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Diffstat (limited to 'html/subx/053new_segment.subx.html')
| -rw-r--r-- | html/subx/053new_segment.subx.html | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/html/subx/053new_segment.subx.html b/html/subx/053new_segment.subx.html new file mode 100644 index 00000000..49724d37 --- /dev/null +++ b/html/subx/053new_segment.subx.html @@ -0,0 +1,121 @@ +<!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/053new_segment.subx</title> +<meta name="Generator" content="Vim/8.0"> +<meta name="plugin-version" content="vim7.4_v2"> +<meta name="syntax" content="none"> +<meta name="settings" content="number_lines,use_css,no_foldcolumn,expand_tabs,line_ids,prevent_copy="> +<meta name="colorscheme" content="minimal"> +<style type="text/css"> +<!-- +pre { font-family: monospace; color: #aaaaaa; background-color: #080808; } +body { font-size: 12pt; font-family: monospace; color: #aaaaaa; background-color: #080808; } +a { color:#eeeeee; text-decoration: none; } +a:hover { text-decoration: underline; } +* { font-size: 12pt; font-size: 1em; } +.LineNr { color: #444444; } +.Delimiter { color: #800080; } +.Comment { color: #9090ff; } +.Comment a { color:#0000ee; text-decoration:underline; } +--> +</style> + +<script type='text/javascript'> +<!-- + +/* function to open any folds containing a jumped-to line before jumping to it */ +function JumpToLine() +{ + var lineNum; + lineNum = window.location.hash; + lineNum = lineNum.substr(1); /* strip off '#' */ + + if (lineNum.indexOf('L') == -1) { + lineNum = 'L'+lineNum; + } + lineElem = document.getElementById(lineNum); + /* Always jump to new location even if the line was hidden inside a fold, or + * we corrected the raw number to a line ID. + */ + if (lineElem) { + lineElem.scrollIntoView(true); + } + 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"># Create a new segment (for data) using mmap().</span> +<span id="L2" class="LineNr"> 2 </span> +<span id="L3" class="LineNr"> 3 </span>== code +<span id="L4" class="LineNr"> 4 </span> +<span id="L5" class="LineNr"> 5 </span><span class="Comment"># instruction effective address operand displacement immediate</span> +<span id="L6" class="LineNr"> 6 </span><span class="Comment"># op subop mod rm32 base index scale r32</span> +<span id="L7" class="LineNr"> 7 </span><span class="Comment"># 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes</span> +<span id="L8" class="LineNr"> 8 </span> +<span id="L9" class="LineNr"> 9 </span><span class="Comment"># main: (manual test if this is the last file loaded)</span> +<span id="L10" class="LineNr">10 </span> <span class="Comment"># EAX = new_segment(0x1000)</span> +<span id="L11" class="LineNr">11 </span> <span class="Comment"># push arg</span> +<span id="L12" class="LineNr">12 </span> 68/push 0x1000/imm32 +<span id="L13" class="LineNr">13 </span> <span class="Comment"># call</span> +<span id="L14" class="LineNr">14 </span> e8/call new_segment/disp32 +<span id="L15" class="LineNr">15 </span> <span class="Comment"># discard arg</span> +<span id="L16" class="LineNr">16 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 4/imm32 <span class="Comment"># add to ESP</span> +<span id="L17" class="LineNr">17 </span> +<span id="L18" class="LineNr">18 </span> <span class="Comment"># store to *EAX</span> +<span id="L19" class="LineNr">19 </span> c7/copy 0/mod/direct 0/rm32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0x34/imm32 <span class="Comment"># copy to *EAX</span> +<span id="L20" class="LineNr">20 </span> +<span id="L21" class="LineNr">21 </span> <span class="Comment"># exit(EAX)</span> +<span id="L22" class="LineNr">22 </span> 89/copy 3/mod/direct 3/rm32/EBX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0/r32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy EAX to EBX</span> +<span id="L23" class="LineNr">23 </span> b8/copy <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 1/imm32/exit <span class="Comment"># copy to EAX</span> +<span id="L24" class="LineNr">24 </span> cd/syscall 0x80/imm8 +<span id="L25" class="LineNr">25 </span> +<span id="L26" class="LineNr">26 </span>new_segment: <span class="Comment"># len : int -> address</span> +<span id="L27" class="LineNr">27 </span> <span class="Comment"># prolog</span> +<span id="L28" class="LineNr">28 </span> 55/push-EBP +<span id="L29" class="LineNr">29 </span> 89/copy 3/mod/direct 5/rm32/EBP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 4/r32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy ESP to EBP</span> +<span id="L30" class="LineNr">30 </span> 53/push-EBX +<span id="L31" class="LineNr">31 </span> <span class="Comment"># copy len to mmap_new_segment.len</span> +<span id="L32" class="LineNr">32 </span> <span class="Comment"># TODO: compute mmap_new_segment+4 before runtime</span> +<span id="L33" class="LineNr">33 </span> 8b/copy 1/mod/*+disp8 4/rm32/SIB 5/base/EBP 4/index/none <span class="Delimiter"> . </span> 0/r32/EAX 8/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy *(EBP+8) to EAX</span> +<span id="L34" class="LineNr">34 </span> bb/copy <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> mmap_new_segment/imm32 <span class="Comment"># copy to EBX</span> +<span id="L35" class="LineNr">35 </span> 89/copy 1/mod/*+disp8 3/rm32/EBX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0/r32/EAX 4/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy EAX to *(EBX+4)</span> +<span id="L36" class="LineNr">36 </span> <span class="Comment"># mmap(mmap_new_segment)</span> +<span id="L37" class="LineNr">37 </span> bb/copy <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> mmap_new_segment/imm32 <span class="Comment"># copy to EBX</span> +<span id="L38" class="LineNr">38 </span> b8/copy <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0x5a/imm32/mmap <span class="Comment"># copy to EAX</span> +<span id="L39" class="LineNr">39 </span> cd/syscall 0x80/imm8 +<span id="L40" class="LineNr">40 </span> <span class="Comment"># epilog</span> +<span id="L41" class="LineNr">41 </span> 5b/pop-to-EBX +<span id="L42" class="LineNr">42 </span> 89/copy 3/mod/direct 4/rm32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 5/r32/EBP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy EBP to ESP</span> +<span id="L43" class="LineNr">43 </span> 5d/pop-to-EBP +<span id="L44" class="LineNr">44 </span> c3/return +<span id="L45" class="LineNr">45 </span> +<span id="L46" class="LineNr">46 </span>== data +<span id="L47" class="LineNr">47 </span><span class="Comment"># various constants used here were found in the Linux sources (search for file mman-common.h)</span> +<span id="L48" class="LineNr">48 </span>mmap_new_segment: <span class="Comment"># type mmap_arg_struct</span> +<span id="L49" class="LineNr">49 </span> <span class="Comment"># addr</span> +<span id="L50" class="LineNr">50 </span> 00 00 00 00 <span class="Comment"># null</span> +<span id="L51" class="LineNr">51 </span> <span class="Comment"># len</span> +<span id="L52" class="LineNr">52 </span> 00 00 00 00 <span class="Comment"># 0x1000</span> +<span id="L53" class="LineNr">53 </span> <span class="Comment"># protection flags</span> +<span id="L54" class="LineNr">54 </span> 03 00 00 00 <span class="Comment"># PROT_READ | PROT_WRITE</span> +<span id="L55" class="LineNr">55 </span> <span class="Comment"># sharing flags</span> +<span id="L56" class="LineNr">56 </span> 22 00 00 00 <span class="Comment"># MAP_PRIVATE | MAP_ANONYMOUS</span> +<span id="L57" class="LineNr">57 </span> <span class="Comment"># fd</span> +<span id="L58" class="LineNr">58 </span> ff ff ff ff <span class="Comment"># -1 since MAP_ANONYMOUS is specified</span> +<span id="L59" class="LineNr">59 </span> <span class="Comment"># offset</span> +<span id="L60" class="LineNr">60 </span> 00 00 00 00 <span class="Comment"># 0 since MAP_ANONYMOUS is specified</span> +<span id="L61" class="LineNr">61 </span> +<span id="L62" class="LineNr">62 </span><span class="Comment"># vim:ft=subx:nowrap:tw&</span> +</pre> +</body> +</html> +<!-- vim: set foldmethod=manual : --> |