diff options
| author | Kartik Agaram <vc@akkartik.com> | 2018-09-07 15:08:54 -0700 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2018-09-07 15:08:54 -0700 |
| commit | 608a7fa8d0faf9a3e3d182d9eabe969804443aab (patch) | |
| tree | 7e1934d9ef0e8372381c306312591235c4f27110 /html/subx/014indirect_addressing.cc.html | |
| parent | a6517ed821ff39fa56eb3b975799d22497d78a48 (diff) | |
| download | mu-608a7fa8d0faf9a3e3d182d9eabe969804443aab.tar.gz | |
4536
Diffstat (limited to 'html/subx/014indirect_addressing.cc.html')
| -rw-r--r-- | html/subx/014indirect_addressing.cc.html | 477 |
1 files changed, 268 insertions, 209 deletions
diff --git a/html/subx/014indirect_addressing.cc.html b/html/subx/014indirect_addressing.cc.html index 43b9e5be..79362ee9 100644 --- a/html/subx/014indirect_addressing.cc.html +++ b/html/subx/014indirect_addressing.cc.html @@ -3,7 +3,7 @@ <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>Mu - subx/014indirect_addressing.cc</title> -<meta name="Generator" content="Vim/7.4"> +<meta name="Generator" content="Vim/8.0"> <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="> @@ -15,19 +15,19 @@ body { font-size: 12pt; font-family: monospace; color: #aaaaaa; background-color a { color:#eeeeee; text-decoration: none; } a:hover { text-decoration: underline; } * { font-size: 12pt; font-size: 1em; } -.Constant { color: #00a0a0; } -.Special { color: #c00000; } +.Error { color: #ffffff; background-color: #ff6060; padding-bottom: 1px; } +.traceContains { color: #008000; } +.LineNr { color: #444444; } .traceAbsent { color: #c00000; } +.Constant { color: #00a0a0; } .SalientComment { color: #00ffff; } -.Comment { color: #9090ff; } -.Comment a { color:#0000ee; text-decoration:underline; } .Delimiter { color: #800080; } -.LineNr { color: #444444; } +.Special { color: #c00000; } .Identifier { color: #c0a020; } .Normal { color: #aaaaaa; background-color: #080808; padding-bottom: 1px; } +.Comment { color: #9090ff; } +.Comment a { color:#0000ee; text-decoration:underline; } .PreProc { color: #800080; } -.traceContains { color: #008000; } -.Error { color: #ffffff; background-color: #ff6060; padding-bottom: 1px; } --> </style> @@ -427,7 +427,7 @@ if ('onhashchange' in window) { <span id="L363" class="LineNr">363 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> <span id="L364" class="LineNr">364 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> <span id="L365" class="LineNr">365 </span> 8b <span class="Constant">18</span> <span class="Comment"># copy *EAX to EBX</span> -<span id="L366" class="LineNr">366 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX)</span> +<span id="L366" class="LineNr">366 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 011 (src EBX) 000 (dest EAX)</span> <span id="L367" class="LineNr">367 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> <span id="L368" class="LineNr">368 </span>af <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"># 0xaf</span> <span id="L369" class="LineNr">369 </span><span class="traceContains">+run: copy r/m32 to <a href='010---vm.cc.html#L16'>EBX</a></span> @@ -445,212 +445,271 @@ if ('onhashchange' in window) { <span id="L381" class="LineNr">381 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> <span id="L382" class="LineNr">382 </span><span class="Delimiter">}</span> <span id="L383" class="LineNr">383 </span> -<span id="L384" class="LineNr">384 </span><span class="SalientComment">//:: jump</span> +<span id="L384" class="LineNr">384 </span><span class="Comment">//:</span> <span id="L385" class="LineNr">385 </span> <span id="L386" class="LineNr">386 </span><span class="Delimiter">:(before "End Initialize Op Names(name)")</span> -<span id="L387" class="LineNr">387 </span><a href='001help.cc.html#L243'>put</a><span class="Delimiter">(</span><a href='010---vm.cc.html#L228'>name</a><span class="Delimiter">,</span> <span class="Constant">"ff"</span><span class="Delimiter">,</span> <span class="Constant">"jump/push/call rm32 based on subop"</span><span class="Delimiter">);</span> +<span id="L387" class="LineNr">387 </span><a href='001help.cc.html#L243'>put</a><span class="Delimiter">(</span><a href='010---vm.cc.html#L228'>name</a><span class="Delimiter">,</span> <span class="Constant">"88"</span><span class="Delimiter">,</span> <span class="Constant">"copy r8 (lowermost byte of r32) to r8/m8-at-r32"</span><span class="Delimiter">);</span> <span id="L388" class="LineNr">388 </span> -<span id="L389" class="LineNr">389 </span><span class="Delimiter">:(scenario jump_mem_at_r32)</span> -<span id="L390" class="LineNr">390 </span><span class="Special">% Reg[EAX].i = 0x60;</span> -<span id="L391" class="LineNr">391 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> -<span id="L392" class="LineNr">392 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> -<span id="L393" class="LineNr">393 </span> ff <span class="Constant">20</span> <span class="Comment"># jump to *EAX</span> -<span id="L394" class="LineNr">394 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 100 (jump to r/m32) 000 (src EAX)</span> -<span id="L395" class="LineNr">395 </span> <span class="PreProc">0</span><span class="Constant">5</span> <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="PreProc">0</span><span class="Constant">1</span> -<span id="L396" class="LineNr">396 </span> <span class="PreProc">0</span><span class="Constant">5</span> <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="PreProc">0</span><span class="Constant">2</span> -<span id="L397" class="LineNr">397 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> -<span id="L398" class="LineNr">398 </span><span class="Error">08</span> <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"># 8</span> -<span id="L399" class="LineNr">399 </span><span class="traceContains">+run: inst: 0x00000001</span> -<span id="L400" class="LineNr">400 </span><span class="traceContains">+run: jump to r/m32</span> -<span id="L401" class="LineNr">401 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> -<span id="L402" class="LineNr">402 </span><span class="traceContains">+run: jumping to 0x00000008</span> -<span id="L403" class="LineNr">403 </span><span class="traceContains">+run: inst: 0x00000008</span> -<span id="L404" class="LineNr">404 </span><span class="traceAbsent">-run: inst: 0x00000003</span> -<span id="L405" class="LineNr">405 </span> -<span id="L406" class="LineNr">406 </span><span class="Delimiter">:(before "End Single-Byte Opcodes")</span> -<span id="L407" class="LineNr">407 </span><span class="Normal">case</span> <span class="Constant">0xff</span>: <span class="Delimiter">{</span> -<span id="L408" class="LineNr">408 </span> <span class="Normal">uint8_t</span> modrm = <a href='010---vm.cc.html#L214'>next</a><span class="Delimiter">();</span> -<span id="L409" class="LineNr">409 </span> <span class="Normal">uint8_t</span> <a href='036recommend_labels.cc.html#L54'>subop</a> = <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="L410" class="LineNr">410 </span> <span class="Normal">switch</span> <span class="Delimiter">(</span><a href='036recommend_labels.cc.html#L54'>subop</a><span class="Delimiter">)</span> <span class="Delimiter">{</span> -<span id="L411" class="LineNr">411 </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="L412" class="LineNr">412 </span> <a href='003trace.cc.html#L196'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"jump to r/m32"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> -<span id="L413" class="LineNr">413 </span> <span class="Normal">int32_t</span>* arg2 = <a href='013direct_addressing.cc.html#L31'>effective_address</a><span class="Delimiter">(</span>modrm<span class="Delimiter">);</span> -<span id="L414" class="LineNr">414 </span> <a href='010---vm.cc.html#L29'>EIP</a> = *arg2<span class="Delimiter">;</span> -<span id="L415" class="LineNr">415 </span> <a href='003trace.cc.html#L196'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"jumping to 0x"</span> << <a href='010---vm.cc.html#L260'>HEXWORD</a> << <a href='010---vm.cc.html#L29'>EIP</a> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> -<span id="L416" class="LineNr">416 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> -<span id="L417" class="LineNr">417 </span> <span class="Delimiter">}</span> -<span id="L418" class="LineNr">418 </span> <span class="Comment">// End Op ff Subops</span> -<span id="L419" class="LineNr">419 </span> <span class="Delimiter">}</span> -<span id="L420" class="LineNr">420 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> -<span id="L421" class="LineNr">421 </span><span class="Delimiter">}</span> -<span id="L422" class="LineNr">422 </span> -<span id="L423" class="LineNr">423 </span><span class="SalientComment">//:: push</span> -<span id="L424" class="LineNr">424 </span> -<span id="L425" class="LineNr">425 </span><span class="Delimiter">:(scenario push_mem_at_r32)</span> -<span id="L426" class="LineNr">426 </span><span class="Special">% Reg[EAX].i = 0x60;</span> -<span id="L427" class="LineNr">427 </span><span class="Special">% Reg[ESP].u = 0x14;</span> -<span id="L428" class="LineNr">428 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> -<span id="L429" class="LineNr">429 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> -<span id="L430" class="LineNr">430 </span> ff <span class="Constant">30</span> <span class="Comment"># push *EAX to stack</span> -<span id="L431" class="LineNr">431 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 110 (push r/m32) 000 (src EAX)</span> -<span id="L432" class="LineNr">432 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> -<span id="L433" class="LineNr">433 </span>af <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"># 0xaf</span> -<span id="L434" class="LineNr">434 </span><span class="traceContains">+run: <a href='013direct_addressing.cc.html#L371'>push</a> r/m32</span> -<span id="L435" class="LineNr">435 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> -<span id="L436" class="LineNr">436 </span><span class="traceContains">+run: decrementing <a href='010---vm.cc.html#L17'>ESP</a> to 0x00000010</span> -<span id="L437" class="LineNr">437 </span><span class="traceContains">+run: pushing value 0x000000af</span> -<span id="L438" class="LineNr">438 </span> -<span id="L439" class="LineNr">439 </span><span class="Delimiter">:(before "End Op ff Subops")</span> -<span id="L440" class="LineNr">440 </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="L441" class="LineNr">441 </span> <a href='003trace.cc.html#L196'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"push r/m32"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> -<span id="L442" class="LineNr">442 </span> <span class="Normal">const</span> <span class="Normal">int32_t</span>* val = <a href='013direct_addressing.cc.html#L31'>effective_address</a><span class="Delimiter">(</span>modrm<span class="Delimiter">);</span> -<span id="L443" class="LineNr">443 </span> <a href='013direct_addressing.cc.html#L371'>push</a><span class="Delimiter">(</span>*val<span class="Delimiter">);</span> -<span id="L444" class="LineNr">444 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> -<span id="L445" class="LineNr">445 </span><span class="Delimiter">}</span> -<span id="L446" class="LineNr">446 </span> -<span id="L447" class="LineNr">447 </span><span class="SalientComment">//:: pop</span> -<span id="L448" class="LineNr">448 </span> -<span id="L449" class="LineNr">449 </span><span class="Delimiter">:(before "End Initialize Op Names(name)")</span> -<span id="L450" class="LineNr">450 </span><a href='001help.cc.html#L243'>put</a><span class="Delimiter">(</span><a href='010---vm.cc.html#L228'>name</a><span class="Delimiter">,</span> <span class="Constant">"8f"</span><span class="Delimiter">,</span> <span class="Constant">"pop top of stack to rm32"</span><span class="Delimiter">);</span> -<span id="L451" class="LineNr">451 </span> -<span id="L452" class="LineNr">452 </span><span class="Delimiter">:(scenario pop_mem_at_r32)</span> -<span id="L453" class="LineNr">453 </span><span class="Special">% Reg[EAX].i = 0x60;</span> -<span id="L454" class="LineNr">454 </span><span class="Special">% Reg[ESP].u = 0x10;</span> -<span id="L455" class="LineNr">455 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> -<span id="L456" class="LineNr">456 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> -<span id="L457" class="LineNr">457 </span> <span class="Constant">8f</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="Comment"># pop stack into *EAX</span> -<span id="L458" class="LineNr">458 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 000 (pop r/m32) 000 (dest EAX)</span> -<span id="L459" class="LineNr">459 </span>== <span class="Constant">0x10</span> <span class="Comment"># data segment</span> -<span id="L460" class="LineNr">460 </span><span class="Constant">30</span> <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"># 0x30</span> -<span id="L461" class="LineNr">461 </span><span class="traceContains">+run: <a href='013direct_addressing.cc.html#L419'>pop</a> into r/m32</span> -<span id="L462" class="LineNr">462 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> -<span id="L463" class="LineNr">463 </span><span class="traceContains">+run: popping value 0x00000030</span> -<span id="L464" class="LineNr">464 </span><span class="traceContains">+run: incrementing <a href='010---vm.cc.html#L17'>ESP</a> to 0x00000014</span> -<span id="L465" class="LineNr">465 </span> -<span id="L466" class="LineNr">466 </span><span class="Delimiter">:(before "End Single-Byte Opcodes")</span> -<span id="L467" class="LineNr">467 </span><span class="Normal">case</span> <span class="Constant">0x8f</span>: <span class="Delimiter">{</span> <span class="Comment">// pop stack into r/m32</span> -<span id="L468" class="LineNr">468 </span> <span class="Normal">uint8_t</span> modrm = <a href='010---vm.cc.html#L214'>next</a><span class="Delimiter">();</span> -<span id="L469" class="LineNr">469 </span> <span class="Normal">uint8_t</span> <a href='036recommend_labels.cc.html#L54'>subop</a> = <span class="Delimiter">(</span>modrm>><span class="Constant">3</span><span class="Delimiter">)</span>&<span class="Constant">0x7</span><span class="Delimiter">;</span> -<span id="L470" class="LineNr">470 </span> <span class="Normal">switch</span> <span class="Delimiter">(</span><a href='036recommend_labels.cc.html#L54'>subop</a><span class="Delimiter">)</span> <span class="Delimiter">{</span> -<span id="L471" class="LineNr">471 </span> <span class="Normal">case</span> <span class="Constant">0</span>: <span class="Delimiter">{</span> -<span id="L472" class="LineNr">472 </span> <a href='003trace.cc.html#L196'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"pop into r/m32"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> -<span id="L473" class="LineNr">473 </span> <span class="Normal">int32_t</span>* dest = <a href='013direct_addressing.cc.html#L31'>effective_address</a><span class="Delimiter">(</span>modrm<span class="Delimiter">);</span> -<span id="L474" class="LineNr">474 </span> *dest = <a href='013direct_addressing.cc.html#L419'>pop</a><span class="Delimiter">();</span> +<span id="L389" class="LineNr">389 </span><span class="Delimiter">:(scenario copy_r8_to_mem_at_r32)</span> +<span id="L390" class="LineNr">390 </span><span class="Special">% Reg[EBX].i = 0xafafafaf;</span> +<span id="L391" class="LineNr">391 </span><span class="Special">% Reg[EAX].i = 0x60;</span> +<span id="L392" class="LineNr">392 </span>== <span class="Constant">0x1</span> +<span id="L393" class="LineNr">393 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> +<span id="L394" class="LineNr">394 </span> <span class="Constant">88</span> <span class="Constant">18</span> <span class="Comment"># copy just the lowermost byte of EBX to the byte at *EAX</span> +<span id="L395" class="LineNr">395 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 011 (src EBX) 000 (dest EAX)</span> +<span id="L396" class="LineNr">396 </span><span class="traceContains">+run: copy lowermost byte of <a href='010---vm.cc.html#L16'>EBX</a> to r8/m8-at-r32</span> +<span id="L397" class="LineNr">397 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> +<span id="L398" class="LineNr">398 </span><span class="traceContains">+run: storing 0xaf</span> +<span id="L399" class="LineNr">399 </span><span class="Special">% CHECK_EQ(0x000000af, read_mem_u32(0x60));</span> +<span id="L400" class="LineNr">400 </span> +<span id="L401" class="LineNr">401 </span><span class="Delimiter">:(before "End Single-Byte Opcodes")</span> +<span id="L402" class="LineNr">402 </span><span class="Normal">case</span> <span class="Constant">0x88</span>: <span class="Delimiter">{</span> <span class="Comment">// copy r/m8 to r8</span> +<span id="L403" class="LineNr">403 </span> <span class="Normal">uint8_t</span> modrm = <a href='010---vm.cc.html#L214'>next</a><span class="Delimiter">();</span> +<span id="L404" class="LineNr">404 </span> <span class="Normal">uint8_t</span> reg2 = <span class="Delimiter">(</span>modrm>><span class="Constant">3</span><span class="Delimiter">)</span>&<span class="Constant">0x7</span><span class="Delimiter">;</span> +<span id="L405" class="LineNr">405 </span> <a href='003trace.cc.html#L196'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"copy lowermost byte of "</span> << <a href='013direct_addressing.cc.html#L50'>rname</a><span class="Delimiter">(</span>reg2<span class="Delimiter">)</span> << <span class="Constant">" to r8/m8-at-r32"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> +<span id="L406" class="LineNr">406 </span> <span class="Comment">// use unsigned to zero-extend 8-bit value to 32 bits</span> +<span id="L407" class="LineNr">407 </span> <span class="Normal">uint8_t</span>* arg1 = <span class="Normal">reinterpret_cast</span><<span class="Normal">uint8_t</span>*><span class="Delimiter">(</span><a href='013direct_addressing.cc.html#L31'>effective_address</a><span class="Delimiter">(</span>modrm<span class="Delimiter">));</span> +<span id="L408" class="LineNr">408 </span> *arg1 = Reg[reg2]<span class="Delimiter">.</span>u<span class="Delimiter">;</span> +<span id="L409" class="LineNr">409 </span> <a href='003trace.cc.html#L196'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"storing 0x"</span> << <a href='010---vm.cc.html#L259'>HEXBYTE</a> << <a href='010---vm.cc.html#L262'>NUM</a><span class="Delimiter">(</span>*arg1<span class="Delimiter">)</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> +<span id="L410" class="LineNr">410 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> +<span id="L411" class="LineNr">411 </span><span class="Delimiter">}</span> +<span id="L412" class="LineNr">412 </span> +<span id="L413" class="LineNr">413 </span><span class="Comment">//:</span> +<span id="L414" class="LineNr">414 </span> +<span id="L415" class="LineNr">415 </span><span class="Delimiter">:(before "End Initialize Op Names(name)")</span> +<span id="L416" class="LineNr">416 </span><a href='001help.cc.html#L243'>put</a><span class="Delimiter">(</span><a href='010---vm.cc.html#L228'>name</a><span class="Delimiter">,</span> <span class="Constant">"8a"</span><span class="Delimiter">,</span> <span class="Constant">"copy r8/m8-at-r32 to r8 (lowermost byte of r32)"</span><span class="Delimiter">);</span> +<span id="L417" class="LineNr">417 </span> +<span id="L418" class="LineNr">418 </span><span class="Delimiter">:(scenario copy_mem_at_r32_to_r8)</span> +<span id="L419" class="LineNr">419 </span><span class="Special">% Reg[EBX].i = 0xaf;</span> +<span id="L420" class="LineNr">420 </span><span class="Special">% Reg[EAX].i = 0x60;</span> +<span id="L421" class="LineNr">421 </span>== <span class="Constant">0x1</span> +<span id="L422" class="LineNr">422 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> +<span id="L423" class="LineNr">423 </span> 8a <span class="Constant">18</span> <span class="Comment"># copy just the byte at *EAX to lowermost byte of EBX (clearing remaining bytes)</span> +<span id="L424" class="LineNr">424 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 011 (dest EBX) 000 (src EAX)</span> +<span id="L425" class="LineNr">425 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> +<span id="L426" class="LineNr">426 </span>af ff ff ff <span class="Comment"># 0xaf with more data in following bytes</span> +<span id="L427" class="LineNr">427 </span><span class="traceContains">+run: copy r8/m8-at-r32 to lowermost byte of <a href='010---vm.cc.html#L16'>EBX</a></span> +<span id="L428" class="LineNr">428 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> +<span id="L429" class="LineNr">429 </span><span class="traceContains">+run: storing 0xaf</span> +<span id="L430" class="LineNr">430 </span> +<span id="L431" class="LineNr">431 </span><span class="Delimiter">:(before "End Single-Byte Opcodes")</span> +<span id="L432" class="LineNr">432 </span><span class="Normal">case</span> <span class="Constant">0x8a</span>: <span class="Delimiter">{</span> <span class="Comment">// copy r/m8 to r8</span> +<span id="L433" class="LineNr">433 </span> <span class="Normal">uint8_t</span> modrm = <a href='010---vm.cc.html#L214'>next</a><span class="Delimiter">();</span> +<span id="L434" class="LineNr">434 </span> <span class="Normal">uint8_t</span> reg1 = <span class="Delimiter">(</span>modrm>><span class="Constant">3</span><span class="Delimiter">)</span>&<span class="Constant">0x7</span><span class="Delimiter">;</span> +<span id="L435" class="LineNr">435 </span> <a href='003trace.cc.html#L196'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"copy r8/m8-at-r32 to lowermost byte of "</span> << <a href='013direct_addressing.cc.html#L50'>rname</a><span class="Delimiter">(</span>reg1<span class="Delimiter">)</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> +<span id="L436" class="LineNr">436 </span> <span class="Comment">// use unsigned to zero-extend 8-bit value to 32 bits</span> +<span id="L437" class="LineNr">437 </span> <span class="Normal">uint8_t</span>* arg2 = <span class="Normal">reinterpret_cast</span><<span class="Normal">uint8_t</span>*><span class="Delimiter">(</span><a href='013direct_addressing.cc.html#L31'>effective_address</a><span class="Delimiter">(</span>modrm<span class="Delimiter">));</span> +<span id="L438" class="LineNr">438 </span> Reg[reg1]<span class="Delimiter">.</span>u = <span class="Normal">static_cast</span><<span class="Normal">uint32_t</span>><span class="Delimiter">(</span>*arg2<span class="Delimiter">);</span> +<span id="L439" class="LineNr">439 </span> <a href='003trace.cc.html#L196'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"storing 0x"</span> << <a href='010---vm.cc.html#L259'>HEXBYTE</a> << <a href='010---vm.cc.html#L262'>NUM</a><span class="Delimiter">(</span>*arg2<span class="Delimiter">)</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> +<span id="L440" class="LineNr">440 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> +<span id="L441" class="LineNr">441 </span><span class="Delimiter">}</span> +<span id="L442" class="LineNr">442 </span> +<span id="L443" class="LineNr">443 </span><span class="SalientComment">//:: jump</span> +<span id="L444" class="LineNr">444 </span> +<span id="L445" class="LineNr">445 </span><span class="Delimiter">:(before "End Initialize Op Names(name)")</span> +<span id="L446" class="LineNr">446 </span><a href='001help.cc.html#L243'>put</a><span class="Delimiter">(</span><a href='010---vm.cc.html#L228'>name</a><span class="Delimiter">,</span> <span class="Constant">"ff"</span><span class="Delimiter">,</span> <span class="Constant">"jump/push/call rm32 based on subop"</span><span class="Delimiter">);</span> +<span id="L447" class="LineNr">447 </span> +<span id="L448" class="LineNr">448 </span><span class="Delimiter">:(scenario jump_mem_at_r32)</span> +<span id="L449" class="LineNr">449 </span><span class="Special">% Reg[EAX].i = 0x60;</span> +<span id="L450" class="LineNr">450 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> +<span id="L451" class="LineNr">451 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> +<span id="L452" class="LineNr">452 </span> ff <span class="Constant">20</span> <span class="Comment"># jump to *EAX</span> +<span id="L453" class="LineNr">453 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 100 (jump to r/m32) 000 (src EAX)</span> +<span id="L454" class="LineNr">454 </span> <span class="PreProc">0</span><span class="Constant">5</span> <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="PreProc">0</span><span class="Constant">1</span> +<span id="L455" class="LineNr">455 </span> <span class="PreProc">0</span><span class="Constant">5</span> <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="PreProc">0</span><span class="Constant">2</span> +<span id="L456" class="LineNr">456 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> +<span id="L457" class="LineNr">457 </span><span class="Error">08</span> <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"># 8</span> +<span id="L458" class="LineNr">458 </span><span class="traceContains">+run: inst: 0x00000001</span> +<span id="L459" class="LineNr">459 </span><span class="traceContains">+run: jump to r/m32</span> +<span id="L460" class="LineNr">460 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> +<span id="L461" class="LineNr">461 </span><span class="traceContains">+run: jumping to 0x00000008</span> +<span id="L462" class="LineNr">462 </span><span class="traceContains">+run: inst: 0x00000008</span> +<span id="L463" class="LineNr">463 </span><span class="traceAbsent">-run: inst: 0x00000003</span> +<span id="L464" class="LineNr">464 </span> +<span id="L465" class="LineNr">465 </span><span class="Delimiter">:(before "End Single-Byte Opcodes")</span> +<span id="L466" class="LineNr">466 </span><span class="Normal">case</span> <span class="Constant">0xff</span>: <span class="Delimiter">{</span> +<span id="L467" class="LineNr">467 </span> <span class="Normal">uint8_t</span> modrm = <a href='010---vm.cc.html#L214'>next</a><span class="Delimiter">();</span> +<span id="L468" class="LineNr">468 </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="L469" class="LineNr">469 </span> <span class="Normal">switch</span> <span class="Delimiter">(</span>subop<span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span id="L470" class="LineNr">470 </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="L471" class="LineNr">471 </span> <a href='003trace.cc.html#L196'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"jump to r/m32"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> +<span id="L472" class="LineNr">472 </span> <span class="Normal">int32_t</span>* arg2 = <a href='013direct_addressing.cc.html#L31'>effective_address</a><span class="Delimiter">(</span>modrm<span class="Delimiter">);</span> +<span id="L473" class="LineNr">473 </span> <a href='010---vm.cc.html#L29'>EIP</a> = *arg2<span class="Delimiter">;</span> +<span id="L474" class="LineNr">474 </span> <a href='003trace.cc.html#L196'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"jumping to 0x"</span> << <a href='010---vm.cc.html#L260'>HEXWORD</a> << <a href='010---vm.cc.html#L29'>EIP</a> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> <span id="L475" class="LineNr">475 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> <span id="L476" class="LineNr">476 </span> <span class="Delimiter">}</span> -<span id="L477" class="LineNr">477 </span> <span class="Delimiter">}</span> -<span id="L478" class="LineNr">478 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> -<span id="L479" class="LineNr">479 </span><span class="Delimiter">}</span> -<span id="L480" class="LineNr">480 </span> -<span id="L481" class="LineNr">481 </span><span class="SalientComment">//:: special-case for loading address from disp32 rather than register</span> -<span id="L482" class="LineNr">482 </span> -<span id="L483" class="LineNr">483 </span><span class="Delimiter">:(scenario add_r32_to_mem_at_displacement)</span> -<span id="L484" class="LineNr">484 </span><span class="Special">% Reg[EBX].i = 0x10; // source</span> -<span id="L485" class="LineNr">485 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> -<span id="L486" class="LineNr">486 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> -<span id="L487" class="LineNr">487 </span> <span class="PreProc">0</span><span class="Constant">1</span> 1d <span class="Constant">60</span> <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"># add EBX to *0x60</span> -<span id="L488" class="LineNr">488 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 011 (src EBX) 101 (dest in disp32)</span> -<span id="L489" class="LineNr">489 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> -<span id="L490" class="LineNr">490 </span><span class="PreProc">0</span><span class="Constant">1</span> <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"># 1</span> -<span id="L491" class="LineNr">491 </span><span class="traceContains">+run: add <a href='010---vm.cc.html#L16'>EBX</a> to r/m32</span> -<span id="L492" class="LineNr">492 </span><span class="traceContains">+run: effective address is 0x60 (disp32)</span> -<span id="L493" class="LineNr">493 </span><span class="traceContains">+run: storing 0x00000011</span> -<span id="L494" class="LineNr">494 </span> -<span id="L495" class="LineNr">495 </span><span class="Delimiter">:(before "End Mod 0 Special-cases(addr)")</span> -<span id="L496" class="LineNr">496 </span><span class="Normal">case</span> <span class="Constant">5</span>: <span class="Comment">// exception: mod 0b00 rm 0b101 => incoming disp32</span> -<span id="L497" class="LineNr">497 </span> addr = <a href='011run.cc.html#L292'>imm32</a><span class="Delimiter">();</span> -<span id="L498" class="LineNr">498 </span> <a href='003trace.cc.html#L196'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"effective address is 0x"</span> << std::hex << addr << <span class="Constant">" (disp32)"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> -<span id="L499" class="LineNr">499 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> -<span id="L500" class="LineNr">500 </span> -<span id="L501" class="LineNr">501 </span><span class="Comment">//:</span> -<span id="L502" class="LineNr">502 </span> -<span id="L503" class="LineNr">503 </span><span class="Delimiter">:(scenario add_r32_to_mem_at_r32_plus_disp8)</span> -<span id="L504" class="LineNr">504 </span><span class="Special">% Reg[EBX].i = 0x10; // source</span> -<span id="L505" class="LineNr">505 </span><span class="Special">% Reg[EAX].i = 0x5e; // dest</span> -<span id="L506" class="LineNr">506 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> -<span id="L507" class="LineNr">507 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> -<span id="L508" class="LineNr">508 </span> <span class="PreProc">0</span><span class="Constant">1</span> <span class="Constant">58</span> <span class="PreProc">0</span><span class="Constant">2</span> <span class="Comment"># add EBX to *(EAX+2)</span> -<span id="L509" class="LineNr">509 </span><span class="Comment"># ModR/M in binary: 01 (indirect+disp8 mode) 011 (src EBX) 000 (dest EAX)</span> -<span id="L510" class="LineNr">510 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> -<span id="L511" class="LineNr">511 </span><span class="PreProc">0</span><span class="Constant">1</span> <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"># 1</span> -<span id="L512" class="LineNr">512 </span><span class="traceContains">+run: add <a href='010---vm.cc.html#L16'>EBX</a> to r/m32</span> -<span id="L513" class="LineNr">513 </span><span class="traceContains">+run: effective address is initially 0x5e (EAX)</span> -<span id="L514" class="LineNr">514 </span><span class="traceContains">+run: effective address is 0x60 (after adding disp8)</span> -<span id="L515" class="LineNr">515 </span><span class="traceContains">+run: storing 0x00000011</span> -<span id="L516" class="LineNr">516 </span> -<span id="L517" class="LineNr">517 </span><span class="Delimiter">:(before "End Mod Special-cases(addr)")</span> -<span id="L518" class="LineNr">518 </span><span class="Normal">case</span> <span class="Constant">1</span>: <span class="Comment">// indirect + disp8 addressing</span> -<span id="L519" class="LineNr">519 </span> <span class="Normal">switch</span> <span class="Delimiter">(</span>rm<span class="Delimiter">)</span> <span class="Delimiter">{</span> -<span id="L520" class="LineNr">520 </span> <span class="Normal">default</span>: -<span id="L521" class="LineNr">521 </span> addr = Reg[rm]<span class="Delimiter">.</span>u<span class="Delimiter">;</span> -<span id="L522" class="LineNr">522 </span> <a href='003trace.cc.html#L196'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"effective address is initially 0x"</span> << std::hex << addr << <span class="Constant">" ("</span> << <a href='013direct_addressing.cc.html#L50'>rname</a><span class="Delimiter">(</span>rm<span class="Delimiter">)</span> << <span class="Constant">")"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> -<span id="L523" class="LineNr">523 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> -<span id="L524" class="LineNr">524 </span> <span class="Comment">// End Mod 1 Special-cases(addr)</span> -<span id="L525" class="LineNr">525 </span> <span class="Delimiter">}</span> -<span id="L526" class="LineNr">526 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>addr > <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> -<span id="L527" class="LineNr">527 </span> addr += <span class="Normal">static_cast</span><<span class="Normal">int8_t</span>><span class="Delimiter">(</span><a href='010---vm.cc.html#L214'>next</a><span class="Delimiter">());</span> -<span id="L528" class="LineNr">528 </span> <a href='003trace.cc.html#L196'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"effective address is 0x"</span> << std::hex << addr << <span class="Constant">" (after adding disp8)"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> -<span id="L529" class="LineNr">529 </span> <span class="Delimiter">}</span> -<span id="L530" class="LineNr">530 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> -<span id="L531" class="LineNr">531 </span> -<span id="L532" class="LineNr">532 </span><span class="Delimiter">:(scenario add_r32_to_mem_at_r32_plus_negative_disp8)</span> -<span id="L533" class="LineNr">533 </span><span class="Special">% Reg[EBX].i = 0x10; // source</span> -<span id="L534" class="LineNr">534 </span><span class="Special">% Reg[EAX].i = 0x61; // dest</span> -<span id="L535" class="LineNr">535 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> -<span id="L536" class="LineNr">536 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> -<span id="L537" class="LineNr">537 </span> <span class="PreProc">0</span><span class="Constant">1</span> <span class="Constant">58</span> ff <span class="Comment"># add EBX to *(EAX-1)</span> -<span id="L538" class="LineNr">538 </span><span class="Comment"># ModR/M in binary: 01 (indirect+disp8 mode) 011 (src EBX) 000 (dest EAX)</span> -<span id="L539" class="LineNr">539 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> -<span id="L540" class="LineNr">540 </span><span class="PreProc">0</span><span class="Constant">1</span> <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"># 1</span> -<span id="L541" class="LineNr">541 </span><span class="traceContains">+run: add <a href='010---vm.cc.html#L16'>EBX</a> to r/m32</span> -<span id="L542" class="LineNr">542 </span><span class="traceContains">+run: effective address is initially 0x61 (EAX)</span> -<span id="L543" class="LineNr">543 </span><span class="traceContains">+run: effective address is 0x60 (after adding disp8)</span> -<span id="L544" class="LineNr">544 </span><span class="traceContains">+run: storing 0x00000011</span> -<span id="L545" class="LineNr">545 </span> -<span id="L546" class="LineNr">546 </span><span class="Comment">//:</span> -<span id="L547" class="LineNr">547 </span> -<span id="L548" class="LineNr">548 </span><span class="Delimiter">:(scenario add_r32_to_mem_at_r32_plus_disp32)</span> -<span id="L549" class="LineNr">549 </span><span class="Special">% Reg[EBX].i = 0x10; // source</span> -<span id="L550" class="LineNr">550 </span><span class="Special">% Reg[EAX].i = 0x5e; // dest</span> -<span id="L551" class="LineNr">551 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> -<span id="L552" class="LineNr">552 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> -<span id="L553" class="LineNr">553 </span> <span class="PreProc">0</span><span class="Constant">1</span> <span class="Constant">98</span> <span class="PreProc">0</span><span class="Constant">2</span> <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"># add EBX to *(EAX+2)</span> -<span id="L554" class="LineNr">554 </span><span class="Comment"># ModR/M in binary: 10 (indirect+disp32 mode) 011 (src EBX) 000 (dest EAX)</span> -<span id="L555" class="LineNr">555 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> -<span id="L556" class="LineNr">556 </span><span class="PreProc">0</span><span class="Constant">1</span> <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"># 1</span> -<span id="L557" class="LineNr">557 </span><span class="traceContains">+run: add <a href='010---vm.cc.html#L16'>EBX</a> to r/m32</span> -<span id="L558" class="LineNr">558 </span><span class="traceContains">+run: effective address is initially 0x5e (EAX)</span> -<span id="L559" class="LineNr">559 </span><span class="traceContains">+run: effective address is 0x60 (after adding disp32)</span> -<span id="L560" class="LineNr">560 </span><span class="traceContains">+run: storing 0x00000011</span> +<span id="L477" class="LineNr">477 </span> <span class="Comment">// End Op ff Subops</span> +<span id="L478" class="LineNr">478 </span> <span class="Delimiter">}</span> +<span id="L479" class="LineNr">479 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> +<span id="L480" class="LineNr">480 </span><span class="Delimiter">}</span> +<span id="L481" class="LineNr">481 </span> +<span id="L482" class="LineNr">482 </span><span class="SalientComment">//:: push</span> +<span id="L483" class="LineNr">483 </span> +<span id="L484" class="LineNr">484 </span><span class="Delimiter">:(scenario push_mem_at_r32)</span> +<span id="L485" class="LineNr">485 </span><span class="Special">% Reg[EAX].i = 0x60;</span> +<span id="L486" class="LineNr">486 </span><span class="Special">% Reg[ESP].u = 0x14;</span> +<span id="L487" class="LineNr">487 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> +<span id="L488" class="LineNr">488 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> +<span id="L489" class="LineNr">489 </span> ff <span class="Constant">30</span> <span class="Comment"># push *EAX to stack</span> +<span id="L490" class="LineNr">490 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 110 (push r/m32) 000 (src EAX)</span> +<span id="L491" class="LineNr">491 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> +<span id="L492" class="LineNr">492 </span>af <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"># 0xaf</span> +<span id="L493" class="LineNr">493 </span><span class="traceContains">+run: <a href='012elf.cc.html#L85'>push</a> r/m32</span> +<span id="L494" class="LineNr">494 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> +<span id="L495" class="LineNr">495 </span><span class="traceContains">+run: decrementing <a href='010---vm.cc.html#L17'>ESP</a> to 0x00000010</span> +<span id="L496" class="LineNr">496 </span><span class="traceContains">+run: pushing value 0x000000af</span> +<span id="L497" class="LineNr">497 </span> +<span id="L498" class="LineNr">498 </span><span class="Delimiter">:(before "End Op ff Subops")</span> +<span id="L499" class="LineNr">499 </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="L500" class="LineNr">500 </span> <a href='003trace.cc.html#L196'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"push r/m32"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> +<span id="L501" class="LineNr">501 </span> <span class="Normal">const</span> <span class="Normal">int32_t</span>* val = <a href='013direct_addressing.cc.html#L31'>effective_address</a><span class="Delimiter">(</span>modrm<span class="Delimiter">);</span> +<span id="L502" class="LineNr">502 </span> <a href='012elf.cc.html#L85'>push</a><span class="Delimiter">(</span>*val<span class="Delimiter">);</span> +<span id="L503" class="LineNr">503 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> +<span id="L504" class="LineNr">504 </span><span class="Delimiter">}</span> +<span id="L505" class="LineNr">505 </span> +<span id="L506" class="LineNr">506 </span><span class="SalientComment">//:: pop</span> +<span id="L507" class="LineNr">507 </span> +<span id="L508" class="LineNr">508 </span><span class="Delimiter">:(before "End Initialize Op Names(name)")</span> +<span id="L509" class="LineNr">509 </span><a href='001help.cc.html#L243'>put</a><span class="Delimiter">(</span><a href='010---vm.cc.html#L228'>name</a><span class="Delimiter">,</span> <span class="Constant">"8f"</span><span class="Delimiter">,</span> <span class="Constant">"pop top of stack to rm32"</span><span class="Delimiter">);</span> +<span id="L510" class="LineNr">510 </span> +<span id="L511" class="LineNr">511 </span><span class="Delimiter">:(scenario pop_mem_at_r32)</span> +<span id="L512" class="LineNr">512 </span><span class="Special">% Reg[EAX].i = 0x60;</span> +<span id="L513" class="LineNr">513 </span><span class="Special">% Reg[ESP].u = 0x10;</span> +<span id="L514" class="LineNr">514 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> +<span id="L515" class="LineNr">515 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> +<span id="L516" class="LineNr">516 </span> <span class="Constant">8f</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="Comment"># pop stack into *EAX</span> +<span id="L517" class="LineNr">517 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 000 (pop r/m32) 000 (dest EAX)</span> +<span id="L518" class="LineNr">518 </span>== <span class="Constant">0x10</span> <span class="Comment"># data segment</span> +<span id="L519" class="LineNr">519 </span><span class="Constant">30</span> <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"># 0x30</span> +<span id="L520" class="LineNr">520 </span><span class="traceContains">+run: <a href='013direct_addressing.cc.html#L412'>pop</a> into r/m32</span> +<span id="L521" class="LineNr">521 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> +<span id="L522" class="LineNr">522 </span><span class="traceContains">+run: popping value 0x00000030</span> +<span id="L523" class="LineNr">523 </span><span class="traceContains">+run: incrementing <a href='010---vm.cc.html#L17'>ESP</a> to 0x00000014</span> +<span id="L524" class="LineNr">524 </span> +<span id="L525" class="LineNr">525 </span><span class="Delimiter">:(before "End Single-Byte Opcodes")</span> +<span id="L526" class="LineNr">526 </span><span class="Normal">case</span> <span class="Constant">0x8f</span>: <span class="Delimiter">{</span> <span class="Comment">// pop stack into r/m32</span> +<span id="L527" class="LineNr">527 </span> <span class="Normal">uint8_t</span> modrm = <a href='010---vm.cc.html#L214'>next</a><span class="Delimiter">();</span> +<span id="L528" class="LineNr">528 </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 id="L529" class="LineNr">529 </span> <span class="Normal">switch</span> <span class="Delimiter">(</span>subop<span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span id="L530" class="LineNr">530 </span> <span class="Normal">case</span> <span class="Constant">0</span>: <span class="Delimiter">{</span> +<span id="L531" class="LineNr">531 </span> <a href='003trace.cc.html#L196'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"pop into r/m32"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> +<span id="L532" class="LineNr">532 </span> <span class="Normal">int32_t</span>* dest = <a href='013direct_addressing.cc.html#L31'>effective_address</a><span class="Delimiter">(</span>modrm<span class="Delimiter">);</span> +<span id="L533" class="LineNr">533 </span> *dest = <a href='013direct_addressing.cc.html#L412'>pop</a><span class="Delimiter">();</span> +<span id="L534" class="LineNr">534 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> +<span id="L535" class="LineNr">535 </span> <span class="Delimiter">}</span> +<span id="L536" class="LineNr">536 </span> <span class="Delimiter">}</span> +<span id="L537" class="LineNr">537 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> +<span id="L538" class="LineNr">538 </span><span class="Delimiter">}</span> +<span id="L539" class="LineNr">539 </span> +<span id="L540" class="LineNr">540 </span><span class="SalientComment">//:: special-case for loading address from disp32 rather than register</span> +<span id="L541" class="LineNr">541 </span> +<span id="L542" class="LineNr">542 </span><span class="Delimiter">:(scenario add_r32_to_mem_at_displacement)</span> +<span id="L543" class="LineNr">543 </span><span class="Special">% Reg[EBX].i = 0x10; // source</span> +<span id="L544" class="LineNr">544 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> +<span id="L545" class="LineNr">545 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> +<span id="L546" class="LineNr">546 </span> <span class="PreProc">0</span><span class="Constant">1</span> 1d <span class="Constant">60</span> <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"># add EBX to *0x60</span> +<span id="L547" class="LineNr">547 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 011 (src EBX) 101 (dest in disp32)</span> +<span id="L548" class="LineNr">548 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> +<span id="L549" class="LineNr">549 </span><span class="PreProc">0</span><span class="Constant">1</span> <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"># 1</span> +<span id="L550" class="LineNr">550 </span><span class="traceContains">+run: add <a href='010---vm.cc.html#L16'>EBX</a> to r/m32</span> +<span id="L551" class="LineNr">551 </span><span class="traceContains">+run: effective address is 0x60 (disp32)</span> +<span id="L552" class="LineNr">552 </span><span class="traceContains">+run: storing 0x00000011</span> +<span id="L553" class="LineNr">553 </span> +<span id="L554" class="LineNr">554 </span><span class="Delimiter">:(before "End Mod 0 Special-cases(addr)")</span> +<span id="L555" class="LineNr">555 </span><span class="Normal">case</span> <span class="Constant">5</span>: <span class="Comment">// exception: mod 0b00 rm 0b101 => incoming disp32</span> +<span id="L556" class="LineNr">556 </span> addr = <a href='011run.cc.html#L299'>imm32</a><span class="Delimiter">();</span> +<span id="L557" class="LineNr">557 </span> <a href='003trace.cc.html#L196'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"effective address is 0x"</span> << std::hex << addr << <span class="Constant">" (disp32)"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> +<span id="L558" class="LineNr">558 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> +<span id="L559" class="LineNr">559 </span> +<span id="L560" class="LineNr">560 </span><span class="Comment">//:</span> <span id="L561" class="LineNr">561 </span> -<span id="L562" class="LineNr">562 </span><span class="Delimiter">:(before "End Mod Special-cases(addr)")</span> -<span id="L563" class="LineNr">563 </span><span class="Normal">case</span> <span class="Constant">2</span>: <span class="Comment">// indirect + disp32 addressing</span> -<span id="L564" class="LineNr">564 </span> <span class="Normal">switch</span> <span class="Delimiter">(</span>rm<span class="Delimiter">)</span> <span class="Delimiter">{</span> -<span id="L565" class="LineNr">565 </span> <span class="Normal">default</span>: -<span id="L566" class="LineNr">566 </span> addr = Reg[rm]<span class="Delimiter">.</span>u<span class="Delimiter">;</span> -<span id="L567" class="LineNr">567 </span> <a href='003trace.cc.html#L196'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"effective address is initially 0x"</span> << std::hex << addr << <span class="Constant">" ("</span> << <a href='013direct_addressing.cc.html#L50'>rname</a><span class="Delimiter">(</span>rm<span class="Delimiter">)</span> << <span class="Constant">")"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> -<span id="L568" class="LineNr">568 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> -<span id="L569" class="LineNr">569 </span> <span class="Comment">// End Mod 2 Special-cases(addr)</span> -<span id="L570" class="LineNr">570 </span> <span class="Delimiter">}</span> -<span id="L571" class="LineNr">571 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>addr > <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> -<span id="L572" class="LineNr">572 </span> addr += <a href='011run.cc.html#L292'>imm32</a><span class="Delimiter">();</span> -<span id="L573" class="LineNr">573 </span> <a href='003trace.cc.html#L196'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"effective address is 0x"</span> << std::hex << addr << <span class="Constant">" (after adding disp32)"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> -<span id="L574" class="LineNr">574 </span> <span class="Delimiter">}</span> -<span id="L575" class="LineNr">575 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> -<span id="L576" class="LineNr">576 </span> -<span id="L577" class="LineNr">577 </span><span class="Delimiter">:(scenario add_r32_to_mem_at_r32_plus_negative_disp32)</span> -<span id="L578" class="LineNr">578 </span><span class="Special">% Reg[EBX].i = 0x10; // source</span> -<span id="L579" class="LineNr">579 </span><span class="Special">% Reg[EAX].i = 0x61; // dest</span> -<span id="L580" class="LineNr">580 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> -<span id="L581" class="LineNr">581 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> -<span id="L582" class="LineNr">582 </span> <span class="PreProc">0</span><span class="Constant">1</span> <span class="Constant">98</span> ff ff ff ff <span class="Comment"># add EBX to *(EAX-1)</span> -<span id="L583" class="LineNr">583 </span><span class="Comment"># ModR/M in binary: 10 (indirect+disp32 mode) 011 (src EBX) 000 (dest EAX)</span> -<span id="L584" class="LineNr">584 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> -<span id="L585" class="LineNr">585 </span><span class="PreProc">0</span><span class="Constant">1</span> <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"># 1</span> -<span id="L586" class="LineNr">586 </span><span class="traceContains">+run: add <a href='010---vm.cc.html#L16'>EBX</a> to r/m32</span> -<span id="L587" class="LineNr">587 </span><span class="traceContains">+run: effective address is initially 0x61 (EAX)</span> -<span id="L588" class="LineNr">588 </span><span class="traceContains">+run: effective address is 0x60 (after adding disp32)</span> -<span id="L589" class="LineNr">589 </span><span class="traceContains">+run: storing 0x00000011</span> +<span id="L562" class="LineNr">562 </span><span class="Delimiter">:(scenario add_r32_to_mem_at_r32_plus_disp8)</span> +<span id="L563" class="LineNr">563 </span><span class="Special">% Reg[EBX].i = 0x10; // source</span> +<span id="L564" class="LineNr">564 </span><span class="Special">% Reg[EAX].i = 0x5e; // dest</span> +<span id="L565" class="LineNr">565 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> +<span id="L566" class="LineNr">566 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> +<span id="L567" class="LineNr">567 </span> <span class="PreProc">0</span><span class="Constant">1</span> <span class="Constant">58</span> <span class="PreProc">0</span><span class="Constant">2</span> <span class="Comment"># add EBX to *(EAX+2)</span> +<span id="L568" class="LineNr">568 </span><span class="Comment"># ModR/M in binary: 01 (indirect+disp8 mode) 011 (src EBX) 000 (dest EAX)</span> +<span id="L569" class="LineNr">569 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> +<span id="L570" class="LineNr">570 </span><span class="PreProc">0</span><span class="Constant">1</span> <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"># 1</span> +<span id="L571" class="LineNr">571 </span><span class="traceContains">+run: add <a href='010---vm.cc.html#L16'>EBX</a> to r/m32</span> +<span id="L572" class="LineNr">572 </span><span class="traceContains">+run: effective address is initially 0x5e (EAX)</span> +<span id="L573" class="LineNr">573 </span><span class="traceContains">+run: effective address is 0x60 (after adding disp8)</span> +<span id="L574" class="LineNr">574 </span><span class="traceContains">+run: storing 0x00000011</span> +<span id="L575" class="LineNr">575 </span> +<span id="L576" class="LineNr">576 </span><span class="Delimiter">:(before "End Mod Special-cases(addr)")</span> +<span id="L577" class="LineNr">577 </span><span class="Normal">case</span> <span class="Constant">1</span>: <span class="Comment">// indirect + disp8 addressing</span> +<span id="L578" class="LineNr">578 </span> <span class="Normal">switch</span> <span class="Delimiter">(</span>rm<span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span id="L579" class="LineNr">579 </span> <span class="Normal">default</span>: +<span id="L580" class="LineNr">580 </span> addr = Reg[rm]<span class="Delimiter">.</span>u<span class="Delimiter">;</span> +<span id="L581" class="LineNr">581 </span> <a href='003trace.cc.html#L196'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"effective address is initially 0x"</span> << std::hex << addr << <span class="Constant">" ("</span> << <a href='013direct_addressing.cc.html#L50'>rname</a><span class="Delimiter">(</span>rm<span class="Delimiter">)</span> << <span class="Constant">")"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> +<span id="L582" class="LineNr">582 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> +<span id="L583" class="LineNr">583 </span> <span class="Comment">// End Mod 1 Special-cases(addr)</span> +<span id="L584" class="LineNr">584 </span> <span class="Delimiter">}</span> +<span id="L585" class="LineNr">585 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>addr > <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span id="L586" class="LineNr">586 </span> addr += <span class="Normal">static_cast</span><<span class="Normal">int8_t</span>><span class="Delimiter">(</span><a href='010---vm.cc.html#L214'>next</a><span class="Delimiter">());</span> +<span id="L587" class="LineNr">587 </span> <a href='003trace.cc.html#L196'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"effective address is 0x"</span> << std::hex << addr << <span class="Constant">" (after adding disp8)"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> +<span id="L588" class="LineNr">588 </span> <span class="Delimiter">}</span> +<span id="L589" class="LineNr">589 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> +<span id="L590" class="LineNr">590 </span> +<span id="L591" class="LineNr">591 </span><span class="Delimiter">:(scenario add_r32_to_mem_at_r32_plus_negative_disp8)</span> +<span id="L592" class="LineNr">592 </span><span class="Special">% Reg[EBX].i = 0x10; // source</span> +<span id="L593" class="LineNr">593 </span><span class="Special">% Reg[EAX].i = 0x61; // dest</span> +<span id="L594" class="LineNr">594 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> +<span id="L595" class="LineNr">595 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> +<span id="L596" class="LineNr">596 </span> <span class="PreProc">0</span><span class="Constant">1</span> <span class="Constant">58</span> ff <span class="Comment"># add EBX to *(EAX-1)</span> +<span id="L597" class="LineNr">597 </span><span class="Comment"># ModR/M in binary: 01 (indirect+disp8 mode) 011 (src EBX) 000 (dest EAX)</span> +<span id="L598" class="LineNr">598 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> +<span id="L599" class="LineNr">599 </span><span class="PreProc">0</span><span class="Constant">1</span> <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"># 1</span> +<span id="L600" class="LineNr">600 </span><span class="traceContains">+run: add <a href='010---vm.cc.html#L16'>EBX</a> to r/m32</span> +<span id="L601" class="LineNr">601 </span><span class="traceContains">+run: effective address is initially 0x61 (EAX)</span> +<span id="L602" class="LineNr">602 </span><span class="traceContains">+run: effective address is 0x60 (after adding disp8)</span> +<span id="L603" class="LineNr">603 </span><span class="traceContains">+run: storing 0x00000011</span> +<span id="L604" class="LineNr">604 </span> +<span id="L605" class="LineNr">605 </span><span class="Comment">//:</span> +<span id="L606" class="LineNr">606 </span> +<span id="L607" class="LineNr">607 </span><span class="Delimiter">:(scenario add_r32_to_mem_at_r32_plus_disp32)</span> +<span id="L608" class="LineNr">608 </span><span class="Special">% Reg[EBX].i = 0x10; // source</span> +<span id="L609" class="LineNr">609 </span><span class="Special">% Reg[EAX].i = 0x5e; // dest</span> +<span id="L610" class="LineNr">610 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> +<span id="L611" class="LineNr">611 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> +<span id="L612" class="LineNr">612 </span> <span class="PreProc">0</span><span class="Constant">1</span> <span class="Constant">98</span> <span class="PreProc">0</span><span class="Constant">2</span> <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"># add EBX to *(EAX+2)</span> +<span id="L613" class="LineNr">613 </span><span class="Comment"># ModR/M in binary: 10 (indirect+disp32 mode) 011 (src EBX) 000 (dest EAX)</span> +<span id="L614" class="LineNr">614 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> +<span id="L615" class="LineNr">615 </span><span class="PreProc">0</span><span class="Constant">1</span> <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"># 1</span> +<span id="L616" class="LineNr">616 </span><span class="traceContains">+run: add <a href='010---vm.cc.html#L16'>EBX</a> to r/m32</span> +<span id="L617" class="LineNr">617 </span><span class="traceContains">+run: effective address is initially 0x5e (EAX)</span> +<span id="L618" class="LineNr">618 </span><span class="traceContains">+run: effective address is 0x60 (after adding disp32)</span> +<span id="L619" class="LineNr">619 </span><span class="traceContains">+run: storing 0x00000011</span> +<span id="L620" class="LineNr">620 </span> +<span id="L621" class="LineNr">621 </span><span class="Delimiter">:(before "End Mod Special-cases(addr)")</span> +<span id="L622" class="LineNr">622 </span><span class="Normal">case</span> <span class="Constant">2</span>: <span class="Comment">// indirect + disp32 addressing</span> +<span id="L623" class="LineNr">623 </span> <span class="Normal">switch</span> <span class="Delimiter">(</span>rm<span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span id="L624" class="LineNr">624 </span> <span class="Normal">default</span>: +<span id="L625" class="LineNr">625 </span> addr = Reg[rm]<span class="Delimiter">.</span>u<span class="Delimiter">;</span> +<span id="L626" class="LineNr">626 </span> <a href='003trace.cc.html#L196'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"effective address is initially 0x"</span> << std::hex << addr << <span class="Constant">" ("</span> << <a href='013direct_addressing.cc.html#L50'>rname</a><span class="Delimiter">(</span>rm<span class="Delimiter">)</span> << <span class="Constant">")"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> +<span id="L627" class="LineNr">627 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> +<span id="L628" class="LineNr">628 </span> <span class="Comment">// End Mod 2 Special-cases(addr)</span> +<span id="L629" class="LineNr">629 </span> <span class="Delimiter">}</span> +<span id="L630" class="LineNr">630 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>addr > <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span id="L631" class="LineNr">631 </span> addr += <a href='011run.cc.html#L299'>imm32</a><span class="Delimiter">();</span> +<span id="L632" class="LineNr">632 </span> <a href='003trace.cc.html#L196'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"effective address is 0x"</span> << std::hex << addr << <span class="Constant">" (after adding disp32)"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> +<span id="L633" class="LineNr">633 </span> <span class="Delimiter">}</span> +<span id="L634" class="LineNr">634 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> +<span id="L635" class="LineNr">635 </span> +<span id="L636" class="LineNr">636 </span><span class="Delimiter">:(scenario add_r32_to_mem_at_r32_plus_negative_disp32)</span> +<span id="L637" class="LineNr">637 </span><span class="Special">% Reg[EBX].i = 0x10; // source</span> +<span id="L638" class="LineNr">638 </span><span class="Special">% Reg[EAX].i = 0x61; // dest</span> +<span id="L639" class="LineNr">639 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> +<span id="L640" class="LineNr">640 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> +<span id="L641" class="LineNr">641 </span> <span class="PreProc">0</span><span class="Constant">1</span> <span class="Constant">98</span> ff ff ff ff <span class="Comment"># add EBX to *(EAX-1)</span> +<span id="L642" class="LineNr">642 </span><span class="Comment"># ModR/M in binary: 10 (indirect+disp32 mode) 011 (src EBX) 000 (dest EAX)</span> +<span id="L643" class="LineNr">643 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> +<span id="L644" class="LineNr">644 </span><span class="PreProc">0</span><span class="Constant">1</span> <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"># 1</span> +<span id="L645" class="LineNr">645 </span><span class="traceContains">+run: add <a href='010---vm.cc.html#L16'>EBX</a> to r/m32</span> +<span id="L646" class="LineNr">646 </span><span class="traceContains">+run: effective address is initially 0x61 (EAX)</span> +<span id="L647" class="LineNr">647 </span><span class="traceContains">+run: effective address is 0x60 (after adding disp32)</span> +<span id="L648" class="LineNr">648 </span><span class="traceContains">+run: storing 0x00000011</span> </pre> </body> </html> |