Fix aarch64 build

arch/aarch64.c

@@ -1,4 +1,5 @@
 #if defined(__aarch64__)
+#include <stdint.h>
 
 void exit(int8_t status){
   asm ( "mov x0, %0\n"        // Move the exit status into register x0
@@ -19,7 +20,7 @@ intptr_t write(int32_t fd, const void* buf, intptr_t size){
     "mov x8, #64\n"
     "svc #0\n"
     : //TODO: n_written
-    : "r" (buf), "r"(count), "r"(fd)
+    : "r" (buf), "r"(size), "r"(fd)
     : "x0", "x8"           // Clobbered registers
   );
   return n_written;