2018-12-03 04:43:39 +00:00
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2019-07-28 01:26:18 +00:00
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<title>Mu - 063error.subx</title>
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2019-07-14 16:42:36 +00:00
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2018-12-03 04:43:39 +00:00
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2018-12-03 04:43:39 +00:00
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2019-07-28 01:26:18 +00:00
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<a href='https://github.com/akkartik/mu/blob/master/063error.subx'>https://github.com/akkartik/mu/blob/master/063error.subx</a>
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2018-12-03 04:43:39 +00:00
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<pre id='vimCodeElement'>
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<span id="L1" class="LineNr"> 1 </span><span class="subxComment"># Print an error message and exit.</span>
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<span id="L2" class="LineNr"> 2 </span>
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<span id="L3" class="LineNr"> 3 </span>== code
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<span id="L4" class="LineNr"> 4 </span><span class="subxComment"># instruction effective address register displacement immediate</span>
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<span id="L5" class="LineNr"> 5 </span><span class="subxS1Comment"># . op subop mod rm32 base index scale r32</span>
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<span id="L6" class="LineNr"> 6 </span><span class="subxS1Comment"># . 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes</span>
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<span id="L7" class="LineNr"> 7 </span>
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2019-02-19 06:43:01 +00:00
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<span id="L8" class="LineNr"> 8 </span><span class="subxComment"># write(out, "Error: "+msg+"\n") then stop(ed, 1)</span>
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2020-01-03 09:36:34 +00:00
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<span id="L9" class="LineNr"> 9 </span><span class="subxFunction">error</span>: <span class="subxComment"># ed : (addr exit-descriptor), out : fd or (addr stream byte), msg : (addr array byte)</span>
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2019-10-18 05:03:35 +00:00
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<span id="L10" class="LineNr">10 </span> <span class="subxS1Comment"># . prologue</span>
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2019-08-26 18:55:26 +00:00
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<span id="L11" class="LineNr">11 </span> 55/push-ebp
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<span id="L12" class="LineNr">12 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
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2019-02-19 06:43:01 +00:00
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<span id="L13" class="LineNr">13 </span> <span class="subxComment"># write(out, "Error: ")</span>
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<span id="L14" class="LineNr">14 </span> <span class="subxS2Comment"># . . push args</span>
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<span id="L15" class="LineNr">15 </span> 68/push <span class="Constant">"Error: "</span>/imm32
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2019-08-26 18:55:26 +00:00
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<span id="L16" class="LineNr">16 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+12)</span>
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2019-02-19 06:43:01 +00:00
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<span id="L17" class="LineNr">17 </span> <span class="subxS2Comment"># . . call</span>
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<span id="L18" class="LineNr">18 </span> e8/call <a href='057write.subx.html#L24'>write</a>/disp32
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<span id="L19" class="LineNr">19 </span> <span class="subxS2Comment"># . . discard args</span>
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2019-08-26 18:55:26 +00:00
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<span id="L20" class="LineNr">20 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
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2019-02-19 06:43:01 +00:00
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<span id="L21" class="LineNr">21 </span> <span class="subxComment"># write(out, msg)</span>
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<span id="L22" class="LineNr">22 </span> <span class="subxS2Comment"># . . push args</span>
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2019-08-26 18:55:26 +00:00
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<span id="L23" class="LineNr">23 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0x10/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+16)</span>
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<span id="L24" class="LineNr">24 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+12)</span>
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<span id="L25" class="LineNr">25 </span> <span class="subxS2Comment"># . . call</span>
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<span id="L26" class="LineNr">26 </span> e8/call <a href='057write.subx.html#L24'>write</a>/disp32
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<span id="L27" class="LineNr">27 </span> <span class="subxS2Comment"># . . discard args</span>
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2019-08-26 18:55:26 +00:00
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<span id="L28" class="LineNr">28 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
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2019-09-20 18:19:30 +00:00
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<span id="L29" class="LineNr">29 </span> <span class="subxComment"># write(out, "\n")</span>
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2019-02-19 06:43:01 +00:00
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<span id="L30" class="LineNr">30 </span> <span class="subxS2Comment"># . . push args</span>
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<span id="L31" class="LineNr">31 </span> 68/push <span class="SpecialChar"><a href='051test.subx.html#L83'>Newline</a></span>/imm32
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2019-08-26 18:55:26 +00:00
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<span id="L32" class="LineNr">32 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+12)</span>
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2019-02-19 06:43:01 +00:00
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<span id="L33" class="LineNr">33 </span> <span class="subxS2Comment"># . . call</span>
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<span id="L34" class="LineNr">34 </span> e8/call <a href='057write.subx.html#L24'>write</a>/disp32
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<span id="L35" class="LineNr">35 </span> <span class="subxS2Comment"># . . discard args</span>
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2019-08-26 18:55:26 +00:00
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<span id="L36" class="LineNr">36 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
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2019-02-19 06:43:01 +00:00
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<span id="L37" class="LineNr">37 </span> <span class="subxComment"># stop(ed, 1)</span>
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<span id="L38" class="LineNr">38 </span> <span class="subxS2Comment"># . . push args</span>
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<span id="L39" class="LineNr">39 </span> 68/push 1/imm32
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2019-08-26 18:55:26 +00:00
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<span id="L40" class="LineNr">40 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+8)</span>
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2019-02-19 06:43:01 +00:00
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<span id="L41" class="LineNr">41 </span> <span class="subxS2Comment"># . . call</span>
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2019-08-25 22:53:24 +00:00
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<span id="L42" class="LineNr">42 </span> e8/call <a href='059stop.subx.html#L92'>stop</a>/disp32
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2019-02-19 06:43:01 +00:00
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<span id="L43" class="LineNr">43 </span> <span class="subxComment"># should never get past this point</span>
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<span id="L44" class="LineNr">44 </span><span class="Constant">$error:dead-end</span>:
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2019-10-18 05:03:35 +00:00
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<span id="L45" class="LineNr">45 </span> <span class="subxS1Comment"># . epilogue</span>
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2019-08-26 18:55:26 +00:00
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<span id="L46" class="LineNr">46 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span>
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<span id="L47" class="LineNr">47 </span> 5d/pop-to-ebp
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2019-02-19 06:43:01 +00:00
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<span id="L48" class="LineNr">48 </span> c3/return
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<span id="L49" class="LineNr">49 </span>
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<span id="L50" class="LineNr">50 </span><span class="subxS2Comment"># . . vim:nowrap:textwidth=0</span>
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2018-12-03 04:43:39 +00:00
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