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diff --git a/src/threads/start.S b/src/threads/start.S
index 5862479..df63f85 100644
--- a/src/threads/start.S
+++ b/src/threads/start.S
@@ -1,8 +1,12 @@
-# This module gets linked first, so that the kernel entry point
-# is the very beginning of its binary image.  All we need to do is
-# jump to the real entry point.
+#### The loader needs to have some way to know the kernel's entry
+#### point, that is, the address to which it should jump to start the
+#### kernel.  We handle this by writing the linker script kernel.lds.S
+#### so that this module appears at the very beginning of the kernel
+#### image, and then using that as the entry point.
 
 .globl start
+.section .start
+
 start:	call main
 
 	# If main returns, spin.