diff --git a/src/main/jni/Android.mk b/src/main/jni/Android.mk
index 796ca06ff7..ab34275cad 100755
--- a/src/main/jni/Android.mk
+++ b/src/main/jni/Android.mk
@@ -304,13 +304,13 @@ openssl_subdirs := $(addprefix $(LOCAL_PATH)/openssl/,$(addsuffix /Android.mk, \
 include $(openssl_subdirs)
 
 # Iptables
-LOCAL_PATH := $(ROOT_PATH)
-iptables_subdirs := $(addprefix $(LOCAL_PATH)/iptables/,$(addsuffix /Android.mk, \
-	iptables \
-	extensions \
-	libiptc \
-	))
-include $(iptables_subdirs)
+# LOCAL_PATH := $(ROOT_PATH)
+# iptables_subdirs := $(addprefix $(LOCAL_PATH)/iptables/,$(addsuffix /Android.mk, \
+# 	iptables \
+# 	extensions \
+# 	libiptc \
+# 	))
+# include $(iptables_subdirs)
 
 # Import cpufeatures
 $(call import-module,android/cpufeatures)
diff --git a/src/main/jni/Application.mk b/src/main/jni/Application.mk
index d8820faad0..d3fa0156b1 100644
--- a/src/main/jni/Application.mk
+++ b/src/main/jni/Application.mk
@@ -1,4 +1,4 @@
-APP_ABI      			:= armeabi-v7a x86
+APP_ABI      			:= armeabi-v7a arm64-v8a x86 x86_64
 APP_PLATFORM 			:= android-16
 APP_STL      			:= stlport_static
 NDK_TOOLCHAIN_VERSION 	:= 4.9
diff --git a/src/main/jni/libevent/arc4random.c b/src/main/jni/libevent/arc4random.c
index cabc46f4b8..15fee1cceb 100644
--- a/src/main/jni/libevent/arc4random.c
+++ b/src/main/jni/libevent/arc4random.c
@@ -477,6 +477,7 @@ arc4random(void)
 }
 #endif
 
+#ifndef _EVENT_HAVE_ARC4RANDOM_BUF
 ARC4RANDOM_EXPORT void
 arc4random_buf(void *_buf, size_t n)
 {
@@ -490,6 +491,7 @@ arc4random_buf(void *_buf, size_t n)
 	}
 	_ARC4_UNLOCK();
 }
+#endif
 
 #ifndef ARC4RANDOM_NOUNIFORM
 /*
diff --git a/src/main/jni/libevent/epoll_sub.c b/src/main/jni/libevent/epoll_sub.c
index 3738b26bf1..3feda901b4 100644
--- a/src/main/jni/libevent/epoll_sub.c
+++ b/src/main/jni/libevent/epoll_sub.c
@@ -31,11 +31,20 @@
 #include <sys/syscall.h>
 #include <sys/epoll.h>
 #include <unistd.h>
+#include <errno.h>
 
 int
 epoll_create(int size)
 {
-	return (syscall(__NR_epoll_create, size));
+#if !defined(__NR_epoll_create) && defined(__NR_epoll_create1)
+    if (size <= 0) {
+        errno = EINVAL;
+        return -1;
+    }
+    return (syscall(__NR_epoll_create1, 0));
+#else
+    return (syscall(__NR_epoll_create, size));
+#endif
 }
 
 int
@@ -48,5 +57,9 @@ epoll_ctl(int epfd, int op, int fd, struct epoll_event *event)
 int
 epoll_wait(int epfd, struct epoll_event *events, int maxevents, int timeout)
 {
-	return (syscall(__NR_epoll_wait, epfd, events, maxevents, timeout));
+#if !defined(__NR_epoll_wait) && defined(__NR_epoll_pwait)
+    return (syscall(__NR_epoll_pwait, epfd, events, maxevents, timeout, NULL, 0));
+#else
+    return (syscall(__NR_epoll_wait, epfd, events, maxevents, timeout));
+#endif
 }
diff --git a/src/main/jni/libevent/include/event2/event-config.h b/src/main/jni/libevent/include/event2/event-config.h
index 85518dedbf..3d363bef03 100644
--- a/src/main/jni/libevent/include/event2/event-config.h
+++ b/src/main/jni/libevent/include/event2/event-config.h
@@ -24,10 +24,12 @@
 /* #undef _EVENT_DISABLE_THREAD_SUPPORT */
 
 /* Define to 1 if you have the `arc4random' function. */
+#if !defined(__aarch64__) && !defined(__x86_64__)
 #define _EVENT_HAVE_ARC4RANDOM 1
+#endif
 
 /* Define to 1 if you have the `arc4random_buf' function. */
-/* #undef _EVENT_HAVE_ARC4RANDOM_BUF */
+#define _EVENT_HAVE_ARC4RANDOM_BUF
 
 /* Define to 1 if you have the <arpa/inet.h> header file. */
 #define _EVENT_HAVE_ARPA_INET_H 1
@@ -262,7 +264,7 @@
 /* #undef _EVENT_HAVE_STRUCT_SOCKADDR_STORAGE___SS_FAMILY */
 
 /* Define to 1 if you have the `sysctl' function. */
-#define _EVENT_HAVE_SYSCTL 1
+// #define _EVENT_HAVE_SYSCTL 1
 
 /* Define to 1 if you have the <sys/devpoll.h> header file. */
 /* #undef _EVENT_HAVE_SYS_DEVPOLL_H */
@@ -301,7 +303,7 @@
 #define _EVENT_HAVE_SYS_STAT_H 1
 
 /* Define to 1 if you have the <sys/sysctl.h> header file. */
-#define _EVENT_HAVE_SYS_SYSCTL_H 1
+//#define _EVENT_HAVE_SYS_SYSCTL_H 1
 
 /* Define to 1 if you have the <sys/time.h> header file. */
 #define _EVENT_HAVE_SYS_TIME_H 1
diff --git a/src/main/jni/openssl/android-config.mk b/src/main/jni/openssl/android-config.mk
index 4a4f21514b..1fa94a3712 100644
--- a/src/main/jni/openssl/android-config.mk
+++ b/src/main/jni/openssl/android-config.mk
@@ -15,7 +15,7 @@ LOCAL_CFLAGS += -DOPENSSL_NO_EC_NISTP_64_GCC_128 -DOPENSSL_NO_SCTP \
 # LOCAL_CFLAGS += -DOPENSSL_NO_DEPRECATED
 
 # Extra
-LOCAL_CFLAGS += -DOPENSSL_NO_HW -DOPENSSL_NO_ENGINE -DZLIB
+LOCAL_CFLAGS += -DOPENSSL_NO_HW -DOPENSSL_NO_ASM -DOPENSSL_NO_ENGINE -DZLIB
 
 # Debug
 # LOCAL_CFLAGS += -DCIPHER_DEBUG
diff --git a/src/main/jni/pdnsd/config.h b/src/main/jni/pdnsd/config.h
index 3c136abfe3..3740beae73 100644
--- a/src/main/jni/pdnsd/config.h
+++ b/src/main/jni/pdnsd/config.h
@@ -219,7 +219,9 @@
 #define HAVE_FCNTL_H 1
 
 /* Define to 1 if you have the `getline' function. */
-//#define HAVE_GETLINE 1
+#if defined(__aarch64__) || defined(__x86_64__)
+#define HAVE_GETLINE 1
+#endif
 
 /* Define to 1 if you have the `getpwnam_r' function. */
 //#define HAVE_GETPWNAM_R 1
@@ -282,7 +284,9 @@
 #define HAVE_STDLIB_H 1
 
 /* Define to 1 if you have the `stpcpy' function. */
-//#define HAVE_STPCPY 1
+#if defined(__aarch64__) || defined(__x86_64__)
+#define HAVE_STPCPY 1
+#endif
 
 /* Define to 1 if you have the `stpncpy' function. */
 //#define HAVE_STPNCPY 1
diff --git a/src/main/jni/pdnsd/src/ipvers.h b/src/main/jni/pdnsd/src/ipvers.h
index e14b9aa4fb..b1d7a2cd9f 100644
--- a/src/main/jni/pdnsd/src/ipvers.h
+++ b/src/main/jni/pdnsd/src/ipvers.h
@@ -151,7 +151,9 @@ __cmsg_nxthdr (struct msghdr *__mhdr, struct cmsghdr *__cmsg) __THROW
 
 /* This is the IPv6 flowid that we pass on to the IPv6 protocol stack. This value was not currently defined
  * at the time of writing. Should this change, define a appropriate flowinfo here. */
+#ifndef IPV6_FLOWINFO
 #define IPV6_FLOWINFO 0
+#endif
 
 /* There does not seem to be a function/macro to generate IPv6-mapped IPv4-Adresses. So here comes mine.
  * Pass an in_addr* and an in6_addr* */
diff --git a/src/main/scala/com/github/shadowsocks/Shadowsocks.scala b/src/main/scala/com/github/shadowsocks/Shadowsocks.scala
index e56a5fa809..1145525a4f 100644
--- a/src/main/scala/com/github/shadowsocks/Shadowsocks.scala
+++ b/src/main/scala/com/github/shadowsocks/Shadowsocks.scala
@@ -830,14 +830,6 @@ class Shadowsocks
 
     crash_recovery()
 
-    copyAssets(System.getABI)
-
-    val ab = new ArrayBuffer[String]
-    for (executable <- Shadowsocks.EXECUTABLES) {
-      ab.append("chmod 755 " + Path.BASE + executable)
-    }
-    Console.runCommand(ab.toArray)
-
   }
 
   private def recovery() {
diff --git a/src/main/scala/com/github/shadowsocks/utils/Utils.scala b/src/main/scala/com/github/shadowsocks/utils/Utils.scala
index 7c2b347484..fd62d047a3 100644
--- a/src/main/scala/com/github/shadowsocks/utils/Utils.scala
+++ b/src/main/scala/com/github/shadowsocks/utils/Utils.scala
@@ -68,8 +68,8 @@ object Utils {
   val DEFAULT_SHELL: String = "/system/bin/sh"
   val DEFAULT_ROOT: String = "/system/bin/su"
   val ALTERNATIVE_ROOT: String = "/system/xbin/su"
-  val DEFAULT_IPTABLES: String = "/data/data/com.github.shadowsocks/iptables"
-  val ALTERNATIVE_IPTABLES: String = "/system/bin/iptables"
+  val DEFAULT_IPTABLES: String = "/system/bin/iptables"
+  val ALTERNATIVE_IPTABLES: String = "/data/data/com.github.shadowsocks/iptables"
   val TIME_OUT: Int = -99
   var initialized: Boolean = false
   var hasRedirectSupport: Int = -1