4199

author: Kartik K. Agaram <vc@akkartik.com> 2018-01-25 22:39:31 -0800
committer: Kartik K. Agaram <vc@akkartik.com> 2018-01-25 22:39:31 -0800
commit: 805d58c6aeeeba3e4989c0eed6781b3861e8fae0 (patch)
tree: ea5225bdd7c5fbeea912671cdc5f1c4b2b2828d7 /html/subx/020elf.cc.html
parent: aefa8fec6a473be459a2ff33e6bd96e7c22ced20 (diff)
download: mu-805d58c6aeeeba3e4989c0eed6781b3861e8fae0.tar.gz
1 files changed, 138 insertions, 0 deletions
diff --git a/html/subx/020elf.cc.html b/html/subx/020elf.cc.html
new file mode 100644
index 00000000..ef3dea8b
--- /dev/null
+++ b/html/subx/020elf.cc.html
@@ -0,0 +1,138 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
+<html>
+<head>
+<meta http-equiv="content-type" content="text/html; charset=UTF-8">
+<title>Mu - subx/020elf.cc</title>
+<meta name="Generator" content="Vim/8.0">
+<meta name="plugin-version" content="vim7.4_v2">
+<meta name="syntax" content="cpp">
+<meta name="settings" content="number_lines,use_css,pre_wrap,no_foldcolumn,expand_tabs,line_ids,prevent_copy=">
+<meta name="colorscheme" content="minimal">
+<style type="text/css">
+<!--
+pre { white-space: pre-wrap; font-family: monospace; color: #aaaaaa; background-color: #080808; }
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+a { color:#eeeeee; text-decoration: none; }
+a:hover { text-decoration: underline; }
+* { font-size: 12pt; font-size: 1em; }
+.Todo { color: #000000; background-color: #ffff00; padding-bottom: 1px; }
+.PreProc { color: #800080; }
+.LineNr { color: #444444; }
+.Constant { color: #00a0a0; }
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+.Identifier { color: #c0a020; }
+.Normal { color: #aaaaaa; background-color: #080808; padding-bottom: 1px; }
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+.Comment a { color:#0000ee; text-decoration:underline; }
+.cSpecial { color: #008000; }
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+  /* Always jump to new location even if the line was hidden inside a fold, or
+   * we corrected the raw number to a line ID.
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+  }
+  return true;
+}
+if ('onhashchange' in window) {
+  window.onhashchange = JumpToLine;
+}
+
+-->
+</script>
+</head>
+<body onload='JumpToLine();'>
+<pre id='vimCodeElement'>
+<span id="L1" class="LineNr"> 1 </span><span class="Comment">// <a href="https://github.com/kragen/stoneknifeforth/blob/702d2ebe1b/386.c">https://github.com/kragen/stoneknifeforth/blob/702d2ebe1b/386.c</a></span>
+<span id="L2" class="LineNr"> 2 </span>
+<span id="L3" class="LineNr"> 3 </span><span class="Delimiter">:(before &quot;End Main&quot;)</span>
+<span id="L4" class="LineNr"> 4 </span>assert<span class="Delimiter">(</span>argc &gt; <span class="Constant">1</span><span class="Delimiter">);</span>
+<span id="L5" class="LineNr"> 5 </span><a href='000organization.cc.html#L139'>reset</a><span class="Delimiter">();</span>
+<span id="L6" class="LineNr"> 6 </span><a href='020elf.cc.html#L11'>load_elf</a><span class="Delimiter">(</span>argv[<span class="Constant">1</span>]<span class="Delimiter">);</span>
+<span id="L7" class="LineNr"> 7 </span><span class="Normal">while</span> <span class="Delimiter">(</span><a href='010core.cc.html#L23'>EIP</a> &lt; <a href='010core.cc.html#L68'>End_of_program</a><span class="Delimiter">)</span>
+<span id="L8" class="LineNr"> 8 </span>  <a href='010core.cc.html#L109'>run_one_instruction</a><span class="Delimiter">();</span>
+<span id="L9" class="LineNr"> 9 </span>
+<span id="L10" class="LineNr">10 </span><span class="Delimiter">:(code)</span>
+<span id="L11" class="LineNr">11 </span><span class="Normal">void</span> <a href='020elf.cc.html#L11'>load_elf</a><span class="Delimiter">(</span><span class="Normal">const</span> string&amp; filename<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<span id="L12" class="LineNr">12 </span>  <span class="Normal">int</span> fd = open<span class="Delimiter">(</span>filename<span class="Delimiter">.</span>c_str<span class="Delimiter">(),</span> O_RDONLY<span class="Delimiter">);</span>
+<span id="L13" class="LineNr">13 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>fd &lt; <span class="Constant">0</span><span class="Delimiter">)</span> <a href='020elf.cc.html#L55'>die</a><span class="Delimiter">(</span><span class="Constant">&quot;</span><span class="cSpecial">%s</span><span class="Constant">: open&quot;</span><span class="Delimiter">,</span> filename<span class="Delimiter">.</span>c_str<span class="Delimiter">());</span>
+<span id="L14" class="LineNr">14 </span>  <span class="Normal">off_t</span> size = lseek<span class="Delimiter">(</span>fd<span class="Delimiter">,</span> <span class="Constant">0</span><span class="Delimiter">,</span> <span class="Constant">SEEK_END</span><span class="Delimiter">);</span>
+<span id="L15" class="LineNr">15 </span>  lseek<span class="Delimiter">(</span>fd<span class="Delimiter">,</span> <span class="Constant">0</span><span class="Delimiter">,</span> <span class="Constant">SEEK_SET</span><span class="Delimiter">);</span>
+<span id="L16" class="LineNr">16 </span>  <span class="Normal">uint8_t</span>* elf_contents = <span class="Normal">static_cast</span>&lt;<span class="Normal">uint8_t</span>*&gt;<span class="Delimiter">(</span>malloc<span class="Delimiter">(</span>size<span class="Delimiter">));</span>
+<span id="L17" class="LineNr">17 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>elf_contents == <span class="Constant">NULL</span><span class="Delimiter">)</span> <a href='020elf.cc.html#L55'>die</a><span class="Delimiter">(</span><span class="Constant">&quot;malloc(</span><span class="cSpecial">%d</span><span class="Constant">)&quot;</span><span class="Delimiter">,</span> size<span class="Delimiter">);</span>
+<span id="L18" class="LineNr">18 </span>  <span class="Normal">ssize_t</span> read_size = read<span class="Delimiter">(</span>fd<span class="Delimiter">,</span> elf_contents<span class="Delimiter">,</span> size<span class="Delimiter">);</span>
+<span id="L19" class="LineNr">19 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>size != read_size<span class="Delimiter">)</span> <a href='020elf.cc.html#L55'>die</a><span class="Delimiter">(</span><span class="Constant">&quot;read → </span><span class="cSpecial">%d</span><span class="Constant"> (!= </span><span class="cSpecial">%d</span><span class="Constant">)&quot;</span><span class="Delimiter">,</span> size<span class="Delimiter">,</span> read_size<span class="Delimiter">);</span>
+<span id="L20" class="LineNr">20 </span>  <a href='020elf.cc.html#L24'>load_elf_contents</a><span class="Delimiter">(</span>elf_contents<span class="Delimiter">,</span> size<span class="Delimiter">);</span>
+<span id="L21" class="LineNr">21 </span>  free<span class="Delimiter">(</span>elf_contents<span class="Delimiter">);</span>
+<span id="L22" class="LineNr">22 </span><span class="Delimiter">}</span>
+<span id="L23" class="LineNr">23 </span>
+<span id="L24" class="LineNr">24 </span><span class="Normal">void</span> <a href='020elf.cc.html#L24'>load_elf_contents</a><span class="Delimiter">(</span><span class="Normal">uint8_t</span>* elf_contents<span class="Delimiter">,</span> <span class="Normal">size_t</span> length<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<span id="L25" class="LineNr">25 </span>  <span class="Normal">uint8_t</span> magic[<span class="Constant">5</span>] = <span class="Delimiter">{</span><span class="Constant">0</span><span class="Delimiter">};</span>
+<span id="L26" class="LineNr">26 </span>  memcpy<span class="Delimiter">(</span>magic<span class="Delimiter">,</span> elf_contents<span class="Delimiter">,</span> <span class="Constant">4</span><span class="Delimiter">);</span>
+<span id="L27" class="LineNr">27 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span><span class="Constant">0</span> != memcmp<span class="Delimiter">(</span>magic<span class="Delimiter">,</span> <span class="Constant">&quot;</span><span class="cSpecial">\177</span><span class="Constant">ELF&quot;</span><span class="Delimiter">,</span> <span class="Constant">4</span><span class="Delimiter">))</span>
+<span id="L28" class="LineNr">28 </span>    <a href='020elf.cc.html#L55'>die</a><span class="Delimiter">(</span><span class="Constant">&quot;Invalid ELF file starting with </span><span class="cSpecial">\&quot;</span><span class="cSpecial">%s</span><span class="cSpecial">\&quot;</span><span class="Constant">&quot;</span><span class="Delimiter">,</span> magic<span class="Delimiter">);</span>
+<span id="L29" class="LineNr">29 </span>
+<span id="L30" class="LineNr">30 </span>  <span class="Normal">uint32_t</span> e_type = <a href='020elf.cc.html#L51'>u32_in</a><span class="Delimiter">(</span>&amp;elf_contents[<span class="Constant">16</span>]<span class="Delimiter">);</span>
+<span id="L31" class="LineNr">31 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span><span class="Constant">0x00030002</span> != e_type<span class="Delimiter">)</span>
+<span id="L32" class="LineNr">32 </span>    <a href='020elf.cc.html#L55'>die</a><span class="Delimiter">(</span><span class="Constant">&quot;ELF type/machine 0x</span><span class="cSpecial">%x</span><span class="Constant"> isn't i386 executable&quot;</span><span class="Delimiter">,</span> e_type<span class="Delimiter">);</span>
+<span id="L33" class="LineNr">33 </span>
+<span id="L34" class="LineNr">34 </span>  <span class="Normal">uint32_t</span> e_entry = <a href='020elf.cc.html#L51'>u32_in</a><span class="Delimiter">(</span>&amp;elf_contents[<span class="Constant">24</span>]<span class="Delimiter">);</span>
+<span id="L35" class="LineNr">35 </span>  <span class="Normal">uint32_t</span> e_phoff = <a href='020elf.cc.html#L51'>u32_in</a><span class="Delimiter">(</span>&amp;elf_contents[<span class="Constant">28</span>]<span class="Delimiter">);</span>
+<span id="L36" class="LineNr">36 </span>  <span class="Normal">uint32_t</span> p_vaddr = <a href='020elf.cc.html#L51'>u32_in</a><span class="Delimiter">(</span>&amp;elf_contents[e_phoff + <span class="Constant">8</span>]<span class="Delimiter">);</span>
+<span id="L37" class="LineNr">37 </span>  <span class="Normal">uint32_t</span> p_memsz = <a href='020elf.cc.html#L51'>u32_in</a><span class="Delimiter">(</span>&amp;elf_contents[e_phoff + <span class="Constant">20</span>]<span class="Delimiter">);</span>
+<span id="L38" class="LineNr">38 </span>
+<span id="L39" class="LineNr">39 </span>  <a href='010core.cc.html#L67'>Mem</a><span class="Delimiter">.</span>resize<span class="Delimiter">(</span>p_memsz<span class="Delimiter">);</span>  <span class="Comment">// </span><span class="Todo">TODO</span><span class="Comment">: not sure if this should be + p_vaddr</span>
+<span id="L40" class="LineNr">40 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>length &gt; p_memsz - p_vaddr<span class="Delimiter">)</span> length = p_memsz - p_vaddr<span class="Delimiter">;</span>
+<span id="L41" class="LineNr">41 </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; length<span class="Delimiter">;</span>  ++i<span class="Delimiter">)</span>
+<span id="L42" class="LineNr">42 </span>    <a href='010core.cc.html#L67'>Mem</a><span class="Delimiter">.</span>at<span class="Delimiter">(</span>p_vaddr + i<span class="Delimiter">)</span> = elf_contents[i]<span class="Delimiter">;</span>
+<span id="L43" class="LineNr">43 </span>  <a href='010core.cc.html#L68'>End_of_program</a> = p_memsz<span class="Delimiter">;</span>
+<span id="L44" class="LineNr">44 </span>
+<span id="L45" class="LineNr">45 </span>  <span class="Comment">// </span><span class="Todo">TODO</span><span class="Comment">: need to set up real stack somewhere</span>
+<span id="L46" class="LineNr">46 </span>
+<span id="L47" class="LineNr">47 </span>  Reg[ESP]<span class="Delimiter">.</span>u = Reg[EBP]<span class="Delimiter">.</span>u = <a href='010core.cc.html#L68'>End_of_program</a><span class="Delimiter">;</span>
+<span id="L48" class="LineNr">48 </span>  <a href='010core.cc.html#L23'>EIP</a> = e_entry<span class="Delimiter">;</span>
+<span id="L49" class="LineNr">49 </span><span class="Delimiter">}</span>
+<span id="L50" class="LineNr">50 </span>
+<span id="L51" class="LineNr">51 </span><span class="Normal">inline</span> <span class="Normal">uint32_t</span> <a href='020elf.cc.html#L51'>u32_in</a><span class="Delimiter">(</span><span class="Normal">uint8_t</span>* p<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<span id="L52" class="LineNr">52 </span>  <span class="Identifier">return</span> p[<span class="Constant">0</span>] | p[<span class="Constant">1</span>] &lt;&lt; <span class="Constant">8</span> | p[<span class="Constant">2</span>] &lt;&lt; <span class="Constant">16</span> | p[<span class="Constant">3</span>] &lt;&lt; <span class="Constant">24</span><span class="Delimiter">;</span>
+<span id="L53" class="LineNr">53 </span><span class="Delimiter">}</span>
+<span id="L54" class="LineNr">54 </span>
+<span id="L55" class="LineNr">55 </span><span class="Normal">void</span> <a href='020elf.cc.html#L55'>die</a><span class="Delimiter">(</span><span class="Normal">const</span> <span class="Normal">char</span>* format<span class="Delimiter">,</span> <span class="Delimiter">...)</span> <span class="Delimiter">{</span>
+<span id="L56" class="LineNr">56 </span>  <span class="Normal">va_list</span> args<span class="Delimiter">;</span>
+<span id="L57" class="LineNr">57 </span>  va_start<span class="Delimiter">(</span>args<span class="Delimiter">,</span> format<span class="Delimiter">);</span>
+<span id="L58" class="LineNr">58 </span>  vfprintf<span class="Delimiter">(</span><span class="Constant">stderr</span><span class="Delimiter">,</span> format<span class="Delimiter">,</span> args<span class="Delimiter">);</span>
+<span id="L59" class="LineNr">59 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>errno<span class="Delimiter">)</span>
+<span id="L60" class="LineNr">60 </span>    perror<span class="Delimiter">(</span><span class="Constant">&quot;&lt;200c&gt;&quot;</span><span class="Delimiter">);</span>
+<span id="L61" class="LineNr">61 </span>  <span class="Normal">else</span>
+<span id="L62" class="LineNr">62 </span>    fprintf<span class="Delimiter">(</span><span class="Constant">stderr</span><span class="Delimiter">,</span> <span class="Constant">&quot;</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">);</span>
+<span id="L63" class="LineNr">63 </span>  va_end<span class="Delimiter">(</span>args<span class="Delimiter">);</span>
+<span id="L64" class="LineNr">64 </span>  abort<span class="Delimiter">();</span>
+<span id="L65" class="LineNr">65 </span><span class="Delimiter">}</span>
+<span id="L66" class="LineNr">66 </span>
+<span id="L67" class="LineNr">67 </span><span class="Delimiter">:(before &quot;End Types&quot;)</span>
+<span id="L68" class="LineNr">68 </span><span class="PreProc">#include </span><span class="Constant">&lt;sys/types.h&gt;</span>
+<span id="L69" class="LineNr">69 </span><span class="PreProc">#include </span><span class="Constant">&lt;sys/stat.h&gt;</span>
+<span id="L70" class="LineNr">70 </span><span class="PreProc">#include </span><span class="Constant">&lt;fcntl.h&gt;</span>
+<span id="L71" class="LineNr">71 </span><span class="PreProc">#include </span><span class="Constant">&lt;unistd.h&gt;</span>
+<span id="L72" class="LineNr">72 </span><span class="PreProc">#include </span><span class="Constant">&lt;stdarg.h&gt;</span>
+<span id="L73" class="LineNr">73 </span><span class="PreProc">#include </span><span class="Constant">&lt;errno.h&gt;</span>
+</pre>
+</body>
+</html>
+<!-- vim: set foldmethod=manual : -->
author	Kartik K. Agaram <vc@akkartik.com>	2018-01-25 22:39:31 -0800
committer	Kartik K. Agaram <vc@akkartik.com>	2018-01-25 22:39:31 -0800
commit	805d58c6aeeeba3e4989c0eed6781b3861e8fae0 (patch)
tree	ea5225bdd7c5fbeea912671cdc5f1c4b2b2828d7 /html/subx/020elf.cc.html
parent	aefa8fec6a473be459a2ff33e6bd96e7c22ced20 (diff)
download	mu-805d58c6aeeeba3e4989c0eed6781b3861e8fae0.tar.gz