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Merged
AdvDebug merged 2 commits into from
Jul 28, 2026
Merged

Add DPI awareness and guest process launch #10

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2dd672f
Add DPI awareness and guest process launch
AdvDebug Jul 27, 2026
4cdd407
Fix process identity and mailbox reuse bugs
AdvDebug Jul 28, 2026
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8 changes: 8 additions & 0 deletions Brovan/Core/Emulation/BinaryEmulator.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -257,6 +257,8 @@ public struct BinaryEmulatorSettings
/// </summary>
public string RawProgramArguments;

public string WorkingDirectory;

/// <summary>
/// Parsed arguments passed to the emulated process, excluding argv[0].
/// </summary>
Expand Down Expand Up @@ -370,6 +372,7 @@ public int Compare(MemoryRegion x, MemoryRegion y)
public bool Debug { get; set; }

public string RawProgramArguments { get; }
public string WorkingDirectory { get; }
public string[] ProgramArguments { get; }

public int IPRegister { get; private set; }
Expand Down Expand Up @@ -528,6 +531,7 @@ public BinaryEmulator(BinaryFile Binary, BinaryEmulatorSettings Settings)
this.Settings = Settings;
Debug = Settings.Debug;
RawProgramArguments = Settings.RawProgramArguments ?? string.Empty;
WorkingDirectory = Settings.WorkingDirectory;
ProgramArguments = Settings.ProgramArguments?.ToArray() ?? Array.Empty<string>();

if (_binary.Architecture == BinaryArchitecture.x64)
Expand Down Expand Up @@ -567,6 +571,7 @@ public BinaryEmulator(IGuestEnvironment Guest, BinaryEmulatorSettings Settings,
this.Settings = Settings;
Debug = Settings.Debug;
RawProgramArguments = Settings.RawProgramArguments ?? string.Empty;
WorkingDirectory = Settings.WorkingDirectory;
ProgramArguments = Settings.ProgramArguments?.ToArray() ?? Array.Empty<string>();

if (Guest is GenericGuest Generic)
Expand Down Expand Up @@ -2396,6 +2401,9 @@ public bool RunMlfqScheduler(uint BaseQuantumInstructions = 200000, int Levels =
{
SchedulerTick++;

if (WinHelper != null)
OS.Windows.RemoteProcessRequests.Drain(this);

bool ThreadOrderChanged = ThreadOrder.Count != KnownThreadOrderCount;
bool AgingDue = AgingThresholdSlices > 0 && SchedulerTick % AgingThresholdSlices == 0;
if (AgingDue)
Expand Down
44 changes: 38 additions & 6 deletions Brovan/Core/Emulation/Guests/WindowsGuest.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@
using System.Runtime.InteropServices;
using System.Text;
using Brovan.Core.Emulation.OS.Windows;
using Brovan.Core.Emulation.OS.Windows.Win32k;
using Brovan.Core.Helpers;
using static Brovan.Core.Emulation.OS.Windows.WinSysHelper;
using static Brovan.Core.Helpers.BinaryHelpers;
Expand Down Expand Up @@ -829,6 +830,7 @@ public ulong AllocateAndInitializeTEB(BinaryEmulator Instance, EmulatedThread Th
Instance._emulator.WriteMemory(Teb + Wow64InfoOffset + 0x0C, 0u);
Instance._emulator.WriteMemory(Teb + Wow64TlsWow64InfoOffset, (uint)(Teb + Wow64InfoOffset));

Win32kDpi.ApplyThreadContext(Instance, Teb);
return Teb;
}

Expand Down Expand Up @@ -859,6 +861,8 @@ public ulong AllocateAndInitializeTEB(BinaryEmulator Instance, EmulatedThread Th
SameTebFlags |= TEB_SAME_TEB_FLAG_SKIP_LOADER_INIT;
Instance._emulator.WriteMemory(Teb + TebSameTebFlagsOffset64, SameTebFlags, 2);
Instance._emulator.WriteMemory(Teb + 0x180C, (uint)0u);

Win32kDpi.ApplyThreadContext(Instance, Teb);
return Teb;
}

Expand Down Expand Up @@ -1157,6 +1161,36 @@ private void EnsureDirectBlobStandardHandles()
}
}

private static void JoinGuestSession(BinaryEmulator Instance, WinModule MainModule)
{
string ImageName = MainModule?.Name;
if (string.IsNullOrEmpty(ImageName))
ImageName = Path.GetFileName(Instance._binary?.Location ?? string.Empty);

GuestSessionRegistry.Join(
Instance.WinHelper.PID,
(uint)Instance._binary.Architecture,
ImageName,
ExitCode =>
{
Instance.TriggerEventMessage($"[!] Another process in the session asked this one to stop with exit code 0x{ExitCode:X}.", LogFlags.Important);
Instance.WinHelper.HideDesktopWindow();
Instance.StopEmulation();
});
}

private static string ResolveStartupDirectory(BinaryEmulator Instance, string ImagePath)
{
string Directory = Instance.WorkingDirectory;
if (string.IsNullOrWhiteSpace(Directory))
Directory = Path.GetDirectoryName(ImagePath);

if (string.IsNullOrWhiteSpace(Directory))
Directory = "C:\\";

return Directory.EndsWith("\\", StringComparison.Ordinal) ? Directory : Directory + "\\";
}

public void PrepareWinEnvironment(BinaryEmulator Instance, WinModule MainModule)
{
Instance.EnsureInstructionHook();
Expand All @@ -1171,6 +1205,8 @@ public void PrepareWinEnvironment(BinaryEmulator Instance, WinModule MainModule)
EnsureDirectBlobStandardHandles();

WinSyscallTable = HelperFunctions.BuildWinSyscallTable(Instance._binary.Architecture);
Win32kDpi.SeedFromImage(Instance, MainModule);
JoinGuestSession(Instance, MainModule);

ulong PageSize = 0x2000;
PEB = Instance.MapUniqueAddress(PageSize, MemoryProtection.ReadWrite);
Expand Down Expand Up @@ -1215,9 +1251,7 @@ public void PrepareWinEnvironment(BinaryEmulator Instance, WinModule MainModule)
string ImagePath = IsPeImage
? Instance._binary.Location
: (!string.IsNullOrWhiteSpace(Instance._binary.Location) ? Instance._binary.Location : (!string.IsNullOrWhiteSpace(MainModule.Path) ? MainModule.Path : (!string.IsNullOrWhiteSpace(MainModule.Name) ? MainModule.Name : "blob.bin")));
string CurrentDir = Path.GetDirectoryName(ImagePath) ?? "C:\\";
if (string.IsNullOrWhiteSpace(CurrentDir)) CurrentDir = "C:\\";
if (!CurrentDir.EndsWith("\\")) CurrentDir += "\\";
string CurrentDir = ResolveStartupDirectory(Instance, ImagePath);
string DesktopInfo = "Winsta0\\Default";
string WindowTitle = ImagePath;
string CommandLine = GeneralHelper.QuoteCommandLineArg(ImagePath);
Expand Down Expand Up @@ -1335,9 +1369,7 @@ private ulong BuildProcessParameters32(BinaryEmulator Instance, WinModule MainMo
string ImagePath = Instance._binary.Location;
if (string.IsNullOrWhiteSpace(ImagePath))
ImagePath = !string.IsNullOrWhiteSpace(MainModule.Path) ? MainModule.Path : (!string.IsNullOrWhiteSpace(MainModule.Name) ? MainModule.Name : "app.exe");
string CurrentDir = Path.GetDirectoryName(ImagePath) ?? "C:\\";
if (string.IsNullOrWhiteSpace(CurrentDir)) CurrentDir = "C:\\";
if (!CurrentDir.EndsWith("\\")) CurrentDir += "\\";
string CurrentDir = ResolveStartupDirectory(Instance, ImagePath);
string DesktopInfo = "Winsta0\\Default";
string WindowTitle = ImagePath;
string CommandLine = GeneralHelper.QuoteCommandLineArg(ImagePath);
Expand Down
3 changes: 3 additions & 0 deletions Brovan/Core/Emulation/OS/SharedHelpers/WindowManager/LinuxWinManager.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -32,6 +32,9 @@ public static partial class X11
[LibraryImport("libX11.so.6")]
public static partial int XDisplayHeight(IntPtr display, int screen);

[LibraryImport("libX11.so.6")]
public static partial IntPtr XResourceManagerString(IntPtr display);

[LibraryImport("libX11.so.6")]
public static partial nuint XWhitePixel(IntPtr display, int screen);

Expand Down
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