From 5d6783a9bc4faf3e826b223c8e34d5583325133c Mon Sep 17 00:00:00 2001
From: cnlohr <lohr85@gmail.com>
Date: Tue, 14 Mar 2023 07:35:53 -0400
Subject: [PATCH] Add note about the nop in the self-modifying code

---
 examples/self_modify_code/self_modify_code.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/examples/self_modify_code/self_modify_code.c b/examples/self_modify_code/self_modify_code.c
index 40f0940..bad54d8 100644
--- a/examples/self_modify_code/self_modify_code.c
+++ b/examples/self_modify_code/self_modify_code.c
@@ -22,6 +22,7 @@ uint32_t ReadCSRSelfModify( uint16_t whichcsr )
 	// instructions in this way.  Otherwise, the compiler will try
 	// to optimize the code and inline the assembly int something where
 	// our global handle into assembly code becomes meaningless.
+	// Annoyingly, it has to contain at least one instruction :(
 	asm volatile( "nop" );
 
 	// 000026f3 is csrrs a3, 0x000, x0; So, we modify it, placing the
-- 
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