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<a href='https://github.com/akkartik/mu/blob/master/subx/apps/handle.subx'>https://github.com/akkartik/mu/blob/master/subx/apps/handle.subx</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="subxComment"># A sketch of Mu-style handles or kinda-safe pointers, that add a modicum of</span>
<span id="L2" class="LineNr"> 2 </span><span class="subxComment"># checking to dynamically allocated memory.</span>
<span id="L3" class="LineNr"> 3 </span><span class="subxComment">#</span>
<span id="L4" class="LineNr"> 4 </span><span class="subxComment"># This approach avoids using 'allocate' directly in favor of two primitives:</span>
<span id="L5" class="LineNr"> 5 </span><span class="subxComment"># - 'new', which allocates some space (the 'payload'), stores the address</span>
<span id="L6" class="LineNr"> 6 </span><span class="subxComment"># along with an opaque 'alloc id' in a 'handle', and prepends the same</span>
<span id="L7" class="LineNr"> 7 </span><span class="subxComment"># alloc id to the payload.</span>
<span id="L8" class="LineNr"> 8 </span><span class="subxComment"># - 'lookup', which checks that the alloc id at the start of a handle matches</span>
<span id="L9" class="LineNr"> 9 </span><span class="subxComment"># the alloc id at the start of the payload before returning the address.</span>
<span id="L10" class="LineNr"> 10 </span><span class="subxComment">#</span>
<span id="L11" class="LineNr"> 11 </span><span class="subxComment"># Layout of a handle:</span>
<span id="L12" class="LineNr"> 12 </span><span class="subxComment"># offset 0: alloc id</span>
<span id="L13" class="LineNr"> 13 </span><span class="subxComment"># offset 4: address</span>
<span id="L14" class="LineNr"> 14 </span>
<span id="L15" class="LineNr"> 15 </span>== code
<span id="L16" class="LineNr"> 16 </span><span class="subxComment"># instruction effective address register displacement immediate</span>
<span id="L17" class="LineNr"> 17 </span><span class="subxS1Comment"># . op subop mod rm32 base index scale r32</span>
<span id="L18" class="LineNr"> 18 </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>
<span id="L19" class="LineNr"> 19 </span>
<span id="L20" class="LineNr"> 20 </span><span class="subxComment"># main:</span>
<span id="L21" class="LineNr"> 21 </span> e8/call run-tests/disp32 <span class="subxComment"># 'run-tests' is a function created automatically by SubX. It calls all functions that start with 'test-'.</span>
<span id="L22" class="LineNr"> 22 </span> <span class="subxComment"># syscall(exit, Num-test-failures)</span>
<span id="L23" class="LineNr"> 23 </span> 8b/copy 0/mod/indirect 5/rm32/.disp32 <span class="Normal"> . </span> <span class="Normal"> . </span> 3/r32/EBX <span class="SpecialChar"><a href='051test.subx.html#L87'>Num-test-failures</a></span>/disp32 <span class="subxComment"># copy *Num-test-failures to EBX</span>
<span id="L24" class="LineNr"> 24 </span> b8/copy-to-EAX 1/imm32/exit
<span id="L25" class="LineNr"> 25 </span> cd/syscall 0x80/imm8
<span id="L26" class="LineNr"> 26 </span>
<span id="L27" class="LineNr"> 27 </span><span class="subxFunction">new</span>: <span class="subxComment"># ad : (address allocation-descriptor), n : int, out : (address handle)</span>
<span id="L28" class="LineNr"> 28 </span> <span class="subxS1Comment"># . prolog</span>
<span id="L29" class="LineNr"> 29 </span> 55/push-EBP
<span id="L30" class="LineNr"> 30 </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>
<span id="L31" class="LineNr"> 31 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L32" class="LineNr"> 32 </span> 50/push-EAX
<span id="L33" class="LineNr"> 33 </span> 51/push-ECX
<span id="L34" class="LineNr"> 34 </span> 52/push-EDX
<span id="L35" class="LineNr"> 35 </span> <span class="subxComment"># ECX = n+4</span>
<span id="L36" class="LineNr"> 36 </span> 8b/copy 1/mod/*+disp8 5/rm32/EBP <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ECX 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(EBP+12) to ECX</span>
<span id="L37" class="LineNr"> 37 </span> 81 0/subop/add 3/mod/direct 1/rm32/ECX <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to ECX</span>
<span id="L38" class="LineNr"> 38 </span> <span class="subxComment"># EAX = allocate(ad, ECX)</span>
<span id="L39" class="LineNr"> 39 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L40" class="LineNr"> 40 </span> 51/push-ECX
<span id="L41" class="LineNr"> 41 </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>
<span id="L42" class="LineNr"> 42 </span> <span class="subxS2Comment"># . . call</span>
<span id="L43" class="LineNr"> 43 </span> e8/call <a href='066allocate.subx.html#L41'>allocate</a>/disp32
<span id="L44" class="LineNr"> 44 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L45" class="LineNr"> 45 </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>
<span id="L46" class="LineNr"> 46 </span> <span class="subxComment"># EDX = out</span>
<span id="L47" class="LineNr"> 47 </span> 8b/copy 1/mod/*+disp8 5/rm32/EBP <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 2/r32/EDX 0x10/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(EBP+16) to EDX</span>
<span id="L48" class="LineNr"> 48 </span> <span class="subxComment"># out->address = EAX</span>
<span id="L49" class="LineNr"> 49 </span> 89/copy 1/mod/*+disp8 2/rm32/EDX <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/EAX 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy EAX to *(EDX+4)</span>
<span id="L50" class="LineNr"> 50 </span> <span class="subxComment"># if (EAX == 0) out->alloc_id = 0, return</span>
<span id="L51" class="LineNr"> 51 </span> 81 7/subop/compare 3/mod/direct 0/rm32/EAX <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/imm32 <span class="subxComment"># compare EAX</span>
<span id="L52" class="LineNr"> 52 </span> 75/jump-if-not-equal $new:continue/disp8
<span id="L53" class="LineNr"> 53 </span> c7 0/subop/copy 0/mod/indirect 2/rm32/EDX <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/imm32 <span class="subxComment"># copy to *EDX</span>
<span id="L54" class="LineNr"> 54 </span> eb/jump $new:end/disp8
<span id="L55" class="LineNr"> 55 </span><span class="Constant">$new:continue</span>:
<span id="L56" class="LineNr"> 56 </span> <span class="subxComment"># otherwise:</span>
<span id="L57" class="LineNr"> 57 </span> <span class="subxComment"># ECX = *Next-alloc-id</span>
<span id="L58" class="LineNr"> 58 </span> 8b/copy 0/mod/indirect 5/rm32/.disp32 <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ECX <span class="SpecialChar">Next-alloc-id</span>/disp32 <span class="subxComment"># copy *Next-alloc-id to ECX</span>
<span id="L59" class="LineNr"> 59 </span> <span class="subxComment"># *EAX = *Next-alloc-id/ECX</span>
<span id="L60" class="LineNr"> 60 </span> 89/copy 0/mod/indirect 0/rm32/EAX <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ECX <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ECX to *EAX</span>
<span id="L61" class="LineNr"> 61 </span> <span class="subxComment"># out->alloc_id = *Next-alloc-id</span>
<span id="L62" class="LineNr"> 62 </span> 89/copy 0/mod/indirect 2/rm32/EDX <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ECX <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ECX to *EDX</span>
<span id="L63" class="LineNr"> 63 </span> <span class="subxComment"># increment *Next-alloc-id</span>
<span id="L64" class="LineNr"> 64 </span> ff 0/subop/increment 0/mod/indirect 5/rm32/.disp32 <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="SpecialChar">Next-alloc-id</span>/disp32 <span class="subxComment"># increment *Next-alloc-id</span>
<span id="L65" class="LineNr"> 65 </span><span class="Constant">$new:end</span>:
<span id="L66" class="LineNr"> 66 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L67" class="LineNr"> 67 </span> 5a/pop-to-EDX
<span id="L68" class="LineNr"> 68 </span> 59/pop-to-ECX
<span id="L69" class="LineNr"> 69 </span> 58/pop-to-EAX
<span id="L70" class="LineNr"> 70 </span> <span class="subxS1Comment"># . epilog</span>
<span id="L71" class="LineNr"> 71 </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>
<span id="L72" class="LineNr"> 72 </span> 5d/pop-to-EBP
<span id="L73" class="LineNr"> 73 </span> c3/return
<span id="L74" class="LineNr"> 74 </span>
<span id="L75" class="LineNr"> 75 </span><span class="subxTest">test-new</span>: <span class="subxH1Comment"># - this test uses the bottom of the stack segment as scratch space</span>
<span id="L76" class="LineNr"> 76 </span> <span class="subxS1Comment"># . prolog</span>
<span id="L77" class="LineNr"> 77 </span> 55/push-EBP
<span id="L78" class="LineNr"> 78 </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>
<span id="L79" class="LineNr"> 79 </span> <span class="subxComment"># *Next-alloc-id = 0x34</span>
<span id="L80" class="LineNr"> 80 </span> c7 0/subop/copy 0/mod/indirect 5/rm32/.disp32 <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="SpecialChar">Next-alloc-id</span>/disp32 0x34/imm32 <span class="subxComment"># copy to *Next-alloc-id</span>
<span id="L81" class="LineNr"> 81 </span> <span class="subxComment"># var ad/EAX : (address allocation-descriptor) = {0x0b000000, 0x0b00000a}</span>
<span id="L82" class="LineNr"> 82 </span> 68/push 0x0b00000a/imm32/limit
<span id="L83" class="LineNr"> 83 </span> 68/push 0x0b000000/imm32/curr
<span id="L84" class="LineNr"> 84 </span> 89/copy 3/mod/direct 0/rm32/EAX <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 EAX</span>
<span id="L85" class="LineNr"> 85 </span> <span class="subxComment"># var handle/ECX = {0, 0}</span>
<span id="L86" class="LineNr"> 86 </span> 68/push 0/imm32/address
<span id="L87" class="LineNr"> 87 </span> 68/push 0/imm32/alloc-id
<span id="L88" class="LineNr"> 88 </span> 89/copy 3/mod/direct 1/rm32/ECX <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 ECX</span>
<span id="L89" class="LineNr"> 89 </span> <span class="subxComment"># new(ad, 2, handle/ECX)</span>
<span id="L90" class="LineNr"> 90 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L91" class="LineNr"> 91 </span> 51/push-ECX
<span id="L92" class="LineNr"> 92 </span> 68/push 2/imm32/size
<span id="L93" class="LineNr"> 93 </span> 50/push-EAX
<span id="L94" class="LineNr"> 94 </span> <span class="subxS2Comment"># . . call</span>
<span id="L95" class="LineNr"> 95 </span> e8/call new/disp32
<span id="L96" class="LineNr"> 96 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L97" class="LineNr"> 97 </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> 0xc/imm32 <span class="subxComment"># add to ESP</span>
<span id="L98" class="LineNr"> 98 </span> <span class="subxComment"># check-ints-equal(handle->alloc_id, 0x34, msg)</span>
<span id="L99" class="LineNr"> 99 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L100" class="LineNr">100 </span> 68/push <span class="Constant">"F - test-new: alloc id of handle"</span>/imm32
<span id="L101" class="LineNr">101 </span> 68/push 0x34/imm32
<span id="L102" class="LineNr">102 </span> ff 6/subop/push 0/mod/indirect 1/rm32/ECX <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># push *ECX</span>
<span id="L103" class="LineNr">103 </span> <span class="subxS2Comment"># . . call</span>
<span id="L104" class="LineNr">104 </span> e8/call <a href='051test.subx.html#L24'>check-ints-equal</a>/disp32
<span id="L105" class="LineNr">105 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L106" class="LineNr">106 </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> 0xc/imm32 <span class="subxComment"># add to ESP</span>
<span id="L107" class="LineNr">107 </span> <span class="subxComment"># check-ints-equal(handle->address, 0x0b000000, msg)</span>
<span id="L108" class="LineNr">108 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L109" class="LineNr">109 </span> 68/push <span class="Constant">"F - test-new: address of handle"</span>/imm32
<span id="L110" class="LineNr">110 </span> 68/push 0x0b000000/imm32
<span id="L111" class="LineNr">111 </span> ff 6/subop/push 1/mod/*+disp8 1/rm32/ECX <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ECX+4)</span>
<span id="L112" class="LineNr">112 </span> <span class="subxS2Comment"># . . call</span>
<span id="L113" class="LineNr">113 </span> e8/call <a href='051test.subx.html#L24'>check-ints-equal</a>/disp32
<span id="L114" class="LineNr">114 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L115" class="LineNr">115 </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> 0xc/imm32 <span class="subxComment"># add to ESP</span>
<span id="L116" class="LineNr">116 </span> <span class="subxComment"># check-ints-equal(*handle->address, 0x34, msg)</span>
<span id="L117" class="LineNr">117 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L118" class="LineNr">118 </span> 68/push <span class="Constant">"F - test-new: alloc id of payload"</span>/imm32
<span id="L119" class="LineNr">119 </span> 68/push 0x34/imm32
<span id="L120" class="LineNr">120 </span> 8b/copy 1/mod/*+disp8 1/rm32/ECX <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 2/r32/EDX 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ECX+4) to EDX</span>
<span id="L121" class="LineNr">121 </span> ff 6/subop/push 0/mod/indirect 2/rm32/EDX <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># push *EDX</span>
<span id="L122" class="LineNr">122 </span> <span class="subxS2Comment"># . . call</span>
<span id="L123" class="LineNr">123 </span> e8/call <a href='051test.subx.html#L24'>check-ints-equal</a>/disp32
<span id="L124" class="LineNr">124 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L125" class="LineNr">125 </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> 0xc/imm32 <span class="subxComment"># add to ESP</span>
<span id="L126" class="LineNr">126 </span> <span class="subxComment"># check-ints-equal(*Next-alloc-id, 0x35)</span>
<span id="L127" class="LineNr">127 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L128" class="LineNr">128 </span> 68/push <span class="Constant">"F - test-new: next alloc id"</span>/imm32
<span id="L129" class="LineNr">129 </span> 68/push 0x35/imm32
<span id="L130" class="LineNr">130 </span> ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="SpecialChar">Next-alloc-id</span>/disp32 <span class="subxComment"># copy to *Next-alloc-id</span>
<span id="L131" class="LineNr">131 </span> <span class="subxS2Comment"># . . call</span>
<span id="L132" class="LineNr">132 </span> e8/call <a href='051test.subx.html#L24'>check-ints-equal</a>/disp32
<span id="L133" class="LineNr">133 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L134" class="LineNr">134 </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> 0xc/imm32 <span class="subxComment"># add to ESP</span>
<span id="L135" class="LineNr">135 </span> <span class="subxComment"># clean up</span>
<span id="L136" class="LineNr">136 </span> <span class="subxS1Comment"># . *Next-alloc-id = 1</span>
<span id="L137" class="LineNr">137 </span> c7 0/subop/copy 0/mod/direct 0/rm32/EAX <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/imm32 <span class="subxComment"># copy to *EAX</span>
<span id="L138" class="LineNr">138 </span> <span class="subxS1Comment"># . epilog</span>
<span id="L139" class="LineNr">139 </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>
<span id="L140" class="LineNr">140 </span> 5d/pop-to-EBP
<span id="L141" class="LineNr">141 </span> c3/return
<span id="L142" class="LineNr">142 </span>
<span id="L143" class="LineNr">143 </span><span class="subxTest">test-new-failure</span>:
<span id="L144" class="LineNr">144 </span> <span class="subxS1Comment"># . prolog</span>
<span id="L145" class="LineNr">145 </span> 55/push-EBP
<span id="L146" class="LineNr">146 </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>
<span id="L147" class="LineNr">147 </span> <span class="subxS1Comment"># . *Next-alloc-id = 0x34</span>
<span id="L148" class="LineNr">148 </span> c7 0/subop/copy 0/mod/indirect 5/rm32/.disp32 <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="SpecialChar">Next-alloc-id</span>/disp32 0x34/imm32 <span class="subxComment"># copy to *Next-alloc-id</span>
<span id="L149" class="LineNr">149 </span> <span class="subxComment"># define an allocation-descriptor with no space left</span>
<span id="L150" class="LineNr">150 </span> <span class="subxS1Comment"># . var ad/EAX : (address allocation-descriptor) = {0x10, 0x10}</span>
<span id="L151" class="LineNr">151 </span> 68/push 0x10/imm32/limit
<span id="L152" class="LineNr">152 </span> 68/push 0x10/imm32/curr
<span id="L153" class="LineNr">153 </span> 89/copy 3/mod/direct 0/rm32/EAX <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 EAX</span>
<span id="L154" class="LineNr">154 </span> <span class="subxS1Comment"># . var handle/ECX = {random, random}</span>
<span id="L155" class="LineNr">155 </span> 68/push 1234/imm32/address
<span id="L156" class="LineNr">156 </span> 68/push 5678/imm32/alloc-id
<span id="L157" class="LineNr">157 </span> 89/copy 3/mod/direct 1/rm32/ECX <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 ECX</span>
<span id="L158" class="LineNr">158 </span> <span class="subxComment"># try to allocate</span>
<span id="L159" class="LineNr">159 </span> <span class="subxS1Comment"># . new(ad, 2, handle/ECX)</span>
<span id="L160" class="LineNr">160 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L161" class="LineNr">161 </span> 51/push-ECX
<span id="L162" class="LineNr">162 </span> 68/push 2/imm32/size
<span id="L163" class="LineNr">163 </span> 50/push-EAX
<span id="L164" class="LineNr">164 </span> <span class="subxS2Comment"># . . call</span>
<span id="L165" class="LineNr">165 </span> e8/call new/disp32
<span id="L166" class="LineNr">166 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L167" class="LineNr">167 </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> 0xc/imm32 <span class="subxComment"># add to ESP</span>
<span id="L168" class="LineNr">168 </span> <span class="subxComment"># handle should be cleared</span>
<span id="L169" class="LineNr">169 </span> <span class="subxS1Comment"># . check-ints-equal(handle->alloc_id, 0, msg)</span>
<span id="L170" class="LineNr">170 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L171" class="LineNr">171 </span> 68/push <span class="Constant">"F - test-new-failure: alloc id of handle"</span>/imm32
<span id="L172" class="LineNr">172 </span> 68/push 0/imm32
<span id="L173" class="LineNr">173 </span> ff 6/subop/push 0/mod/indirect 1/rm32/ECX <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># push *ECX</span>
<span id="L174" class="LineNr">174 </span> <span class="subxS2Comment"># . . call</span>
<span id="L175" class="LineNr">175 </span> e8/call <a href='051test.subx.html#L24'>check-ints-equal</a>/disp32
<span id="L176" class="LineNr">176 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L177" class="LineNr">177 </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> 0xc/imm32 <span class="subxComment"># add to ESP</span>
<span id="L178" class="LineNr">178 </span> <span class="subxS1Comment"># . check-ints-equal(handle->address, 0, msg)</span>
<span id="L179" class="LineNr">179 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L180" class="LineNr">180 </span> 68/push <span class="Constant">"F - test-new-failure: address of handle"</span>/imm32
<span id="L181" class="LineNr">181 </span> 68/push 0/imm32
<span id="L182" class="LineNr">182 </span> ff 6/subop/push 1/mod/*+disp8 1/rm32/ECX <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ECX+4)</span>
<span id="L183" class="LineNr">183 </span> <span class="subxS2Comment"># . . call</span>
<span id="L184" class="LineNr">184 </span> e8/call <a href='051test.subx.html#L24'>check-ints-equal</a>/disp32
<span id="L185" class="LineNr">185 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L186" class="LineNr">186 </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> 0xc/imm32 <span class="subxComment"># add to ESP</span>
<span id="L187" class="LineNr">187 </span> <span class="subxComment"># Next-alloc-id should be unmodified</span>
<span id="L188" class="LineNr">188 </span> <span class="subxS1Comment"># . check-ints-equal(*Next-alloc-id, 0x34)</span>
<span id="L189" class="LineNr">189 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L190" class="LineNr">190 </span> 68/push <span class="Constant">"F - test-new-failure: next alloc id"</span>/imm32
<span id="L191" class="LineNr">191 </span> 68/push 0x34/imm32
<span id="L192" class="LineNr">192 </span> ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="SpecialChar">Next-alloc-id</span>/disp32 <span class="subxComment"># copy to *Next-alloc-id</span>
<span id="L193" class="LineNr">193 </span> <span class="subxS2Comment"># . . call</span>
<span id="L194" class="LineNr">194 </span> e8/call <a href='051test.subx.html#L24'>check-ints-equal</a>/disp32
<span id="L195" class="LineNr">195 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L196" class="LineNr">196 </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> 0xc/imm32 <span class="subxComment"># add to ESP</span>
<span id="L197" class="LineNr">197 </span> <span class="subxComment"># clean up</span>
<span id="L198" class="LineNr">198 </span> <span class="subxS1Comment"># . *Next-alloc-id = 1</span>
<span id="L199" class="LineNr">199 </span> c7 0/subop/copy 0/mod/direct 0/rm32/EAX <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/imm32 <span class="subxComment"># copy to *EAX</span>
<span id="L200" class="LineNr">200 </span> <span class="subxS1Comment"># . epilog</span>
<span id="L201" class="LineNr">201 </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>
<span id="L202" class="LineNr">202 </span> 5d/pop-to-EBP
<span id="L203" class="LineNr">203 </span> c3/return
<span id="L204" class="LineNr">204 </span>
<span id="L205" class="LineNr">205 </span>== data
<span id="L206" class="LineNr">206 </span>
<span id="L207" class="LineNr">207 </span><span class="subxComment"># Monotonically increasing counter for calls to 'new'</span>
<span id="L208" class="LineNr">208 </span><span class="SpecialChar">Next-alloc-id</span>:
<span id="L209" class="LineNr">209 </span> 01 00 00 00 <span class="subxComment"># 1</span>
<span id="L210" class="LineNr">210 </span>
<span id="L211" class="LineNr">211 </span><span class="subxS2Comment"># . . vim:nowrap:textwidth=0</span>
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