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<a class="el" href="dir_897b6a2d7bab147dd1db58381aad3984.html">src</a> » <a class="el" href="dir_832905b1f7f5feaf61a306b40c0ac817.html">sys</a> » <a class="el" href="dir_dffcdd1ad37a0b2305f9cf289deb8f95.html">init</a></div>
<h1>start.S</h1><a href="start_8S.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*****************************************************************************************</span>
<a name="l00002"></a>00002 <span class="comment"> Copyright (c) 2002-2004 The UbixOS Project</span>
<a name="l00003"></a>00003 <span class="comment"> All rights reserved.</span>
<a name="l00004"></a>00004 <span class="comment"></span>
<a name="l00005"></a>00005 <span class="comment"> Redistribution and use in source and binary forms, with or without modification, are</span>
<a name="l00006"></a>00006 <span class="comment"> permitted provided that the following conditions are met:</span>
<a name="l00007"></a>00007 <span class="comment"></span>
<a name="l00008"></a>00008 <span class="comment"> Redistributions of source code must retain the above copyright notice, this list of</span>
<a name="l00009"></a>00009 <span class="comment"> conditions, the following disclaimer and the list of authors. Redistributions in binary</span>
<a name="l00010"></a>00010 <span class="comment"> form must reproduce the above copyright notice, this list of conditions, the following</span>
<a name="l00011"></a>00011 <span class="comment"> disclaimer and the list of authors in the documentation and/or other materials provided</span>
<a name="l00012"></a>00012 <span class="comment"> with the distribution. Neither the name of the UbixOS Project nor the names of its</span>
<a name="l00013"></a>00013 <span class="comment"> contributors may be used to endorse or promote products derived from this software</span>
<a name="l00014"></a>00014 <span class="comment"> without specific prior written permission.</span>
<a name="l00015"></a>00015 <span class="comment"></span>
<a name="l00016"></a>00016 <span class="comment"> THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY</span>
<a name="l00017"></a>00017 <span class="comment"> EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF</span>
<a name="l00018"></a>00018 <span class="comment"> MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL</span>
<a name="l00019"></a>00019 <span class="comment"> THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,</span>
<a name="l00020"></a>00020 <span class="comment"> SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT</span>
<a name="l00021"></a>00021 <span class="comment"> OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)</span>
<a name="l00022"></a>00022 <span class="comment"> HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR</span>
<a name="l00023"></a>00023 <span class="comment"> TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS</span>
<a name="l00024"></a>00024 <span class="comment"> SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span>
<a name="l00025"></a>00025 <span class="comment"></span>
<a name="l00026"></a>00026 <span class="comment"> $Id: start_8S-source.html 88 2016-01-12 00:11:29Z reddawg $</span>
<a name="l00027"></a>00027 <span class="comment"></span>
<a name="l00028"></a>00028 <span class="comment">*****************************************************************************************/</span>
<a name="l00029"></a>00029
<a name="l00030"></a>00030 .globl <a class="code" href="start_8S.html#54202fcc33389bebd85b8846c6443316">_start</a>
<a name="l00031"></a>00031 .text
<a name="l00032"></a>00032 .code32
<a name="l00033"></a>00033 <a class="code" href="start_8S.html#54202fcc33389bebd85b8846c6443316">_start</a>:
<a name="l00034"></a><a class="code" href="start_8S.html#00530026cdfd3cedfaee7ac4ec46aa53">00034</a> movw $0x1234,0x472
<a name="l00035"></a>00035 pushl %ebp
<a name="l00036"></a>00036 <a class="code" href="timer_8S.html#e987d7c277439abad5828bb7b0291042">movl</a> %<a class="code" href="start_8S.html#00530026cdfd3cedfaee7ac4ec46aa53">esp</a>,%ebp
<a name="l00037"></a>00037 pushl $0x00000002
<a name="l00038"></a>00038 popfl
<a name="l00039"></a>00039 <span class="comment">/* Clear the BSS */</span>
<a name="l00040"></a>00040 <a class="code" href="timer_8S.html#e987d7c277439abad5828bb7b0291042">movl</a> $(_end),%ecx
<a name="l00041"></a>00041 <a class="code" href="timer_8S.html#e987d7c277439abad5828bb7b0291042">movl</a> $(__bss_start),%<a class="code" href="start_8S.html#f701de0cc799320aaf54092dda7b54d2">edi</a>
<a name="l00042"></a><a class="code" href="start_8S.html#f701de0cc799320aaf54092dda7b54d2">00042</a> subl %<a class="code" href="start_8S.html#f701de0cc799320aaf54092dda7b54d2">edi</a>,%ecx
<a name="l00043"></a>00043 xorl %<a class="code" href="start_8S.html#99c8741e5f964a3b896c5d21808dd942">eax</a>,%<a class="code" href="start_8S.html#99c8741e5f964a3b896c5d21808dd942">eax</a>
<a name="l00044"></a>00044 cld
<a name="l00045"></a>00045 rep
<a name="l00046"></a>00046 stosb
<a name="l00047"></a>00047
<a name="l00048"></a>00048 <span class="comment">/* Load GDT */</span>
<a name="l00049"></a>00049 <a class="code" href="start_8S.html#e156af68449fc98b19d9c86e6d5a54f8">lgdtl</a> (<a class="code" href="main_8c.html#ac0f90734a3334640d5e1a24e297fd9a">loadGDT</a>)
<a name="l00050"></a>00050 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> $0<a class="code" href="ap-boot_8S.html#7e98760dd541754f39aa9a0060176908">x10</a>,%<a class="code" href="start_8S.html#99c8741e5f964a3b896c5d21808dd942">eax</a>
<a name="l00051"></a><a class="code" href="start_8S.html#d95bd4ee2ca78187e68aa0746a24e64d">00051</a> <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> %<a class="code" href="start_8S.html#99c8741e5f964a3b896c5d21808dd942">eax</a>,%ds
<a name="l00052"></a>00052 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> %eax,%es
<a name="l00053"></a>00053 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> %eax,%<a class="code" href="structfs.html">fs</a>
<a name="l00054"></a>00054 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> %eax,%gs
<a name="l00055"></a>00055 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> %eax,%ss
<a name="l00056"></a>00056 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> <a class="code" href="start_8S.html#b2e5e08c6039d99c8bf03149d286e05b">$kStack</a>,%eax
<a name="l00057"></a>00057 <a class="code" href="sys__call__new_8S.html#bf8ddf6928259c0057aa3377e79b093e">addl</a> $0<a class="code" href="start_8S.html#d95bd4ee2ca78187e68aa0746a24e64d">x2000</a>,%eax
<a name="l00058"></a>00058 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> %<a class="code" href="start_8S.html#00530026cdfd3cedfaee7ac4ec46aa53">esp</a>,%<a class="code" href="timer_8S.html#15bdf6d1016b28a29ed53c35bcc6113b">edx</a>
<a name="l00059"></a>00059 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> %eax,%esp
<a name="l00060"></a>00060 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> %eax,%ebp
<a name="l00061"></a>00061 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> $0<a class="code" href="start_8S.html#0c48af311abb843beb7bb6c5e295d1db">x18</a>,%<a class="code" href="ap-boot_8S.html#fe6e6cf4fb15afcba9890a66d0b89ffd">ax</a>
<a name="l00062"></a>00062 lldt %<a class="code" href="ap-boot_8S.html#fe6e6cf4fb15afcba9890a66d0b89ffd">ax</a>
<a name="l00063"></a>00063 <a class="code" href="ap-boot_8S.html#ede772866220799485f4da9fc06e759d">mov</a> $0<a class="code" href="start_8S.html#62df326d54f8b2ece412319c4360ef3e">x20</a>,%<a class="code" href="ap-boot_8S.html#fe6e6cf4fb15afcba9890a66d0b89ffd">ax</a>
<a name="l00064"></a>00064 ltr %<a class="code" href="ap-boot_8S.html#fe6e6cf4fb15afcba9890a66d0b89ffd">ax</a>
<a name="l00065"></a>00065 ljmp $0<a class="code" href="start_8S.html#441ab5e5719c472d9d4a6c9ce910aa35">x08</a>,$start_next
<a name="l00066"></a>00066 <a class="code" href="start_8S.html#290ec7d8f899d042eb0e4bcb2d0d43c8">start_next</a>:
<a name="l00067"></a>00067 push 8(%<a class="code" href="timer_8S.html#15bdf6d1016b28a29ed53c35bcc6113b">edx</a>)
<a name="l00068"></a>00068 call <a class="code" href="main_8c.html#a099bb67b4698f94150184a0ee8ccffb">kmain</a>
<a name="l00069"></a>00069
<a name="l00070"></a>00070 .data
<a name="l00071"></a>00071 .comm kStack,0x2000
<a name="l00072"></a>00072
<a name="l00073"></a>00073 <span class="comment">/***</span>
<a name="l00074"></a>00074 <span class="comment"> END</span>
<a name="l00075"></a>00075 <span class="comment"> ***/</span>
</pre></div><hr size="1"><address style="align: right;"><small>Generated on Fri Dec 15 11:18:55 2006 for UbixOS V2 by
<a href="http://www.doxygen.org/index.html">
<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.7 </small></address>
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