diff --git a/kernel/src/std/string.cpp b/kernel/src/std/string.cpp
index 79fe1d76..bcb3e62d 100644
--- a/kernel/src/std/string.cpp
+++ b/kernel/src/std/string.cpp
@@ -111,34 +111,32 @@ void* memcpy(void* dest, const void* src, size_t n)
     return dest;
 }
 
-void* memset(void* dest, int c, size_t n)
+void* memset(void* buf, int c, size_t n)
 {
-    for (size_t i = 0; i < n; ++i) { *((char*)dest + i) = (char)c; }
-    return dest;
+    for (size_t i = 0; i < n; ++i) { *((char*)buf + i) = (char)c; }
+    return buf;
 }
 
 int memcmp(const void* a, const void* b, size_t n)
 {
-    const char* _a = (const char*)a;
-    const char* _b = (const char*)b;
-    for (; n && _a == _b; n--, _a++, _b++)
-        ;
     if (!n) return 0;
-    if (*_a > *_b) return 1;
-    return -1;
+    const unsigned char* ap = (const unsigned char*)a;
+    const unsigned char* bp = (const unsigned char*)b;
+    while (--n && *ap == *bp)
+    {
+        ap++;
+        bp++;
+    }
+    return *ap - *bp;
 }
 
-void* memmove(void* dest, void* src, size_t n)
+void* memmove(void* dest, const void* src, size_t n)
 {
     if (dest == src) return dest;
     if (dest > src)
-    {
-        for (long i = n - 1; i >= 0; i++) { *((char*)dest + i) = *((char*)src + i); }
-    }
+        for (long i = n - 1; i >= 0; i++) { *((char*)dest + i) = *((const char*)src + i); }
     else
-    {
-        for (long i = 0; i < (long)n; i++) { *((char*)dest + i) = *((char*)src + i); }
-    }
+        for (long i = 0; i < (long)n; i++) { *((char*)dest + i) = *((const char*)src + i); }
     return dest;
 }