diff --git a/components/net/lwip-1.4.1/src/lwipopts.h b/components/net/lwip-1.4.1/src/lwipopts.h
index 312f4f83ec5cc1ef7f2c7e0b9659c16cfc602475..d7a6807cbd8c6f8bd8a85a34a1b5f3212666d6cf 100644
--- a/components/net/lwip-1.4.1/src/lwipopts.h
+++ b/components/net/lwip-1.4.1/src/lwipopts.h
@@ -218,11 +218,7 @@
 #define LWIP_DBG_TYPES_ON           (LWIP_DBG_ON|LWIP_DBG_TRACE|LWIP_DBG_STATE|LWIP_DBG_FRESH|LWIP_DBG_HALT)
 
 /* ---------- Memory options ---------- */
-#ifdef RT_USING_ASM_MEMCPY
 #define MEMCPY(dst,src,len)             rt_memcpy(dst,src,len)
-#else
-#define MEMCPY(dst,src,len)             memcpy(dst,src,len)
-#endif /* RT_USING_ASM_MEMCPY */
 #define SMEMCPY(dst,src,len)            MEMCPY(dst,src,len)
 
 #define MEM_ALIGNMENT               4
diff --git a/components/net/lwip-2.0.2/src/lwipopts.h b/components/net/lwip-2.0.2/src/lwipopts.h
index 9f5d03ebf7198f8962aa3e6ea2fac4fc1ba51333..5c99013d2ed7b98181a904e39737c908e4fc4e00 100644
--- a/components/net/lwip-2.0.2/src/lwipopts.h
+++ b/components/net/lwip-2.0.2/src/lwipopts.h
@@ -226,11 +226,7 @@
 #define LWIP_DBG_TYPES_ON           (LWIP_DBG_ON|LWIP_DBG_TRACE|LWIP_DBG_STATE|LWIP_DBG_FRESH|LWIP_DBG_HALT)
 
 /* ---------- Memory options ---------- */
-#ifdef RT_USING_ASM_MEMCPY
 #define MEMCPY(dst,src,len)             rt_memcpy(dst,src,len)
-#else
-#define MEMCPY(dst,src,len)             memcpy(dst,src,len)
-#endif /* RT_USING_ASM_MEMCPY */
 #define SMEMCPY(dst,src,len)            MEMCPY(dst,src,len)
 
 #ifdef RT_LWIP_MEM_ALIGNMENT
diff --git a/components/net/lwip-2.0.3/src/lwipopts.h b/components/net/lwip-2.0.3/src/lwipopts.h
index 9f5d03ebf7198f8962aa3e6ea2fac4fc1ba51333..5c99013d2ed7b98181a904e39737c908e4fc4e00 100644
--- a/components/net/lwip-2.0.3/src/lwipopts.h
+++ b/components/net/lwip-2.0.3/src/lwipopts.h
@@ -226,11 +226,7 @@
 #define LWIP_DBG_TYPES_ON           (LWIP_DBG_ON|LWIP_DBG_TRACE|LWIP_DBG_STATE|LWIP_DBG_FRESH|LWIP_DBG_HALT)
 
 /* ---------- Memory options ---------- */
-#ifdef RT_USING_ASM_MEMCPY
 #define MEMCPY(dst,src,len)             rt_memcpy(dst,src,len)
-#else
-#define MEMCPY(dst,src,len)             memcpy(dst,src,len)
-#endif /* RT_USING_ASM_MEMCPY */
 #define SMEMCPY(dst,src,len)            MEMCPY(dst,src,len)
 
 #ifdef RT_LWIP_MEM_ALIGNMENT
diff --git a/components/net/lwip-2.1.2/src/lwipopts.h b/components/net/lwip-2.1.2/src/lwipopts.h
index f5eb177d5d26c3688f9e773f10cd7bc681e502cb..95e88961d2215d20a764e24d39bea3e61874674b 100644
--- a/components/net/lwip-2.1.2/src/lwipopts.h
+++ b/components/net/lwip-2.1.2/src/lwipopts.h
@@ -238,11 +238,7 @@
 #endif
 
 /* ---------- Memory options ---------- */
-#ifdef RT_USING_ASM_MEMCPY
 #define MEMCPY(dst,src,len)             rt_memcpy(dst,src,len)
-#else
-#define MEMCPY(dst,src,len)             memcpy(dst,src,len)
-#endif /* RT_USING_ASM_MEMCPY */
 #define SMEMCPY(dst,src,len)            MEMCPY(dst,src,len)
 
 #define MEM_ALIGNMENT               4
diff --git a/src/Kconfig b/src/Kconfig
index 2bc37cf451dcc618acbc408893f361d95ef5a166..7c22752ed03a55a3145ad80ba904fa1b8988fec9 100644
--- a/src/Kconfig
+++ b/src/Kconfig
@@ -134,14 +134,6 @@ menu "kservice optimization"
         bool "Enable kservice to use tiny size"
         default n
 
-    config RT_USING_ASM_MEMCPY
-        bool
-        default n
-
-    config RT_USING_ASM_MEMSET
-        bool
-        default n
-
     config RT_USING_TINY_FFS
         bool "Enable kservice to use tiny finding first bit set method"
         default n
diff --git a/src/kservice.c b/src/kservice.c
index 5d4311507dc9001caeb0590f8d54be134ac45c7e..a44112481627a22d80e914b2c58d99281ec86875 100644
--- a/src/kservice.c
+++ b/src/kservice.c
@@ -115,7 +115,6 @@ int *_rt_errno(void)
 }
 RTM_EXPORT(_rt_errno);
 
-#ifndef RT_USING_ASM_MEMSET
 /**
  * This function will set the content of memory to specified value.
  *
@@ -128,7 +127,7 @@ RTM_EXPORT(_rt_errno);
  *
  * @return The address of source memory.
  */
-void *rt_memset(void *s, int c, rt_ubase_t count)
+RT_WEAK void *rt_memset(void *s, int c, rt_ubase_t count)
 {
 #ifdef RT_KSERVICE_USING_TINY_SIZE
     char *xs = (char *)s;
@@ -201,9 +200,7 @@ void *rt_memset(void *s, int c, rt_ubase_t count)
 #endif /* RT_KSERVICE_USING_TINY_SIZE */
 }
 RTM_EXPORT(rt_memset);
-#endif /* RT_USING_ASM_MEMSET */
 
-#ifndef RT_USING_ASM_MEMCPY
 /**
  * This function will copy memory content from source address to destination address.
  *
@@ -215,7 +212,7 @@ RTM_EXPORT(rt_memset);
  *
  * @return The address of destination memory
  */
-void *rt_memcpy(void *dst, const void *src, rt_ubase_t count)
+RT_WEAK void *rt_memcpy(void *dst, const void *src, rt_ubase_t count)
 {
 #ifdef RT_KSERVICE_USING_TINY_SIZE
     char *tmp = (char *)dst, *s = (char *)src;
@@ -287,7 +284,6 @@ void *rt_memcpy(void *dst, const void *src, rt_ubase_t count)
 #endif /* RT_KSERVICE_USING_TINY_SIZE */
 }
 RTM_EXPORT(rt_memcpy);
-#endif /* RT_USING_ASM_MEMCPY */
 
 #ifndef RT_KSERVICE_USING_STDLIB