<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML ><HEAD ><TITLE >NASM</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REL="HOME" TITLE="Linux Assembly HOWTO" HREF="index.html"><LINK REL="UP" TITLE="Assemblers" HREF="assemblers.html"><LINK REL="PREVIOUS" TITLE="GAS" HREF="gas.html"><LINK REL="NEXT" TITLE="Other Assemblers" HREF="other.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" >Linux Assembly HOWTO</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="gas.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" >Chapter 3. Assemblers</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="other.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECTION" ><H1 CLASS="SECTION" ><A NAME="P-NASM" ></A >3.3. NASM</H1 ><P >The Netwide Assembler project provides cool i386 assembler, written in C, that should be modular enough to eventually support all known syntaxes and object formats.</P ><DIV CLASS="SECTION" ><H2 CLASS="SECTION" ><A NAME="P-NASM-WHERE" ></A >3.3.1. Where to find NASM</H2 ><P ><A HREF="http://nasm.sourceforge.net" TARGET="_top" >http://nasm.sourceforge.net</A >, <A HREF="http://sourceforge.net/projects/nasm/" TARGET="_top" >http://sourceforge.net/projects/nasm/</A > </P ><P >Binary release on your usual metalab mirror in <TT CLASS="FILENAME" >devel/lang/asm/</TT > directory. Should also be available as <TT CLASS="FILENAME" >.rpm</TT > or <TT CLASS="FILENAME" >.deb</TT > in your usual Linux distribution.</P ></DIV ><DIV CLASS="SECTION" ><H2 CLASS="SECTION" ><A NAME="AEN436" ></A >3.3.2. What it does</H2 ><P >The syntax is Intel-style. Comprehensive macroprocessing support is integrated.</P ><P >Supported object file formats are <TT CLASS="LITERAL" >bin</TT >, <TT CLASS="LITERAL" >aout</TT >, <TT CLASS="LITERAL" >coff</TT >, <TT CLASS="LITERAL" >elf</TT >, <TT CLASS="LITERAL" >as86</TT >, <TT CLASS="LITERAL" >obj</TT > (DOS), <TT CLASS="LITERAL" >win32</TT >, <TT CLASS="LITERAL" >rdf</TT > (their own format).</P ><P >NASM can be used as a backend for the free LCC compiler (support files included).</P ><P >Unless you're using BCC as a 16-bit compiler (which is out of scope of this 32-bit HOWTO), you should definitely use NASM instead of say AS86 or MASM, because it runs on all platforms.</P ><DIV CLASS="NOTE" ><P ></P ><TABLE CLASS="NOTE" WIDTH="100%" BORDER="0" ><TR ><TD WIDTH="25" ALIGN="CENTER" VALIGN="TOP" ><IMG SRC="../images/note.gif" HSPACE="5" ALT="Note"></TD ><TD ALIGN="LEFT" VALIGN="TOP" ><P >NASM comes with a disassembler, NDISASM.</P ></TD ></TR ></TABLE ></DIV ><P >Its hand-written parser makes it much faster than GAS, though of course, it doesn't support three bazillion different architectures. If you like Intel-style syntax, as opposed to GAS syntax, then it should be the assembler of choice...</P ><P >Note: There are <A HREF="resources.html" >few programs</A > which may help you to convert source code between AT&T and Intel assembler syntaxes; some of the are capable of performing conversion in both directions.</P ></DIV ></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="gas.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="other.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >GAS</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="assemblers.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Other Assemblers</TD ></TR ></TABLE ></DIV ></BODY ></HTML >
