nothing works but time to update

linker.ld

@@ -0,0 +1,22 @@
+ENTRY(_start)
+OUTPUT_FORMAT("binary")
+
+SECTIONS
+{
+    /* Start at the BIOS boot address */
+    . = 0x7c00;
+
+    .text : {
+        boot.o(.text)    /* Ensure bootloader is at the very beginning */
+        *(.text)         /* Compiled C code follows */
+        *(.rodata)       /* REQUIRED: Text strings live here */
+    }
+
+    .data : { *(.data) }
+    .bss  : { *(.bss)  }
+
+    /* Place the 0xAA55 signature exactly at the end of the first 512 bytes */
+    .sig : AT(0x7dfe) {
+        SHORT(0xaa55);
+    }
+}