<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>MIPS Example</title><meta name="generator" content="DocBook XSL Stylesheets V1.76.1"><meta name="keywords" content="assembly, assembler, asm, inline, 32-bit, IA-32, i386, x86, nasm, gas, as, as86, yasm, fasm, shasm, osimpa, OS, Linux, Unix, kernel, system, libc, glibc, system call, interrupt, small, fast, embedded, hardware, port, macroprocessor, metaprogramming, preprocessor"><link rel="home" href="Assembly-HOWTO.html" title="Linux Assembly HOWTO"><link rel="up" href="quickstart.html" title="Chapter 6. Quick start"><link rel="prev" href="build.html" title="Building an executable"><link rel="next" href="resources.html" title="Chapter 7. Resources"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">MIPS Example</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="build.html">Prev</a> </td><th width="60%" align="center">Chapter 6. Quick start</th><td width="20%" align="right"> <a accesskey="n" href="resources.html">Next</a></td></tr></table><hr></div><div class="section" title="MIPS Example"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp479632"></a>MIPS Example</h2></div></div></div>
<p>
As a demonstration of a fact that there's a universe other than x86,
here comes an example program for MIPS by Spencer Parkin.
BTW, if you've got here, you may also want to see
<a class="ulink" href="http://www.cuillin.demon.co.uk/nazz/trivia/hw/hw_assembler.html" target="_top">
A Collection of Assembler Hello World Programs
</a>.
</p>
<p>
</p><pre class="programlisting">
# hello.S by Spencer T. Parkin
# This is my first MIPS-RISC assembly program!
# To compile this program type:
# > gcc -o hello hello.S -non_shared
# This program compiles without errors or warnings
# on a PlayStation2 MIPS R5900 (EE Core).
# EE stands for Emotion Engine...lame!
# The -non_shared option tells gcc that we`re
# not interrested in compiling relocatable code.
# If we were, we would need to follow the PIC-
# ABI calling conventions and other protocols.
#include <asm/regdef.h> // ...for human readable register names
#include <asm/unistd.h> // ...for system serivices
.rdata # begin read-only data segment
.align 2 # because of the way memory is built
hello: .asciz "Hello, world!\n" # a null terminated string
.align 4 # because of the way memory is built
length: .word . - hello # length = IC - (hello-addr)
.text # begin code segment
.globl main # for gcc/ld linking
.ent main # for gdb debugging info.
main: # We must specify -non_shared to gcc or we`ll need these 3 lines that fallow.
# .set noreorder # disable instruction reordering
# .cpload t9 # PIC ABI crap (function prologue)
# .set reorder # re-enable instruction reordering
move a0,$0 # load stdout fd
la a1,hello # load string address
lw a2,length # load string length
li v0,__NR_write # specify system write service
syscall # call the kernel (write string)
li v0,0 # load return code
j ra # return to caller
.end main # for dgb debugging info.
# That`s all folks!
</pre><p>
</p>
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