From 8fa312febd3cbb63e0d2a45044be614f062f9690 Mon Sep 17 00:00:00 2001
From: Ben Pfaff <blp@cs.stanford.edu>
Date: Wed, 27 Oct 2004 03:13:45 +0000
Subject: [PATCH] Clarifications.
---
doc/userprog.texi | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/doc/userprog.texi b/doc/userprog.texi
index 3293496..f70957f 100644
--- a/doc/userprog.texi
+++ b/doc/userprog.texi
@@ -520,7 +520,8 @@ isn't properly set up yet, this causes a page fault.
@samp{system call!}.}
Every reasonable program tries to make at least one system call
-(@func{exit}) and most programs make more than that. The default
+(@func{exit}) and most programs make more than that. Notably,
+@func{printf} invokes the @code{write} system call. The default
system call handler just prints @samp{system call!} and terminates the
program. You'll have to implement 2-2 before you see anything more
interesting. Until then, you can use @func{hex_dump} to convince
--
2.30.2