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Diffstat (limited to 'html/mu-init.subx.html')
| -rw-r--r-- | html/mu-init.subx.html | 86 |
1 files changed, 26 insertions, 60 deletions
diff --git a/html/mu-init.subx.html b/html/mu-init.subx.html index 8c27bb46..7e26b982 100644 --- a/html/mu-init.subx.html +++ b/html/mu-init.subx.html @@ -18,7 +18,6 @@ a { color:inherit; } .LineNr { } .SpecialChar { color: #d70000; } .Constant { color: #008787; } -.subxH1Comment { color: #005faf; text-decoration: underline; } --> </style> @@ -56,66 +55,33 @@ if ('onhashchange' in window) { <pre id='vimCodeElement'> <span id="L1" class="LineNr"> 1 </span><span class="subxComment"># Initialize the minimal runtime for Mu programs.</span> <span id="L2" class="LineNr"> 2 </span><span class="subxComment">#</span> -<span id="L3" class="LineNr"> 3 </span><span class="subxComment"># See translate_mu for how this file is used.</span> +<span id="L3" class="LineNr"> 3 </span><span class="subxComment"># See translate for how this file is used.</span> <span id="L4" class="LineNr"> 4 </span><span class="subxComment">#</span> -<span id="L5" class="LineNr"> 5 </span><span class="subxComment"># Mu programs start at a function called 'main' with this signature:</span> -<span id="L6" class="LineNr"> 6 </span><span class="subxComment"># fn main args: (addr array addr array byte) -> _/ebx: int</span> -<span id="L7" class="LineNr"> 7 </span><span class="subxComment"># If your program doesn't need commandline arguments you can drop it:</span> -<span id="L8" class="LineNr"> 8 </span><span class="subxComment"># fn main -> _/ebx: int</span> -<span id="L9" class="LineNr"> 9 </span><span class="subxComment">#</span> -<span id="L10" class="LineNr">10 </span><span class="subxComment"># Notice that the output must be in ebx, so that the exit() syscall can pick</span> -<span id="L11" class="LineNr">11 </span><span class="subxComment"># it up.</span> -<span id="L12" class="LineNr">12 </span> -<span id="L13" class="LineNr">13 </span>== code -<span id="L14" class="LineNr">14 </span> -<span id="L15" class="LineNr">15 </span><span class="SpecialChar">Entry</span>: -<span id="L16" class="LineNr">16 </span> <span class="subxComment"># we don't use ebp in Entry; just initialize it</span> -<span id="L17" class="LineNr">17 </span> bd/copy-to-ebp 0/imm32 -<span id="L18" class="LineNr">18 </span> <span class="subxH1Comment"># - save argc and argv</span> -<span id="L19" class="LineNr">19 </span> <span class="subxComment"># var argc-and-argv/esi</span> -<span id="L20" class="LineNr">20 </span> 89/<- %esi 4/r32/esp -<span id="L21" class="LineNr">21 </span><span class="Constant">$Entry:initialize-heap</span>: -<span id="L22" class="LineNr">22 </span> <span class="subxH1Comment"># - initialize the heap</span> -<span id="L23" class="LineNr">23 </span> (<a href='104new-segment.subx.html#L40'>new-segment</a> *<span class="SpecialChar"><a href='120allocate.subx.html#L34'>Heap-size</a></span> <span class="SpecialChar"><a href='120allocate.subx.html#L27'>Heap</a></span>) -<span id="L24" class="LineNr">24 </span><span class="Constant">$Entry:initialize-args</span>: -<span id="L25" class="LineNr">25 </span> <span class="subxH1Comment"># - convert argv from null-terminated 'kernel' strings to length-prefixed Mu strings</span> -<span id="L26" class="LineNr">26 </span> <span class="subxComment"># var argc/edx: int</span> -<span id="L27" class="LineNr">27 </span> 8b/-> *esi 2/r32/edx -<span id="L28" class="LineNr">28 </span> <span class="subxComment"># argc is in words; convert it to bytes</span> -<span id="L29" class="LineNr">29 </span> c1/shift 4/subop/left %edx 2/imm8 -<span id="L30" class="LineNr">30 </span> <span class="subxComment"># var tmp/ebx: handle</span> -<span id="L31" class="LineNr">31 </span> 68/push 0/imm32 -<span id="L32" class="LineNr">32 </span> 68/push 0/imm32 -<span id="L33" class="LineNr">33 </span> 89/<- %ebx 4/r32/esp -<span id="L34" class="LineNr">34 </span> <span class="subxComment"># var args/edi: (addr array (addr array byte))</span> -<span id="L35" class="LineNr">35 </span> (<a href='120allocate.subx.html#L576'>allocate-array</a> <span class="SpecialChar"><a href='120allocate.subx.html#L27'>Heap</a></span> %edx %ebx) -<span id="L36" class="LineNr">36 </span> (<a href='120allocate.subx.html#L256'>lookup</a> *ebx *(ebx+4)) <span class="subxComment"># => eax</span> -<span id="L37" class="LineNr">37 </span> 89/<- %edi 0/r32/eax -<span id="L38" class="LineNr">38 </span> <span class="subxComment"># var curr/ecx: (addr kernel-string) = argv</span> -<span id="L39" class="LineNr">39 </span> 8d/copy-address *(esi+4) 1/r32/ecx -<span id="L40" class="LineNr">40 </span> <span class="subxComment"># var max/edx: (addr kernel-string) = argv+4+argc</span> -<span id="L41" class="LineNr">41 </span> 8d/copy-address *(ecx+edx) 2/r32/edx -<span id="L42" class="LineNr">42 </span> <span class="subxComment"># var dest/esi: (addr (addr array byte)) = args+4</span> -<span id="L43" class="LineNr">43 </span> 8d/copy-address *(edi+4) 6/r32/esi -<span id="L44" class="LineNr">44 </span> { -<span id="L45" class="LineNr">45 </span> <span class="subxComment"># if (curr >= max) break</span> -<span id="L46" class="LineNr">46 </span> 39/compare %ecx 2/r32/edx -<span id="L47" class="LineNr">47 </span> 73/jump-if-addr>= <span class="Constant">break</span>/disp8 -<span id="L48" class="LineNr">48 </span> <span class="subxComment"># *dest = kernel-string-to-string(*curr)</span> -<span id="L49" class="LineNr">49 </span> (<a href='303kernel-string.subx.html#L7'>kernel-string-to-string</a> <span class="SpecialChar"><a href='120allocate.subx.html#L27'>Heap</a></span> *ecx %ebx) -<span id="L50" class="LineNr">50 </span> (<a href='120allocate.subx.html#L256'>lookup</a> *ebx *(ebx+4)) <span class="subxComment"># => eax</span> -<span id="L51" class="LineNr">51 </span> 89/<- *esi 0/r32/eax -<span id="L52" class="LineNr">52 </span> <span class="subxComment"># curr += 4</span> -<span id="L53" class="LineNr">53 </span> 81 0/subop/add %ecx 4/imm32 -<span id="L54" class="LineNr">54 </span> <span class="subxComment"># dest += 4</span> -<span id="L55" class="LineNr">55 </span> 81 0/subop/add %esi 4/imm32 -<span id="L56" class="LineNr">56 </span> <span class="subxComment">#</span> -<span id="L57" class="LineNr">57 </span> eb/jump <span class="Constant">loop</span>/disp8 -<span id="L58" class="LineNr">58 </span> } -<span id="L59" class="LineNr">59 </span> <span class="subxH1Comment"># - run Mu program</span> -<span id="L60" class="LineNr">60 </span> (main %edi) <span class="subxComment"># => ebx</span> -<span id="L61" class="LineNr">61 </span> <span class="subxH1Comment"># - exit</span> -<span id="L62" class="LineNr">62 </span> (syscall_exit) +<span id="L5" class="LineNr"> 5 </span><span class="subxComment"># Mu programs start at a function called 'main' without inouts or outputs.</span> +<span id="L6" class="LineNr"> 6 </span><span class="subxComment"># All tests must pass first (the "power-on unit test").</span> +<span id="L7" class="LineNr"> 7 </span> +<span id="L8" class="LineNr"> 8 </span>== code +<span id="L9" class="LineNr"> 9 </span> +<span id="L10" class="LineNr">10 </span><span class="SpecialChar">Entry</span>: +<span id="L11" class="LineNr">11 </span> <span class="subxComment"># initialize stack</span> +<span id="L12" class="LineNr">12 </span> bd/copy-to-ebp 0/imm32 +<span id="L13" class="LineNr">13 </span> <span class="subxComment"># always first run tests</span> +<span id="L14" class="LineNr">14 </span> (run-tests) +<span id="L15" class="LineNr">15 </span> (<a href='104test.subx.html#L17'>num-test-failures</a>) <span class="subxComment"># => eax</span> +<span id="L16" class="LineNr">16 </span> <span class="subxComment"># call main if tests all passed</span> +<span id="L17" class="LineNr">17 </span> { +<span id="L18" class="LineNr">18 </span> 3d/compare-eax-and 0/imm32 +<span id="L19" class="LineNr">19 </span> 75/jump-if-!= <span class="Constant">break</span>/disp8 +<span id="L20" class="LineNr">20 </span> (<a href='500text-screen.mu.html#L226'>clear-real-screen</a>) +<span id="L21" class="LineNr">21 </span> c7 0/subop/copy *<span class="SpecialChar"><a href='103grapheme.subx.html#L170'>Real-screen-cursor-x</a></span> 0/imm32 +<span id="L22" class="LineNr">22 </span> c7 0/subop/copy *<span class="SpecialChar"><a href='103grapheme.subx.html#L172'>Real-screen-cursor-y</a></span> 0/imm32 +<span id="L23" class="LineNr">23 </span> (main) +<span id="L24" class="LineNr">24 </span> } +<span id="L25" class="LineNr">25 </span> +<span id="L26" class="LineNr">26 </span> <span class="subxComment"># hang indefinitely</span> +<span id="L27" class="LineNr">27 </span> { +<span id="L28" class="LineNr">28 </span> eb/jump <span class="Constant">loop</span>/disp8 +<span id="L29" class="LineNr">29 </span> } </pre> </body> </html> |