Mercurial > hg-old > index.cgi

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
<HTML
><HEAD
><TITLE
>OS9 Modules</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
REL="HOME"
TITLE="LW Tool Chain"
HREF="index.html"><LINK
REL="UP"
TITLE="Output Formats"
HREF="c18.html"><LINK
REL="PREVIOUS"
TITLE="DECB Binaries"
HREF="x24.html"><LINK
REL="NEXT"
TITLE="Object Files"
HREF="x35.html"></HEAD
><BODY
CLASS="SECTION"
BGCOLOR="#FFFFFF"
TEXT="#000000"
LINK="#0000FF"
VLINK="#840084"
ALINK="#0000FF"
><DIV
CLASS="NAVHEADER"
><TABLE
SUMMARY="Header navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TH
COLSPAN="3"
ALIGN="center"
>LW Tool Chain</TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="bottom"
><A
HREF="x24.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="80%"
ALIGN="center"
VALIGN="bottom"
>Chapter 2. Output Formats</TD
><TD
WIDTH="10%"
ALIGN="right"
VALIGN="bottom"
><A
HREF="x35.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><DIV
CLASS="SECTION"
><H1
CLASS="SECTION"
><A
NAME="AEN29"
>2.3. OS9 Modules</A
></H1
><P
>&#13;Since version 2.5, LWASM is able to generate OS9 modules. The syntax is
basically the same as for other assemblers.  A module starts with the MOD
directive and ends with the EMOD directive.  The OS9 directive is provided
as a shortcut for writing system calls.&#13;</P
><P
>&#13;LWASM does NOT provide an OS9Defs file. You must provide your own. Also note
that the common practice of using "ifp1" around the inclusion of the OS9Defs
file is discouraged as it is pointless and can lead to unintentional
problems and phasing errors.  Because LWASM reads each file exactly once,
there is no benefit to restricting the inclusion to the first assembly pass.&#13;</P
><P
>&#13;It is also critical to understand that unlike many OS9 assemblers, LWASM
does NOT maintain a separate data address counter.  Thus, you must define
all your data offsets and so on outside of the mod/emod segment.  It is,
therefore, likely that source code targeted at other assemblers will require
edits to build correctly.&#13;</P
><P
>&#13;LWLINK does not, yet, have the ability to create OS9 modules from object
files.&#13;</P
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"><TABLE
SUMMARY="Footer navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><A
HREF="x24.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="index.html"
ACCESSKEY="H"
>Home</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><A
HREF="x35.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
>DECB Binaries</TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="c18.html"
ACCESSKEY="U"
>Up</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
>Object Files</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>
author	lost@l-w.ca
date	Fri, 05 Nov 2010 22:27:00 -0600
parents	b8bf63962a99
children