improve: rewrite to C; add: Java 21 support

.gitignore

@@ -1,11 +1,8 @@
-*.iml
-.gradle
-/local.properties
-.idea/
-.DS_Store
-build/
-.cxx/
-/captures
-.externalNativeBuild
-.cxx
-local.properties
+*
+
+!module/customize.sh
+!src/
+!.gitignore
+!LICENSE
+!Makefile
+!README.md

Makefile

@@ -0,0 +1,65 @@
+NDK_PATH := $(ANDROID_HOME)/ndk/29.0.14206865
+.DEFAULT_GOAL := all
+
+CCA := $(NDK_PATH)/toolchains/llvm/prebuilt/linux-x86_64/bin/clang
+
+# Zygisk related variables
+ZYGISK_FILES := src/native/dex.c src/native/main.c
+
+# Java related variables
+PLATFORM_VERSION := 36
+BUILD_TOOLS_VERSION := 36.1.0
+D8 := $(ANDROID_HOME)/build-tools/$(BUILD_TOOLS_VERSION)/d8
+
+MODULE_ID                 ?= zygote_loader_example
+MODULE_NAME               ?= ZygoteLoader Example
+MODULE_AUTHOR             ?= v7878
+MODULE_DESC               ?= An example Zygisk module
+MODULE_ENTRY              ?= com.example.zygote_loader.EntryPoint
+MODULE_ARCHIVE            ?= ZygoteLoader.zip
+MODULE_UPDATE_JSON        ?= https://example.com/zygote_loader_update.json
+MODULE_ATTACH_NATIVE_LIBS ?= false
+
+clean:
+	@echo Cleaning build artifacts...
+	@rm -rf build module/module.prop module/classes.dex module/zygisk
+
+all:
+	@echo Creating build directory...
+	@mkdir -p build
+
+	@echo Building Zygisk library...
+	@$(CCA) --target=aarch64-linux-android25 -shared -fPIC $(ZYGISK_FILES) -Isrc/native/ -o build/libzloader-arm64-v8a.so
+	@$(CCA) --target=armv7a-linux-androideabi25 -shared -fPIC $(ZYGISK_FILES) -Isrc/native/ -o build/libzloader-armeabi-v7a.so
+	@$(CCA) --target=x86_64-linux-android25 -shared -fPIC $(ZYGISK_FILES) -Isrc/native/ -o build/libzloader-x86_64.so
+	@$(CCA) --target=i686-linux-android25 -shared -fPIC $(ZYGISK_FILES) -Isrc/native/ -o build/libzloader-x86.so
+
+	@echo Building Java classes.dex...
+	@javac -d build/classes src/java/*.java -cp $(ANDROID_HOME)/platforms/android-$(PLATFORM_VERSION)/android.jar
+	@jar -cf build/classes.jar -C build/classes .
+	@echo Dexing to classes.dex...
+	@$(D8) --output build --lib $(ANDROID_HOME)/platforms/android-$(PLATFORM_VERSION)/android.jar build/classes.jar
+	@echo Cleaning up...
+	@rm -rf build/classes build/classes.jar
+
+	@echo Creating module.prop...
+	@printf '%s\n' \
+		'id=$(MODULE_ID)' \
+		'name=$(MODULE_NAME)' \
+		'author=$(MODULE_AUTHOR)' \
+		'description=$(MODULE_DESC)' \
+		'entrypoint=$(MODULE_ENTRY)' \
+		'updateJson=$(MODULE_UPDATE_JSON)' \
+		'attachNativeLibs=$(MODULE_ATTACH_NATIVE_LIBS)' \
+	> module/module.prop
+
+	@echo Transfering files to module directory...
+	@cp build/classes.dex module/
+	@mkdir -p module/zygisk
+	@cp build/libzloader-arm64-v8a.so module/zygisk/arm64-v8a.so
+	@cp build/libzloader-armeabi-v7a.so module/zygisk/armeabi-v7a.so
+	@cp build/libzloader-x86_64.so module/zygisk/x86_64.so
+	@cp build/libzloader-x86.so module/zygisk/x86.so
+
+	@echo Creating module archive...
+	@cd module && zip -r ../$(MODULE_ARCHIVE) . > /dev/null