link in the prelude object

boot1/link.ld

@@ -1,10 +1,34 @@
 OUTPUT_FORMAT("binary")
-. = 0x9000;
+
+. = 0x8200;
+
 SECTIONS {
-  .text : { *(.text); *(.text.*) }
-  .data : { *(.data); *(.data.*) }
-  .bss : { *(.bss); *(.bss.*) }
-  .rodata : { *(.rodata); *(.rodata.*) }
+  .prelude : {
+    *(.prelude)
+  }
+  
+  .text : {
+    *(.text)
+    *(.text.*)
+  }
+  
+  .data : {
+    *(.data)
+    *(.data.*)
+  }
+  
+  .bss : {
+    *(.bss)
+    *(.bss.*)
+  }
+  
+  .rodata : {
+    *(.rodata)
+    *(.rodata.*)
+  }
+  
+  /* Define a symbol for the total length of the binary, so the prelude knows how many blocks to
+   * load from disk.
+   */
+  boot1_bin_len = . - 0x8200;
 }
-
-