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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_b87deefade4e886319aa926bd3ba1491.html">vmm</a></div>
<h1>copyvirtualspace.c</h1><a href="copyvirtualspace_8c.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: copyvirtualspace_8c-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 <span class="preprocessor">#include <<a class="code" href="vmm_8h.html">vmm/vmm.h</a>></span>
<a name="l00031"></a>00031 <span class="preprocessor">#include <<a class="code" href="kern__sysctl_8h.html">sys/kern_sysctl.h</a>></span>
<a name="l00032"></a>00032 <span class="preprocessor">#include <<a class="code" href="spinlock_8h.html">ubixos/spinlock.h</a>></span>
<a name="l00033"></a>00033 <span class="preprocessor">#include <<a class="code" href="kpanic_8h.html">ubixos/kpanic.h</a>></span>
<a name="l00034"></a>00034 <span class="preprocessor">#include <<a class="code" href="string_8h.html">string.h</a>></span>
<a name="l00035"></a>00035
<a name="l00036"></a><a class="code" href="copyvirtualspace_8c.html#d0e5c4817eb928f6db5f6b89bb96d997">00036</a> <span class="keyword">static</span> <a class="code" href="spinlock_8h.html#a240e9404b4ede1e0d714610080d1176">spinLock_t</a> <a class="code" href="copyvirtualspace_8c.html#d0e5c4817eb928f6db5f6b89bb96d997">cvsSpinLock</a> = <a class="code" href="spinlock_8h.html#0fe85a4f3642683148b25916d6c5eafd">SPIN_LOCK_INITIALIZER</a>;
<a name="l00037"></a>00037
<a name="l00038"></a>00038 <span class="comment">/************************************************************************</span>
<a name="l00039"></a>00039 <span class="comment"></span>
<a name="l00040"></a>00040 <span class="comment">Function: void *vmmCopyVirtualSpace(pidType pid);</span>
<a name="l00041"></a>00041 <span class="comment"></span>
<a name="l00042"></a>00042 <span class="comment">Description: Creates A Copy Of A Virtual Space And Set All NON Kernel</span>
<a name="l00043"></a>00043 <span class="comment"> Space To COW For A Fork This Will Also Alter The Parents</span>
<a name="l00044"></a>00044 <span class="comment"> VM Space To Make That COW As Well</span>
<a name="l00045"></a>00045 <span class="comment"></span>
<a name="l00046"></a>00046 <span class="comment">Notes:</span>
<a name="l00047"></a>00047 <span class="comment"></span>
<a name="l00048"></a>00048 <span class="comment">08/02/02 - Added Passing Of pidType pid So We Can Better Keep Track Of</span>
<a name="l00049"></a>00049 <span class="comment"> Which Task Has Which Physical Pages</span>
<a name="l00050"></a>00050 <span class="comment"></span>
<a name="l00051"></a>00051 <span class="comment">************************************************************************/</span>
<a name="l00052"></a>00052 <span class="keywordtype">void</span> *
<a name="l00053"></a><a class="code" href="copyvirtualspace_8c.html#2d305244a54b4bb8c56698eca1b4c82c">00053</a> <a class="code" href="paging_8h.html#41985de19bd46cbe3b702cee74168dec">vmmCopyVirtualSpace</a>(<a class="code" href="types_8h.html#e438ba74394b14d7b24b6df3b3b8c252">pidType</a> pid)
<a name="l00054"></a>00054 {
<a name="l00055"></a>00055 <span class="keywordtype">void</span> *newPageDirectoryAddress = 0x0;
<a name="l00056"></a>00056 <a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *parentPageDirectory = 0x0, *newPageDirectory = 0x0;
<a name="l00057"></a>00057 <a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *parentPageTable = 0x0, *newPageTable = 0x0;
<a name="l00058"></a>00058 <a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *parentStackPage = 0x0, *newStackPage = 0x0;
<a name="l00059"></a>00059 <a class="code" href="types_8h.html#3b65128d2644e9b80cec9a69bfa7e094">uInt16</a> x = 0, i = 0, s = 0;
<a name="l00060"></a>00060
<a name="l00061"></a>00061 <a class="code" href="spinlock_8h.html#2cd9a4502680fb8e7f0fe6b029e558b1">spinLock</a>(&<a class="code" href="copyvirtualspace_8c.html#d0e5c4817eb928f6db5f6b89bb96d997">cvsSpinLock</a>);
<a name="l00062"></a>00062
<a name="l00063"></a>00063 <span class="comment">/* Set Address Of Parent Page Directory */</span>
<a name="l00064"></a>00064 parentPageDirectory = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *) <a class="code" href="paging_8h.html#aab3609eb02bd28ded8d1ea0512da979">parentPageDirAddr</a>;
<a name="l00065"></a>00065 <span class="comment">/* Allocate A New Page For The New Page Directory */</span>
<a name="l00066"></a>00066 <span class="keywordflow">if</span> ((newPageDirectory = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *) <a class="code" href="paging_8h.html#30a38035243b9dfb285b3793788126be">vmmGetFreeKernelPage</a>(pid,1)) == 0x0)
<a name="l00067"></a>00067 <a class="code" href="kpanic_8h.html#db9a182aa071791a306163d50d653deb">kpanic</a>(<span class="stringliteral">"Error: newPageDirectory == NULL, File: %s, Line: %i\n"</span>,__FILE__,__LINE__);
<a name="l00068"></a>00068
<a name="l00069"></a>00069 <span class="comment">/* Set newPageDirectoryAddress To The Newly Created Page Directories Page */</span>
<a name="l00070"></a>00070 newPageDirectoryAddress = (<span class="keywordtype">void</span> *)<a class="code" href="paging_8h.html#e88bcfc69132a46a1982237913101a5b">vmm_getPhysicalAddr</a>((<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>) newPageDirectory);
<a name="l00071"></a>00071
<a name="l00072"></a>00072 <span class="comment">/* First Set Up A Flushed Page Directory */</span>
<a name="l00073"></a>00073 <a class="code" href="lib_2string_8h.html#ce4b911463887af5e748326323e99a23">memset</a>(newPageDirectory,0x0,0<a class="code" href="ap-boot_8S.html#f78b91f02427adef14bb8b28aa93baa5">x1000</a>);
<a name="l00074"></a>00074
<a name="l00075"></a>00075 <span class="comment">/* Map The Top 1GB Region Of The VM Space */</span>
<a name="l00076"></a>00076 <span class="keywordflow">for</span> (x = 768; x < <a class="code" href="paging_8h.html#b80d68a13753e40b0df8e0dc0c4af870">pageEntries</a>; x++) {
<a name="l00077"></a>00077 newPageDirectory[x] = parentPageDirectory[x];
<a name="l00078"></a>00078 }
<a name="l00079"></a>00079
<a name="l00080"></a>00080 <span class="comment">/*</span>
<a name="l00081"></a>00081 <span class="comment"> * Now For The Fun Stuff For Page Tables 1-766 We Must Map These And Set</span>
<a name="l00082"></a>00082 <span class="comment"> * The Permissions On Every Mapped Pages To COW This Will Conserve Memory</span>
<a name="l00083"></a>00083 <span class="comment"> * Because The Two VM Spaces Will Be Sharing Some Pages</span>
<a name="l00084"></a>00084 <span class="comment"> */</span>
<a name="l00085"></a>00085 <span class="keywordflow">for</span> (x = 0<a class="code" href="ap-boot_8S.html#1a3ac2137e21f6f0d400f1996914dd19">x1</a>; x <= 766; x++) {
<a name="l00086"></a>00086 <span class="comment">/* If Page Table Exists Map It */</span>
<a name="l00087"></a>00087 <span class="keywordflow">if</span> (parentPageDirectory[x] != 0) {
<a name="l00088"></a>00088 <span class="comment">/* Set Parent To Propper Page Table */</span>
<a name="l00089"></a>00089 parentPageTable = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *) (<a class="code" href="paging_8h.html#a432d41840ad8a583a7e6af86feece4f">tablesBaseAddress</a> + (0<a class="code" href="ap-boot_8S.html#f78b91f02427adef14bb8b28aa93baa5">x1000</a> * x));
<a name="l00090"></a>00090 <span class="comment">/* Allocate A New Page Table */</span>
<a name="l00091"></a>00091 <span class="keywordflow">if</span> ((newPageTable = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *) <a class="code" href="paging_8h.html#30a38035243b9dfb285b3793788126be">vmmGetFreeKernelPage</a>(pid,1)) == 0x0)
<a name="l00092"></a>00092 <a class="code" href="kpanic_8h.html#db9a182aa071791a306163d50d653deb">kpanic</a>(<span class="stringliteral">"Error: newPageTable == NULL, File: %s, Line: %i\n"</span>,__FILE__,__LINE__);
<a name="l00093"></a>00093
<a name="l00094"></a>00094 <span class="comment">/* Set Parent And New Pages To COW */</span>
<a name="l00095"></a>00095 <span class="keywordflow">for</span> (i = 0; i < pageEntries; i++) {
<a name="l00096"></a>00096
<a name="l00097"></a>00097 <span class="comment">/* If Page Is Mapped */</span>
<a name="l00098"></a>00098 <span class="keywordflow">if</span> ((parentPageTable[i] & 0xFFFFF000) != 0x0) {
<a name="l00099"></a>00099 <span class="comment">/* Check To See If Its A Stack Page */</span>
<a name="l00100"></a>00100 <span class="keywordflow">if</span> (((<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>) parentPageTable[i] & <a class="code" href="paging_8h.html#1532db17068ba8d409b8ffe066414af2">PAGE_STACK</a>) == PAGE_STACK) {
<a name="l00101"></a>00101 <span class="comment">/* Alloc A New Page For This Stack Page */</span>
<a name="l00102"></a>00102 <span class="keywordflow">if</span> ((newStackPage = (uInt32 *) <a class="code" href="paging_8h.html#30a38035243b9dfb285b3793788126be">vmmGetFreeKernelPage</a>(pid,1)) == 0x0)
<a name="l00103"></a>00103 <a class="code" href="kpanic_8h.html#db9a182aa071791a306163d50d653deb">kpanic</a>(<span class="stringliteral">"Error: newStackPage == NULL, File: %s, Line: %i\n"</span>,__FILE__,__LINE__);
<a name="l00104"></a>00104
<a name="l00105"></a>00105 <span class="comment">/* Set Pointer To Parents Stack Page */</span>
<a name="l00106"></a>00106 parentStackPage = (uInt32 *) (((1024 * 4096) * x) + (4096 * i));
<a name="l00107"></a>00107
<a name="l00108"></a>00108 <span class="comment">/* Copy The Tack Byte For Byte (I Should Find A Faster Way) */</span>
<a name="l00109"></a>00109 <span class="keywordflow">for</span> (s = 0x0; s < pageEntries; s++) {
<a name="l00110"></a>00110 newStackPage[s] = parentStackPage[s];
<a name="l00111"></a>00111 }
<a name="l00112"></a>00112 <span class="comment">/* Insert New Stack Into Page Table */</span>
<a name="l00113"></a>00113 newPageTable[i] = (<a class="code" href="paging_8h.html#e88bcfc69132a46a1982237913101a5b">vmm_getPhysicalAddr</a>((uInt32) newStackPage) | <a class="code" href="paging_8h.html#f0fff7a38cd2c7a32d580787423b94ea">PAGE_DEFAULT</a> | PAGE_STACK);
<a name="l00114"></a>00114 <span class="comment">/* Unmap From Kernel Space */</span>
<a name="l00115"></a>00115 <a class="code" href="paging_8h.html#fd94da50e455602f86ad7dae2fc9d1db">vmmUnmapPage</a>((uInt32) newStackPage, 1);
<a name="l00116"></a>00116 }
<a name="l00117"></a>00117 <span class="keywordflow">else</span> {
<a name="l00118"></a>00118 <span class="comment">/* Set Page To COW In Parent And Child Space */</span>
<a name="l00119"></a>00119 newPageTable[i] = (((uInt32) parentPageTable[i] & 0xFFFFF000) | (<a class="code" href="paging_8h.html#f0fff7a38cd2c7a32d580787423b94ea">PAGE_DEFAULT</a> | <a class="code" href="paging_8h.html#57d743cb60fe478f6720c42315e7e813">PAGE_COW</a>));
<a name="l00120"></a>00120 <span class="comment">/* Increment The COW Counter For This Page */</span>
<a name="l00121"></a>00121 <span class="keywordflow">if</span> (((uInt32) parentPageTable[i] & <a class="code" href="paging_8h.html#57d743cb60fe478f6720c42315e7e813">PAGE_COW</a>) == <a class="code" href="paging_8h.html#57d743cb60fe478f6720c42315e7e813">PAGE_COW</a>) {
<a name="l00122"></a>00122 <a class="code" href="vmm_8h.html#362d462b3a1e19b5e0ef95e1839dbf11">adjustCowCounter</a>(((uInt32) parentPageTable[i] & 0xFFFFF000), 1);
<a name="l00123"></a>00123 }
<a name="l00124"></a>00124 <span class="keywordflow">else</span> {
<a name="l00125"></a>00125 <a class="code" href="vmm_8h.html#362d462b3a1e19b5e0ef95e1839dbf11">adjustCowCounter</a>(((uInt32) parentPageTable[i] & 0xFFFFF000), 2);
<a name="l00126"></a>00126 parentPageTable[i] = newPageTable[i];
<a name="l00127"></a>00127 }
<a name="l00128"></a>00128 }
<a name="l00129"></a>00129 }
<a name="l00130"></a>00130 <span class="keywordflow">else</span> {
<a name="l00131"></a>00131 newPageTable[i] = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>) 0x0;
<a name="l00132"></a>00132 }
<a name="l00133"></a>00133 }
<a name="l00134"></a>00134
<a name="l00135"></a>00135 <span class="comment">/* Put New Page Table Into New Page Directory */</span>
<a name="l00136"></a>00136 newPageDirectory[x] = (<a class="code" href="paging_8h.html#e88bcfc69132a46a1982237913101a5b">vmm_getPhysicalAddr</a>((<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>) newPageTable) | <a class="code" href="paging_8h.html#f0fff7a38cd2c7a32d580787423b94ea">PAGE_DEFAULT</a>);
<a name="l00137"></a>00137 <span class="comment">/* Unmap Page From Kernel Space But Keep It Marked As Not Avail */</span>
<a name="l00138"></a>00138 <a class="code" href="paging_8h.html#fd94da50e455602f86ad7dae2fc9d1db">vmmUnmapPage</a>((<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>) newPageTable, 1);
<a name="l00139"></a>00139 } <span class="keywordflow">else</span> {
<a name="l00140"></a>00140 newPageDirectory[x] = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>) 0x0;
<a name="l00141"></a>00141 }
<a name="l00142"></a>00142 }
<a name="l00143"></a>00143 <span class="comment">/*</span>
<a name="l00144"></a>00144 <span class="comment"> * Allocate A New Page For The The First Page Table Where We Will Map The</span>
<a name="l00145"></a>00145 <span class="comment"> * Lower Region</span>
<a name="l00146"></a>00146 <span class="comment"> */</span>
<a name="l00147"></a>00147 <span class="keywordflow">if</span> ((newPageTable = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *) <a class="code" href="paging_8h.html#30a38035243b9dfb285b3793788126be">vmmGetFreeKernelPage</a>(pid,1)) == 0x0)
<a name="l00148"></a>00148 <a class="code" href="kpanic_8h.html#db9a182aa071791a306163d50d653deb">kpanic</a>(<span class="stringliteral">"Error: newPageTable == NULL, File: %s, Line: %i\n"</span>,__FILE__,__LINE__);
<a name="l00149"></a>00149
<a name="l00150"></a>00150 <span class="comment">/* Flush The Page From Garbage In Memory */</span>
<a name="l00151"></a>00151 <a class="code" href="lib_2string_8h.html#ce4b911463887af5e748326323e99a23">memset</a>(newPageTable,0x0,0<a class="code" href="ap-boot_8S.html#f78b91f02427adef14bb8b28aa93baa5">x1000</a>);
<a name="l00152"></a>00152
<a name="l00153"></a>00153 <span class="comment">/* Map This Into The Page Directory */</span>
<a name="l00154"></a>00154 newPageDirectory[0] = (<a class="code" href="paging_8h.html#e88bcfc69132a46a1982237913101a5b">vmm_getPhysicalAddr</a>((<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>) newPageTable) | <a class="code" href="paging_8h.html#f0fff7a38cd2c7a32d580787423b94ea">PAGE_DEFAULT</a>);
<a name="l00155"></a>00155 <span class="comment">/* Set Address Of Parents Page Table */</span>
<a name="l00156"></a>00156 parentPageTable = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *) <a class="code" href="paging_8h.html#a432d41840ad8a583a7e6af86feece4f">tablesBaseAddress</a>;
<a name="l00157"></a>00157 <span class="comment">/* Map The First 1MB Worth Of Pages */</span>
<a name="l00158"></a>00158 <span class="keywordflow">for</span> (x = 0; x < (pageEntries / 4); x++) {
<a name="l00159"></a>00159 newPageTable[x] = parentPageTable[x];
<a name="l00160"></a>00160 }
<a name="l00161"></a>00161 <span class="comment">/* Map The Next 3MB Worth Of Pages But Make Them COW */</span>
<a name="l00162"></a>00162 <span class="keywordflow">for</span> (x = (pageEntries / 4) + 1; x < pageEntries; x++) {
<a name="l00163"></a>00163 <span class="comment">/* If Page Is Avaiable Map It */</span>
<a name="l00164"></a>00164 <span class="keywordflow">if</span> ((parentPageTable[x] & 0xFFFFF000) != 0x0) {
<a name="l00165"></a>00165 <span class="comment">/* Set Pages To COW */</span>
<a name="l00166"></a>00166 newPageTable[x] = (((<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>) parentPageTable[x] & 0xFFFFF000) | (<a class="code" href="paging_8h.html#f0fff7a38cd2c7a32d580787423b94ea">PAGE_DEFAULT</a> | <a class="code" href="paging_8h.html#57d743cb60fe478f6720c42315e7e813">PAGE_COW</a>));
<a name="l00167"></a>00167 <span class="comment">/* Increment The COW Counter For This Page */</span>
<a name="l00168"></a>00168 <span class="keywordflow">if</span> (((<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>) parentPageTable[x] & <a class="code" href="paging_8h.html#57d743cb60fe478f6720c42315e7e813">PAGE_COW</a>) == PAGE_COW) {
<a name="l00169"></a>00169 <a class="code" href="vmm_8h.html#362d462b3a1e19b5e0ef95e1839dbf11">adjustCowCounter</a>(((uInt32) parentPageTable[x] & 0xFFFFF000), 1);
<a name="l00170"></a>00170 } <span class="keywordflow">else</span> {
<a name="l00171"></a>00171 <a class="code" href="vmm_8h.html#362d462b3a1e19b5e0ef95e1839dbf11">adjustCowCounter</a>(((uInt32) parentPageTable[x] & 0xFFFFF000), 2);
<a name="l00172"></a>00172 parentPageTable[x] = newPageTable[x];
<a name="l00173"></a>00173 }
<a name="l00174"></a>00174 } <span class="keywordflow">else</span> {
<a name="l00175"></a>00175 newPageTable[x] = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>) 0x0;
<a name="l00176"></a>00176 }
<a name="l00177"></a>00177 }
<a name="l00178"></a>00178 <span class="comment">/* Set Virtual Mapping For Page Directory */</span>
<a name="l00179"></a>00179 newPageTable[256] = (<a class="code" href="paging_8h.html#e88bcfc69132a46a1982237913101a5b">vmm_getPhysicalAddr</a>((<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>) newPageDirectory) | <a class="code" href="paging_8h.html#f0fff7a38cd2c7a32d580787423b94ea">PAGE_DEFAULT</a>);
<a name="l00180"></a>00180
<a name="l00181"></a>00181 <span class="comment">/*</span>
<a name="l00182"></a>00182 <span class="comment"> * Now The Fun Stuff Build The Initial Virtual Page Space So We Don't Have</span>
<a name="l00183"></a>00183 <span class="comment"> * To Worry About Mapping Them In Later How Ever I'm Concerned This May</span>
<a name="l00184"></a>00184 <span class="comment"> * Become A Security Issue</span>
<a name="l00185"></a>00185 <span class="comment"> */</span>
<a name="l00186"></a>00186 <span class="comment">/* First Lets Unmap The Previously Allocated Page Table */</span>
<a name="l00187"></a>00187 <a class="code" href="paging_8h.html#fd94da50e455602f86ad7dae2fc9d1db">vmmUnmapPage</a>((<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>) newPageTable, 1);
<a name="l00188"></a>00188 <span class="comment">/* Allocate A New Page Table */</span>
<a name="l00189"></a>00189 <span class="keywordflow">if</span> ((newPageTable = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *) <a class="code" href="paging_8h.html#30a38035243b9dfb285b3793788126be">vmmGetFreeKernelPage</a>(pid,1)) == 0x0)
<a name="l00190"></a>00190 <a class="code" href="kpanic_8h.html#db9a182aa071791a306163d50d653deb">kpanic</a>(<span class="stringliteral">"Error: newPageTable == NULL, File: %s, Line: %i\n"</span>,__FILE__,__LINE__);
<a name="l00191"></a>00191 <span class="comment">/* First Set Our Page Directory To Contain This */</span>
<a name="l00192"></a>00192 newPageDirectory[767] = <a class="code" href="paging_8h.html#e88bcfc69132a46a1982237913101a5b">vmm_getPhysicalAddr</a>((<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>) newPageTable) | <a class="code" href="paging_8h.html#f0fff7a38cd2c7a32d580787423b94ea">PAGE_DEFAULT</a>;
<a name="l00193"></a>00193 <span class="comment">/* Now Lets Build The Page Table */</span>
<a name="l00194"></a>00194 <span class="keywordflow">for</span> (x = 0; x < pageEntries; x++) {
<a name="l00195"></a>00195 newPageTable[x] = newPageDirectory[x];
<a name="l00196"></a>00196 }
<a name="l00197"></a>00197 <span class="comment">/* Now We Are Done So Lets Unmap This Page */</span>
<a name="l00198"></a>00198 <a class="code" href="paging_8h.html#fd94da50e455602f86ad7dae2fc9d1db">vmmUnmapPage</a>((<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>) newPageTable, 1);
<a name="l00199"></a>00199 <span class="comment">/* Now We Are Done With The Page Directory So Lets Unmap That Too */</span>
<a name="l00200"></a>00200 <a class="code" href="paging_8h.html#fd94da50e455602f86ad7dae2fc9d1db">vmmUnmapPage</a>((uInt32) newPageDirectory, 1);
<a name="l00201"></a>00201
<a name="l00202"></a>00202 <a class="code" href="spinlock_8h.html#dd996cbbb3b9826dd9c8cf02b66a4c65">spinUnlock</a>(&<a class="code" href="copyvirtualspace_8c.html#d0e5c4817eb928f6db5f6b89bb96d997">cvsSpinLock</a>);
<a name="l00203"></a>00203
<a name="l00204"></a>00204 <span class="comment">/* Return Physical Address Of Page Directory */</span>
<a name="l00205"></a>00205 <span class="keywordflow">return</span> (newPageDirectoryAddress);
<a name="l00206"></a>00206 }
<a name="l00207"></a>00207
<a name="l00208"></a>00208 <span class="comment">/***</span>
<a name="l00209"></a>00209 <span class="comment"> $Log: copyvirtualspace_8c-source.html,v $
<a name="l00209"></a>00209 <span class="comment"> Revision 1.7 2006/12/15 17:47:04 reddawg
<a name="l00209"></a>00209 <span class="comment"> Updates
<a name="l00209"></a>00209 <span class="comment"></span>
<a name="l00210"></a>00210 <span class="comment"> Revision 1.4 2006/12/05 14:10:21 reddawg</span>
<a name="l00211"></a>00211 <span class="comment"> Workign Distro</span>
<a name="l00212"></a>00212 <span class="comment"></span>
<a name="l00213"></a>00213 <span class="comment"> Revision 1.3 2006/12/01 05:12:35 reddawg</span>
<a name="l00214"></a>00214 <span class="comment"> We're almost there... :)</span>
<a name="l00215"></a>00215 <span class="comment"></span>
<a name="l00216"></a>00216 <span class="comment"> Revision 1.2 2006/11/06 19:10:12 reddawg</span>
<a name="l00217"></a>00217 <span class="comment"> Lots Of Updates... Still having issues with brk();</span>
<a name="l00218"></a>00218 <span class="comment"></span>
<a name="l00219"></a>00219 <span class="comment"> Revision 1.1.1.1 2006/06/01 12:46:13 reddawg</span>
<a name="l00220"></a>00220 <span class="comment"> ubix2</span>
<a name="l00221"></a>00221 <span class="comment"></span>
<a name="l00222"></a>00222 <span class="comment"> Revision 1.2 2005/10/12 00:13:38 reddawg</span>
<a name="l00223"></a>00223 <span class="comment"> Removed</span>
<a name="l00224"></a>00224 <span class="comment"></span>
<a name="l00225"></a>00225 <span class="comment"> Revision 1.1.1.1 2005/09/26 17:24:49 reddawg</span>
<a name="l00226"></a>00226 <span class="comment"> no message</span>
<a name="l00227"></a>00227 <span class="comment"></span>
<a name="l00228"></a>00228 <span class="comment"> Revision 1.7 2004/07/28 15:05:43 reddawg</span>
<a name="l00229"></a>00229 <span class="comment"> Major:</span>
<a name="l00230"></a>00230 <span class="comment"> Pages now have strict security enforcement.</span>
<a name="l00231"></a>00231 <span class="comment"> Many null dereferences have been resolved.</span>
<a name="l00232"></a>00232 <span class="comment"> When apps loaded permissions set for pages rw and ro</span>
<a name="l00233"></a>00233 <span class="comment"></span>
<a name="l00234"></a>00234 <span class="comment"> Revision 1.6 2004/07/26 19:15:49 reddawg</span>
<a name="l00235"></a>00235 <span class="comment"> test code, fixes and the like</span>
<a name="l00236"></a>00236 <span class="comment"></span>
<a name="l00237"></a>00237 <span class="comment"> Revision 1.5 2004/07/25 06:04:00 reddawg</span>
<a name="l00238"></a>00238 <span class="comment"> Last of my fixes for the morning</span>
<a name="l00239"></a>00239 <span class="comment"></span>
<a name="l00240"></a>00240 <span class="comment"> Revision 1.4 2004/07/20 22:29:55 reddawg</span>
<a name="l00241"></a>00241 <span class="comment"> assert: remade assert</span>
<a name="l00242"></a>00242 <span class="comment"></span>
<a name="l00243"></a>00243 <span class="comment"> Revision 1.3 2004/07/19 01:58:12 reddawg</span>
<a name="l00244"></a>00244 <span class="comment"> vmmCopyVirtualSpace: cleaned up one full page memory leak we were still using old sysID over pid</span>
<a name="l00245"></a>00245 <span class="comment"></span>
<a name="l00246"></a>00246 <span class="comment"> Revision 1.2 2004/06/15 12:35:05 reddawg</span>
<a name="l00247"></a>00247 <span class="comment"> Cleaned Up</span>
<a name="l00248"></a>00248 <span class="comment"></span>
<a name="l00249"></a>00249 <span class="comment"> Revision 1.1.1.1 2004/04/15 12:06:51 reddawg</span>
<a name="l00250"></a>00250 <span class="comment"> UbixOS v1.0</span>
<a name="l00251"></a>00251 <span class="comment"></span>
<a name="l00252"></a>00252 <span class="comment"> Revision 1.14 2004/04/13 16:36:34 reddawg</span>
<a name="l00253"></a>00253 <span class="comment"> Changed our copyright, it is all now under a BSD-Style license</span>
<a name="l00254"></a>00254 <span class="comment"></span>
<a name="l00255"></a>00255 <span class="comment"> END</span>
<a name="l00256"></a>00256 <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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