IL2CPP: Add metadata 27.1 structure layout (#139)

Il2CppInspector.Common/IL2CPP/Il2CppBinaryClasses.cs

@@ -37,6 +37,8 @@ namespace Il2CppInspector
 
         public ulong genericMethodPointersCount;
         public ulong genericMethodPointers;
+        [Version(Min = 27.1)] 
+        public ulong genericAdjustorThunks;
         public ulong invokerPointersCount;
         public ulong invokerPointers;
 
@@ -82,6 +84,10 @@ namespace Il2CppInspector
         public ulong moduleName;
         public ulong methodPointerCount;
         public ulong methodPointers;
+        [Version(Min = 27.1)] 
+        public long adjustorThunkCount;
+        [Version(Min = 27.1)]
+        public ulong adjustorThunks; //Pointer
         public ulong invokerIndices;
         public ulong reversePInvokeWrapperCount;
         public ulong reversePInvokeWrapperIndices;
@@ -250,5 +256,7 @@ namespace Il2CppInspector
     {
         public int methodIndex;
         public int invokerIndex;
+        [Version(Min = 27.1)] 
+        public int adjustorThunk;
     }
 }

Il2CppInspector.Common/IL2CPP/ImageScan.cs

@@ -138,6 +138,14 @@ namespace Il2CppInspector
                     Image.Version = 24.3;
                     codeRegistration -= ptrSize * 2; // two extra words for WindowsRuntimeFactory
                 }
+
+                if (Image.Version == 27 && cr.reversePInvokeWrapperCount > 0x30000)
+                {
+                    // If reversePInvokeWrapperCount is a pointer, then it's because we're actually on 27.1 and there's a genericAdjustorThunks pointer interfering.
+                    // We need to bump version to 27.1 and back up one more pointer.
+                    Image.Version = 27.1;
+                    codeRegistration -= ptrSize;
+                }
             }
 
             // Find CodeRegistration