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diff --git a/html/subx/056write.subx.html b/html/subx/056write.subx.html new file mode 100644 index 00000000..89d8859b --- /dev/null +++ b/html/subx/056write.subx.html @@ -0,0 +1,311 @@ +<!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/056write.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,pre_wrap,no_foldcolumn,expand_tabs,line_ids,prevent_copy="> +<meta name="colorscheme" content="minimal"> +<style type="text/css"> +<!-- +pre { white-space: pre-wrap; 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; } +.CommentedCode { color: #6c6c6c; } +.LineNr { color: #444444; } +.Delimiter { color: #800080; } +.Comment { color: #9090ff; } +.Comment a { color:#0000ee; text-decoration:underline; } +--> +</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="Comment"># write: like _write, but also support in-memory output streams (`ostream`s)</span> +<span id="L2" class="LineNr"> 2 </span><span class="Comment"># in addition to file descriptors.</span> +<span id="L3" class="LineNr"> 3 </span><span class="Comment">#</span> +<span id="L4" class="LineNr"> 4 </span><span class="Comment"># Our first dependency-injected and testable primitive. We can pass it either</span> +<span id="L5" class="LineNr"> 5 </span><span class="Comment"># a file descriptor or an address to an output stream or ostream. If a file</span> +<span id="L6" class="LineNr"> 6 </span><span class="Comment"># descriptor is passed in, we _write to it using the right syscall. If a 'fake</span> +<span id="L7" class="LineNr"> 7 </span><span class="Comment"># file descriptor' or ostream is passed in, we append to the output stream.</span> +<span id="L8" class="LineNr"> 8 </span><span class="Comment"># This lets us redirect output in tests and check it later.</span> +<span id="L9" class="LineNr"> 9 </span><span class="Comment">#</span> +<span id="L10" class="LineNr"> 10 </span><span class="Comment"># We assume our data segment will never begin at an address shorter than</span> +<span id="L11" class="LineNr"> 11 </span><span class="Comment"># 0x08000000, so any smaller arguments are assumed to be real file descriptors.</span> +<span id="L12" class="LineNr"> 12 </span><span class="Comment">#</span> +<span id="L13" class="LineNr"> 13 </span><span class="Comment"># An ostream looks like this:</span> +<span id="L14" class="LineNr"> 14 </span><span class="Comment"># write: int # index at which writes go</span> +<span id="L15" class="LineNr"> 15 </span><span class="Comment"># data: (array byte) # prefixed by length as usual</span> +<span id="L16" class="LineNr"> 16 </span> +<span id="L17" class="LineNr"> 17 </span>== data +<span id="L18" class="LineNr"> 18 </span> +<span id="L19" class="LineNr"> 19 </span><span class="Comment"># In-memory ostream for tests to write() to.</span> +<span id="L20" class="LineNr"> 20 </span><span class="Comment"># Also illustrates the layout of ostreams.</span> +<span id="L21" class="LineNr"> 21 </span>Test-ostream: +<span id="L22" class="LineNr"> 22 </span> <span class="Comment"># current write index</span> +<span id="L23" class="LineNr"> 23 </span> 00 00 00 00 +<span id="L24" class="LineNr"> 24 </span> <span class="Comment"># length (= 8)</span> +<span id="L25" class="LineNr"> 25 </span> 08 00 00 00 +<span id="L26" class="LineNr"> 26 </span> <span class="Comment"># data</span> +<span id="L27" class="LineNr"> 27 </span> 00 00 00 00 00 00 00 00 <span class="Comment"># 8 bytes</span> +<span id="L28" class="LineNr"> 28 </span> +<span id="L29" class="LineNr"> 29 </span>== code +<span id="L30" class="LineNr"> 30 </span> +<span id="L31" class="LineNr"> 31 </span><span class="Comment"># instruction effective address operand displacement immediate</span> +<span id="L32" class="LineNr"> 32 </span><span class="Comment"># op subop mod rm32 base index scale r32</span> +<span id="L33" class="LineNr"> 33 </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="L34" class="LineNr"> 34 </span> +<span id="L35" class="LineNr"> 35 </span><span class="Comment"># main: (manual test if this is the last file loaded)</span> +<span id="L36" class="LineNr"> 36 </span><span class="CommentedCode">#? e8/call test-write-appends/disp32</span> +<span id="L37" class="LineNr"> 37 </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="L38" class="LineNr"> 38 </span> <span class="Comment"># syscall(exit, Num-test-failures)</span> +<span id="L39" class="LineNr"> 39 </span> 8b/copy 0/mod/indirect 5/rm32/.disp32 <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 1/r32/EBX Num-test-failures/disp32 <span class="Comment"># copy *Num-test-failures to EBX</span> +<span id="L40" class="LineNr"> 40 </span> b8/copy-to-EAX 1/imm32 +<span id="L41" class="LineNr"> 41 </span> cd/syscall 0x80/imm8 +<span id="L42" class="LineNr"> 42 </span> +<span id="L43" class="LineNr"> 43 </span>write: <span class="Comment"># f : fd or (address stream), s : (address array byte) -> <void></span> +<span id="L44" class="LineNr"> 44 </span> <span class="Comment"># prolog</span> +<span id="L45" class="LineNr"> 45 </span> 55/push-EBP +<span id="L46" class="LineNr"> 46 </span> 89/copy 3/mod/direct 5/rm32/EBP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 4/r32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy ESP to EBP</span> +<span id="L47" class="LineNr"> 47 </span> <span class="Comment"># save registers</span> +<span id="L48" class="LineNr"> 48 </span> 50/push-EAX +<span id="L49" class="LineNr"> 49 </span> 51/push-ECX +<span id="L50" class="LineNr"> 50 </span> 52/push-EDX +<span id="L51" class="LineNr"> 51 </span> 53/push-EBX +<span id="L52" class="LineNr"> 52 </span> 56/push-ESI +<span id="L53" class="LineNr"> 53 </span> <span class="Comment"># if (f < 0x08000000) _write(f, s), return # f can't be a user-mode address, so treat it as a kernel file descriptor</span> +<span id="L54" class="LineNr"> 54 </span> 81 7/subop/compare 1/mod/*+disp8 4/rm32/sib 5/base/EBP 4/index/none <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 8/disp8 0x08000000/imm32 <span class="Comment"># compare *(EBP+8)</span> +<span id="L55" class="LineNr"> 55 </span> 7f/jump-if-greater $write:else/disp8 +<span id="L56" class="LineNr"> 56 </span> <span class="Comment"># push args</span> +<span id="L57" class="LineNr"> 57 </span> ff 6/subop/push 1/mod/*+disp8 4/rm32/sib 5/base/EBP 4/index/none <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 8/disp8 <span class="Delimiter"> . </span> <span class="Comment"># push *(EBP+8)</span> +<span id="L58" class="LineNr"> 58 </span> ff 6/subop/push 1/mod/*+disp8 4/rm32/sib 5/base/EBP 4/index/none <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0xc/disp8 <span class="Delimiter"> . </span> <span class="Comment"># push *(EBP+12)</span> +<span id="L59" class="LineNr"> 59 </span> <span class="Comment"># call</span> +<span id="L60" class="LineNr"> 60 </span> e8/call _write/disp32 +<span id="L61" class="LineNr"> 61 </span> <span class="Comment"># discard args</span> +<span id="L62" class="LineNr"> 62 </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 to ESP</span> +<span id="L63" class="LineNr"> 63 </span> eb/jump $write:end/disp8 +<span id="L64" class="LineNr"> 64 </span>$write:else: +<span id="L65" class="LineNr"> 65 </span> <span class="Comment"># otherwise, treat 'f' as a stream to append to</span> +<span id="L66" class="LineNr"> 66 </span> <span class="Comment">#</span> +<span id="L67" class="LineNr"> 67 </span> <span class="Comment"># pseudocode:</span> +<span id="L68" class="LineNr"> 68 </span> <span class="Comment"># destend = &f.data[t.length]</span> +<span id="L69" class="LineNr"> 69 </span> <span class="Comment"># oldw = f.write</span> +<span id="L70" class="LineNr"> 70 </span> <span class="Comment"># if s.length == 0 return</span> +<span id="L71" class="LineNr"> 71 </span> <span class="Comment"># f.write += s.length</span> +<span id="L72" class="LineNr"> 72 </span> <span class="Comment"># dest = &f.data[oldw]</span> +<span id="L73" class="LineNr"> 73 </span> <span class="Comment"># srcend = &s.data[s.length]</span> +<span id="L74" class="LineNr"> 74 </span> <span class="Comment"># src = &s.data[0]</span> +<span id="L75" class="LineNr"> 75 </span> <span class="Comment"># while true:</span> +<span id="L76" class="LineNr"> 76 </span> <span class="Comment"># if src >= srcend break</span> +<span id="L77" class="LineNr"> 77 </span> <span class="Comment"># if dest >= destend break # for now silently ignore filled up ostream buffer</span> +<span id="L78" class="LineNr"> 78 </span> <span class="Comment"># *dest = *src</span> +<span id="L79" class="LineNr"> 79 </span> <span class="Comment"># ++src</span> +<span id="L80" class="LineNr"> 80 </span> <span class="Comment"># ++dest</span> +<span id="L81" class="LineNr"> 81 </span> <span class="Comment">#</span> +<span id="L82" class="LineNr"> 82 </span> <span class="Comment"># key registers to set up for the loop:</span> +<span id="L83" class="LineNr"> 83 </span> <span class="Comment"># EAX/dest, ECX/destend, EBX/src, ESI/srcend</span> +<span id="L84" class="LineNr"> 84 </span> <span class="Comment"># we save EDX for byte operations (has to be one of the first 4 registers)</span> +<span id="L85" class="LineNr"> 85 </span> <span class="Comment">#</span> +<span id="L86" class="LineNr"> 86 </span> <span class="Comment"># register setup before the loop:</span> +<span id="L87" class="LineNr"> 87 </span> <span class="Comment"># EAX = *(EBP+8) # f</span> +<span id="L88" class="LineNr"> 88 </span> <span class="Comment"># EBX = *(EBP+12) # s</span> +<span id="L89" class="LineNr"> 89 </span> <span class="Comment"># ECX = *(EAX+4) # f.length</span> +<span id="L90" class="LineNr"> 90 </span> <span class="Comment"># ECX = EAX+8+ECX # destend = &f.data[f.length]</span> +<span id="L91" class="LineNr"> 91 </span> <span class="Comment"># ESI = *EAX # oldw = f.write</span> +<span id="L92" class="LineNr"> 92 </span> <span class="Comment"># EDX = *EBX # s.length</span> +<span id="L93" class="LineNr"> 93 </span> <span class="Comment"># *EAX = *EAX + EDX # update f.write (allowed to go past f.length)</span> +<span id="L94" class="LineNr"> 94 </span> <span class="Comment"># # do this here just because it's convenient</span> +<span id="L95" class="LineNr"> 95 </span> <span class="Comment"># EAX = EAX+8+ESI # dest = &f.data[oldw]</span> +<span id="L96" class="LineNr"> 96 </span> <span class="Comment"># ESI = EBX+4+EDX # srcend = &s.data[s.length]</span> +<span id="L97" class="LineNr"> 97 </span> <span class="Comment"># EBX = EBX+4 # src = &s.data[0]</span> +<span id="L98" class="LineNr"> 98 </span> <span class="Comment">#</span> +<span id="L99" class="LineNr"> 99 </span> <span class="Comment"># EAX = f</span> +<span id="L100" class="LineNr">100 </span> 8b/copy 1/mod/*+disp8 4/rm32/sib 5/base/EBP 4/index/none 0/r32/EAX 8/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy *(EBP+8) to EAX</span> +<span id="L101" class="LineNr">101 </span> <span class="Comment"># EBX = s</span> +<span id="L102" class="LineNr">102 </span> 8b/copy 1/mod/*+disp8 4/rm32/sib 5/base/EBP 4/index/none 3/r32/EBX 0xc/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy *(EBP+12) to EBX</span> +<span id="L103" class="LineNr">103 </span> <span class="Comment"># ECX = f.length</span> +<span id="L104" class="LineNr">104 </span> 8b/copy 1/mod/*+disp8 0/rm32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 1/r32/ECX 4/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy *(EAX+4) to ECX</span> +<span id="L105" class="LineNr">105 </span> <span class="Comment"># ECX/destend = &f.data[f.length]</span> +<span id="L106" class="LineNr">106 </span> 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/EAX 1/index/ECX <span class="Delimiter"> . </span> 1/r32/ECX 8/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy EAX+ECX+8 to ECX</span> +<span id="L107" class="LineNr">107 </span> <span class="Comment"># ESI/oldw = f.write</span> +<span id="L108" class="LineNr">108 </span> 8b/copy 0/mod/indirect 0/rm32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 6/r32/ESI <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy *EAX to ESI</span> +<span id="L109" class="LineNr">109 </span> <span class="Comment"># EDX = s.length</span> +<span id="L110" class="LineNr">110 </span> 8b/copy 0/mod/indirect 3/rm32/EBX <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 *EBX to EDX</span> +<span id="L111" class="LineNr">111 </span> <span class="Comment"># if EDX == 0 return</span> +<span id="L112" class="LineNr">112 </span> 81 7/subop/compare 3/mod/direct 2/rm32/EDX <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 EDX</span> +<span id="L113" class="LineNr">113 </span> 74/jump-if-equal $write:end/disp8 +<span id="L114" class="LineNr">114 </span> <span class="Comment"># f.write += s.length</span> +<span id="L115" class="LineNr">115 </span> 01/add 0/mod/indirect 0/rm32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 2/r32/EDX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># add EDX to *EAX</span> +<span id="L116" class="LineNr">116 </span> <span class="Comment"># EAX/dest = &f.data[oldw]</span> +<span id="L117" class="LineNr">117 </span> 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/EAX 6/index/ESI <span class="Delimiter"> . </span> 0/r32/EAX 8/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy EAX+ESI+8 to EAX</span> +<span id="L118" class="LineNr">118 </span> <span class="Comment"># ESI/srcend = &s.data[s.length]</span> +<span id="L119" class="LineNr">119 </span> 8d/copy-address 1/mod/*+disp8 4/rm32/sib 3/base/EBX 2/index/EDX <span class="Delimiter"> . </span> 6/r32/ESI 4/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy EBX+EDX+4 to ESI</span> +<span id="L120" class="LineNr">120 </span> <span class="Comment"># EBX/src = &s.data[0]</span> +<span id="L121" class="LineNr">121 </span> 81 0/subop/add 3/mod/direct 3/rm32/EBX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 4/imm32 <span class="Comment"># add to EBX</span> +<span id="L122" class="LineNr">122 </span> <span class="Comment"># while (true)</span> +<span id="L123" class="LineNr">123 </span>$write:loop: +<span id="L124" class="LineNr">124 </span> <span class="Comment"># if EBX/src >= ESI/srcend break</span> +<span id="L125" class="LineNr">125 </span> 39/compare 3/mod/direct 3/rm32/EBX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 6/r32/ESI <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># compare EBX with ESI</span> +<span id="L126" class="LineNr">126 </span> 7d/jump-if-greater-or-equal $write:end/disp8 +<span id="L127" class="LineNr">127 </span> <span class="Comment"># if EAX/dest >= ECX/destend break (for now silently ignore filled up ostream buffer)</span> +<span id="L128" class="LineNr">128 </span> 39/compare 3/mod/direct 0/rm32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 1/r32/ECX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># compare EAX with ECX</span> +<span id="L129" class="LineNr">129 </span> 7d/jump-if-greater-or-equal $write:end/disp8 +<span id="L130" class="LineNr">130 </span> <span class="Comment"># copy one byte</span> +<span id="L131" class="LineNr">131 </span> 8a/copy-byte 0/mod/indirect 3/rm32/EBX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 2/r32/DL <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy byte at *EBX to DL</span> +<span id="L132" class="LineNr">132 </span> 88/copy-byte 0/mod/indirect 0/rm32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 2/r32/DL <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy byte at DL to *EAX</span> +<span id="L133" class="LineNr">133 </span> <span class="Comment"># updates</span> +<span id="L134" class="LineNr">134 </span> 40/increment-EAX +<span id="L135" class="LineNr">135 </span> 43/increment-EBX +<span id="L136" class="LineNr">136 </span> eb/jump $write:loop/disp8 +<span id="L137" class="LineNr">137 </span>$write:end: +<span id="L138" class="LineNr">138 </span> <span class="Comment"># restore registers</span> +<span id="L139" class="LineNr">139 </span> 5e/pop-to-ESI +<span id="L140" class="LineNr">140 </span> 5b/pop-to-EBX +<span id="L141" class="LineNr">141 </span> 5a/pop-to-EDX +<span id="L142" class="LineNr">142 </span> 59/pop-to-ECX +<span id="L143" class="LineNr">143 </span> 58/pop-to-EAX +<span id="L144" class="LineNr">144 </span> <span class="Comment"># epilog</span> +<span id="L145" class="LineNr">145 </span> 89/copy 3/mod/direct 4/rm32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 5/r32/EBP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy EBP to ESP</span> +<span id="L146" class="LineNr">146 </span> 5d/pop-to-EBP +<span id="L147" class="LineNr">147 </span> c3/return +<span id="L148" class="LineNr">148 </span> +<span id="L149" class="LineNr">149 </span>clear-ostream: <span class="Comment"># f : (address ostream)</span> +<span id="L150" class="LineNr">150 </span> <span class="Comment"># prolog</span> +<span id="L151" class="LineNr">151 </span> 55/push-EBP +<span id="L152" class="LineNr">152 </span> 89/copy 3/mod/direct 5/rm32/EBP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 4/r32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy ESP to EBP</span> +<span id="L153" class="LineNr">153 </span> <span class="Comment"># save registers</span> +<span id="L154" class="LineNr">154 </span> 50/push-EAX +<span id="L155" class="LineNr">155 </span> 51/push-ECX +<span id="L156" class="LineNr">156 </span> <span class="Comment"># EAX = f</span> +<span id="L157" class="LineNr">157 </span> 8b/copy 1/mod/*+disp8 4/rm32/sib 5/base/EBP 4/index/none 0/r32/EAX 8/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy *(EBP+8) to EAX</span> +<span id="L158" class="LineNr">158 </span> <span class="Comment"># ECX = f.length</span> +<span id="L159" class="LineNr">159 </span> 8b/copy 1/mod/*+disp8 0/rm32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 1/r32/ECX 4/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy *(EAX+4) to ECX</span> +<span id="L160" class="LineNr">160 </span> <span class="Comment"># ECX = &f.data[f.length]</span> +<span id="L161" class="LineNr">161 </span> 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/EAX 1/index/ECX <span class="Delimiter"> . </span> 1/r32/ECX 8/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy EAX+ECX+8 to ECX</span> +<span id="L162" class="LineNr">162 </span> <span class="Comment"># f.write = 0</span> +<span id="L163" class="LineNr">163 </span> c7/copy 0/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"># copy to *EAX</span> +<span id="L164" class="LineNr">164 </span> <span class="Comment"># EAX = f.data</span> +<span id="L165" class="LineNr">165 </span> 81 0/subop/add 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> 8/imm32 <span class="Comment"># add to EAX</span> +<span id="L166" class="LineNr">166 </span> <span class="Comment"># while (true)</span> +<span id="L167" class="LineNr">167 </span>$clear-ostream:loop: +<span id="L168" class="LineNr">168 </span> <span class="Comment"># if EAX >= ECX break</span> +<span id="L169" class="LineNr">169 </span> 39/compare 3/mod/direct 0/rm32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 1/r32/ECX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># compare EAX with ECX</span> +<span id="L170" class="LineNr">170 </span> 7d/jump-if-greater-or-equal $clear-ostream:end/disp8 +<span id="L171" class="LineNr">171 </span> <span class="Comment"># *EAX = 0</span> +<span id="L172" class="LineNr">172 </span> c7/copy 0/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"># copy to *EAX</span> +<span id="L173" class="LineNr">173 </span> <span class="Comment"># EAX += 4</span> +<span id="L174" class="LineNr">174 </span> 81 0/subop/add 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> 4/imm32 <span class="Comment"># add to EAX</span> +<span id="L175" class="LineNr">175 </span> eb/jump $clear-ostream:loop/disp8 +<span id="L176" class="LineNr">176 </span>$clear-ostream:end: +<span id="L177" class="LineNr">177 </span> <span class="Comment"># restore registers</span> +<span id="L178" class="LineNr">178 </span> 59/pop-to-ECX +<span id="L179" class="LineNr">179 </span> 58/pop-to-EAX +<span id="L180" class="LineNr">180 </span> <span class="Comment"># epilog</span> +<span id="L181" class="LineNr">181 </span> 89/copy 3/mod/direct 4/rm32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 5/r32/EBP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy EBP to ESP</span> +<span id="L182" class="LineNr">182 </span> 5d/pop-to-EBP +<span id="L183" class="LineNr">183 </span> c3/return +<span id="L184" class="LineNr">184 </span> +<span id="L185" class="LineNr">185 </span>test-write-single: +<span id="L186" class="LineNr">186 </span> <span class="Comment"># clear-ostream(Test-ostream)</span> +<span id="L187" class="LineNr">187 </span> <span class="Comment"># push args</span> +<span id="L188" class="LineNr">188 </span> 68/push Test-ostream/imm32 +<span id="L189" class="LineNr">189 </span> <span class="Comment"># call</span> +<span id="L190" class="LineNr">190 </span> e8/call clear-ostream/disp32 +<span id="L191" class="LineNr">191 </span> <span class="Comment"># discard args</span> +<span id="L192" class="LineNr">192 </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 to ESP</span> +<span id="L193" class="LineNr">193 </span> <span class="Comment"># write(Test-ostream, "Ab")</span> +<span id="L194" class="LineNr">194 </span> <span class="Comment"># push args</span> +<span id="L195" class="LineNr">195 </span> 68/push "Ab"/imm32 +<span id="L196" class="LineNr">196 </span> 68/push Test-ostream/imm32 +<span id="L197" class="LineNr">197 </span> <span class="Comment"># call</span> +<span id="L198" class="LineNr">198 </span> e8/call write/disp32 +<span id="L199" class="LineNr">199 </span> <span class="Comment"># discard args</span> +<span id="L200" class="LineNr">200 </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 to ESP</span> +<span id="L201" class="LineNr">201 </span> <span class="Comment"># check-ints-equal(*Test-ostream.data, 41/A 62/b 00 00, msg)</span> +<span id="L202" class="LineNr">202 </span> <span class="Comment"># push args</span> +<span id="L203" class="LineNr">203 </span> 68/push "F - test-write-single"/imm32 +<span id="L204" class="LineNr">204 </span> 68/push 0x006241/imm32/Ab +<span id="L205" class="LineNr">205 </span> <span class="Comment"># push *Test-ostream.data</span> +<span id="L206" class="LineNr">206 </span> b8/copy-to-EAX Test-ostream/imm32 +<span id="L207" class="LineNr">207 </span> ff 6/subop/push 1/mod/*+disp8 0/rm32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 8/disp8 <span class="Delimiter"> . </span> <span class="Comment"># push *(EAX+8)</span> +<span id="L208" class="LineNr">208 </span> <span class="Comment"># call</span> +<span id="L209" class="LineNr">209 </span> e8/call check-ints-equal/disp32 +<span id="L210" class="LineNr">210 </span> <span class="Comment"># discard args</span> +<span id="L211" class="LineNr">211 </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 to ESP</span> +<span id="L212" class="LineNr">212 </span> <span class="Comment"># end</span> +<span id="L213" class="LineNr">213 </span> c3/return +<span id="L214" class="LineNr">214 </span> +<span id="L215" class="LineNr">215 </span>test-write-appends: +<span id="L216" class="LineNr">216 </span> <span class="Comment"># clear-ostream(Test-ostream)</span> +<span id="L217" class="LineNr">217 </span> <span class="Comment"># push args</span> +<span id="L218" class="LineNr">218 </span> 68/push Test-ostream/imm32 +<span id="L219" class="LineNr">219 </span> <span class="Comment"># call</span> +<span id="L220" class="LineNr">220 </span> e8/call clear-ostream/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> 4/imm32 <span class="Comment"># add to ESP</span> +<span id="L223" class="LineNr">223 </span> <span class="Comment"># write(Test-ostream, "C")</span> +<span id="L224" class="LineNr">224 </span> <span class="Comment"># push args</span> +<span id="L225" class="LineNr">225 </span> 68/push "C"/imm32 +<span id="L226" class="LineNr">226 </span> 68/push Test-ostream/imm32 +<span id="L227" class="LineNr">227 </span> <span class="Comment"># call</span> +<span id="L228" class="LineNr">228 </span> e8/call write/disp32 +<span id="L229" class="LineNr">229 </span> <span class="Comment"># discard args</span> +<span id="L230" class="LineNr">230 </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 to ESP</span> +<span id="L231" class="LineNr">231 </span> <span class="Comment"># write(Test-ostream, "D")</span> +<span id="L232" class="LineNr">232 </span> <span class="Comment"># push args</span> +<span id="L233" class="LineNr">233 </span> 68/push "D"/imm32 +<span id="L234" class="LineNr">234 </span> 68/push Test-ostream/imm32 +<span id="L235" class="LineNr">235 </span> <span class="Comment"># call</span> +<span id="L236" class="LineNr">236 </span> e8/call write/disp32 +<span id="L237" class="LineNr">237 </span> <span class="Comment"># discard args</span> +<span id="L238" class="LineNr">238 </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 to ESP</span> +<span id="L239" class="LineNr">239 </span> <span class="Comment"># check-ints-equal(*Test-ostream.data, 43/C 44/D 00 00, msg)</span> +<span id="L240" class="LineNr">240 </span> <span class="Comment"># push args</span> +<span id="L241" class="LineNr">241 </span> 68/push "F - test-write-appends"/imm32 +<span id="L242" class="LineNr">242 </span> 68/push 0x00004443/imm32/C-D +<span id="L243" class="LineNr">243 </span> <span class="Comment"># push *Test-ostream.data</span> +<span id="L244" class="LineNr">244 </span> b8/copy-to-EAX Test-ostream/imm32 +<span id="L245" class="LineNr">245 </span> ff 6/subop/push 1/mod/*+disp8 0/rm32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 8/disp8 <span class="Delimiter"> . </span> <span class="Comment"># push *(EAX+8)</span> +<span id="L246" class="LineNr">246 </span> <span class="Comment"># call</span> +<span id="L247" class="LineNr">247 </span> e8/call check-ints-equal/disp32 +<span id="L248" class="LineNr">248 </span> <span class="Comment"># discard args</span> +<span id="L249" class="LineNr">249 </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 to ESP</span> +<span id="L250" class="LineNr">250 </span> <span class="Comment"># end</span> +<span id="L251" class="LineNr">251 </span> c3/return +</pre> +</body> +</html> +<!-- vim: set foldmethod=manual : --> |