4860 lines
244 KiB
HTML
4860 lines
244 KiB
HTML
<html>
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<head>
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p
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pre
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|
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mso-style-link:"HTML Ԥ<><D4A4><EFBFBD>ʽ Char\,HTML Ԥ<>ȸ<EFBFBD>ʽ<EFBFBD><CABD> Char\,HTML Ԥ<>ȸ<EFBFBD>ʽ<EFBFBD><CABD>1 Char\,HTML Ԥ<>ȸ<EFBFBD>ʽ<EFBFBD><CABD>2 Char\,HTML Ԥ<>ȸ<EFBFBD>ʽ<EFBFBD><CABD>3 Char";
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tt
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{font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
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{mso-style-link:"<22><>ע<EFBFBD><D7A2><EFBFBD><EFBFBD> Char";
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{mso-style-link:"<22><>ע<EFBFBD><D7A2><EFBFBD>ı<EFBFBD> Char";
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{mso-style-name:<EFBFBD><EFBFBD>ʽ1;
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span.Char
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{mso-style-name:"<22><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> Char";
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{mso-style-name:ͼ˵<EFBFBD><EFBFBD>;
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span.Char0
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{mso-style-name:"ͼ˵<CDBC><CBB5> Char";
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{mso-style-name:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>1;
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{mso-style-name:<EFBFBD>DZ<EFBFBD><EFBFBD><EFBFBD>1;
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p.a1, li.a1, div.a1
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{mso-style-name:<EFBFBD>ı<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
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{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char";
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mso-style-link:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char Char";
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margin-bottom:.0001pt;
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text-align:center;
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font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
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span.3CharCharChar
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{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char Char";
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mso-style-link:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char";
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{mso-style-name:<EFBFBD>ʼ<EFBFBD>post;
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p.3, li.3, div.3
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{mso-style-name:ͼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3;
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font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
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span.3CharChar1CharCharChar
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{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char1 Char Char Char";
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span.3CharChar1CharChar
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{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char1 Char Char";
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p.5Char, li.5Char, div.5Char
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{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>5<EFBFBD><35> Char";
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mso-style-link:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>5<EFBFBD><35> Char Char";
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font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
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span.5CharChar
|
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{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>5<EFBFBD><35> Char Char";
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mso-style-link:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>5<EFBFBD><35> Char";
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font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
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p.5CharChar0, li.5CharChar0, div.5CharChar0
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{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С5<D0A1><35> Char Char";
|
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mso-style-link:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С5<D0A1><35> Char Char Char";
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font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
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span.5CharCharChar
|
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{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С5<D0A1><35> Char Char Char";
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mso-style-link:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С5<D0A1><35> Char Char";
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p.5Char0, li.5Char0, div.5Char0
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{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С5<D0A1><35> Char";
|
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|
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margin-bottom:.0001pt;
|
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p.5, li.5, div.5
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{mso-style-name:ͼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С5<EFBFBD><EFBFBD>;
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margin-bottom:.0001pt;
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p.2, li.2, div.2
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{mso-style-name:<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>2;
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p.20, li.20, div.20
|
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{mso-style-name:ͼ˵<EFBFBD><EFBFBD>2;
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margin-bottom:.0001pt;
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font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
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p.21, li.21, div.21
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{mso-style-name:<EFBFBD>ı<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>2;
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p.3CharCharCharCharChar, li.3CharCharCharCharChar, div.3CharCharCharCharChar
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{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char Char Char Char";
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mso-style-link:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char Char Char Char Char";
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|
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span.3CharCharCharCharCharChar
|
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{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char Char Char Char Char";
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mso-style-link:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char Char Char Char";
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p.a2, li.a2, div.a2
|
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{mso-style-name:ͼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
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p.110, li.110, div.110
|
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{mso-style-name:"<22><>ʽ <20><><EFBFBD><EFBFBD> 1 + <20><><EFBFBD><EFBFBD>1";
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span.1Char
|
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{mso-style-name:"<22><><EFBFBD><EFBFBD> 1 Char";
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mso-style-link:"<22><><EFBFBD><EFBFBD> 1";
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font-weight:bold;}
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p.22, li.22, div.22
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{mso-style-name:"<22><>ʽ <20>б<EFBFBD> 2 + <20><><EFBFBD><EFBFBD>";
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p.23, li.23, div.23
|
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{mso-style-name:<EFBFBD>б<EFBFBD>2;
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p.50, li.50, div.50
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{mso-style-name:ͼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>5<EFBFBD><EFBFBD>;
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margin-bottom:.0001pt;
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p.111, li.111, div.111
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{mso-style-name:<EFBFBD><EFBFBD>ʽ11;
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margin-top:0cm;
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|
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margin-bottom:.0001pt;
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p.12, li.12, div.12
|
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{mso-style-name:<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>1;
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p.13, li.13, div.13
|
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{mso-style-name:ͼ˵<EFBFBD><EFBFBD>1;
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margin-bottom:.0001pt;
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p.01, li.01, div.01
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{mso-style-name:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>01;
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p.112, li.112, div.112
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{mso-style-name:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>11;
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p.113, li.113, div.113
|
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{mso-style-name:<EFBFBD>DZ<EFBFBD><EFBFBD><EFBFBD>11;
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margin-top:7.8pt;
|
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|
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p.14, li.14, div.14
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{mso-style-name:<EFBFBD>ı<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>1;
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p.3Char1, li.3Char1, div.3Char1
|
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{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char1";
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p.post1, li.post1, div.post1
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{mso-style-name:<EFBFBD>ʼ<EFBFBD>post1;
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p.31, li.31, div.31
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{mso-style-name:ͼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>31;
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p.5Char1, li.5Char1, div.5Char1
|
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{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>5<EFBFBD><35> Char1";
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p.5CharChar1, li.5CharChar1, div.5CharChar1
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{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С5<D0A1><35> Char Char1";
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font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
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p.5Char10, li.5Char10, div.5Char10
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{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С5<D0A1><35> Char1";
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margin:0cm;
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margin-bottom:.0001pt;
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text-align:center;
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font-size:9.0pt;
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p.51, li.51, div.51
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|
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|
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|
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|
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|
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|
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{mso-style-name:"<22><><EFBFBD><EFBFBD> 3 Char";
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|
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|
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|
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|
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span.6Char
|
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|
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|
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|
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p.1c, li.1c, div.1c
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|
||
{page:WordSection1;}
|
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/* List Definitions */
|
||
ol
|
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{margin-bottom:0cm;}
|
||
ul
|
||
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|
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-->
|
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|
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|
||
</head>
|
||
|
||
<body lang=ZH-CN link=blue vlink=purple style='text-justify-trim:punctuation'>
|
||
|
||
<div class=WordSection1 style='layout-grid:15.6pt'>
|
||
|
||
<p class=ab><a name="_Toc53320652"><span style='font-family:<3A><><EFBFBD><EFBFBD>'><EFBFBD><EFBFBD><EFBFBD><EFBFBD></span><span
|
||
lang=EN-US>13-1 linux/mm/memory.c</span></a></p>
|
||
|
||
<div class=a align=center style='text-align:center'><span lang=EN-US>
|
||
|
||
<hr size=4 width="100%" align=center>
|
||
|
||
</span></div>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>1</span></u> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>2</span></u> <b><i> *
|
||
linux/mm/memory.c</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>3</span></u> <b><i> *</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>4</span></u> <b><i> *
|
||
(C) 1991 Linus Torvalds</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>5</span></u> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>6</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>7</span></u> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>8</span></u> <b><i> *
|
||
demand-loading started 01.12.91 - seems it is high on the list of</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>9</span></u> <b><i> *
|
||
things wanted, and it should be easy to implement. - Linus</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>10</span></u> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǵ<EFBFBD><span
|
||
lang=EN-US>91.12.1</span><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><span lang=EN-US> - </span><EFBFBD>ڳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ʊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƺ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD>ij<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD>Ǻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ױ<EFBFBD><EFBFBD>Ƶ<EFBFBD><span
|
||
lang=EN-US> - Linus</span></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>11</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>12</span></u> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>13</span></u> <b><i> *
|
||
Ok, demand-loading was easy, shared pages a little bit tricker. Shared</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>14</span></u> <b><i> *
|
||
pages started 02.12.91, seems to work. - Linus.</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>15</span></u> <b><i> *</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>16</span></u> <b><i> *
|
||
Tested sharing by executing about 30 /bin/sh: under the old kernel it</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>17</span></u> <b><i> *
|
||
would have taken more than the 6M I have free, but it worked well as</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>18</span></u> <b><i> *
|
||
far as I could see.</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>19</span></u> <b><i> *</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>20</span></u> <b><i> *
|
||
Also corrected some "invalidate()"s - I wasn't doing enough of them.</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>21</span></u> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * OK</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>DZȽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ױ<EFBFBD>д<EFBFBD>ģ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ȴ<EFBFBD><EFBFBD>Ҫ<EFBFBD>е㼼<EFBFBD>ɡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * 91.12.2</span><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>д<EFBFBD>ģ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US> - Linus</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> *</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span>ͨ<EFBFBD><EFBFBD>ִ<EFBFBD>д<EFBFBD>Լ<span
|
||
lang=EN-US>30</span><EFBFBD><EFBFBD><span lang=EN-US>/bin/sh</span><EFBFBD>Թ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˲<EFBFBD><EFBFBD>ԣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫռ<EFBFBD>ö<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * 6M</span><EFBFBD><EFBFBD><EFBFBD>ڴ棬<EFBFBD><EFBFBD>Ŀǰȴ<EFBFBD><EFBFBD><EFBFBD>á<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>úܺá<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> *</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>"invalidate()"</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US> - </span><EFBFBD><EFBFBD><EFBFBD>ⷽ<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>IJ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>22</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>23</span></u> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>24</span></u> <b><i> *
|
||
Real VM (paging to/from disk) started 18.12.91. Much more work and</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>25</span></u> <b><i> *
|
||
thought has to go into this. Oh, well..</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>26</span></u> <b><i> *
|
||
19.12.91 - works, somewhat. Sometimes I get faults, don't know why.</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>27</span></u> <b><i> *
|
||
Found it. Everything seems to work now.</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>28</span></u> <b><i> *
|
||
20.12.91 - Ok, making the swap-device changeable like the root.</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>29</span></u> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * 91.12.18</span><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>VM</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>浽<span lang=EN-US>/</span><EFBFBD>Ӵ<EFBFBD><EFBFBD>̣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD>Դ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD>Ǻܶಢ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD>ܶ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǻǣ<EFBFBD>Ҳֻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ˡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * 91.12.19 - </span><EFBFBD><EFBFBD>ij<EFBFBD>̶ֳ<EFBFBD><EFBFBD>Ͽ<EFBFBD><EFBFBD>Թ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ˣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֪<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD>¡<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US>
|
||
*
|
||
</span><EFBFBD>ҵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ˣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD>ж<EFBFBD><EFBFBD>ܹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ˡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * 91.12.20 -
|
||
OK</span><EFBFBD><EFBFBD><EFBFBD>ѽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>ijɿɸ<EFBFBD><EFBFBD>ĵ<EFBFBD><EFBFBD>ˣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>30</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>31</span></u>
|
||
#include <signal.h> // </span><EFBFBD>ź<EFBFBD>ͷ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>źŷ<EFBFBD><EFBFBD>ų<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>źŽṹ<EFBFBD><EFBFBD><EFBFBD>źź<EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD>͡<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>32</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>33</span></u>
|
||
#include <asm/system.h> // </span>ϵͳͷ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>/</span><EFBFBD>ж<EFBFBD><EFBFBD>ŵ<EFBFBD>Ƕ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ꡣ</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>34</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>35</span></u>
|
||
#include <linux/sched.h> // </span><EFBFBD><EFBFBD><EFBFBD>ȳ<EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ṹ<span lang=EN-US>task_struct</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>36</span></u>
|
||
#include <linux/head.h> // head</span>ͷ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļṹ<EFBFBD><EFBFBD><EFBFBD>ͼ<EFBFBD><EFBFBD><EFBFBD>ѡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>37</span></u>
|
||
#include <linux/kernel.h> // </span><EFBFBD>ں<EFBFBD>ͷ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һЩ<EFBFBD>ں˳<EFBFBD><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD>ζ<EFBFBD><EFBFBD>塣</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>38</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // CODE_SPACE(addr) ((((addr)+0xfff)&~0xfff)<current->start_code+current->end_code)</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>жϸ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD>Ƿ<EFBFBD>λ<EFBFBD>ڵ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD>̵Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>(((addr)+4095)&~4095)</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<span
|
||
lang=EN-US>addr</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ĩ<EFBFBD>˵<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD>μ<EFBFBD><span lang=EN-US>265</span><EFBFBD>С<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>39</span></u>
|
||
#define <u><span style='color:blue'>CODE_SPACE</span></u>(addr)
|
||
((((addr)+4095)&~4095) < \</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>40</span></u> <u><span
|
||
style='color:blue'>current</span></u>->start_code + <u><span
|
||
style='color:blue'>current</span></u>->end_code)</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>41</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>42</span></u>
|
||
unsigned long <u><span style='color:blue'>HIGH_MEMORY</span></u> = 0;
|
||
// </span>ȫ<EFBFBD>ֱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>߶˵<EFBFBD>ַ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>43</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>from</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1</span>ҳ<EFBFBD>ڴ浽<span lang=EN-US>to</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>4K</span><EFBFBD>ֽڣ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>44</span></u>
|
||
#define <u><span style='color:blue'>copy_page</span></u>(from,to) \</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>45</span></u>
|
||
__asm__(<i>"cld ; rep ; movsl"</i>::<i>"S"</i> (from),<i>"D"</i>
|
||
(to),<i>"c"</i> (1024):<i>"cx"</i>,<i>"di"</i>,<i>"si"</i>)</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>46</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD>ֽ<EFBFBD>ͼ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD>ֽڴ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>1</span>ҳ<EFBFBD>ڴ棩<EFBFBD><EFBFBD>ÿ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD>ֽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڱ<EFBFBD>־ҳ<EFBFBD>浱ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ռ<EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>15Mb</span><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ռ䡣<EFBFBD>ڳ<EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>mem_init()</span><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD>þ<EFBFBD><EFBFBD><EFBFBD>Ԥ<EFBFBD>ȱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ó<EFBFBD><span
|
||
lang=EN-US>USED</span><EFBFBD><EFBFBD><span lang=EN-US>100</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>47</span></u>
|
||
unsigned char <u><span style='color:blue'>mem_map</span></u> [ <u><span
|
||
style='color:blue'>PAGING_PAGES</span></u> ] = {0,};</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>48</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>49</span></u> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>50</span></u> <b><i> *
|
||
Free a page of memory at physical address 'addr'. Used by</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>51</span></u> <b><i> *
|
||
'free_page_tables()'</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>52</span></u> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD>ͷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span
|
||
lang=EN-US>'addr'</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һҳ<EFBFBD>ڴ档<EFBFBD><EFBFBD><EFBFBD>ں<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>'free_page_tables()'</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD>ͷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span
|
||
lang=EN-US>addr</span><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><span lang=EN-US>1</span>ҳ<EFBFBD><EFBFBD><EFBFBD>ڴ档</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span lang=EN-US>1MB</span><EFBFBD><EFBFBD><EFBFBD>µ<EFBFBD><EFBFBD>ڴ<EFBFBD>ռ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں˳<EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD>壬<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ռ䡣<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>addr</span><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1MB</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>53</span></u>
|
||
void <u><span style='color:blue'>free_page</span></u>(unsigned long addr)</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>54</span></u> {</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>жϲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span
|
||
lang=EN-US>addr</span><EFBFBD>ĺ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span lang=EN-US>addr</span>С<EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>Ͷˣ<EFBFBD><span
|
||
lang=EN-US>1MB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD>ں˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><EFBFBD>Դ˲<EFBFBD><EFBFBD>账<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span
|
||
lang=EN-US>addr >= </span>ϵͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>߶ˣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں<EFBFBD>ֹͣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>55</span></u>
|
||
if (addr < <u><span style='color:blue'>LOW_MEM</span></u>) return;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>56</span></u>
|
||
if (addr >= <u><span style='color:blue'>HIGH_MEMORY</span></u>)</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>57</span></u>
|
||
<u><span style='color:blue'>panic</span></u>(<i>"trying to free
|
||
nonexistent page"</i>);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Բ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>addr</span><EFBFBD><EFBFBD>֤ͨ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>Ͷ˿<EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ҳ<EFBFBD><EFBFBD>š<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US> = (addr <20>C LOW_MEM)/4096</span><EFBFBD><EFBFBD><EFBFBD>ɼ<EFBFBD>ҳ<EFBFBD><EFBFBD>Ŵ<EFBFBD><span lang=EN-US>0</span><EFBFBD>ſ<EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD>𡣴<EFBFBD>ʱ<span
|
||
lang=EN-US>addr</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>š<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>Ŷ<EFBFBD>Ӧ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD>ֽڲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD>ء<EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ֽ<EFBFBD>ֵӦ<EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷš<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧҳ<EFBFBD><EFBFBD><EFBFBD>ֽ<EFBFBD>ԭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>汾<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ǿ<EFBFBD><EFBFBD>еģ<EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD>ں˴<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>⡣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD>ͣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>58</span></u>
|
||
addr -= <u><span style='color:blue'>LOW_MEM</span></u>;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>59</span></u>
|
||
addr >>= 12;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>60</span></u>
|
||
if (<u><span style='color:blue'>mem_map</span></u>[addr]--) return;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>61</span></u>
|
||
<u><span style='color:blue'>mem_map</span></u>[addr]=0;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>62</span></u>
|
||
<u><span style='color:blue'>panic</span></u>(<i>"trying to free free
|
||
page"</i>);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>63</span></u> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>64</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>65</span></u> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>66</span></u> <b><i> *
|
||
This function frees a continuos block of page tables, as needed</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>67</span></u> <b><i> *
|
||
by 'exit()'. As does copy_page_tables(), this handles only 4Mb blocks.</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>68</span></u> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD>溯<EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>飬<span
|
||
lang=EN-US>'exit()'</span><EFBFBD><EFBFBD>Ҫ<EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>copy_page_tables()</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD>ƣ<EFBFBD><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>4Mb</span><EFBFBD><EFBFBD><EFBFBD>ȵ<EFBFBD><EFBFBD>ڴ<EFBFBD>顣</p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷŶ<EFBFBD>Ӧ<EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>鲢<EFBFBD>ñ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ҳĿ¼λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>1024</span><EFBFBD>ÿ<EFBFBD><EFBFBD><span lang=EN-US>4</span><EFBFBD>ֽڣ<EFBFBD><EFBFBD><EFBFBD>ռ<span
|
||
lang=EN-US>4K</span><EFBFBD>ֽڡ<EFBFBD>ÿ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>һ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span
|
||
lang=EN-US>0x1000</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD>ռ䣩<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>4</span><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ÿ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // 1024</span><EFBFBD>ÿ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>4</span><EFBFBD>ֽڡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳռ<span lang=EN-US>4K</span><EFBFBD><EFBFBD><span lang=EN-US>1</span>ҳ<EFBFBD><EFBFBD><EFBFBD>ڴ档<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں˴<EFBFBD><EFBFBD><EFBFBD><EFBFBD>еĽ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD>ݵ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ڽ<EFBFBD><EFBFBD>̱<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD>ں<EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD>ÿ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<span
|
||
lang=EN-US>1</span>ҳ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ棬<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>4MB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ档</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>from
|
||
- </span><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD>Ի<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><span lang=EN-US>size - </span><EFBFBD>ͷŵ<EFBFBD><EFBFBD>ֽڳ<EFBFBD><EFBFBD>ȡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>69</span></u> int
|
||
<u><span style='color:blue'>free_page_tables</span></u>(unsigned long
|
||
from,unsigned long size)</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>70</span></u> {</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>71</span></u>
|
||
unsigned long *pg_table;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>72</span></u>
|
||
unsigned long * dir, nr;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>73</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>from</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ի<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>4MB</span><EFBFBD>ı߽紦<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD>ܴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>from
|
||
= 0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͼ<EFBFBD>ͷ<EFBFBD><EFBFBD>ں˺ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD>ռ䡣</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>74</span></u>
|
||
if (from & 0x3fffff)</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>75</span></u>
|
||
<u><span style='color:blue'>panic</span></u>(<i>"free_page_tables called
|
||
with wrong alignment"</i>);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>76</span></u>
|
||
if (!from)</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>77</span></u>
|
||
<u><span style='color:blue'>panic</span></u>(<i>"Trying to free up swapper
|
||
memory space"</i>);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>size</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ij<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD><EFBFBD>ҳĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>4MB</span><EFBFBD>Ľ<EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>Ϊ<span lang=EN-US>1</span><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>4MB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ棬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>22</span>λ<EFBFBD>ķ<EFBFBD>ʽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD><EFBFBD>ڴ泤<EFBFBD><EFBFBD>ֵ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>4MB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>м<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0x3fffff</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>4Mb -1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڵõ<EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>磬<EFBFBD><EFBFBD><EFBFBD>ԭ<span
|
||
lang=EN-US>size = 4.01Mb</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD>ɵõ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>size = 2</span><EFBFBD><EFBFBD> <20><><EFBFBD>ż<EFBFBD><C5BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼĿ¼<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US> = from >> 22</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊÿ<EFBFBD><EFBFBD>ռ<span lang=EN-US>4</span><EFBFBD>ֽڣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ҳĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>ţ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><span lang=EN-US> = </span>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US><<2</span><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><span lang=EN-US>(from>>20)</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // <20><></span><EFBFBD><EFBFBD><span lang=EN-US><EFBFBD><EFBFBD></span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0xffc</span>ȷ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ָ<EFBFBD>뷶Χ<EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>78</span></u>
|
||
size = (size + 0x3fffff) >> 22;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>79</span></u>
|
||
dir = (unsigned long *) ((from>>20) & 0xffc); <b><i>/* _pg_dir = 0 */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ʱ<span lang=EN-US>
|
||
size </span><EFBFBD><EFBFBD><EFBFBD>ͷŵ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>dir</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼĿ¼<EFBFBD><EFBFBD>ָ<EFBFBD>롣<EFBFBD><EFBFBD><EFBFBD>ڿ<EFBFBD>ʼѭ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD>ÿ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>е<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD><span
|
||
lang=EN-US>P</span>λ<span lang=EN-US>=0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ŀ¼<EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>ʹ<EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span lang=EN-US>
|
||
pg_table</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ը<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><span lang=EN-US> 1024 </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD><EFBFBD>Чҳ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>P</span>λ<span lang=EN-US>=1</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD>棬<EFBFBD><EFBFBD><EFBFBD>ߴӽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD><EFBFBD>Чҳ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>P</span>λ<span lang=EN-US>=0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>ҳ<EFBFBD>棬<EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>ж<EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD>棨<EFBFBD><EFBFBD>Ϊҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD>Ѹ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>б<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ͼ<EFBFBD><EFBFBD>ͷŸ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD>ݵ<EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD>棬</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һҳĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ˢ<EFBFBD><EFBFBD>ҳ<EFBFBD>任<EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD>壬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>80</span></u>
|
||
for ( ; size-->0 ; dir++) {</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>81</span></u>
|
||
if (!(1 & *dir))</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>82</span></u>
|
||
continue;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>83</span></u>
|
||
pg_table = (unsigned long *) (0xfffff000 & *dir); // </span>ȡҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>84</span></u>
|
||
for (nr=0 ; nr<1024 ; nr++) {</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>85</span></u>
|
||
if (*pg_table) {
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݲ<EFBFBD>Ϊ<span lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>86</span></u>
|
||
if (1 & *pg_table) // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷŶ<EFBFBD>Ӧҳ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>87</span></u>
|
||
<u><span style='color:blue'>free_page</span></u>(0xfffff000 & *pg_table);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>88</span></u>
|
||
else
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷŽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>ж<EFBFBD>Ӧҳ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>89</span></u>
|
||
<u><span style='color:blue'>swap_free</span></u>(*pg_table >> 1);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>90</span></u>
|
||
*pg_table = 0; // </span><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>㡣</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>91</span></u>
|
||
}</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>92</span></u>
|
||
pg_table++;
|
||
// </span>ָ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>93</span></u>
|
||
}</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>94</span></u>
|
||
<u><span style='color:blue'>free_page</span></u>(0xfffff000 & *dir);
|
||
// </span><EFBFBD>ͷŸ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD>档</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>95</span></u>
|
||
*dir = 0;
|
||
// </span><EFBFBD><EFBFBD>Ӧҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>㡣</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>96</span></u>
|
||
}</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>97</span></u>
|
||
<u><span style='color:blue'>invalidate</span></u>();
|
||
// </span>ˢ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>CPU</span>ҳ<EFBFBD>任<EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD>塣</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>98</span></u>
|
||
return 0;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>99</span></u> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>100</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>101</span></u><span
|
||
lang=EN-US> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>102</span></u><span
|
||
lang=EN-US> <b><i> * Well, here is one of the most complicated
|
||
functions in mm. It</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>103</span></u><span
|
||
lang=EN-US> <b><i> * copies a range of linerar addresses by copying only
|
||
the pages.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>104</span></u><span
|
||
lang=EN-US> <b><i> * Let's hope this is bug-free, 'cause this one I don't
|
||
want to debug :-)</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>105</span></u><span
|
||
lang=EN-US> <b><i> *</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>106</span></u><span
|
||
lang=EN-US> <b><i> * Note! We don't copy just any chunks of memory -
|
||
addresses have to</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>107</span></u><span
|
||
lang=EN-US> <b><i> * be divisible by 4Mb (one page-directory entry), as
|
||
this makes the</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>108</span></u><span
|
||
lang=EN-US> <b><i> * function easier. It's used only by fork anyway.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>109</span></u><span
|
||
lang=EN-US> <b><i> *</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>110</span></u><span
|
||
lang=EN-US> <b><i> * NOTE 2!! When from==0 we are copying kernel space for
|
||
the first</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>111</span></u><span
|
||
lang=EN-US> <b><i> * fork(). Then we DONT want to copy a full
|
||
page-directory entry, as</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>112</span></u><span
|
||
lang=EN-US> <b><i> * that would lead to some serious memory waste - we
|
||
just copy the</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>113</span></u><span
|
||
lang=EN-US> <b><i> * first 160 pages - 640kB. Even that is more than we
|
||
need, but it</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>114</span></u><span
|
||
lang=EN-US> <b><i> * doesn't take any more memory - we don't copy-on-write
|
||
in the low</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>115</span></u><span
|
||
lang=EN-US> <b><i> * 1 Mb-range, so the pages can be shared with the
|
||
kernel. Thus the</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>116</span></u><span
|
||
lang=EN-US> <b><i> * special case for nr=xxxx.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>117</span></u><span
|
||
lang=EN-US> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD>ˣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>mm</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD>ӵij<EFBFBD><EFBFBD><EFBFBD>֮һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͨ<EFBFBD><EFBFBD>ֻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Χ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݡ<EFBFBD>
|
||
ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD>ٵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>:-)</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> *</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span>ע<EFBFBD>⣡<EFBFBD><EFBFBD><EFBFBD>Dz<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>κ<EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><span
|
||
lang=EN-US> - </span><EFBFBD>ڴ<EFBFBD><EFBFBD>ĵ<EFBFBD>ַ<EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><span lang=EN-US>4Mb</span><EFBFBD>ı<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span>һ<EFBFBD><EFBFBD>ҳĿ¼<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD>ڴ泤<EFBFBD>ȣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܼ<EFBFBD>
|
||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>fork()</span>ʹ<EFBFBD>á<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> *</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span>ע<EFBFBD><EFBFBD><span
|
||
lang=EN-US>2</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><span lang=EN-US>from==0</span>ʱ<EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>fork()</span><EFBFBD><EFBFBD><EFBFBD>ø<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں˿ռ䡣</p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD>ǾͲ<EFBFBD><EFBFBD>븴<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳĿ¼<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD>ڴ棬<EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ᵼ<EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD>˷<EFBFBD><span
|
||
lang=EN-US> - </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD>븴<EFBFBD>ƿ<EFBFBD>ͷ<span lang=EN-US>160</span><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><span lang=EN-US> - </span><EFBFBD><EFBFBD>Ӧ<span
|
||
lang=EN-US> 640kB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>Ǹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Щ</p>
|
||
|
||
<p class=a><span lang=EN-US> * </span>ҳ<EFBFBD><EFBFBD>Ҳ<EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ⲻ<EFBFBD><EFBFBD>ռ<EFBFBD>ø<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><span
|
||
lang=EN-US> - </span><EFBFBD>ڵ<EFBFBD><span lang=EN-US> 1Mb </span><EFBFBD>ڴ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD>Χ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Dz<EFBFBD>ִ<EFBFBD><EFBFBD>дʱ<EFBFBD><EFBFBD><EFBFBD>Ʋ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Щҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں˹<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>nr=xxxx</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>nr</span><EFBFBD>ڳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>ҳĿ¼<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD>ҳĿ¼<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ԭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>á<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ԭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˺<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̺<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӽ<EFBFBD><EFBFBD>̣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD>ں˲Ż<EFBFBD>Ϊд<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̷<EFBFBD><EFBFBD><EFBFBD><EFBFBD>µ<EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD>дʱ<EFBFBD><EFBFBD><EFBFBD>ƻ<EFBFBD><EFBFBD>ƣ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>from</span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>to </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD><EFBFBD><span lang=EN-US>size</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD>ƣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ泤<EFBFBD>ȣ<EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD>ֽڡ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>118</span></u><span
|
||
lang=EN-US> int <u><span style='color:blue'>copy_page_tables</span></u>(unsigned
|
||
long from,unsigned long to,long size)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>119</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>120</span></u><span
|
||
lang=EN-US> unsigned long *
|
||
from_page_table;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>121</span></u><span
|
||
lang=EN-US> unsigned long *
|
||
to_page_table;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>122</span></u><span
|
||
lang=EN-US> unsigned long
|
||
this_page;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>123</span></u><span
|
||
lang=EN-US> unsigned long *
|
||
from_dir, * to_dir;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>124</span></u><span
|
||
lang=EN-US> unsigned long
|
||
new_page;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>125</span></u><span
|
||
lang=EN-US> unsigned long nr;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>126</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Դ<EFBFBD><EFBFBD>ַ<span
|
||
lang=EN-US>from</span><EFBFBD><EFBFBD>Ŀ<EFBFBD>ĵ<EFBFBD>ַ<span lang=EN-US>to</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD>ԡ<EFBFBD>Դ<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD>Ŀ<EFBFBD>ĵ<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>4Mb</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ڴ<EFBFBD>߽<EFBFBD><EFBFBD>ַ<EFBFBD>ϡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊһ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1024</span><EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>4Mb</span><EFBFBD>ڴ档</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Դ<EFBFBD><EFBFBD>ַ <span lang=EN-US>from
|
||
</span><EFBFBD><EFBFBD>Ŀ<EFBFBD>ĵ<EFBFBD>ַ <span lang=EN-US>to </span>ֻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܱ<EFBFBD>֤<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ĵ<EFBFBD><span lang=EN-US>1</span><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD>ġ<EFBFBD><span
|
||
lang=EN-US> </span>Ȼ<EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD>Դ<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD>Ŀ<EFBFBD>ĵ<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼĿ¼<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>from_dir</span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>to_dir</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٸ<EFBFBD><EFBFBD>ݲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ij<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>size</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>ռ<EFBFBD>õ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>μ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>78</span><EFBFBD><EFBFBD><span lang=EN-US>79</span><EFBFBD>еĽ<EFBFBD><EFBFBD>͡<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>127</span></u><span
|
||
lang=EN-US> if
|
||
((from&0x3fffff) || (to&0x3fffff))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>128</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>panic</span></u>(<i>"copy_page_tables called
|
||
with wrong alignment"</i>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>129</span></u><span
|
||
lang=EN-US> from_dir =
|
||
(unsigned long *) ((from>>20) & 0xffc); <b><i>/* _pg_dir = 0 */</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>130</span></u><span
|
||
lang=EN-US> to_dir = (unsigned
|
||
long *) ((to>>20) & 0xffc);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>131</span></u><span
|
||
lang=EN-US> size = ((unsigned)
|
||
(size+0x3fffff)) >> 22;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ڵõ<EFBFBD><EFBFBD><EFBFBD>Դ<EFBFBD><EFBFBD>ʼĿ¼<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>from_dir</span><EFBFBD><EFBFBD>Ŀ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼĿ¼<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><span lang=EN-US>to_dir</span><EFBFBD>Լ<EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD>ҳ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>
|
||
size </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>濪ʼ<EFBFBD><EFBFBD>ÿ<EFBFBD><EFBFBD>ҳĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>1</span>ҳ<EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҿ<EFBFBD>ʼ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ʋ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڣ<EFBFBD><span
|
||
lang=EN-US>P=1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD>ԴĿ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڣ<EFBFBD><span
|
||
lang=EN-US>P=0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>ҳĿ¼<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>132</span></u><span
|
||
lang=EN-US> for( ; size-->0
|
||
; from_dir++,to_dir++) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>133</span></u><span
|
||
lang=EN-US>
|
||
if (1 & *to_dir)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>134</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>panic</span></u>(<i>"copy_page_tables: already
|
||
exist"</i>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>135</span></u><span
|
||
lang=EN-US> if
|
||
(!(1 & *from_dir))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>136</span></u><span
|
||
lang=EN-US>
|
||
continue;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֤<EFBFBD>˵<EFBFBD>ǰԴĿ¼<EFBFBD><EFBFBD><EFBFBD>Ŀ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֮<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡԴĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span
|
||
lang=EN-US>from_page_table</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ϊ<EFBFBD>˱<EFBFBD><EFBFBD><EFBFBD>Ŀ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1</span>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>get_free_page()
|
||
</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>뵽<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD>棬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ治<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>-1</span>ֵ<EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>137</span></u><span
|
||
lang=EN-US> from_page_table
|
||
= (unsigned long *) (0xfffff000 & *from_dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>138</span></u><span
|
||
lang=EN-US>
|
||
if (!(to_page_table = (unsigned long *) <u><span style='color:blue'>get_free_page</span></u>()))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>139</span></u><span
|
||
lang=EN-US>
|
||
return -1; <b><i>/* Out of memory, see freeing */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>3</span>λ<EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰĿ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>7</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD>Ӧ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ҳ<EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҿɶ<EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڣ<EFBFBD><span
|
||
lang=EN-US>Usr, R/W, Present</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>U/S</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>λ<EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>R/W</span><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>á<EFBFBD><EFBFBD><EFBFBD><EFBFBD> <span lang=EN-US>U/S</span><EFBFBD><EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US> R/W</span><EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ҳ<EFBFBD>档<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>U/S</span><EFBFBD><EFBFBD><span lang=EN-US>R/W</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD>д<EFBFBD><EFBFBD>Ȩ<EFBFBD>ޣ<EFBFBD><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳĿ¼<EFBFBD><EFBFBD><EFBFBD>Ӧ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں˿ռ䣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD>踴<EFBFBD><EFBFBD>ͷ<span
|
||
lang=EN-US>160</span>ҳ<EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>nr=
|
||
160</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD>ڿ<EFBFBD>ʼ<span lang=EN-US>640KB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ档<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1024</span><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>nr=
|
||
1024</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD><span lang=EN-US>4MB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ档</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>140</span></u><span
|
||
lang=EN-US>
|
||
*to_dir = ((unsigned long) to_page_table) | 7;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>141</span></u><span
|
||
lang=EN-US>
|
||
nr = (from==0)?0xA0:1024;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD>ڵ<EFBFBD>ǰҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼѭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>nr</span><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD>Դҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ǰԴҳ<EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>ʹ<EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ø<EFBFBD><EFBFBD>Ƹñ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>142</span></u><span
|
||
lang=EN-US>
|
||
for ( ; nr-- > 0 ; from_page_table++,to_page_table++) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>143</span></u><span
|
||
lang=EN-US>
|
||
this_page = *from_page_table;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>144</span></u><span
|
||
lang=EN-US>
|
||
if (!this_page)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>145</span></u><span
|
||
lang=EN-US>
|
||
continue;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ñ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<span
|
||
lang=EN-US>P=0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ñ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>1</span>ҳ<EFBFBD>ڴ棬<EFBFBD><EFBFBD><EFBFBD>ӽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>棨<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD><EFBFBD>еĻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ŀ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Դҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ñ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>־Ϊ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ࡱ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>7</span><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
||
<span lang=EN-US>R/W </span><EFBFBD><EFBFBD>־<EFBFBD><EFBFBD>λ<span lang=EN-US>1</span><EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD>ֻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD>Ŀ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>С<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>146</span></u><span
|
||
lang=EN-US>
|
||
if (!(1 & this_page)) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>147</span></u><span
|
||
lang=EN-US>
|
||
if (!(new_page = <u><span style='color:blue'>get_free_page</span></u>()))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>148</span></u><span
|
||
lang=EN-US>
|
||
return -1;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>149</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>read_swap_page</span></u>(this_page>>1, (char
|
||
*) new_page);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>150</span></u><span
|
||
lang=EN-US>
|
||
*to_page_table
|
||
= this_page;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>151</span></u><span
|
||
lang=EN-US>
|
||
*from_page_table = new_page | (<u><span style='color:blue'>PAGE_DIRTY</span></u>
|
||
| 7);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>152</span></u><span
|
||
lang=EN-US>
|
||
continue;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>153</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>154</span></u><span
|
||
lang=EN-US>
|
||
this_page &= ~2;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>155</span></u><span
|
||
lang=EN-US> *to_page_table
|
||
= this_page;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ĵ<EFBFBD>ַ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>1MB</span><EFBFBD><EFBFBD><EFBFBD>ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>mem_map[]</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>Ǽ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ţ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>1MB</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>µ<EFBFBD>ҳ<EFBFBD>棬˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں<EFBFBD>ҳ<EFBFBD>棬<EFBFBD><EFBFBD>˲<EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>mem_map[]</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>á<EFBFBD><EFBFBD><EFBFBD>Ϊ <span lang=EN-US>mem_map[]</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ڹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD>ҳ<EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><>˶<EFBFBD><CBB6><EFBFBD><EFBFBD>ں<EFBFBD><DABA>ƶ<EFBFBD><C6B6><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD>в<EFBFBD><EFBFBD>ҵ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>fork()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>1</span>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>init()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD>ҳ<EFBFBD>滹<EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں˴<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ж<EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD>䲻<EFBFBD><EFBFBD>ִ<EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0 </span><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>д<EFBFBD><EFBFBD>ֻ<EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <span lang=EN-US>fork() </span><EFBFBD>ĸ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>봦<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>λ<EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1MB</span><EFBFBD><EFBFBD>ʱ<EFBFBD>Ż<EFBFBD>ִ<EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD>ڽ<EFBFBD><EFBFBD>̵<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>execve()</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>װ<EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>³<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD>Ż<EFBFBD><EFBFBD><EFBFBD>֡<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // 157</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>京<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Դҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>ڴ<EFBFBD>ҳҲΪֻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD>ڿ<EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̹<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ˡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͨ<EFBFBD><EFBFBD>ҳ<EFBFBD>쳣д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊִ<EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ľ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>̷<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>1</span>ҳ<EFBFBD>¿<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>棬Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>дʱ<EFBFBD><EFBFBD><EFBFBD>ƣ<EFBFBD><span
|
||
lang=EN-US>copy on write</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>156</span></u><span
|
||
lang=EN-US>
|
||
if (this_page > <u><span style='color:blue'>LOW_MEM</span></u>) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>157</span></u><span
|
||
lang=EN-US>
|
||
*from_page_table = this_page; // </span><EFBFBD><EFBFBD>Դҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳֻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>158</span></u><span
|
||
lang=EN-US>
|
||
this_page -= <u><span style='color:blue'>LOW_MEM</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>159</span></u><span
|
||
lang=EN-US>
|
||
this_page >>= 12;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>160</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>mem_map</span></u>[this_page]++;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>161</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>162</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>163</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>164</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>invalidate</span></u>();
|
||
// </span>ˢ<EFBFBD><EFBFBD>ҳ<EFBFBD>任<EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD>塣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>165</span></u><span
|
||
lang=EN-US> return 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>166</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>167</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>168</span></u><span
|
||
lang=EN-US> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>169</span></u><span
|
||
lang=EN-US> <b><i> * This function puts a page in memory at the wanted
|
||
address.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>170</span></u><span
|
||
lang=EN-US> <b><i> * It returns the physical address of the page gotten, 0
|
||
if</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>171</span></u><span
|
||
lang=EN-US> <b><i> * out of memory (either when trying to access
|
||
page-table or</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>172</span></u><span
|
||
lang=EN-US> <b><i> * page.)</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>173</span></u><span
|
||
lang=EN-US> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD>溯<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ã<EFBFBD>ӳ<EFBFBD>䣩<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ治<EFBFBD><EFBFBD><span
|
||
lang=EN-US>(</span><EFBFBD>ڷ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ʱ<span lang=EN-US>)</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD>ӳ<EFBFBD>䵽<EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD>ռ<EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD>ռ<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span
|
||
lang=EN-US>address</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ӳ<EFBFBD>䵽<EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><span lang=EN-US>page</span><EFBFBD>ϡ<EFBFBD><EFBFBD><EFBFBD>Ҫ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳĿ¼<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD>
|
||
<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȱҳ<EFBFBD>쳣<EFBFBD><EFBFBD><span
|
||
lang=EN-US>C</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>do_no_page() </span><EFBFBD>л<EFBFBD><EFBFBD><EFBFBD>ô˺<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȱҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>쳣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>κ<EFBFBD>ȱ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ҳԵ<EFBFBD>ʶ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫˢ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>CPU</span><EFBFBD><EFBFBD>ҳ<EFBFBD>任<EFBFBD><EFBFBD><EFBFBD>壨<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>Translation Lookaside</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // Buffer - TLB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>б<EFBFBD>־<span
|
||
lang=EN-US>P</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD>ij<EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>Чҳ<EFBFBD><EFBFBD>ᱻ<EFBFBD><EFBFBD><EFBFBD>壬<EFBFBD><EFBFBD>˵<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫˢ<EFBFBD>¡<EFBFBD><EFBFBD>ڴ˾ͱ<EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>Invalidate()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>page</span><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ijһҳ<EFBFBD>棨ҳ֡<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ָ<EFBFBD>룻<span
|
||
lang=EN-US>address</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>174</span></u><span
|
||
lang=EN-US> static unsigned long <u><span style='color:blue'>put_page</span></u>(unsigned
|
||
long page,unsigned long address)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>175</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>176</span></u><span
|
||
lang=EN-US> unsigned long tmp,
|
||
*page_table;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>177</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>178</span></u><span
|
||
lang=EN-US> <b><i>/* NOTE !!! This uses the fact that _pg_dir=0 */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /* </span>ע<EFBFBD><EFBFBD><span lang=EN-US>!!!
|
||
</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span lang=EN-US>_pg_dir=0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>179</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>жϲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>page </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD>ԡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>λ<EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>LOW_MEM</span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1MB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϵͳʵ<EFBFBD>ʺ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>߶<EFBFBD> <span
|
||
lang=EN-US>HIGH_MEMORY</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>档<span lang=EN-US>LOW_MEM </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>С<EFBFBD><EFBFBD>ʼλ<EFBFBD>á<EFBFBD><EFBFBD><EFBFBD>ϵͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>С<EFBFBD>ڻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>6MB</span>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><span lang=EN-US>LOW_MEM</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٲ鿴һ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>¸<EFBFBD><span lang=EN-US>
|
||
page</span>ҳ<EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>棬<EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD>ֽ<EFBFBD>ͼ<span lang=EN-US> mem_map[]</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ӧ<EFBFBD>ֽ<EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>跢<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>档</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>180</span></u><span
|
||
lang=EN-US> if (page < <u><span
|
||
style='color:blue'>LOW_MEM</span></u> || page >= <u><span style='color:blue'>HIGH_MEMORY</span></u>)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>181</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>printk</span></u>(<i>"Trying to put page %p at
|
||
%p\n"</i>,page,address);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>182</span></u><span
|
||
lang=EN-US> if (<u><span
|
||
style='color:blue'>mem_map</span></u>[(page-<u><span style='color:blue'>LOW_MEM</span></u>)>>12]
|
||
!= 1)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>183</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>printk</span></u>(<i>"mem_map disagrees with
|
||
%p at %p\n"</i>,page,address);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݲ<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<span
|
||
lang=EN-US>address</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳĿ¼<EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD>Ӧ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ָ<EFBFBD>룬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<C4BF><C2BC><EFBFBD><EFBFBD>Ч<EFBFBD><D0A7><span
|
||
lang=EN-US>P=1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ַ<EFBFBD>ŵ<EFBFBD><span lang=EN-US>page_table
|
||
</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ʹ<EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڶ<EFBFBD>ӦĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>־<EFBFBD><EFBFBD><span lang=EN-US>7 <20>C
|
||
User</span><EFBFBD><EFBFBD><span lang=EN-US>U/S</span><EFBFBD><EFBFBD><span lang=EN-US>R/W</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD>ŵ<EFBFBD><span
|
||
lang=EN-US>page_table</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>184</span></u><span
|
||
lang=EN-US> page_table =
|
||
(unsigned long *) ((address>>20) & 0xffc);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>185</span></u><span
|
||
lang=EN-US> if
|
||
((*page_table)&1)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>186</span></u><span
|
||
lang=EN-US>
|
||
page_table = (unsigned long *) (0xfffff000 & *page_table);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>187</span></u><span
|
||
lang=EN-US> else {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>188</span></u><span
|
||
lang=EN-US>
|
||
if (!(tmp=<u><span style='color:blue'>get_free_page</span></u>()))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>189</span></u><span
|
||
lang=EN-US>
|
||
return 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>190</span></u><span
|
||
lang=EN-US>
|
||
*page_table = tmp | 7;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>191</span></u><span
|
||
lang=EN-US>
|
||
page_table = (unsigned long *) tmp;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>192</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҵ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><span
|
||
lang=EN-US> page_table </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><span lang=EN-US>page</span><EFBFBD>ĵ<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ͬʱ<EFBFBD><EFBFBD>λ<span lang=EN-US>3</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>־<EFBFBD><EFBFBD><span
|
||
lang=EN-US>U/S</span><EFBFBD><EFBFBD><span lang=EN-US>W/R</span><EFBFBD><EFBFBD><span lang=EN-US>P</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַλ<span
|
||
lang=EN-US>21 --</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>λ<span lang=EN-US>12</span><EFBFBD><EFBFBD>ɵ<EFBFBD><span
|
||
lang=EN-US>10</span><EFBFBD><EFBFBD><EFBFBD>ص<EFBFBD>ֵ<EFBFBD><EFBFBD>ÿ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>1024</span><EFBFBD><span lang=EN-US>0
|
||
-- 0x3ff</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>193</span></u><span
|
||
lang=EN-US>
|
||
page_table[(address>>12) & 0x3ff] = page | 7;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>194</span></u><span
|
||
lang=EN-US> <b><i>/* no need for invalidate */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /* </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫˢ<EFBFBD><EFBFBD>ҳ<EFBFBD>任<EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US> */</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>195</span></u><span
|
||
lang=EN-US> return page;
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>196</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>197</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>198</span></u><span
|
||
lang=EN-US> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>199</span></u><span
|
||
lang=EN-US> <b><i> * The previous function doesn't work very well if you also
|
||
want to mark</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>200</span></u><span
|
||
lang=EN-US> <b><i> * the page dirty: exec.c wants this, as it has earlier
|
||
changed the page,</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>201</span></u><span
|
||
lang=EN-US> <b><i> * and we want the dirty-status to be correct (for VM).
|
||
Thus the same</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>202</span></u><span
|
||
lang=EN-US> <b><i> * routine, but this time we mark it dirty too.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>203</span></u><span
|
||
lang=EN-US> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ò<EFBFBD><EFBFBD>Ǻܺã<EFBFBD><span
|
||
lang=EN-US>exec.c</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>á<EFBFBD><EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>exec.c</span><EFBFBD>к<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڷ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>֮ǰ<EFBFBD>Ĺ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݡ<EFBFBD>Ϊ<EFBFBD><EFBFBD>ʵ</p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>VM</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>״̬<EFBFBD><EFBFBD>־<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD>ĺ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǹú<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڷ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>־Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>״̬<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĺ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD>ӳ<EFBFBD>䵽<EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD>ռ<EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>put_page()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȫһ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˱<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>223</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ͬʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD>λ<span
|
||
lang=EN-US>6</span><EFBFBD><EFBFBD><span lang=EN-US>PAGE_DIRTY</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>204</span></u><span
|
||
lang=EN-US> unsigned long <u><span style='color:blue'>put_dirty_page</span></u>(unsigned
|
||
long page, unsigned long address)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>205</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>206</span></u><span
|
||
lang=EN-US> unsigned long tmp,
|
||
*page_table;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>207</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>208</span></u><span
|
||
lang=EN-US> <b><i>/* NOTE !!! This uses the fact that _pg_dir=0 */</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>209</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>210</span></u><span
|
||
lang=EN-US> if (page < <u><span
|
||
style='color:blue'>LOW_MEM</span></u> || page >= <u><span style='color:blue'>HIGH_MEMORY</span></u>)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>211</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>printk</span></u>(<i>"Trying to put page %p at
|
||
%p\n"</i>,page,address);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>212</span></u><span
|
||
lang=EN-US> if (<u><span
|
||
style='color:blue'>mem_map</span></u>[(page-<u><span style='color:blue'>LOW_MEM</span></u>)>>12]
|
||
!= 1)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>213</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>printk</span></u>(<i>"mem_map disagrees with
|
||
%p at %p\n"</i>,page,address);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>214</span></u><span
|
||
lang=EN-US> page_table = (unsigned
|
||
long *) ((address>>20) & 0xffc);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>215</span></u><span
|
||
lang=EN-US> if
|
||
((*page_table)&1)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>216</span></u><span
|
||
lang=EN-US>
|
||
page_table = (unsigned long *) (0xfffff000 & *page_table);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>217</span></u><span
|
||
lang=EN-US> else {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>218</span></u><span
|
||
lang=EN-US>
|
||
if (!(tmp=<u><span style='color:blue'>get_free_page</span></u>()))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>219</span></u><span
|
||
lang=EN-US>
|
||
return 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>220</span></u><span
|
||
lang=EN-US>
|
||
*page_table = tmp|7;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>221</span></u><span
|
||
lang=EN-US>
|
||
page_table = (unsigned long *) tmp;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>222</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>223</span></u><span
|
||
lang=EN-US>
|
||
page_table[(address>>12) & 0x3ff] = page | (<u><span
|
||
style='color:blue'>PAGE_DIRTY</span></u> | 7);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>224</span></u><span
|
||
lang=EN-US> <b><i>/* no need for invalidate */</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>225</span></u><span
|
||
lang=EN-US> return page;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>226</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>227</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span>ȡ<EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>溯<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>쳣<EFBFBD>жϹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>쳣<EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>дʱ<EFBFBD><EFBFBD><EFBFBD>ƣ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ں˴<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD>½<EFBFBD><EFBFBD><EFBFBD><EFBFBD>븸<EFBFBD><EFBFBD><EFBFBD>̱<EFBFBD><EFBFBD><EFBFBD><EFBFBD>óɹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD>棬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Щҳ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ó<EFBFBD>ֻ<EFBFBD><EFBFBD>ҳ<EFBFBD>档<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>½<EFBFBD><EFBFBD>̻<EFBFBD>ԭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>CPU </span><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>쳣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں˾ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD>Ҫд<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>óɿ<EFBFBD>дȻ<EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>dz<EFBFBD><EFBFBD>ڹ<EFBFBD><EFBFBD><EFBFBD>״̬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>ҳ<EFBFBD>沢</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>Ʊ<EFBFBD>дҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݣ<EFBFBD><EFBFBD>Թ<EFBFBD>д<EFBFBD><EFBFBD><EFBFBD>̵<EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>á<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>룬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>[ un_wp_page -- Un-Write Protect Page]</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>228</span></u><span
|
||
lang=EN-US> void <u><span style='color:blue'>un_wp_page</span></u>(unsigned
|
||
long * table_entry)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>229</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>230</span></u><span
|
||
lang=EN-US> unsigned long
|
||
old_page,new_page;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>231</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>λ<EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>жϸ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD>ǹ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>档<EFBFBD><EFBFBD><EFBFBD>ԭ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ҳ<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>Ͷ<EFBFBD><span
|
||
lang=EN-US> LOW_MEM</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD>ֽ<EFBFBD>ͼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ֵΪ<span lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD>Σ<EFBFBD>ҳ<EFBFBD><EFBFBD>û<EFBFBD>б<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڸ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US> R/W </span><EFBFBD><EFBFBD>־</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ˢ<EFBFBD><EFBFBD>ҳ<EFBFBD>任<EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD>壬Ȼ<EFBFBD>ء<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ʱֻ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>ã<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں<EFBFBD><EFBFBD>еĽ<EFBFBD><EFBFBD>̣<EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD>Ӱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ը<EFBFBD>Ϊ<EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD>ɣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>档</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>232</span></u><span
|
||
lang=EN-US> old_page =
|
||
0xfffff000 & *table_entry; // </span>ȡָ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>233</span></u><span
|
||
lang=EN-US> if (old_page >= <u><span
|
||
style='color:blue'>LOW_MEM</span></u> && <u><span style='color:blue'>mem_map</span></u>[<u><span
|
||
style='color:blue'>MAP_NR</span></u>(old_page)]==1) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>234</span></u><span
|
||
lang=EN-US>
|
||
*table_entry |= 2;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>235</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>invalidate</span></u>();</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>236</span></u><span
|
||
lang=EN-US>
|
||
return;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>237</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ľ<EFBFBD><EFBFBD>̵<EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>ã<EFBFBD>ȡ<EFBFBD><EFBFBD>ҳ<EFBFBD>湲<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ԭҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>Ͷˣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ζ<EFBFBD><EFBFBD> <span
|
||
lang=EN-US>mem_map[] > 1</span><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ǹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭҳ<EFBFBD><EFBFBD><EFBFBD>ҳ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD>ֽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD>ݼ<EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݸ<EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ÿɶ<EFBFBD>д<EFBFBD>ȱ<EFBFBD>־</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>U/S</span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>R/W</span><EFBFBD><EFBFBD><span lang=EN-US>P</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ˢ<EFBFBD><EFBFBD>ҳ<EFBFBD>任<EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD>֮<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݸ<EFBFBD><EFBFBD>Ƶ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>档</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>238</span></u><span
|
||
lang=EN-US> if (!(new_page=<u><span
|
||
style='color:blue'>get_free_page</span></u>()))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>239</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>oom</span></u>();
|
||
// Out of Memory</span><EFBFBD><EFBFBD><EFBFBD>ڴ治<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>240</span></u><span
|
||
lang=EN-US> if (old_page >= <u><span
|
||
style='color:blue'>LOW_MEM</span></u>)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>241</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>mem_map</span></u>[<u><span style='color:blue'>MAP_NR</span></u>(old_page)]--;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>242</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>copy_page</span></u>(old_page,new_page);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>243</span></u><span
|
||
lang=EN-US> *table_entry =
|
||
new_page | 7;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>244</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>invalidate</span></u>();</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>245</span></u><span
|
||
lang=EN-US> } </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>246</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>247</span></u><span
|
||
lang=EN-US> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>248</span></u><span
|
||
lang=EN-US> <b><i> * This routine handles present pages, when users try to
|
||
write</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>249</span></u><span
|
||
lang=EN-US> <b><i> * to a shared page. It is done by copying the page to a
|
||
new address</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>250</span></u><span
|
||
lang=EN-US> <b><i> * and decrementing the shared-page counter for the old
|
||
page.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>251</span></u><span
|
||
lang=EN-US> <b><i> *</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>252</span></u><span
|
||
lang=EN-US> <b><i> * If it's in code space we exit with a segment error.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>253</span></u><span
|
||
lang=EN-US> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD>ͼ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>дʱ<EFBFBD><EFBFBD><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѵ<EFBFBD><EFBFBD>ڵ<EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD>棨дʱ<EFBFBD><EFBFBD><EFBFBD>ƣ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͨ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>渴<EFBFBD>Ƶ<EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>µ<EFBFBD>ַ<EFBFBD>ϲ<EFBFBD><EFBFBD>ҵݼ<EFBFBD>ԭҳ<EFBFBD><EFBFBD>Ĺ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵʵ<EFBFBD>ֵġ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> *</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>ռ䣬<EFBFBD><EFBFBD><EFBFBD>Ǿ<EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD>γ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span>ִ<EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>洦<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>洦<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>쳣<EFBFBD>жϴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><EFBFBD>õ<EFBFBD><span
|
||
lang=EN-US>C</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>page.s</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>б<EFBFBD><EFBFBD><EFBFBD><EFBFBD>á<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>error_code
|
||
</span><EFBFBD><EFBFBD> <span lang=EN-US>address </span><EFBFBD>ǽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>дд<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><span lang=EN-US> CPU</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>쳣<EFBFBD><EFBFBD><EFBFBD>Զ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɵġ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // error_code</span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͣ<EFBFBD><EFBFBD>μ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>¿<EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD>ġ<EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>쳣<EFBFBD><EFBFBD>һ<EFBFBD>ڣ<EFBFBD><span
|
||
lang=EN-US>address</span><EFBFBD>Dz<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>쳣<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ʱ<EFBFBD>踴<EFBFBD><EFBFBD>ҳ<EFBFBD>棨дʱ<EFBFBD><EFBFBD><EFBFBD>ƣ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>254</span></u><span
|
||
lang=EN-US> void <u><span style='color:blue'>do_wp_page</span></u>(unsigned
|
||
long error_code,unsigned long address)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>255</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><span lang=EN-US>CPU</span><EFBFBD><EFBFBD><EFBFBD>ƼĴ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>CR2</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>쳣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD><EFBFBD>ʲô<EFBFBD><EFBFBD>Χ<EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>address</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>С<EFBFBD><EFBFBD><span lang=EN-US>
|
||
TASK_SIZE</span><EFBFBD><EFBFBD><span lang=EN-US>0x4000000</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>64MB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD>쳣ҳ<EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں˻<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD><EFBFBD>Χ<EFBFBD>ڣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD>ں˷<EFBFBD>Χ<EFBFBD>ڴ汻д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US> (address<73>C</span><EFBFBD><EFBFBD>ǰ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>̴<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>ַ<span
|
||
lang=EN-US>)</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̵ij<EFBFBD><EFBFBD>ȣ<EFBFBD><span lang=EN-US>64MB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<span lang=EN-US>address</span><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>쳣<EFBFBD>Ľ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD>ռ䷶Χ<EFBFBD>ڣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>256</span></u><span
|
||
lang=EN-US> if (address < <u><span
|
||
style='color:blue'>TASK_SIZE</span></u>)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>257</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>printk</span></u>(<i>"\n\rBAD! KERNEL MEMORY
|
||
WP-ERR!\n\r"</i>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>258</span></u><span
|
||
lang=EN-US> if (address - <u><span
|
||
style='color:blue'>current</span></u>->start_code > <u><span
|
||
style='color:blue'>TASK_SIZE</span></u>) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>259</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>printk</span></u>(<i>"Bad things happen: page
|
||
error in do_wp_page\n\r"</i>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>260</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>do_exit</span></u>(<u><span style='color:blue'>SIGSEGV</span></u>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>261</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>262</span></u><span
|
||
lang=EN-US> #if 0</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>263</span></u><span
|
||
lang=EN-US> <b><i>/* we cannot do this yet: the estdio library writes to code
|
||
space */</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>264</span></u><span
|
||
lang=EN-US> <b><i>/* stupid, stupid. I really want the libc.a from GNU */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /* </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>estdio</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD>ִ<EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> /* </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̫<EFBFBD><EFBFBD><EFBFBD>ˡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>GNU</span><EFBFBD>õ<EFBFBD><span lang=EN-US>libc.a</span><EFBFBD>⡣<span lang=EN-US>*/</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַλ<EFBFBD>ڽ<EFBFBD><EFBFBD>̵Ĵ<EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִֹ<EFBFBD>г<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD><EFBFBD><EFBFBD>ġ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>265</span></u><span
|
||
lang=EN-US> if (<u><span
|
||
style='color:blue'>CODE_SPACE</span></u>(address))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>266</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>do_exit</span></u>(<u><span style='color:blue'>SIGSEGV</span></u>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>267</span></u><span
|
||
lang=EN-US> #endif</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>溯<EFBFBD><EFBFBD><span
|
||
lang=EN-US>un_wp_page()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD>ҳ<EFBFBD>汣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҪΪ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ò<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<span lang=EN-US>address</span>ָ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>е<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>룬<EFBFBD><EFBFBD><EFBFBD><EFBFBD>㷽<EFBFBD><EFBFBD><EFBFBD>ǣ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>
|
||
((address>>10) & 0xffc)</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>е<EFBFBD>ƫ<EFBFBD>Ƶ<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD>ṹ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>(address>>12) </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ÿ<EFBFBD><EFBFBD>ռ<span lang=EN-US>4</span><EFBFBD><EFBFBD><EFBFBD>ֽڣ<EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // 4</span><EFBFBD><EFBFBD><span lang=EN-US>(address>>12)<<2
|
||
= (address>>10)&0xffc </span><EFBFBD>Ϳɵõ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڱ<EFBFBD><EFBFBD>е<EFBFBD>ƫ<EFBFBD>Ƶ<EFBFBD>ַ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>&0xffc</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD>ַ<EFBFBD><EFBFBD>Χ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ڡ<EFBFBD>
|
||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊֻ<EFBFBD>ƶ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>10</span>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>2</span>λ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>12 </span>λ<EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>2</span>λ<EFBFBD><EFBFBD>ҲӦ<EFBFBD><EFBFBD><EFBFBD>ε<EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD><D6B7>ҳ<EFBFBD><D2B3><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><D2B3><EFBFBD><EFBFBD>ƫ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>Ƶ<EFBFBD>ֱַ<EFBFBD><EFBFBD>һЩ<EFBFBD>ı<EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>(((address>>12) & 0x3ff)<<2 )</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>
|
||
(0xfffff000 & *((address>>20) &0xffc))</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ĵ<EFBFBD>ֵַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // ((address>>20)
|
||
&0xffc)</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD>е<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>е<EFBFBD>ƫ<EFBFBD><EFBFBD>λ<EFBFBD>á<EFBFBD><EFBFBD><EFBFBD>Ϊ</p>
|
||
|
||
<p class=a><span lang=EN-US> // address>>22 </span><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ÿ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>4</span><EFBFBD><EFBFBD><EFBFBD>ֽڣ<EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>4</span><EFBFBD><EFBFBD> <span lang=EN-US>(address>>22)<<2
|
||
</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // = (address>>20) </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>е<EFBFBD>ƫ<EFBFBD>Ƶ<EFBFBD>ַ<EFBFBD><EFBFBD>
|
||
<span lang=EN-US>&0xffc</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>2</span>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊֻ<EFBFBD>ƶ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>20</span>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>2</span>λ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݣ<EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ε<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // *((address>>20)
|
||
&0xffc) </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡָ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD>Ӧҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // 0xffffff000</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ε<EFBFBD>ҳĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD>һЩ<EFBFBD><EFBFBD>־λ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>12</span>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD>۱<EFBFBD>ʾΪ</p>
|
||
|
||
<p class=a><span lang=EN-US> // (0xffffff000 &
|
||
*((unsigned long *) (((address>>22) & 0x3ff)<<2)))</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD> <20>ɢ<EFBFBD><C9A2><EFBFBD>ҳ<EFBFBD><D2B3><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><D2B3><EFBFBD><EFBFBD>ƫ<EFBFBD>Ƶ<EFBFBD>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD>Ŀ¼<C4BF><C2BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD>Ӧҳ<D3A6><D2B3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>õ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>루<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Թ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>и<EFBFBD><EFBFBD>ơ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>268</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>un_wp_page</span></u>((unsigned long *)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>269</span></u><span
|
||
lang=EN-US>
|
||
(((address>>10) & 0xffc) + (0xfffff000 &</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>270</span></u><span
|
||
lang=EN-US>
|
||
*((unsigned long *) ((address>>20) &0xffc)))));</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>271</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>272</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>273</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span>дҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>֤<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ҳ<EFBFBD>治<EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>档<EFBFBD><EFBFBD><span
|
||
lang=EN-US>fork.c</span><EFBFBD>е<EFBFBD><span lang=EN-US>34</span><EFBFBD>б<EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>֤ͨ<EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>verify_area()</span><EFBFBD><EFBFBD><EFBFBD>á<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>address</span><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>4G</span><EFBFBD>ռ<EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>274</span></u><span
|
||
lang=EN-US> void <u><span style='color:blue'>write_verify</span></u>(unsigned
|
||
long address)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>275</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>276</span></u><span
|
||
lang=EN-US> unsigned long page;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>277</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>ҳĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>еĴ<EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>P</span><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD>ڣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<span
|
||
lang=EN-US>P=1?</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڣ<EFBFBD><span lang=EN-US>P=0</span><EFBFBD><EFBFBD><EFBFBD>ء<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڵ<EFBFBD>ҳ<EFBFBD><EFBFBD>û</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>й<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>дʱ<EFBFBD><EFBFBD><EFBFBD>ƿ<EFBFBD><EFBFBD>ԣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Դ˲<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڵ<EFBFBD>ҳ<EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>ϵͳ<EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD>Ϊȱҳ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȥִ<EFBFBD><EFBFBD><span lang=EN-US>do_no_page()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ط<EFBFBD>ʹ<EFBFBD><EFBFBD>
|
||
<span lang=EN-US>put_page()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>档</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ų<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>е<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƫ<EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD>ö<EFBFBD>Ӧ<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD>ҳ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>롣<EFBFBD>ڸñ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>а<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ÿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>档</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>278</span></u><span
|
||
lang=EN-US> if (!( (page =
|
||
*((unsigned long *) ((address>>20) & 0xffc)) )&1))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>279</span></u><span
|
||
lang=EN-US>
|
||
return;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>280</span></u><span
|
||
lang=EN-US> page &=
|
||
0xfffff000;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>281</span></u><span
|
||
lang=EN-US> page +=
|
||
((address>>10) & 0xffc);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD><EFBFBD>жϸ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD>λ<span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD><span lang=EN-US>R/W</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<span lang=EN-US>0</span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>P</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>־<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>治<EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><span lang=EN-US>R/W=0</span><EFBFBD><EFBFBD><EFBFBD>Ҵ<EFBFBD><EFBFBD>ڣ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD>ִ<EFBFBD>й<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>дʱ<EFBFBD><EFBFBD><EFBFBD>ƣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʲôҲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>282</span></u><span
|
||
lang=EN-US> if ((3 &
|
||
*(unsigned long *) page) == 1) <b><i>/* non-writeable, present */</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>283</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>un_wp_page</span></u>((unsigned long *) page);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>284</span></u><span
|
||
lang=EN-US> return;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>285</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>286</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span>ȡ<EFBFBD><EFBFBD>һҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD>ӳ<EFBFBD>䵽ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // get_free_page()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ档<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǻ<EFBFBD>ȡ<EFBFBD><EFBFBD>һҳ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD>棬<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>put_page()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ӳ<EFBFBD>䵽ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>address</span><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>287</span></u><span
|
||
lang=EN-US> void <u><span style='color:blue'>get_empty_page</span></u>(unsigned
|
||
long address)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>288</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>289</span></u><span
|
||
lang=EN-US> unsigned long tmp;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>290</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>棬<EFBFBD><EFBFBD><EFBFBD>߲<EFBFBD><EFBFBD>ܽ<EFBFBD><EFBFBD><EFBFBD>ȡҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD>ڴ治<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // 292</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӣ<EFBFBD><EFBFBD>ע<EFBFBD>͵ĺ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǣ<EFBFBD><span
|
||
lang=EN-US>free_page()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>IJ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>tmp</span><EFBFBD><EFBFBD><span lang=EN-US>0</span>Ҳû<EFBFBD>й<EFBFBD>ϵ<EFBFBD><EFBFBD><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ء<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>291</span></u><span
|
||
lang=EN-US> if (!(tmp=<u><span
|
||
style='color:blue'>get_free_page</span></u>()) || !<u><span style='color:blue'>put_page</span></u>(tmp,address))
|
||
{</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>292</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>free_page</span></u>(tmp);
|
||
<b><i>/* 0 is ok - ignored */</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>293</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>oom</span></u>();</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>294</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>295</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>296</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>297</span></u><span
|
||
lang=EN-US> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>298</span></u><span
|
||
lang=EN-US> <b><i> * try_to_share() checks the page at address
|
||
"address" in the task "p",</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>299</span></u><span
|
||
lang=EN-US> <b><i> * to see if it exists, and if it is clean. If so, share
|
||
it with the current</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>300</span></u><span
|
||
lang=EN-US> <b><i> * task.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>301</span></u><span
|
||
lang=EN-US> <b><i> *</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>302</span></u><span
|
||
lang=EN-US> <b><i> * NOTE! This assumes we have checked that p != current,
|
||
and that they</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>303</span></u><span
|
||
lang=EN-US> <b><i> * share the same executable or library.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>304</span></u><span
|
||
lang=EN-US> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * try_to_share()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>"p"</span><EFBFBD>м<EFBFBD><EFBFBD>λ<EFBFBD>ڵ<EFBFBD>ַ<span lang=EN-US>"address"</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>棬<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD>ڣ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD>Ƿ<EFBFBD>ɾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǹɾ<EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>뵱ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> *</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span>ע<EFBFBD>⣡<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѽٶ<EFBFBD><span
|
||
lang=EN-US>p !=</span><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǹ<EFBFBD><EFBFBD><EFBFBD>ͬһ<EFBFBD><EFBFBD>ִ<EFBFBD>г<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD><EFBFBD><EFBFBD>ԶԵ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>й<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>p</span><EFBFBD><EFBFBD>ͬһִ<EFBFBD>д<EFBFBD><EFBFBD>룬Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>p</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>fork</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>̣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǵĴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>δ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݶ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD>ݶ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҲӦһ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <span lang=EN-US>address
|
||
</span><EFBFBD>ǽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǵ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <span lang=EN-US>p </span><EFBFBD><EFBFBD><EFBFBD>̹<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>p</span><EFBFBD>ǽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>Ľ<EFBFBD><EFBFBD>̡<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>p</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>address</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD>û<EFBFBD>б<EFBFBD><EFBFBD>Ĺ<EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>p</span><EFBFBD><EFBFBD><EFBFBD>̹<EFBFBD><EFBFBD><EFBFBD>֮<EFBFBD><EFBFBD>ͬʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD>ָ֤<EFBFBD><EFBFBD><EFBFBD>ĵ<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>棬<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD><span
|
||
lang=EN-US>1 - </span>ҳ<EFBFBD>湲<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>0 - </span>ʧ<EFBFBD>ܡ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>305</span></u><span
|
||
lang=EN-US> static int <u><span style='color:blue'>try_to_share</span></u>(unsigned
|
||
long address, struct <u><span style='color:blue'>task_struct</span></u> * p)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>306</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>307</span></u><span
|
||
lang=EN-US> unsigned long from;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>308</span></u><span
|
||
lang=EN-US> unsigned long to;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>309</span></u><span
|
||
lang=EN-US> unsigned long
|
||
from_page;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>310</span></u><span
|
||
lang=EN-US> unsigned long
|
||
to_page;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>311</span></u><span
|
||
lang=EN-US> unsigned long
|
||
phys_addr;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>312</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ȷֱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>p</span><EFBFBD>к͵<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span lang=EN-US>address</span><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>ҳĿ¼<EFBFBD>Ϊ<EFBFBD>˼<EFBFBD><EFBFBD>㷽<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span
|
||
lang=EN-US>address</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>'</span><EFBFBD><EFBFBD><span lang=EN-US>'</span>ҳĿ¼<EFBFBD><EFBFBD>ţ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Խ<EFBFBD><EFBFBD>̿ռ䣨<span
|
||
lang=EN-US>0 - 64MB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ŀ¼<EFBFBD><EFBFBD>š<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>'</span><EFBFBD><EFBFBD><span lang=EN-US>'</span>ҳĿ¼<EFBFBD><EFBFBD>ż<EFBFBD><EFBFBD>Ͻ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>p </span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>CPU 4G</span><EFBFBD><EFBFBD><EFBFBD>Կռ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>ҳĿ¼<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>p</span><EFBFBD>е<EFBFBD>ַ
|
||
<span lang=EN-US>address </span><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><span lang=EN-US>4G </span><EFBFBD><EFBFBD><EFBFBD>Կռ<EFBFBD><EFBFBD>е<EFBFBD>ʵ<EFBFBD><EFBFBD>ҳĿ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>from_page</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>'</span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>'</span>ҳĿ¼<EFBFBD><EFBFBD>ż<EFBFBD><EFBFBD>ϵ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>CPU 4G </span><EFBFBD><EFBFBD><EFBFBD>Կռ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>ҳĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD>ַ<span
|
||
lang=EN-US>address</span><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>4G</span><EFBFBD><EFBFBD><EFBFBD>Կռ<EFBFBD><EFBFBD>е<EFBFBD>ʵ<EFBFBD><EFBFBD>ҳĿ¼<EFBFBD><EFBFBD><span lang=EN-US>to_page</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>313</span></u><span
|
||
lang=EN-US> from_page = to_page
|
||
= ((address>>20) & 0xffc);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>314</span></u><span
|
||
lang=EN-US> from_page +=
|
||
((p->start_code>>20) & 0xffc); // p</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>315</span></u><span
|
||
lang=EN-US> to_page += ((<u><span
|
||
style='color:blue'>current</span></u>->start_code>>20) & 0xffc);
|
||
// </span><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ڵõ<EFBFBD><span lang=EN-US>p</span><EFBFBD><EFBFBD><EFBFBD>̺͵<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>address</span><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD>Խ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>p</span><EFBFBD>͵<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD>̽<EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȶ<EFBFBD><span lang=EN-US>p</span><EFBFBD><EFBFBD><EFBFBD>̵ı<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>в<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>p</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US> address</span><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>Ҹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҹɾ<EFBFBD><EFBFBD><EFBFBD>û<EFBFBD>б<EFBFBD><EFBFBD>Ĺ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ࣩ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD><span
|
||
lang=EN-US>P=0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾĿ¼<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD>Ķ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڣ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD>ء<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>Ӧҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span
|
||
lang=EN-US>from</span><EFBFBD><EFBFBD><EFBFBD>Ӷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span lang=EN-US>address</span><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ָ<EFBFBD>룬<EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>phys_addr</span><EFBFBD>С<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>316</span></u><span
|
||
lang=EN-US> <b><i>/* is there a page-directory at from? */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /* </span><EFBFBD><EFBFBD><span lang=EN-US>from</span><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳĿ¼<EFBFBD><span
|
||
lang=EN-US>*/</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>317</span></u><span
|
||
lang=EN-US> from = *(unsigned
|
||
long *) from_page;
|
||
// p</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݡ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>318</span></u><span
|
||
lang=EN-US> if (!(from &
|
||
1))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>319</span></u><span
|
||
lang=EN-US>
|
||
return 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>320</span></u><span
|
||
lang=EN-US> from &=
|
||
0xfffff000;
|
||
// </span>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>321</span></u><span
|
||
lang=EN-US> from_page = from +
|
||
((address>>10) & 0xffc); // </span>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>롣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>322</span></u><span
|
||
lang=EN-US> phys_addr =
|
||
*(unsigned long *) from_page; // </span>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ſ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD>Ҹɾ<EFBFBD><EFBFBD><EFBFBD>
|
||
<span lang=EN-US>0x41 </span><EFBFBD><EFBFBD>Ӧҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><span lang=EN-US>D</span><EFBFBD><EFBFBD><span lang=EN-US>Dirty</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // P</span><EFBFBD><EFBFBD><span lang=EN-US>Present</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>־<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>治<EFBFBD>ɾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD>ء<EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǴӸñ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ַ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ٱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>phys_addr</span><EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ټ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD>ԣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD>ó<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵַ<EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>С<EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>Ͷ<EFBFBD><span
|
||
lang=EN-US>(1MB)</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>323</span></u><span
|
||
lang=EN-US> <b><i>/* is the page clean and present? */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /* </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>*/</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>324</span></u><span
|
||
lang=EN-US> if ((phys_addr
|
||
& 0x41) != 0x01)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>325</span></u><span
|
||
lang=EN-US>
|
||
return 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>326</span></u><span
|
||
lang=EN-US> phys_addr &=
|
||
0xfffff000;
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>327</span></u><span
|
||
lang=EN-US> if (phys_addr >=
|
||
<u><span style='color:blue'>HIGH_MEMORY</span></u> || phys_addr < <u><span
|
||
style='color:blue'>LOW_MEM</span></u>)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>328</span></u><span
|
||
lang=EN-US>
|
||
return 0;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȶԵ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD>̵ı<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>в<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD>õ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>address</span><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>Ҹ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>棬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>P=0</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US style='font-family:Wingdings'><EFBFBD><EFBFBD></span><span lang=EN-US>to</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD><span
|
||
lang=EN-US>P=0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD>Ķ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>to_page</span><EFBFBD><EFBFBD><EFBFBD>ݣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD>档</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>329</span></u><span
|
||
lang=EN-US> to = *(unsigned
|
||
long *) to_page;
|
||
// </span><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݡ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>330</span></u><span
|
||
lang=EN-US> if (!(to & 1))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>331</span></u><span
|
||
lang=EN-US>
|
||
if (to = <u><span style='color:blue'>get_free_page</span></u>())</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>332</span></u><span
|
||
lang=EN-US>
|
||
*(unsigned long *) to_page = to | 7;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>333</span></u><span
|
||
lang=EN-US>
|
||
else</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>334</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>oom</span></u>();</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡĿ¼<EFBFBD><EFBFBD><EFBFBD>е<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span
|
||
lang=EN-US style='font-family:Wingdings'><EFBFBD><EFBFBD></span><span lang=EN-US>to</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<span
|
||
lang=EN-US><<2</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڱ<EFBFBD><EFBFBD><EFBFBD>ƫ<EFBFBD>Ƶ<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span lang=EN-US
|
||
style='font-family:Wingdings'><EFBFBD><EFBFBD></span><span lang=EN-US>to_page</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ը<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD>Ǽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڣ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD>λ<span
|
||
lang=EN-US>P=1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD>ԭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>빲<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>p</span><EFBFBD>ж<EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>棬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Լ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>Ѿ<EFBFBD>ռ<EFBFBD><EFBFBD><EFBFBD>ˣ<EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>档<EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD>ں˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>335</span></u><span
|
||
lang=EN-US> to &=
|
||
0xfffff000;
|
||
// </span>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>336</span></u><span
|
||
lang=EN-US> to_page = to +
|
||
((address>>10) & 0xffc); //
|
||
</span>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>337</span></u><span
|
||
lang=EN-US> if (1 &
|
||
*(unsigned long *) to_page)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>338</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>panic</span></u>(<i>"try_to_share: to_page
|
||
already exists"</i>);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ҵ<EFBFBD><EFBFBD>˽<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>p</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span lang=EN-US>address</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD>ĸɾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҵ<EFBFBD><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>棬<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳȷ<EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD>ǰ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span
|
||
lang=EN-US> address </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD>Ķ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ֮<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڶ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǽ<EFBFBD><EFBFBD>й<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȶ<EFBFBD><span
|
||
lang=EN-US>p</span><EFBFBD><EFBFBD><EFBFBD>̵<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>R/W=0</span><EFBFBD><EFBFBD>ֻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>־<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD≯<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US> p</span><EFBFBD><EFBFBD><EFBFBD>̵<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span lang=EN-US> address </span><EFBFBD><EFBFBD>ҳ<EFBFBD>漴<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ӳ<EFBFBD>䵽<span lang=EN-US>p</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span
|
||
lang=EN-US>address</span><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ϡ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>339</span></u><span
|
||
lang=EN-US> <b><i>/* share them: write-protect */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /* </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǽ<EFBFBD><EFBFBD>й<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US> */</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>340</span></u><span
|
||
lang=EN-US> *(unsigned long *)
|
||
from_page &= ~2;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>341</span></u><span
|
||
lang=EN-US> *(unsigned long *)
|
||
to_page = *(unsigned long *) from_page;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ˢ<EFBFBD><EFBFBD>ҳ<EFBFBD>任<EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD>塣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ţ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧҳ<EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD>ֽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>342</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>invalidate</span></u>();</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>343</span></u><span
|
||
lang=EN-US> phys_addr -= <u><span
|
||
style='color:blue'>LOW_MEM</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>344</span></u><span
|
||
lang=EN-US> phys_addr >>=
|
||
12;
|
||
// </span><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>š<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>345</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>mem_map</span></u>[phys_addr]++;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>346</span></u><span
|
||
lang=EN-US> return 1;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>347</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>348</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>349</span></u><span
|
||
lang=EN-US> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>350</span></u><span
|
||
lang=EN-US> <b><i> * share_page() tries to find a process that could share
|
||
a page with</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>351</span></u><span
|
||
lang=EN-US> <b><i> * the current one. Address is the address of the wanted
|
||
page relative</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>352</span></u><span
|
||
lang=EN-US> <b><i> * to the current data space.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>353</span></u><span
|
||
lang=EN-US> <b><i> *</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>354</span></u><span
|
||
lang=EN-US> <b><i> * We first check if it is at all feasible by checking
|
||
executable->i_count.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>355</span></u><span
|
||
lang=EN-US> <b><i> * It should be >1 if there are other tasks sharing
|
||
this inode.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>356</span></u><span
|
||
lang=EN-US> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * share_page()</span><EFBFBD><EFBFBD>ͼ<EFBFBD>ҵ<EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>뵱ǰ<EFBFBD><EFBFBD><EFBFBD>̹<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>档<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>address</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿռ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ijҳ<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> *</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͨ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>executable->i_count</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֤<EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѹ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>inode</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>洦<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ڷ<EFBFBD><EFBFBD><EFBFBD>ȱҳ<EFBFBD>쳣ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬһ<EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̽<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>湲<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD>ϵͳ<EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ϵͳ<EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>乲<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ҳ<EFBFBD>档<EFBFBD><EFBFBD>ϵͳ<EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>뵱ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڣ<EFBFBD><EFBFBD><EFBFBD>˺<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD>ϵͳ<EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD>ͬһ<EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ļ<EFBFBD><EFBFBD>ķ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ý<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݽṹ<EFBFBD>е<EFBFBD> <span
|
||
lang=EN-US>executable </span><EFBFBD>ֶΣ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>library</span><EFBFBD>ֶΣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֶ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD>г<EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>õĿ<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>е<EFBFBD>
|
||
<span lang=EN-US>i</span><EFBFBD>ڵ㡣<EFBFBD><EFBFBD><EFBFBD>ݸ<EFBFBD> <span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // i_count </span><EFBFBD><EFBFBD><EFBFBD>ǿ<EFBFBD><EFBFBD>Խ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>жϡ<EFBFBD> <20><><EFBFBD>ڵ<EFBFBD><DAB5><span
|
||
lang=EN-US>i_count</span>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϵͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬһ<EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٶ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ṹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƚ<EFBFBD><EFBFBD>Ƿ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD> <span lang=EN-US>executable</span><EFBFBD>ֶΣ<EFBFBD><EFBFBD><EFBFBD>
|
||
<span lang=EN-US>library</span><EFBFBD>ֶΣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִͬ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>inode</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>й<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㡣<span lang=EN-US>address</span><EFBFBD>ǽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ǵ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>p</span><EFBFBD><EFBFBD><EFBFBD>̹<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>1 <20>C</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0 - </span>ʧ<EFBFBD>ܡ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>357</span></u><span
|
||
lang=EN-US> static int <u><span style='color:blue'>share_page</span></u>(struct
|
||
<u><span style='color:blue'>m_inode</span></u> * inode, unsigned long address)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>358</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>359</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>task_struct</span></u> ** p;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>360</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ȼ<EFBFBD><EFBFBD>һ<EFBFBD>²<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD> <span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ü<EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD> <span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ü<EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // 1</span><EFBFBD><EFBFBD><span lang=EN-US>executable->i_count
|
||
=1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ָ<EFBFBD><EFBFBD>գ<EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD>ǰϵͳ<EFBFBD><EFBFBD>ֻ<EFBFBD><EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ṩ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԣ<EFBFBD>ֱ<EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>361</span></u><span
|
||
lang=EN-US> if
|
||
(inode->i_count < 2 || !inode)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>362</span></u><span
|
||
lang=EN-US>
|
||
return 0;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѱ<EFBFBD><EFBFBD><EFBFBD>뵱ǰ<EFBFBD><EFBFBD><EFBFBD>̿ɹ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>Ľ<EFBFBD><EFBFBD>̣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִͬ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Զ<EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>й<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span
|
||
lang=EN-US>address</span>С<EFBFBD>ڽ<EFBFBD><EFBFBD>̿<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD>ռ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>ַ<span
|
||
lang=EN-US>LIBRARY_OFFSET</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ڽ<EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>Ӧ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD>ռ䷶Χ<EFBFBD>ڣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǽ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̵<EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣨<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>executable</span><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѱ<EFBFBD>ҡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span
|
||
lang=EN-US>address</span><EFBFBD><EFBFBD><EFBFBD>ڵ<EFBFBD><EFBFBD>ڽ<EFBFBD><EFBFBD>̿<EFBFBD><EFBFBD>ļ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD>ռ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>ַ<span
|
||
lang=EN-US>LIBRARY_OFFSET</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ڽ<EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>õĿ<EFBFBD><EFBFBD>ļ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǽ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>ڵ<EFBFBD><span
|
||
lang=EN-US> inode </span><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̵Ŀ<EFBFBD><EFBFBD>ļ<EFBFBD><span lang=EN-US> i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѱ<EFBFBD>ҡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҵ<EFBFBD>ij<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>p</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>executable</span><EFBFBD><EFBFBD><span lang=EN-US>library</span><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>Ľڵ<EFBFBD><span
|
||
lang=EN-US>inode</span><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>̽<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>try_to_share()
|
||
</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>湲<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʧ<EFBFBD>ܡ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>363</span></u><span
|
||
lang=EN-US> for (p = &<u><span
|
||
style='color:blue'>LAST_TASK</span></u> ; p > &<u><span
|
||
style='color:blue'>FIRST_TASK</span></u> ; --p) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>364</span></u><span
|
||
lang=EN-US>
|
||
if (!*p)
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѱ<EFBFBD>ҡ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>365</span></u><span
|
||
lang=EN-US>
|
||
continue;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>366</span></u><span
|
||
lang=EN-US>
|
||
if (<u><span style='color:blue'>current</span></u> == *p)
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǵ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѱ<EFBFBD>ҡ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>367</span></u><span
|
||
lang=EN-US>
|
||
continue;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>368</span></u><span
|
||
lang=EN-US>
|
||
if (address < <u><span style='color:blue'>LIBRARY_OFFSET</span></u>) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>369</span></u><span
|
||
lang=EN-US>
|
||
if (inode != (*p)->executable) // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㡣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>370</span></u><span
|
||
lang=EN-US>
|
||
continue;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>371</span></u><span
|
||
lang=EN-US>
|
||
} else {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>372</span></u><span
|
||
lang=EN-US>
|
||
if (inode != (*p)->library) // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>ÿ<EFBFBD><EFBFBD>ļ<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㡣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>373</span></u><span
|
||
lang=EN-US>
|
||
continue;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>374</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>375</span></u><span
|
||
lang=EN-US>
|
||
if (<u><span style='color:blue'>try_to_share</span></u>(address,*p))
|
||
// </span><EFBFBD><EFBFBD><EFBFBD>Թ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>档</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>376</span></u><span
|
||
lang=EN-US>
|
||
return 1;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>377</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>378</span></u><span
|
||
lang=EN-US> return 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>379</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>380</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span>ִ<EFBFBD><EFBFBD>ȱҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ʲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>쳣<EFBFBD>жϴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><EFBFBD>ô˺<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>page.s</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>б<EFBFBD><EFBFBD><EFBFBD><EFBFBD>á<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>error_code
|
||
</span><EFBFBD><EFBFBD> <span lang=EN-US>address </span><EFBFBD>ǽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڷ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><span lang=EN-US> CPU</span><EFBFBD><EFBFBD>ȱҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>쳣<EFBFBD><EFBFBD><EFBFBD>Զ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // error_code</span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͣ<EFBFBD><EFBFBD>μ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>¿<EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD>ġ<EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>쳣<EFBFBD><EFBFBD>һ<EFBFBD>ڣ<EFBFBD><span
|
||
lang=EN-US>address</span><EFBFBD>Dz<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>쳣<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȳ鿴<EFBFBD><EFBFBD>ȱҳ<EFBFBD>Ƿ<EFBFBD><EFBFBD>ڽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѽ<EFBFBD><EFBFBD>ص<EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD>ļ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>湲<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڽ<EFBFBD><EFBFBD>̶<EFBFBD>̬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD>һҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ɡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ôֻ<EFBFBD>ܴ<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD>ļ<EFBFBD><EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>浽ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>381</span></u><span
|
||
lang=EN-US> void <u><span style='color:blue'>do_no_page</span></u>(unsigned
|
||
long error_code,unsigned long address)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>382</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>383</span></u><span
|
||
lang=EN-US> int nr[4];</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>384</span></u><span
|
||
lang=EN-US> unsigned long tmp;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>385</span></u><span
|
||
lang=EN-US> unsigned long page;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>386</span></u><span
|
||
lang=EN-US> int block,i;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>387</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>m_inode</span></u> * inode;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>388</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><span lang=EN-US>CPU</span><EFBFBD><EFBFBD><EFBFBD>ƼĴ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>CR2</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>쳣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD><EFBFBD>ʲô<EFBFBD><EFBFBD>Χ<EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>address</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>С<EFBFBD><EFBFBD><span lang=EN-US>
|
||
TASK_SIZE</span><EFBFBD><EFBFBD><span lang=EN-US>0x4000000</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>64MB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD>쳣ҳ<EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں˻<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD><EFBFBD>Χ<EFBFBD>ڣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD>ں˷<EFBFBD>Χ<EFBFBD>ڴ汻д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US> (address<73>C</span><EFBFBD><EFBFBD>ǰ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>̴<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>ַ<span
|
||
lang=EN-US>)</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̵ij<EFBFBD><EFBFBD>ȣ<EFBFBD><span lang=EN-US>64MB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<span lang=EN-US>address</span><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>쳣<EFBFBD>Ľ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD>ռ䷶Χ<EFBFBD>ڣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>389</span></u><span
|
||
lang=EN-US> if (address < <u><span
|
||
style='color:blue'>TASK_SIZE</span></u>)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>390</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>printk</span></u>(<i>"\n\rBAD!! KERNEL PAGE
|
||
MISSING\n\r"</i>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>391</span></u><span
|
||
lang=EN-US> if (address - <u><span
|
||
style='color:blue'>current</span></u>->start_code > <u><span
|
||
style='color:blue'>TASK_SIZE</span></u>) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>392</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>printk</span></u>(<i>"Bad things happen:
|
||
nonexistent page error in do_no_page\n\r"</i>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>393</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>do_exit</span></u>(<u><span style='color:blue'>SIGSEGV</span></u>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>394</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<span
|
||
lang=EN-US>address</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD>Ķ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>룬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݸ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // address</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD>ڽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>沢<EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ</p>
|
||
|
||
<p class=a><span lang=EN-US> // address</span><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD>Ķ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڣ<EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ĵ<EFBFBD>ַ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƫ<EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<span
|
||
lang=EN-US>address</span><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>룬<EFBFBD>Ӷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ݡ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݲ<EFBFBD>Ϊ<span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<span lang=EN-US>P=0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD>ڽ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǵӽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>е<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>395</span></u><span
|
||
lang=EN-US> page = *(unsigned
|
||
long *) ((address >> 20) & 0xffc); // </span>ȡĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݡ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>396</span></u><span
|
||
lang=EN-US> if (page & 1) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>397</span></u><span
|
||
lang=EN-US>
|
||
page &= 0xfffff000;
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>398</span></u><span
|
||
lang=EN-US>
|
||
page += (address >> 10) & 0xffc;
|
||
// </span>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>롣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>399</span></u><span
|
||
lang=EN-US>
|
||
tmp = *(unsigned long *) page;
|
||
// </span>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݡ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>400</span></u><span
|
||
lang=EN-US>
|
||
if (tmp && !(1 & tmp)) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>401</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>swap_in</span></u>((unsigned long *) page);
|
||
// </span><EFBFBD>ӽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD>ҳ<EFBFBD>档</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>402</span></u><span
|
||
lang=EN-US>
|
||
return;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>403</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>404</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD>Կռ<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span
|
||
lang=EN-US>address</span><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<EFBFBD>ڽ<EFBFBD><EFBFBD>̿ռ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>̻<EFBFBD>ַ<EFBFBD><EFBFBD>ƫ<EFBFBD>Ƴ<EFBFBD><EFBFBD><EFBFBD>ֵ<span
|
||
lang=EN-US>tmp</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD>Ӷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȱҳҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ڿ<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>еľ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD>ݿ<EFBFBD>š<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>405</span></u><span
|
||
lang=EN-US> address &=
|
||
0xfffff000;
|
||
// address</span><EFBFBD><EFBFBD>ȱҳҳ<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>406</span></u><span
|
||
lang=EN-US> tmp = address - <u><span
|
||
style='color:blue'>current</span></u>->start_code;
|
||
// </span>ȱҳҳ<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ȱҳ<EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span
|
||
lang=EN-US>tmp</span><EFBFBD><EFBFBD><EFBFBD>ڿ<EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>ڽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD>ʼλ<EFBFBD>ã<EFBFBD>˵<EFBFBD><EFBFBD>ȱ<EFBFBD>ٵ<EFBFBD>ҳ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ڿ<EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǵӵ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݽṹ<EFBFBD>п<EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD>ÿ<EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><span lang=EN-US>library</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȱҳ<EFBFBD>ڿ<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD>ݿ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>block</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȱҳ<EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span lang=EN-US>tmp</span>С<EFBFBD>ڽ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD>ռ<EFBFBD><EFBFBD>ĩ<EFBFBD><EFBFBD>λ<EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD>ȱ<EFBFBD>ٵ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ڽ<EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ǿ<EFBFBD><EFBFBD>Դӵ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><span lang=EN-US>executable</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȱҳ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD>ݿ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>block</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span lang=EN-US>tmp</span><EFBFBD>Ȳ<EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>ӳ<EFBFBD><EFBFBD>ĵ<EFBFBD>ַ<EFBFBD><EFBFBD>Χ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ڣ<EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD>ڿ<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>ռ䷶Χ<EFBFBD>ڣ<EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD>ȱҳ<EFBFBD>ǽ<EFBFBD><EFBFBD>̷<EFBFBD><EFBFBD>ʶ<EFBFBD>̬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>£<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>û<EFBFBD>ж<EFBFBD>Ӧ<span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ<EFBFBD>ţ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ÿգ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>ϴ<EFBFBD>ŵ<EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>dz<EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD>ṹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڶ<EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>ʱ<EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD>ȼ<EFBFBD><EFBFBD><EFBFBD>ȱҳ<EFBFBD><EFBFBD><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ<EFBFBD>š<EFBFBD><EFBFBD><EFBFBD>Ϊÿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݳ<EFBFBD><EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>BLOCK_SIZE =</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // 1KB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һҳ<EFBFBD>ڴ<EFBFBD>ɴ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>4</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ顣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span lang=EN-US>tmp</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ<EFBFBD><EFBFBD>С<EFBFBD>ټ<EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD>ɵó<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ȱ<EFBFBD>ٵ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>block</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>407</span></u><span
|
||
lang=EN-US> if (tmp >= <u><span
|
||
style='color:blue'>LIBRARY_OFFSET</span></u> ) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>408</span></u><span
|
||
lang=EN-US>
|
||
inode = <u><span style='color:blue'>current</span></u>->library;
|
||
// </span><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>ȱҳ<EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>š<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>409</span></u><span
|
||
lang=EN-US>
|
||
block = 1 + (tmp-<u><span style='color:blue'>LIBRARY_OFFSET</span></u>) / <u><span
|
||
style='color:blue'>BLOCK_SIZE</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>410</span></u><span
|
||
lang=EN-US> } else if (tmp <
|
||
<u><span style='color:blue'>current</span></u>->end_data) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>411</span></u><span
|
||
lang=EN-US>
|
||
inode = <u><span style='color:blue'>current</span></u>->executable;
|
||
// </span>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>ȱҳ<EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>š<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>412</span></u><span
|
||
lang=EN-US>
|
||
block = 1 + tmp / <u><span style='color:blue'>BLOCK_SIZE</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>413</span></u><span
|
||
lang=EN-US> } else {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>414</span></u><span
|
||
lang=EN-US>
|
||
inode = <u><span style='color:blue'>NULL</span></u>;
|
||
// </span><EFBFBD>Ƕ<EFBFBD>̬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݻ<EFBFBD>ջ<EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD>档</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>415</span></u><span
|
||
lang=EN-US>
|
||
block = 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>416</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ǽ<EFBFBD><EFBFBD>̷<EFBFBD><EFBFBD><EFBFBD><EFBFBD>䶯̬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD>˴<EFBFBD><EFBFBD>ջ<EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȱҳ<EFBFBD>쳣<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һҳ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD>沢ӳ<EFBFBD>䵽<EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<span
|
||
lang=EN-US>address</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȱҳ<EFBFBD><EFBFBD><EFBFBD>ڽ<EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Χ<EFBFBD>ڣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǿͳ<EFBFBD><EFBFBD>Թ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ҳ<EFBFBD><EFBFBD><span lang=EN-US>page</span><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>϶<EFBFBD>ȡִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD>Ӧҳ<EFBFBD>沢<EFBFBD><EFBFBD><EFBFBD>ã<EFBFBD>ӳ<EFBFBD>䣩<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ</p>
|
||
|
||
<p class=a><span lang=EN-US> // tmp</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>417</span></u><span
|
||
lang=EN-US> if (!inode) {
|
||
// </span><EFBFBD>Ƕ<EFBFBD>̬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD>档</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>418</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>get_empty_page</span></u>(address);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>419</span></u><span
|
||
lang=EN-US>
|
||
return;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>420</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>421</span></u><span
|
||
lang=EN-US> if (<u><span
|
||
style='color:blue'>share_page</span></u>(inode,tmp))
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span lang=EN-US>tmp</span><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>Ĺ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>422</span></u><span
|
||
lang=EN-US>
|
||
return;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>423</span></u><span
|
||
lang=EN-US> if (!(page = <u><span
|
||
style='color:blue'>get_free_page</span></u>()))
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ档</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>424</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>oom</span></u>();</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>425</span></u><span
|
||
lang=EN-US> <b><i>/* remember that 1 block is used for header */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /* </span><EFBFBD><EFBFBD>ס<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷҪʹ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ<EFBFBD><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ź<EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD>ǾͿ<EFBFBD><EFBFBD>Դ<EFBFBD>ӳ<EFBFBD><EFBFBD>λͼ<EFBFBD><EFBFBD><EFBFBD>ҵ<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>ж<EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD>豸</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ţ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>nr[]</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>bread_page()</span><EFBFBD><EFBFBD><EFBFBD>ɰ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>4</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>뵽<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // page</span><EFBFBD>С<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>426</span></u><span
|
||
lang=EN-US> for (i=0 ; i<4 ;
|
||
block++,i++)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>427</span></u><span
|
||
lang=EN-US>
|
||
nr[i] = <u><span style='color:blue'>bmap</span></u>(inode,block);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>428</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>bread_page</span></u>(page,inode->i_dev,nr);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ڶ<EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>еĶ<EFBFBD>ȡҳ<EFBFBD><EFBFBD>λ<EFBFBD>ÿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ļ<EFBFBD>β<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ij<EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD>˾Ϳ<EFBFBD><EFBFBD>ܶ<EFBFBD><EFBFBD><EFBFBD>һЩ<EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>IJ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD>ⲿ<EFBFBD>ֳ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><span lang=EN-US>end_data</span><EFBFBD>Ժ<EFBFBD>IJ<EFBFBD><EFBFBD>ֽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>㴦<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĩ<EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1</span>ҳ<EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>Ǵ<EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD>ȡ<EFBFBD><EFBFBD>ҳ<EFBFBD>棬<EFBFBD><EFBFBD><EFBFBD>Ǵӿ<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>ж<EFBFBD>ȡ<EFBFBD>ģ<EFBFBD><EFBFBD><EFBFBD>˲<EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>429</span></u><span
|
||
lang=EN-US> i = tmp + 4096 - <u><span
|
||
style='color:blue'>current</span></u>->end_data;
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֽڳ<EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>430</span></u><span
|
||
lang=EN-US> if (i>4095)
|
||
// </span><EFBFBD><EFBFBD>ĩ<EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>1</span>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>㡣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>431</span></u><span
|
||
lang=EN-US>
|
||
i = 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>432</span></u><span
|
||
lang=EN-US> tmp = page + 4096;
|
||
//
|
||
tmp</span>ָ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ĩ<EFBFBD>ˡ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>433</span></u><span
|
||
lang=EN-US> while (i-- > 0)
|
||
{
|
||
// </span>ҳ<EFBFBD><EFBFBD>ĩ<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ֽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>㡣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>434</span></u><span
|
||
lang=EN-US>
|
||
tmp--;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>435</span></u><span
|
||
lang=EN-US>
|
||
*(char *)tmp = 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>436</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȱҳ<EFBFBD>쳣<EFBFBD><EFBFBD>һҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ӳ<EFBFBD>䵽ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>ַ<span
|
||
lang=EN-US>address</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD>ء<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD>ڴ治<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>437</span></u><span
|
||
lang=EN-US> if (<u><span
|
||
style='color:blue'>put_page</span></u>(page,address))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>438</span></u><span
|
||
lang=EN-US>
|
||
return;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>439</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>free_page</span></u>(page);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>440</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>oom</span></u>();</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>441</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>442</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>1MB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD>й<EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD>ij<EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ù<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>ҳ<EFBFBD>泤<EFBFBD><EFBFBD>Ϊ</p>
|
||
|
||
<p class=a><span lang=EN-US> // 4KB</span><EFBFBD>ֽڡ<EFBFBD><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US> 1MB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ滮<EFBFBD>ֳ<EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>棬<EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD>ֽ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>mem_map[]
|
||
</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Щҳ<EFBFBD>档<EFBFBD><EFBFBD><EFBFBD>ھ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>16MB</span><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>鹲<EFBFBD><EFBFBD><span lang=EN-US>3840</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>
|
||
((16MB - 1MB)/4KB)</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>3840</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>档ÿ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD>汻ռ<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>
|
||
mem_map[]</span><EFBFBD>ж<EFBFBD>Ӧ<EFBFBD>ĵ<EFBFBD><EFBFBD>ֽ<EFBFBD>ֵ<EFBFBD><EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>棬<EFBFBD>ͰѶ<EFBFBD>Ӧ<EFBFBD>ֽ<EFBFBD>ֵ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ֵΪ<span lang=EN-US> 0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD>Ӧҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD>
|
||
<EFBFBD><EFBFBD><EFBFBD>ֽ<EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD>ڻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD>Ӧҳ<EFBFBD>汻ռ<EFBFBD>û<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD>á<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ڸð汾<EFBFBD><EFBFBD> <span
|
||
lang=EN-US>Linux</span><EFBFBD>ں<EFBFBD><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܹ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US> 16MB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ棬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>16MB</span><EFBFBD><EFBFBD><EFBFBD>ڴ潫<EFBFBD><EFBFBD><EFBFBD>ò<EFBFBD><EFBFBD>á<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ھ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>16MB</span><EFBFBD>ڴ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>PC</span><EFBFBD><EFBFBD>ϵͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <span lang=EN-US>RAMDISK</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <span
|
||
lang=EN-US>start_mem</span>ͨ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>4MB</span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>end_mem</span><EFBFBD><EFBFBD><span lang=EN-US>16MB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˴<EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Χ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>4MB<EFBFBD><EFBFBD>16MB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>3072</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>䡣<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Χ<span
|
||
lang=EN-US>0 - 1MB</span><EFBFBD>ڴ<EFBFBD>ռ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں<EFBFBD>ϵͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD>ں<EFBFBD>ֻʹ<EFBFBD><EFBFBD><span lang=EN-US>0 <20><>640Kb</span><EFBFBD><EFBFBD>ʣ<EFBFBD>µIJ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ֱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>ڴ<EFBFBD>ռ<EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>start_mem</span><EFBFBD>ǿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȥ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>RAMDISK</span><EFBFBD><EFBFBD>ռ<EFBFBD>ڴ<EFBFBD>ռ䣩<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // end_mem</span><EFBFBD><EFBFBD>ʵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD>Χ<span
|
||
lang=EN-US>start_mem</span><EFBFBD><EFBFBD><span lang=EN-US>end_mem</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>443</span></u><span
|
||
lang=EN-US> void <u><span style='color:blue'>mem_init</span></u>(long
|
||
start_mem, long end_mem)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>444</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>445</span></u><span
|
||
lang=EN-US> int i;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>446</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>Ƚ<EFBFBD><span lang=EN-US>1MB</span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>16MB</span><EFBFBD><EFBFBD>Χ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD>ֽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>ռ<EFBFBD><EFBFBD>״̬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ֽ<EFBFBD>ֵȫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ó<EFBFBD><span
|
||
lang=EN-US>USED</span><EFBFBD><EFBFBD><span lang=EN-US>100</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>PAGING_PAGES</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>(PAGING_MEMORY>>12)</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>1MB</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>(15MB/4KB = 3840)</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>447</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>HIGH_MEMORY</span></u> = end_mem;
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>߶ˣ<EFBFBD><span lang=EN-US>16MB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>448</span></u><span
|
||
lang=EN-US> for (i=0 ; i<<u><span
|
||
style='color:blue'>PAGING_PAGES</span></u> ; i++)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>449</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>mem_map</span></u>[i] = <u><span style='color:blue'>USED</span></u>;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD>ڴ<EFBFBD><span
|
||
lang=EN-US> start_mem </span><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD>ڴ<EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD>ֽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ <span
|
||
lang=EN-US>mem_map[] </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĵ<EFBFBD><span lang=EN-US>i</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD>ҳ<EFBFBD>档<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ҳ<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>㣨<EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ھ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>16MB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>ϵͳ<EFBFBD><EFBFBD><span lang=EN-US>mem_map[] </span><EFBFBD>ж<EFBFBD>Ӧ</p>
|
||
|
||
<p class=a><span lang=EN-US> // 4Mb--16Mb</span><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>㡣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>450</span></u><span
|
||
lang=EN-US> i = <u><span
|
||
style='color:blue'>MAP_NR</span></u>(start_mem);
|
||
// </span><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼλ<EFBFBD>ô<EFBFBD>ҳ<EFBFBD><EFBFBD>š<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>451</span></u><span
|
||
lang=EN-US> end_mem -=
|
||
start_mem;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>452</span></u><span
|
||
lang=EN-US> end_mem >>=
|
||
12;
|
||
// </span><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>453</span></u><span
|
||
lang=EN-US> while
|
||
(end_mem-->0)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>454</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>mem_map</span></u>[i++]=0;
|
||
// </span><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD>ֽ<EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD>㡣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>455</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>456</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ʾϵͳ<EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD>ֽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US> mem_map[] </span><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD>Լ<EFBFBD>ҳĿ¼<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD>ϵͳ<EFBFBD><EFBFBD>ʹ<EFBFBD>õ<EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US> chr_drv/keyboard.S</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>186</span><EFBFBD>б<EFBFBD><EFBFBD><EFBFBD><EFBFBD>á<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>¡<EFBFBD><span lang=EN-US>Shift
|
||
+ Scroll Lock</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϼ<EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾϵͳ<EFBFBD>ڴ<EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>457</span></u><span
|
||
lang=EN-US> void <u><span style='color:blue'>show_mem</span></u>(void)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>458</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>459</span></u><span
|
||
lang=EN-US> int i,j,k,<u><span
|
||
style='color:blue'>free</span></u>=0,total=0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>460</span></u><span
|
||
lang=EN-US> int shared=0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>461</span></u><span
|
||
lang=EN-US> unsigned long *
|
||
pg_tbl;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>462</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD>ֽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>mem_map[]</span><EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD>ϵͳ<EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>total</span><EFBFBD><EFBFBD><EFBFBD>Լ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>п<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>free</span><EFBFBD>ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>shared</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Щ<EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>463</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>printk</span></u>(<i>"Mem-info:\n\r"</i>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>464</span></u><span
|
||
lang=EN-US> for(i=0 ; i<<u><span
|
||
style='color:blue'>PAGING_PAGES</span></u> ; i++) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>465</span></u><span
|
||
lang=EN-US>
|
||
if (<u><span style='color:blue'>mem_map</span></u>[i] == <u><span
|
||
style='color:blue'>USED</span></u>)
|
||
// 1MB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ϵͳռ<EFBFBD>õ<EFBFBD>ҳ<EFBFBD>档</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>466</span></u><span
|
||
lang=EN-US>
|
||
continue;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>467</span></u><span
|
||
lang=EN-US>
|
||
total++;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>468</span></u><span
|
||
lang=EN-US>
|
||
if (!<u><span style='color:blue'>mem_map</span></u>[i])</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>469</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>free</span></u>++;
|
||
// </span><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ͳ<EFBFBD>ơ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>470</span></u><span
|
||
lang=EN-US>
|
||
else</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>471</span></u><span
|
||
lang=EN-US>
|
||
shared += <u><span style='color:blue'>mem_map</span></u>[i]-1;
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֽ<EFBFBD>ֵ<span lang=EN-US>>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>472</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>473</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>printk</span></u>(<i>"%d free pages of %d\n\r"</i>,<u><span
|
||
style='color:blue'>free</span></u>,total);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>474</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>printk</span></u>(<i>"%d pages shared\n\r"</i>,shared);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ͳ<EFBFBD>ƴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳĿ¼<EFBFBD><EFBFBD>ǰ<span
|
||
lang=EN-US>4</span><EFBFBD><EFBFBD>ں˴<EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊͳ<EFBFBD>Ʒ<EFBFBD>Χ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ɨ<EFBFBD>账<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳĿ¼<EFBFBD><EFBFBD>ӵ<EFBFBD><span
|
||
lang=EN-US>5</span><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳĿ¼<EFBFBD><EFBFBD><EFBFBD>ǰ<span lang=EN-US>4</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>Ķ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڣ<EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD>ͳ<EFBFBD>ƶ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD>õ<EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD>棨<span
|
||
lang=EN-US>484</span><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD>Ը<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͳ<EFBFBD>ơ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>475</span></u><span
|
||
lang=EN-US> k = 0;
|
||
// </span>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>476</span></u><span
|
||
lang=EN-US> for(i=4 ; i<1024
|
||
;) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>477</span></u><span
|
||
lang=EN-US>
|
||
if (1&<u><span style='color:blue'>pg_dir</span></u>[i]) {</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳĿ¼<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD>ڻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>ַ<span
|
||
lang=EN-US>HIGH_MEMORY</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>⡣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>478</span></u><span
|
||
lang=EN-US>
|
||
if (<u><span style='color:blue'>pg_dir</span></u>[i]><u><span
|
||
style='color:blue'>HIGH_MEMORY</span></u>) {
|
||
// </span>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>479</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>printk</span></u>(<i>"page directory[%d]:
|
||
%08X\n\r"</i>,</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>480</span></u><span
|
||
lang=EN-US> i,<u><span
|
||
style='color:blue'>pg_dir</span></u>[i]);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>481</span></u><span
|
||
lang=EN-US>
|
||
continue;
|
||
// continue</span>֮ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i++</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>482</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ҳĿ¼<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ġ<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>LOW_MEM</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>1MB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ڴ<EFBFBD>ҳͳ<EFBFBD><EFBFBD>ֵ<span
|
||
lang=EN-US>k</span><EFBFBD><EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϵͳռ<EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳͳ<EFBFBD><EFBFBD>ֵ<span lang=EN-US>free</span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD>Ӧҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ</p>
|
||
|
||
<p class=a><span lang=EN-US> // pg_tbl</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ը<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͳ<EFBFBD>ơ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD>Ҹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ҳ<EFBFBD>桰<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>LOW_MEM</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD>ͽ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>483</span></u><span
|
||
lang=EN-US>
|
||
if (<u><span style='color:blue'>pg_dir</span></u>[i]><u><span
|
||
style='color:blue'>LOW_MEM</span></u>)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>484</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>free</span></u>++,k++;
|
||
// </span>ͳ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ռ<EFBFBD><EFBFBD>ҳ<EFBFBD>档</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>485</span></u><span
|
||
lang=EN-US>
|
||
pg_tbl=(unsigned long *) (0xfffff000 & <u><span style='color:blue'>pg_dir</span></u>[i]);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>486</span></u><span
|
||
lang=EN-US>
|
||
for(j=0 ; j<1024 ; j++)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>487</span></u><span
|
||
lang=EN-US>
|
||
if ((pg_tbl[j]&1) && pg_tbl[j]><u><span style='color:blue'>LOW_MEM</span></u>)</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD>ڻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>ַ<span
|
||
lang=EN-US>HIGH_MEMORY</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>⣬</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>488</span></u><span
|
||
lang=EN-US>
|
||
if (pg_tbl[j]><u><span style='color:blue'>HIGH_MEMORY</span></u>)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>489</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>printk</span></u>(<i>"page_dir[%d][%d]:
|
||
%08X\n\r"</i>,</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>490</span></u><span
|
||
lang=EN-US>
|
||
i,j, pg_tbl[j]);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>491</span></u><span
|
||
lang=EN-US> else</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>492</span></u><span
|
||
lang=EN-US>
|
||
k++,<u><span style='color:blue'>free</span></u>++; // </span>ͳ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧҳ<EFBFBD>档</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>493</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ÿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Կռ䳤<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>64MB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD><EFBFBD><span lang=EN-US>16</span><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ÿͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>16</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ŀ¼<EFBFBD><EFBFBD>Ͱѽ<EFBFBD><EFBFBD>̵<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ṹռ<EFBFBD>õ<EFBFBD>ҳ<EFBFBD><EFBFBD>ͳ<EFBFBD>ƽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<span
|
||
lang=EN-US>k=0</span><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><span lang=EN-US>16</span><EFBFBD><EFBFBD>ҳĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ӧ<EFBFBD>Ľ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϵͳ<EFBFBD>в<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڣ<EFBFBD>û<EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD>ֹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD>˶<EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD>̺ź<EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ڴ<EFBFBD>ҳͳ<EFBFBD><EFBFBD>ֵ<span
|
||
lang=EN-US>k</span><EFBFBD><EFBFBD><span lang=EN-US>k</span><EFBFBD><EFBFBD><EFBFBD>㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD>õ<EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>494</span></u><span
|
||
lang=EN-US>
|
||
i++;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>495</span></u><span
|
||
lang=EN-US>
|
||
if (!(i&15) && k) {
|
||
// k !=0 </span><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD>̴<EFBFBD><EFBFBD>ڡ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>496</span></u><span
|
||
lang=EN-US>
|
||
k++,<u><span style='color:blue'>free</span></u>++; <b><i>/*
|
||
one page/process for task_struct */</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>497</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>printk</span></u>(<i>"Process %d: %d
|
||
pages\n\r"</i>,(i>>4)-1,k);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>498</span></u><span
|
||
lang=EN-US>
|
||
k = 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>499</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>500</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾϵͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>õ<EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܵ<EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>501</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>printk</span></u>(<i>"Memory found: %d (%d)\n\r"</i>,<u><span
|
||
style='color:blue'>free</span></u>-shared,total);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>502</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>503</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<div class=a align=center style='text-align:center'><span lang=EN-US>
|
||
|
||
<hr size=4 width="100%" align=center>
|
||
|
||
</span></div>
|
||
|
||
<p class=MsoNormal><span lang=EN-US> </span></p>
|
||
|
||
</div>
|
||
|
||
</body>
|
||
|
||
</html>
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