diff options
| author | Kartik Agaram <vc@akkartik.com> | 2018-10-17 07:08:47 -0700 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2018-10-17 07:08:47 -0700 |
| commit | 104e521c04d1a0cad9c68fb11e250e12ad8917ef (patch) | |
| tree | df4258ad26cb78e25abee64c80aedab47aa461ea /html/subx/034compute_segment_address.cc.html | |
| parent | 800320a70c981008302af56b2f35a142c1101401 (diff) | |
| download | mu-104e521c04d1a0cad9c68fb11e250e12ad8917ef.tar.gz | |
4709
Diffstat (limited to 'html/subx/034compute_segment_address.cc.html')
| -rw-r--r-- | html/subx/034compute_segment_address.cc.html | 60 |
1 files changed, 30 insertions, 30 deletions
diff --git a/html/subx/034compute_segment_address.cc.html b/html/subx/034compute_segment_address.cc.html index e8820050..c180ef12 100644 --- a/html/subx/034compute_segment_address.cc.html +++ b/html/subx/034compute_segment_address.cc.html @@ -64,14 +64,14 @@ if ('onhashchange' in window) { <span id="L3" class="LineNr"> 3 </span><span class="Comment">//: This gives up a measure of control in placing code and data.</span> <span id="L4" class="LineNr"> 4 </span> <span id="L5" class="LineNr"> 5 </span><span class="Delimiter">:(scenario segment_name)</span> -<span id="L6" class="LineNr"> 6 </span>== <a href='031check_operands.cc.html#L14'>code</a> -<span id="L7" class="LineNr"> 7 </span><span class="PreProc">0</span><span class="Constant">5</span>/add <span class="Constant">0x0d0c0b0a</span>/imm32 <span class="Comment"># add 0x0d0c0b0a to EAX</span> +<span id="L6" class="LineNr"> 6 </span>== <a href='031check_operands.cc.html#L11'>code</a> +<span id="L7" class="LineNr"> 7 </span><span class="PreProc">0</span><span class="Constant">5</span>/add-to-EAX <span class="Constant">0x0d0c0b0a</span>/imm32 <span id="L8" class="LineNr"> 8 </span><span class="Comment"># code starts at 0x08048000 + p_offset, which is 0x54 for a single-segment binary</span> -<span id="L9" class="LineNr"> 9 </span><span class="traceContains">+load: 0x08048054 -> 05</span> -<span id="L10" class="LineNr"> 10 </span><span class="traceContains">+load: 0x08048055 -> 0a</span> -<span id="L11" class="LineNr"> 11 </span><span class="traceContains">+load: 0x08048056 -> 0b</span> -<span id="L12" class="LineNr"> 12 </span><span class="traceContains">+load: 0x08048057 -> 0c</span> -<span id="L13" class="LineNr"> 13 </span><span class="traceContains">+load: 0x08048058 -> 0d</span> +<span id="L9" class="LineNr"> 9 </span><span class="traceContains">+load: 0x09000054 -> 05</span> +<span id="L10" class="LineNr"> 10 </span><span class="traceContains">+load: 0x09000055 -> 0a</span> +<span id="L11" class="LineNr"> 11 </span><span class="traceContains">+load: 0x09000056 -> 0b</span> +<span id="L12" class="LineNr"> 12 </span><span class="traceContains">+load: 0x09000057 -> 0c</span> +<span id="L13" class="LineNr"> 13 </span><span class="traceContains">+load: 0x09000058 -> 0d</span> <span id="L14" class="LineNr"> 14 </span><span class="traceContains">+run: add imm32 0x0d0c0b0a to <a href='010---vm.cc.html#L23'>reg</a> <a href='010---vm.cc.html#L13'>EAX</a></span> <span id="L15" class="LineNr"> 15 </span><span class="traceContains">+run: storing 0x0d0c0b0a</span> <span id="L16" class="LineNr"> 16 </span> @@ -82,7 +82,7 @@ if ('onhashchange' in window) { <span id="L21" class="LineNr"> 21 </span><span class="Comment">//: the new data to existing data for the segment.</span> <span id="L22" class="LineNr"> 22 </span> <span id="L23" class="LineNr"> 23 </span><span class="Delimiter">:(before "End Globals")</span> -<span id="L24" class="LineNr"> 24 </span>map<<span class="Comment">/*</span><span class="Comment"><a href='010---vm.cc.html#L336'>name</a></span><span class="Comment">*/</span>string<span class="Delimiter">,</span> <span class="Normal">int</span>> <a href='034compute_segment_address.cc.html#L24'>Segment_index</a><span class="Delimiter">;</span> +<span id="L24" class="LineNr"> 24 </span>map<<span class="Comment">/*</span><span class="Comment">name</span><span class="Comment">*/</span>string<span class="Delimiter">,</span> <span class="Normal">int</span>> <a href='034compute_segment_address.cc.html#L24'>Segment_index</a><span class="Delimiter">;</span> <span id="L25" class="LineNr"> 25 </span><span class="Normal">bool</span> <a href='034compute_segment_address.cc.html#L25'>Currently_parsing_named_segment</a> =<span class="Constant"> false</span><span class="Delimiter">;</span> <span class="Comment">// global to permit cross-layer communication</span> <span id="L26" class="LineNr"> 26 </span><span class="Normal">int</span> <a href='034compute_segment_address.cc.html#L26'>Currently_parsing_segment_index</a> = -<span class="Constant">1</span><span class="Delimiter">;</span> <span class="Comment">// global to permit cross-layer communication</span> <span id="L27" class="LineNr"> 27 </span><span class="Delimiter">:(before "End Reset")</span> @@ -94,7 +94,7 @@ if ('onhashchange' in window) { <span id="L33" class="LineNr"> 33 </span><span class="Normal">if</span> <span class="Delimiter">(</span>!starts_with<span class="Delimiter">(</span>segment_title<span class="Delimiter">,</span> <span class="Constant">"0x"</span><span class="Delimiter">))</span> <span class="Delimiter">{</span> <span id="L34" class="LineNr"> 34 </span> <a href='034compute_segment_address.cc.html#L25'>Currently_parsing_named_segment</a> =<span class="Constant"> true</span><span class="Delimiter">;</span> <span id="L35" class="LineNr"> 35 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span><a href='034compute_segment_address.cc.html#L24'>Segment_index</a><span class="Delimiter">,</span> segment_title<span class="Delimiter">))</span> <span class="Delimiter">{</span> -<span id="L36" class="LineNr"> 36 </span> <a href='003trace.cc.html#L204'>trace</a><span class="Delimiter">(</span><span class="Constant">99</span><span class="Delimiter">,</span> <span class="Constant">"parse"</span><span class="Delimiter">)</span> << <span class="Constant">"new segment '"</span> << segment_title << <span class="Constant">"'"</span> << end<span class="Delimiter">();</span> +<span id="L36" class="LineNr"> 36 </span> <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">99</span><span class="Delimiter">,</span> <span class="Constant">"parse"</span><span class="Delimiter">)</span> << <span class="Constant">"new segment '"</span> << segment_title << <span class="Constant">"'"</span> << end<span class="Delimiter">();</span> <span id="L37" class="LineNr"> 37 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>segment_title == <span class="Constant">"code"</span><span class="Delimiter">)</span> <span id="L38" class="LineNr"> 38 </span> <a href='001help.cc.html#L243'>put</a><span class="Delimiter">(</span><a href='034compute_segment_address.cc.html#L24'>Segment_index</a><span class="Delimiter">,</span> segment_title<span class="Delimiter">,</span> <span class="Constant">0</span><span class="Delimiter">);</span> <span id="L39" class="LineNr"> 39 </span> <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>segment_title == <span class="Constant">"data"</span><span class="Delimiter">)</span> @@ -104,7 +104,7 @@ if ('onhashchange' in window) { <span id="L43" class="LineNr"> 43 </span> out<span class="Delimiter">.</span><a href='011run.cc.html#L100'>segments</a><span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>segment<span class="Delimiter">());</span> <span id="L44" class="LineNr"> 44 </span> <span class="Delimiter">}</span> <span id="L45" class="LineNr"> 45 </span> <span class="Normal">else</span> <span class="Delimiter">{</span> -<span id="L46" class="LineNr"> 46 </span> <a href='003trace.cc.html#L204'>trace</a><span class="Delimiter">(</span><span class="Constant">99</span><span class="Delimiter">,</span> <span class="Constant">"parse"</span><span class="Delimiter">)</span> << <span class="Constant">"prepending to segment '"</span> << segment_title << <span class="Constant">"'"</span> << end<span class="Delimiter">();</span> +<span id="L46" class="LineNr"> 46 </span> <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">99</span><span class="Delimiter">,</span> <span class="Constant">"parse"</span><span class="Delimiter">)</span> << <span class="Constant">"prepending to segment '"</span> << segment_title << <span class="Constant">"'"</span> << end<span class="Delimiter">();</span> <span id="L47" class="LineNr"> 47 </span> <span class="Delimiter">}</span> <span id="L48" class="LineNr"> 48 </span> <a href='034compute_segment_address.cc.html#L26'>Currently_parsing_segment_index</a> = get<span class="Delimiter">(</span><a href='034compute_segment_address.cc.html#L24'>Segment_index</a><span class="Delimiter">,</span> segment_title<span class="Delimiter">);</span> <span id="L49" class="LineNr"> 49 </span><span class="Delimiter">}</span> @@ -112,10 +112,10 @@ if ('onhashchange' in window) { <span id="L51" class="LineNr"> 51 </span><span class="Delimiter">:(before "End flush(p, lines) Special-cases")</span> <span id="L52" class="LineNr"> 52 </span><span class="Normal">if</span> <span class="Delimiter">(</span><a href='034compute_segment_address.cc.html#L25'>Currently_parsing_named_segment</a><span class="Delimiter">)</span> <span class="Delimiter">{</span> <span id="L53" class="LineNr"> 53 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>p<span class="Delimiter">.</span><a href='011run.cc.html#L100'>segments</a><span class="Delimiter">.</span>empty<span class="Delimiter">()</span> || <a href='034compute_segment_address.cc.html#L26'>Currently_parsing_segment_index</a> < <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> -<span id="L54" class="LineNr"> 54 </span> <a href='003trace.cc.html#L211'>raise</a> << <span class="Constant">"input does not start with a '==' section header</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> +<span id="L54" class="LineNr"> 54 </span> <a href='003trace.cc.html#L210'>raise</a> << <span class="Constant">"input does not start with a '==' section header</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> <span id="L55" class="LineNr"> 55 </span> <span class="Identifier">return</span><span class="Delimiter">;</span> <span id="L56" class="LineNr"> 56 </span> <span class="Delimiter">}</span> -<span id="L57" class="LineNr"> 57 </span> <a href='003trace.cc.html#L204'>trace</a><span class="Delimiter">(</span><span class="Constant">99</span><span class="Delimiter">,</span> <span class="Constant">"parse"</span><span class="Delimiter">)</span> << <span class="Constant">"flushing to segment"</span> << end<span class="Delimiter">();</span> +<span id="L57" class="LineNr"> 57 </span> <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">99</span><span class="Delimiter">,</span> <span class="Constant">"parse"</span><span class="Delimiter">)</span> << <span class="Constant">"flushing to segment"</span> << end<span class="Delimiter">();</span> <span id="L58" class="LineNr"> 58 </span> vector<line>& curr_segment_data = p<span class="Delimiter">.</span><a href='011run.cc.html#L100'>segments</a><span class="Delimiter">.</span>at<span class="Delimiter">(</span><a href='034compute_segment_address.cc.html#L26'>Currently_parsing_segment_index</a><span class="Delimiter">).</span><a href='011run.cc.html#L109'>lines</a><span class="Delimiter">;</span> <span id="L59" class="LineNr"> 59 </span> curr_segment_data<span class="Delimiter">.</span>insert<span class="Delimiter">(</span>curr_segment_data<span class="Delimiter">.</span>begin<span class="Delimiter">(),</span> <a href='011run.cc.html#L109'>lines</a><span class="Delimiter">.</span>begin<span class="Delimiter">(),</span> <a href='011run.cc.html#L109'>lines</a><span class="Delimiter">.</span>end<span class="Delimiter">());</span> <span id="L60" class="LineNr"> 60 </span> <a href='011run.cc.html#L109'>lines</a><span class="Delimiter">.</span>clear<span class="Delimiter">();</span> @@ -125,22 +125,22 @@ if ('onhashchange' in window) { <span id="L64" class="LineNr"> 64 </span><span class="Delimiter">}</span> <span id="L65" class="LineNr"> 65 </span> <span id="L66" class="LineNr"> 66 </span><span class="Delimiter">:(scenario repeated_segment_merges_data)</span> -<span id="L67" class="LineNr"> 67 </span>== <a href='031check_operands.cc.html#L14'>code</a> -<span id="L68" class="LineNr"> 68 </span><span class="PreProc">0</span><span class="Constant">5</span>/add <span class="Constant">0x0d0c0b0a</span>/imm32 <span class="Comment"># add 0x0d0c0b0a to EAX</span> -<span id="L69" class="LineNr"> 69 </span>== <a href='031check_operands.cc.html#L14'>code</a> -<span id="L70" class="LineNr"> 70 </span>2d/subtract <span class="Constant">0xddccbbaa</span>/imm32 <span class="Comment"># subtract 0xddccbbaa from EAX</span> +<span id="L67" class="LineNr"> 67 </span>== <a href='031check_operands.cc.html#L11'>code</a> +<span id="L68" class="LineNr"> 68 </span><span class="PreProc">0</span><span class="Constant">5</span>/add-to-EAX <span class="Constant">0x0d0c0b0a</span>/imm32 +<span id="L69" class="LineNr"> 69 </span>== <a href='031check_operands.cc.html#L11'>code</a> +<span id="L70" class="LineNr"> 70 </span>2d/subtract-from-EAX <span class="Constant">0xddccbbaa</span>/imm32 <span id="L71" class="LineNr"> 71 </span><span class="traceContains">+parse: new segment 'code'</span> <span id="L72" class="LineNr"> 72 </span><span class="traceContains">+parse: prepending to segment 'code'</span> -<span id="L73" class="LineNr"> 73 </span><span class="traceContains">+load: 0x08048054 -> 2d</span> -<span id="L74" class="LineNr"> 74 </span><span class="traceContains">+load: 0x08048055 -> aa</span> -<span id="L75" class="LineNr"> 75 </span><span class="traceContains">+load: 0x08048056 -> bb</span> -<span id="L76" class="LineNr"> 76 </span><span class="traceContains">+load: 0x08048057 -> cc</span> -<span id="L77" class="LineNr"> 77 </span><span class="traceContains">+load: 0x08048058 -> dd</span> -<span id="L78" class="LineNr"> 78 </span><span class="traceContains">+load: 0x08048059 -> 05</span> -<span id="L79" class="LineNr"> 79 </span><span class="traceContains">+load: 0x0804805a -> 0a</span> -<span id="L80" class="LineNr"> 80 </span><span class="traceContains">+load: 0x0804805b -> 0b</span> -<span id="L81" class="LineNr"> 81 </span><span class="traceContains">+load: 0x0804805c -> 0c</span> -<span id="L82" class="LineNr"> 82 </span><span class="traceContains">+load: 0x0804805d -> 0d</span> +<span id="L73" class="LineNr"> 73 </span><span class="traceContains">+load: 0x09000054 -> 2d</span> +<span id="L74" class="LineNr"> 74 </span><span class="traceContains">+load: 0x09000055 -> aa</span> +<span id="L75" class="LineNr"> 75 </span><span class="traceContains">+load: 0x09000056 -> bb</span> +<span id="L76" class="LineNr"> 76 </span><span class="traceContains">+load: 0x09000057 -> cc</span> +<span id="L77" class="LineNr"> 77 </span><span class="traceContains">+load: 0x09000058 -> dd</span> +<span id="L78" class="LineNr"> 78 </span><span class="traceContains">+load: 0x09000059 -> 05</span> +<span id="L79" class="LineNr"> 79 </span><span class="traceContains">+load: 0x0900005a -> 0a</span> +<span id="L80" class="LineNr"> 80 </span><span class="traceContains">+load: 0x0900005b -> 0b</span> +<span id="L81" class="LineNr"> 81 </span><span class="traceContains">+load: 0x0900005c -> 0c</span> +<span id="L82" class="LineNr"> 82 </span><span class="traceContains">+load: 0x0900005d -> 0d</span> <span id="L83" class="LineNr"> 83 </span> <span id="L84" class="LineNr"> 84 </span><span class="Comment">//: compute segment address</span> <span id="L85" class="LineNr"> 85 </span> @@ -149,16 +149,16 @@ if ('onhashchange' in window) { <span id="L88" class="LineNr"> 88 </span> <span id="L89" class="LineNr"> 89 </span><span class="Delimiter">:(code)</span> <span id="L90" class="LineNr"> 90 </span><span class="Normal">void</span> <a href='034compute_segment_address.cc.html#L90'>compute_segment_starts</a><span class="Delimiter">(</span>program& p<span class="Delimiter">)</span> <span class="Delimiter">{</span> -<span id="L91" class="LineNr"> 91 </span> <a href='003trace.cc.html#L204'>trace</a><span class="Delimiter">(</span><span class="Constant">99</span><span class="Delimiter">,</span> <span class="Constant">"transform"</span><span class="Delimiter">)</span> << <span class="Constant">"-- compute segment addresses"</span> << end<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">99</span><span class="Delimiter">,</span> <span class="Constant">"transform"</span><span class="Delimiter">)</span> << <span class="Constant">"-- compute segment addresses"</span> << end<span class="Delimiter">();</span> <span id="L92" class="LineNr"> 92 </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="L93" class="LineNr"> 93 </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<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 class="Delimiter">{</span> <span id="L94" class="LineNr"> 94 </span> segment& curr = 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="L95" class="LineNr"> 95 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>curr<span class="Delimiter">.</span>start == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> -<span id="L96" class="LineNr"> 96 </span> curr<span class="Delimiter">.</span>start = <a href='012elf.cc.html#L136'>CODE_START</a> + i*SEGMENT_SIZE + p_offset<span class="Delimiter">;</span> -<span id="L97" class="LineNr"> 97 </span> <a href='003trace.cc.html#L204'>trace</a><span class="Delimiter">(</span><span class="Constant">99</span><span class="Delimiter">,</span> <span class="Constant">"transform"</span><span class="Delimiter">)</span> << <span class="Constant">"segment "</span> << i << <span class="Constant">" begins at address 0x"</span> << <a href='010---vm.cc.html#L368'>HEXWORD</a> << curr<span class="Delimiter">.</span>start << end<span class="Delimiter">();</span> +<span id="L96" class="LineNr"> 96 </span> curr<span class="Delimiter">.</span>start = <a href='012elf.cc.html#L135'>CODE_SEGMENT</a> + i*SPACE_FOR_SEGMENT + p_offset<span class="Delimiter">;</span> +<span id="L97" class="LineNr"> 97 </span> <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">99</span><span class="Delimiter">,</span> <span class="Constant">"transform"</span><span class="Delimiter">)</span> << <span class="Constant">"segment "</span> << i << <span class="Constant">" begins at address 0x"</span> << <a href='010---vm.cc.html#L403'>HEXWORD</a> << curr<span class="Delimiter">.</span>start << end<span class="Delimiter">();</span> <span id="L98" class="LineNr"> 98 </span> <span class="Delimiter">}</span> <span id="L99" class="LineNr"> 99 </span> p_offset += <a href='034compute_segment_address.cc.html#L104'>size_of</a><span class="Delimiter">(</span>curr<span class="Delimiter">);</span> -<span id="L100" class="LineNr">100 </span> assert<span class="Delimiter">(</span>p_offset < <a href='012elf.cc.html#L135'>SEGMENT_SIZE</a><span class="Delimiter">);</span> <span class="Comment">// for now we get less and less available space in each successive segment</span> +<span id="L100" class="LineNr">100 </span> assert<span class="Delimiter">(</span>p_offset < <a href='010---vm.cc.html#L115'>INITIAL_SEGMENT_SIZE</a><span class="Delimiter">);</span> <span class="Comment">// for now we get less and less available space in each successive segment</span> <span id="L101" class="LineNr">101 </span> <span class="Delimiter">}</span> <span id="L102" class="LineNr">102 </span><span class="Delimiter">}</span> <span id="L103" class="LineNr">103 </span> |