From 1e78675aae0291a99b2c2574f31107a43f4753f0 Mon Sep 17 00:00:00 2001
From: HHHEEEWWW <288059553+HHHEEEWWW@users.noreply.github.com>
Date: Sat, 15 Aug 2026 23:20:29 +0800
Subject: [PATCH] Raise metadata registration sanity limit for Unity 6 games

Unity 6 (6000.x) games can have metadata registration count fields
above the old 0xC0000 sanity limit (e.g. Pax Autocratica after its
2026-08 update had ~0xD04C4). Candidates were rejected, so LibCpp2IL
failed with 'Failed to find code registration or metadata registration!'
and BepInEx could not generate interop assemblies.

Subsequent validation (typeDefinitionsSizesCount / numTypes vs the
metadata file) still checks candidates, so the limit only acts as a
coarse filter. Raise it to 0x400000 to cover larger games.
---
 LibCpp2IL/BinarySearcher.cs | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/LibCpp2IL/BinarySearcher.cs b/LibCpp2IL/BinarySearcher.cs
index 3cd152b6..2fe2dc52 100644
--- a/LibCpp2IL/BinarySearcher.cs
+++ b/LibCpp2IL/BinarySearcher.cs
@@ -349,10 +349,18 @@ public ulong FindMetadataRegistrationPost24_5()
                     if (i % 2 == 0)
                     {
                         //Count
-                        ok = mrWords[i] < 0xC_0000;
+                        // Sanity limit for metadata registration count fields.
+                        // Unity 6 (6000.x) games can legitimately exceed 0xC0000
+                        // (e.g. Pax Autocratica on 2026-08 update had ~0xD04C4),
+                        // which made real registrations get rejected and interop
+                        // generation fail with "Failed to find code registration
+                        // or metadata registration!". Subsequent checks
+                        // (typeDefinitionsSizesCount / numTypes vs metadata)
+                        // still validate candidates, so this is only a coarse filter.
+                        ok = mrWords[i] < 0x4_00000;
 
                         if (!ok)
-                            LibLogger.VerboseNewline($"\t\t\tRejected Metadata registration at 0x{va:X}, because it has a count field 0x{mrWords[i]:X} at offset {i} which is above sanity limit of 0xC0000. If metadata registration detection fails, may need to bump up the limit.");
+                            LibLogger.VerboseNewline($"\t\t\tRejected Metadata registration at 0x{va:X}, because it has a count field 0x{mrWords[i]:X} at offset {i} which is above sanity limit of 0x400000. If metadata registration detection fails, may need to bump up the limit.");
                     }
                     else
                     {