diff options
Diffstat (limited to 'html/subx/012elf.cc.html')
| -rw-r--r-- | html/subx/012elf.cc.html | 71 |
1 files changed, 36 insertions, 35 deletions
diff --git a/html/subx/012elf.cc.html b/html/subx/012elf.cc.html index 565f3d44..06a6ed4c 100644 --- a/html/subx/012elf.cc.html +++ b/html/subx/012elf.cc.html @@ -18,6 +18,7 @@ a:hover { text-decoration: underline; } .LineNr { color: #444444; } .Constant { color: #00a0a0; } .Delimiter { color: #800080; } +.Special { color: #c00000; } .Identifier { color: #c0a020; } .Normal { color: #aaaaaa; background-color: #080808; padding-bottom: 1px; } .Comment { color: #9090ff; } @@ -69,9 +70,9 @@ if ('onhashchange' in window) { <span id="L10" class="LineNr"> 10 </span> <a href='000organization.cc.html#L148'>reset</a><span class="Delimiter">();</span> <span id="L11" class="LineNr"> 11 </span> cerr << std::hex<span class="Delimiter">;</span> <span id="L12" class="LineNr"> 12 </span> <a href='012elf.cc.html#L20'>load_elf</a><span class="Delimiter">(</span>argv[<span class="Constant">2</span>]<span class="Delimiter">,</span> argc<span class="Delimiter">,</span> argv<span class="Delimiter">);</span> -<span id="L13" class="LineNr"> 13 </span> <span class="Normal">while</span> <span class="Delimiter">(</span><a href='010---vm.cc.html#L29'>EIP</a> < <a href='010---vm.cc.html#L185'>End_of_program</a><span class="Delimiter">)</span> <span class="Comment">// weak final-gasp termination check</span> -<span id="L14" class="LineNr"> 14 </span> <a href='010---vm.cc.html#L287'>run_one_instruction</a><span class="Delimiter">();</span> -<span id="L15" class="LineNr"> 15 </span> <a href='003trace.cc.html#L210'>raise</a> << <span class="Constant">"executed past end of the world: "</span> << <a href='010---vm.cc.html#L29'>EIP</a> << <span class="Constant">" vs "</span> << <a href='010---vm.cc.html#L185'>End_of_program</a> << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span> +<span id="L13" class="LineNr"> 13 </span> <span class="Normal">while</span> <span class="Delimiter">(</span><a href='010---vm.cc.html#L29'>EIP</a> < <span class="Special"><a href='010---vm.cc.html#L194'>End_of_program</a></span><span class="Delimiter">)</span> <span class="Comment">// weak final-gasp termination check</span> +<span id="L14" class="LineNr"> 14 </span> <a href='010---vm.cc.html#L296'>run_one_instruction</a><span class="Delimiter">();</span> +<span id="L15" class="LineNr"> 15 </span> <a href='003trace.cc.html#L210'>raise</a> << <span class="Constant">"executed past end of the world: "</span> << <a href='010---vm.cc.html#L29'>EIP</a> << <span class="Constant">" vs "</span> << <span class="Special"><a href='010---vm.cc.html#L194'>End_of_program</a></span> << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span> <span id="L16" class="LineNr"> 16 </span> <span class="Identifier">return</span> <span class="Constant">1</span><span class="Delimiter">;</span> <span id="L17" class="LineNr"> 17 </span><span class="Delimiter">}</span> <span id="L18" class="LineNr"> 18 </span> @@ -92,23 +93,23 @@ if ('onhashchange' in window) { <span id="L33" class="LineNr"> 33 </span><span class="Normal">void</span> <a href='012elf.cc.html#L33'>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> size<span class="Delimiter">,</span> <span class="Normal">int</span> argc<span class="Delimiter">,</span> <span class="Normal">char</span>* argv[]<span class="Delimiter">)</span> <span class="Delimiter">{</span> <span id="L34" class="LineNr"> 34 </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="L35" class="LineNr"> 35 </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="L36" class="LineNr"> 36 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>memcmp<span class="Delimiter">(</span>magic<span class="Delimiter">,</span> <span class="Constant">"</span><span class="cSpecial">\177</span><span class="Constant">ELF"</span><span class="Delimiter">,</span> <span class="Constant">4</span><span class="Delimiter">)</span> != <span class="Constant">0</span><span class="Delimiter">)</span> -<span id="L37" class="LineNr"> 37 </span> <a href='003trace.cc.html#L210'>raise</a> << <span class="Constant">"Invalid ELF file; starts with </span><span class="cSpecial">\"</span><span class="Constant">"</span> << magic << <span class="Constant">'"'</span> << <a href='012elf.cc.html#L168'>die</a><span class="Delimiter">();</span> +<span id="L36" class="LineNr"> 36 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>memcmp<span class="Delimiter">(</span>magic<span class="Delimiter">,</span> <span class="Constant">"\177ELF"</span><span class="Delimiter">,</span> <span class="Constant">4</span><span class="Delimiter">)</span> != <span class="Constant">0</span><span class="Delimiter">)</span> +<span id="L37" class="LineNr"> 37 </span> <a href='003trace.cc.html#L210'>raise</a> << <span class="Constant">"Invalid ELF file; starts with \"" << magic << '"</span>' << <a href='012elf.cc.html#L168'>die</a><span class="Delimiter">();</span> <span id="L38" class="LineNr"> 38 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>elf_contents[<span class="Constant">4</span>] != <span class="Constant">1</span><span class="Delimiter">)</span> -<span id="L39" class="LineNr"> 39 </span> <a href='003trace.cc.html#L210'>raise</a> << <span class="Constant">"Only 32-bit ELF files (4-byte words; virtual addresses up to 4GB) supported.</span><span class="cSpecial">\n</span><span class="Constant">"</span> << <a href='012elf.cc.html#L168'>die</a><span class="Delimiter">();</span> +<span id="L39" class="LineNr"> 39 </span> <a href='003trace.cc.html#L210'>raise</a> << <span class="Constant">"Only 32-bit ELF files (4-byte words; virtual addresses up to 4GB) supported.\n"</span> << <a href='012elf.cc.html#L168'>die</a><span class="Delimiter">();</span> <span id="L40" class="LineNr"> 40 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>elf_contents[<span class="Constant">5</span>] != <span class="Constant">1</span><span class="Delimiter">)</span> -<span id="L41" class="LineNr"> 41 </span> <a href='003trace.cc.html#L210'>raise</a> << <span class="Constant">"Only little-endian ELF files supported.</span><span class="cSpecial">\n</span><span class="Constant">"</span> << <a href='012elf.cc.html#L168'>die</a><span class="Delimiter">();</span> +<span id="L41" class="LineNr"> 41 </span> <a href='003trace.cc.html#L210'>raise</a> << <span class="Constant">"Only little-endian ELF files supported.\n"</span> << <a href='012elf.cc.html#L168'>die</a><span class="Delimiter">();</span> <span id="L42" class="LineNr"> 42 </span> <span class="Comment">// unused: remaining 10 bytes of e_ident</span> <span id="L43" class="LineNr"> 43 </span> <span class="Normal">uint32_t</span> e_machine_type = <a href='012elf.cc.html#L150'>u32_in</a><span class="Delimiter">(</span>&elf_contents[<span class="Constant">16</span>]<span class="Delimiter">);</span> <span id="L44" class="LineNr"> 44 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>e_machine_type != <span class="Constant">0x00030002</span><span class="Delimiter">)</span> -<span id="L45" class="LineNr"> 45 </span> <a href='003trace.cc.html#L210'>raise</a> << <span class="Constant">"ELF type/machine 0x"</span> << <a href='010---vm.cc.html#L404'>HEXWORD</a> << e_machine_type << <span class="Constant">" isn't i386 executable</span><span class="cSpecial">\n</span><span class="Constant">"</span> << die<span class="Delimiter">();</span> +<span id="L45" class="LineNr"> 45 </span> <a href='003trace.cc.html#L210'>raise</a> << <span class="Constant">"ELF type/machine 0x"</span> << <a href='010---vm.cc.html#L413'>HEXWORD</a> << e_machine_type << <span class="Constant">" isn't i386 executable\n"</span> << die<span class="Delimiter">();</span> <span id="L46" class="LineNr"> 46 </span> <span class="Comment">// unused: e_version. We only support version 1, and later versions will be backwards compatible.</span> <span id="L47" class="LineNr"> 47 </span> <span class="Normal">uint32_t</span> e_entry = <a href='012elf.cc.html#L150'>u32_in</a><span class="Delimiter">(</span>&elf_contents[<span class="Constant">24</span>]<span class="Delimiter">);</span> <span id="L48" class="LineNr"> 48 </span> <span class="Normal">uint32_t</span> e_phoff = <a href='012elf.cc.html#L150'>u32_in</a><span class="Delimiter">(</span>&elf_contents[<span class="Constant">28</span>]<span class="Delimiter">);</span> <span id="L49" class="LineNr"> 49 </span> <span class="Comment">// unused: e_shoff</span> <span id="L50" class="LineNr"> 50 </span> <span class="Comment">// unused: e_flags</span> <span id="L51" class="LineNr"> 51 </span> <span class="Normal">uint32_t</span> e_ehsize = <a href='012elf.cc.html#L154'>u16_in</a><span class="Delimiter">(</span>&elf_contents[<span class="Constant">40</span>]<span class="Delimiter">);</span> -<span id="L52" class="LineNr"> 52 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>e_ehsize < <span class="Constant">52</span><span class="Delimiter">)</span> <a href='003trace.cc.html#L210'>raise</a> << <span class="Constant">"Invalid binary; ELF header too small</span><span class="cSpecial">\n</span><span class="Constant">"</span> << <a href='012elf.cc.html#L168'>die</a><span class="Delimiter">();</span> +<span id="L52" class="LineNr"> 52 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>e_ehsize < <span class="Constant">52</span><span class="Delimiter">)</span> <a href='003trace.cc.html#L210'>raise</a> << <span class="Constant">"Invalid binary; ELF header too small\n"</span> << <a href='012elf.cc.html#L168'>die</a><span class="Delimiter">();</span> <span id="L53" class="LineNr"> 53 </span> <span class="Normal">uint32_t</span> e_phentsize = <a href='012elf.cc.html#L154'>u16_in</a><span class="Delimiter">(</span>&elf_contents[<span class="Constant">42</span>]<span class="Delimiter">);</span> <span id="L54" class="LineNr"> 54 </span> <span class="Normal">uint32_t</span> e_phnum = <a href='012elf.cc.html#L154'>u16_in</a><span class="Delimiter">(</span>&elf_contents[<span class="Constant">44</span>]<span class="Delimiter">);</span> <span id="L55" class="LineNr"> 55 </span> <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"load"</span><span class="Delimiter">)</span> << e_phnum << <span class="Constant">" entries in the <a href='011run.cc.html#L99'>program</a> header, each "</span> << e_phentsize << <span class="Constant">" bytes long"</span> << end<span class="Delimiter">();</span> @@ -122,34 +123,34 @@ if ('onhashchange' in window) { <span id="L63" class="LineNr"> 63 </span> <span id="L64" class="LineNr"> 64 </span> <span class="Comment">// initialize code and stack</span> <span id="L65" class="LineNr"> 65 </span> assert<span class="Delimiter">(</span>overlap<span class="Delimiter">.</span>find<span class="Delimiter">(</span><a href='012elf.cc.html#L137'>STACK_SEGMENT</a><span class="Delimiter">)</span> == overlap<span class="Delimiter">.</span>end<span class="Delimiter">());</span> -<span id="L66" class="LineNr"> 66 </span> <a href='010---vm.cc.html#L171'>Mem</a><span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>vma<span class="Delimiter">(</span><a href='012elf.cc.html#L137'>STACK_SEGMENT</a><span class="Delimiter">));</span> +<span id="L66" class="LineNr"> 66 </span> <span class="Special"><a href='010---vm.cc.html#L180'>Mem</a></span><span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>vma<span class="Delimiter">(</span><a href='012elf.cc.html#L137'>STACK_SEGMENT</a><span class="Delimiter">));</span> <span id="L67" class="LineNr"> 67 </span> assert<span class="Delimiter">(</span>overlap<span class="Delimiter">.</span>find<span class="Delimiter">(</span><a href='012elf.cc.html#L138'>AFTER_STACK</a><span class="Delimiter">)</span> == overlap<span class="Delimiter">.</span>end<span class="Delimiter">());</span> -<span id="L68" class="LineNr"> 68 </span> Reg[ESP]<span class="Delimiter">.</span>u = <a href='012elf.cc.html#L138'>AFTER_STACK</a><span class="Delimiter">;</span> -<span id="L69" class="LineNr"> 69 </span> Reg[EBP]<span class="Delimiter">.</span>u = <span class="Constant">0</span><span class="Delimiter">;</span> +<span id="L68" class="LineNr"> 68 </span> <span class="Special"><a href='010---vm.cc.html#L28'>Reg</a></span>[ESP]<span class="Delimiter">.</span>u = <a href='012elf.cc.html#L138'>AFTER_STACK</a><span class="Delimiter">;</span> +<span id="L69" class="LineNr"> 69 </span> <span class="Special"><a href='010---vm.cc.html#L28'>Reg</a></span>[EBP]<span class="Delimiter">.</span>u = <span class="Constant">0</span><span class="Delimiter">;</span> <span id="L70" class="LineNr"> 70 </span> <a href='010---vm.cc.html#L29'>EIP</a> = e_entry<span class="Delimiter">;</span> <span id="L71" class="LineNr"> 71 </span> <span id="L72" class="LineNr"> 72 </span> <span class="Comment">// initialize args on stack</span> <span id="L73" class="LineNr"> 73 </span> <span class="Comment">// no envp for now</span> <span id="L74" class="LineNr"> 74 </span> <span class="Comment">// we wastefully use a separate page of memory for argv</span> -<span id="L75" class="LineNr"> 75 </span> <a href='010---vm.cc.html#L171'>Mem</a><span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>vma<span class="Delimiter">(</span><a href='012elf.cc.html#L139'>ARGV_DATA_SEGMENT</a><span class="Delimiter">));</span> +<span id="L75" class="LineNr"> 75 </span> <span class="Special"><a href='010---vm.cc.html#L180'>Mem</a></span><span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>vma<span class="Delimiter">(</span><a href='012elf.cc.html#L139'>ARGV_DATA_SEGMENT</a><span class="Delimiter">));</span> <span id="L76" class="LineNr"> 76 </span> <span class="Normal">uint32_t</span> argv_data = <a href='012elf.cc.html#L139'>ARGV_DATA_SEGMENT</a><span class="Delimiter">;</span> <span id="L77" class="LineNr"> 77 </span> <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = argc-<span class="Constant">1</span><span class="Delimiter">;</span> i >= <span class="Comment">/*</span><span class="Comment">skip 'subx_bin' and 'run'</span><span class="Comment">*/</span><span class="Constant">2</span><span class="Delimiter">;</span> --i<span class="Delimiter">)</span> <span class="Delimiter">{</span> <span id="L78" class="LineNr"> 78 </span> <a href='012elf.cc.html#L89'>push</a><span class="Delimiter">(</span>argv_data<span class="Delimiter">);</span> <span id="L79" class="LineNr"> 79 </span> <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">size_t</span> j = <span class="Constant">0</span><span class="Delimiter">;</span> j <= strlen<span class="Delimiter">(</span>argv[i]<span class="Delimiter">);</span> ++j<span class="Delimiter">)</span> <span class="Delimiter">{</span> <span id="L80" class="LineNr"> 80 </span> assert<span class="Delimiter">(</span>overlap<span class="Delimiter">.</span>find<span class="Delimiter">(</span>argv_data<span class="Delimiter">)</span> == overlap<span class="Delimiter">.</span>end<span class="Delimiter">());</span> <span class="Comment">// don't bother comparing ARGV and STACK</span> -<span id="L81" class="LineNr"> 81 </span> <a href='010---vm.cc.html#L254'>write_mem_u8</a><span class="Delimiter">(</span>argv_data<span class="Delimiter">,</span> argv[i][j]<span class="Delimiter">);</span> +<span id="L81" class="LineNr"> 81 </span> <a href='010---vm.cc.html#L263'>write_mem_u8</a><span class="Delimiter">(</span>argv_data<span class="Delimiter">,</span> argv[i][j]<span class="Delimiter">);</span> <span id="L82" class="LineNr"> 82 </span> argv_data += <span class="Normal">sizeof</span><span class="Delimiter">(</span><span class="Normal">char</span><span class="Delimiter">);</span> -<span id="L83" class="LineNr"> 83 </span> assert<span class="Delimiter">(</span>argv_data < <a href='012elf.cc.html#L139'>ARGV_DATA_SEGMENT</a> + <a href='010---vm.cc.html#L115'>INITIAL_SEGMENT_SIZE</a><span class="Delimiter">);</span> +<span id="L83" class="LineNr"> 83 </span> assert<span class="Delimiter">(</span>argv_data < <a href='012elf.cc.html#L139'>ARGV_DATA_SEGMENT</a> + <a href='010---vm.cc.html#L115'>SEGMENT_ALIGNMENT</a><span class="Delimiter">);</span> <span id="L84" class="LineNr"> 84 </span> <span class="Delimiter">}</span> <span id="L85" class="LineNr"> 85 </span> <span class="Delimiter">}</span> <span id="L86" class="LineNr"> 86 </span> <a href='012elf.cc.html#L89'>push</a><span class="Delimiter">(</span>argc-<span class="Comment">/*</span><span class="Comment">skip 'subx_bin' and 'run'</span><span class="Comment">*/</span><span class="Constant">2</span><span class="Delimiter">);</span> <span id="L87" class="LineNr"> 87 </span><span class="Delimiter">}</span> <span id="L88" class="LineNr"> 88 </span> <span id="L89" class="LineNr"> 89 </span><span class="Normal">void</span> <a href='012elf.cc.html#L89'>push</a><span class="Delimiter">(</span><span class="Normal">uint32_t</span> val<span class="Delimiter">)</span> <span class="Delimiter">{</span> -<span id="L90" class="LineNr"> 90 </span> Reg[ESP]<span class="Delimiter">.</span>u -= <span class="Constant">4</span><span class="Delimiter">;</span> -<span id="L91" class="LineNr"> 91 </span> <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"decrementing <a href='010---vm.cc.html#L17'>ESP</a> to 0x"</span> << <a href='010---vm.cc.html#L404'>HEXWORD</a> << Reg[ESP]<span class="Delimiter">.</span>u << end<span class="Delimiter">();</span> -<span id="L92" class="LineNr"> 92 </span> <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"pushing value 0x"</span> << <a href='010---vm.cc.html#L404'>HEXWORD</a> << val << end<span class="Delimiter">();</span> -<span id="L93" class="LineNr"> 93 </span> <a href='010---vm.cc.html#L262'>write_mem_u32</a><span class="Delimiter">(</span>Reg[ESP]<span class="Delimiter">.</span>u<span class="Delimiter">,</span> val<span class="Delimiter">);</span> +<span id="L90" class="LineNr"> 90 </span> <span class="Special"><a href='010---vm.cc.html#L28'>Reg</a></span>[ESP]<span class="Delimiter">.</span>u -= <span class="Constant">4</span><span class="Delimiter">;</span> +<span id="L91" class="LineNr"> 91 </span> <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"decrementing <a href='010---vm.cc.html#L17'>ESP</a> to 0x"</span> << <a href='010---vm.cc.html#L413'>HEXWORD</a> << <span class="Special"><a href='010---vm.cc.html#L28'>Reg</a></span>[ESP]<span class="Delimiter">.</span>u << end<span class="Delimiter">();</span> +<span id="L92" class="LineNr"> 92 </span> <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"pushing value 0x"</span> << <a href='010---vm.cc.html#L413'>HEXWORD</a> << val << end<span class="Delimiter">();</span> +<span id="L93" class="LineNr"> 93 </span> <a href='010---vm.cc.html#L271'>write_mem_u32</a><span class="Delimiter">(</span><span class="Special"><a href='010---vm.cc.html#L28'>Reg</a></span>[ESP]<span class="Delimiter">.</span>u<span class="Delimiter">,</span> val<span class="Delimiter">);</span> <span id="L94" class="LineNr"> 94 </span><span class="Delimiter">}</span> <span id="L95" class="LineNr"> 95 </span> <span id="L96" class="LineNr"> 96 </span><span class="Normal">void</span> <a href='012elf.cc.html#L96'>load_segment_from_program_header</a><span class="Delimiter">(</span><span class="Normal">uint8_t</span>* elf_contents<span class="Delimiter">,</span> <span class="Normal">int</span> segment_index<span class="Delimiter">,</span> <span class="Normal">size_t</span> size<span class="Delimiter">,</span> <span class="Normal">uint32_t</span> offset<span class="Delimiter">,</span> <span class="Normal">uint32_t</span> e_ehsize<span class="Delimiter">,</span> set<<span class="Normal">uint32_t</span>>& overlap<span class="Delimiter">)</span> <span class="Delimiter">{</span> @@ -161,29 +162,29 @@ if ('onhashchange' in window) { <span id="L102" class="LineNr">102 </span> <span class="Delimiter">}</span> <span id="L103" class="LineNr">103 </span> <span class="Normal">uint32_t</span> p_offset = <a href='012elf.cc.html#L150'>u32_in</a><span class="Delimiter">(</span>&elf_contents[offset + <span class="Constant">4</span>]<span class="Delimiter">);</span> <span id="L104" class="LineNr">104 </span> <span class="Normal">uint32_t</span> p_vaddr = <a href='012elf.cc.html#L150'>u32_in</a><span class="Delimiter">(</span>&elf_contents[offset + <span class="Constant">8</span>]<span class="Delimiter">);</span> -<span id="L105" class="LineNr">105 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>e_ehsize > p_vaddr<span class="Delimiter">)</span> <a href='003trace.cc.html#L210'>raise</a> << <span class="Constant">"Invalid binary; <a href='011run.cc.html#L99'>program</a> header overlaps ELF header</span><span class="cSpecial">\n</span><span class="Constant">"</span> << <a href='012elf.cc.html#L168'>die</a><span class="Delimiter">();</span> +<span id="L105" class="LineNr">105 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>e_ehsize > p_vaddr<span class="Delimiter">)</span> <a href='003trace.cc.html#L210'>raise</a> << <span class="Constant">"Invalid binary; <a href='011run.cc.html#L99'>program</a> header overlaps ELF header\n"</span> << <a href='012elf.cc.html#L168'>die</a><span class="Delimiter">();</span> <span id="L106" class="LineNr">106 </span> <span class="Comment">// unused: p_paddr</span> <span id="L107" class="LineNr">107 </span> <span class="Normal">uint32_t</span> p_filesz = <a href='012elf.cc.html#L150'>u32_in</a><span class="Delimiter">(</span>&elf_contents[offset + <span class="Constant">16</span>]<span class="Delimiter">);</span> <span id="L108" class="LineNr">108 </span> <span class="Normal">uint32_t</span> p_memsz = <a href='012elf.cc.html#L150'>u32_in</a><span class="Delimiter">(</span>&elf_contents[offset + <span class="Constant">20</span>]<span class="Delimiter">);</span> <span id="L109" class="LineNr">109 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>p_filesz != p_memsz<span class="Delimiter">)</span> -<span id="L110" class="LineNr">110 </span> <a href='003trace.cc.html#L210'>raise</a> << <span class="Constant">"Can't yet handle segments where p_filesz != p_memsz (see <a href="http://refspecs.linuxbase.org/elf/elf.pdf">http://refspecs.linuxbase.org/elf/elf.pdf</a>)</span><span class="cSpecial">\n</span><span class="Constant">"</span> << die<span class="Delimiter">();</span> +<span id="L110" class="LineNr">110 </span> <a href='003trace.cc.html#L210'>raise</a> << <span class="Constant">"Can't yet handle segments where p_filesz != p_memsz (see <a href="http://refspecs.linuxbase.org/elf/elf.pdf">http://refspecs.linuxbase.org/elf/elf.pdf</a>)\n"</span> << die<span class="Delimiter">();</span> <span id="L111" class="LineNr">111 </span> <span id="L112" class="LineNr">112 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>p_offset + p_filesz > size<span class="Delimiter">)</span> <span id="L113" class="LineNr">113 </span> <a href='003trace.cc.html#L210'>raise</a> << <span class="Constant">"Invalid binary; segment at offset "</span> << offset << <span class="Constant">" is too large: wants to end at "</span> << p_offset+p_filesz << <span class="Constant">" but the file ends at "</span> << size << <span class="cSpecial">'\n'</span> << <a href='012elf.cc.html#L168'>die</a><span class="Delimiter">();</span> -<span id="L114" class="LineNr">114 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>p_memsz >= <a href='010---vm.cc.html#L115'>INITIAL_SEGMENT_SIZE</a><span class="Delimiter">)</span> <span class="Delimiter">{</span> -<span id="L115" class="LineNr">115 </span> <a href='003trace.cc.html#L210'>raise</a> << <span class="Constant">"Code segment too small for SubX; for now please manually increase INITIAL_SEGMENT_SIZE.</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> +<span id="L114" class="LineNr">114 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>p_memsz >= <a href='010---vm.cc.html#L115'>SEGMENT_ALIGNMENT</a><span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span id="L115" class="LineNr">115 </span> <a href='003trace.cc.html#L210'>raise</a> << <span class="Constant">"Code segment too small for SubX; for now please manually increase SEGMENT_ALIGNMENT.\n"</span> << end<span class="Delimiter">();</span> <span id="L116" class="LineNr">116 </span> <span class="Identifier">return</span><span class="Delimiter">;</span> <span id="L117" class="LineNr">117 </span> <span class="Delimiter">}</span> <span id="L118" class="LineNr">118 </span> <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"load"</span><span class="Delimiter">)</span> << <span class="Constant">"blitting file offsets ("</span> << p_offset << <span class="Constant">", "</span> << <span class="Delimiter">(</span>p_offset+p_filesz<span class="Delimiter">)</span> << <span class="Constant">") to addresses ("</span> << p_vaddr << <span class="Constant">", "</span> << <span class="Delimiter">(</span>p_vaddr+p_memsz<span class="Delimiter">)</span> << <span class="Constant">')'</span> << end<span class="Delimiter">();</span> <span id="L119" class="LineNr">119 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>size > p_memsz<span class="Delimiter">)</span> size = p_memsz<span class="Delimiter">;</span> -<span id="L120" class="LineNr">120 </span> <a href='010---vm.cc.html#L171'>Mem</a><span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>vma<span class="Delimiter">(</span>p_vaddr<span class="Delimiter">));</span> +<span id="L120" class="LineNr">120 </span> <span class="Special"><a href='010---vm.cc.html#L180'>Mem</a></span><span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>vma<span class="Delimiter">(</span>p_vaddr<span class="Delimiter">));</span> <span id="L121" class="LineNr">121 </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 < p_filesz<span class="Delimiter">;</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span> <span id="L122" class="LineNr">122 </span> assert<span class="Delimiter">(</span>overlap<span class="Delimiter">.</span>find<span class="Delimiter">(</span>p_vaddr+i<span class="Delimiter">)</span> == overlap<span class="Delimiter">.</span>end<span class="Delimiter">());</span> -<span id="L123" class="LineNr">123 </span> <a href='010---vm.cc.html#L254'>write_mem_u8</a><span class="Delimiter">(</span>p_vaddr+i<span class="Delimiter">,</span> elf_contents[p_offset+i]<span class="Delimiter">);</span> +<span id="L123" class="LineNr">123 </span> <a href='010---vm.cc.html#L263'>write_mem_u8</a><span class="Delimiter">(</span>p_vaddr+i<span class="Delimiter">,</span> elf_contents[p_offset+i]<span class="Delimiter">);</span> <span id="L124" class="LineNr">124 </span> overlap<span class="Delimiter">.</span>insert<span class="Delimiter">(</span>p_vaddr+i<span class="Delimiter">);</span> <span id="L125" class="LineNr">125 </span> <span class="Delimiter">}</span> -<span id="L126" class="LineNr">126 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>segment_index == <span class="Constant">0</span> && <a href='010---vm.cc.html#L185'>End_of_program</a> < p_vaddr+p_memsz<span class="Delimiter">)</span> -<span id="L127" class="LineNr">127 </span> <a href='010---vm.cc.html#L185'>End_of_program</a> = p_vaddr+p_memsz<span class="Delimiter">;</span> +<span id="L126" class="LineNr">126 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>segment_index == <span class="Constant">0</span> && <span class="Special"><a href='010---vm.cc.html#L194'>End_of_program</a></span> < p_vaddr+p_memsz<span class="Delimiter">)</span> +<span id="L127" class="LineNr">127 </span> <span class="Special"><a href='010---vm.cc.html#L194'>End_of_program</a></span> = p_vaddr+p_memsz<span class="Delimiter">;</span> <span id="L128" class="LineNr">128 </span><span class="Delimiter">}</span> <span id="L129" class="LineNr">129 </span> <span id="L130" class="LineNr">130 </span><span class="Delimiter">:(before "End Includes")</span> @@ -194,16 +195,16 @@ if ('onhashchange' in window) { <span id="L135" class="LineNr">135 </span><span class="Normal">const</span> <span class="Normal">int</span> <a href='012elf.cc.html#L135'>CODE_SEGMENT</a> = <span class="Constant">0x09000000</span><span class="Delimiter">;</span> <span id="L136" class="LineNr">136 </span><span class="Normal">const</span> <span class="Normal">int</span> <a href='012elf.cc.html#L136'>DATA_SEGMENT</a> = <span class="Constant">0x0a000000</span><span class="Delimiter">;</span> <span id="L137" class="LineNr">137 </span><span class="Normal">const</span> <span class="Normal">int</span> <a href='012elf.cc.html#L137'>STACK_SEGMENT</a> = <span class="Constant">0x0b000000</span><span class="Delimiter">;</span> -<span id="L138" class="LineNr">138 </span><span class="Normal">const</span> <span class="Normal">int</span> <a href='012elf.cc.html#L138'>AFTER_STACK</a> = <span class="Constant">0x0b000ffc</span><span class="Delimiter">;</span> <span class="Comment">// forget final word because of the off-by-one with INITIAL_SEGMENT_SIZE;</span> +<span id="L138" class="LineNr">138 </span><span class="Normal">const</span> <span class="Normal">int</span> <a href='012elf.cc.html#L138'>AFTER_STACK</a> = <span class="Constant">0x0b000ffc</span><span class="Delimiter">;</span> <span class="Comment">// forget final word because of the off-by-one with SEGMENT_ALIGNMENT;</span> <span id="L139" class="LineNr">139 </span><span class="Normal">const</span> <span class="Normal">int</span> <a href='012elf.cc.html#L139'>ARGV_DATA_SEGMENT</a> = <span class="Constant">0x0c000000</span><span class="Delimiter">;</span> <span id="L140" class="LineNr">140 </span><span class="Delimiter">:(code)</span> <span id="L141" class="LineNr">141 </span><span class="Normal">void</span> <a href='012elf.cc.html#L141'>dump_stack</a><span class="Delimiter">()</span> <span class="Delimiter">{</span> -<span id="L142" class="LineNr">142 </span> cerr << <span class="Constant">"stack:</span><span class="cSpecial">\n</span><span class="Constant">"</span><span class="Delimiter">;</span> -<span id="L143" class="LineNr">143 </span> <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">uint32_t</span> a = AFTER_STACK-<span class="Constant">4</span><span class="Delimiter">;</span> a > Reg[ESP]<span class="Delimiter">.</span>u<span class="Delimiter">;</span> a -= <span class="Constant">4</span><span class="Delimiter">)</span> -<span id="L144" class="LineNr">144 </span> cerr << <span class="Constant">" 0x"</span> << <a href='010---vm.cc.html#L404'>HEXWORD</a> << a << <span class="Constant">" => 0x"</span> << <a href='010---vm.cc.html#L404'>HEXWORD</a> << <a href='010---vm.cc.html#L200'>read_mem_u32</a><span class="Delimiter">(</span>a<span class="Delimiter">)</span> << <span class="cSpecial">'\n'</span><span class="Delimiter">;</span> -<span id="L145" class="LineNr">145 </span> cerr << <span class="Constant">" 0x"</span> << <a href='010---vm.cc.html#L404'>HEXWORD</a> << Reg[ESP]<span class="Delimiter">.</span>u << <span class="Constant">" => 0x"</span> << <a href='010---vm.cc.html#L404'>HEXWORD</a> << <a href='010---vm.cc.html#L200'>read_mem_u32</a><span class="Delimiter">(</span>Reg[ESP]<span class="Delimiter">.</span>u<span class="Delimiter">)</span> << <span class="Constant">" <=== <a href='010---vm.cc.html#L17'>ESP</a></span><span class="cSpecial">\n</span><span class="Constant">"</span><span class="Delimiter">;</span> -<span id="L146" class="LineNr">146 </span> <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">uint32_t</span> a = Reg[ESP]<span class="Delimiter">.</span>u-<span class="Constant">4</span><span class="Delimiter">;</span> a > Reg[ESP]<span class="Delimiter">.</span>u-<span class="Constant">40</span><span class="Delimiter">;</span> a -= <span class="Constant">4</span><span class="Delimiter">)</span> -<span id="L147" class="LineNr">147 </span> cerr << <span class="Constant">" 0x"</span> << <a href='010---vm.cc.html#L404'>HEXWORD</a> << a << <span class="Constant">" => 0x"</span> << <a href='010---vm.cc.html#L404'>HEXWORD</a> << <a href='010---vm.cc.html#L200'>read_mem_u32</a><span class="Delimiter">(</span>a<span class="Delimiter">)</span> << <span class="cSpecial">'\n'</span><span class="Delimiter">;</span> +<span id="L142" class="LineNr">142 </span> cerr << <span class="Constant">"stack:\n"</span><span class="Delimiter">;</span> +<span id="L143" class="LineNr">143 </span> <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">uint32_t</span> a = AFTER_STACK-<span class="Constant">4</span><span class="Delimiter">;</span> a > <span class="Special"><a href='010---vm.cc.html#L28'>Reg</a></span>[ESP]<span class="Delimiter">.</span>u<span class="Delimiter">;</span> a -= <span class="Constant">4</span><span class="Delimiter">)</span> +<span id="L144" class="LineNr">144 </span> cerr << <span class="Constant">" 0x"</span> << <a href='010---vm.cc.html#L413'>HEXWORD</a> << a << <span class="Constant">" => 0x"</span> << <a href='010---vm.cc.html#L413'>HEXWORD</a> << <a href='010---vm.cc.html#L209'>read_mem_u32</a><span class="Delimiter">(</span>a<span class="Delimiter">)</span> << <span class="cSpecial">'\n'</span><span class="Delimiter">;</span> +<span id="L145" class="LineNr">145 </span> cerr << <span class="Constant">" 0x"</span> << <a href='010---vm.cc.html#L413'>HEXWORD</a> << <span class="Special"><a href='010---vm.cc.html#L28'>Reg</a></span>[ESP]<span class="Delimiter">.</span>u << <span class="Constant">" => 0x"</span> << <a href='010---vm.cc.html#L413'>HEXWORD</a> << <a href='010---vm.cc.html#L209'>read_mem_u32</a><span class="Delimiter">(</span><span class="Special"><a href='010---vm.cc.html#L28'>Reg</a></span>[ESP]<span class="Delimiter">.</span>u<span class="Delimiter">)</span> << <span class="Constant">" <=== ESP\n"</span><span class="Delimiter">;</span> +<span id="L146" class="LineNr">146 </span> <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">uint32_t</span> a = <span class="Special"><a href='010---vm.cc.html#L28'>Reg</a></span>[ESP]<span class="Delimiter">.</span>u-<span class="Constant">4</span><span class="Delimiter">;</span> a > <span class="Special"><a href='010---vm.cc.html#L28'>Reg</a></span>[ESP]<span class="Delimiter">.</span>u-<span class="Constant">40</span><span class="Delimiter">;</span> a -= <span class="Constant">4</span><span class="Delimiter">)</span> +<span id="L147" class="LineNr">147 </span> cerr << <span class="Constant">" 0x"</span> << <a href='010---vm.cc.html#L413'>HEXWORD</a> << a << <span class="Constant">" => 0x"</span> << <a href='010---vm.cc.html#L413'>HEXWORD</a> << <a href='010---vm.cc.html#L209'>read_mem_u32</a><span class="Delimiter">(</span>a<span class="Delimiter">)</span> << <span class="cSpecial">'\n'</span><span class="Delimiter">;</span> <span id="L148" class="LineNr">148 </span><span class="Delimiter">}</span> <span id="L149" class="LineNr">149 </span> <span id="L150" class="LineNr">150 </span><span class="Normal">inline</span> <span class="Normal">uint32_t</span> <a href='012elf.cc.html#L150'>u32_in</a><span class="Delimiter">(</span><span class="Normal">uint8_t</span>* p<span class="Delimiter">)</span> <span class="Delimiter">{</span> @@ -227,7 +228,7 @@ if ('onhashchange' in window) { <span id="L168" class="LineNr">168 </span><span class="Normal">struct</span> <a href='012elf.cc.html#L168'>die</a> <span class="Delimiter">{};</span> <span id="L169" class="LineNr">169 </span><span class="Delimiter">:(code)</span> <span id="L170" class="LineNr">170 </span>ostream& <span class="Normal">operator</span><<<span class="Delimiter">(</span>ostream& <span class="Comment">/*</span><span class="Comment">unused</span><span class="Comment">*/</span><span class="Delimiter">,</span> <a href='012elf.cc.html#L168'>die</a> <span class="Comment">/*</span><span class="Comment">unused</span><span class="Comment">*/</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> -<span id="L171" class="LineNr">171 </span> <span class="Normal">if</span> <span class="Delimiter">(</span><a href='003trace.cc.html#L174'>Trace_stream</a><span class="Delimiter">)</span> <a href='003trace.cc.html#L174'>Trace_stream</a><span class="Delimiter">-></span><a href='003trace.cc.html#L147'>newline</a><span class="Delimiter">();</span> +<span id="L171" class="LineNr">171 </span> <span class="Normal">if</span> <span class="Delimiter">(</span><span class="Special"><a href='003trace.cc.html#L174'>Trace_stream</a></span><span class="Delimiter">)</span> <span class="Special"><a href='003trace.cc.html#L174'>Trace_stream</a></span><span class="Delimiter">-></span><a href='003trace.cc.html#L147'>newline</a><span class="Delimiter">();</span> <span id="L172" class="LineNr">172 </span> exit<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span> <span id="L173" class="LineNr">173 </span><span class="Delimiter">}</span> <span id="L174" class="LineNr">174 </span> |