Path: utzoo!utgpu!attcan!uunet!mcvax!unido!iraun1!iraul1!joachim
From: joachim@iraul1.ira.uka.de (Joachim Lindenberg)
Newsgroups: comp.sys.mac.programmer
Subject: Register saving conventions
Message-ID: <664@iraun1.ira.uka.de>
Date: 30 Jul 88 10:16:19 GMT
Sender: news@iraun1.ira.uka.de
Reply-To: joachim@iraul1.ira.uka.de (Joachim Lindenberg)
Organization: Karlsruhe University, West-Germany
Lines: 13

Apple,

while writing some small patches to toolbox traps, I noticed that
Multifinder doesn't conform to the register saving conventions stated
in Inside Macintosh. Some routines apparently assume, that registers
are not changed by the trap. The traps I patched are GetResource and
DrawMenuBar. Both of them work only if I save registers D0-D2/A0-A1.

I know that you did a great job implementing MultiFinder, but fixing
problems like that will ease the life of your developers.

Joachim Lindenberg, Dept. of Computer Science, University of Karlsruhe
Sommerstrasse 4, 7500 Karlsruhe 1, Federal Republic of Germany