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fix other mandelbrot variants
[mu.git] / html / linux / 120allocate.subx.html
blob5c4c9039237c722de115f7504b84be732e407f62
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61 <a href='https://github.com/akkartik/mu/blob/main/linux/120allocate.subx'>https://github.com/akkartik/mu/blob/main/linux/120allocate.subx</a>
62 <pre id='vimCodeElement'>
63 <span id="L1" class="LineNr"> 1 </span><span class="subxComment"># Helper to dynamically allocate memory on the heap.</span>
64 <span id="L2" class="LineNr"> 2 </span><span class="subxComment">#</span>
65 <span id="L3" class="LineNr"> 3 </span><span class="subxComment"># We'd like to be able to write tests for functions that allocate memory,</span>
66 <span id="L4" class="LineNr"> 4 </span><span class="subxComment"># making assertions on the precise addresses used. To achieve this we'll pass</span>
67 <span id="L5" class="LineNr"> 5 </span><span class="subxComment"># in an *allocation descriptor* to allocate from.</span>
68 <span id="L6" class="LineNr"> 6 </span><span class="subxComment">#</span>
69 <span id="L7" class="LineNr"> 7 </span><span class="subxComment"># Allocation descriptors are also useful outside of tests. Assembly and machine</span>
70 <span id="L8" class="LineNr"> 8 </span><span class="subxComment"># code are of necessity unsafe languages, and one of the most insidious kinds</span>
71 <span id="L9" class="LineNr"> 9 </span><span class="subxComment"># of bugs unsafe languages expose us to are dangling pointers to memory that</span>
72 <span id="L10" class="LineNr"> 10 </span><span class="subxComment"># has been freed and potentially even reused for something totally different.</span>
73 <span id="L11" class="LineNr"> 11 </span><span class="subxComment"># To reduce the odds of such &quot;use after free&quot; errors, SubX programs tend to not</span>
74 <span id="L12" class="LineNr"> 12 </span><span class="subxComment"># reclaim and reuse dynamically allocated memory. (Running out of memory is far</span>
75 <span id="L13" class="LineNr"> 13 </span><span class="subxComment"># easier to debug.) Long-running programs that want to reuse memory are mostly</span>
76 <span id="L14" class="LineNr"> 14 </span><span class="subxComment"># on their own to be careful. However, they do get one bit of help: they can</span>
77 <span id="L15" class="LineNr"> 15 </span><span class="subxComment"># carve out chunks of memory and then allocate from them manually using this</span>
78 <span id="L16" class="LineNr"> 16 </span><span class="subxComment"># very same 'allocate' helper. They just need a new allocation descriptor for</span>
79 <span id="L17" class="LineNr"> 17 </span><span class="subxComment"># their book-keeping.</span>
80 <span id="L18" class="LineNr"> 18 </span>
81 <span id="L19" class="LineNr"> 19 </span>== data
82 <span id="L20" class="LineNr"> 20 </span>
83 <span id="L21" class="LineNr"> 21 </span><span class="subxComment"># Allocations are returned in a handle, which consists of an alloc-id and a payload.</span>
84 <span id="L22" class="LineNr"> 22 </span><span class="subxComment"># The alloc-id helps detect use-after-free errors.</span>
85 <span id="L23" class="LineNr"> 23 </span><span class="SpecialChar">Handle-size</span>: <span class="subxComment"># (addr int)</span>
86 <span id="L24" class="LineNr"> 24 </span> 8/imm32
87 <span id="L25" class="LineNr"> 25 </span>
88 <span id="L26" class="LineNr"> 26 </span><span class="subxComment"># A default allocation descriptor for programs to use.</span>
89 <span id="L27" class="LineNr"> 27 </span><span class="SpecialChar">Heap</span>: <span class="subxComment"># allocation-descriptor</span>
90 <span id="L28" class="LineNr"> 28 </span> <span class="subxComment"># curr</span>
91 <span id="L29" class="LineNr"> 29 </span> 0/imm32
92 <span id="L30" class="LineNr"> 30 </span> <span class="subxComment"># limit</span>
93 <span id="L31" class="LineNr"> 31 </span> 0/imm32
94 <span id="L32" class="LineNr"> 32 </span>
95 <span id="L33" class="LineNr"> 33 </span><span class="subxComment"># a reasonable default</span>
96 <span id="L34" class="LineNr"> 34 </span><span class="SpecialChar">Heap-size</span>: <span class="subxComment"># int</span>
97 <span id="L35" class="LineNr"> 35 </span> 0x800000/imm32/8MB
98 <span id="L36" class="LineNr"> 36 </span>
99 <span id="L37" class="LineNr"> 37 </span><span class="SpecialChar">Next-alloc-id</span>: <span class="subxComment"># int</span>
100 <span id="L38" class="LineNr"> 38 </span> 0x100/imm32 <span class="subxComment"># save a few alloc ids for fake handles</span>
101 <span id="L39" class="LineNr"> 39 </span>
102 <span id="L40" class="LineNr"> 40 </span>== code
103 <span id="L41" class="LineNr"> 41 </span><span class="subxComment"># instruction effective address register displacement immediate</span>
104 <span id="L42" class="LineNr"> 42 </span><span class="subxS1Comment"># . op subop mod rm32 base index scale r32</span>
105 <span id="L43" class="LineNr"> 43 </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>
106 <span id="L44" class="LineNr"> 44 </span>
107 <span id="L45" class="LineNr"> 45 </span><span class="CommentedCode">#? # Let's start initializing the default allocation descriptor.</span>
108 <span id="L46" class="LineNr"> 46 </span><span class="CommentedCode">#? </span>
109 <span id="L47" class="LineNr"> 47 </span><span class="CommentedCode">#? Entry:</span>
110 <span id="L48" class="LineNr"> 48 </span><span class="CommentedCode">#? # initialize heap</span>
111 <span id="L49" class="LineNr"> 49 </span><span class="CommentedCode">#? # . Heap = new-segment(Heap-size)</span>
112 <span id="L50" class="LineNr"> 50 </span><span class="CommentedCode">#? # . . push args</span>
113 <span id="L51" class="LineNr"> 51 </span><span class="CommentedCode">#? 68/push Heap/imm32</span>
114 <span id="L52" class="LineNr"> 52 </span><span class="CommentedCode">#? ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Heap-size/disp32 # push *Heap-size</span>
115 <span id="L53" class="LineNr"> 53 </span><span class="CommentedCode">#? # . . call</span>
116 <span id="L54" class="LineNr"> 54 </span><span class="CommentedCode">#? e8/call new-segment/disp32</span>
117 <span id="L55" class="LineNr"> 55 </span><span class="CommentedCode">#? # . . discard args</span>
118 <span id="L56" class="LineNr"> 56 </span><span class="CommentedCode">#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp</span>
119 <span id="L57" class="LineNr"> 57 </span>
120 <span id="L58" class="LineNr"> 58 </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>
121 <span id="L59" class="LineNr"> 59 </span><span class="Constant">$array-equal-main:end</span>:
122 <span id="L60" class="LineNr"> 60 </span> <span class="subxComment"># syscall_exit(Num-test-failures)</span>
123 <span id="L61" class="LineNr"> 61 </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='102test.subx.html#L89'>Num-test-failures</a></span>/disp32 <span class="subxComment"># copy *Num-test-failures to ebx</span>
124 <span id="L62" class="LineNr"> 62 </span> e8/call <a href='000init.subx.html#L18'>syscall_exit</a>/disp32
125 <span id="L63" class="LineNr"> 63 </span>
126 <span id="L64" class="LineNr"> 64 </span><span class="subxComment"># Allocate and clear 'n' bytes of memory from an allocation-descriptor 'ad'.</span>
127 <span id="L65" class="LineNr"> 65 </span><span class="subxComment"># Abort if there isn't enough memory in 'ad'.</span>
128 <span id="L66" class="LineNr"> 66 </span><span class="subxFunction">allocate</span>: <span class="subxComment"># ad: (addr allocation-descriptor), n: int, out: (addr handle _)</span>
129 <span id="L67" class="LineNr"> 67 </span> <span class="subxS1Comment"># . prologue</span>
130 <span id="L68" class="LineNr"> 68 </span> 55/push-ebp
131 <span id="L69" class="LineNr"> 69 </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>
132 <span id="L70" class="LineNr"> 70 </span> <span class="subxS1Comment"># . save registers</span>
133 <span id="L71" class="LineNr"> 71 </span> 50/push-eax
134 <span id="L72" class="LineNr"> 72 </span> <span class="subxComment"># allocate-raw(ad, n, out)</span>
135 <span id="L73" class="LineNr"> 73 </span> <span class="subxS2Comment"># . . push args</span>
136 <span id="L74" class="LineNr"> 74 </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>
137 <span id="L75" class="LineNr"> 75 </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>
138 <span id="L76" class="LineNr"> 76 </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>
139 <span id="L77" class="LineNr"> 77 </span> <span class="subxS2Comment"># . . call</span>
140 <span id="L78" class="LineNr"> 78 </span> e8/call <a href='120allocate.subx.html#L103'>allocate-raw</a>/disp32
141 <span id="L79" class="LineNr"> 79 </span> <span class="subxS2Comment"># . . discard args</span>
142 <span id="L80" class="LineNr"> 80 </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>
143 <span id="L81" class="LineNr"> 81 </span> <span class="subxComment"># eax = out-&gt;payload + 4</span>
144 <span id="L82" class="LineNr"> 82 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax 0x10/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+16) to eax</span>
145 <span id="L83" class="LineNr"> 83 </span> 8b/copy 1/mod/*+disp8 0/rm32/eax <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+4) to eax</span>
146 <span id="L84" class="LineNr"> 84 </span> 05/add-to-eax 4/imm32
147 <span id="L85" class="LineNr"> 85 </span> <span class="subxComment"># zero-out(eax, n)</span>
148 <span id="L86" class="LineNr"> 86 </span> <span class="subxS2Comment"># . . push args</span>
149 <span id="L87" class="LineNr"> 87 </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>
150 <span id="L88" class="LineNr"> 88 </span> 50/push-eax
151 <span id="L89" class="LineNr"> 89 </span> <span class="subxS2Comment"># . . call</span>
152 <span id="L90" class="LineNr"> 90 </span> e8/call <a href='120allocate.subx.html#L889'>zero-out</a>/disp32
153 <span id="L91" class="LineNr"> 91 </span> <span class="subxS2Comment"># . . discard args</span>
154 <span id="L92" class="LineNr"> 92 </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>
155 <span id="L93" class="LineNr"> 93 </span><span class="Constant">$allocate:end</span>:
156 <span id="L94" class="LineNr"> 94 </span> <span class="subxS1Comment"># . restore registers</span>
157 <span id="L95" class="LineNr"> 95 </span> 58/pop-to-eax
158 <span id="L96" class="LineNr"> 96 </span> <span class="subxS1Comment"># . epilogue</span>
159 <span id="L97" class="LineNr"> 97 </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>
160 <span id="L98" class="LineNr"> 98 </span> 5d/pop-to-ebp
161 <span id="L99" class="LineNr"> 99 </span> c3/return
162 <span id="L100" class="LineNr">100 </span>
163 <span id="L101" class="LineNr">101 </span><span class="subxComment"># Claim the next 'n' bytes of memory starting at ad-&gt;curr and update ad-&gt;curr.</span>
164 <span id="L102" class="LineNr">102 </span><span class="subxComment"># Abort if there isn't enough memory in 'ad'.</span>
165 <span id="L103" class="LineNr">103 </span><span class="subxFunction">allocate-raw</span>: <span class="subxComment"># ad: (addr allocation-descriptor), n: int, out: (addr handle _)</span>
166 <span id="L104" class="LineNr">104 </span> <span class="subxS1Comment"># . prologue</span>
167 <span id="L105" class="LineNr">105 </span> 55/push-ebp
168 <span id="L106" class="LineNr">106 </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>
169 <span id="L107" class="LineNr">107 </span> <span class="subxS1Comment"># . save registers</span>
170 <span id="L108" class="LineNr">108 </span> 50/push-eax
171 <span id="L109" class="LineNr">109 </span> 51/push-ecx
172 <span id="L110" class="LineNr">110 </span> 52/push-edx
173 <span id="L111" class="LineNr">111 </span> 53/push-ebx
174 <span id="L112" class="LineNr">112 </span> 56/push-esi
175 <span id="L113" class="LineNr">113 </span> 57/push-edi
176 <span id="L114" class="LineNr">114 </span> <span class="subxComment"># ecx = ad</span>
177 <span id="L115" class="LineNr">115 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+8) to ecx</span>
178 <span id="L116" class="LineNr">116 </span> <span class="subxComment"># edx = out</span>
179 <span id="L117" class="LineNr">117 </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>
180 <span id="L118" class="LineNr">118 </span> <span class="subxComment"># ebx = n</span>
181 <span id="L119" class="LineNr">119 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 3/r32/ebx 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+12) to ebx</span>
182 <span id="L120" class="LineNr">120 </span> <span class="subxComment"># out-&gt;alloc-id = Next-alloc-id</span>
183 <span id="L121" class="LineNr">121 </span> 8b/copy 0/mod/indirect 5/rm32/.disp32 <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax <span class="SpecialChar"><a href='120allocate.subx.html#L37'>Next-alloc-id</a></span>/disp32 <span class="subxComment"># copy *Next-alloc-id to eax</span>
184 <span id="L122" class="LineNr">122 </span> 89/copy 0/mod/indirect 2/rm32/edx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy eax to *edx</span>
185 <span id="L123" class="LineNr">123 </span> <span class="subxComment"># out-&gt;payload = ad-&gt;curr</span>
186 <span id="L124" class="LineNr">124 </span> 8b/copy 0/mod/indirect 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy *ecx to eax</span>
187 <span id="L125" class="LineNr">125 </span><span class="Constant">$allocate-raw:save-payload-in-eax</span>:
188 <span id="L126" class="LineNr">126 </span> 89/copy 1/mod/*+disp8 2/rm32/edx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy eax to *(edx+4)</span>
189 <span id="L127" class="LineNr">127 </span> <span class="subxComment"># *out-&gt;payload = Next-alloc-id</span>
190 <span id="L128" class="LineNr">128 </span> 8b/copy 1/mod/*+disp8 2/rm32/edx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 7/r32/edi 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(edx+4) to edi</span>
191 <span id="L129" class="LineNr">129 </span> 8b/copy 0/mod/indirect 5/rm32/.disp32 <span class="Normal"> . </span> <span class="Normal"> . </span> 6/r32/esi <span class="SpecialChar"><a href='120allocate.subx.html#L37'>Next-alloc-id</a></span>/disp32 <span class="subxComment"># copy *Next-alloc-id to esi</span>
192 <span id="L130" class="LineNr">130 </span> 89/copy 0/mod/indirect 7/rm32/edi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 6/r32/esi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esi to *edi</span>
193 <span id="L131" class="LineNr">131 </span><span class="Constant">$allocate-raw:increment-next-alloc-id</span>:
194 <span id="L132" class="LineNr">132 </span> <span class="subxComment"># increment *Next-alloc-id</span>
195 <span id="L133" class="LineNr">133 </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"><a href='120allocate.subx.html#L37'>Next-alloc-id</a></span>/disp32 <span class="subxComment"># increment *Next-alloc-id</span>
196 <span id="L134" class="LineNr">134 </span> <span class="subxComment"># check if there's enough space</span>
197 <span id="L135" class="LineNr">135 </span> <span class="subxComment"># TODO: move this check up before any state updates when we support error recovery</span>
198 <span id="L136" class="LineNr">136 </span> 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 3/index/ebx <span class="Normal"> . </span> 0/r32/eax 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy eax+ebx+4 to eax</span>
199 <span id="L137" class="LineNr">137 </span> 3b/compare 1/mod/*+disp8 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># compare eax with *(ecx+4)</span>
200 <span id="L138" class="LineNr">138 </span> 73/jump-if-&gt;=-signed $allocate-raw:abort/disp8
201 <span id="L139" class="LineNr">139 </span><span class="Constant">$allocate-raw:commit</span>:
202 <span id="L140" class="LineNr">140 </span> <span class="subxComment"># ad-&gt;curr += n+4</span>
203 <span id="L141" class="LineNr">141 </span> 89/copy 0/mod/indirect 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy eax to *ecx</span>
204 <span id="L142" class="LineNr">142 </span><span class="Constant">$allocate-raw:end</span>:
205 <span id="L143" class="LineNr">143 </span> <span class="subxS1Comment"># . restore registers</span>
206 <span id="L144" class="LineNr">144 </span> 5f/pop-to-edi
207 <span id="L145" class="LineNr">145 </span> 5e/pop-to-esi
208 <span id="L146" class="LineNr">146 </span> 5b/pop-to-ebx
209 <span id="L147" class="LineNr">147 </span> 5a/pop-to-edx
210 <span id="L148" class="LineNr">148 </span> 59/pop-to-ecx
211 <span id="L149" class="LineNr">149 </span> 58/pop-to-eax
212 <span id="L150" class="LineNr">150 </span> <span class="subxS1Comment"># . epilogue</span>
213 <span id="L151" class="LineNr">151 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span>
214 <span id="L152" class="LineNr">152 </span> 5d/pop-to-ebp
215 <span id="L153" class="LineNr">153 </span> c3/return
216 <span id="L154" class="LineNr">154 </span>
217 <span id="L155" class="LineNr">155 </span><span class="Constant">$allocate-raw:abort</span>:
218 <span id="L156" class="LineNr">156 </span> <span class="subxS1Comment"># . _write(2/stderr, error)</span>
219 <span id="L157" class="LineNr">157 </span> <span class="subxS2Comment"># . . push args</span>
220 <span id="L158" class="LineNr">158 </span> 68/push <span class="Constant">&quot;allocate: failed\n&quot;</span>/imm32
221 <span id="L159" class="LineNr">159 </span> 68/push 2/imm32/stderr
222 <span id="L160" class="LineNr">160 </span> <span class="subxS2Comment"># . . call</span>
223 <span id="L161" class="LineNr">161 </span> e8/call <a href='101_write.subx.html#L12'>_write</a>/disp32
224 <span id="L162" class="LineNr">162 </span> <span class="subxS2Comment"># . . discard args</span>
225 <span id="L163" class="LineNr">163 </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>
226 <span id="L164" class="LineNr">164 </span> <span class="subxS1Comment"># . syscall_exit(1)</span>
227 <span id="L165" class="LineNr">165 </span> bb/copy-to-ebx 1/imm32
228 <span id="L166" class="LineNr">166 </span> e8/call <a href='000init.subx.html#L18'>syscall_exit</a>/disp32
229 <span id="L167" class="LineNr">167 </span> <span class="subxComment"># never gets here</span>
230 <span id="L168" class="LineNr">168 </span>
231 <span id="L169" class="LineNr">169 </span><span class="subxTest">test-allocate-raw-success</span>:
232 <span id="L170" class="LineNr">170 </span> <span class="subxS1Comment"># . prologue</span>
233 <span id="L171" class="LineNr">171 </span> 55/push-ebp
234 <span id="L172" class="LineNr">172 </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>
235 <span id="L173" class="LineNr">173 </span> <span class="subxComment"># var ad/ecx: allocation-descriptor</span>
236 <span id="L174" class="LineNr">174 </span> 68/push 0/imm32/limit
237 <span id="L175" class="LineNr">175 </span> 68/push 0/imm32/curr
238 <span id="L176" class="LineNr">176 </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>
239 <span id="L177" class="LineNr">177 </span> <span class="subxComment"># ad = new-segment(512)</span>
240 <span id="L178" class="LineNr">178 </span> <span class="subxS2Comment"># . . push args</span>
241 <span id="L179" class="LineNr">179 </span> 51/push-ecx
242 <span id="L180" class="LineNr">180 </span> 68/push 0x200/imm32
243 <span id="L181" class="LineNr">181 </span> <span class="subxS2Comment"># . . call</span>
244 <span id="L182" class="LineNr">182 </span> e8/call <a href='104new-segment.subx.html#L40'>new-segment</a>/disp32
245 <span id="L183" class="LineNr">183 </span> <span class="subxS2Comment"># . . discard args</span>
246 <span id="L184" class="LineNr">184 </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>
247 <span id="L185" class="LineNr">185 </span> <span class="subxComment"># var expected-payload/ebx = ad-&gt;curr</span>
248 <span id="L186" class="LineNr">186 </span> 8b/copy 0/mod/indirect 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 3/r32/ebx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy *ecx to ebx</span>
249 <span id="L187" class="LineNr">187 </span> <span class="subxComment"># var h/edx: handle = {0, 0}</span>
250 <span id="L188" class="LineNr">188 </span> 68/push 0/imm32
251 <span id="L189" class="LineNr">189 </span> 68/push 0/imm32
252 <span id="L190" class="LineNr">190 </span> 89/copy 3/mod/direct 2/rm32/edx <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 edx</span>
253 <span id="L191" class="LineNr">191 </span> <span class="subxComment"># *Next-alloc-id = 0x34</span>
254 <span id="L192" class="LineNr">192 </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"><a href='120allocate.subx.html#L37'>Next-alloc-id</a></span>/disp32 0x34/imm32 <span class="subxComment"># copy to *Next-alloc-id</span>
255 <span id="L193" class="LineNr">193 </span> <span class="subxComment"># allocate-raw(ad, 3, h)</span>
256 <span id="L194" class="LineNr">194 </span> <span class="subxS2Comment"># . . push args</span>
257 <span id="L195" class="LineNr">195 </span> 52/push-edx
258 <span id="L196" class="LineNr">196 </span> 68/push 3/imm32
259 <span id="L197" class="LineNr">197 </span> 51/push-ecx
260 <span id="L198" class="LineNr">198 </span> <span class="subxS2Comment"># . . call</span>
261 <span id="L199" class="LineNr">199 </span> e8/call <a href='120allocate.subx.html#L103'>allocate-raw</a>/disp32
262 <span id="L200" class="LineNr">200 </span> <span class="subxS2Comment"># . . discard args</span>
263 <span id="L201" class="LineNr">201 </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>
264 <span id="L202" class="LineNr">202 </span> <span class="subxComment"># check-ints-equal(h-&gt;alloc-id, 0x34, msg)</span>
265 <span id="L203" class="LineNr">203 </span> <span class="subxS2Comment"># . . push args</span>
266 <span id="L204" class="LineNr">204 </span> 68/push <span class="Constant">&quot;F - <a href='120allocate.subx.html#L169'>test-allocate-raw-success</a>: sets alloc-id in handle&quot;</span>/imm32
267 <span id="L205" class="LineNr">205 </span> 68/push 0x34/imm32
268 <span id="L206" class="LineNr">206 </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>
269 <span id="L207" class="LineNr">207 </span> <span class="subxS2Comment"># . . call</span>
270 <span id="L208" class="LineNr">208 </span> e8/call <a href='102test.subx.html#L23'>check-ints-equal</a>/disp32
271 <span id="L209" class="LineNr">209 </span> <span class="subxS2Comment"># . . discard args</span>
272 <span id="L210" class="LineNr">210 </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>
273 <span id="L211" class="LineNr">211 </span> <span class="subxComment"># check-ints-equal(h-&gt;payload, expected-payload, msg)</span>
274 <span id="L212" class="LineNr">212 </span> <span class="subxS2Comment"># . . push args</span>
275 <span id="L213" class="LineNr">213 </span> 68/push <span class="Constant">&quot;F - <a href='120allocate.subx.html#L169'>test-allocate-raw-success</a>: sets payload in handle&quot;</span>/imm32
276 <span id="L214" class="LineNr">214 </span> 53/push-ebx
277 <span id="L215" class="LineNr">215 </span> ff 6/subop/push 1/mod/*+disp8 2/rm32/edx <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 *(edx+4)</span>
278 <span id="L216" class="LineNr">216 </span> <span class="subxS2Comment"># . . call</span>
279 <span id="L217" class="LineNr">217 </span> e8/call <a href='102test.subx.html#L23'>check-ints-equal</a>/disp32
280 <span id="L218" class="LineNr">218 </span> <span class="subxS2Comment"># . . discard args</span>
281 <span id="L219" class="LineNr">219 </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>
282 <span id="L220" class="LineNr">220 </span> <span class="subxComment"># check-ints-equal(h-&gt;payload-&gt;alloc-id, 0x34, msg)</span>
283 <span id="L221" class="LineNr">221 </span> <span class="subxS2Comment"># . . push args</span>
284 <span id="L222" class="LineNr">222 </span> 68/push <span class="Constant">&quot;F - <a href='120allocate.subx.html#L169'>test-allocate-raw-success</a>: sets alloc-id in payload&quot;</span>/imm32
285 <span id="L223" class="LineNr">223 </span> 68/push 0x34/imm32
286 <span id="L224" class="LineNr">224 </span> ff 6/subop/push 0/mod/indirect 3/rm32/ebx <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 *ebx</span>
287 <span id="L225" class="LineNr">225 </span> <span class="subxS2Comment"># . . call</span>
288 <span id="L226" class="LineNr">226 </span> e8/call <a href='102test.subx.html#L23'>check-ints-equal</a>/disp32
289 <span id="L227" class="LineNr">227 </span> <span class="subxS2Comment"># . . discard args</span>
290 <span id="L228" class="LineNr">228 </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>
291 <span id="L229" class="LineNr">229 </span> <span class="subxComment"># check-ints-equal(*Next-alloc-id, 0x35, msg)</span>
292 <span id="L230" class="LineNr">230 </span> <span class="subxS2Comment"># . . push args</span>
293 <span id="L231" class="LineNr">231 </span> 68/push <span class="Constant">&quot;F - <a href='120allocate.subx.html#L169'>test-allocate-raw-success</a>: increments Next-alloc-id&quot;</span>/imm32
294 <span id="L232" class="LineNr">232 </span> 68/push 0x35/imm32
295 <span id="L233" class="LineNr">233 </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"><a href='120allocate.subx.html#L37'>Next-alloc-id</a></span>/disp32 <span class="subxComment"># push *Next-alloc-id</span>
296 <span id="L234" class="LineNr">234 </span> <span class="subxS2Comment"># . . call</span>
297 <span id="L235" class="LineNr">235 </span> e8/call <a href='102test.subx.html#L23'>check-ints-equal</a>/disp32
298 <span id="L236" class="LineNr">236 </span> <span class="subxS2Comment"># . . discard args</span>
299 <span id="L237" class="LineNr">237 </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>
300 <span id="L238" class="LineNr">238 </span> <span class="subxComment"># check-ints-equal(ad-&gt;curr - expected-payload, 3 + 4 for alloc-id, msg)</span>
301 <span id="L239" class="LineNr">239 </span> <span class="subxS2Comment"># . . push args</span>
302 <span id="L240" class="LineNr">240 </span> 68/push <span class="Constant">&quot;F - <a href='120allocate.subx.html#L169'>test-allocate-raw-success</a>: updates allocation descriptor&quot;</span>/imm32
303 <span id="L241" class="LineNr">241 </span> 68/push 7/imm32
304 <span id="L242" class="LineNr">242 </span> 8b/copy 0/mod/indirect 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy *ecx to eax</span>
305 <span id="L243" class="LineNr">243 </span> 29/subtract 3/mod/direct 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 3/r32/ebx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># subtract ebx from eax</span>
306 <span id="L244" class="LineNr">244 </span> 50/push-eax
307 <span id="L245" class="LineNr">245 </span> <span class="subxS2Comment"># . . call</span>
308 <span id="L246" class="LineNr">246 </span> e8/call <a href='102test.subx.html#L23'>check-ints-equal</a>/disp32
309 <span id="L247" class="LineNr">247 </span> <span class="subxS2Comment"># . . discard args</span>
310 <span id="L248" class="LineNr">248 </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>
311 <span id="L249" class="LineNr">249 </span> <span class="subxComment"># clean up</span>
312 <span id="L250" class="LineNr">250 </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"><a href='120allocate.subx.html#L37'>Next-alloc-id</a></span>/disp32 0x100/imm32 <span class="subxComment"># copy to *Next-alloc-id</span>
313 <span id="L251" class="LineNr">251 </span> <span class="subxS1Comment"># . reclaim locals</span>
314 <span id="L252" class="LineNr">252 </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> 0x10/imm32 <span class="subxComment"># add to esp</span>
315 <span id="L253" class="LineNr">253 </span> <span class="subxS1Comment"># . epilogue</span>
316 <span id="L254" class="LineNr">254 </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>
317 <span id="L255" class="LineNr">255 </span> 5d/pop-to-ebp
318 <span id="L256" class="LineNr">256 </span> c3/return
319 <span id="L257" class="LineNr">257 </span>
320 <span id="L258" class="LineNr">258 </span><span class="subxFunction">lookup</span>: <span class="subxComment"># h: (handle _T) -&gt; result/eax: (addr _T)</span>
321 <span id="L259" class="LineNr">259 </span> <span class="subxS1Comment"># . prologue</span>
322 <span id="L260" class="LineNr">260 </span> 55/push-ebp
323 <span id="L261" class="LineNr">261 </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>
324 <span id="L262" class="LineNr">262 </span> <span class="subxS1Comment"># . save registers</span>
325 <span id="L263" class="LineNr">263 </span> 51/push-ecx
326 <span id="L264" class="LineNr">264 </span> <span class="subxComment"># eax = 0</span>
327 <span id="L265" class="LineNr">265 </span> 31/xor 3/mod/direct 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># clear eax</span>
328 <span id="L266" class="LineNr">266 </span> <span class="subxComment"># ecx = handle-&gt;alloc_id</span>
329 <span id="L267" class="LineNr">267 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+8) to ecx</span>
330 <span id="L268" class="LineNr">268 </span> <span class="subxComment"># if (ecx == 0) return 0</span>
331 <span id="L269" class="LineNr">269 </span> 81 7/subop/compare 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> 0/imm32 <span class="subxComment"># compare ecx</span>
332 <span id="L270" class="LineNr">270 </span> 74/jump-if-= $lookup:end/disp8
333 <span id="L271" class="LineNr">271 </span> <span class="subxComment"># eax = handle-&gt;address (payload)</span>
334 <span id="L272" class="LineNr">272 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+12) to eax</span>
335 <span id="L273" class="LineNr">273 </span> <span class="subxComment"># if (ecx != *eax) abort</span>
336 <span id="L274" class="LineNr">274 </span> 39/compare 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"># compare *eax and ecx</span>
337 <span id="L275" class="LineNr">275 </span> 75/jump-if-!= $lookup:abort/disp8
338 <span id="L276" class="LineNr">276 </span> <span class="subxComment"># add 4 to eax</span>
339 <span id="L277" class="LineNr">277 </span> 05/add-to-eax 4/imm32
340 <span id="L278" class="LineNr">278 </span><span class="Constant">$lookup:end</span>:
341 <span id="L279" class="LineNr">279 </span> <span class="subxS1Comment"># . restore registers</span>
342 <span id="L280" class="LineNr">280 </span> 59/pop-to-ecx
343 <span id="L281" class="LineNr">281 </span> <span class="subxS1Comment"># . epilogue</span>
344 <span id="L282" class="LineNr">282 </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>
345 <span id="L283" class="LineNr">283 </span> 5d/pop-to-ebp
346 <span id="L284" class="LineNr">284 </span> c3/return
347 <span id="L285" class="LineNr">285 </span>
348 <span id="L286" class="LineNr">286 </span><span class="Constant">$lookup:abort</span>:
349 <span id="L287" class="LineNr">287 </span> <span class="subxS1Comment"># . _write(2/stderr, msg)</span>
350 <span id="L288" class="LineNr">288 </span> <span class="subxS2Comment"># . . push args</span>
351 <span id="L289" class="LineNr">289 </span> 68/push <span class="Constant">&quot;lookup failed\n&quot;</span>/imm32
352 <span id="L290" class="LineNr">290 </span> 68/push 2/imm32/stderr
353 <span id="L291" class="LineNr">291 </span> <span class="subxS2Comment"># . . call</span>
354 <span id="L292" class="LineNr">292 </span> e8/call <a href='101_write.subx.html#L12'>_write</a>/disp32
355 <span id="L293" class="LineNr">293 </span> <span class="subxS2Comment"># . . discard args</span>
356 <span id="L294" class="LineNr">294 </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>
357 <span id="L295" class="LineNr">295 </span> <span class="subxS1Comment"># . syscall_exit(1)</span>
358 <span id="L296" class="LineNr">296 </span> bb/copy-to-ebx 1/imm32/exit-status
359 <span id="L297" class="LineNr">297 </span> e8/call <a href='000init.subx.html#L18'>syscall_exit</a>/disp32
360 <span id="L298" class="LineNr">298 </span>
361 <span id="L299" class="LineNr">299 </span><span class="subxTest">test-lookup-success</span>:
362 <span id="L300" class="LineNr">300 </span> <span class="subxS1Comment"># . prologue</span>
363 <span id="L301" class="LineNr">301 </span> 55/push-ebp
364 <span id="L302" class="LineNr">302 </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>
365 <span id="L303" class="LineNr">303 </span> <span class="subxComment"># var ad/ebx: allocation-descriptor</span>
366 <span id="L304" class="LineNr">304 </span> 68/push 0/imm32/limit
367 <span id="L305" class="LineNr">305 </span> 68/push 0/imm32/curr
368 <span id="L306" class="LineNr">306 </span> 89/copy 3/mod/direct 3/rm32/ebx <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 ebx</span>
369 <span id="L307" class="LineNr">307 </span> <span class="subxComment"># ad = new-segment(512)</span>
370 <span id="L308" class="LineNr">308 </span> <span class="subxS2Comment"># . . push args</span>
371 <span id="L309" class="LineNr">309 </span> 53/push-ebx
372 <span id="L310" class="LineNr">310 </span> 68/push 0x200/imm32
373 <span id="L311" class="LineNr">311 </span> <span class="subxS2Comment"># . . call</span>
374 <span id="L312" class="LineNr">312 </span> e8/call <a href='104new-segment.subx.html#L40'>new-segment</a>/disp32
375 <span id="L313" class="LineNr">313 </span> <span class="subxS2Comment"># . . discard args</span>
376 <span id="L314" class="LineNr">314 </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>
377 <span id="L315" class="LineNr">315 </span> <span class="subxComment"># var handle/ecx: handle</span>
378 <span id="L316" class="LineNr">316 </span> 68/push 0/imm32/address
379 <span id="L317" class="LineNr">317 </span> 68/push 0/imm32/alloc-id
380 <span id="L318" class="LineNr">318 </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>
381 <span id="L319" class="LineNr">319 </span> <span class="subxComment"># var old-top/edx = ad-&gt;curr</span>
382 <span id="L320" class="LineNr">320 </span> 8b/copy 0/mod/indirect 3/rm32/ebx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 2/r32/edx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy *ebx to edx</span>
383 <span id="L321" class="LineNr">321 </span> <span class="subxComment"># allocate-raw(ad, 2, handle)</span>
384 <span id="L322" class="LineNr">322 </span> <span class="subxS2Comment"># . . push args</span>
385 <span id="L323" class="LineNr">323 </span> 51/push-ecx
386 <span id="L324" class="LineNr">324 </span> 68/push 2/imm32/size
387 <span id="L325" class="LineNr">325 </span> 53/push-ebx
388 <span id="L326" class="LineNr">326 </span> <span class="subxS2Comment"># . . call</span>
389 <span id="L327" class="LineNr">327 </span> e8/call <a href='120allocate.subx.html#L103'>allocate-raw</a>/disp32
390 <span id="L328" class="LineNr">328 </span> <span class="subxS2Comment"># . . discard args</span>
391 <span id="L329" class="LineNr">329 </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>
392 <span id="L330" class="LineNr">330 </span> <span class="subxComment"># eax = lookup(handle)</span>
393 <span id="L331" class="LineNr">331 </span> <span class="subxS2Comment"># . . push args</span>
394 <span id="L332" class="LineNr">332 </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>
395 <span id="L333" class="LineNr">333 </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>
396 <span id="L334" class="LineNr">334 </span> <span class="subxS2Comment"># . . call</span>
397 <span id="L335" class="LineNr">335 </span> e8/call <a href='120allocate.subx.html#L258'>lookup</a>/disp32
398 <span id="L336" class="LineNr">336 </span> <span class="subxS2Comment"># . . discard args</span>
399 <span id="L337" class="LineNr">337 </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>
400 <span id="L338" class="LineNr">338 </span> <span class="subxComment"># eax contains old top of heap, except skipping the alloc-id in the payload</span>
401 <span id="L339" class="LineNr">339 </span> <span class="subxS1Comment"># . check-ints-equal(eax, old-top+4, msg)</span>
402 <span id="L340" class="LineNr">340 </span> <span class="subxS2Comment"># . . push args</span>
403 <span id="L341" class="LineNr">341 </span> 68/push <span class="Constant">&quot;F - test-lookup-success&quot;</span>/imm32
404 <span id="L342" class="LineNr">342 </span> 81 0/subop/add 3/mod/direct 2/rm32/edx <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 edx</span>
405 <span id="L343" class="LineNr">343 </span> 52/push-edx
406 <span id="L344" class="LineNr">344 </span> 50/push-eax
407 <span id="L345" class="LineNr">345 </span> <span class="subxS2Comment"># . . call</span>
408 <span id="L346" class="LineNr">346 </span> e8/call <a href='102test.subx.html#L23'>check-ints-equal</a>/disp32
409 <span id="L347" class="LineNr">347 </span> <span class="subxS2Comment"># . . discard args</span>
410 <span id="L348" class="LineNr">348 </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>
411 <span id="L349" class="LineNr">349 </span> <span class="subxComment"># clean up</span>
412 <span id="L350" class="LineNr">350 </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"><a href='120allocate.subx.html#L37'>Next-alloc-id</a></span>/disp32 0x100/imm32 <span class="subxComment"># copy to *Next-alloc-id</span>
413 <span id="L351" class="LineNr">351 </span> <span class="subxS1Comment"># . reclaim locals</span>
414 <span id="L352" class="LineNr">352 </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> 0x10/imm32 <span class="subxComment"># add to esp</span>
415 <span id="L353" class="LineNr">353 </span> <span class="subxS1Comment"># . epilogue</span>
416 <span id="L354" class="LineNr">354 </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>
417 <span id="L355" class="LineNr">355 </span> 5d/pop-to-ebp
418 <span id="L356" class="LineNr">356 </span> c3/return
419 <span id="L357" class="LineNr">357 </span>
420 <span id="L358" class="LineNr">358 </span><span class="subxTest">test-lookup-null-returns-null</span>:
421 <span id="L359" class="LineNr">359 </span> <span class="subxS1Comment"># . prologue</span>
422 <span id="L360" class="LineNr">360 </span> 55/push-ebp
423 <span id="L361" class="LineNr">361 </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>
424 <span id="L362" class="LineNr">362 </span> <span class="subxComment"># var handle/ecx: handle</span>
425 <span id="L363" class="LineNr">363 </span> 68/push 0/imm32/address
426 <span id="L364" class="LineNr">364 </span> 68/push 0/imm32/alloc-id
427 <span id="L365" class="LineNr">365 </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>
428 <span id="L366" class="LineNr">366 </span> <span class="subxComment"># eax = lookup(handle)</span>
429 <span id="L367" class="LineNr">367 </span> <span class="subxS2Comment"># . . push args</span>
430 <span id="L368" class="LineNr">368 </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>
431 <span id="L369" class="LineNr">369 </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>
432 <span id="L370" class="LineNr">370 </span> <span class="subxS2Comment"># . . call</span>
433 <span id="L371" class="LineNr">371 </span> e8/call <a href='120allocate.subx.html#L258'>lookup</a>/disp32
434 <span id="L372" class="LineNr">372 </span> <span class="subxS2Comment"># . . discard args</span>
435 <span id="L373" class="LineNr">373 </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>
436 <span id="L374" class="LineNr">374 </span> <span class="subxComment"># check-ints-equal(eax, 0, msg)</span>
437 <span id="L375" class="LineNr">375 </span> <span class="subxS2Comment"># . . push args</span>
438 <span id="L376" class="LineNr">376 </span> 68/push <span class="Constant">&quot;F - test-lookup-null-returns-null&quot;</span>/imm32
439 <span id="L377" class="LineNr">377 </span> 68/push 0/imm32
440 <span id="L378" class="LineNr">378 </span> 50/push-eax
441 <span id="L379" class="LineNr">379 </span> <span class="subxS2Comment"># . . call</span>
442 <span id="L380" class="LineNr">380 </span> e8/call <a href='102test.subx.html#L23'>check-ints-equal</a>/disp32
443 <span id="L381" class="LineNr">381 </span> <span class="subxS2Comment"># . . discard args</span>
444 <span id="L382" class="LineNr">382 </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>
445 <span id="L383" class="LineNr">383 </span> <span class="subxS1Comment"># . reclaim locals</span>
446 <span id="L384" class="LineNr">384 </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>
447 <span id="L385" class="LineNr">385 </span> <span class="subxS1Comment"># . epilogue</span>
448 <span id="L386" class="LineNr">386 </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>
449 <span id="L387" class="LineNr">387 </span> 5d/pop-to-ebp
450 <span id="L388" class="LineNr">388 </span> c3/return
451 <span id="L389" class="LineNr">389 </span>
452 <span id="L390" class="LineNr">390 </span><span class="subxMinorFunction">_pending-test-lookup-failure</span>:
453 <span id="L391" class="LineNr">391 </span> <span class="subxS1Comment"># . prologue</span>
454 <span id="L392" class="LineNr">392 </span> 55/push-ebp
455 <span id="L393" class="LineNr">393 </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>
456 <span id="L394" class="LineNr">394 </span> <span class="subxComment"># var heap/esi: allocation-descriptor</span>
457 <span id="L395" class="LineNr">395 </span> 68/push 0/imm32/limit
458 <span id="L396" class="LineNr">396 </span> 68/push 0/imm32/curr
459 <span id="L397" class="LineNr">397 </span> 89/copy 3/mod/direct 6/rm32/esi <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 esi</span>
460 <span id="L398" class="LineNr">398 </span> <span class="subxComment"># heap = new-segment(512)</span>
461 <span id="L399" class="LineNr">399 </span> <span class="subxS2Comment"># . . push args</span>
462 <span id="L400" class="LineNr">400 </span> 56/push-esi
463 <span id="L401" class="LineNr">401 </span> 68/push 0x200/imm32
464 <span id="L402" class="LineNr">402 </span> <span class="subxS2Comment"># . . call</span>
465 <span id="L403" class="LineNr">403 </span> e8/call <a href='104new-segment.subx.html#L40'>new-segment</a>/disp32
466 <span id="L404" class="LineNr">404 </span> <span class="subxS2Comment"># . . discard args</span>
467 <span id="L405" class="LineNr">405 </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>
468 <span id="L406" class="LineNr">406 </span> <span class="subxComment"># var h1/ecx: handle</span>
469 <span id="L407" class="LineNr">407 </span> 68/push 0/imm32/address
470 <span id="L408" class="LineNr">408 </span> 68/push 0/imm32/alloc-id
471 <span id="L409" class="LineNr">409 </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>
472 <span id="L410" class="LineNr">410 </span> <span class="subxComment"># var old_top/ebx = heap-&gt;curr</span>
473 <span id="L411" class="LineNr">411 </span> 8b/copy 0/mod/indirect 6/rm32/esi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 3/r32/ebx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy *esi to ebx</span>
474 <span id="L412" class="LineNr">412 </span> <span class="subxComment"># first allocation, to h1</span>
475 <span id="L413" class="LineNr">413 </span> <span class="subxS1Comment"># . allocate(heap, 2, h1)</span>
476 <span id="L414" class="LineNr">414 </span> <span class="subxS2Comment"># . . push args</span>
477 <span id="L415" class="LineNr">415 </span> 51/push-ecx
478 <span id="L416" class="LineNr">416 </span> 68/push 2/imm32/size
479 <span id="L417" class="LineNr">417 </span> 56/push-esi
480 <span id="L418" class="LineNr">418 </span> <span class="subxS2Comment"># . . call</span>
481 <span id="L419" class="LineNr">419 </span> e8/call <a href='120allocate.subx.html#L66'>allocate</a>/disp32
482 <span id="L420" class="LineNr">420 </span> <span class="subxS2Comment"># . . discard args</span>
483 <span id="L421" class="LineNr">421 </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>
484 <span id="L422" class="LineNr">422 </span> <span class="subxComment"># reset heap-&gt;curr to mimic reclamation</span>
485 <span id="L423" class="LineNr">423 </span> 89/copy 0/mod/indirect 6/rm32/esi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 3/r32/ebx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebx to *esi</span>
486 <span id="L424" class="LineNr">424 </span> <span class="subxComment"># second allocation that returns the same address as the first</span>
487 <span id="L425" class="LineNr">425 </span> <span class="subxComment"># var h2/edx: handle</span>
488 <span id="L426" class="LineNr">426 </span> 68/push 0/imm32/address
489 <span id="L427" class="LineNr">427 </span> 68/push 0/imm32/alloc-id
490 <span id="L428" class="LineNr">428 </span> 89/copy 3/mod/direct 2/rm32/edx <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 edx</span>
491 <span id="L429" class="LineNr">429 </span> <span class="subxS1Comment"># . allocate(heap, 2, h2)</span>
492 <span id="L430" class="LineNr">430 </span> <span class="subxS2Comment"># . . push args</span>
493 <span id="L431" class="LineNr">431 </span> 52/push-edx
494 <span id="L432" class="LineNr">432 </span> 68/push 2/imm32/size
495 <span id="L433" class="LineNr">433 </span> 56/push-esi
496 <span id="L434" class="LineNr">434 </span> <span class="subxS2Comment"># . . call</span>
497 <span id="L435" class="LineNr">435 </span> e8/call <a href='120allocate.subx.html#L66'>allocate</a>/disp32
498 <span id="L436" class="LineNr">436 </span> <span class="subxS2Comment"># . . discard args</span>
499 <span id="L437" class="LineNr">437 </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>
500 <span id="L438" class="LineNr">438 </span> <span class="subxComment"># check-ints-equal(h1-&gt;address, h2-&gt;address, msg)</span>
501 <span id="L439" class="LineNr">439 </span> <span class="subxS2Comment"># . . push args</span>
502 <span id="L440" class="LineNr">440 </span> 68/push <span class="Constant">&quot;F - test-lookup-failure&quot;</span>/imm32
503 <span id="L441" class="LineNr">441 </span> ff 6/subop/push 1/mod/*+disp8 2/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 *(edx+4)</span>
504 <span id="L442" class="LineNr">442 </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>
505 <span id="L443" class="LineNr">443 </span> <span class="subxS2Comment"># . . call</span>
506 <span id="L444" class="LineNr">444 </span> e8/call <a href='102test.subx.html#L23'>check-ints-equal</a>/disp32
507 <span id="L445" class="LineNr">445 </span> <span class="subxS2Comment"># . . discard args</span>
508 <span id="L446" class="LineNr">446 </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>
509 <span id="L447" class="LineNr">447 </span> <span class="subxComment"># lookup(h1) should crash</span>
510 <span id="L448" class="LineNr">448 </span> <span class="subxS2Comment"># . . push args</span>
511 <span id="L449" class="LineNr">449 </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>
512 <span id="L450" class="LineNr">450 </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>
513 <span id="L451" class="LineNr">451 </span> <span class="subxS2Comment"># . . call</span>
514 <span id="L452" class="LineNr">452 </span> e8/call <a href='120allocate.subx.html#L258'>lookup</a>/disp32
515 <span id="L453" class="LineNr">453 </span> <span class="subxComment"># should never get past this point</span>
516 <span id="L454" class="LineNr">454 </span> <span class="subxS2Comment"># . . discard args</span>
517 <span id="L455" class="LineNr">455 </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>
518 <span id="L456" class="LineNr">456 </span> <span class="subxComment"># clean up</span>
519 <span id="L457" class="LineNr">457 </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"><a href='120allocate.subx.html#L37'>Next-alloc-id</a></span>/disp32 0x100/imm32 <span class="subxComment"># copy to *Next-alloc-id</span>
520 <span id="L458" class="LineNr">458 </span> <span class="subxS1Comment"># . reclaim locals</span>
521 <span id="L459" class="LineNr">459 </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>
522 <span id="L460" class="LineNr">460 </span> <span class="subxS1Comment"># . epilogue</span>
523 <span id="L461" class="LineNr">461 </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>
524 <span id="L462" class="LineNr">462 </span> 5d/pop-to-ebp
525 <span id="L463" class="LineNr">463 </span> c3/return
526 <span id="L464" class="LineNr">464 </span>
527 <span id="L465" class="LineNr">465 </span><span class="subxComment"># when comparing handles, just treat them as pure values</span>
528 <span id="L466" class="LineNr">466 </span><span class="subxFunction">handle-equal?</span>: <span class="subxComment"># a: (handle _T), b: (handle _T) -&gt; result/eax: boolean</span>
529 <span id="L467" class="LineNr">467 </span> <span class="subxS1Comment"># . prologue</span>
530 <span id="L468" class="LineNr">468 </span> 55/push-ebp
531 <span id="L469" class="LineNr">469 </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>
532 <span id="L470" class="LineNr">470 </span> <span class="subxS1Comment"># . save registers</span>
533 <span id="L471" class="LineNr">471 </span> 51/push-ecx
534 <span id="L472" class="LineNr">472 </span> <span class="subxComment"># eax = false</span>
535 <span id="L473" class="LineNr">473 </span> b8/copy-to-eax 0/imm32/false
536 <span id="L474" class="LineNr">474 </span><span class="Constant">$handle-equal?:compare-alloc-id</span>:
537 <span id="L475" class="LineNr">475 </span> <span class="subxComment"># ecx = a-&gt;alloc_id</span>
538 <span id="L476" class="LineNr">476 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+8) to ecx</span>
539 <span id="L477" class="LineNr">477 </span> <span class="subxComment"># if (ecx != b-&gt;alloc_id) return false</span>
540 <span id="L478" class="LineNr">478 </span> 39/compare 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx 0x10/disp8 <span class="Normal"> . </span> <span class="subxComment"># compare ecx and *(ebp+16)</span>
541 <span id="L479" class="LineNr">479 </span> 75/jump-if-!= $handle-equal?:end/disp8
542 <span id="L480" class="LineNr">480 </span><span class="Constant">$handle-equal?:compare-address</span>:
543 <span id="L481" class="LineNr">481 </span> <span class="subxComment"># ecx = handle-&gt;address</span>
544 <span id="L482" class="LineNr">482 </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>
545 <span id="L483" class="LineNr">483 </span> <span class="subxComment"># if (ecx != b-&gt;address) return false</span>
546 <span id="L484" class="LineNr">484 </span> 39/compare 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx 0x14/disp8 <span class="Normal"> . </span> <span class="subxComment"># compare ecx and *(ebp+20)</span>
547 <span id="L485" class="LineNr">485 </span> 75/jump-if-!= $handle-equal?:end/disp8
548 <span id="L486" class="LineNr">486 </span><span class="Constant">$handle-equal?:return-true</span>:
549 <span id="L487" class="LineNr">487 </span> <span class="subxComment"># return true</span>
550 <span id="L488" class="LineNr">488 </span> b8/copy-to-eax 1/imm32/true
551 <span id="L489" class="LineNr">489 </span><span class="Constant">$handle-equal?:end</span>:
552 <span id="L490" class="LineNr">490 </span> <span class="subxS1Comment"># . restore registers</span>
553 <span id="L491" class="LineNr">491 </span> 59/pop-to-ecx
554 <span id="L492" class="LineNr">492 </span> <span class="subxS1Comment"># . epilogue</span>
555 <span id="L493" class="LineNr">493 </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>
556 <span id="L494" class="LineNr">494 </span> 5d/pop-to-ebp
557 <span id="L495" class="LineNr">495 </span> c3/return
558 <span id="L496" class="LineNr">496 </span>
559 <span id="L497" class="LineNr">497 </span><span class="subxFunction">copy-handle</span>: <span class="subxComment"># src: (handle _T), dest: (addr handle _T)</span>
560 <span id="L498" class="LineNr">498 </span> <span class="subxS1Comment"># . prologue</span>
561 <span id="L499" class="LineNr">499 </span> 55/push-ebp
562 <span id="L500" class="LineNr">500 </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>
563 <span id="L501" class="LineNr">501 </span> <span class="subxS1Comment"># . save registers</span>
564 <span id="L502" class="LineNr">502 </span> 50/push-eax
565 <span id="L503" class="LineNr">503 </span> 51/push-ecx
566 <span id="L504" class="LineNr">504 </span> <span class="subxComment"># ecx = dest</span>
567 <span id="L505" class="LineNr">505 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx 0x10/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+16) to ecx</span>
568 <span id="L506" class="LineNr">506 </span> <span class="subxComment"># *dest = src</span>
569 <span id="L507" class="LineNr">507 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+8) to eax</span>
570 <span id="L508" class="LineNr">508 </span> 89/copy 0/mod/indirect 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy eax to *ecx</span>
571 <span id="L509" class="LineNr">509 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+12) to eax</span>
572 <span id="L510" class="LineNr">510 </span> 89/copy 1/mod/*+disp8 1/rm32/ecx <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 *(ecx+4)</span>
573 <span id="L511" class="LineNr">511 </span><span class="Constant">$copy-handle:end</span>:
574 <span id="L512" class="LineNr">512 </span> <span class="subxS1Comment"># . restore registers</span>
575 <span id="L513" class="LineNr">513 </span> 59/pop-to-ecx
576 <span id="L514" class="LineNr">514 </span> 58/pop-to-eax
577 <span id="L515" class="LineNr">515 </span> <span class="subxS1Comment"># . epilogue</span>
578 <span id="L516" class="LineNr">516 </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>
579 <span id="L517" class="LineNr">517 </span> 5d/pop-to-ebp
580 <span id="L518" class="LineNr">518 </span> c3/return
581 <span id="L519" class="LineNr">519 </span>
582 <span id="L520" class="LineNr">520 </span><span class="subxComment"># helper: create a nested allocation descriptor (useful for tests)</span>
583 <span id="L521" class="LineNr">521 </span><span class="subxFunction">allocate-region</span>: <span class="subxComment"># ad: (addr allocation-descriptor), n: int, out: (addr handle allocation-descriptor)</span>
584 <span id="L522" class="LineNr">522 </span> <span class="subxS1Comment"># . prologue</span>
585 <span id="L523" class="LineNr">523 </span> 55/push-ebp
586 <span id="L524" class="LineNr">524 </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>
587 <span id="L525" class="LineNr">525 </span> <span class="subxS1Comment"># . save registers</span>
588 <span id="L526" class="LineNr">526 </span> 50/push-eax
589 <span id="L527" class="LineNr">527 </span> 51/push-ecx
590 <span id="L528" class="LineNr">528 </span> <span class="subxComment"># allocate(ad, n, out)</span>
591 <span id="L529" class="LineNr">529 </span> <span class="subxS2Comment"># . . push args</span>
592 <span id="L530" class="LineNr">530 </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>
593 <span id="L531" class="LineNr">531 </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>
594 <span id="L532" class="LineNr">532 </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>
595 <span id="L533" class="LineNr">533 </span> <span class="subxS2Comment"># . . call</span>
596 <span id="L534" class="LineNr">534 </span> e8/call <a href='120allocate.subx.html#L66'>allocate</a>/disp32
597 <span id="L535" class="LineNr">535 </span> <span class="subxS2Comment"># . . discard args</span>
598 <span id="L536" class="LineNr">536 </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>
599 <span id="L537" class="LineNr">537 </span> <span class="subxComment"># eax = out-&gt;payload</span>
600 <span id="L538" class="LineNr">538 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax 0x10/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+16) to eax</span>
601 <span id="L539" class="LineNr">539 </span> 8b/copy 1/mod/*+disp8 0/rm32/eax <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+4) to eax</span>
602 <span id="L540" class="LineNr">540 </span> <span class="subxComment"># skip payload-&gt;allocid</span>
603 <span id="L541" class="LineNr">541 </span> 05/add-to-eax 4/imm32
604 <span id="L542" class="LineNr">542 </span> <span class="subxComment"># if (eax == 0) abort</span>
605 <span id="L543" class="LineNr">543 </span> 3d/compare-eax-and 0/imm32
606 <span id="L544" class="LineNr">544 </span> 74/jump-if-= $allocate-region:abort/disp8
607 <span id="L545" class="LineNr">545 </span> <span class="subxComment"># earmark 8 bytes at the start for a new allocation descriptor</span>
608 <span id="L546" class="LineNr">546 </span> <span class="subxS1Comment"># . *eax = eax + 8</span>
609 <span id="L547" class="LineNr">547 </span> 89/copy 3/mod/direct 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy eax to ecx</span>
610 <span id="L548" class="LineNr">548 </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> 8/imm32 <span class="subxComment"># add to ecx</span>
611 <span id="L549" class="LineNr">549 </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>
612 <span id="L550" class="LineNr">550 </span> <span class="subxS1Comment"># . *(eax+4) = eax + n</span>
613 <span id="L551" class="LineNr">551 </span> 89/copy 3/mod/direct 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy eax to ecx</span>
614 <span id="L552" class="LineNr">552 </span> 03/add 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"># add *(ebp+12) to ecx</span>
615 <span id="L553" class="LineNr">553 </span> 89/copy 1/mod/*+disp8 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy ecx to *(eax+4)</span>
616 <span id="L554" class="LineNr">554 </span> <span class="subxS1Comment"># . restore registers</span>
617 <span id="L555" class="LineNr">555 </span> 59/pop-to-ecx
618 <span id="L556" class="LineNr">556 </span> 58/pop-to-eax
619 <span id="L557" class="LineNr">557 </span> <span class="subxS1Comment"># . epilogue</span>
620 <span id="L558" class="LineNr">558 </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>
621 <span id="L559" class="LineNr">559 </span> 5d/pop-to-ebp
622 <span id="L560" class="LineNr">560 </span> c3/return
623 <span id="L561" class="LineNr">561 </span>
624 <span id="L562" class="LineNr">562 </span><span class="subxComment"># We could create a more general '$abort' jump target, but then we'd need to do</span>
625 <span id="L563" class="LineNr">563 </span><span class="subxComment"># a conditional jump followed by loading the error message and an unconditional</span>
626 <span id="L564" class="LineNr">564 </span><span class="subxComment"># jump. Or we'd need to unconditionally load the error message before a</span>
627 <span id="L565" class="LineNr">565 </span><span class="subxComment"># conditional jump, even if it's unused the vast majority of the time. This way</span>
628 <span id="L566" class="LineNr">566 </span><span class="subxComment"># we bloat a potentially cold segment in RAM so we can abort with a single</span>
629 <span id="L567" class="LineNr">567 </span><span class="subxComment"># instruction.</span>
630 <span id="L568" class="LineNr">568 </span><span class="Constant">$allocate-region:abort</span>:
631 <span id="L569" class="LineNr">569 </span> <span class="subxS1Comment"># . _write(2/stderr, error)</span>
632 <span id="L570" class="LineNr">570 </span> <span class="subxS2Comment"># . . push args</span>
633 <span id="L571" class="LineNr">571 </span> 68/push <span class="Constant">&quot;allocate-region: failed to allocate\n&quot;</span>/imm32
634 <span id="L572" class="LineNr">572 </span> 68/push 2/imm32/stderr
635 <span id="L573" class="LineNr">573 </span> <span class="subxS2Comment"># . . call</span>
636 <span id="L574" class="LineNr">574 </span> e8/call <a href='101_write.subx.html#L12'>_write</a>/disp32
637 <span id="L575" class="LineNr">575 </span> <span class="subxS2Comment"># . . discard args</span>
638 <span id="L576" class="LineNr">576 </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>
639 <span id="L577" class="LineNr">577 </span> <span class="subxS1Comment"># . syscall_exit(1)</span>
640 <span id="L578" class="LineNr">578 </span> bb/copy-to-ebx 1/imm32
641 <span id="L579" class="LineNr">579 </span> e8/call <a href='000init.subx.html#L18'>syscall_exit</a>/disp32
642 <span id="L580" class="LineNr">580 </span> <span class="subxComment"># never gets here</span>
643 <span id="L581" class="LineNr">581 </span>
644 <span id="L582" class="LineNr">582 </span><span class="subxComment"># Claim the next 'n+4' bytes of memory and initialize the first 4 to n.</span>
645 <span id="L583" class="LineNr">583 </span><span class="subxComment"># Abort if there isn't enough memory in 'ad'.</span>
646 <span id="L584" class="LineNr">584 </span><span class="subxFunction">allocate-array</span>: <span class="subxComment"># ad: (addr allocation-descriptor), n: int, out: (addr handle _)</span>
647 <span id="L585" class="LineNr">585 </span> <span class="subxS1Comment"># . prologue</span>
648 <span id="L586" class="LineNr">586 </span> 55/push-ebp
649 <span id="L587" class="LineNr">587 </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>
650 <span id="L588" class="LineNr">588 </span> <span class="subxS1Comment"># . save registers</span>
651 <span id="L589" class="LineNr">589 </span> 50/push-eax
652 <span id="L590" class="LineNr">590 </span> 51/push-ecx
653 <span id="L591" class="LineNr">591 </span> 52/push-edx
654 <span id="L592" class="LineNr">592 </span> <span class="subxComment"># ecx = n</span>
655 <span id="L593" class="LineNr">593 </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>
656 <span id="L594" class="LineNr">594 </span> <span class="subxComment"># var size/edx: int = n+4</span>
657 <span id="L595" class="LineNr">595 </span> 8d/copy-address 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>
658 <span id="L596" class="LineNr">596 </span> <span class="subxComment"># allocate(ad, size, out)</span>
659 <span id="L597" class="LineNr">597 </span> <span class="subxS2Comment"># . . push args</span>
660 <span id="L598" class="LineNr">598 </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>
661 <span id="L599" class="LineNr">599 </span> 52/push-edx
662 <span id="L600" class="LineNr">600 </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>
663 <span id="L601" class="LineNr">601 </span> <span class="subxS2Comment"># . . call</span>
664 <span id="L602" class="LineNr">602 </span> e8/call <a href='120allocate.subx.html#L66'>allocate</a>/disp32
665 <span id="L603" class="LineNr">603 </span> <span class="subxS2Comment"># . . discard args</span>
666 <span id="L604" class="LineNr">604 </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>
667 <span id="L605" class="LineNr">605 </span> <span class="subxComment"># *out-&gt;payload = n</span>
668 <span id="L606" class="LineNr">606 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax 0x10/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+16) to eax</span>
669 <span id="L607" class="LineNr">607 </span> 8b/copy 1/mod/*+disp8 0/rm32/eax <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+4) to eax</span>
670 <span id="L608" class="LineNr">608 </span> <span class="subxS1Comment"># . skip payload-&gt;allocid</span>
671 <span id="L609" class="LineNr">609 </span> 05/add-to-eax 4/imm32
672 <span id="L610" class="LineNr">610 </span> <span class="subxS1Comment"># .</span>
673 <span id="L611" class="LineNr">611 </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>
674 <span id="L612" class="LineNr">612 </span><span class="Constant">$allocate-array:end</span>:
675 <span id="L613" class="LineNr">613 </span> <span class="subxS1Comment"># . restore registers</span>
676 <span id="L614" class="LineNr">614 </span> 5a/pop-to-edx
677 <span id="L615" class="LineNr">615 </span> 59/pop-to-ecx
678 <span id="L616" class="LineNr">616 </span> 58/pop-to-eax
679 <span id="L617" class="LineNr">617 </span> <span class="subxS1Comment"># . epilogue</span>
680 <span id="L618" class="LineNr">618 </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>
681 <span id="L619" class="LineNr">619 </span> 5d/pop-to-ebp
682 <span id="L620" class="LineNr">620 </span> c3/return
683 <span id="L621" class="LineNr">621 </span>
684 <span id="L622" class="LineNr">622 </span><span class="subxTest">test-allocate-array</span>:
685 <span id="L623" class="LineNr">623 </span> <span class="subxS1Comment"># . prologue</span>
686 <span id="L624" class="LineNr">624 </span> 55/push-ebp
687 <span id="L625" class="LineNr">625 </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>
688 <span id="L626" class="LineNr">626 </span> <span class="subxComment"># var ad/ecx: allocation-descriptor</span>
689 <span id="L627" class="LineNr">627 </span> 68/push 0/imm32/limit
690 <span id="L628" class="LineNr">628 </span> 68/push 0/imm32/curr
691 <span id="L629" class="LineNr">629 </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>
692 <span id="L630" class="LineNr">630 </span> <span class="subxComment"># ad = new-segment(512)</span>
693 <span id="L631" class="LineNr">631 </span> <span class="subxS2Comment"># . . push args</span>
694 <span id="L632" class="LineNr">632 </span> 51/push-ecx
695 <span id="L633" class="LineNr">633 </span> 68/push 0x200/imm32
696 <span id="L634" class="LineNr">634 </span> <span class="subxS2Comment"># . . call</span>
697 <span id="L635" class="LineNr">635 </span> e8/call <a href='104new-segment.subx.html#L40'>new-segment</a>/disp32
698 <span id="L636" class="LineNr">636 </span> <span class="subxS2Comment"># . . discard args</span>
699 <span id="L637" class="LineNr">637 </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>
700 <span id="L638" class="LineNr">638 </span> <span class="subxComment"># var expected-payload/ebx = ad-&gt;curr</span>
701 <span id="L639" class="LineNr">639 </span> 8b/copy 0/mod/indirect 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 3/r32/ebx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy *ecx to ebx</span>
702 <span id="L640" class="LineNr">640 </span> <span class="subxComment"># var h/edx: handle = {0, 0}</span>
703 <span id="L641" class="LineNr">641 </span> 68/push 0/imm32
704 <span id="L642" class="LineNr">642 </span> 68/push 0/imm32
705 <span id="L643" class="LineNr">643 </span> 89/copy 3/mod/direct 2/rm32/edx <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 edx</span>
706 <span id="L644" class="LineNr">644 </span> <span class="subxComment"># *Next-alloc-id = 0x34</span>
707 <span id="L645" class="LineNr">645 </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"><a href='120allocate.subx.html#L37'>Next-alloc-id</a></span>/disp32 0x34/imm32 <span class="subxComment"># copy to *Next-alloc-id</span>
708 <span id="L646" class="LineNr">646 </span> <span class="subxComment"># allocate-array(ad, 3, h)</span>
709 <span id="L647" class="LineNr">647 </span> <span class="subxS2Comment"># . . push args</span>
710 <span id="L648" class="LineNr">648 </span> 52/push-edx
711 <span id="L649" class="LineNr">649 </span> 68/push 3/imm32
712 <span id="L650" class="LineNr">650 </span> 51/push-ecx
713 <span id="L651" class="LineNr">651 </span> <span class="subxS2Comment"># . . call</span>
714 <span id="L652" class="LineNr">652 </span> e8/call <a href='120allocate.subx.html#L584'>allocate-array</a>/disp32
715 <span id="L653" class="LineNr">653 </span> <span class="subxS2Comment"># . . discard args</span>
716 <span id="L654" class="LineNr">654 </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>
717 <span id="L655" class="LineNr">655 </span> <span class="subxComment"># check-ints-equal(h-&gt;alloc-id, 0x34, msg)</span>
718 <span id="L656" class="LineNr">656 </span> <span class="subxS2Comment"># . . push args</span>
719 <span id="L657" class="LineNr">657 </span> 68/push <span class="Constant">&quot;F - <a href='120allocate.subx.html#L622'>test-allocate-array</a>: sets alloc-id in handle&quot;</span>/imm32
720 <span id="L658" class="LineNr">658 </span> 68/push 0x34/imm32
721 <span id="L659" class="LineNr">659 </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>
722 <span id="L660" class="LineNr">660 </span> <span class="subxS2Comment"># . . call</span>
723 <span id="L661" class="LineNr">661 </span> e8/call <a href='102test.subx.html#L23'>check-ints-equal</a>/disp32
724 <span id="L662" class="LineNr">662 </span> <span class="subxS2Comment"># . . discard args</span>
725 <span id="L663" class="LineNr">663 </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>
726 <span id="L664" class="LineNr">664 </span> <span class="subxComment"># check-ints-equal(h-&gt;payload, expected-payload, msg)</span>
727 <span id="L665" class="LineNr">665 </span> <span class="subxS2Comment"># . . push args</span>
728 <span id="L666" class="LineNr">666 </span> 68/push <span class="Constant">&quot;F - <a href='120allocate.subx.html#L622'>test-allocate-array</a>: sets payload in handle&quot;</span>/imm32
729 <span id="L667" class="LineNr">667 </span> 53/push-ebx
730 <span id="L668" class="LineNr">668 </span> ff 6/subop/push 1/mod/*+disp8 2/rm32/edx <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 *(edx+4)</span>
731 <span id="L669" class="LineNr">669 </span> <span class="subxS2Comment"># . . call</span>
732 <span id="L670" class="LineNr">670 </span> e8/call <a href='102test.subx.html#L23'>check-ints-equal</a>/disp32
733 <span id="L671" class="LineNr">671 </span> <span class="subxS2Comment"># . . discard args</span>
734 <span id="L672" class="LineNr">672 </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>
735 <span id="L673" class="LineNr">673 </span> <span class="subxComment"># check-ints-equal(h-&gt;payload-&gt;alloc-id, 0x34, msg)</span>
736 <span id="L674" class="LineNr">674 </span> <span class="subxS2Comment"># . . push args</span>
737 <span id="L675" class="LineNr">675 </span> 68/push <span class="Constant">&quot;F - <a href='120allocate.subx.html#L622'>test-allocate-array</a>: sets alloc-id in payload&quot;</span>/imm32
738 <span id="L676" class="LineNr">676 </span> 68/push 0x34/imm32
739 <span id="L677" class="LineNr">677 </span> ff 6/subop/push 0/mod/indirect 3/rm32/ebx <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 *ebx</span>
740 <span id="L678" class="LineNr">678 </span> <span class="subxS2Comment"># . . call</span>
741 <span id="L679" class="LineNr">679 </span> e8/call <a href='102test.subx.html#L23'>check-ints-equal</a>/disp32
742 <span id="L680" class="LineNr">680 </span> <span class="subxS2Comment"># . . discard args</span>
743 <span id="L681" class="LineNr">681 </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>
744 <span id="L682" class="LineNr">682 </span> <span class="subxComment"># check-ints-equal(h-&gt;payload-&gt;size, 3, msg)</span>
745 <span id="L683" class="LineNr">683 </span> <span class="subxS2Comment"># . . push args</span>
746 <span id="L684" class="LineNr">684 </span> 68/push <span class="Constant">&quot;F - <a href='120allocate.subx.html#L622'>test-allocate-array</a>: sets array <a href='307size.subx.html#L5'>size</a> in payload&quot;</span>/imm32
747 <span id="L685" class="LineNr">685 </span> 68/push 3/imm32
748 <span id="L686" class="LineNr">686 </span> ff 6/subop/push 1/mod/*+disp8 3/rm32/ebx <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 *(ebx+4)</span>
749 <span id="L687" class="LineNr">687 </span> <span class="subxS2Comment"># . . call</span>
750 <span id="L688" class="LineNr">688 </span> e8/call <a href='102test.subx.html#L23'>check-ints-equal</a>/disp32
751 <span id="L689" class="LineNr">689 </span> <span class="subxS2Comment"># . . discard args</span>
752 <span id="L690" class="LineNr">690 </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>
753 <span id="L691" class="LineNr">691 </span> <span class="subxComment"># check-ints-equal(*Next-alloc-id, 0x35, msg)</span>
754 <span id="L692" class="LineNr">692 </span> <span class="subxS2Comment"># . . push args</span>
755 <span id="L693" class="LineNr">693 </span> 68/push <span class="Constant">&quot;F - <a href='120allocate.subx.html#L622'>test-allocate-array</a>: increments Next-alloc-id&quot;</span>/imm32
756 <span id="L694" class="LineNr">694 </span> 68/push 0x35/imm32
757 <span id="L695" class="LineNr">695 </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"><a href='120allocate.subx.html#L37'>Next-alloc-id</a></span>/disp32 <span class="subxComment"># push *Next-alloc-id</span>
758 <span id="L696" class="LineNr">696 </span> <span class="subxS2Comment"># . . call</span>
759 <span id="L697" class="LineNr">697 </span> e8/call <a href='102test.subx.html#L23'>check-ints-equal</a>/disp32
760 <span id="L698" class="LineNr">698 </span> <span class="subxS2Comment"># . . discard args</span>
761 <span id="L699" class="LineNr">699 </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>
762 <span id="L700" class="LineNr">700 </span> <span class="subxComment"># check-ints-equal(ad-&gt;curr - expected-payload, 3 + 4 for alloc-id + 4 for array size, msg)</span>
763 <span id="L701" class="LineNr">701 </span> <span class="subxS2Comment"># . . push args</span>
764 <span id="L702" class="LineNr">702 </span> 68/push <span class="Constant">&quot;F - <a href='120allocate.subx.html#L622'>test-allocate-array</a>: updates allocation descriptor&quot;</span>/imm32
765 <span id="L703" class="LineNr">703 </span> 68/push 0xb/imm32
766 <span id="L704" class="LineNr">704 </span> 8b/copy 0/mod/indirect 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy *ecx to eax</span>
767 <span id="L705" class="LineNr">705 </span> 29/subtract 3/mod/direct 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 3/r32/ebx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># subtract ebx from eax</span>
768 <span id="L706" class="LineNr">706 </span> 50/push-eax
769 <span id="L707" class="LineNr">707 </span> <span class="subxS2Comment"># . . call</span>
770 <span id="L708" class="LineNr">708 </span> e8/call <a href='102test.subx.html#L23'>check-ints-equal</a>/disp32
771 <span id="L709" class="LineNr">709 </span> <span class="subxS2Comment"># . . discard args</span>
772 <span id="L710" class="LineNr">710 </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>
773 <span id="L711" class="LineNr">711 </span> <span class="subxComment"># clean up</span>
774 <span id="L712" class="LineNr">712 </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"><a href='120allocate.subx.html#L37'>Next-alloc-id</a></span>/disp32 1/imm32 <span class="subxComment"># copy to *Next-alloc-id</span>
775 <span id="L713" class="LineNr">713 </span> <span class="subxS1Comment"># . reclaim locals</span>
776 <span id="L714" class="LineNr">714 </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> 0x10/imm32 <span class="subxComment"># add to esp</span>
777 <span id="L715" class="LineNr">715 </span> <span class="subxS1Comment"># . epilogue</span>
778 <span id="L716" class="LineNr">716 </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>
779 <span id="L717" class="LineNr">717 </span> 5d/pop-to-ebp
780 <span id="L718" class="LineNr">718 </span> c3/return
781 <span id="L719" class="LineNr">719 </span>
782 <span id="L720" class="LineNr">720 </span><span class="subxFunction">copy-array</span>: <span class="subxComment"># ad: (addr allocation-descriptor), src: (addr array _T), out: (addr handle array _T)</span>
783 <span id="L721" class="LineNr">721 </span> <span class="subxS1Comment"># . prologue</span>
784 <span id="L722" class="LineNr">722 </span> 55/push-ebp
785 <span id="L723" class="LineNr">723 </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>
786 <span id="L724" class="LineNr">724 </span> <span class="subxS1Comment"># . save registers</span>
787 <span id="L725" class="LineNr">725 </span> 50/push-eax
788 <span id="L726" class="LineNr">726 </span> 51/push-ecx
789 <span id="L727" class="LineNr">727 </span> 52/push-edx
790 <span id="L728" class="LineNr">728 </span> 56/push-esi
791 <span id="L729" class="LineNr">729 </span> <span class="subxComment"># esi = src</span>
792 <span id="L730" class="LineNr">730 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 6/r32/esi 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+12) to esi</span>
793 <span id="L731" class="LineNr">731 </span> <span class="subxComment"># var size/ecx: int = src-&gt;size+4</span>
794 <span id="L732" class="LineNr">732 </span> 8b/copy 0/mod/indirect 6/rm32/esi <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 *esi to ecx</span>
795 <span id="L733" class="LineNr">733 </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>
796 <span id="L734" class="LineNr">734 </span> <span class="subxComment"># allocate(ad, size, out)</span>
797 <span id="L735" class="LineNr">735 </span> <span class="subxS2Comment"># . . push args</span>
798 <span id="L736" class="LineNr">736 </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>
799 <span id="L737" class="LineNr">737 </span> 51/push-ecx
800 <span id="L738" class="LineNr">738 </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>
801 <span id="L739" class="LineNr">739 </span> <span class="subxS2Comment"># . . call</span>
802 <span id="L740" class="LineNr">740 </span> e8/call <a href='120allocate.subx.html#L66'>allocate</a>/disp32
803 <span id="L741" class="LineNr">741 </span> <span class="subxS2Comment"># . . discard args</span>
804 <span id="L742" class="LineNr">742 </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>
805 <span id="L743" class="LineNr">743 </span> <span class="subxComment"># var payload/eax: (addr byte) = out-&gt;payload</span>
806 <span id="L744" class="LineNr">744 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax 0x10/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+16) to eax</span>
807 <span id="L745" class="LineNr">745 </span> 8b/copy 1/mod/*+disp8 0/rm32/eax <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+4) to eax</span>
808 <span id="L746" class="LineNr">746 </span> <span class="subxS1Comment"># . skip payload-&gt;allocid</span>
809 <span id="L747" class="LineNr">747 </span> 05/add-to-eax 4/imm32
810 <span id="L748" class="LineNr">748 </span> <span class="subxComment"># var max/ecx: (addr byte) = payload + size</span>
811 <span id="L749" class="LineNr">749 </span> 01/add 3/mod/direct 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># add eax to ecx</span>
812 <span id="L750" class="LineNr">750 </span> <span class="subxComment"># _append-4(payload, max, src, &amp;src-&gt;data[src-&gt;size])</span>
813 <span id="L751" class="LineNr">751 </span> <span class="subxS2Comment"># . . push &amp;src-&gt;data[src-&gt;size]</span>
814 <span id="L752" class="LineNr">752 </span> 8b/copy 0/mod/indirect 6/rm32/esi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 2/r32/edx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy *esi to edx</span>
815 <span id="L753" class="LineNr">753 </span> 8d/copy-address 1/mod/*+disp8 4/rm32/sib 6/base/esi 2/index/edx <span class="Normal"> . </span> 2/r32/edx 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy esi+edx+4 to edx</span>
816 <span id="L754" class="LineNr">754 </span> 52/push-edx
817 <span id="L755" class="LineNr">755 </span> <span class="subxS2Comment"># . . push src</span>
818 <span id="L756" class="LineNr">756 </span> 56/push-esi
819 <span id="L757" class="LineNr">757 </span> <span class="subxS2Comment"># . . push max</span>
820 <span id="L758" class="LineNr">758 </span> 51/push-ecx
821 <span id="L759" class="LineNr">759 </span> <span class="subxS2Comment"># . . push payload</span>
822 <span id="L760" class="LineNr">760 </span> 50/push-eax
823 <span id="L761" class="LineNr">761 </span> <span class="subxS2Comment"># . . call</span>
824 <span id="L762" class="LineNr">762 </span> e8/call <a href='107trace.subx.html#L892'>_append-4</a>/disp32
825 <span id="L763" class="LineNr">763 </span> <span class="subxS2Comment"># . . discard args</span>
826 <span id="L764" class="LineNr">764 </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> 0x10/imm32 <span class="subxComment"># add to esp</span>
827 <span id="L765" class="LineNr">765 </span><span class="Constant">$copy-array:end</span>:
828 <span id="L766" class="LineNr">766 </span> <span class="subxS1Comment"># . restore registers</span>
829 <span id="L767" class="LineNr">767 </span> 5e/pop-to-esi
830 <span id="L768" class="LineNr">768 </span> 5a/pop-to-edx
831 <span id="L769" class="LineNr">769 </span> 59/pop-to-ecx
832 <span id="L770" class="LineNr">770 </span> 58/pop-to-eax
833 <span id="L771" class="LineNr">771 </span> <span class="subxS1Comment"># . epilogue</span>
834 <span id="L772" class="LineNr">772 </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>
835 <span id="L773" class="LineNr">773 </span> 5d/pop-to-ebp
836 <span id="L774" class="LineNr">774 </span> c3/return
837 <span id="L775" class="LineNr">775 </span>
838 <span id="L776" class="LineNr">776 </span><span class="subxTest">test-copy-array</span>:
839 <span id="L777" class="LineNr">777 </span> <span class="subxS1Comment"># . prologue</span>
840 <span id="L778" class="LineNr">778 </span> 55/push-ebp
841 <span id="L779" class="LineNr">779 </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>
842 <span id="L780" class="LineNr">780 </span> <span class="subxComment"># var src/esi: (addr array int) = [3, 4, 5]</span>
843 <span id="L781" class="LineNr">781 </span> 68/push 5/imm32
844 <span id="L782" class="LineNr">782 </span> 68/push 4/imm32
845 <span id="L783" class="LineNr">783 </span> 68/push 3/imm32
846 <span id="L784" class="LineNr">784 </span> 68/push 0xc/imm32/size
847 <span id="L785" class="LineNr">785 </span> 89/copy 3/mod/direct 6/rm32/esi <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 esi</span>
848 <span id="L786" class="LineNr">786 </span> <span class="subxComment"># var ad/ecx: allocation-descriptor</span>
849 <span id="L787" class="LineNr">787 </span> 68/push 0/imm32/limit
850 <span id="L788" class="LineNr">788 </span> 68/push 0/imm32/curr
851 <span id="L789" class="LineNr">789 </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>
852 <span id="L790" class="LineNr">790 </span> <span class="subxComment"># ad = new-segment(512)</span>
853 <span id="L791" class="LineNr">791 </span> <span class="subxS2Comment"># . . push args</span>
854 <span id="L792" class="LineNr">792 </span> 51/push-ecx
855 <span id="L793" class="LineNr">793 </span> 68/push 0x200/imm32
856 <span id="L794" class="LineNr">794 </span> <span class="subxS2Comment"># . . call</span>
857 <span id="L795" class="LineNr">795 </span> e8/call <a href='104new-segment.subx.html#L40'>new-segment</a>/disp32
858 <span id="L796" class="LineNr">796 </span> <span class="subxS2Comment"># . . discard args</span>
859 <span id="L797" class="LineNr">797 </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>
860 <span id="L798" class="LineNr">798 </span> <span class="subxComment"># var expected-payload/ebx = ad-&gt;curr</span>
861 <span id="L799" class="LineNr">799 </span> 8b/copy 0/mod/indirect 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 3/r32/ebx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy *ecx to ebx</span>
862 <span id="L800" class="LineNr">800 </span> <span class="subxComment"># var h/edx: handle = {0, 0}</span>
863 <span id="L801" class="LineNr">801 </span> 68/push 0/imm32
864 <span id="L802" class="LineNr">802 </span> 68/push 0/imm32
865 <span id="L803" class="LineNr">803 </span> 89/copy 3/mod/direct 2/rm32/edx <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 edx</span>
866 <span id="L804" class="LineNr">804 </span> <span class="subxComment"># *Next-alloc-id = 0x34</span>
867 <span id="L805" class="LineNr">805 </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"><a href='120allocate.subx.html#L37'>Next-alloc-id</a></span>/disp32 0x34/imm32 <span class="subxComment"># copy to *Next-alloc-id</span>
868 <span id="L806" class="LineNr">806 </span> <span class="subxComment"># copy-array(ad, src, h)</span>
869 <span id="L807" class="LineNr">807 </span> <span class="subxS2Comment"># . . push args</span>
870 <span id="L808" class="LineNr">808 </span> 52/push-edx
871 <span id="L809" class="LineNr">809 </span> 56/push-esi
872 <span id="L810" class="LineNr">810 </span> 51/push-ecx
873 <span id="L811" class="LineNr">811 </span> <span class="subxS2Comment"># . . call</span>
874 <span id="L812" class="LineNr">812 </span> e8/call <a href='120allocate.subx.html#L720'>copy-array</a>/disp32
875 <span id="L813" class="LineNr">813 </span> <span class="subxS2Comment"># . . discard args</span>
876 <span id="L814" class="LineNr">814 </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>
877 <span id="L815" class="LineNr">815 </span> <span class="subxComment"># check-ints-equal(h-&gt;alloc-id, 0x34, msg)</span>
878 <span id="L816" class="LineNr">816 </span> <span class="subxS2Comment"># . . push args</span>
879 <span id="L817" class="LineNr">817 </span> 68/push <span class="Constant">&quot;F - <a href='120allocate.subx.html#L776'>test-copy-array</a>: sets alloc-id in handle&quot;</span>/imm32
880 <span id="L818" class="LineNr">818 </span> 68/push 0x34/imm32
881 <span id="L819" class="LineNr">819 </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>
882 <span id="L820" class="LineNr">820 </span> <span class="subxS2Comment"># . . call</span>
883 <span id="L821" class="LineNr">821 </span> e8/call <a href='102test.subx.html#L23'>check-ints-equal</a>/disp32
884 <span id="L822" class="LineNr">822 </span> <span class="subxS2Comment"># . . discard args</span>
885 <span id="L823" class="LineNr">823 </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>
886 <span id="L824" class="LineNr">824 </span> <span class="subxComment"># check-ints-equal(h-&gt;payload, expected-payload, msg)</span>
887 <span id="L825" class="LineNr">825 </span> <span class="subxS2Comment"># . . push args</span>
888 <span id="L826" class="LineNr">826 </span> 68/push <span class="Constant">&quot;F - <a href='120allocate.subx.html#L776'>test-copy-array</a>: sets payload in handle&quot;</span>/imm32
889 <span id="L827" class="LineNr">827 </span> 53/push-ebx
890 <span id="L828" class="LineNr">828 </span> ff 6/subop/push 1/mod/*+disp8 2/rm32/edx <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 *(edx+4)</span>
891 <span id="L829" class="LineNr">829 </span> <span class="subxS2Comment"># . . call</span>
892 <span id="L830" class="LineNr">830 </span> e8/call <a href='102test.subx.html#L23'>check-ints-equal</a>/disp32
893 <span id="L831" class="LineNr">831 </span> <span class="subxS2Comment"># . . discard args</span>
894 <span id="L832" class="LineNr">832 </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>
895 <span id="L833" class="LineNr">833 </span> <span class="subxComment"># check-ints-equal(h-&gt;payload-&gt;alloc-id, 0x34, msg)</span>
896 <span id="L834" class="LineNr">834 </span> <span class="subxS2Comment"># . . push args</span>
897 <span id="L835" class="LineNr">835 </span> 68/push <span class="Constant">&quot;F - <a href='120allocate.subx.html#L776'>test-copy-array</a>: sets alloc-id in payload&quot;</span>/imm32
898 <span id="L836" class="LineNr">836 </span> 68/push 0x34/imm32
899 <span id="L837" class="LineNr">837 </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>
900 <span id="L838" class="LineNr">838 </span> <span class="subxS2Comment"># . . call</span>
901 <span id="L839" class="LineNr">839 </span> e8/call <a href='102test.subx.html#L23'>check-ints-equal</a>/disp32
902 <span id="L840" class="LineNr">840 </span> <span class="subxS2Comment"># . . discard args</span>
903 <span id="L841" class="LineNr">841 </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>
904 <span id="L842" class="LineNr">842 </span> <span class="subxComment"># var payload/eax: (addr int) = lookup(h)</span>
905 <span id="L843" class="LineNr">843 </span> <span class="subxS2Comment"># . . push args</span>
906 <span id="L844" class="LineNr">844 </span> ff 6/subop/push 1/mod/*+disp8 2/rm32/edx <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 *(edx+4)</span>
907 <span id="L845" class="LineNr">845 </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>
908 <span id="L846" class="LineNr">846 </span> <span class="subxS2Comment"># . . call</span>
909 <span id="L847" class="LineNr">847 </span> e8/call <a href='120allocate.subx.html#L258'>lookup</a>/disp32
910 <span id="L848" class="LineNr">848 </span> <span class="subxS2Comment"># . . discard args</span>
911 <span id="L849" class="LineNr">849 </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>
912 <span id="L850" class="LineNr">850 </span> <span class="subxComment"># check-ints-equal(payload-&gt;size, 0xc, msg)</span>
913 <span id="L851" class="LineNr">851 </span> <span class="subxS2Comment"># . . push args</span>
914 <span id="L852" class="LineNr">852 </span> 68/push <span class="Constant">&quot;F - <a href='120allocate.subx.html#L776'>test-copy-array</a>: sets array <a href='307size.subx.html#L5'>size</a> in payload&quot;</span>/imm32
915 <span id="L853" class="LineNr">853 </span> 68/push 0xc/imm32
916 <span id="L854" class="LineNr">854 </span> ff 6/subop/push 0/mod/indirect 0/rm32/eax <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 *eax</span>
917 <span id="L855" class="LineNr">855 </span> <span class="subxS2Comment"># . . call</span>
918 <span id="L856" class="LineNr">856 </span> e8/call <a href='102test.subx.html#L23'>check-ints-equal</a>/disp32
919 <span id="L857" class="LineNr">857 </span> <span class="subxS2Comment"># . . discard args</span>
920 <span id="L858" class="LineNr">858 </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>
921 <span id="L859" class="LineNr">859 </span> <span class="subxComment"># check-ints-equal(*Next-alloc-id, 0x35, msg)</span>
922 <span id="L860" class="LineNr">860 </span> <span class="subxS2Comment"># . . push args</span>
923 <span id="L861" class="LineNr">861 </span> 68/push <span class="Constant">&quot;F - <a href='120allocate.subx.html#L776'>test-copy-array</a>: increments Next-alloc-id&quot;</span>/imm32
924 <span id="L862" class="LineNr">862 </span> 68/push 0x35/imm32
925 <span id="L863" class="LineNr">863 </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"><a href='120allocate.subx.html#L37'>Next-alloc-id</a></span>/disp32 <span class="subxComment"># push *Next-alloc-id</span>
926 <span id="L864" class="LineNr">864 </span> <span class="subxS2Comment"># . . call</span>
927 <span id="L865" class="LineNr">865 </span> e8/call <a href='102test.subx.html#L23'>check-ints-equal</a>/disp32
928 <span id="L866" class="LineNr">866 </span> <span class="subxS2Comment"># . . discard args</span>
929 <span id="L867" class="LineNr">867 </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>
930 <span id="L868" class="LineNr">868 </span> <span class="subxComment"># check-ints-equal(ad-&gt;curr - expected-payload, 12 + 4 for alloc-id + 4 for size, msg)</span>
931 <span id="L869" class="LineNr">869 </span> <span class="subxS2Comment"># . . push args</span>
932 <span id="L870" class="LineNr">870 </span> 68/push <span class="Constant">&quot;F - <a href='120allocate.subx.html#L776'>test-copy-array</a>: updates allocation descriptor&quot;</span>/imm32
933 <span id="L871" class="LineNr">871 </span> 68/push 0x14/imm32
934 <span id="L872" class="LineNr">872 </span> 8b/copy 0/mod/indirect 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy *ecx to eax</span>
935 <span id="L873" class="LineNr">873 </span> 29/subtract 3/mod/direct 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 3/r32/ebx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># subtract ebx from eax</span>
936 <span id="L874" class="LineNr">874 </span> 50/push-eax
937 <span id="L875" class="LineNr">875 </span> <span class="subxS2Comment"># . . call</span>
938 <span id="L876" class="LineNr">876 </span> e8/call <a href='102test.subx.html#L23'>check-ints-equal</a>/disp32
939 <span id="L877" class="LineNr">877 </span> <span class="subxS2Comment"># . . discard args</span>
940 <span id="L878" class="LineNr">878 </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>
941 <span id="L879" class="LineNr">879 </span> <span class="subxComment"># clean up</span>
942 <span id="L880" class="LineNr">880 </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"><a href='120allocate.subx.html#L37'>Next-alloc-id</a></span>/disp32 1/imm32 <span class="subxComment"># copy to *Next-alloc-id</span>
943 <span id="L881" class="LineNr">881 </span> <span class="subxS1Comment"># . reclaim locals</span>
944 <span id="L882" class="LineNr">882 </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> 0x20/imm32 <span class="subxComment"># add to esp</span>
945 <span id="L883" class="LineNr">883 </span> <span class="subxS1Comment"># . epilogue</span>
946 <span id="L884" class="LineNr">884 </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>
947 <span id="L885" class="LineNr">885 </span> 5d/pop-to-ebp
948 <span id="L886" class="LineNr">886 </span> c3/return
949 <span id="L887" class="LineNr">887 </span>
950 <span id="L888" class="LineNr">888 </span><span class="subxComment"># Fill a region of memory with zeroes.</span>
951 <span id="L889" class="LineNr">889 </span><span class="subxFunction">zero-out</span>: <span class="subxComment"># start: (addr byte), size: int</span>
952 <span id="L890" class="LineNr">890 </span> <span class="subxComment"># pseudocode:</span>
953 <span id="L891" class="LineNr">891 </span> <span class="subxComment"># curr/esi = start</span>
954 <span id="L892" class="LineNr">892 </span> <span class="subxComment"># i/ecx = 0</span>
955 <span id="L893" class="LineNr">893 </span> <span class="subxComment"># while true</span>
956 <span id="L894" class="LineNr">894 </span> <span class="subxComment"># if (i &gt;= size) break</span>
957 <span id="L895" class="LineNr">895 </span> <span class="subxComment"># *curr = 0</span>
958 <span id="L896" class="LineNr">896 </span> <span class="subxComment"># ++curr</span>
959 <span id="L897" class="LineNr">897 </span> <span class="subxComment"># ++i</span>
960 <span id="L898" class="LineNr">898 </span> <span class="subxComment">#</span>
961 <span id="L899" class="LineNr">899 </span> <span class="subxS1Comment"># . prologue</span>
962 <span id="L900" class="LineNr">900 </span> 55/push-ebp
963 <span id="L901" class="LineNr">901 </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>
964 <span id="L902" class="LineNr">902 </span> <span class="subxS1Comment"># . save registers</span>
965 <span id="L903" class="LineNr">903 </span> 50/push-eax
966 <span id="L904" class="LineNr">904 </span> 51/push-ecx
967 <span id="L905" class="LineNr">905 </span> 52/push-edx
968 <span id="L906" class="LineNr">906 </span> 56/push-esi
969 <span id="L907" class="LineNr">907 </span> <span class="subxComment"># curr/esi = start</span>
970 <span id="L908" class="LineNr">908 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 6/r32/esi 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+8) to esi</span>
971 <span id="L909" class="LineNr">909 </span> <span class="subxComment"># var i/ecx: int = 0</span>
972 <span id="L910" class="LineNr">910 </span> 31/xor 3/mod/direct 1/rm32/ecx <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"># clear ecx</span>
973 <span id="L911" class="LineNr">911 </span> <span class="subxComment"># edx = size</span>
974 <span id="L912" class="LineNr">912 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 2/r32/edx 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+12) to edx</span>
975 <span id="L913" class="LineNr">913 </span><span class="Constant">$zero-out:loop</span>:
976 <span id="L914" class="LineNr">914 </span> <span class="subxComment"># if (i &gt;= size) break</span>
977 <span id="L915" class="LineNr">915 </span> 39/compare 3/mod/direct 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 2/r32/edx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># compare ecx with edx</span>
978 <span id="L916" class="LineNr">916 </span> 7d/jump-if-&gt;= $zero-out:end/disp8
979 <span id="L917" class="LineNr">917 </span> <span class="subxComment"># *curr = 0</span>
980 <span id="L918" class="LineNr">918 </span> c6 0/subop/copy-byte 0/mod/direct 6/rm32/esi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/imm8 <span class="subxComment"># copy byte to *esi</span>
981 <span id="L919" class="LineNr">919 </span> <span class="subxComment"># ++curr</span>
982 <span id="L920" class="LineNr">920 </span> 46/increment-esi
983 <span id="L921" class="LineNr">921 </span> <span class="subxComment"># ++i</span>
984 <span id="L922" class="LineNr">922 </span> 41/increment-ecx
985 <span id="L923" class="LineNr">923 </span> eb/jump $zero-out:<span class="Constant">loop</span>/disp8
986 <span id="L924" class="LineNr">924 </span><span class="Constant">$zero-out:end</span>:
987 <span id="L925" class="LineNr">925 </span> <span class="subxS1Comment"># . restore registers</span>
988 <span id="L926" class="LineNr">926 </span> 5e/pop-to-esi
989 <span id="L927" class="LineNr">927 </span> 5a/pop-to-edx
990 <span id="L928" class="LineNr">928 </span> 59/pop-to-ecx
991 <span id="L929" class="LineNr">929 </span> 58/pop-to-eax
992 <span id="L930" class="LineNr">930 </span> <span class="subxS1Comment"># . epilogue</span>
993 <span id="L931" class="LineNr">931 </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>
994 <span id="L932" class="LineNr">932 </span> 5d/pop-to-ebp
995 <span id="L933" class="LineNr">933 </span> c3/return
996 <span id="L934" class="LineNr">934 </span>
997 <span id="L935" class="LineNr">935 </span><span class="subxTest">test-zero-out</span>:
998 <span id="L936" class="LineNr">936 </span> <span class="subxS1Comment"># . prologue</span>
999 <span id="L937" class="LineNr">937 </span> 55/push-ebp
1000 <span id="L938" class="LineNr">938 </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>
1001 <span id="L939" class="LineNr">939 </span> <span class="subxComment"># region/ecx = 34, 35, 36, 37</span>
1002 <span id="L940" class="LineNr">940 </span> 68/push 0x37363534/imm32
1003 <span id="L941" class="LineNr">941 </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>
1004 <span id="L942" class="LineNr">942 </span> <span class="subxComment"># zero-out(ecx, 3)</span>
1005 <span id="L943" class="LineNr">943 </span> <span class="subxS2Comment"># . . push args</span>
1006 <span id="L944" class="LineNr">944 </span> 68/push 3/imm32/size
1007 <span id="L945" class="LineNr">945 </span> 51/push-ecx
1008 <span id="L946" class="LineNr">946 </span> <span class="subxS2Comment"># . . call</span>
1009 <span id="L947" class="LineNr">947 </span> e8/call <a href='120allocate.subx.html#L889'>zero-out</a>/disp32
1010 <span id="L948" class="LineNr">948 </span> <span class="subxS2Comment"># . . discard args</span>
1011 <span id="L949" class="LineNr">949 </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>
1012 <span id="L950" class="LineNr">950 </span> <span class="subxComment"># first 3 bytes cleared, fourth left alone</span>
1013 <span id="L951" class="LineNr">951 </span> <span class="subxS1Comment"># . check-ints-equal(*ecx, 0x37000000, msg)</span>
1014 <span id="L952" class="LineNr">952 </span> <span class="subxS2Comment"># . . push args</span>
1015 <span id="L953" class="LineNr">953 </span> 68/push <span class="Constant">&quot;F - test-zero-out&quot;</span>/imm32
1016 <span id="L954" class="LineNr">954 </span> 68/push 0x37000000/imm32
1017 <span id="L955" class="LineNr">955 </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>
1018 <span id="L956" class="LineNr">956 </span> <span class="subxS2Comment"># . . call</span>
1019 <span id="L957" class="LineNr">957 </span> e8/call <a href='102test.subx.html#L23'>check-ints-equal</a>/disp32
1020 <span id="L958" class="LineNr">958 </span> <span class="subxS2Comment"># . . discard args</span>
1021 <span id="L959" class="LineNr">959 </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>
1022 <span id="L960" class="LineNr">960 </span> <span class="subxS1Comment"># . reclaim locals</span>
1023 <span id="L961" class="LineNr">961 </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> 4/imm32 <span class="subxComment"># add to esp</span>
1024 <span id="L962" class="LineNr">962 </span> <span class="subxS1Comment"># . epilogue</span>
1025 <span id="L963" class="LineNr">963 </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>
1026 <span id="L964" class="LineNr">964 </span> 5d/pop-to-ebp
1027 <span id="L965" class="LineNr">965 </span> c3/return
1028 <span id="L966" class="LineNr">966 </span>
1029 <span id="L967" class="LineNr">967 </span><span class="subxS2Comment"># . . vim&#0058;nowrap:textwidth=0</span>
1030 </pre>
1031 </body>
1032 </html>
1033 <!-- vim: set foldmethod=manual : -->
Soul of a tiny new machine. Track side effects in safe Assembly → More thorough tests → More malleable and rewrite-friendly software.