Fixed #605

Author: Perfare

Il2CppDumper/ExecutableFormats/WebAssembly.cs

@@ -46,13 +46,15 @@ public WebAssembly(Stream stream) : base(stream)
 
         public WebAssemblyMemory CreateMemory()
         {
+            var last = dataSections[dataSections.Length - 1];
+            var bssStart = last.Offset + (uint)last.Data.Length;
             var stream = new MemoryStream(new byte[Length]);
             foreach (var dataSection in dataSections)
             {
                 stream.Position = dataSection.Offset;
                 stream.Write(dataSection.Data, 0, dataSection.Data.Length);
             }
-            return new WebAssemblyMemory(stream, Is32Bit);
+            return new WebAssemblyMemory(stream, bssStart);
         }
     }
 }

Il2CppDumper/ExecutableFormats/WebAssemblyMemory.cs

@@ -4,9 +4,12 @@ namespace Il2CppDumper
 {
     public sealed class WebAssemblyMemory : Il2Cpp
     {
-        public WebAssemblyMemory(Stream stream, bool is32Bit) : base(stream)
+        private uint bssStart;
+
+        public WebAssemblyMemory(Stream stream, uint bssStart) : base(stream)
         {
-            Is32Bit = is32Bit;
+            Is32Bit = true;
+            this.bssStart = bssStart;
         }
 
         public override ulong MapVATR(ulong addr)
@@ -55,9 +58,9 @@ public override SectionHelper GetSectionHelper(int methodCount, int typeDefiniti
             };
             var bss = new SearchSection
             {
-                offset = Length,
+                offset = bssStart,
                 offsetEnd = long.MaxValue, //hack
-                address = Length,
+                address = bssStart,
                 addressEnd = long.MaxValue //hack
             };
             var sectionHelper = new SectionHelper(this, methodCount, typeDefinitionsCount, metadataUsagesCount, imageCount);

Il2CppDumper/Utils/SectionHelper.cs

@@ -220,7 +220,7 @@ private ulong FindMetadataRegistrationOld()
             foreach (var section in data)
             {
                 il2Cpp.Position = section.offset;
-                while (il2Cpp.Position < section.offsetEnd)
+                while (il2Cpp.Position < section.offsetEnd - il2Cpp.PointerSize)
                 {
                     var addr = il2Cpp.Position;
                     if (il2Cpp.ReadIntPtr() == typeDefinitionsCount)