From 93a82c0441b0014cb96770eae05767b8fb92d6f5 Mon Sep 17 00:00:00 2001
From: hexkyz <mike.hexkyz@gmail.com>
Date: Thu, 2 Apr 2026 01:42:53 +0100
Subject: [PATCH] loader: patch am to recover homebrew compatibility

This patch is to be removed if/once hbmenu/libnx re-designs the exiting logic
---
 .../loader/source/ldr_embedded_am_patches.inc | 24 +++++++++++++++++++
 stratosphere/loader/source/ldr_patcher.cpp    | 13 ++++++++++
 2 files changed, 37 insertions(+)
 create mode 100644 stratosphere/loader/source/ldr_embedded_am_patches.inc

diff --git a/stratosphere/loader/source/ldr_embedded_am_patches.inc b/stratosphere/loader/source/ldr_embedded_am_patches.inc
new file mode 100644
index 000000000..74de114e4
--- /dev/null
+++ b/stratosphere/loader/source/ldr_embedded_am_patches.inc
@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Patch teardown function call to NOP. */
+constexpr inline const EmbeddedPatchEntry AmDisableTeardownPatches_22_0_0[] = {
+    { 0x5CC4C, "\x1F\x20\x03\xD5", 4 },
+};
+
+constexpr inline const EmbeddedPatch AmDisableTeardownPatches[] = {
+    { ParseModuleId("B337F7C5AD53E55F3D920FCD394B4DE7C3B7D606"), util::size(AmDisableTeardownPatches_22_0_0), AmDisableTeardownPatches_22_0_0 }, /* 22.0.0 */
+};
diff --git a/stratosphere/loader/source/ldr_patcher.cpp b/stratosphere/loader/source/ldr_patcher.cpp
index a014067c6..c78b3919b 100644
--- a/stratosphere/loader/source/ldr_patcher.cpp
+++ b/stratosphere/loader/source/ldr_patcher.cpp
@@ -108,6 +108,7 @@ namespace ams::ldr {
         };
 
         #include "ldr_embedded_usb_patches.inc"
+        #include "ldr_embedded_am_patches.inc"
 
     }
 
@@ -140,6 +141,18 @@ namespace ams::ldr {
                 }
             }
         }
+        
+        /* TODO: Remove this if/when a cleaner solution is implemented by hbmenu/libnx. */
+        for (const auto &patch : AmDisableTeardownPatches) {
+            if (std::memcmp(std::addressof(patch.module_id), std::addressof(module_id), sizeof(module_id)) == 0) {
+                for (size_t i = 0; i < patch.num_entries; ++i) {
+                    const auto &entry = patch.entries[i];
+                    if (entry.offset + entry.size <= mapped_size) {
+                        std::memcpy(reinterpret_cast<void *>(mapped_nso + entry.offset), entry.data, entry.size);
+                    }
+                }
+            }
+        }
     }
 
 }
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