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feat: inject exception handler dll after EasyHook

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This commit is contained in:
goat 2020-06-06 19:15:19 +02:00
parent e2ac9ddd43
commit 2ee990827b
3 changed files with 187 additions and 44 deletions
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65
Dalamud.Injector/Program.cs
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@ -1,8 +1,11 @@
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading;
using System.Windows.Forms;
@ -29,7 +32,7 @@ namespace Dalamud.Injector {
};
var pid = -1;
var pid = -1;
if (args.Length == 1) {
pid = int.Parse(args[0]);
}
@ -69,6 +72,9 @@ namespace Dalamud.Injector {
// Inject to process
Inject(process, startInfo);
// Inject exception handler
NativeInject(process);
}
private static void Inject(Process process, DalamudStartInfo info) {
@ -86,6 +92,63 @@ namespace Dalamud.Injector {
Console.WriteLine("Injected");
}
private static void NativeInject(Process process) {
var libPath = Path.GetFullPath("DalamudDebugStub.dll");
var handle = NativeFunctions.OpenProcess(
NativeFunctions.ProcessAccessFlags.All,
false,
process.Id);
if (handle == IntPtr.Zero)
throw new Win32Exception(Marshal.GetLastWin32Error(), "Could not OpenProcess");
var dllMem = NativeFunctions.VirtualAllocEx(
handle,
IntPtr.Zero,
libPath.Length,
NativeFunctions.AllocationType.Reserve | NativeFunctions.AllocationType.Commit,
NativeFunctions.MemoryProtection.ExecuteReadWrite);
if (dllMem == IntPtr.Zero)
throw new Win32Exception(Marshal.GetLastWin32Error(), "Could not alloc memory");
var pathBytes = Encoding.ASCII.GetBytes(libPath);
if (!NativeFunctions.WriteProcessMemory(
handle,
dllMem,
pathBytes,
pathBytes.Length,
out var bytesread
))
throw new Win32Exception(Marshal.GetLastWin32Error(), "Could not write DLL");
var kernel32 = NativeFunctions.GetModuleHandle("Kernel32.dll");
var loadLibA = NativeFunctions.GetProcAddress(kernel32, "LoadLibraryA");
var remoteThread = NativeFunctions.CreateRemoteThread(
handle,
IntPtr.Zero,
0,
loadLibA,
dllMem,
0,
IntPtr.Zero
);
if (remoteThread == IntPtr.Zero)
throw new Win32Exception(Marshal.GetLastWin32Error(), "Could not alloc memory");
NativeFunctions.VirtualFreeEx(
handle,
dllMem,
0,
NativeFunctions.AllocationType.Release);
NativeFunctions.CloseHandle(remoteThread);
NativeFunctions.CloseHandle(handle);
}
private static DalamudStartInfo GetDefaultStartInfo() {
var ffxivDir = Path.GetDirectoryName(process.MainModule.FileName);
var startInfo = new DalamudStartInfo {