diff options
| author | Kartik Agaram <vc@akkartik.com> | 2021-03-23 17:31:08 -0700 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2021-03-23 17:31:08 -0700 |
| commit | 3350c34a74844e21ea69077e01efff3bae64bdcd (patch) | |
| tree | fa06ba58542297d1cff6b78958d4547a40a25d21 /html/linux/bootstrap/011run.cc.html | |
| parent | 62a244211024a8367332541c571621883c05bcce (diff) | |
| download | mu-3350c34a74844e21ea69077e01efff3bae64bdcd.tar.gz | |
.
Diffstat (limited to 'html/linux/bootstrap/011run.cc.html')
| -rw-r--r-- | html/linux/bootstrap/011run.cc.html | 515 |
1 files changed, 515 insertions, 0 deletions
diff --git a/html/linux/bootstrap/011run.cc.html b/html/linux/bootstrap/011run.cc.html new file mode 100644 index 00000000..bc7b84ae --- /dev/null +++ b/html/linux/bootstrap/011run.cc.html @@ -0,0 +1,515 @@ +<!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 - linux/bootstrap/011run.cc</title> +<meta name="Generator" content="Vim/8.1"> +<meta name="plugin-version" content="vim8.1_v1"> +<meta name="syntax" content="cpp"> +<meta name="settings" content="number_lines,use_css,pre_wrap,no_foldcolumn,expand_tabs,line_ids,prevent_copy="> +<meta name="colorscheme" content="minimal-light"> +<style type="text/css"> +<!-- +pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #c6c6c6; } +body { font-size:12pt; font-family: monospace; color: #000000; background-color: #c6c6c6; } +a { color:inherit; } +* { font-size:12pt; font-size: 1em; } +.cSpecial { color: #008000; } +.Normal { color: #000000; background-color: #c6c6c6; padding-bottom: 1px; } +.LineNr { } +.Constant { color: #008787; } +.Comment { color: #005faf; } +.Delimiter { color: #c000c0; } +.Identifier { color: #af5f00; } +--> +</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; + } + var 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();'> +<a href='https://github.com/akkartik/mu/blob/main/linux/bootstrap/011run.cc'>https://github.com/akkartik/mu/blob/main/linux/bootstrap/011run.cc</a> +<pre id='vimCodeElement'> +<span id="L1" class="LineNr"> 1 </span><span class="Comment">//: Running SubX programs on the VM.</span> +<span id="L2" class="LineNr"> 2 </span> +<span id="L3" class="LineNr"> 3 </span><span class="Comment">//: (Not to be confused with the 'run' subcommand for running ELF binaries on</span> +<span id="L4" class="LineNr"> 4 </span><span class="Comment">//: the VM. That comes later.)</span> +<span id="L5" class="LineNr"> 5 </span> +<span id="L6" class="LineNr"> 6 </span><span class="Delimiter">:(before "End <a href='001help.cc.html#L53'>Help</a> Texts")</span> +<span id="L7" class="LineNr"> 7 </span><a href='001help.cc.html#L237'>put_new</a><span class="Delimiter">(</span><a href='001help.cc.html#L53'>Help</a><span class="Delimiter">,</span> <span class="Constant">"syntax"</span><span class="Delimiter">,</span> +<span id="L8" class="LineNr"> 8 </span> <span class="Constant">"SubX programs consist of <a href='011run.cc.html#L106'>segments</a>, each segment in turn consisting of lines.</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L9" class="LineNr"> 9 </span> <span class="Constant">"Line-endings are significant; each <a href='011run.cc.html#L121'>line</a> should contain a single</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L10" class="LineNr"> 10 </span> <span class="Constant">"instruction, macro or directive.</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L11" class="LineNr"> 11 </span> <span class="Constant">"</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L12" class="LineNr"> 12 </span> <span class="Constant">"Comments start with the '#' character. It should be at the start of a <a href='011run.cc.html#L127'>word</a></span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L13" class="LineNr"> 13 </span> <span class="Constant">"(start of <a href='011run.cc.html#L121'>line</a>, or following a space).</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L14" class="LineNr"> 14 </span> <span class="Constant">"</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L15" class="LineNr"> 15 </span> <span class="Constant">"Each segment starts with a header <a href='011run.cc.html#L121'>line</a>: a '==' delimiter followed by the <a href='011run.cc.html#L111'>name</a> of</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L16" class="LineNr"> 16 </span> <span class="Constant">"the segment and a (sometimes approximate) starting address in memory.</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L17" class="LineNr"> 17 </span> <span class="Constant">"The <a href='011run.cc.html#L111'>name</a> 'code' is special; instructions to execute should always go here.</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L18" class="LineNr"> 18 </span> <span class="Constant">"</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L19" class="LineNr"> 19 </span> <span class="Constant">"The resulting binary starts running code from a label called 'Entry'</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L20" class="LineNr"> 20 </span> <span class="Constant">"in the code segment.</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L21" class="LineNr"> 21 </span> <span class="Constant">"</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L22" class="LineNr"> 22 </span> <span class="Constant">"Segments with the same <a href='011run.cc.html#L111'>name</a> get merged together. This rule helps keep functions</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L23" class="LineNr"> 23 </span> <span class="Constant">"and their data close together in .subx files.</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L24" class="LineNr"> 24 </span> <span class="Constant">"You don't have to specify the starting address after the first time.</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L25" class="LineNr"> 25 </span> <span class="Constant">"</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L26" class="LineNr"> 26 </span> <span class="Constant">"Lines consist of a series of words. Words can contain arbitrary metadata</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L27" class="LineNr"> 27 </span> <span class="Constant">"after a '/', but they can never contain whitespace. Metadata has no effect</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L28" class="LineNr"> 28 </span> <span class="Constant">"at runtime, but can be handy when rewriting macros.</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L29" class="LineNr"> 29 </span> <span class="Constant">"</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L30" class="LineNr"> 30 </span> <span class="Constant">"Check out the example programs in the apps/ directory, particularly apps/ex*.</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L31" class="LineNr"> 31 </span><span class="Delimiter">);</span> +<span id="L32" class="LineNr"> 32 </span><span class="Delimiter">:(before "End <a href='001help.cc.html#L53'>Help</a> Contents")</span> +<span id="L33" class="LineNr"> 33 </span>cerr << <span class="Constant">" syntax</span><span class="cSpecial">\n</span><span class="Constant">"</span><span class="Delimiter">;</span> +<span id="L34" class="LineNr"> 34 </span> +<span id="L35" class="LineNr"> 35 </span><span class="Delimiter">:(code)</span> +<span id="L36" class="LineNr"> 36 </span><span class="Normal">void</span> <a href='011run.cc.html#L36'>test_copy_imm32_to_EAX</a><span class="Delimiter">()</span> <span class="Delimiter">{</span> +<span id="L37" class="LineNr"> 37 </span> <span class="Comment">// At the lowest level, SubX programs are a series of hex bytes, each</span> +<span id="L38" class="LineNr"> 38 </span> <span class="Comment">// (variable-length) instruction on one line.</span> +<span id="L39" class="LineNr"> 39 </span> <a href='011run.cc.html#L82'>run</a><span class="Delimiter">(</span> +<span id="L40" class="LineNr"> 40 </span> <span class="Comment">// Comments start with '#' and are ignored.</span> +<span id="L41" class="LineNr"> 41 </span> <span class="Constant">"# comment</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L42" class="LineNr"> 42 </span> <span class="Comment">// Segment headers start with '==', a name and a starting hex address.</span> +<span id="L43" class="LineNr"> 43 </span> <span class="Comment">// There's usually one code and one data segment. The code segment</span> +<span id="L44" class="LineNr"> 44 </span> <span class="Comment">// always comes first.</span> +<span id="L45" class="LineNr"> 45 </span> <span class="Constant">"== code 0x1</span><span class="cSpecial">\n</span><span class="Constant">"</span> <span class="Comment">// code segment</span> +<span id="L46" class="LineNr"> 46 </span> +<span id="L47" class="LineNr"> 47 </span> <span class="Comment">// After the header, each segment consists of lines, and each line</span> +<span id="L48" class="LineNr"> 48 </span> <span class="Comment">// consists of words separated by whitespace.</span> +<span id="L49" class="LineNr"> 49 </span> <span class="Comment">//</span> +<span id="L50" class="LineNr"> 50 </span> <span class="Comment">// All words can have metadata after a '/'. No spaces allowed in</span> +<span id="L51" class="LineNr"> 51 </span> <span class="Comment">// metadata, of course.</span> +<span id="L52" class="LineNr"> 52 </span> <span class="Comment">// Unrecognized metadata never causes errors, so you can use it for</span> +<span id="L53" class="LineNr"> 53 </span> <span class="Comment">// documentation.</span> +<span id="L54" class="LineNr"> 54 </span> <span class="Comment">//</span> +<span id="L55" class="LineNr"> 55 </span> <span class="Comment">// Within the code segment in particular, x86 instructions consist of</span> +<span id="L56" class="LineNr"> 56 </span> <span class="Comment">// some number of the following parts and sub-parts (see the Readme and</span> +<span id="L57" class="LineNr"> 57 </span> <span class="Comment">// cheatsheet.pdf for details):</span> +<span id="L58" class="LineNr"> 58 </span> <span class="Comment">// opcodes: 1-3 bytes</span> +<span id="L59" class="LineNr"> 59 </span> <span class="Comment">// ModR/M byte</span> +<span id="L60" class="LineNr"> 60 </span> <span class="Comment">// SIB byte</span> +<span id="L61" class="LineNr"> 61 </span> <span class="Comment">// displacement: 0/1/2/4 bytes</span> +<span id="L62" class="LineNr"> 62 </span> <span class="Comment">// immediate: 0/1/2/4 bytes</span> +<span id="L63" class="LineNr"> 63 </span> <span class="Comment">// opcode ModR/M SIB displacement immediate</span> +<span id="L64" class="LineNr"> 64 </span> <span class="Comment">// instruction mod, reg, Reg/Mem bits scale, index, base</span> +<span id="L65" class="LineNr"> 65 </span> <span class="Comment">// 1-3 bytes 0/1 byte 0/1 byte 0/1/2/4 bytes 0/1/2/4 bytes</span> +<span id="L66" class="LineNr"> 66 </span> <span class="Constant">" b8 . . . 0a 0b 0c 0d</span><span class="cSpecial">\n</span><span class="Constant">"</span> <span class="Comment">// copy 0x0d0c0b0a to EAX</span> +<span id="L67" class="LineNr"> 67 </span> <span class="Comment">// The periods are just to help the eye track long gaps between columns,</span> +<span id="L68" class="LineNr"> 68 </span> <span class="Comment">// and are otherwise ignored.</span> +<span id="L69" class="LineNr"> 69 </span> <span class="Delimiter">);</span> +<span id="L70" class="LineNr"> 70 </span> <span class="Comment">// This program, when run, causes the following events in the trace:</span> +<span id="L71" class="LineNr"> 71 </span> <a href='003trace.cc.html#L290'>CHECK_TRACE_CONTENTS</a><span class="Delimiter">(</span> +<span id="L72" class="LineNr"> 72 </span> <span class="Constant">"load: 0x00000001 -> b8</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L73" class="LineNr"> 73 </span> <span class="Constant">"load: 0x00000002 -> 0a</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L74" class="LineNr"> 74 </span> <span class="Constant">"load: 0x00000003 -> 0b</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L75" class="LineNr"> 75 </span> <span class="Constant">"load: 0x00000004 -> 0c</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L76" class="LineNr"> 76 </span> <span class="Constant">"load: 0x00000005 -> 0d</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L77" class="LineNr"> 77 </span> <span class="Constant">"run: copy imm32 0x0d0c0b0a to <a href='010vm.cc.html#L10'>EAX</a></span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L78" class="LineNr"> 78 </span> <span class="Delimiter">);</span> +<span id="L79" class="LineNr"> 79 </span><span class="Delimiter">}</span> +<span id="L80" class="LineNr"> 80 </span> +<span id="L81" class="LineNr"> 81 </span><span class="Comment">// top-level helper for tests: parse the input, load the hex bytes into memory, run</span> +<span id="L82" class="LineNr"> 82 </span><span class="Normal">void</span> <a href='011run.cc.html#L82'>run</a><span class="Delimiter">(</span><span class="Normal">const</span> string& text_bytes<span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span id="L83" class="LineNr"> 83 </span> program p<span class="Delimiter">;</span> +<span id="L84" class="LineNr"> 84 </span> istringstream in<span class="Delimiter">(</span>text_bytes<span class="Delimiter">);</span> +<span id="L85" class="LineNr"> 85 </span> <span class="Comment">// Loading Test Program</span> +<span id="L86" class="LineNr"> 86 </span> parse<span class="Delimiter">(</span>in<span class="Delimiter">,</span> p<span class="Delimiter">);</span> +<span id="L87" class="LineNr"> 87 </span> <span class="Normal">if</span> <span class="Delimiter">(</span><a href='003trace.cc.html#L262'>trace_contains_errors</a><span class="Delimiter">())</span> <span class="Identifier">return</span><span class="Delimiter">;</span> <span class="Comment">// if any stage raises errors, stop immediately</span> +<span id="L88" class="LineNr"> 88 </span> <span class="Comment">// Running Test Program</span> +<span id="L89" class="LineNr"> 89 </span> <a href='011run.cc.html#L248'>load</a><span class="Delimiter">(</span>p<span class="Delimiter">);</span> +<span id="L90" class="LineNr"> 90 </span> <span class="Normal">if</span> <span class="Delimiter">(</span><a href='003trace.cc.html#L262'>trace_contains_errors</a><span class="Delimiter">())</span> <span class="Identifier">return</span><span class="Delimiter">;</span> +<span id="L91" class="LineNr"> 91 </span> <span class="Comment">// convenience to keep tests concise: 'Entry' label need not be provided</span> +<span id="L92" class="LineNr"> 92 </span> <span class="Comment">// not allowed in real programs</span> +<span id="L93" class="LineNr"> 93 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>p<span class="Delimiter">.</span><a href='011run.cc.html#L105'>entry</a><span class="Delimiter">)</span> +<span id="L94" class="LineNr"> 94 </span> <a href='010vm.cc.html#L26'>EIP</a> = p<span class="Delimiter">.</span><a href='011run.cc.html#L105'>entry</a><span class="Delimiter">;</span> +<span id="L95" class="LineNr"> 95 </span> <span class="Normal">else</span> +<span id="L96" class="LineNr"> 96 </span> <a href='010vm.cc.html#L26'>EIP</a> = find<span class="Delimiter">(</span>p<span class="Delimiter">,</span> <span class="Constant">"code"</span><span class="Delimiter">)-></span>start<span class="Delimiter">;</span> +<span id="L97" class="LineNr"> 97 </span> <span class="Normal">while</span> <span class="Delimiter">(</span><a href='010vm.cc.html#L26'>EIP</a> < <a href='010vm.cc.html#L166'>End_of_program</a><span class="Delimiter">)</span> +<span id="L98" class="LineNr"> 98 </span> <a href='010vm.cc.html#L277'>run_one_instruction</a><span class="Delimiter">();</span> +<span id="L99" class="LineNr"> 99 </span><span class="Delimiter">}</span> +<span id="L100" class="LineNr">100 </span> +<span id="L101" class="LineNr">101 </span><span class="Comment">//:: core data structures</span> +<span id="L102" class="LineNr">102 </span> +<span id="L103" class="LineNr">103 </span><span class="Delimiter">:(before "End Types")</span> +<span id="L104" class="LineNr">104 </span><span class="Normal">struct</span> program <span class="Delimiter">{</span> +<span id="L105" class="LineNr">105 </span> <span class="Normal">uint32_t</span> <a href='011run.cc.html#L105'>entry</a><span class="Delimiter">;</span> +<span id="L106" class="LineNr">106 </span> vector<segment> <a href='011run.cc.html#L106'>segments</a><span class="Delimiter">;</span> +<span id="L107" class="LineNr">107 </span> program<span class="Delimiter">()</span> <span class="Delimiter">{</span> <a href='011run.cc.html#L105'>entry</a> = <span class="Constant">0</span><span class="Delimiter">;</span> <span class="Delimiter">}</span> +<span id="L108" class="LineNr">108 </span><span class="Delimiter">};</span> +<span id="L109" class="LineNr">109 </span><span class="Delimiter">:(before "struct program")</span> +<span id="L110" class="LineNr">110 </span><span class="Normal">struct</span> segment <span class="Delimiter">{</span> +<span id="L111" class="LineNr">111 </span> string <a href='011run.cc.html#L111'>name</a><span class="Delimiter">;</span> +<span id="L112" class="LineNr">112 </span> <span class="Normal">uint32_t</span> start<span class="Delimiter">;</span> +<span id="L113" class="LineNr">113 </span> vector<line> <a href='011run.cc.html#L113'>lines</a><span class="Delimiter">;</span> +<span id="L114" class="LineNr">114 </span> <span class="Comment">// End segment Fields</span> +<span id="L115" class="LineNr">115 </span> segment<span class="Delimiter">()</span> <span class="Delimiter">{</span> +<span id="L116" class="LineNr">116 </span> start = <span class="Constant">0</span><span class="Delimiter">;</span> +<span id="L117" class="LineNr">117 </span> <span class="Comment">// End segment Constructor</span> +<span id="L118" class="LineNr">118 </span> <span class="Delimiter">}</span> +<span id="L119" class="LineNr">119 </span><span class="Delimiter">};</span> +<span id="L120" class="LineNr">120 </span><span class="Delimiter">:(before "struct segment")</span> +<span id="L121" class="LineNr">121 </span><span class="Normal">struct</span> <a href='011run.cc.html#L121'>line</a> <span class="Delimiter">{</span> +<span id="L122" class="LineNr">122 </span> vector<word> <a href='011run.cc.html#L122'>words</a><span class="Delimiter">;</span> +<span id="L123" class="LineNr">123 </span> vector<string> metadata<span class="Delimiter">;</span> +<span id="L124" class="LineNr">124 </span> string original<span class="Delimiter">;</span> +<span id="L125" class="LineNr">125 </span><span class="Delimiter">};</span> +<span id="L126" class="LineNr">126 </span><span class="Delimiter">:(before "struct line")</span> +<span id="L127" class="LineNr">127 </span><span class="Normal">struct</span> <a href='011run.cc.html#L127'>word</a> <span class="Delimiter">{</span> +<span id="L128" class="LineNr">128 </span> string original<span class="Delimiter">;</span> +<span id="L129" class="LineNr">129 </span> string data<span class="Delimiter">;</span> +<span id="L130" class="LineNr">130 </span> vector<string> metadata<span class="Delimiter">;</span> +<span id="L131" class="LineNr">131 </span><span class="Delimiter">};</span> +<span id="L132" class="LineNr">132 </span> +<span id="L133" class="LineNr">133 </span><span class="Comment">//:: parse</span> +<span id="L134" class="LineNr">134 </span> +<span id="L135" class="LineNr">135 </span><span class="Delimiter">:(code)</span> +<span id="L136" class="LineNr">136 </span><span class="Normal">void</span> parse<span class="Delimiter">(</span>istream& fin<span class="Delimiter">,</span> program& out<span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span id="L137" class="LineNr">137 </span> segment* curr_segment = <span class="Constant">NULL</span><span class="Delimiter">;</span> +<span id="L138" class="LineNr">138 </span> vector<line> l<span class="Delimiter">;</span> +<span id="L139" class="LineNr">139 </span> <span class="Normal">while</span> <span class="Delimiter">(</span><a href='001help.cc.html#L249'>has_data</a><span class="Delimiter">(</span>fin<span class="Delimiter">))</span> <span class="Delimiter">{</span> +<span id="L140" class="LineNr">140 </span> string line_data<span class="Delimiter">;</span> +<span id="L141" class="LineNr">141 </span> <a href='011run.cc.html#L121'>line</a> curr<span class="Delimiter">;</span> +<span id="L142" class="LineNr">142 </span> getline<span class="Delimiter">(</span>fin<span class="Delimiter">,</span> line_data<span class="Delimiter">);</span> +<span id="L143" class="LineNr">143 </span> curr<span class="Delimiter">.</span>original = line_data<span class="Delimiter">;</span> +<span id="L144" class="LineNr">144 </span> <a href='003trace.cc.html#L96'>trace</a><span class="Delimiter">(</span><span class="Constant">99</span><span class="Delimiter">,</span> <span class="Constant">"parse"</span><span class="Delimiter">)</span> << <span class="Constant">"line: "</span> << line_data << end<span class="Delimiter">();</span> +<span id="L145" class="LineNr">145 </span> <span class="Comment">// End Line Parsing Special-cases(line_data -> l)</span> +<span id="L146" class="LineNr">146 </span> istringstream lin<span class="Delimiter">(</span>line_data<span class="Delimiter">);</span> +<span id="L147" class="LineNr">147 </span> <span class="Normal">while</span> <span class="Delimiter">(</span><a href='001help.cc.html#L249'>has_data</a><span class="Delimiter">(</span>lin<span class="Delimiter">))</span> <span class="Delimiter">{</span> +<span id="L148" class="LineNr">148 </span> string word_data<span class="Delimiter">;</span> +<span id="L149" class="LineNr">149 </span> lin >> word_data<span class="Delimiter">;</span> +<span id="L150" class="LineNr">150 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>word_data<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">continue</span><span class="Delimiter">;</span> +<span id="L151" class="LineNr">151 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>word_data[<span class="Constant">0</span>] == <span class="Constant">'#'</span><span class="Delimiter">)</span> <span class="Identifier">break</span><span class="Delimiter">;</span> <span class="Comment">// comment</span> +<span id="L152" class="LineNr">152 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>word_data == <span class="Constant">"."</span><span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span> <span class="Comment">// comment token</span> +<span id="L153" class="LineNr">153 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>word_data == <span class="Constant">"=="</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span id="L154" class="LineNr">154 </span> <a href='011run.cc.html#L198'>flush</a><span class="Delimiter">(</span>curr_segment<span class="Delimiter">,</span> l<span class="Delimiter">);</span> +<span id="L155" class="LineNr">155 </span> string segment_name<span class="Delimiter">;</span> +<span id="L156" class="LineNr">156 </span> lin >> segment_name<span class="Delimiter">;</span> +<span id="L157" class="LineNr">157 </span> curr_segment = find<span class="Delimiter">(</span>out<span class="Delimiter">,</span> segment_name<span class="Delimiter">);</span> +<span id="L158" class="LineNr">158 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>curr_segment != <span class="Constant">NULL</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span id="L159" class="LineNr">159 </span> <a href='003trace.cc.html#L96'>trace</a><span class="Delimiter">(</span><span class="Constant">3</span><span class="Delimiter">,</span> <span class="Constant">"parse"</span><span class="Delimiter">)</span> << <span class="Constant">"appending to segment '"</span> << segment_name << <span class="Constant">"'"</span> << end<span class="Delimiter">();</span> +<span id="L160" class="LineNr">160 </span> <span class="Delimiter">}</span> +<span id="L161" class="LineNr">161 </span> <span class="Normal">else</span> <span class="Delimiter">{</span> +<span id="L162" class="LineNr">162 </span> <a href='003trace.cc.html#L96'>trace</a><span class="Delimiter">(</span><span class="Constant">3</span><span class="Delimiter">,</span> <span class="Constant">"parse"</span><span class="Delimiter">)</span> << <span class="Constant">"new segment '"</span> << segment_name << <span class="Constant">"'"</span> << end<span class="Delimiter">();</span> +<span id="L163" class="LineNr">163 </span> <span class="Normal">uint32_t</span> seg_start = <span class="Constant">0</span><span class="Delimiter">;</span> +<span id="L164" class="LineNr">164 </span> lin >> std::hex >> seg_start<span class="Delimiter">;</span> +<span id="L165" class="LineNr">165 </span> <a href='011run.cc.html#L219'>sanity_check_program_segment</a><span class="Delimiter">(</span>out<span class="Delimiter">,</span> seg_start<span class="Delimiter">);</span> +<span id="L166" class="LineNr">166 </span> out<span class="Delimiter">.</span><a href='011run.cc.html#L106'>segments</a><span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>segment<span class="Delimiter">());</span> +<span id="L167" class="LineNr">167 </span> curr_segment = &out<span class="Delimiter">.</span><a href='011run.cc.html#L106'>segments</a><span class="Delimiter">.</span>back<span class="Delimiter">();</span> +<span id="L168" class="LineNr">168 </span> curr_segment<span class="Delimiter">-></span><a href='011run.cc.html#L111'>name</a> = segment_name<span class="Delimiter">;</span> +<span id="L169" class="LineNr">169 </span> curr_segment<span class="Delimiter">-></span>start = seg_start<span class="Delimiter">;</span> +<span id="L170" class="LineNr">170 </span> <span class="Normal">if</span> <span class="Delimiter">(</span><a href='003trace.cc.html#L262'>trace_contains_errors</a><span class="Delimiter">())</span> <span class="Identifier">continue</span><span class="Delimiter">;</span> +<span id="L171" class="LineNr">171 </span> <a href='003trace.cc.html#L96'>trace</a><span class="Delimiter">(</span><span class="Constant">3</span><span class="Delimiter">,</span> <span class="Constant">"parse"</span><span class="Delimiter">)</span> << <span class="Constant">"starts at address 0x"</span> << <a href='010vm.cc.html#L408'>HEXWORD</a> << curr_segment<span class="Delimiter">-></span>start << end<span class="Delimiter">();</span> +<span id="L172" class="LineNr">172 </span> <span class="Delimiter">}</span> +<span id="L173" class="LineNr">173 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> <span class="Comment">// skip rest of line</span> +<span id="L174" class="LineNr">174 </span> <span class="Delimiter">}</span> +<span id="L175" class="LineNr">175 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>word_data[<span class="Constant">0</span>] == <span class="Constant">':'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span id="L176" class="LineNr">176 </span> <span class="Comment">// todo: line metadata</span> +<span id="L177" class="LineNr">177 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> +<span id="L178" class="LineNr">178 </span> <span class="Delimiter">}</span> +<span id="L179" class="LineNr">179 </span> curr<span class="Delimiter">.</span><a href='011run.cc.html#L122'>words</a><span class="Delimiter">.</span>push_back<span class="Delimiter">(</span><a href='011run.cc.html#L127'>word</a><span class="Delimiter">());</span> +<span id="L180" class="LineNr">180 </span> <a href='011run.cc.html#L209'>parse_word</a><span class="Delimiter">(</span>word_data<span class="Delimiter">,</span> curr<span class="Delimiter">.</span><a href='011run.cc.html#L122'>words</a><span class="Delimiter">.</span>back<span class="Delimiter">());</span> +<span id="L181" class="LineNr">181 </span> <a href='003trace.cc.html#L96'>trace</a><span class="Delimiter">(</span><span class="Constant">99</span><span class="Delimiter">,</span> <span class="Constant">"parse"</span><span class="Delimiter">)</span> << <span class="Constant">"word: "</span> << to_string<span class="Delimiter">(</span>curr<span class="Delimiter">.</span><a href='011run.cc.html#L122'>words</a><span class="Delimiter">.</span>back<span class="Delimiter">());</span> +<span id="L182" class="LineNr">182 </span> <span class="Delimiter">}</span> +<span id="L183" class="LineNr">183 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>!curr<span class="Delimiter">.</span><a href='011run.cc.html#L122'>words</a><span class="Delimiter">.</span>empty<span class="Delimiter">())</span> +<span id="L184" class="LineNr">184 </span> l<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>curr<span class="Delimiter">);</span> +<span id="L185" class="LineNr">185 </span> <span class="Delimiter">}</span> +<span id="L186" class="LineNr">186 </span> <a href='011run.cc.html#L198'>flush</a><span class="Delimiter">(</span>curr_segment<span class="Delimiter">,</span> l<span class="Delimiter">);</span> +<span id="L187" class="LineNr">187 </span> <a href='003trace.cc.html#L96'>trace</a><span class="Delimiter">(</span><span class="Constant">99</span><span class="Delimiter">,</span> <span class="Constant">"parse"</span><span class="Delimiter">)</span> << <span class="Constant">"done"</span> << end<span class="Delimiter">();</span> +<span id="L188" class="LineNr">188 </span><span class="Delimiter">}</span> +<span id="L189" class="LineNr">189 </span> +<span id="L190" class="LineNr">190 </span>segment* find<span class="Delimiter">(</span>program& p<span class="Delimiter">,</span> <span class="Normal">const</span> string& segment_name<span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span id="L191" class="LineNr">191 </span> <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i < <a href='001help.cc.html#L168'>SIZE</a><span class="Delimiter">(</span>p<span class="Delimit |