Add a linker script

src/arch/x86_64/linker.ld

@@ -0,0 +1,16 @@
+ENTRY(start)
+
+SECTIONS {
+    . = 1M;
+
+    .boot :
+    {
+        /* ensure that the multiboot header is at the beginning */
+        *(.multiboot_header)
+    }
+
+    .text :
+    {
+        *(.text)
+    }
+}