From:	"John S. Fine" <johnfine AT erols DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: ASM - function: what should be pushed?
Date:	Sun, 31 Jan 1999 13:27:49 -0500
Lines:	20
Message-ID:	<36B4A0A5.585D@erols.com>
References:	<Pine DOT SUN DOT 3 DOT 91 DOT 990131103751 DOT 25086R-100000 AT is>
Mime-Version:	1.0
X-Trace:	cuEfDITY+aJWKKsjO/8xRG2syQelhd9JisDLFMTonzI=
X-Complaints-To:	abuse AT rcn DOT com
NNTP-Posting-Date:	31 Jan 1999 18:29:03 GMT
X-Mailer:	Mozilla 3.01 (Win95; U)
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
Reply-To:	djgpp AT delorie DOT com

Eli Zaretskii wrote:

> Is anything wrong with section 17.4?

  DS, ES, FS, GS ??

  I would also mention EBP.  Never underestimate a programmer's
tendancy to jump in without the expected background knowledge.

  I am nearly certain that a routine called from C must
preserve DS, and ES.  I *think* it may clobber FS and GS.

  It is probably to obvious to deserve mention, but it
must preserve CS and SS as well and must follow normal
subroutine return conventions regarding ESP and EIP.
You might even mention the direction bit in EFLAGS (It
can be clobbered, right?).
-- 
http://www.erols.com/johnfine/
http://www.geocities.com/SiliconValley/Peaks/8600/

- Raw text -