From: Ben Pfaff <blp@cs.stanford.edu>
Date: Fri, 21 Jan 2005 22:14:41 +0000 (+0000)
Subject: syscall-stub.S is gone; don't talk about it.
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c3db4f872fdc6ac50cd5bfde5117467b40bd54db;p=pintos-anon

syscall-stub.S is gone; don't talk about it.
---

diff --git a/doc/userprog.texi b/doc/userprog.texi
index a92697d..9db0737 100644
--- a/doc/userprog.texi
+++ b/doc/userprog.texi
@@ -516,9 +516,9 @@ recommend against modifying code in the @file{filesys} directory.}
 
 We have provided you a user-level function for each system call in
 @file{lib/user/syscall.c}.  These provide a way for user processes to
-invoke each system call from a C program.  Each of them calls an
-assembly language routine in @file{lib/user/syscall-stub.S}, which in
-turn invokes the system call interrupt and returns.
+invoke each system call from a C program.  Each uses a little inline
+assembly code to invoke the system call and (if appropriate) returns the
+system call's return value.
 
 When you're done with this part, and forevermore, Pintos should be
 bulletproof.  Nothing that a user program can do should ever cause the