diff options
| author | Kartik K. Agaram <vc@akkartik.com> | 2017-10-18 03:11:56 -0700 |
|---|---|---|
| committer | Kartik K. Agaram <vc@akkartik.com> | 2017-10-18 03:11:56 -0700 |
| commit | 292ccba1bbdc8c2ec6cfacefa15f19c8d215b58c (patch) | |
| tree | e26c501e0d2dc826777a14047d66a7ef4de5cc2a /html/subx/016functions.cc.html | |
| parent | 8a0268317fbce2baa2e5119c796750ea6c80a813 (diff) | |
| download | mu-292ccba1bbdc8c2ec6cfacefa15f19c8d215b58c.tar.gz | |
4085 - done with first cut of the SubX VM
subx: 'call' and 'return' instructions
Diffstat (limited to 'html/subx/016functions.cc.html')
| -rw-r--r-- | html/subx/016functions.cc.html | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/html/subx/016functions.cc.html b/html/subx/016functions.cc.html new file mode 100644 index 00000000..ee7a2311 --- /dev/null +++ b/html/subx/016functions.cc.html @@ -0,0 +1,143 @@ +<!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/016functions.cc</title> +<meta name="Generator" content="Vim/7.4"> +<meta name="plugin-version" content="vim7.4_v2"> +<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"> +<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; } +.Constant { color: #00a0a0; } +.Special { color: #c00000; } +.Normal { color: #aaaaaa; background-color: #080808; padding-bottom: 1px; } +.SalientComment { color: #00ffff; } +.Delimiter { color: #800080; } +.LineNr { color: #444444; } +.Identifier { color: #c0a020; } +.Comment { color: #9090ff; } +.Comment a { color:#0000ee; text-decoration:underline; } +.PreProc { color: #800080; } +.traceContains { color: #008000; } +--> +</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">//:: call</span> +<span id="L2" class="LineNr"> 2 </span> +<span id="L3" class="LineNr"> 3 </span><span class="Delimiter">:(scenario call_imm32)</span> +<span id="L4" class="LineNr"> 4 </span><span class="Special">% Reg[ESP].u = 0x64;</span> +<span id="L5" class="LineNr"> 5 </span><span class="Comment"># op ModRM SIB displacement immediate</span> +<span id="L6" class="LineNr"> 6 </span> e8 a0 <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="Comment"># call function offset at 0x000000a0</span> +<span id="L7" class="LineNr"> 7 </span> <span class="Comment"># next EIP is 6</span> +<span id="L8" class="LineNr"> 8 </span><span class="traceContains">+run: call <a href='010core.cc.html#L219'>imm32</a> 0x000000a0</span> +<span id="L9" class="LineNr"> 9 </span><span class="traceContains">+run: decrementing <a href='010core.cc.html#L11'>ESP</a> to 0x00000060</span> +<span id="L10" class="LineNr">10 </span><span class="traceContains">+run: pushing value 0x00000006</span> +<span id="L11" class="LineNr">11 </span><span class="traceContains">+run: jumping to 0x000000a6</span> +<span id="L12" class="LineNr">12 </span> +<span id="L13" class="LineNr">13 </span><span class="Delimiter">:(before "End Single-Byte Opcodes")</span> +<span id="L14" class="LineNr">14 </span><span class="Normal">case</span> <span class="Constant">0xe8</span>: <span class="Delimiter">{</span> <span class="Comment">// call imm32 relative to next EIP</span> +<span id="L15" class="LineNr">15 </span> <span class="Normal">int32_t</span> offset = <a href='010core.cc.html#L219'>imm32</a><span class="Delimiter">();</span> +<span id="L16" class="LineNr">16 </span> <a href='003trace.cc.html#L160'>trace</a><span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"call <a href='010core.cc.html#L219'>imm32</a> 0x"</span> << <a href='010core.cc.html#L230'>HEXWORD</a> << offset << <a href='003trace.cc.html#L184'>end</a><span class="Delimiter">();</span> +<span id="L17" class="LineNr">17 </span> <a href='011direct_addressing.cc.html#L244'>push</a><span class="Delimiter">(</span><a href='010core.cc.html#L23'>EIP</a><span class="Delimiter">);</span> +<span id="L18" class="LineNr">18 </span> <a href='010core.cc.html#L23'>EIP</a> += offset<span class="Delimiter">;</span> +<span id="L19" class="LineNr">19 </span> <a href='003trace.cc.html#L160'>trace</a><span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"jumping to 0x"</span> << <a href='010core.cc.html#L230'>HEXWORD</a> << <a href='010core.cc.html#L23'>EIP</a> << <a href='003trace.cc.html#L184'>end</a><span class="Delimiter">();</span> +<span id="L20" class="LineNr">20 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> +<span id="L21" class="LineNr">21 </span><span class="Delimiter">}</span> +<span id="L22" class="LineNr">22 </span> +<span id="L23" class="LineNr">23 </span><span class="Comment">//:</span> +<span id="L24" class="LineNr">24 </span> +<span id="L25" class="LineNr">25 </span><span class="Delimiter">:(scenario call_r32)</span> +<span id="L26" class="LineNr">26 </span><span class="Special">% Reg[ESP].u = 0x64;</span> +<span id="L27" class="LineNr">27 </span><span class="Special">% Reg[EBX].u = 0x000000a0;</span> +<span id="L28" class="LineNr">28 </span><span class="Comment"># op ModRM SIB displacement immediate</span> +<span id="L29" class="LineNr">29 </span> ff d3 <span class="Comment"># call function offset at EBX (reg 3)</span> +<span id="L30" class="LineNr">30 </span> <span class="Comment"># next EIP is 3</span> +<span id="L31" class="LineNr">31 </span><span class="traceContains">+run: call to effective address</span> +<span id="L32" class="LineNr">32 </span><span class="traceContains">+run: effective address is <a href='010core.cc.html#L17'>reg</a> 3</span> +<span id="L33" class="LineNr">33 </span><span class="traceContains">+run: decrementing <a href='010core.cc.html#L11'>ESP</a> to 0x00000060</span> +<span id="L34" class="LineNr">34 </span><span class="traceContains">+run: pushing value 0x00000003</span> +<span id="L35" class="LineNr">35 </span><span class="traceContains">+run: jumping to 0x000000a3</span> +<span id="L36" class="LineNr">36 </span> +<span id="L37" class="LineNr">37 </span><span class="Delimiter">:(before "End Op ff Subops")</span> +<span id="L38" class="LineNr">38 </span><span class="Normal">case</span> <span class="Constant">2</span>: <span class="Delimiter">{</span> <span class="Comment">// call function pointer at r/m32</span> +<span id="L39" class="LineNr">39 </span> <a href='003trace.cc.html#L160'>trace</a><span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"call to effective address"</span> << <a href='003trace.cc.html#L184'>end</a><span class="Delimiter">();</span> +<span id="L40" class="LineNr">40 </span> <span class="Normal">int32_t</span>* offset = <a href='011direct_addressing.cc.html#L26'>effective_address</a><span class="Delimiter">(</span>modrm<span class="Delimiter">);</span> +<span id="L41" class="LineNr">41 </span> <a href='011direct_addressing.cc.html#L244'>push</a><span class="Delimiter">(</span><a href='010core.cc.html#L23'>EIP</a><span class="Delimiter">);</span> +<span id="L42" class="LineNr">42 </span> <a href='010core.cc.html#L23'>EIP</a> += *offset<span class="Delimiter">;</span> +<span id="L43" class="LineNr">43 </span> <a href='003trace.cc.html#L160'>trace</a><span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"jumping to 0x"</span> << <a href='010core.cc.html#L230'>HEXWORD</a> << <a href='010core.cc.html#L23'>EIP</a> << <a href='003trace.cc.html#L184'>end</a><span class="Delimiter">();</span> +<span id="L44" class="LineNr">44 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> +<span id="L45" class="LineNr">45 </span><span class="Delimiter">}</span> +<span id="L46" class="LineNr">46 </span> +<span id="L47" class="LineNr">47 </span><span class="Delimiter">:(scenario call_mem_at_r32)</span> +<span id="L48" class="LineNr">48 </span><span class="Special">% Reg[ESP].u = 0x64;</span> +<span id="L49" class="LineNr">49 </span><span class="Special">% Reg[EBX].u = 0x10;</span> +<span id="L50" class="LineNr">50 </span><span class="Special">% SET_WORD_IN_MEM(0x10, 0x000000a0);</span> +<span id="L51" class="LineNr">51 </span><span class="Comment"># op ModRM SIB displacement immediate</span> +<span id="L52" class="LineNr">52 </span> ff <span class="Constant">13</span> <span class="Comment"># call function offset at *EBX (reg 3)</span> +<span id="L53" class="LineNr">53 </span> <span class="Comment"># next EIP is 3</span> +<span id="L54" class="LineNr">54 </span><span class="traceContains">+run: call to effective address</span> +<span id="L55" class="LineNr">55 </span><span class="traceContains">+run: effective address is mem at address 0x10 (reg 3)</span> +<span id="L56" class="LineNr">56 </span><span class="traceContains">+run: decrementing <a href='010core.cc.html#L11'>ESP</a> to 0x00000060</span> +<span id="L57" class="LineNr">57 </span><span class="traceContains">+run: pushing value 0x00000003</span> +<span id="L58" class="LineNr">58 </span><span class="traceContains">+run: jumping to 0x000000a3</span> +<span id="L59" class="LineNr">59 </span> +<span id="L60" class="LineNr">60 </span><span class="SalientComment">//:: ret</span> +<span id="L61" class="LineNr">61 </span> +<span id="L62" class="LineNr">62 </span><span class="Delimiter">:(scenario ret)</span> +<span id="L63" class="LineNr">63 </span><span class="Special">% Reg[ESP].u = 0x60;</span> +<span id="L64" class="LineNr">64 </span><span class="Special">% SET_WORD_IN_MEM(0x60, 0x00000010);</span> +<span id="L65" class="LineNr">65 </span><span class="Comment"># op ModRM SIB displacement immediate</span> +<span id="L66" class="LineNr">66 </span> c3 +<span id="L67" class="LineNr">67 </span><span class="traceContains">+run: return</span> +<span id="L68" class="LineNr">68 </span><span class="traceContains">+run: popping value 0x00000010</span> +<span id="L69" class="LineNr">69 </span><span class="traceContains">+run: jumping to 0x00000010</span> +<span id="L70" class="LineNr">70 </span> +<span id="L71" class="LineNr">71 </span><span class="Delimiter">:(before "End Single-Byte Opcodes")</span> +<span id="L72" class="LineNr">72 </span><span class="Normal">case</span> <span class="Constant">0xc3</span>: <span class="Delimiter">{</span> <span class="Comment">// return from a call</span> +<span id="L73" class="LineNr">73 </span> <a href='003trace.cc.html#L160'>trace</a><span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"return"</span> << <a href='003trace.cc.html#L184'>end</a><span class="Delimiter">();</span> +<span id="L74" class="LineNr">74 </span> <a href='010core.cc.html#L23'>EIP</a> = <a href='011direct_addressing.cc.html#L277'>pop</a><span class="Delimiter">();</span> +<span id="L75" class="LineNr">75 </span> <a href='003trace.cc.html#L160'>trace</a><span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"jumping to 0x"</span> << <a href='010core.cc.html#L230'>HEXWORD</a> << <a href='010core.cc.html#L23'>EIP</a> << <a href='003trace.cc.html#L184'>end</a><span class="Delimiter">();</span> +<span id="L76" class="LineNr">76 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> +<span id="L77" class="LineNr">77 </span><span class="Delimiter">}</span> +</pre> +</body> +</html> +<!-- vim: set foldmethod=manual : --> |