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<div class="title">pagefault.c</div> </div>
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<a href="pagefault_8c.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*-</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Copyright (c) 2002-2018 The UbixOS Project.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * All rights reserved.</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * This was developed by Christopher W. Olsen for the UbixOS Project.</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * Redistribution and use in source and binary forms, with or without modification, are permitted</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * provided that the following conditions are met:</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * 1) Redistributions of source code must retain the above copyright notice, this list of</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * conditions, the following disclaimer and the list of authors.</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * 2) Redistributions in binary form must reproduce the above copyright notice, this list of</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * conditions, the following disclaimer and the list of authors in the documentation and/or</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * other materials provided with the distribution.</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * 3) Neither the name of the UbixOS Project nor the names of its contributors may be used to</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * endorse or promote products derived from this software without specific prior written</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * permission.</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> */</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> <span class="preprocessor">#include <<a class="code" href="vmm_8h.html">vmm/vmm.h</a>></span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include <<a class="code" href="sched_8h.html">ubixos/sched.h</a>></span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include <<a class="code" href="kpanic_8h.html">ubixos/kpanic.h</a>></span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#include <<a class="code" href="spinlock_8h.html">ubixos/spinlock.h</a>></span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#include <<a class="code" href="kprintf_8h.html">lib/kprintf.h</a>></span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#include <<a class="code" href="trap_8h.html">sys/trap.h</a>></span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  </div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="keyword">static</span> <span class="keyword">struct </span><a class="code" href="structspinLock.html">spinLock</a> pageFaultSpinLock = <a class="code" href="spinlock_8h.html#a0fe85a4f3642683148b25916d6c5eafd">SPIN_LOCK_INITIALIZER</a>;</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  </div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment">/*****************************************************************************************</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment"></span> </div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"> Function: void vmm_pageFault(uInt32 memAddr,uInt32 eip,uInt32 esp);</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"> Description: This is the page fault handler, it will handle COW and trap all other</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"> exceptions and segfault the thread.</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"></span> </div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment"> Notes:</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment"></span> </div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment"> 07/30/02 - Fixed COW However I Need To Think Of A Way To Impliment</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment"> A Paging System Also Start To Add Security Levels</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment"></span> </div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment"> 07/27/04 - Added spin locking to ensure that we are thread safe. I know that spining a</span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment"> cpu is a waste of resources but for now it prevents errors.</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment"></span> </div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment"> *****************************************************************************************/</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"><a class="line" href="pagefault_8c.html#a046643b9b8c1ad9efffaaaeb5ff11431"> 53</a></span> <span class="comment">/* void vmm_pageFault(uInt32 memAddr,uInt32 eip,uInt32 esp) { */</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="keywordtype">void</span> <a class="code" href="pagefault_8c.html#a046643b9b8c1ad9efffaaaeb5ff11431">vmm_pageFault</a>(<span class="keyword">struct</span> <a class="code" href="structtrapframe.html">trapframe</a> *frame, <a class="code" href="include_2sys_2types_8h.html#a0238af00180b6d9278fa1c6aa790fdf4">uint32_t</a> cr2) {</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <a class="code" href="objgfx30_8h.html#ada085051a6d9a8e00a2cb256d1af14ba">uInt32</a> i = 0x0, pageTableIndex = 0x0, pageDirectoryIndex = 0x0;</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <a class="code" href="objgfx30_8h.html#ada085051a6d9a8e00a2cb256d1af14ba">uInt32</a> *pageDir = 0x0, *pageTable = 0x0;</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <a class="code" href="objgfx30_8h.html#ada085051a6d9a8e00a2cb256d1af14ba">uInt32</a> *src = 0x0, *dst = 0x0;</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  </div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <a class="code" href="include_2sys_2types_8h.html#a0238af00180b6d9278fa1c6aa790fdf4">uint32_t</a> esp = frame-><a class="code" href="structtrapframe.html#acbc06b1642fabea71bfa8ddbba3ede44">tf_esp</a>;</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <a class="code" href="include_2sys_2types_8h.html#a0238af00180b6d9278fa1c6aa790fdf4">uint32_t</a> eip = frame-><a class="code" href="structtrapframe.html#a5d510dabbcd29cf981b17a4c08234c3b">tf_eip</a>;</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <a class="code" href="include_2sys_2types_8h.html#a0238af00180b6d9278fa1c6aa790fdf4">uint32_t</a> memAddr = cr2;</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  </div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment">//MrOlsen 2017-12-15 -</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <a class="code" href="kprintf_8h.html#a20b56810edb62a6fe59917015c30848f">kprintf</a>(<span class="stringliteral">"CR2: [0x%X], EIP: 0x%X, ERR: 0x%X, PID: %i\n"</span>, cr2, frame-><a class="code" href="structtrapframe.html#a5d510dabbcd29cf981b17a4c08234c3b">tf_eip</a>, frame-><a class="code" href="structtrapframe.html#a9e4fa072056d86cd7516e9445822ef34">tf_err</a>, <a class="code" href="armv6_2sched_8c.html#a54397bfe18d5da4d50ff03b15f540858">_current</a>-><a class="code" href="structtaskStruct.html#a30966587a60db6b40c8be6c387e11d81">id</a>);</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  </div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="comment">/* Try to aquire lock otherwise spin till we do */</span></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <a class="code" href="armv6_2spinlock_8c.html#a71f03d2ba55111c715b6068254847a53">spinLock</a>(&pageFaultSpinLock);</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  </div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="comment">/* Set page dir pointer to the address of the visable page directory */</span></div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  pageDir = (<a class="code" href="include_2sys_2types_8h.html#a0238af00180b6d9278fa1c6aa790fdf4">uint32_t</a> *) <a class="code" href="paging_8h.html#a1b0f37794d3da1a86f1df77e503ed98f">PD_BASE_ADDR</a>;</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  </div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="comment">/* UBU - This is a temp panic for 0x0 read write later on I will handle this differently */</span></div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keywordflow">if</span> (memAddr == 0x0) {</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <a class="code" href="kprintf_8h.html#a20b56810edb62a6fe59917015c30848f">kprintf</a>(<span class="stringliteral">"Segfault At Address: [0x%X], ESP: [0x%X], PID: [%i], EIP: [0x%X]\n"</span>, memAddr, esp, <a class="code" href="armv6_2sched_8c.html#a54397bfe18d5da4d50ff03b15f540858">_current</a>-><a class="code" href="structtaskStruct.html#a30966587a60db6b40c8be6c387e11d81">id</a>, eip);</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <a class="code" href="armv6_2kpanic_8c.html#adb9a182aa071791a306163d50d653deb">kpanic</a>(<span class="stringliteral">"Error We Wrote To 0x0\n"</span>);</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  }</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>  <span class="comment">/* Calculate The Page Directory Index */</span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  pageDirectoryIndex = <a class="code" href="paging_8h.html#ac96f9536624cb5d2e7634f37fa919c4c">PD_INDEX</a>(memAddr);</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  </div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="comment">/* Calculate The Page Table Index */</span></div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  pageTableIndex = <a class="code" href="paging_8h.html#a2c6e29890bb0209384b6d012db48e2f7">PT_INDEX</a>(memAddr);</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  </div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="comment">/* UBU - This is a temporary routine for handling access to a page of a non existant page table */</span></div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keywordflow">if</span> (pageDir[pageDirectoryIndex] == 0x0) {</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <a class="code" href="kprintf_8h.html#a20b56810edb62a6fe59917015c30848f">kprintf</a>(<span class="stringliteral">"Segfault At Address: [0x%X][0x%X][%i][0x%X], Not A Valid Page Table\n"</span>, memAddr, esp, <a class="code" href="armv6_2sched_8c.html#a54397bfe18d5da4d50ff03b15f540858">_current</a>-><a class="code" href="structtaskStruct.html#a30966587a60db6b40c8be6c387e11d81">id</a>, eip);</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <a class="code" href="armv6_2spinlock_8c.html#ae29ab191c93f9ead066cb462dd2e7247">spinUnlock</a>(&pageFaultSpinLock);</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <a class="code" href="endtask_8h.html#a152c1859ada097cc21071f471bfa2e67">endTask</a>(<a class="code" href="armv6_2sched_8c.html#a54397bfe18d5da4d50ff03b15f540858">_current</a>-><a class="code" href="structtaskStruct.html#a30966587a60db6b40c8be6c387e11d81">id</a>);</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  }</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="comment">/* Set pageTable To Point To Virtual Address Of Page Table */</span></div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  pageTable = (<a class="code" href="include_2sys_2types_8h.html#a0238af00180b6d9278fa1c6aa790fdf4">uint32_t</a> *) (<a class="code" href="paging_8h.html#a8d42a9a09d9dea53cab3044f51482acc">PT_BASE_ADDR</a> + (<a class="code" href="paging_8h.html#a7d467c1d283fdfa1f2081ba1e0d01b6e">PAGE_SIZE</a> * pageDirectoryIndex));</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  </div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="comment">/* Test if this is a COW on page */</span></div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keywordflow">if</span> (((<a class="code" href="include_2sys_2types_8h.html#a0238af00180b6d9278fa1c6aa790fdf4">uint32_t</a>) pageTable[pageTableIndex] & <a class="code" href="paging_8h.html#a57d743cb60fe478f6720c42315e7e813">PAGE_COW</a>) == <a class="code" href="paging_8h.html#a57d743cb60fe478f6720c42315e7e813">PAGE_COW</a>) {</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="comment">/* Set Src To Base Address Of Page To Copy */</span></div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  src = (<a class="code" href="objgfx30_8h.html#ada085051a6d9a8e00a2cb256d1af14ba">uInt32</a> *) (memAddr & 0xFFFFF000);</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="comment">/* Allocate A Free Page For Destination */</span></div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="comment">/* USE vmInfo */</span></div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  dst = (<a class="code" href="objgfx30_8h.html#ada085051a6d9a8e00a2cb256d1af14ba">uInt32</a> *) <a class="code" href="paging_8h.html#ac5fa0688dfb2237da626a34ad6b36a92">vmm_getFreeVirtualPage</a>(<a class="code" href="armv6_2sched_8c.html#a54397bfe18d5da4d50ff03b15f540858">_current</a>-><a class="code" href="structtaskStruct.html#a30966587a60db6b40c8be6c387e11d81">id</a>, 1, 0x1);</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="comment">/* Copy Memory */</span></div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keywordflow">for</span> (i = 0; i < <a class="code" href="paging_8h.html#a91bd4c1c49996222f571b2f53ca00dc4">PD_ENTRIES</a>; i++) {</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  dst[i] = src[i];</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  }</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="comment">/* Adjust The COW Counter For Physical Page */</span></div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <a class="code" href="vmm_8h.html#aafef303dc8f2c6ed7bcf171819579166">adjustCowCounter</a>(((<a class="code" href="objgfx30_8h.html#ada085051a6d9a8e00a2cb256d1af14ba">uInt32</a>) pageTable[pageTableIndex] & 0xFFFFF000), -1);</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="comment">/* Remap In New Page */</span></div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  pageTable[pageTableIndex] = (<a class="code" href="objgfx30_8h.html#ada085051a6d9a8e00a2cb256d1af14ba">uInt32</a>) (<a class="code" href="paging_8h.html#a5522eccf81d4630537620209651be16e">vmm_getPhysicalAddr</a>((<a class="code" href="objgfx30_8h.html#ada085051a6d9a8e00a2cb256d1af14ba">uInt32</a>) dst) | (memAddr & 0xFFF));</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="comment">/* Unlink From Memory Map Allocated Page */</span></div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <a class="code" href="vmm_8h.html#a457446966aafafd939af6603f68516b1">vmm_unmapPage</a>((<a class="code" href="objgfx30_8h.html#ada085051a6d9a8e00a2cb256d1af14ba">uInt32</a>) dst, 1);</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  }</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (pageTable[pageTableIndex] != 0x0) {</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <a class="code" href="kprintf_8h.html#a20b56810edb62a6fe59917015c30848f">kprintf</a>(<span class="stringliteral">"Security failed pagetable not user permission\n"</span>);</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <a class="code" href="kprintf_8h.html#a20b56810edb62a6fe59917015c30848f">kprintf</a>(<span class="stringliteral">"pageDir: [0x%X]\n"</span>, pageDir[pageDirectoryIndex]);</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <a class="code" href="kprintf_8h.html#a20b56810edb62a6fe59917015c30848f">kprintf</a>(<span class="stringliteral">"pageTable: [0x%X:0x%X:0x%X:0x%X]\n"</span>, pageTable[pageTableIndex], pageTableIndex, pageDirectoryIndex, eip);</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <a class="code" href="kprintf_8h.html#a20b56810edb62a6fe59917015c30848f">kprintf</a>(<span class="stringliteral">"Segfault At Address: [0x%X][0x%X][%i][0x%X] Non Mapped.\n"</span>, memAddr, esp, <a class="code" href="armv6_2sched_8c.html#a54397bfe18d5da4d50ff03b15f540858">_current</a>-><a class="code" href="structtaskStruct.html#a30966587a60db6b40c8be6c387e11d81">id</a>, eip);</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <a class="code" href="armv6_2kpanic_8c.html#adb9a182aa071791a306163d50d653deb">kpanic</a>(<span class="stringliteral">"SIT HERE FOR NOW"</span>);</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <a class="code" href="trap_8c.html#a62b4617f9a2800b1e9baf8d6f93835bd">die_if_kernel</a>(<span class="stringliteral">"SEGFAULT"</span>, frame, 0xC);</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <a class="code" href="armv6_2spinlock_8c.html#ae29ab191c93f9ead066cb462dd2e7247">spinUnlock</a>(&pageFaultSpinLock);</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <a class="code" href="endtask_8h.html#a152c1859ada097cc21071f471bfa2e67">endTask</a>(<a class="code" href="armv6_2sched_8c.html#a54397bfe18d5da4d50ff03b15f540858">_current</a>-><a class="code" href="structtaskStruct.html#a30966587a60db6b40c8be6c387e11d81">id</a>);</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  }</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (memAddr < (<a class="code" href="armv6_2sched_8c.html#a54397bfe18d5da4d50ff03b15f540858">_current</a>-><a class="code" href="structtaskStruct.html#a481c2e7084fec272e616d3fb984036e2">td</a>.<a class="code" href="structthread.html#ac5ce95b5be4422e5f5a61f081547d425">vm_dsize</a> + <a class="code" href="armv6_2sched_8c.html#a54397bfe18d5da4d50ff03b15f540858">_current</a>-><a class="code" href="structtaskStruct.html#a481c2e7084fec272e616d3fb984036e2">td</a>.<a class="code" href="structthread.html#ae4165d082b98f27dab6bfeeefb76e060">vm_daddr</a>)) {</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <a class="code" href="kprintf_8h.html#a20b56810edb62a6fe59917015c30848f">kprintf</a>(<span class="stringliteral">"THIS IS BAD"</span>);</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <a class="code" href="trap_8c.html#a62b4617f9a2800b1e9baf8d6f93835bd">die_if_kernel</a>(<span class="stringliteral">"SEGFAULT"</span>, frame, 0xC);</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  pageTable[pageTableIndex] = (<a class="code" href="objgfx30_8h.html#ada085051a6d9a8e00a2cb256d1af14ba">uInt32</a>) <a class="code" href="vmm_8h.html#ab8e4e189a7b1df2a03072ce5b75c89fe">vmm_findFreePage</a>(<a class="code" href="armv6_2sched_8c.html#a54397bfe18d5da4d50ff03b15f540858">_current</a>-><a class="code" href="structtaskStruct.html#a30966587a60db6b40c8be6c387e11d81">id</a>) | <a class="code" href="paging_8h.html#af0fff7a38cd2c7a32d580787423b94ea">PAGE_DEFAULT</a>;</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  }</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <a class="code" href="armv6_2spinlock_8c.html#ae29ab191c93f9ead066cb462dd2e7247">spinUnlock</a>(&pageFaultSpinLock);</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="comment">/* Need To Create A Routine For Attempting To Access Non Mapped Memory */</span></div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <a class="code" href="kprintf_8h.html#a20b56810edb62a6fe59917015c30848f">kprintf</a>(<span class="stringliteral">"pageDir: [0x%X]\n"</span>, pageDir[pageDirectoryIndex]);</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <a class="code" href="kprintf_8h.html#a20b56810edb62a6fe59917015c30848f">kprintf</a>(<span class="stringliteral">"pageTable: [0x%X:0x%X:0x%X:0x%X]\n"</span>, pageTable[pageTableIndex], pageTableIndex, pageDirectoryIndex, eip);</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <a class="code" href="kprintf_8h.html#a20b56810edb62a6fe59917015c30848f">kprintf</a>(<span class="stringliteral">"Segfault At Address: [0x%X][0x%X][%i][0x%X] Non Mapped!\n"</span>, memAddr, esp, <a class="code" href="armv6_2sched_8c.html#a54397bfe18d5da4d50ff03b15f540858">_current</a>-><a class="code" href="structtaskStruct.html#a30966587a60db6b40c8be6c387e11d81">id</a>, eip);</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <a class="code" href="trap_8c.html#a62b4617f9a2800b1e9baf8d6f93835bd">die_if_kernel</a>(<span class="stringliteral">"SEGFAULT"</span>, frame, 0xC);</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <a class="code" href="armv6_2kpanic_8c.html#adb9a182aa071791a306163d50d653deb">kpanic</a>(<span class="stringliteral">"SIT HERE FOR NOW"</span>);</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <a class="code" href="kprintf_8h.html#a20b56810edb62a6fe59917015c30848f">kprintf</a>(<span class="stringliteral">"Out Of Stack Space: [0x%X]\n"</span>, memAddr & 0xFF0000);</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <a class="code" href="endtask_8h.html#a152c1859ada097cc21071f471bfa2e67">endTask</a>(<a class="code" href="armv6_2sched_8c.html#a54397bfe18d5da4d50ff03b15f540858">_current</a>-><a class="code" href="structtaskStruct.html#a30966587a60db6b40c8be6c387e11d81">id</a>);</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  }</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  }</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="keyword">asm</span> <span class="keyword">volatile</span>(</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="stringliteral">"movl %cr3,%eax\n"</span></div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="stringliteral">"movl %eax,%cr3\n"</span></div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  );</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  </div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="comment">/* Release the spin lock */</span></div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <a class="code" href="armv6_2spinlock_8c.html#ae29ab191c93f9ead066cb462dd2e7247">spinUnlock</a>(&pageFaultSpinLock);</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <a class="code" href="kprintf_8h.html#a20b56810edb62a6fe59917015c30848f">kprintf</a>(<span class="stringliteral">"CR2-RET"</span>);</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span> }</div>
</div><!-- fragment --></div><!-- contents -->
</div><!-- doc-content -->
<div class="ttc" id="astructtrapframe_html_a5d510dabbcd29cf981b17a4c08234c3b"><div class="ttname"><a href="structtrapframe.html#a5d510dabbcd29cf981b17a4c08234c3b">trapframe::tf_eip</a></div><div class="ttdeci">int tf_eip</div><div class="ttdef"><b>Definition:</b> <a href="trap_8h_source.html#l00050">trap.h:50</a></div></div>
<div class="ttc" id="aspinlock_8h_html"><div class="ttname"><a href="spinlock_8h.html">spinlock.h</a></div></div>
<div class="ttc" id="aobjgfx30_8h_html_ada085051a6d9a8e00a2cb256d1af14ba"><div class="ttname"><a href="objgfx30_8h.html#ada085051a6d9a8e00a2cb256d1af14ba">uInt32</a></div><div class="ttdeci">unsigned long int uInt32</div><div class="ttdef"><b>Definition:</b> <a href="objgfx30_8h_source.html#l00049">objgfx30.h:49</a></div></div>
<div class="ttc" id="atrap_8h_html"><div class="ttname"><a href="trap_8h.html">trap.h</a></div></div>
<div class="ttc" id="apaging_8h_html_a57d743cb60fe478f6720c42315e7e813"><div class="ttname"><a href="paging_8h.html#a57d743cb60fe478f6720c42315e7e813">PAGE_COW</a></div><div class="ttdeci">#define PAGE_COW</div><div class="ttdef"><b>Definition:</b> <a href="paging_8h_source.html#l00064">paging.h:64</a></div></div>
<div class="ttc" id="aarmv6_2spinlock_8c_html_ae29ab191c93f9ead066cb462dd2e7247"><div class="ttname"><a href="armv6_2spinlock_8c.html#ae29ab191c93f9ead066cb462dd2e7247">spinUnlock</a></div><div class="ttdeci">void spinUnlock(spinLock_t *lock)</div><div class="ttdef"><b>Definition:</b> <a href="armv6_2spinlock_8c_source.html#l00036">spinlock.c:36</a></div></div>
<div class="ttc" id="avmm_8h_html"><div class="ttname"><a href="vmm_8h.html">vmm.h</a></div></div>
<div class="ttc" id="apaging_8h_html_a5522eccf81d4630537620209651be16e"><div class="ttname"><a href="paging_8h.html#a5522eccf81d4630537620209651be16e">vmm_getPhysicalAddr</a></div><div class="ttdeci">uint32_t vmm_getPhysicalAddr(uint32_t)</div><div class="ttdef"><b>Definition:</b> <a href="getphysicaladdr_8c_source.html#l00038">getphysicaladdr.c:38</a></div></div>
<div class="ttc" id="avmm_8h_html_aafef303dc8f2c6ed7bcf171819579166"><div class="ttname"><a href="vmm_8h.html#aafef303dc8f2c6ed7bcf171819579166">adjustCowCounter</a></div><div class="ttdeci">int adjustCowCounter(uint32_t baseAddr, int adjustment)</div></div>
<div class="ttc" id="aspinlock_8h_html_a0fe85a4f3642683148b25916d6c5eafd"><div class="ttname"><a href="spinlock_8h.html#a0fe85a4f3642683148b25916d6c5eafd">SPIN_LOCK_INITIALIZER</a></div><div class="ttdeci">#define SPIN_LOCK_INITIALIZER</div><div class="ttdef"><b>Definition:</b> <a href="spinlock_8h_source.html#l00036">spinlock.h:36</a></div></div>
<div class="ttc" id="asched_8h_html"><div class="ttname"><a href="sched_8h.html">sched.h</a></div></div>
<div class="ttc" id="aarmv6_2kpanic_8c_html_adb9a182aa071791a306163d50d653deb"><div class="ttname"><a href="armv6_2kpanic_8c.html#adb9a182aa071791a306163d50d653deb">kpanic</a></div><div class="ttdeci">void kpanic(const char *fmt,...)</div><div class="ttdoc">print panic message and halt system</div><div class="ttdef"><b>Definition:</b> <a href="armv6_2kpanic_8c_source.html#l00041">kpanic.c:41</a></div></div>
<div class="ttc" id="avmm_8h_html_a457446966aafafd939af6603f68516b1"><div class="ttname"><a href="vmm_8h.html#a457446966aafafd939af6603f68516b1">vmm_unmapPage</a></div><div class="ttdeci">void vmm_unmapPage(uint32_t, unmapFlags_t)</div><div class="ttdef"><b>Definition:</b> <a href="unmappage_8c_source.html#l00047">unmappage.c:47</a></div></div>
<div class="ttc" id="astructtaskStruct_html_a481c2e7084fec272e616d3fb984036e2"><div class="ttname"><a href="structtaskStruct.html#a481c2e7084fec272e616d3fb984036e2">taskStruct::td</a></div><div class="ttdeci">struct thread td</div><div class="ttdef"><b>Definition:</b> <a href="sched_8h_source.html#l00078">sched.h:78</a></div></div>
<div class="ttc" id="aarmv6_2spinlock_8c_html_a71f03d2ba55111c715b6068254847a53"><div class="ttname"><a href="armv6_2spinlock_8c.html#a71f03d2ba55111c715b6068254847a53">spinLock</a></div><div class="ttdeci">void spinLock(spinLock_t *lock)</div><div class="ttdef"><b>Definition:</b> <a href="armv6_2spinlock_8c_source.html#l00055">spinlock.c:55</a></div></div>
<div class="ttc" id="akpanic_8h_html"><div class="ttname"><a href="kpanic_8h.html">kpanic.h</a></div></div>
<div class="ttc" id="astructtaskStruct_html_a30966587a60db6b40c8be6c387e11d81"><div class="ttname"><a href="structtaskStruct.html#a30966587a60db6b40c8be6c387e11d81">taskStruct::id</a></div><div class="ttdeci">pidType id</div><div class="ttdef"><b>Definition:</b> <a href="sched_8h_source.html#l00063">sched.h:63</a></div></div>
<div class="ttc" id="avmm_8h_html_ab8e4e189a7b1df2a03072ce5b75c89fe"><div class="ttname"><a href="vmm_8h.html#ab8e4e189a7b1df2a03072ce5b75c89fe">vmm_findFreePage</a></div><div class="ttdeci">uint32_t vmm_findFreePage(pidType pid)</div><div class="ttdef"><b>Definition:</b> <a href="vmm__memory_8c_source.html#l00221">vmm_memory.c:221</a></div></div>
<div class="ttc" id="apaging_8h_html_ac5fa0688dfb2237da626a34ad6b36a92"><div class="ttname"><a href="paging_8h.html#ac5fa0688dfb2237da626a34ad6b36a92">vmm_getFreeVirtualPage</a></div><div class="ttdeci">void * vmm_getFreeVirtualPage(pidType, int, int)</div><div class="ttdef"><b>Definition:</b> <a href="getfreevirtualpage_8c_source.html#l00047">getfreevirtualpage.c:47</a></div></div>
<div class="ttc" id="astructtrapframe_html_a9e4fa072056d86cd7516e9445822ef34"><div class="ttname"><a href="structtrapframe.html#a9e4fa072056d86cd7516e9445822ef34">trapframe::tf_err</a></div><div class="ttdeci">int tf_err</div><div class="ttdef"><b>Definition:</b> <a href="trap_8h_source.html#l00049">trap.h:49</a></div></div>
<div class="ttc" id="akprintf_8h_html"><div class="ttname"><a href="kprintf_8h.html">kprintf.h</a></div></div>
<div class="ttc" id="apaging_8h_html_ac96f9536624cb5d2e7634f37fa919c4c"><div class="ttname"><a href="paging_8h.html#ac96f9536624cb5d2e7634f37fa919c4c">PD_INDEX</a></div><div class="ttdeci">#define PD_INDEX(v_addr)</div><div class="ttdef"><b>Definition:</b> <a href="paging_8h_source.html#l00040">paging.h:40</a></div></div>
<div class="ttc" id="apaging_8h_html_af0fff7a38cd2c7a32d580787423b94ea"><div class="ttname"><a href="paging_8h.html#af0fff7a38cd2c7a32d580787423b94ea">PAGE_DEFAULT</a></div><div class="ttdeci">#define PAGE_DEFAULT</div><div class="ttdef"><b>Definition:</b> <a href="paging_8h_source.html#l00068">paging.h:68</a></div></div>
<div class="ttc" id="apaging_8h_html_a1b0f37794d3da1a86f1df77e503ed98f"><div class="ttname"><a href="paging_8h.html#a1b0f37794d3da1a86f1df77e503ed98f">PD_BASE_ADDR</a></div><div class="ttdeci">#define PD_BASE_ADDR</div><div class="ttdef"><b>Definition:</b> <a href="paging_8h_source.html#l00045">paging.h:45</a></div></div>
<div class="ttc" id="ainclude_2sys_2types_8h_html_a0238af00180b6d9278fa1c6aa790fdf4"><div class="ttname"><a href="include_2sys_2types_8h.html#a0238af00180b6d9278fa1c6aa790fdf4">uint32_t</a></div><div class="ttdeci">__uint32_t uint32_t</div><div class="ttdef"><b>Definition:</b> <a href="include_2sys_2types_8h_source.html#l00046">types.h:46</a></div></div>
<div class="ttc" id="astructtrapframe_html"><div class="ttname"><a href="structtrapframe.html">trapframe</a></div><div class="ttdef"><b>Definition:</b> <a href="trap_8h_source.html#l00034">trap.h:34</a></div></div>
<div class="ttc" id="aendtask_8h_html_a152c1859ada097cc21071f471bfa2e67"><div class="ttname"><a href="endtask_8h.html#a152c1859ada097cc21071f471bfa2e67">endTask</a></div><div class="ttdeci">void endTask(pidType)</div><div class="ttdef"><b>Definition:</b> <a href="endtask_8c_source.html#l00044">endtask.c:44</a></div></div>
<div class="ttc" id="astructthread_html_ac5ce95b5be4422e5f5a61f081547d425"><div class="ttname"><a href="structthread.html#ac5ce95b5be4422e5f5a61f081547d425">thread::vm_dsize</a></div><div class="ttdeci">u_long vm_dsize</div><div class="ttdef"><b>Definition:</b> <a href="thread_8h_source.html#l00044">thread.h:44</a></div></div>
<div class="ttc" id="aarmv6_2sched_8c_html_a54397bfe18d5da4d50ff03b15f540858"><div class="ttname"><a href="armv6_2sched_8c.html#a54397bfe18d5da4d50ff03b15f540858">_current</a></div><div class="ttdeci">kTask_t * _current</div><div class="ttdef"><b>Definition:</b> <a href="armv6_2sched_8c_source.html#l00050">sched.c:50</a></div></div>
<div class="ttc" id="apaging_8h_html_a2c6e29890bb0209384b6d012db48e2f7"><div class="ttname"><a href="paging_8h.html#a2c6e29890bb0209384b6d012db48e2f7">PT_INDEX</a></div><div class="ttdeci">#define PT_INDEX(v_addr)</div><div class="ttdef"><b>Definition:</b> <a href="paging_8h_source.html#l00042">paging.h:42</a></div></div>
<div class="ttc" id="astructthread_html_ae4165d082b98f27dab6bfeeefb76e060"><div class="ttname"><a href="structthread.html#ae4165d082b98f27dab6bfeeefb76e060">thread::vm_daddr</a></div><div class="ttdeci">u_long vm_daddr</div><div class="ttdef"><b>Definition:</b> <a href="thread_8h_source.html#l00043">thread.h:43</a></div></div>
<div class="ttc" id="astructspinLock_html"><div class="ttname"><a href="structspinLock.html">spinLock</a></div><div class="ttdef"><b>Definition:</b> <a href="spinlock_8h_source.html#l00041">spinlock.h:41</a></div></div>
<div class="ttc" id="atrap_8c_html_a62b4617f9a2800b1e9baf8d6f93835bd"><div class="ttname"><a href="trap_8c.html#a62b4617f9a2800b1e9baf8d6f93835bd">die_if_kernel</a></div><div class="ttdeci">void die_if_kernel(char *str, struct trapframe *regs, long err)</div><div class="ttdef"><b>Definition:</b> <a href="trap_8c_source.html#l00059">trap.c:59</a></div></div>
<div class="ttc" id="apaging_8h_html_a91bd4c1c49996222f571b2f53ca00dc4"><div class="ttname"><a href="paging_8h.html#a91bd4c1c49996222f571b2f53ca00dc4">PD_ENTRIES</a></div><div class="ttdeci">#define PD_ENTRIES</div><div class="ttdef"><b>Definition:</b> <a href="paging_8h_source.html#l00048">paging.h:48</a></div></div>
<div class="ttc" id="apaging_8h_html_a7d467c1d283fdfa1f2081ba1e0d01b6e"><div class="ttname"><a href="paging_8h.html#a7d467c1d283fdfa1f2081ba1e0d01b6e">PAGE_SIZE</a></div><div class="ttdeci">#define PAGE_SIZE</div><div class="ttdef"><b>Definition:</b> <a href="paging_8h_source.html#l00037">paging.h:37</a></div></div>
<div class="ttc" id="astructtrapframe_html_acbc06b1642fabea71bfa8ddbba3ede44"><div class="ttname"><a href="structtrapframe.html#acbc06b1642fabea71bfa8ddbba3ede44">trapframe::tf_esp</a></div><div class="ttdeci">int tf_esp</div><div class="ttdef"><b>Definition:</b> <a href="trap_8h_source.html#l00054">trap.h:54</a></div></div>
<div class="ttc" id="akprintf_8h_html_a20b56810edb62a6fe59917015c30848f"><div class="ttname"><a href="kprintf_8h.html#a20b56810edb62a6fe59917015c30848f">kprintf</a></div><div class="ttdeci">int kprintf(const char *,...)</div><div class="ttdef"><b>Definition:</b> <a href="kprintf_8c_source.html#l00259">kprintf.c:259</a></div></div>
<div class="ttc" id="apaging_8h_html_a8d42a9a09d9dea53cab3044f51482acc"><div class="ttname"><a href="paging_8h.html#a8d42a9a09d9dea53cab3044f51482acc">PT_BASE_ADDR</a></div><div class="ttdeci">#define PT_BASE_ADDR</div><div class="ttdef"><b>Definition:</b> <a href="paging_8h_source.html#l00046">paging.h:46</a></div></div>
<div class="ttc" id="apagefault_8c_html_a046643b9b8c1ad9efffaaaeb5ff11431"><div class="ttname"><a href="pagefault_8c.html#a046643b9b8c1ad9efffaaaeb5ff11431">vmm_pageFault</a></div><div class="ttdeci">void vmm_pageFault(struct trapframe *frame, uint32_t cr2)</div><div class="ttdef"><b>Definition:</b> <a href="pagefault_8c_source.html#l00053">pagefault.c:53</a></div></div>
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