split launcher-fix into separate files

Author: qimiko

app/build.gradle.kts

@@ -78,7 +78,7 @@ android {
     }
     externalNativeBuild {
         cmake {
-            version = "3.25.0+"
+            version = "4.0.0+"
             path = file("src/main/cpp/CMakeLists.txt")
         }
     }

app/src/main/cpp/CMakeLists.txt

@@ -1,14 +1,15 @@
-cmake_minimum_required(VERSION 3.18.1)
+cmake_minimum_required(VERSION 4.1.2)
 
 project(launcherfix)
 
-add_library(launcherfix SHARED launcher-fix.cpp)
+add_library(launcherfix SHARED launcher-fix.cpp patcher.cpp)
 
 target_compile_features(launcherfix PUBLIC cxx_std_20)
 set_target_properties(launcherfix PROPERTIES CXX_EXTENSIONS OFF)
 
 set_target_properties(launcherfix PROPERTIES
     INTERPROCEDURAL_OPTIMIZATION ON
+    UNITY_BUILD ON
     C_VISIBILITY_PRESET hidden
     CXX_VISIBILITY_PRESET hidden
 )

app/src/main/cpp/base.h

@@ -0,0 +1,44 @@
+#pragma once
+
+#include <string>
+#include <array>
+
+#include <link.h>
+
+class DataPaths {
+public:
+    std::string original_data_path{};
+    std::string data_path{};
+    std::string load_symbols_from{};
+
+    bool patch_exceptions{};
+
+    static DataPaths& get_instance();
+
+private:
+    DataPaths() {}
+};
+
+// this is every function that i thought would be relevant
+constexpr std::array remove_symbols{
+        "__gxx_personality_v0",
+        "__cxa_throw",
+        "__cxa_rethrow",
+        "__cxa_allocate_exception",
+        "__cxa_end_catch",
+        "__cxa_begin_catch",
+        "__cxa_guard_abort",
+        "__cxa_guard_acquire",
+        "__cxa_guard_release",
+        "__cxa_free_exception"
+
+        // android 10's libc doesn't have these symbols
+        // and the ndk is forbidden from exporting them!! so keep it for old mods...
+        // "_Unwind_RaiseException",
+        // "_Unwind_Resume"
+};
+
+FILE* fopen_hook(const char* pathname, const char* mode);
+int rename_hook(const char* old_path, const char* new_path);
+
+int on_dl_iterate(dl_phdr_info* info, size_t size, void* data);