code, x86code.Length);
emulator.Start(addr, addr + (ulong)x86code.Length);
Console.WriteLine($"ECX = {emulator.Registers.ECX}");
Console.WriteLine($"EDX = {emulator.Registers.EDX}");
Console.WriteLine("-> Restoring context...");
// Restore captured context.
emulator.Context = context;
}
Console.WriteLine($"ECX = {emulator.Registers.ECX}");
Console.WriteLine($"EDX = {emulator.Registers.EDX}");
}
Console.ReadLine();
}
// test_i386_context_save
public static void TestContextSave()
{
var addr = 0x1000000UL;
var code = new byte[]
{
0x40, // INC eax
};
Console.WriteLine("===================================");
Console.WriteLine("Save/restore CPU context in opaque blob.");
using (var emulator = new x86Emulator(x86Mode.b32))
{
// Map 8KB of memory for emulation.
emulator.Memory.Map(addr, 8 * 1024, MemoryPermissions.All);
// Write machine code to emulate.
emulator.Memory.Write(addr, code, code.Length);
// Initialize registers.
emulator.Registers.EAX = 1;
// Emulate written machine code.
emulator.Start(addr, addr + (ulong)code.Length);
Console.WriteLine(">>> Emulation done. Below is the CPU context");
Console.WriteLine($">>> EAX = 0x{emulator.Registers.EAX.ToString("x2")}");
Console.WriteLine(">>> Saving CPU context");
using (var context = emulator.Context)
{
Console.WriteLine(">>> Running emulation for the second time");
// Emulate machine code again.
emulator.Start(addr, addr + (ulong)code.Length);
Console.WriteLine(">>> Emulation done. Below is the CPU context");
Console.WriteLine($">>> EAX = 0x{emulator.Registers.EAX.ToString("x2")}");
emulator.Context = context;
}
Console.WriteLine(">>> CPU context restored. Below is the CPU context");
Console.WriteLine($">>> EAX = 0x{emulator.Registers.EAX.ToString("x2")}");
}
}
// test_i386_invalid_mem_read
public static void TestInvalidMemoryRead()
{
var addr = 0x1000000UL;
var code = new byte[]
{
0x8B, 0x0D, 0xAA, 0xAA, 0xAA, 0xAA, // MOV ecx [0xaaaaaaaa]
0x41, // INC ecx
0x4A // DEC edx
};
Console.WriteLine("===================================");
Console.WriteLine("Emulate i386 code that read from invalid memory.");
using (var emulator = new x86Emulator(x86Mode.b32))
{
// Map 2MB of memory.
emulator.Memory.Map(addr, 2 * 1024 * 1024, MemoryPermissions.All);
// Write machine code to be emulated.
emulator.Memory.Write(addr, code, code.Length);
// Initialize registers.
emulator.Registers.ECX = 0x1234;
emulator.Registers.EDX = 0x7890;
// Trace all basic blocks.
emulator.Hooks.Block.Add(BlockHook, null);
// Trace all instructions.
emulator.Hooks.Code.Add(CodeHook, null);
try
{
// Start emulating the machine written machine code.
emulator.Start(addr, addr + (ulong)code.Length);
}
catch (UnicornException ex)
{
Debug.Assert(ex.ErrorCode == Bindings.Error.ReadUnmapped, "Unexpected error code in caught UnicornException.");
Console.WriteLine($"Failed to start emulator instance. -> {ex.Message}.");
}
Console.WriteLine(">>> Emulation done. Below is the CPU context");
Console.WriteLine($">>> ECX = 0x{emulator.Registers.ECX.ToString("x2")}");
Console.WriteLine($">>> EDX = 0x{emulator.Registers.EDX.ToString("x2")}");
}
}
// test_i386_inout
public static void TestInOut()
{
var addr = 0x1000000UL;
var code = new byte[]
{
0x41, // INC ecx
0xE4, 0x3F, // IN AL 0x3F
0x4A, // DEC edx
0xE6, 0x46, // OUT 0x46 AL
0x43 // INC ebx
};
Console.WriteLine("===================================");
Console.WriteLine("Emulate i386 code with IN/OUT instructions.");
using (var emulator = new x86Emulator(x86Mode.b32))
{
// Map 2MB of memory.
emulator.Memory.Map(addr, 2 * 1024 * 1024, MemoryPermissions.All);
// Write machine code to be emulated.
emulator.Memory.Write(addr, code, code.Length);
// Initialize registers.
emulator.Registers.ECX = 0x1234;
emulator.Registers.EDX = 0x7890;
// Trace all basic blocks.
emulator.Hooks.Block.Add(BlockHook, null);
// Trace all instructions.
emulator.Hooks.Code.Add(CodeHook, null);
// Hook x86 IN instructions.
emulator.Hooks.Instruction.Add(HookIn, x86Instructions.IN, null);
// Hook x86 OUT instructions.
emulator.Hooks.Instruction.Add(HookOut, x86Instructions.OUT, null);
// Start emulating the machine written machine code.
emulator.Start(addr, addr + (ulong)code.Length);
Console.WriteLine(">>> Emulation done. Below is the CPU context");
Console.WriteLine($">>> ECX = 0x{emulator.Registers.ECX.ToString("x2")}");
Console.WriteLine($">>> EDX = 0x{emulator.Registers.EDX.ToString("x2")}");
}
}
// test_i386
public static void Test()
{
ulong addr = 0x1000000;
ulong esp = addr + 0x200000;
byte[] code =
{
0xeb, 0x1c, 0x5a, 0x89, 0xd6, 0x8b, 0x02, 0x66, 0x3d,
0xca, 0x7d, 0x75, 0x06, 0x66, 0x05, 0x03, 0x03, 0x89,
0x02, 0xfe, 0xc2, 0x3d, 0x41, 0x41, 0x41, 0x41, 0x75,
0xe9, 0xff, 0xe6, 0xe8, 0xdf, 0xff, 0xff, 0xff, 0x31,
0xd2, 0x6a, 0x0b, 0x58, 0x99, 0x52, 0x68, 0x2f, 0x2f,
0x73, 0x68, 0x68, 0x2f, 0x62, 0x69, 0x6e, 0x89, 0xe3,
0x52, 0x53, 0x89, 0xe1, 0xca, 0x7d, 0x41, 0x41, 0x41,
0x41, 0x41, 0x41, 0x41, 0x41
};
Console.WriteLine("Emulate i386 code");
using (var emulator = new x86Emulator(x86Mode.b32))
{
emulator.Memory.Map(addr, 2 * 1024 * 1024, MemoryPermissions.All);
emulator.Memory.Write(addr, code, code.Length);
emulator.Registers.ESP = (long)esp;
emulator.Hooks.Code.Add(HookCode, null);
emulator.Hooks.Interrupt.Add(HookInterrupt, null);
Console.WriteLine();
Console.WriteLine(">>> Start tracing this Linux code");
emulator.Start(addr, addr + (ulong)code.Length);
Console.WriteLine();
Console.WriteLine(">>> Emulation done.");
}
}
