diff --git a/core/src/main/cpp/main/api/zygisk_main.cpp b/core/src/main/cpp/main/api/zygisk_main.cpp
index 90a48be0..35bb3645 100644
--- a/core/src/main/cpp/main/api/zygisk_main.cpp
+++ b/core/src/main/cpp/main/api/zygisk_main.cpp
@@ -319,11 +319,11 @@ namespace lspd {
             if (*allowUnload) api_->setOption(zygisk::DLCLOSE_MODULE_LIBRARY);
         }
 
-        void preServerSpecialize(zygisk::ServerSpecializeArgs *) override {
+        void preServerSpecialize([[maybe_unused]] zygisk::ServerSpecializeArgs *args) override {
             Context::GetInstance()->OnNativeForkSystemServerPre(env_);
         }
 
-        void postServerSpecialize(const zygisk::ServerSpecializeArgs *) override {
+        void postServerSpecialize([[maybe_unused]] const zygisk::ServerSpecializeArgs *args) override {
             if (__system_property_find("ro.vendor.product.ztename")) {
                 auto *process = env_->FindClass("android/os/Process");
                 auto *set_argv0 = env_->GetStaticMethodID(process, "setArgV0",
diff --git a/core/src/main/cpp/main/src/service.cpp b/core/src/main/cpp/main/src/service.cpp
index dc8616bc..c1da4a44 100644
--- a/core/src/main/cpp/main/src/service.cpp
+++ b/core/src/main/cpp/main/src/service.cpp
@@ -322,7 +322,7 @@ namespace lspd {
         }
         auto parcel_fd = JNI_CallObjectMethod(env, reply, read_file_descriptor_method_);
         int fd = JNI_CallIntMethod(env, parcel_fd, detach_fd_method_);
-        auto size = JNI_CallLongMethod(env, reply, read_long_method_);
+        auto size = static_cast<size_t>(JNI_CallLongMethod(env, reply, read_long_method_));
         JNI_CallVoidMethod(env, data, recycleMethod_);
         JNI_CallVoidMethod(env, reply, recycleMethod_);
 
diff --git a/core/src/main/java/org/lsposed/lspd/core/Main.java b/core/src/main/java/org/lsposed/lspd/core/Main.java
index 655faa2d..aaecb606 100644
--- a/core/src/main/java/org/lsposed/lspd/core/Main.java
+++ b/core/src/main/java/org/lsposed/lspd/core/Main.java
@@ -28,13 +28,15 @@ import android.os.Environment;
 import android.os.IBinder;
 import android.os.Process;
 
+import com.android.internal.os.ZygoteInit;
+
 import org.lsposed.lspd.BuildConfig;
 import org.lsposed.lspd.config.LSPApplicationServiceClient;
 import org.lsposed.lspd.deopt.PrebuiltMethodsDeopter;
 import org.lsposed.lspd.hooker.CrashDumpHooker;
 import org.lsposed.lspd.hooker.HandleBindAppHooker;
 import org.lsposed.lspd.hooker.LoadedApkCstrHooker;
-import org.lsposed.lspd.hooker.SystemMainHooker;
+import org.lsposed.lspd.hooker.HandleSystemServerProcessHooker;
 import org.lsposed.lspd.util.ParasiticManagerHooker;
 import org.lsposed.lspd.util.Utils;
 import org.lsposed.lspd.yahfa.hooker.YahfaHooker;
@@ -51,8 +53,8 @@ public class Main {
         XposedHelpers.findAndHookMethod(Thread.class, "dispatchUncaughtException",
                 Throwable.class, new CrashDumpHooker());
         if (isSystem) {
-            XposedHelpers.findAndHookMethod(ActivityThread.class,
-                    "systemMain", new SystemMainHooker());
+            XposedBridge.hookAllMethods(ZygoteInit.class,
+                    "handleSystemServerProcess", new HandleSystemServerProcessHooker());
         }
         XposedHelpers.findAndHookMethod(ActivityThread.class,
                 "handleBindApplication",
diff --git a/core/src/main/java/org/lsposed/lspd/hooker/SystemMainHooker.java b/core/src/main/java/org/lsposed/lspd/hooker/HandleSystemServerProcessHooker.java
similarity index 71%
rename from core/src/main/java/org/lsposed/lspd/hooker/SystemMainHooker.java
rename to core/src/main/java/org/lsposed/lspd/hooker/HandleSystemServerProcessHooker.java
index 34159a33..2f37dd82 100644
--- a/core/src/main/java/org/lsposed/lspd/hooker/SystemMainHooker.java
+++ b/core/src/main/java/org/lsposed/lspd/hooker/HandleSystemServerProcessHooker.java
@@ -20,33 +20,29 @@
 
 package org.lsposed.lspd.hooker;
 
-import android.os.Build;
-
 import org.lsposed.lspd.deopt.PrebuiltMethodsDeopter;
 import org.lsposed.lspd.util.Hookers;
 
 import de.robv.android.xposed.XC_MethodHook;
+import de.robv.android.xposed.XposedBridge;
 import de.robv.android.xposed.XposedHelpers;
 
 // system_server initialization
-public class SystemMainHooker extends XC_MethodHook {
+public class HandleSystemServerProcessHooker extends XC_MethodHook {
 
     public static volatile ClassLoader systemServerCL;
 
     @Override
     protected void afterHookedMethod(MethodHookParam param) {
-        Hookers.logD("ActivityThread#systemMain() starts");
+        Hookers.logD("ZygoteInit#handleSystemServerProcess() starts");
         try {
             // get system_server classLoader
             systemServerCL = Thread.currentThread().getContextClassLoader();
             // deopt methods in SYSTEMSERVERCLASSPATH
             PrebuiltMethodsDeopter.deoptSystemServerMethods(systemServerCL);
-            var sbsHooker = new StartBootstrapServicesHooker();
-            Object[] paramTypesAndCallback = Build.VERSION.SDK_INT >= Build.VERSION_CODES.R ?
-                    new Object[]{"com.android.server.utils.TimingsTraceAndSlog", sbsHooker} :
-                    new Object[]{sbsHooker};
-            XposedHelpers.findAndHookMethod("com.android.server.SystemServer",
-                    systemServerCL, "startBootstrapServices", paramTypesAndCallback);
+            XposedBridge.hookAllMethods(
+                    XposedHelpers.findClass("com.android.server.SystemServer", systemServerCL),
+                    "startBootstrapServices", new StartBootstrapServicesHooker());
         } catch (Throwable t) {
             Hookers.logE("error when hooking systemMain", t);
         }
diff --git a/core/src/main/java/org/lsposed/lspd/hooker/StartBootstrapServicesHooker.java b/core/src/main/java/org/lsposed/lspd/hooker/StartBootstrapServicesHooker.java
index 0ae91b73..2e8f4351 100644
--- a/core/src/main/java/org/lsposed/lspd/hooker/StartBootstrapServicesHooker.java
+++ b/core/src/main/java/org/lsposed/lspd/hooker/StartBootstrapServicesHooker.java
@@ -41,7 +41,7 @@ public class StartBootstrapServicesHooker extends XC_MethodHook {
             XC_LoadPackage.LoadPackageParam lpparam = new XC_LoadPackage.LoadPackageParam(XposedBridge.sLoadedPackageCallbacks);
             lpparam.packageName = "android";
             lpparam.processName = "android"; // it's actually system_server, but other functions return this as well
-            lpparam.classLoader = SystemMainHooker.systemServerCL;
+            lpparam.classLoader = HandleSystemServerProcessHooker.systemServerCL;
             lpparam.appInfo = null;
             lpparam.isFirstApplication = true;
             XC_LoadPackage.callAll(lpparam);
diff --git a/hiddenapi-stubs/src/main/java/com/android/internal/os/ZygoteInit.java b/hiddenapi-stubs/src/main/java/com/android/internal/os/ZygoteInit.java
new file mode 100644
index 00000000..243b350a
--- /dev/null
+++ b/hiddenapi-stubs/src/main/java/com/android/internal/os/ZygoteInit.java
@@ -0,0 +1,4 @@
+package com.android.internal.os;
+
+public class ZygoteInit {
+}