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| -rw-r--r-- | html/subx/012indirect_addressing.cc.html | 6 | ||||
| -rw-r--r-- | html/subx/016functions.cc.html | 143 | ||||
| -rw-r--r-- | subx/012indirect_addressing.cc | 6 | ||||
| -rw-r--r-- | subx/016functions.cc | 77 |
4 files changed, 226 insertions, 6 deletions
diff --git a/html/subx/012indirect_addressing.cc.html b/html/subx/012indirect_addressing.cc.html index 781b9ad2..11eb2746 100644 --- a/html/subx/012indirect_addressing.cc.html +++ b/html/subx/012indirect_addressing.cc.html @@ -388,11 +388,11 @@ if ('onhashchange' in window) { <span id="L323" class="LineNr">323 </span><span class="traceAbsent">-run: inst: 0x00000003</span> <span id="L324" class="LineNr">324 </span> <span id="L325" class="LineNr">325 </span><span class="Delimiter">:(before "End Single-Byte Opcodes")</span> -<span id="L326" class="LineNr">326 </span><span class="Normal">case</span> <span class="Constant">0xff</span>: <span class="Delimiter">{</span> <span class="Comment">// jump to r/m32</span> +<span id="L326" class="LineNr">326 </span><span class="Normal">case</span> <span class="Constant">0xff</span>: <span class="Delimiter">{</span> <span id="L327" class="LineNr">327 </span> <span class="Normal">uint8_t</span> modrm = <a href='010core.cc.html#L214'>next</a><span class="Delimiter">();</span> <span id="L328" class="LineNr">328 </span> <span class="Normal">uint8_t</span> subop = <span class="Delimiter">(</span>modrm>><span class="Constant">3</span><span class="Delimiter">)</span>&<span class="Constant">0x7</span><span class="Delimiter">;</span> <span class="Comment">// middle 3 'reg opcode' bits</span> <span id="L329" class="LineNr">329 </span> <span class="Normal">switch</span> <span class="Delimiter">(</span>subop<span class="Delimiter">)</span> <span class="Delimiter">{</span> -<span id="L330" class="LineNr">330 </span> <span class="Conceal">¦</span> <span class="Normal">case</span> <span class="Constant">4</span>: <span class="Delimiter">{</span> +<span id="L330" class="LineNr">330 </span> <span class="Conceal">¦</span> <span class="Normal">case</span> <span class="Constant">4</span>: <span class="Delimiter">{</span> <span class="Comment">// jump to r/m32</span> <span id="L331" class="LineNr">331 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</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">"jump to effective address"</span> << <a href='003trace.cc.html#L184'>end</a><span class="Delimiter">();</span> <span id="L332" class="LineNr">332 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Normal">int32_t</span>* arg2 = <a href='011direct_addressing.cc.html#L26'>effective_address</a><span class="Delimiter">(</span>modrm<span class="Delimiter">);</span> <span id="L333" class="LineNr">333 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <a href='010core.cc.html#L23'>EIP</a> = *arg2<span class="Delimiter">;</span> @@ -418,7 +418,7 @@ if ('onhashchange' in window) { <span id="L353" class="LineNr">353 </span><span class="traceContains">+run: pushing value 0x000000af</span> <span id="L354" class="LineNr">354 </span> <span id="L355" class="LineNr">355 </span><span class="Delimiter">:(before "End Op ff Subops")</span> -<span id="L356" class="LineNr">356 </span><span class="Normal">case</span> <span class="Constant">6</span>: <span class="Delimiter">{</span> +<span id="L356" class="LineNr">356 </span><span class="Normal">case</span> <span class="Constant">6</span>: <span class="Delimiter">{</span> <span class="Comment">// push r/m32 to stack</span> <span id="L357" class="LineNr">357 </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">"push effective address"</span> << <a href='003trace.cc.html#L184'>end</a><span class="Delimiter">();</span> <span id="L358" class="LineNr">358 </span> <span class="Normal">const</span> <span class="Normal">int32_t</span>* val = <a href='011direct_addressing.cc.html#L26'>effective_address</a><span class="Delimiter">(</span>modrm<span class="Delimiter">);</span> <span id="L359" class="LineNr">359 </span> <a href='011direct_addressing.cc.html#L244'>push</a><span class="Delimiter">(</span>*val<span class="Delimiter">);</span> 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 : --> diff --git a/subx/012indirect_addressing.cc b/subx/012indirect_addressing.cc index f4e8c665..0acd7a1e 100644 --- a/subx/012indirect_addressing.cc +++ b/subx/012indirect_addressing.cc @@ -323,11 +323,11 @@ case 0x8b: { // copy r32 to r/m32 -run: inst: 0x00000003 :(before "End Single-Byte Opcodes") -case 0xff: { // jump to r/m32 +case 0xff: { uint8_t modrm = next(); uint8_t subop = (modrm>>3)&0x7; // middle 3 'reg opcode' bits switch (subop) { - case 4: { + case 4: { // jump to r/m32 trace(2, "run") << "jump to effective address" << end(); int32_t* arg2 = effective_address(modrm); EIP = *arg2; @@ -353,7 +353,7 @@ case 0xff: { // jump to r/m32 +run: pushing value 0x000000af :(before "End Op ff Subops") -case 6: { +case 6: { // push r/m32 to stack trace(2, "run") << "push effective address" << end(); const int32_t* val = effective_address(modrm); push(*val); diff --git a/subx/016functions.cc b/subx/016functions.cc new file mode 100644 index 00000000..7837f080 --- /dev/null +++ b/subx/016functions.cc @@ -0,0 +1,77 @@ +//:: call + +:(scenario call_imm32) +% Reg[ESP].u = 0x64; +# op ModRM SIB displacement immediate + e8 a0 00 00 00 # call function offset at 0x000000a0 + # next EIP is 6 ++run: call imm32 0x000000a0 ++run: decrementing ESP to 0x00000060 ++run: pushing value 0x00000006 ++run: jumping to 0x000000a6 + +:(before "End Single-Byte Opcodes") +case 0xe8: { // call imm32 relative to next EIP + int32_t offset = imm32(); + trace(2, "run") << "call imm32 0x" << HEXWORD << offset << end(); + push(EIP); + EIP += offset; + trace(2, "run") << "jumping to 0x" << HEXWORD << EIP << end(); + break; +} + +//: + +:(scenario call_r32) +% Reg[ESP].u = 0x64; +% Reg[EBX].u = 0x000000a0; +# op ModRM SIB displacement immediate + ff d3 # call function offset at EBX (reg 3) + # next EIP is 3 ++run: call to effective address ++run: effective address is reg 3 ++run: decrementing ESP to 0x00000060 ++run: pushing value 0x00000003 ++run: jumping to 0x000000a3 + +:(before "End Op ff Subops") +case 2: { // call function pointer at r/m32 + trace(2, "run") << "call to effective address" << end(); + int32_t* offset = effective_address(modrm); + push(EIP); + EIP += *offset; + trace(2, "run") << "jumping to 0x" << HEXWORD << EIP << end(); + break; +} + +:(scenario call_mem_at_r32) +% Reg[ESP].u = 0x64; +% Reg[EBX].u = 0x10; +% SET_WORD_IN_MEM(0x10, 0x000000a0); +# op ModRM SIB displacement immediate + ff 13 # call function offset at *EBX (reg 3) + # next EIP is 3 ++run: call to effective address ++run: effective address is mem at address 0x10 (reg 3) ++run: decrementing ESP to 0x00000060 ++run: pushing value 0x00000003 ++run: jumping to 0x000000a3 + +//:: ret + +:(scenario ret) +% Reg[ESP].u = 0x60; +% SET_WORD_IN_MEM(0x60, 0x00000010); +# op ModRM SIB displacement immediate + c3 ++run: return ++run: popping value 0x00000010 ++run: jumping to 0x00000010 + +:(before "End Single-Byte Opcodes") +case 0xc3: { // return from a call + trace(2, "run") << "return" << end(); + EIP = pop(); + trace(2, "run") << "jumping to 0x" << HEXWORD << EIP << end(); + break; +} |