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| author | Kartik Agaram <vc@akkartik.com> | 2018-11-30 09:43:49 -0800 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2018-11-30 09:43:49 -0800 |
| commit | c56d803cd8a0e3f28328f91aa1d457905a68641a (patch) | |
| tree | dd527a54c1ed8b45d5db44960f579c6faaf9ebd8 /html/subx/examples/ex7.subx.html | |
| parent | f989d6ccf9884e911db25494983da476f3c511b1 (diff) | |
| download | mu-c56d803cd8a0e3f28328f91aa1d457905a68641a.tar.gz | |
4796
Diffstat (limited to 'html/subx/examples/ex7.subx.html')
| -rw-r--r-- | html/subx/examples/ex7.subx.html | 92 |
1 files changed, 45 insertions, 47 deletions
diff --git a/html/subx/examples/ex7.subx.html b/html/subx/examples/ex7.subx.html index c41eccbf..fc0a4928 100644 --- a/html/subx/examples/ex7.subx.html +++ b/html/subx/examples/ex7.subx.html @@ -15,12 +15,10 @@ body { font-size: 12pt; font-family: monospace; color: #aaaaaa; background-color a { color:#eeeeee; text-decoration: none; } a:hover { text-decoration: underline; } * { font-size: 12pt; font-size: 1em; } +.subxComment { color: #005fff; } .LineNr { color: #444444; } -.Delimiter { color: #800080; } +.CommentedCode { color: #6c6c6c; } .Special { color: #c00000; } -.Comment { color: #9090ff; } -.Comment a { color:#0000ee; text-decoration:underline; } -.SalientComment { color: #00ffff; } --> </style> @@ -55,95 +53,95 @@ if ('onhashchange' in window) { </head> <body onload='JumpToLine();'> <pre id='vimCodeElement'> -<span id="L1" class="LineNr"> 1 </span><span class="SalientComment">## example showing file syscalls</span> -<span id="L2" class="LineNr"> 2 </span><span class="Comment"># Create a file, open it for writing, write a character to it, close it, open</span> -<span id="L3" class="LineNr"> 3 </span><span class="Comment"># it for reading, read a character from it, close it, delete it, and return</span> -<span id="L4" class="LineNr"> 4 </span><span class="Comment"># the character read.</span> -<span id="L5" class="LineNr"> 5 </span><span class="Comment">#</span> -<span id="L6" class="LineNr"> 6 </span><span class="Comment"># To run (from the subx directory):</span> -<span id="L7" class="LineNr"> 7 </span><span class="Comment"># $ subx translate examples/ex7.subx -o examples/ex7</span> -<span id="L8" class="LineNr"> 8 </span><span class="Comment"># $ subx run examples/ex7</span> -<span id="L9" class="LineNr"> 9 </span><span class="Comment"># Expected result:</span> -<span id="L10" class="LineNr"> 10 </span><span class="Comment"># $ echo $?</span> -<span id="L11" class="LineNr"> 11 </span><span class="Comment"># 97</span> +<span id="L1" class="LineNr"> 1 </span><span class="subxComment">## example showing file syscalls</span> +<span id="L2" class="LineNr"> 2 </span><span class="subxComment"># Create a file, open it for writing, write a character to it, close it, open</span> +<span id="L3" class="LineNr"> 3 </span><span class="subxComment"># it for reading, read a character from it, close it, delete it, and return</span> +<span id="L4" class="LineNr"> 4 </span><span class="subxComment"># the character read.</span> +<span id="L5" class="LineNr"> 5 </span><span class="subxComment">#</span> +<span id="L6" class="LineNr"> 6 </span><span class="subxComment"># To run (from the subx directory):</span> +<span id="L7" class="LineNr"> 7 </span><span class="subxComment"># $ subx translate examples/ex7.subx -o examples/ex7</span> +<span id="L8" class="LineNr"> 8 </span><span class="subxComment"># $ subx run examples/ex7</span> +<span id="L9" class="LineNr"> 9 </span><span class="subxComment"># Expected result:</span> +<span id="L10" class="LineNr"> 10 </span><span class="subxComment"># $ echo $?</span> +<span id="L11" class="LineNr"> 11 </span><span class="subxComment"># 97</span> <span id="L12" class="LineNr"> 12 </span> <span id="L13" class="LineNr"> 13 </span>== code -<span id="L14" class="LineNr"> 14 </span><span class="Comment"># instruction effective address operand displacement immediate</span> -<span id="L15" class="LineNr"> 15 </span><span class="Comment"># op subop mod rm32 base index scale r32</span> -<span id="L16" class="LineNr"> 16 </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="L14" class="LineNr"> 14 </span><span class="subxComment"># instruction effective address operand displacement immediate</span> +<span id="L15" class="LineNr"> 15 </span><span class="subxComment"># op subop mod rm32 base index scale r32</span> +<span id="L16" class="LineNr"> 16 </span><span class="subxComment"># 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="L17" class="LineNr"> 17 </span> -<span id="L18" class="LineNr"> 18 </span> <span class="Comment"># syscall(creat, Filename)</span> +<span id="L18" class="LineNr"> 18 </span> <span class="subxComment"># syscall(creat, Filename)</span> <span id="L19" class="LineNr"> 19 </span> bb/copy-to-EBX <span class="Special">Filename</span>/imm32 <span id="L20" class="LineNr"> 20 </span> b9/copy-to-ECX 0x180/imm32/fixed-perms <span id="L21" class="LineNr"> 21 </span> b8/copy-to-EAX 8/imm32/creat <span id="L22" class="LineNr"> 22 </span> cd/syscall 0x80/imm8 <span id="L23" class="LineNr"> 23 </span> -<span id="L24" class="LineNr"> 24 </span> <span class="Comment"># stream = syscall(open, Filename, O_WRONLY, 0) # we can't use 'fd' because it looks like a hex byte</span> +<span id="L24" class="LineNr"> 24 </span> <span class="subxComment"># stream = syscall(open, Filename, O_WRONLY, 0) # we can't use 'fd' because it looks like a hex byte</span> <span id="L25" class="LineNr"> 25 </span> bb/copy-to-EBX <span class="Special">Filename</span>/imm32 <span id="L26" class="LineNr"> 26 </span> b9/copy-to-ECX 1/imm32/wronly <span id="L27" class="LineNr"> 27 </span> ba/copy-to-EDX 0x180/imm32/fixed-perms <span id="L28" class="LineNr"> 28 </span> b8/copy-to-EAX 5/imm32/open <span id="L29" class="LineNr"> 29 </span> cd/syscall 0x80/imm8 -<span id="L30" class="LineNr"> 30 </span> <span class="Comment"># save stream</span> +<span id="L30" class="LineNr"> 30 </span> <span class="subxComment"># save stream</span> <span id="L31" class="LineNr"> 31 </span> bb/copy-to-EBX <span class="Special">Stream</span>/imm32 -<span id="L32" class="LineNr"> 32 </span> 89/copy 0/mod/indirect 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="L32" class="LineNr"> 32 </span> 89/copy 0/mod/indirect 3/rm32/EBX <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 0/r32/EAX <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="subxComment"># copy EAX to *EBX</span> <span id="L33" class="LineNr"> 33 </span> -<span id="L34" class="LineNr"> 34 </span> <span class="Comment"># syscall(write, Stream, "a", 1)</span> -<span id="L35" class="LineNr"> 35 </span> <span class="Comment"># load stream</span> +<span id="L34" class="LineNr"> 34 </span> <span class="subxComment"># syscall(write, Stream, "a", 1)</span> +<span id="L35" class="LineNr"> 35 </span> <span class="subxComment"># load stream</span> <span id="L36" class="LineNr"> 36 </span> bb/copy-to-EBX <span class="Special">Stream</span>/imm32 -<span id="L37" class="LineNr"> 37 </span> 8b/copy 0/mod/indirect 3/rm32/EBX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 3/r32/EBX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy *EBX to EBX</span> -<span id="L38" class="LineNr"> 38 </span> <span class="Comment">#</span> +<span id="L37" class="LineNr"> 37 </span> 8b/copy 0/mod/indirect 3/rm32/EBX <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 3/r32/EBX <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="subxComment"># copy *EBX to EBX</span> +<span id="L38" class="LineNr"> 38 </span> <span class="subxComment">#</span> <span id="L39" class="LineNr"> 39 </span> b9/copy-to-ECX <span class="Special">A</span>/imm32 <span id="L40" class="LineNr"> 40 </span> ba/copy-to-EDX 1/imm32/size <span id="L41" class="LineNr"> 41 </span> b8/copy-to-EAX 4/imm32/write <span id="L42" class="LineNr"> 42 </span> cd/syscall 0x80/imm8 <span id="L43" class="LineNr"> 43 </span> -<span id="L44" class="LineNr"> 44 </span> <span class="Comment"># syscall(close, Stream)</span> -<span id="L45" class="LineNr"> 45 </span> <span class="Comment"># load stream</span> +<span id="L44" class="LineNr"> 44 </span> <span class="subxComment"># syscall(close, Stream)</span> +<span id="L45" class="LineNr"> 45 </span> <span class="subxComment"># load stream</span> <span id="L46" class="LineNr"> 46 </span> bb/copy-to-EBX <span class="Special">Stream</span>/imm32 -<span id="L47" class="LineNr"> 47 </span> 8b/copy 0/mod/indirect 3/rm32/EBX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 3/r32/EBX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy *EBX to EBX</span> -<span id="L48" class="LineNr"> 48 </span> <span class="Comment">#</span> +<span id="L47" class="LineNr"> 47 </span> 8b/copy 0/mod/indirect 3/rm32/EBX <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 3/r32/EBX <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="subxComment"># copy *EBX to EBX</span> +<span id="L48" class="LineNr"> 48 </span> <span class="subxComment">#</span> <span id="L49" class="LineNr"> 49 </span> b8/copy-to-EAX 6/imm32/close <span id="L50" class="LineNr"> 50 </span> cd/syscall 0x80/imm8 <span id="L51" class="LineNr"> 51 </span> -<span id="L52" class="LineNr"> 52 </span> <span class="Comment"># stream = syscall(open, Filename, O_RDONLY, 0)</span> +<span id="L52" class="LineNr"> 52 </span> <span class="subxComment"># stream = syscall(open, Filename, O_RDONLY, 0)</span> <span id="L53" class="LineNr"> 53 </span> bb/copy-to-EBX <span class="Special">Filename</span>/imm32 <span id="L54" class="LineNr"> 54 </span> b9/copy-to-ECX 0/imm32/rdonly <span id="L55" class="LineNr"> 55 </span> ba/copy-to-EDX 0x180/imm32/fixed-perms <span id="L56" class="LineNr"> 56 </span> b8/copy-to-EAX 5/imm32/open <span id="L57" class="LineNr"> 57 </span> cd/syscall 0x80/imm8 -<span id="L58" class="LineNr"> 58 </span> <span class="Comment"># save Stream</span> +<span id="L58" class="LineNr"> 58 </span> <span class="subxComment"># save Stream</span> <span id="L59" class="LineNr"> 59 </span> bb/copy-to-EBX <span class="Special">Stream</span>/imm32 -<span id="L60" class="LineNr"> 60 </span> 89/copy 0/mod/indirect 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="L60" class="LineNr"> 60 </span> 89/copy 0/mod/indirect 3/rm32/EBX <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 0/r32/EAX <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="subxComment"># copy EAX to *EBX</span> <span id="L61" class="LineNr"> 61 </span> -<span id="L62" class="LineNr"> 62 </span> <span class="Comment"># syscall(read, Stream, B, 1)</span> -<span id="L63" class="LineNr"> 63 </span> <span class="Comment"># load stream</span> +<span id="L62" class="LineNr"> 62 </span> <span class="subxComment"># syscall(read, Stream, B, 1)</span> +<span id="L63" class="LineNr"> 63 </span> <span class="subxComment"># load stream</span> <span id="L64" class="LineNr"> 64 </span> bb/copy-to-EBX <span class="Special">Stream</span>/imm32 -<span id="L65" class="LineNr"> 65 </span> 8b/copy 0/mod/indirect 3/rm32/EBX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 3/r32/EBX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy *EBX to EBX</span> -<span id="L66" class="LineNr"> 66 </span> <span class="Comment">#</span> +<span id="L65" class="LineNr"> 65 </span> 8b/copy 0/mod/indirect 3/rm32/EBX <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 3/r32/EBX <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="subxComment"># copy *EBX to EBX</span> +<span id="L66" class="LineNr"> 66 </span> <span class="subxComment">#</span> <span id="L67" class="LineNr"> 67 </span> b9/copy-to-ECX <span class="Special">B</span>/imm32 <span id="L68" class="LineNr"> 68 </span> ba/copy-to-EDX 1/imm32/size <span id="L69" class="LineNr"> 69 </span> b8/copy-to-EAX 3/imm32/read <span id="L70" class="LineNr"> 70 </span> cd/syscall 0x80/imm8 <span id="L71" class="LineNr"> 71 </span> -<span id="L72" class="LineNr"> 72 </span> <span class="Comment"># syscall(close, Stream)</span> -<span id="L73" class="LineNr"> 73 </span> <span class="Comment"># load stream</span> +<span id="L72" class="LineNr"> 72 </span> <span class="subxComment"># syscall(close, Stream)</span> +<span id="L73" class="LineNr"> 73 </span> <span class="subxComment"># load stream</span> <span id="L74" class="LineNr"> 74 </span> bb/copy-to-EBX <span class="Special">Stream</span>/imm32 -<span id="L75" class="LineNr"> 75 </span> 8b/copy 0/mod/indirect 3/rm32/EBX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 3/r32/EBX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy *EBX to EBX</span> -<span id="L76" class="LineNr"> 76 </span> <span class="Comment">#</span> +<span id="L75" class="LineNr"> 75 </span> 8b/copy 0/mod/indirect 3/rm32/EBX <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 3/r32/EBX <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="subxComment"># copy *EBX to EBX</span> +<span id="L76" class="LineNr"> 76 </span> <span class="subxComment">#</span> <span id="L77" class="LineNr"> 77 </span> b8/copy-to-EAX 6/imm32/close <span id="L78" class="LineNr"> 78 </span> cd/syscall 0x80/imm8 <span id="L79" class="LineNr"> 79 </span> -<span id="L80" class="LineNr"> 80 </span> <span class="Comment"># syscall(unlink, filename)</span> +<span id="L80" class="LineNr"> 80 </span> <span class="subxComment"># syscall(unlink, filename)</span> <span id="L81" class="LineNr"> 81 </span> bb/copy-to-EBX <span class="Special">Filename</span>/imm32 <span id="L82" class="LineNr"> 82 </span> b8/copy-to-EAX 0xa/imm32/unlink <span id="L83" class="LineNr"> 83 </span> cd/syscall 0x80/imm8 <span id="L84" class="LineNr"> 84 </span> -<span id="L85" class="LineNr"> 85 </span> <span class="Comment"># syscall(exit, b)</span> -<span id="L86" class="LineNr"> 86 </span> <span class="Comment"># load b</span> +<span id="L85" class="LineNr"> 85 </span> <span class="subxComment"># syscall(exit, b)</span> +<span id="L86" class="LineNr"> 86 </span> <span class="subxComment"># load b</span> <span id="L87" class="LineNr"> 87 </span> bb/copy-to-EBX <span class="Special">B</span>/imm32 -<span id="L88" class="LineNr"> 88 </span> 8b/copy 0/mod/indirect 3/rm32/EBX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 3/r32/EBX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy *EBX to EBX</span> -<span id="L89" class="LineNr"> 89 </span> <span class="Comment">#</span> +<span id="L88" class="LineNr"> 88 </span> 8b/copy 0/mod/indirect 3/rm32/EBX <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 3/r32/EBX <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="subxComment"># copy *EBX to EBX</span> +<span id="L89" class="LineNr"> 89 </span> <span class="subxComment">#</span> <span id="L90" class="LineNr"> 90 </span> b8/copy-to-EAX 1/imm32/exit <span id="L91" class="LineNr"> 91 </span> cd/syscall 0x80/imm8 <span id="L92" class="LineNr"> 92 </span> @@ -158,7 +156,7 @@ if ('onhashchange' in window) { <span id="L101" class="LineNr">101 </span><span class="Special">Filename</span>: <span id="L102" class="LineNr">102 </span> 2e 66 6f 6f 00 00 00 00 <span id="L103" class="LineNr">103 </span> -<span id="L104" class="LineNr">104 </span><span class="Comment"># vim:nowrap:textwidth=0</span> +<span id="L104" class="LineNr">104 </span><span class="subxComment"># vim:nowrap:textwidth=0</span> </pre> </body> </html> |