<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=9"/>
<meta name="generator" content="Doxygen 1.8.16"/>
<meta name="viewport" content="width=device-width, initial-scale=1"/>
<title>UbixOS: arch/i386/sys_call.S Source File</title>
<link href="../../tabs.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="../../jquery.js"></script>
<script type="text/javascript" src="../../dynsections.js"></script>
<link href="../../navtree.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="../../resize.js"></script>
<script type="text/javascript" src="../../navtreedata.js"></script>
<script type="text/javascript" src="../../navtree.js"></script>
<script type="text/javascript">
/* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */
$(document).ready(initResizable);
/* @license-end */</script>
<link href="../../doxygen.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
<div id="titlearea">
<table cellspacing="0" cellpadding="0">
<tbody>
<tr style="height: 56px;">
<td id="projectalign" style="padding-left: 0.5em;">
<div id="projectname">UbixOS
 <span id="projectnumber">2.0</span>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<!-- end header part -->
<!-- Generated by Doxygen 1.8.16 -->
<script type="text/javascript" src="../../menudata.js"></script>
<script type="text/javascript" src="../../menu.js"></script>
<script type="text/javascript">
/* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */
$(function() {
initMenu('../../',false,false,'search.php','Search');
});
/* @license-end */</script>
<div id="main-nav"></div>
</div><!-- top -->
<div id="side-nav" class="ui-resizable side-nav-resizable">
<div id="nav-tree">
<div id="nav-tree-contents">
<div id="nav-sync" class="sync"></div>
</div>
</div>
<div id="splitbar" style="-moz-user-select:none;"
class="ui-resizable-handle">
</div>
</div>
<script type="text/javascript">
/* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */
$(document).ready(function(){initNavTree('d4/d81/i386_2sys__call_8S_source.html','../../');});
/* @license-end */
</script>
<div id="doc-content">
<div class="header">
<div class="headertitle">
<div class="title">sys_call.S</div> </div>
</div><!--header-->
<div class="contents">
<a href="../../d4/d81/i386_2sys__call_8S.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> /*-</div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>  * Copyright (c) 2002-2018 The UbixOS Project.</div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>  * All rights reserved.</div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>  *</div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>  * This was developed by Christopher W. Olsen for the UbixOS Project.</div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>  *</div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>  * Redistribution and use in source and binary forms, with or without modification, are permitted</div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>  * provided that the following conditions are met:</div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>  *</div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>  * 1) Redistributions of source code must retain the above copyright notice, this list of</div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>  * conditions, the following disclaimer and the list of authors.</div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>  * 2) Redistributions in binary form must reproduce the above copyright notice, this list of</div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>  * conditions, the following disclaimer and the list of authors in the documentation and/or</div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>  * other materials provided with the distribution.</div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>  * 3) Neither the name of the UbixOS Project nor the names of its contributors may be used to</div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>  * endorse or promote products derived from this software without specific prior written</div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>  * permission.</div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>  *</div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED</div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS</div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN</div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  */</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> .globl _sys_call</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> .text</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> .code32</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> _B4:</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> _B3:</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> nop</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> </div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> _ast:</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> </div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> _astRet:</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> </div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> _sysCall_MrOlsen:</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> //MrOlsen 2018-01-14 push $0x2</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> //MrOlsen 2018-01-14 sub $0x4,%esp</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> pusha</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> push %ds</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> push %es</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> push %fs</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> push %gs</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> mov $0x10,%eax</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> mov %eax,%ds</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> mov %eax,%es</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> mov %eax,%fs</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> cld</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> push %esp</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> call sys_call</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> add $0x4,%esp</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> cmpb $0x13,0x38(%esp)</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> je _B4</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> testl $0x2000,0x3c(%esp) /* Test If VM */</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> jz _notVM</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> jmp _isVM</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> _notVM:</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> testb $0x3,0x38(%esp) /* See If We're In User CS (GDT Entry 5) */</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> jz _popFS</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> jmp _popFS /* TMP BECAUSE ABOVE ISN'T RIGHT */</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> cli</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> mov %fs:0x0,%eax</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> testl $0x10800,0x80(%eax) /* Document This */</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> je _popFS</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> sti</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> push %esp</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> call _ast</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> add $0x4,%esp</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> jmp _astRet</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> _isVM:</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> hlt</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> </div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> _popFS:</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> pop %gs</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> pop %fs</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> pop %es</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> pop %ds</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> popa</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> //MrOlsen 2018-01-14 add $0x8,%esp</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> iret</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> </div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> _sys_call:</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> push $0x0</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> push $0x80</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> pusha</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> push %ds</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> push %es</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> push %fs</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> push %gs</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> mov $0x10,%eax</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span> mov %eax, %ds</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> mov %eax, %es</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> mov %eax, %fs</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> cld</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> push %esp</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> call sys_call</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> add $0x4,%esp /* Remove Stack Pointer From Stack */</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> pop %gs</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> pop %fs</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> pop %es</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> pop %ds</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> popa</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span> add $0x8,%esp //Back Out Error Code & trap_no</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> iret</div>
</div><!-- fragment --></div><!-- contents -->
</div><!-- doc-content -->
<!-- start footer part -->
<div id="nav-path" class="navpath"><!-- id is needed for treeview function! -->
<ul>
<li class="navelem"><a class="el" href="../../dir_ea9599923402ca8ab47fc3e495999dea.html">arch</a></li><li class="navelem"><a class="el" href="../../dir_e3f47f52fcd882b8ed14fae2e3a37090.html">i386</a></li><li class="navelem"><a class="el" href="../../d4/d81/i386_2sys__call_8S.html">sys_call.S</a></li>
<li class="footer">Generated by
<a href="http://www.doxygen.org/index.html">
<img class="footer" src="../../doxygen.png" alt="doxygen"/></a> 1.8.16 </li>
</ul>
</div>
</body>
</html>
