From c72bd2174e5c3a8460822b98e18f9fd247c8d1d5 Mon Sep 17 00:00:00 2001
From: LukeFZ <17146677+LukeFZ@users.noreply.github.com>
Date: Tue, 23 Dec 2025 00:51:00 +0100
Subject: [PATCH] add additional heuristics for metadata registration

closes #35
---
 Il2CppInspector.Common/IL2CPP/ImageScan.cs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Il2CppInspector.Common/IL2CPP/ImageScan.cs b/Il2CppInspector.Common/IL2CPP/ImageScan.cs
index b139fb3..ae7af7b 100644
--- a/Il2CppInspector.Common/IL2CPP/ImageScan.cs
+++ b/Il2CppInspector.Common/IL2CPP/ImageScan.cs
@@ -282,13 +282,18 @@ namespace Il2CppInspector
             // but I know of at least one binary where this will break detection.
             // Testing showed that we can just use the same heuristic used for v27+
             // on older versions as well, so we'll just use it for all cases.
+
+            // On some 32-bit (arm) binaries, just checking fields with the type count is not sufficient
+            // for uniquely identifying the metareg. We assume that all binaries have at least one generic class + inst
+            // and use this for an additional heuristic, though this is kinda jank and might not be enough for all binaries
             if (Image.Version >= MetadataVersions.V190)
             {
                 foreach (var va in vas)
                 {
                     var mr = Image.ReadMappedVersionedObject<Il2CppMetadataRegistration>(va);
                     if (mr.TypeDefinitionsSizesCount == metadata.Types.Length
-                        && mr.FieldOffsetsCount == metadata.Types.Length)
+                        && mr.FieldOffsetsCount == metadata.Types.Length
+                        && mr is { GenericInstsCount: > 0, GenericClassesCount: > 0 })
                     {
                         metadataRegistration = va;
                         break;