diff --git a/src/arch/x86_64/ustring.asm b/src/arch/x86_64/ustring.asm
index 8da21cbf..58282301 100644
--- a/src/arch/x86_64/ustring.asm
+++ b/src/arch/x86_64/ustring.asm
@@ -4,17 +4,49 @@ global arch_u_strlen
 global arch_u_strlen_cont
 
 arch_u_strlen:
-    xor rcx, rcx
-   .loop:
-        cmp byte [rdi],0
-        je .done
-        inc rcx
-        inc rdi
-	jmp .loop
-    .done:
-    mov [rsi], rcx
-    xor rax, rax
-    ret
+	xor rcx, rcx
+	.loop:
+		cmp byte [rdi],0
+		je .done
+		inc rcx
+		inc rdi
+		jmp .loop
+	.done:
+	mov [rsi], rcx
+	xor rax, rax
+	ret
 arch_u_strlen_cont:
-    mov rax, 1
-    ret
+	mov rax, 1
+	ret
+
+global arch_u_memcpy
+global arch_u_memcpy_cont
+
+arch_u_memcpy:
+	mov rcx, rdx
+	rep movsb
+	xor rax, rax
+	ret
+	arch_u_memcpy_cont:
+	mov rax, 1
+	ret
+
+global arch_u_strcpy
+global arch_u_strcpy_cont
+
+arch_u_strcpy:
+	.loop:
+		mov al, [rsi]
+		mov [rdi], al
+		inc rsi
+		inc rdi
+		test al,al
+		jz .done
+		jmp .loop
+	.done:
+	xor rax,rax
+	ret
+	arch_u_strcpy_cont:
+	mov rax, 1
+	ret
+
diff --git a/src/include/kernel/ustring.h b/src/include/kernel/ustring.h
index 67098a1c..a427da62 100644
--- a/src/include/kernel/ustring.h
+++ b/src/include/kernel/ustring.h
@@ -3,7 +3,9 @@
 
 #include <stddef.h>
 
-int u_strlen(const char* str, size_t* size);
+int u_strlen(const char*, size_t*);
+int u_memcpy(void*, const void*, size_t);
+int u_strcpy(char*, const char*);
 
 
 #endif
diff --git a/src/sys/ustring.c b/src/sys/ustring.c
index 8505fa12..b28cf784 100644
--- a/src/sys/ustring.c
+++ b/src/sys/ustring.c
@@ -17,3 +17,32 @@ int u_strlen(const char* str, size_t* len){
 }
 
 
+extern void arch_u_memcpy_cont();
+extern int arch_u_memcpy(void* dest, const void* src, size_t len);
+
+int u_memcpy(void* dest, const void* src, size_t len){
+    
+	arch_getcls()->thread->umemopfailaddr = arch_u_memcpy_cont;
+
+	int ret = arch_u_memcpy(dest, src, len);
+
+	arch_getcls()->thread->umemopfailaddr = NULL;
+
+	return ret == 0 ? 0 : arch_getcls()->thread->umemoperror;
+    
+}
+
+extern void arch_u_strcpy_cont();
+extern int arch_u_strcpy(void* dest, const void* src);
+
+int u_strcpy(void* dest, const void* src){
+    
+	arch_getcls()->thread->umemopfailaddr = arch_u_strcpy_cont;
+
+	int ret = arch_u_strcpy(dest, src);
+
+	arch_getcls()->thread->umemopfailaddr = NULL;
+
+	return ret == 0 ? 0 : arch_getcls()->thread->umemoperror;
+    
+}