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| author | Kartik Agaram <vc@akkartik.com> | 2018-09-23 22:38:16 -0700 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2018-09-23 22:38:16 -0700 |
| commit | 37d53a70958bfe5b1d7946229af9c12f0b865abc (patch) | |
| tree | af209b4fed1411344ad5aa6ead0e168c718b54b5 /html/subx/examples/ex11.subx.html | |
| parent | 76cb753a49974f6bb5a836a52445adf97de4a7cc (diff) | |
| download | mu-37d53a70958bfe5b1d7946229af9c12f0b865abc.tar.gz | |
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| -rw-r--r-- | html/subx/examples/ex11.subx.html | 364 |
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diff --git a/html/subx/examples/ex11.subx.html b/html/subx/examples/ex11.subx.html new file mode 100644 index 00000000..f0fd07c2 --- /dev/null +++ b/html/subx/examples/ex11.subx.html @@ -0,0 +1,364 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> +<html> +<head> +<meta http-equiv="content-type" content="text/html; charset=UTF-8"> +<title>Mu - subx/examples/ex11.subx</title> +<meta name="Generator" content="Vim/8.0"> +<meta name="plugin-version" content="vim7.4_v2"> +<meta name="syntax" content="none"> +<meta name="settings" content="number_lines,use_css,no_foldcolumn,expand_tabs,line_ids,prevent_copy="> +<meta name="colorscheme" content="minimal"> +<style type="text/css"> +<!-- +pre { font-family: monospace; color: #aaaaaa; background-color: #080808; } +body { font-size: 12pt; font-family: monospace; color: #aaaaaa; background-color: #080808; } +a { color:#eeeeee; text-decoration: none; } +a:hover { text-decoration: underline; } +* { font-size: 12pt; font-size: 1em; } +.LineNr { color: #444444; } +.Delimiter { color: #800080; } +.Comment { color: #9090ff; } +.Comment a { color:#0000ee; text-decoration:underline; } +.SalientComment { color: #00ffff; } +--> +</style> + +<script type='text/javascript'> +<!-- + +/* function to open any folds containing a jumped-to line before jumping to it */ +function JumpToLine() +{ + var lineNum; + lineNum = window.location.hash; + lineNum = lineNum.substr(1); /* strip off '#' */ + + if (lineNum.indexOf('L') == -1) { + lineNum = 'L'+lineNum; + } + lineElem = document.getElementById(lineNum); + /* Always jump to new location even if the line was hidden inside a fold, or + * we corrected the raw number to a line ID. + */ + if (lineElem) { + lineElem.scrollIntoView(true); + } + return true; +} +if ('onhashchange' in window) { + window.onhashchange = JumpToLine; +} + +--> +</script> +</head> +<body onload='JumpToLine();'> +<pre id='vimCodeElement'> +<span id="L1" class="LineNr"> 1 </span><span class="SalientComment">## Null-terminated vs length-prefixed ascii strings.</span> +<span id="L2" class="LineNr"> 2 </span><span class="Comment">#</span> +<span id="L3" class="LineNr"> 3 </span><span class="Comment"># By default we create strings with a 4-byte length prefix rather than a null suffix.</span> +<span id="L4" class="LineNr"> 4 </span><span class="Comment"># However, commandline arguments come null-prefixed from the Linux kernel.</span> +<span id="L5" class="LineNr"> 5 </span><span class="Comment"># This example shows a helper that can compare a commandline argument with the</span> +<span id="L6" class="LineNr"> 6 </span><span class="Comment"># (length-prefixed) literal string "target".</span> +<span id="L7" class="LineNr"> 7 </span><span class="Comment">#</span> +<span id="L8" class="LineNr"> 8 </span><span class="Comment"># To run:</span> +<span id="L9" class="LineNr"> 9 </span><span class="Comment"># $ subx translate ex11.subx ex11</span> +<span id="L10" class="LineNr"> 10 </span><span class="Comment"># $ subx run ex11 # runs a series of tests</span> +<span id="L11" class="LineNr"> 11 </span><span class="Comment"># ...... # all tests pass</span> +<span id="L12" class="LineNr"> 12 </span><span class="Comment">#</span> +<span id="L13" class="LineNr"> 13 </span><span class="Comment"># (We can't yet run the tests when given a "test" commandline argument,</span> +<span id="L14" class="LineNr"> 14 </span><span class="Comment"># because checking for it would require the function being tested! Breakage</span> +<span id="L15" class="LineNr"> 15 </span><span class="Comment"># would cause tests to not run, rather than to fail as we'd like.)</span> +<span id="L16" class="LineNr"> 16 </span> +<span id="L17" class="LineNr"> 17 </span>== code +<span id="L18" class="LineNr"> 18 </span><span class="Comment"># instruction effective address operand displacement immediate</span> +<span id="L19" class="LineNr"> 19 </span><span class="Comment"># op subop mod rm32 base index scale r32</span> +<span id="L20" class="LineNr"> 20 </span><span class="Comment"># 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes</span> +<span id="L21" class="LineNr"> 21 </span> +<span id="L22" class="LineNr"> 22 </span><span class="Comment"># main:</span> +<span id="L23" class="LineNr"> 23 </span> e8/call run_tests/disp32 <span class="Comment"># 'run_tests' is a function created automatically by SubX. It calls all functions that start with 'test_'.</span> +<span id="L24" class="LineNr"> 24 </span> <span class="Comment"># exit(EAX)</span> +<span id="L25" class="LineNr"> 25 </span> 89/copy 3/mod/direct 3/rm32/EBX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0/r32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy EAX to EBX</span> +<span id="L26" class="LineNr"> 26 </span> b8/copy <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 1/imm32 <span class="Comment"># copy 1 to EAX</span> +<span id="L27" class="LineNr"> 27 </span> cd/syscall 0x80/imm8 +<span id="L28" class="LineNr"> 28 </span> +<span id="L29" class="LineNr"> 29 </span><span class="Comment"># compare a null-terminated ascii string with a more idiomatic length-prefixed byte array</span> +<span id="L30" class="LineNr"> 30 </span><span class="Comment"># reason for the name: the only place we should have null-terminated ascii strings is from commandline args</span> +<span id="L31" class="LineNr"> 31 </span>argv_equal: <span class="Comment"># s : null-terminated ascii string, benchmark : length-prefixed ascii string -> EAX : boolean</span> +<span id="L32" class="LineNr"> 32 </span> <span class="Comment"># pseudocode:</span> +<span id="L33" class="LineNr"> 33 </span> <span class="Comment"># initialize n = b.length</span> +<span id="L34" class="LineNr"> 34 </span> <span class="Comment"># initialize s1 = s</span> +<span id="L35" class="LineNr"> 35 </span> <span class="Comment"># initialize s2 = b.data</span> +<span id="L36" class="LineNr"> 36 </span> <span class="Comment"># i = 0</span> +<span id="L37" class="LineNr"> 37 </span> <span class="Comment"># for (i = 0; i < n; ++n)</span> +<span id="L38" class="LineNr"> 38 </span> <span class="Comment"># c1 = *s1</span> +<span id="L39" class="LineNr"> 39 </span> <span class="Comment"># c2 = *s2</span> +<span id="L40" class="LineNr"> 40 </span> <span class="Comment"># if c1 == 0</span> +<span id="L41" class="LineNr"> 41 </span> <span class="Comment"># return false</span> +<span id="L42" class="LineNr"> 42 </span> <span class="Comment"># if c1 != c2</span> +<span id="L43" class="LineNr"> 43 </span> <span class="Comment"># return false</span> +<span id="L44" class="LineNr"> 44 </span> <span class="Comment"># return *s1 == 0</span> +<span id="L45" class="LineNr"> 45 </span> +<span id="L46" class="LineNr"> 46 </span> <span class="Comment"># initialize s into EDI</span> +<span id="L47" class="LineNr"> 47 </span> 8b/copy 1/mod/*+disp8 4/rm32/sib 4/base/ESP 4/index/none <span class="Delimiter"> . </span> 7/r32/EDI 8/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy *(ESP+8) to EDI</span> +<span id="L48" class="LineNr"> 48 </span> <span class="Comment"># initialize benchmark length n into EDX</span> +<span id="L49" class="LineNr"> 49 </span> 8b/copy 1/mod/*+disp8 4/rm32/sib 4/base/ESP 4/index/none <span class="Delimiter"> . </span> 2/r32/EDX 4/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy *(ESP+4) to EDX</span> +<span id="L50" class="LineNr"> 50 </span> 8b/copy 0/mod/indirect 2/rm32/EDX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 2/r32/EDX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy *EDX to EDX</span> +<span id="L51" class="LineNr"> 51 </span> <span class="Comment"># initialize benchmark data into ESI</span> +<span id="L52" class="LineNr"> 52 </span> 8b/copy 1/mod/*+disp8 4/rm32/sib 4/base/ESP 4/index/none <span class="Delimiter"> . </span> 6/r32/ESI 4/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy *(ESP+4) to ESI</span> +<span id="L53" class="LineNr"> 53 </span> 81 0/subop/add 3/mod/direct 6/rm32/ESI <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 4/imm32 <span class="Comment"># add 4 to ESI</span> +<span id="L54" class="LineNr"> 54 </span> <span class="Comment"># initialize loop counter i into ECX</span> +<span id="L55" class="LineNr"> 55 </span> b9/copy <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0/imm32/exit <span class="Comment"># copy 1 to ECX</span> +<span id="L56" class="LineNr"> 56 </span> <span class="Comment"># while (i/ECX < n/EDX)</span> +<span id="L57" class="LineNr"> 57 </span>$argv_loop: +<span id="L58" class="LineNr"> 58 </span> 39/compare 3/mod/direct 1/rm32/ECX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 2/r32/EDX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># compare ECX with EDX</span> +<span id="L59" class="LineNr"> 59 </span> 74/jump-if-equal $argv_break/disp8 +<span id="L60" class="LineNr"> 60 </span> <span class="Comment"># c1/EAX, c2/EBX = *s, *benchmark</span> +<span id="L61" class="LineNr"> 61 </span> b8/copy 0/imm32 <span class="Comment"># clear EAX</span> +<span id="L62" class="LineNr"> 62 </span> 8a/copy 0/mod/indirect 7/rm32/EDI <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0/r32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy byte at *EDI to lower byte of EAX</span> +<span id="L63" class="LineNr"> 63 </span> bb/copy 0/imm32 <span class="Comment"># clear EBX</span> +<span id="L64" class="LineNr"> 64 </span> 8a/copy 0/mod/indirect 6/rm32/ESI <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 3/r32/EBX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy byte at *ESI to lower byte of EBX</span> +<span id="L65" class="LineNr"> 65 </span> <span class="Comment"># if (c1 == 0) return false</span> +<span id="L66" class="LineNr"> 66 </span> 3d/compare <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0/imm32 <span class="Comment"># compare EAX with 0</span> +<span id="L67" class="LineNr"> 67 </span> 74/jump-if-equal $argv_fail/disp8 +<span id="L68" class="LineNr"> 68 </span> <span class="Comment"># if (c1 != c2) return false</span> +<span id="L69" class="LineNr"> 69 </span> 39/compare 3/mod/direct 0/rm32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 3/r32/EBX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># compare EAX with EBX</span> +<span id="L70" class="LineNr"> 70 </span> 75/jump-if-not-equal $argv_fail/disp8 +<span id="L71" class="LineNr"> 71 </span> <span class="Comment"># ++s1, ++s2, ++i</span> +<span id="L72" class="LineNr"> 72 </span> 41/inc-ECX +<span id="L73" class="LineNr"> 73 </span> 46/inc-ESI +<span id="L74" class="LineNr"> 74 </span> 47/inc-EDI +<span id="L75" class="LineNr"> 75 </span> <span class="Comment"># end while</span> +<span id="L76" class="LineNr"> 76 </span> eb/jump $argv_loop/disp8 +<span id="L77" class="LineNr"> 77 </span>$argv_break: +<span id="L78" class="LineNr"> 78 </span> <span class="Comment"># if (*s/EDI == 0) return true</span> +<span id="L79" class="LineNr"> 79 </span> b8/copy 0/imm32 <span class="Comment"># clear EAX</span> +<span id="L80" class="LineNr"> 80 </span> 8a/copy 0/mod/indirect 7/rm32/EDI <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0/r32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy byte at *EDI to lower byte of EAX</span> +<span id="L81" class="LineNr"> 81 </span> 81 7/subop/compare 3/mod/direct 0/rm32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0/imm32 <span class="Comment"># compare EAX with 0</span> +<span id="L82" class="LineNr"> 82 </span> 75/jump-if-not-equal $argv_fail/disp8 +<span id="L83" class="LineNr"> 83 </span> b8/copy <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 1/imm32 <span class="Comment"># copy 1 to EAX</span> +<span id="L84" class="LineNr"> 84 </span> c3/return +<span id="L85" class="LineNr"> 85 </span> <span class="Comment"># return false</span> +<span id="L86" class="LineNr"> 86 </span>$argv_fail: +<span id="L87" class="LineNr"> 87 </span> b8/copy <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0/imm32 <span class="Comment"># copy 0 to EAX</span> +<span id="L88" class="LineNr"> 88 </span> c3/return +<span id="L89" class="LineNr"> 89 </span> +<span id="L90" class="LineNr"> 90 </span><span class="SalientComment">## tests</span> +<span id="L91" class="LineNr"> 91 </span> +<span id="L92" class="LineNr"> 92 </span>test_compare_null_argv_with_empty_array: +<span id="L93" class="LineNr"> 93 </span> <span class="Comment"># EAX = argv_equal(Null_argv, "")</span> +<span id="L94" class="LineNr"> 94 </span> <span class="Comment"># push args</span> +<span id="L95" class="LineNr"> 95 </span> 68/push Null_argv/imm32 +<span id="L96" class="LineNr"> 96 </span> 68/push ""/imm32 +<span id="L97" class="LineNr"> 97 </span> <span class="Comment"># call</span> +<span id="L98" class="LineNr"> 98 </span> e8/call argv_equal/disp32 +<span id="L99" class="LineNr"> 99 </span> <span class="Comment"># discard args</span> +<span id="L100" class="LineNr">100 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 8/imm32 <span class="Comment"># add 8 to ESP</span> +<span id="L101" class="LineNr">101 </span> <span class="Comment"># call check_ints_equal(EAX, 1)</span> +<span id="L102" class="LineNr">102 </span> 50/push-EAX +<span id="L103" class="LineNr">103 </span> 68/push 1/imm32/true +<span id="L104" class="LineNr">104 </span> 68/push "F - test_compare_null_argv_with_empty_array"/imm32 +<span id="L105" class="LineNr">105 </span> <span class="Comment"># call</span> +<span id="L106" class="LineNr">106 </span> e8/call check_ints_equal/disp32 +<span id="L107" class="LineNr">107 </span> <span class="Comment"># discard args</span> +<span id="L108" class="LineNr">108 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0xc/imm32 <span class="Comment"># add 12 to ESP</span> +<span id="L109" class="LineNr">109 </span> c3/return +<span id="L110" class="LineNr">110 </span> +<span id="L111" class="LineNr">111 </span>test_compare_null_argv_with_non_empty_array: +<span id="L112" class="LineNr">112 </span> <span class="Comment"># EAX = argv_equal(Null_argv, "Abc")</span> +<span id="L113" class="LineNr">113 </span> <span class="Comment"># push args</span> +<span id="L114" class="LineNr">114 </span> 68/push Null_argv/imm32 +<span id="L115" class="LineNr">115 </span> 68/push "Abc"/imm32 +<span id="L116" class="LineNr">116 </span> <span class="Comment"># call</span> +<span id="L117" class="LineNr">117 </span> e8/call argv_equal/disp32 +<span id="L118" class="LineNr">118 </span> <span class="Comment"># discard args</span> +<span id="L119" class="LineNr">119 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 8/imm32 <span class="Comment"># add 8 to ESP</span> +<span id="L120" class="LineNr">120 </span> <span class="Comment"># call check_ints_equal(EAX, 0)</span> +<span id="L121" class="LineNr">121 </span> 50/push-EAX +<span id="L122" class="LineNr">122 </span> 68/push 0/imm32/false +<span id="L123" class="LineNr">123 </span> 68/push "F - test_compare_null_argv_with_non_empty_array"/imm32 +<span id="L124" class="LineNr">124 </span> <span class="Comment"># call</span> +<span id="L125" class="LineNr">125 </span> e8/call check_ints_equal/disp32 +<span id="L126" class="LineNr">126 </span> <span class="Comment"># discard args</span> +<span id="L127" class="LineNr">127 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0xc/imm32 <span class="Comment"># add 12 to ESP</span> +<span id="L128" class="LineNr">128 </span> c3/return +<span id="L129" class="LineNr">129 </span> +<span id="L130" class="LineNr">130 </span>test_compare_argv_with_equal_array: +<span id="L131" class="LineNr">131 </span> <span class="Comment"># EAX = argv_equal(Abc_argv, "Abc")</span> +<span id="L132" class="LineNr">132 </span> <span class="Comment"># push args</span> +<span id="L133" class="LineNr">133 </span> 68/push Abc_argv/imm32 +<span id="L134" class="LineNr">134 </span> 68/push "Abc"/imm32 +<span id="L135" class="LineNr">135 </span> <span class="Comment"># call</span> +<span id="L136" class="LineNr">136 </span> e8/call argv_equal/disp32 +<span id="L137" class="LineNr">137 </span> <span class="Comment"># discard args</span> +<span id="L138" class="LineNr">138 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 8/imm32 <span class="Comment"># add 8 to ESP</span> +<span id="L139" class="LineNr">139 </span> <span class="Comment"># call check_ints_equal(EAX, 1)</span> +<span id="L140" class="LineNr">140 </span> 50/push-EAX +<span id="L141" class="LineNr">141 </span> 68/push 1/imm32/true +<span id="L142" class="LineNr">142 </span> 68/push "F - test_compare_argv_with_equal_array"/imm32 +<span id="L143" class="LineNr">143 </span> <span class="Comment"># call</span> +<span id="L144" class="LineNr">144 </span> e8/call check_ints_equal/disp32 +<span id="L145" class="LineNr">145 </span> <span class="Comment"># discard args</span> +<span id="L146" class="LineNr">146 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0xc/imm32 <span class="Comment"># add 12 to ESP</span> +<span id="L147" class="LineNr">147 </span> c3/return +<span id="L148" class="LineNr">148 </span> +<span id="L149" class="LineNr">149 </span>test_compare_argv_with_inequal_array: +<span id="L150" class="LineNr">150 </span> <span class="Comment"># EAX = argv_equal(Abc_argv, "Adc")</span> +<span id="L151" class="LineNr">151 </span> <span class="Comment"># push args</span> +<span id="L152" class="LineNr">152 </span> 68/push Abc_argv/imm32 +<span id="L153" class="LineNr">153 </span> 68/push "Adc"/imm32 +<span id="L154" class="LineNr">154 </span> <span class="Comment"># call</span> +<span id="L155" class="LineNr">155 </span> e8/call argv_equal/disp32 +<span id="L156" class="LineNr">156 </span> <span class="Comment"># discard args</span> +<span id="L157" class="LineNr">157 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 8/imm32 <span class="Comment"># add 8 to ESP</span> +<span id="L158" class="LineNr">158 </span> <span class="Comment"># call check_ints_equal(EAX, 0)</span> +<span id="L159" class="LineNr">159 </span> 50/push-EAX +<span id="L160" class="LineNr">160 </span> 68/push 0/imm32/false +<span id="L161" class="LineNr">161 </span> 68/push "F - test_compare_argv_with_equal_array"/imm32 +<span id="L162" class="LineNr">162 </span> <span class="Comment"># call</span> +<span id="L163" class="LineNr">163 </span> e8/call check_ints_equal/disp32 +<span id="L164" class="LineNr">164 </span> <span class="Comment"># discard args</span> +<span id="L165" class="LineNr">165 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0xc/imm32 <span class="Comment"># add 12 to ESP</span> +<span id="L166" class="LineNr">166 </span> c3/return +<span id="L167" class="LineNr">167 </span> +<span id="L168" class="LineNr">168 </span>test_compare_argv_with_empty_array: +<span id="L169" class="LineNr">169 </span> <span class="Comment"># EAX = argv_equal(Abc_argv, "")</span> +<span id="L170" class="LineNr">170 </span> <span class="Comment"># push args</span> +<span id="L171" class="LineNr">171 </span> 68/push Abc_argv/imm32 +<span id="L172" class="LineNr">172 </span> 68/push ""/imm32 +<span id="L173" class="LineNr">173 </span> <span class="Comment"># call</span> +<span id="L174" class="LineNr">174 </span> e8/call argv_equal/disp32 +<span id="L175" class="LineNr">175 </span> <span class="Comment"># discard args</span> +<span id="L176" class="LineNr">176 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 8/imm32 <span class="Comment"># add 8 to ESP</span> +<span id="L177" class="LineNr">177 </span> <span class="Comment"># call check_ints_equal(EAX, 0)</span> +<span id="L178" class="LineNr">178 </span> 50/push-EAX +<span id="L179" class="LineNr">179 </span> 68/push 0/imm32/false +<span id="L180" class="LineNr">180 </span> 68/push "F - test_compare_argv_with_equal_array"/imm32 +<span id="L181" class="LineNr">181 </span> <span class="Comment"># call</span> +<span id="L182" class="LineNr">182 </span> e8/call check_ints_equal/disp32 +<span id="L183" class="LineNr">183 </span> <span class="Comment"># discard args</span> +<span id="L184" class="LineNr">184 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0xc/imm32 <span class="Comment"># add 12 to ESP</span> +<span id="L185" class="LineNr">185 </span> c3/return +<span id="L186" class="LineNr">186 </span> +<span id="L187" class="LineNr">187 </span>test_compare_argv_with_shorter_array: +<span id="L188" class="LineNr">188 </span> <span class="Comment"># EAX = argv_equal(Abc_argv, "Ab")</span> +<span id="L189" class="LineNr">189 </span> <span class="Comment"># push args</span> +<span id="L190" class="LineNr">190 </span> 68/push Abc_argv/imm32 +<span id="L191" class="LineNr">191 </span> 68/push "Ab"/imm32 +<span id="L192" class="LineNr">192 </span> <span class="Comment"># call</span> +<span id="L193" class="LineNr">193 </span> e8/call argv_equal/disp32 +<span id="L194" class="LineNr">194 </span> <span class="Comment"># discard args</span> +<span id="L195" class="LineNr">195 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 8/imm32 <span class="Comment"># add 8 to ESP</span> +<span id="L196" class="LineNr">196 </span> <span class="Comment"># call check_ints_equal(EAX, 0)</span> +<span id="L197" class="LineNr">197 </span> 50/push-EAX +<span id="L198" class="LineNr">198 </span> 68/push 0/imm32/false +<span id="L199" class="LineNr">199 </span> 68/push "F - test_compare_argv_with_shorter_array"/imm32 +<span id="L200" class="LineNr">200 </span> <span class="Comment"># call</span> +<span id="L201" class="LineNr">201 </span> e8/call check_ints_equal/disp32 +<span id="L202" class="LineNr">202 </span> <span class="Comment"># discard args</span> +<span id="L203" class="LineNr">203 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0xc/imm32 <span class="Comment"># add 12 to ESP</span> +<span id="L204" class="LineNr">204 </span> c3/return +<span id="L205" class="LineNr">205 </span> +<span id="L206" class="LineNr">206 </span>test_compare_argv_with_longer_array: +<span id="L207" class="LineNr">207 </span> <span class="Comment"># EAX = argv_equal(Abc_argv, "Abcd")</span> +<span id="L208" class="LineNr">208 </span> <span class="Comment"># push args</span> +<span id="L209" class="LineNr">209 </span> 68/push Abc_argv/imm32 +<span id="L210" class="LineNr">210 </span> 68/push "Abcd"/imm32 +<span id="L211" class="LineNr">211 </span> <span class="Comment"># call</span> +<span id="L212" class="LineNr">212 </span> e8/call argv_equal/disp32 +<span id="L213" class="LineNr">213 </span> <span class="Comment"># discard args</span> +<span id="L214" class="LineNr">214 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 8/imm32 <span class="Comment"># add 8 to ESP</span> +<span id="L215" class="LineNr">215 </span> <span class="Comment"># call check_ints_equal(EAX, 0)</span> +<span id="L216" class="LineNr">216 </span> 50/push-EAX +<span id="L217" class="LineNr">217 </span> 68/push 0/imm32/false +<span id="L218" class="LineNr">218 </span> 68/push "F - test_compare_argv_with_longer_array"/imm32 +<span id="L219" class="LineNr">219 </span> <span class="Comment"># call</span> +<span id="L220" class="LineNr">220 </span> e8/call check_ints_equal/disp32 +<span id="L221" class="LineNr">221 </span> <span class="Comment"># discard args</span> +<span id="L222" class="LineNr">222 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0xc/imm32 <span class="Comment"># add 12 to ESP</span> +<span id="L223" class="LineNr">223 </span> c3/return +<span id="L224" class="LineNr">224 </span> +<span id="L225" class="LineNr">225 </span><span class="SalientComment">## helpers</span> +<span id="L226" class="LineNr">226 </span> +<span id="L227" class="LineNr">227 </span><span class="Comment"># print msg to stderr if a != b, otherwise print "."</span> +<span id="L228" class="LineNr">228 </span>check_ints_equal: <span class="Comment"># (a : int, b : int, msg : (address array byte)) -> boolean</span> +<span id="L229" class="LineNr">229 </span> <span class="Comment"># load args into EAX, EBX and ECX</span> +<span id="L230" class="LineNr">230 </span> 8b/copy 1/mod/*+disp8 4/rm32/sib 4/base/ESP 4/index/none <span class="Delimiter"> . </span> 0/r32/EAX 0xc/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy *(ESP+12) to EAX</span> +<span id="L231" class="LineNr">231 </span> 8b/copy 1/mod/*+disp8 4/rm32/sib 4/base/ESP 4/index/none <span class="Delimiter"> . </span> 3/r32/EBX 0x8/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy *(ESP+8) to EBX</span> +<span id="L232" class="LineNr">232 </span> <span class="Comment"># if EAX == b/EBX</span> +<span id="L233" class="LineNr">233 </span> 39/compare 3/mod/direct 0/rm32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 3/r32/EBX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># compare EAX and EBX</span> +<span id="L234" class="LineNr">234 </span> 75/jump-if-unequal $check_ints_equal:else/disp8 +<span id="L235" class="LineNr">235 </span> <span class="Comment"># print('.')</span> +<span id="L236" class="LineNr">236 </span> <span class="Comment"># push args</span> +<span id="L237" class="LineNr">237 </span> 68/push "."/imm32 +<span id="L238" class="LineNr">238 </span> <span class="Comment"># call</span> +<span id="L239" class="LineNr">239 </span> e8/call write_stderr/disp32 +<span id="L240" class="LineNr">240 </span> <span class="Comment"># discard arg</span> +<span id="L241" class="LineNr">241 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 4/imm32 <span class="Comment"># add 4 to ESP</span> +<span id="L242" class="LineNr">242 </span> <span class="Comment"># return</span> +<span id="L243" class="LineNr">243 </span> c3/return +<span id="L244" class="LineNr">244 </span> <span class="Comment"># else:</span> +<span id="L245" class="LineNr">245 </span>$check_ints_equal:else: +<span id="L246" class="LineNr">246 </span> <span class="Comment"># copy msg into ECX</span> +<span id="L247" class="LineNr">247 </span> 8b/copy 1/mod/*+disp8 4/rm32/sib 4/base/ESP 4/index/none <span class="Delimiter"> . </span> 1/r32/ECX 4/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy *(ESP+4) to ECX</span> +<span id="L248" class="LineNr">248 </span> <span class="Comment"># print(ECX)</span> +<span id="L249" class="LineNr">249 </span> <span class="Comment"># push args</span> +<span id="L250" class="LineNr">250 </span> 51/push-ECX +<span id="L251" class="LineNr">251 </span> <span class="Comment"># call</span> +<span id="L252" class="LineNr">252 </span> e8/call write_stderr/disp32 +<span id="L253" class="LineNr">253 </span> <span class="Comment"># discard arg</span> +<span id="L254" class="LineNr">254 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 4/imm32 <span class="Comment"># add 4 to ESP</span> +<span id="L255" class="LineNr">255 </span> <span class="Comment"># print newline</span> +<span id="L256" class="LineNr">256 </span> <span class="Comment"># push args</span> +<span id="L257" class="LineNr">257 </span> 68/push Newline/imm32 +<span id="L258" class="LineNr">258 </span> <span class="Comment"># call</span> +<span id="L259" class="LineNr">259 </span> e8/call write_stderr/disp32 +<span id="L260" class="LineNr">260 </span> <span class="Comment"># discard arg</span> +<span id="L261" class="LineNr">261 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 4/imm32 <span class="Comment"># add 4 to ESP</span> +<span id="L262" class="LineNr">262 </span> <span class="Comment"># end</span> +<span id="L263" class="LineNr">263 </span> c3/return +<span id="L264" class="LineNr">264 </span> +<span id="L265" class="LineNr">265 </span>write_stderr: <span class="Comment"># s : (address array byte) -> <void></span> +<span id="L266" class="LineNr">266 </span> <span class="Comment"># save registers</span> +<span id="L267" class="LineNr">267 </span> 50/push-EAX +<span id="L268" class="LineNr">268 </span> 51/push-ECX +<span id="L269" class="LineNr">269 </span> 52/push-EDX +<span id="L270" class="LineNr">270 </span> 53/push-EBX +<span id="L271" class="LineNr">271 </span> <span class="Comment"># write(2/stderr, (data) s+4, (size) *s)</span> +<span id="L272" class="LineNr">272 </span> <span class="Comment"># fd = 2 (stderr)</span> +<span id="L273" class="LineNr">273 </span> bb/copy <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 2/imm32 <span class="Comment"># copy 2 to EBX</span> +<span id="L274" class="LineNr">274 </span> <span class="Comment"># x = s+4</span> +<span id="L275" class="LineNr">275 </span> 8b/copy 1/mod/*+disp8 4/rm32/SIB 4/base/ESP 4/index/none <span class="Delimiter"> . </span> 1/r32/ECX 0x14/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy *(ESP+20) to ECX</span> +<span id="L276" class="LineNr">276 </span> 81 0/subop/add 3/mod/direct 1/rm32/ECX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 4/imm32 <span class="Comment"># add 4 to ECX</span> +<span id="L277" class="LineNr">277 </span> <span class="Comment"># size = *s</span> +<span id="L278" class="LineNr">278 </span> 8b/copy 1/mod/*+disp8 4/rm32/SIB 4/base/ESP 4/index/none <span class="Delimiter"> . </span> 2/r32/EDX 0x14/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy *(ESP+20) to EDX</span> +<span id="L279" class="LineNr">279 </span> 8b/copy 0/mod/indirect 2/rm32/EDX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 2/r32/EDX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy *EDX to EDX</span> +<span id="L280" class="LineNr">280 </span> <span class="Comment"># call write()</span> +<span id="L281" class="LineNr">281 </span> b8/copy <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 4/imm32/write <span class="Comment"># copy 1 to EAX</span> +<span id="L282" class="LineNr">282 </span> cd/syscall 0x80/imm8 +<span id="L283" class="LineNr">283 </span> <span class="Comment"># restore registers</span> +<span id="L284" class="LineNr">284 </span> 5b/pop-EBX +<span id="L285" class="LineNr">285 </span> 5a/pop-EDX +<span id="L286" class="LineNr">286 </span> 59/pop-ECX +<span id="L287" class="LineNr">287 </span> 58/pop-EAX +<span id="L288" class="LineNr">288 </span> <span class="Comment"># end</span> +<span id="L289" class="LineNr">289 </span> c3/return +<span id="L290" class="LineNr">290 </span> +<span id="L291" class="LineNr">291 </span>== data +<span id="L292" class="LineNr">292 </span>Newline: +<span id="L293" class="LineNr">293 </span> <span class="Comment"># size</span> +<span id="L294" class="LineNr">294 </span> 01 00 00 00 +<span id="L295" class="LineNr">295 </span> <span class="Comment"># data</span> +<span id="L296" class="LineNr">296 </span> 0a/newline +<span id="L297" class="LineNr">297 </span> +<span id="L298" class="LineNr">298 </span><span class="Comment"># for argv_equal tests</span> +<span id="L299" class="LineNr">299 </span>Null_argv: +<span id="L300" class="LineNr">300 </span> 00/null +<span id="L301" class="LineNr">301 </span>Abc_argv: +<span id="L302" class="LineNr">302 </span> 41/A 62/b 63/c 00/null +<span id="L303" class="LineNr">303 </span> +<span id="L304" class="LineNr">304 </span><span class="Comment"># vim:ft=subx:nowrap:so=0</span> +</pre> +</body> +</html> +<!-- vim: set foldmethod=manual : --> |