Kernel: Build MiniStdLib.cpp in aarch64 builds

Kernel/MiniStdLib.cpp

@@ -10,6 +10,7 @@ extern "C" {
 
 void* memcpy(void* dest_ptr, const void* src_ptr, size_t n)
 {
+#if ARCH(I386) || ARCH(X86_64)
     size_t dest = (size_t)dest_ptr;
     size_t src = (size_t)src_ptr;
     // FIXME: Support starting at an unaligned address.
@@ -35,6 +36,12 @@ void* memcpy(void* dest_ptr, const void* src_ptr, size_t n)
     asm volatile(
         "rep movsb\n" ::"S"(src), "D"(dest), "c"(n)
         : "memory");
+#else
+    u8* pd = (u8*)dest_ptr;
+    u8 const* ps = (u8 const*)src_ptr;
+    for (; n--;)
+        *pd++ = *ps++;
+#endif
     return dest_ptr;
 }
 
@@ -52,6 +59,7 @@ void* memmove(void* dest, const void* src, size_t n)
 
 void* memset(void* dest_ptr, int c, size_t n)
 {
+#if ARCH(I386) || ARCH(X86_64)
     size_t dest = (size_t)dest_ptr;
     // FIXME: Support starting at an unaligned address.
     if (!(dest & 0x3) && n >= 12) {
@@ -79,6 +87,11 @@ void* memset(void* dest_ptr, int c, size_t n)
         : "=D"(dest), "=c"(n)
         : "0"(dest), "1"(n), "a"(c)
         : "memory");
+#else
+    u8* pd = (u8*)dest_ptr;
+    for (; n--;)
+        *pd++ = c;
+#endif
     return dest_ptr;
 }
 

Kernel/Prekernel/CMakeLists.txt

@@ -1,5 +1,6 @@
 set(SOURCES
     UBSanitizer.cpp
+    ../MiniStdLib.cpp
 )
 if ("${SERENITY_ARCH}" STREQUAL "aarch64")
     set(SOURCES
@@ -14,7 +15,6 @@ else()
         Arch/x86/multiboot.S
         # FIXME: Eventually, some of these should build on aarch64 too.
         init.cpp
-        ../MiniStdLib.cpp
         ../../Userland/Libraries/LibELF/Relocation.cpp
     )
 endif()