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<title>Mu - subx/examples/ex1.subx</title>
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<a href='https://github.com/akkartik/mu/blob/master/subx/examples/ex1.subx'>https://github.com/akkartik/mu/blob/master/subx/examples/ex1.subx</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="subxComment"># First program: same as <a href="https://www.muppetlabs.com/~breadbox/software/tiny/teensy.html">https://www.muppetlabs.com/~breadbox/software/tiny/teensy.html</a></span>
<span id="L2" class="LineNr"> 2 </span><span class="subxComment"># Just return 42.</span>
<span id="L3" class="LineNr"> 3 </span><span class="subxComment">#</span>
<span id="L4" class="LineNr"> 4 </span><span class="subxComment"># To run (from the subx directory):</span>
<span id="L5" class="LineNr"> 5 </span><span class="subxComment"># $ ./subx translate examples/ex1.2.subx -o examples/ex1</span>
<span id="L6" class="LineNr"> 6 </span><span class="subxComment"># $ ./subx run examples/ex1</span>
<span id="L7" class="LineNr"> 7 </span><span class="subxComment"># Expected result:</span>
<span id="L8" class="LineNr"> 8 </span><span class="subxComment"># $ echo $?</span>
<span id="L9" class="LineNr"> 9 </span><span class="subxComment"># 42</span>
<span id="L10" class="LineNr">10 </span>
<span id="L11" class="LineNr">11 </span>== code
<span id="L12" class="LineNr">12 </span>
<span id="L13" class="LineNr">13 </span><span class="subxComment"># syscall(exit, 42)</span>
<span id="L14" class="LineNr">14 </span>bb/copy-to-EBX 2a/imm32 <span class="subxComment"># 42 in hex</span>
<span id="L15" class="LineNr">15 </span>b8/copy-to-EAX 1/imm32/exit
<span id="L16" class="LineNr">16 </span>cd/syscall 0x80/imm8
<span id="L17" class="LineNr">17 </span>
<span id="L18" class="LineNr">18 </span><span class="subxS2Comment"># . . vim:nowrap:textwidth=0</span>
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