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Profanity
Copyright (C) 2012 - 2014 James Booth <boothj5@gmail.com>

Profanity is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

Profanity is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with Profanity.  If not, see <http://www.gnu.org/licenses/>.

There is an additional exception from the author permitting linking
with OpenSSL:

As copyright holder, I give permission for profanity to be linked to
the OpenSSL libraries. This includes permission for profanity
binaries to be distributed linked against the OpenSSL libraries.
All other obligations under the GPL v3 remain intact.
10 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225
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<pre id='vimCodeElement'>
<span id="L1" class="LineNr">  1 </span><span class="Comment">//: The bedrock level 1 of abstraction is now done, and we're going to start</span>
<span id="L2" class="LineNr">  2 </span><span class="Comment">//: building levels above it that make programming in x86 machine code a</span>
<span id="L3" class="LineNr">  3 </span><span class="Comment">//: little more ergonomic.</span>
<span id="L4" class="LineNr">  4 </span><span class="Comment">//:</span>
<span id="L5" class="LineNr">  5 </span><span class="Comment">//: All levels will be &quot;pass through by default&quot;. Whatever they don't</span>
<span id="L6" class="LineNr">  6 </span><span class="Comment">//: understand they will silently pass through to lower levels.</span>
<span id="L7" class="LineNr">  7 </span><span class="Comment">//:</span>
<span id="L8" class="LineNr">  8 </span><span class="Comment">//: Since raw hex bytes of machine code are always possible to inject, SubX is</span>
<span id="L9" class="LineNr">  9 </span><span class="Comment">//: not a language, and we aren't building a compiler. This is something</span>
<span id="L10" class="LineNr"> 10 </span><span class="Comment">//: deliberately leakier. Levels are more for improving auditing, checks and</span>
<span id="L11" class="LineNr"> 11 </span><span class="Comment">//: error messages rather than for hiding low-level details.</span>
<span id="L12" class="LineNr"> 12 </span>
<span id="L13" class="LineNr"> 13 </span><span class="Comment">//: Translator workflow: read 'source' file. Run a series of transforms on it,</span>
<span id="L14" class="LineNr"> 14 </span><span class="Comment">//: each passing through what it doesn't understand. The final program should</span>
<span id="L15" class="LineNr"> 15 </span><span class="Comment">//: be just machine code, suitable to write to an ELF binary.</span>
<span id="L16" class="LineNr"> 16 </span><span class="Comment">//:</span>
<span id="L17" class="LineNr"> 17 </span><span class="Comment">//: Higher levels usually transform code on the basis of metadata.</span>
<span id="L18" class="LineNr"> 18 </span>
<span id="L19" class="LineNr"> 19 </span><span class="Delimiter">:(before &quot;End Main&quot;)</span>
<span id="L20" class="LineNr"> 20 </span><span class="Normal">if</span> <span class="Delimiter">(</span><a href='001help.cc.html#L89'>is_equal</a><span class="Delimiter">(</span>argv[<span class="Constant">1</span>]<span class="Delimiter">,</span> <span class="Constant">&quot;translate&quot;</span><span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L21" class="LineNr"> 21 </span>  <a href='003trace.cc.html#L245'>START_TRACING_UNTIL_END_OF_SCOPE</a><span class="Delimiter">;</span>
<span id="L22" class="LineNr"> 22 </span>  assert<span class="Delimiter">(</span>argc &gt; <span class="Constant">3</span><span class="Delimiter">);</span>
<span id="L23" class="LineNr"> 23 </span>  <a href='000organization.cc.html#L148'>reset</a><span class="Delimiter">();</span>
<span id="L24" class="LineNr"> 24 </span>  <a href='011run.cc.html#L99'>program</a> p<span class="Delimiter">;</span>
<span id="L25" class="LineNr"> 25 </span>  ifstream fin<span class="Delimiter">(</span>argv[<span class="Constant">2</span>]<span class="Delimiter">);</span>
<span id="L26" class="LineNr"> 26 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!fin<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L27" class="LineNr"> 27 </span>    cerr &lt;&lt; <span class="Constant">&quot;could not open &quot;</span> &lt;&lt; argv[<span class="Constant">2</span>] &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
<span id="L28" class="LineNr"> 28 </span>    <span class="Identifier">return</span> <span class="Constant">1</span><span class="Delimiter">;</span>
<span id="L29" class="LineNr"> 29 </span>  <span class="Delimiter">}</span>
<span id="L30" class="LineNr"> 30 </span>  <a href='011run.cc.html#L132'>parse</a><span class="Delimiter">(</span>fin<span class="Delimiter">,</span> p<span class="Delimiter">);</span>
<span id="L31" class="LineNr"> 31 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span><a href='003trace.cc.html#L217'>trace_contains_errors</a><span class="Delimiter">())</span> <span class="Identifier">return</span> <span class="Constant">1</span><span class="Delimiter">;</span>
<span id="L32" class="LineNr"> 32 </span>  <a href='011run.cc.html#L196'>transform</a><span class="Delimiter">(</span>p<span class="Delimiter">);</span>
<span id="L33" class="LineNr"> 33 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span><a href='003trace.cc.html#L217'>trace_contains_errors</a><span class="Delimiter">())</span> <span class="Identifier">return</span> <span class="Constant">1</span><span class="Delimiter">;</span>
<span id="L34" class="LineNr"> 34 </span>  <a href='028translate.cc.html#L41'>save_elf</a><span class="Delimiter">(</span>p<span class="Delimiter">,</span> argv[<span class="Constant">3</span>]<span class="Delimiter">);</span>
<span id="L35" class="LineNr"> 35 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span><a href='003trace.cc.html#L217'>trace_contains_errors</a><span class="Delimiter">())</span> unlink<span class="Delimiter">(</span>argv[<span class="Constant">3</span>]<span class="Delimiter">);</span>
<span id="L36" class="LineNr"> 36 </span>  <span class="Identifier">return</span> <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L37" class="LineNr"> 37 </span><span class="Delimiter">}</span>
<span id="L38" class="LineNr"> 38 </span>
<span id="L39" class="LineNr"> 39 </span><span class="Delimiter">:(code)</span>
<span id="L40" class="LineNr"> 40 </span><span class="Comment">// write out a program to a bare-bones ELF file</span>
<span id="L41" class="LineNr"> 41 </span><span class="Normal">void</span> <a href='028translate.cc.html#L41'>save_elf</a><span class="Delimiter">(</span><span class="Normal">const</span> program&amp; p<span class="Delimiter">,</span> <span class="Normal">const</span> <span class="Normal">char</span>* filename<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L42" class="LineNr"> 42 </span>  ofstream out<span class="Delimiter">(</span>filename<span class="Delimiter">,</span> ios::binary<span class="Delimiter">);</span>
<span id="L43" class="LineNr"> 43 </span>  <a href='028translate.cc.html#L49'>write_elf_header</a><span class="Delimiter">(</span>out<span class="Delimiter">,</span> p<span class="Delimiter">);</span>
<span id="L44" class="LineNr"> 44 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">size_t</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; p<span class="Delimiter">.</span><a href='011run.cc.html#L100'>segments</a><span class="Delimiter">.</span>size<span class="Delimiter">();</span>  ++i<span class="Delimiter">)</span>
<span id="L45" class="LineNr"> 45 </span>    <a href='028translate.cc.html#L143'>write_segment</a><span class="Delimiter">(</span>p<span class="Delimiter">.</span><a href='011run.cc.html#L100'>segments</a><span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> out<span class="Delimiter">);</span>
<span id="L46" class="LineNr"> 46 </span>  out<span class="Delimiter">.</span>close<span class="Delimiter">();</span>
<span id="L47" class="LineNr"> 47 </span><span class="Delimiter">}</span>
<span id="L48" class="LineNr"> 48 </span>
<span id="L49" class="LineNr"> 49 </span><span class="Normal">void</span> <a href='028translate.cc.html#L49'>write_elf_header</a><span class="Delimiter">(</span>ostream&amp; out<span class="Delimiter">,</span> <span class="Normal">const</span> program&amp; p<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L50" class="LineNr"> 50 </span>  <span class="Normal">char</span> c = <span class="cSpecial">'\0'</span><span class="Delimiter">;</span>
<span id="L51" class="LineNr"> 51 </span><span class="Comment">#define O(X)  c = (X); out.write(&amp;c, sizeof(c))</span>
<span id="L52" class="LineNr"> 52 </span><span class="Comment">// host is required to be little-endian</span>
<span id="L53" class="LineNr"> 53 </span><span class="Comment">#define emit(X)  out.write(reinterpret_cast&lt;const char*&gt;(&amp;X), sizeof(X))</span>
<span id="L54" class="LineNr"> 54 </span>  <span class="SalientComment">//// ehdr</span>
<span id="L55" class="LineNr"> 55 </span>  <span class="Comment">// e_ident</span>
<span id="L56" class="LineNr"> 56 </span>  O<span class="Delimiter">(</span><span class="Constant">0x7f</span><span class="Delimiter">);</span> O<span class="Delimiter">(</span><span class="Comment">/*</span><span class="Comment">E</span><span class="Comment">*/</span><span class="Constant">0x45</span><span class="Delimiter">);</span> O<span class="Delimiter">(</span><span class="Comment">/*</span><span class="Comment">L</span><span class="Comment">*/</span><span class="Constant">0x4c</span><span class="Delimiter">);</span> O<span class="Delimiter">(</span><span class="Comment">/*</span><span class="Comment">F</span><span class="Comment">*/</span><span class="Constant">0x46</span><span class="Delimiter">);</span>
<span id="L57" class="LineNr"> 57 </span>    O<span class="Delimiter">(</span><span class="Constant">0x1</span><span class="Delimiter">);</span>  <span class="Comment">// 32-bit format</span>
<span id="L58" class="LineNr"> 58 </span>    O<span class="Delimiter">(</span><span class="Constant">0x1</span><span class="Delimiter">);</span>  <span class="Comment">// little-endian</span>
<span id="L59" class="LineNr"> 59 </span>    O<span class="Delimiter">(</span><span class="Constant">0x1</span><span class="Delimiter">);</span> O<span class="Delimiter">(</span><span class="Constant">0x0</span><span class="Delimiter">);</span>
<span id="L60" class="LineNr"> 60 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">size_t</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; <span class="Constant">8</span><span class="Delimiter">;</span>  ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span> O<span class="Delimiter">(</span><span class="Constant">0x0</span><span class="Delimiter">);</span> <span class="Delimiter">}</span>
<span id="L61" class="LineNr"> 61 </span>  <span class="Comment">// e_type</span>
<span id="L62" class="LineNr"> 62 </span>  O<span class="Delimiter">(</span><span class="Constant">0x02</span><span class="Delimiter">);</span> O<span class="Delimiter">(</span><span class="Constant">0x00</span><span class="Delimiter">);</span>
<span id="L63" class="LineNr"> 63 </span>  <span class="Comment">// e_machine</span>
<span id="L64" class="LineNr"> 64 </span>  O<span class="Delimiter">(</span><span class="Constant">0x03</span><span class="Delimiter">);</span> O<span class="Delimiter">(</span><span class="Constant">0x00</span><span class="Delimiter">);</span>
<span id="L65" class="LineNr"> 65 </span>  <span class="Comment">// e_version</span>
<span id="L66" class="LineNr"> 66 </span>  O<span class="Delimiter">(</span><span class="Constant">0x01</span><span class="Delimiter">);</span> O<span class="Delimiter">(</span><span class="Constant">0x00</span><span class="Delimiter">);</span> O<span class="Delimiter">(</span><span class="Constant">0x00</span><span class="Delimiter">);</span> O<span class="Delimiter">(</span><span class="Constant">0x00</span><span class="Delimiter">);</span>
<span id="L67" class="LineNr"> 67 </span>  <span class="Comment">// e_entry</span>
<span id="L68" class="LineNr"> 68 </span>  <span class="Normal">int</span> e_entry = p<span class="Delimiter">.</span><a href='011run.cc.html#L100'>segments</a><span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span><a href='011run.cc.html#L108'>start</a><span class="Delimiter">;</span>  <span class="Comment">// convention</span>
<span id="L69" class="LineNr"> 69 </span>  emit<span class="Delimiter">(</span>e_entry<span class="Delimiter">);</span>
<span id="L70" class="LineNr"> 70 </span>  <span class="Comment">// e_phoff -- immediately after ELF header</span>
<span id="L71" class="LineNr"> 71 </span>  <span class="Normal">int</span> e_phoff = <span class="Constant">0x34</span><span class="Delimiter">;</span>
<span id="L72" class="LineNr"> 72 </span>  emit<span class="Delimiter">(</span>e_phoff<span class="Delimiter">);</span>
<span id="L73" class="LineNr"> 73 </span>  <span class="Comment">// e_shoff; unused</span>
<span id="L74" class="LineNr"> 74 </span>  <span class="Normal">int</span> dummy32 = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L75" class="LineNr"> 75 </span>  emit<span class="Delimiter">(</span>dummy32<span class="Delimiter">);</span>
<span id="L76" class="LineNr"> 76 </span>  <span class="Comment">// e_flags; unused</span>
<span id="L77" class="LineNr"> 77 </span>  emit<span class="Delimiter">(</span>dummy32<span class="Delimiter">);</span>
<span id="L78" class="LineNr"> 78 </span>  <span class="Comment">// e_ehsize</span>
<span id="L79" class="LineNr"> 79 </span>  <span class="Normal">uint16_t</span> e_ehsize = <span class="Constant">0x34</span><span class="Delimiter">;</span>
<span id="L80" class="LineNr"> 80 </span>  emit<span class="Delimiter">(</span>e_ehsize<span class="Delimiter">);</span>
<span id="L81" class="LineNr"> 81 </span>  <span class="Comment">// e_phentsize</span>
<span id="L82" class="LineNr"> 82 </span>  <span class="Normal">uint16_t</span> e_phentsize = <span class="Constant">0x20</span><span class="Delimiter">;</span>
<span id="L83" class="LineNr"> 83 </span>  emit<span class="Delimiter">(</span>e_phentsize<span class="Delimiter">);</span>
<span id="L84" class="LineNr"> 84 </span>  <span class="Comment">// e_phnum</span>
<span id="L85" class="LineNr"> 85 </span>  <span class="Normal">uint16_t</span> e_phnum = <a href='001help.cc.html#L157'>SIZE</a><span class="Delimiter">(</span>p<span class="Delimiter">.</span><a href='011run.cc.html#L100'>segments</a><span class="Delimiter">);</span>
<span id="L86" class="LineNr"> 86 </span>  emit<span class="Delimiter">(</span>e_phnum<span class="Delimiter">);</span>
<span id="L87" class="LineNr"> 87 </span>  <span class="Comment">// e_shentsize</span>
<span id="L88" class="LineNr"> 88 </span>  <span class="Normal">uint16_t</span> dummy16 = <span class="Constant">0x0</span><span class="Delimiter">;</span>
<span id="L89" class="LineNr"> 89 </span>  emit<span class="Delimiter">(</span>dummy16<span class="Delimiter">);</span>
<span id="L90" class="LineNr"> 90 </span>  <span class="Comment">// e_shnum</span>
<span id="L91" class="LineNr"> 91 </span>  emit<span class="Delimiter">(</span>dummy16<span class="Delimiter">);</span>
<span id="L92" class="LineNr"> 92 </span>  <span class="Comment">// e_shstrndx</span>
<span id="L93" class="LineNr"> 93 </span>  emit<span class="Delimiter">(</span>dummy16<span class="Delimiter">);</span>
<span id="L94" class="LineNr"> 94 </span>
<span id="L95" class="LineNr"> 95 </span>  <span class="Normal">uint32_t</span> p_offset = <span class="Comment">/*</span><span class="Comment">size of ehdr</span><span class="Comment">*/</span><span class="Constant">0x34</span> + <a href='001help.cc.html#L157'>SIZE</a><span class="Delimiter">(</span>p<span class="Delimiter">.</span><a href='011run.cc.html#L100'>segments</a><span class="Delimiter">)</span>*<span class="Constant">0x20</span><span class="Comment">/*</span><span class="Comment">size of each phdr</span><span class="Comment">*/</span><span class="Delimiter">;</span>
<span id="L96" class="LineNr"> 96 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; <a href='001help.cc.html#L157'>SIZE</a><span class="Delimiter">(</span>p<span class="Delimiter">.</span><a href='011run.cc.html#L100'>segments</a><span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L97" class="LineNr"> 97 </span>    <span class="SalientComment">//// phdr</span>
<span id="L98" class="LineNr"> 98 </span>    <span class="Comment">// p_type</span>
<span id="L99" class="LineNr"> 99 </span>    <span class="Normal">uint32_t</span> p_type = <span class="Constant">0x1</span><span class="Delimiter">;</span>
<span id="L100" class="LineNr">100 </span>    emit<span class="Delimiter">(</span>p_type<span class="Delimiter">);</span>
<span id="L101" class="LineNr">101 </span>    <span class="Comment">// p_offset</span>
<span id="L102" class="LineNr">102 </span>    emit<span class="Delimiter">(</span>p_offset<span class="Delimiter">);</span>
<span id="L103" class="LineNr">103 </span>    <span class="Comment">// p_vaddr</span>
<span id="L104" class="LineNr">104 </span>    <span class="Normal">uint32_t</span> p_start = p<span class="Delimiter">.</span><a href='011run.cc.html#L100'>segments</a><span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span><a href='011run.cc.html#L108'>start</a><span class="Delimiter">;</span>
<span id="L105" class="LineNr">105 </span>    emit<span class="Delimiter">(</span>p_start<span class="Delimiter">);</span>
<span id="L106" class="LineNr">106 </span>    <span class="Comment">// p_paddr</span>
<span id="L107" class="LineNr">107 </span>    emit<span class="Delimiter">(</span>p_start<span class="Delimiter">);</span>
<span id="L108" class="LineNr">108 </span>    <span class="Comment">// p_filesz</span>
<span id="L109" class="LineNr">109 </span>    <span class="Normal">uint32_t</span> size = <a href='028translate.cc.html#L153'>num_words</a><span class="Delimiter">(</span>p<span class="Delimiter">.</span><a href='011run.cc.html#L100'>segments</a><span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">));</span>
<span id="L110" class="LineNr">110 </span>    assert<span class="Delimiter">(</span>p_offset + size &lt; <a href='012elf.cc.html#L127'>SEGMENT_SIZE</a><span class="Delimiter">);</span>
<span id="L111" class="LineNr">111 </span>    emit<span class="Delimiter">(</span>size<span class="Delimiter">);</span>
<span id="L112" class="LineNr">112 </span>    <span class="Comment">// p_memsz</span>
<span id="L113" class="LineNr">113 </span>    emit<span class="Delimiter">(</span>size<span class="Delimiter">);</span>
<span id="L114" class="LineNr">114 </span>    <span class="Comment">// p_flags</span>
<span id="L115" class="LineNr">115 </span>    <span class="Normal">uint32_t</span> p_flags = <span class="Delimiter">(</span>i == <span class="Constant">0</span><span class="Delimiter">)</span> ? <span class="Comment">/*</span><span class="Comment">r-x</span><span class="Comment">*/</span><span class="Constant">0x5</span> : <span class="Comment">/*</span><span class="Comment">rw-</span><span class="Comment">*/</span><span class="Constant">0x6</span><span class="Delimiter">;</span>  <span class="Comment">// convention: only first segment is code</span>
<span id="L116" class="LineNr">116 </span>    emit<span class="Delimiter">(</span>p_flags<span class="Delimiter">);</span>
<span id="L117" class="LineNr">117 </span>
<span id="L118" class="LineNr">118 </span>    <span class="Comment">// p_align</span>
<span id="L119" class="LineNr">119 </span>    <span class="Comment">// &quot;As the system creates or augments a process image, it logically copies</span>
<span id="L120" class="LineNr">120 </span>    <span class="Comment">// a file's segment to a virtual memory segment.  When—and if— the system</span>
<span id="L121" class="LineNr">121 </span>    <span class="Comment">// physically reads the file depends on the program's execution behavior,</span>
<span id="L122" class="LineNr">122 </span>    <span class="Comment">// system load, and so on.  A process does not require a physical page</span>
<span id="L123" class="LineNr">123 </span>    <span class="Comment">// unless it references the logical page during execution, and processes</span>
<span id="L124" class="LineNr">124 </span>    <span class="Comment">// commonly leave many pages unreferenced. Therefore delaying physical</span>
<span id="L125" class="LineNr">125 </span>    <span class="Comment">// reads frequently obviates them, improving system performance. To obtain</span>
<span id="L126" class="LineNr">126 </span>    <span class="Comment">// this efficiency in practice, executable and shared object files must</span>
<span id="L127" class="LineNr">127 </span>    <span class="Comment">// have segment images whose file offsets and virtual addresses are</span>
<span id="L128" class="LineNr">128 </span>    <span class="Comment">// congruent, modulo the page size.&quot; -- <a href="http://refspecs.linuxbase.org/elf/elf.pdf">http://refspecs.linuxbase.org/elf/elf.pdf</a> (page 95)</span>
<span id="L129" class="LineNr">129 </span>    <span class="Normal">uint32_t</span> p_align = <span class="Constant">0x1000</span><span class="Delimiter">;</span>  <span class="Comment">// default page size on linux</span>
<span id="L130" class="LineNr">130 </span>    emit<span class="Delimiter">(</span>p_align<span class="Delimiter">);</span>
<span id="L131" class="LineNr">131 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>p_offset % p_align != p_start % p_align<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L132" class="LineNr">132 </span>      <a href='003trace.cc.html#L203'>raise</a> &lt;&lt; <span class="Constant">&quot;segment starting at 0x&quot;</span> &lt;&lt; <a href='010---vm.cc.html#L260'>HEXWORD</a> &lt;&lt; p_start &lt;&lt; <span class="Constant">&quot; is improperly aligned; alignment for p_offset &quot;</span> &lt;&lt; p_offset &lt;&lt; <span class="Constant">&quot; should be &quot;</span> &lt;&lt; <span class="Delimiter">(</span>p_offset % p_align<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot; but is &quot;</span> &lt;&lt; <span class="Delimiter">(</span>p_start % p_align<span class="Delimiter">)</span> &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span>
<span id="L133" class="LineNr">133 </span>      <span class="Identifier">return</span><span class="Delimiter">;</span>
<span id="L134" class="LineNr">134 </span>    <span class="Delimiter">}</span>
<span id="L135" class="LineNr">135 </span>
<span id="L136" class="LineNr">136 </span>    <span class="Comment">// prepare for next segment</span>
<span id="L137" class="LineNr">137 </span>    p_offset += size<span class="Delimiter">;</span>
<span id="L138" class="LineNr">138 </span>  <span class="Delimiter">}</span>
<span id="L139" class="LineNr">139 </span><span class="Comment">#undef O</span>
<span id="L140" class="LineNr">140 </span><span class="Comment">#undef emit</span>
<span id="L141" class="LineNr">141 </span><span class="Delimiter">}</span>
<span id="L142" class="LineNr">142 </span>
<span id="L143" class="LineNr">143 </span><span class="Normal">void</span> <a href='028translate.cc.html#L143'>write_segment</a><span class="Delimiter">(</span><span class="Normal">const</span> segment&amp; s<span class="Delimiter">,</span> ostream&amp; out<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L144" class="LineNr">144 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; <a href='001help.cc.html#L157'>SIZE</a><span class="Delimiter">(</span>s<span class="Delimiter">.</span><a href='011run.cc.html#L109'>lines</a><span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L145" class="LineNr">145 </span>    <span class="Normal">const</span> vector&lt;word&gt;&amp; w = s<span class="Delimiter">.</span><a href='011run.cc.html#L109'>lines</a><span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span><a href='011run.cc.html#L118'>words</a><span class="Delimiter">;</span>
<span id="L146" class="LineNr">146 </span>    <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> j = <span class="Constant">0</span><span class="Delimiter">;</span>  j &lt; <a href='001help.cc.html#L157'>SIZE</a><span class="Delimiter">(</span>w<span class="Delimiter">);</span>  ++j<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L147" class="LineNr">147 </span>      <span class="Normal">uint8_t</span> x = <a href='011run.cc.html#L232'>hex_byte</a><span class="Delimiter">(</span>w<span class="Delimiter">.</span>at<span class="Delimiter">(</span>j<span class="Delimiter">).</span><a href='011run.cc.html#L125'>data</a><span class="Delimiter">);</span>  <span class="Comment">// we're done with metadata by this point</span>
<span id="L148" class="LineNr">148 </span>      out<span class="Delimiter">.</span>write<span class="Delimiter">(</span><span class="Normal">reinterpret_cast</span>&lt;<span class="Normal">const</span> <span class="Normal">char</span>*&gt;<span class="Delimiter">(</span>&amp;x<span class="Delimiter">),</span> <span class="Comment">/*</span><span class="Comment">sizeof(byte)</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">);</span>
<span id="L149" class="LineNr">149 </span>    <span class="Delimiter">}</span>
<span id="L150" class="LineNr">150 </span>  <span class="Delimiter">}</span>
<span id="L151" class="LineNr">151 </span><span class="Delimiter">}</span>
<span id="L152" class="LineNr">152 </span>
<span id="L153" class="LineNr">153 </span><span class="Normal">uint32_t</span> <a href='028translate.cc.html#L153'>num_words</a><span class="Delimiter">(</span><span class="Normal">const</span> segment&amp; s<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L154" class="LineNr">154 </span>  <span class="Normal">uint32_t</span> sum = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L155" class="LineNr">155 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; <a href='001help.cc.html#L157'>SIZE</a><span class="Delimiter">(</span>s<span class="Delimiter">.</span><a href='011run.cc.html#L109'>lines</a><span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span>
<span id="L156" class="LineNr">156 </span>    sum += <a href='001help.cc.html#L157'>SIZE</a><span class="Delimiter">(</span>s<span class="Delimiter">.</span><a href='011run.cc.html#L109'>lines</a><span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span><a href='011run.cc.html#L118'>words</a><span class="Delimiter">);</span>
<span id="L157" class="LineNr">157 </span>  <span class="Identifier">return</span> sum<span class="Delimiter">;</span>
<span id="L158" class="LineNr">158 </span><span class="Delimiter">}</span>
<span id="L159" class="LineNr">159 </span>
<span id="L160" class="LineNr">160 </span><span class="Delimiter">:(before &quot;End Includes&quot;)</span>
<span id="L161" class="LineNr">161 </span><span class="Normal">using</span> std::ios<span class="Delimiter">;</span>
</pre>
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