4049 lines
192 KiB
HTML
4049 lines
192 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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|
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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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|
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|
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{mso-style-name:"<22><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> Char";
|
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|
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|
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|
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span.Char8
|
||
{mso-style-name:"<22>Ĵ<EFBFBD><C4B4><EFBFBD><EFBFBD><EFBFBD> Char";
|
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mso-style-link:<EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
|
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font-family:"Times New Roman","serif";}
|
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p.af9, li.af9, div.af9
|
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{mso-style-name:<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
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span.Char9
|
||
{mso-style-name:"<22><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> Char";
|
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p.58, li.58, div.58
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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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|
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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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|
||
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|
||
span.HTMLChar
|
||
{mso-style-name:"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";
|
||
mso-style-link:"HTML Ԥ<><D4A4><EFBFBD>ʽ\,HTML Ԥ<>ȸ<EFBFBD>ʽ<EFBFBD><CABD>\,HTML Ԥ<>ȸ<EFBFBD>ʽ<EFBFBD><CABD>1\,HTML Ԥ<>ȸ<EFBFBD>ʽ<EFBFBD><CABD>2\,HTML Ԥ<>ȸ<EFBFBD>ʽ<EFBFBD><CABD>3";
|
||
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||
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|
||
{mso-style-name:"<22><>ע<EFBFBD><D7A2><EFBFBD><EFBFBD> Char";
|
||
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|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
|
||
font-weight:bold;}
|
||
span.Charf0
|
||
{mso-style-name:"<22><>ע<EFBFBD><D7A2><EFBFBD>ı<EFBFBD> Char";
|
||
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|
||
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|
||
span.3CharChar1
|
||
{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char1";
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
span.3CharChar3
|
||
{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char3";
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
.MsoChpDefault
|
||
{font-size:10.0pt;}
|
||
/* Page Definitions */
|
||
@page WordSection1
|
||
{size:595.3pt 841.9pt;
|
||
margin:72.0pt 54.0pt 72.0pt 54.0pt;
|
||
layout-grid:15.6pt;}
|
||
div.WordSection1
|
||
{page:WordSection1;}
|
||
/* List Definitions */
|
||
ol
|
||
{margin-bottom:0cm;}
|
||
ul
|
||
{margin-bottom:0cm;}
|
||
-->
|
||
</style>
|
||
|
||
</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="_Toc53320647"><span style='font-family:<3A><><EFBFBD><EFBFBD>'><EFBFBD><EFBFBD><EFBFBD><EFBFBD></span><span
|
||
lang=EN-US>12-14 linux/fs/exec.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/fs/exec.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> *
|
||
#!-checking implemented by tytso.</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>9</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>ʼ<EFBFBD>Ľű<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>벿<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>tytso</span>ʵ<EFBFBD>ֵġ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>10</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>11</span></u> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>12</span></u> <b><i> *
|
||
Demand-loading implemented 01.12.91 - no need to read anything but</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>13</span></u> <b><i> *
|
||
the header into memory. The inode of the executable is put into</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>14</span></u> <b><i> *
|
||
"current->executable", and page faults do the actual loading.
|
||
Clean.</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> *
|
||
Once more I can proudly say that linux stood up to being changed: it</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>17</span></u> <b><i> *
|
||
was less than 2 hours work to get demand-loading completely implemented.</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>18</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>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1991.12.1 - </span>ֻ<EFBFBD>轫ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>ͷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>뽫<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ؽ<EFBFBD><EFBFBD>ڴ档ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㱻<EFBFBD><EFBFBD><EFBFBD>ڵ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD>̵Ŀ<EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ֶ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * "current->executable"</span><EFBFBD><EFBFBD>ҳ<EFBFBD>쳣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD>ʼ<EFBFBD><EFBFBD>ز<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><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>ҿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>Ժ<EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><span
|
||
lang=EN-US>linux</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģ<EFBFBD>ֻ<EFBFBD><EFBFBD><EFBFBD>˲<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>2</span>Сʱ<EFBFBD>Ĺ<EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD>ȫʵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ش<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'>19</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>20</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>źŲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD>͡<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>21</span></u>
|
||
#include <errno.h> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϵͳ<EFBFBD>и<EFBFBD><EFBFBD>ֳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>š<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>22</span></u>
|
||
#include <string.h> // </span><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һЩ<EFBFBD>й<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƕ<EFBFBD>뺯<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>23</span></u>
|
||
#include <sys/stat.h> // </span><EFBFBD>ļ<EFBFBD>״̬ͷ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>״̬<EFBFBD>ṹ<span
|
||
lang=EN-US>stat{}</span><EFBFBD>ͷ<EFBFBD><EFBFBD>ų<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>24</span></u>
|
||
#include <a.out.h> // a.out</span>ͷ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>a.out</span>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>ʽ<EFBFBD><EFBFBD>һЩ<EFBFBD>ꡣ</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>25</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>26</span></u>
|
||
#include <linux/fs.h> // </span><EFBFBD>ļ<EFBFBD>ϵͳͷ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ṹ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>file</span><EFBFBD><EFBFBD><span lang=EN-US>m_inode</span><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>27</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><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>ݵȡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>28</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'>29</span></u>
|
||
#include <linux/mm.h> // </span><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һЩҳ<EFBFBD><EFBFBD><EFBFBD>ͷź<EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD>͡<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>30</span></u>
|
||
#include <asm/segment.h> // </span><EFBFBD>β<EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>йضμĴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƕ<EFBFBD><EFBFBD>ʽ<EFBFBD><EFBFBD>ຯ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>31</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>32</span></u>
|
||
extern int <u><span style='color:blue'>sys_exit</span></u>(int exit_code);
|
||
// </span><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϵͳ<EFBFBD><EFBFBD><EFBFBD>á<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>33</span></u>
|
||
extern int <u><span style='color:blue'>sys_close</span></u>(int fd);
|
||
// </span><EFBFBD>ر<EFBFBD><EFBFBD>ļ<EFBFBD>ϵͳ<EFBFBD><EFBFBD><EFBFBD>á<EFBFBD></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> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>36</span></u> <b><i> *
|
||
MAX_ARG_PAGES defines the number of pages allocated for arguments</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>37</span></u> <b><i> *
|
||
and envelope for the new program. 32 should suffice, this gives</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>38</span></u> <b><i> *
|
||
a maximum env+arg of 128kB !</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>39</span></u> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * MAX_ARG_PAGES</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD>³<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĸ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * 32</span>ҳ<EFBFBD>ڴ<EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD>㹻<EFBFBD>ˣ<EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>env+arg</span><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD><EFBFBD><EFBFBD>ܺʹﵽ<span lang=EN-US>128kB!</span></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>40</span></u>
|
||
#define <u><span style='color:blue'>MAX_ARG_PAGES</span></u> 32</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> //// </span>ʹ<EFBFBD>ÿ<EFBFBD><EFBFBD>ļ<EFBFBD>ϵͳ<EFBFBD><EFBFBD><EFBFBD>á<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>library
|
||
- </span><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѡ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>滻<EFBFBD><EFBFBD><EFBFBD>̵<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>ֶ<EFBFBD>ֵΪ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ָ<EFBFBD>롣<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>library</span>ָ<EFBFBD><EFBFBD>Ϊ<EFBFBD>գ<EFBFBD><EFBFBD><EFBFBD>ѽ<EFBFBD><EFBFBD>̵<EFBFBD>ǰ<EFBFBD>Ŀ<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>ͷŵ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>롣</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>42</span></u> int
|
||
<u><span style='color:blue'>sys_uselib</span></u>(const char * library)</span></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> <u><span style='color:blue'>44</span></u>
|
||
struct <u><span style='color:blue'>m_inode</span></u> * inode;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>45</span></u>
|
||
unsigned long base;</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>жϵ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD>ͨ<EFBFBD><EFBFBD><EFBFBD>̡<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͨ<EFBFBD><EFBFBD><EFBFBD>鿴<EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD>̵Ŀռ䳤<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ġ<EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>ͨ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>̵Ŀռ䳤<EFBFBD>ȱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>TASK_SIZE</span><EFBFBD><EFBFBD><span lang=EN-US>64MB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD>ռ䳤<EFBFBD>Ȳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>TASK_SIZE</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>루<EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><span lang=EN-US>inode</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>գ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>inode</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>NULL</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>47</span></u>
|
||
if (<u><span style='color:blue'>get_limit</span></u>(0x17) != <u><span
|
||
style='color:blue'>TASK_SIZE</span></u>)</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>48</span></u>
|
||
return -<u><span style='color:blue'>EINVAL</span></u>;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>49</span></u>
|
||
if (library) {</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>50</span></u>
|
||
if (!(inode=<u><span style='color:blue'>namei</span></u>(library)))
|
||
<b><i>/* get library inode */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>51</span></u>
|
||
return -<u><span style='color:blue'>ENOENT</span></u>;
|
||
/* </span>ȡ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>52</span></u>
|
||
} else</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>53</span></u>
|
||
inode = <u><span style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>54</span></u> <b><i>/*
|
||
we should check filetypes (headers etc), but we don't */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /* </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD>ü<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͣ<EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD>ȣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǻ<EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD>Żؽ<EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD>Ԥ<EFBFBD>ý<EFBFBD><EFBFBD>̿<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>ֶ<EFBFBD>Ϊ<EFBFBD>ա<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD>ý<EFBFBD><EFBFBD>̵Ŀ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>λ<EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD>ԭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD>õ<EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD>档<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ý<EFBFBD><EFBFBD>̿<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>ֶ<EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>¿<EFBFBD><span lang=EN-US>i</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>55</span></u>
|
||
<u><span style='color:blue'>iput</span></u>(<u><span style='color:blue'>current</span></u>->library);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>56</span></u>
|
||
<u><span style='color:blue'>current</span></u>->library = <u><span
|
||
style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>57</span></u>
|
||
base = <u><span style='color:blue'>get_base</span></u>(<u><span
|
||
style='color:blue'>current</span></u>->ldt[2]);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>58</span></u>
|
||
base += <u><span style='color:blue'>LIBRARY_OFFSET</span></u>;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>59</span></u>
|
||
<u><span style='color:blue'>free_page_tables</span></u>(base,<u><span
|
||
style='color:blue'>LIBRARY_SIZE</span></u>);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>60</span></u>
|
||
<u><span style='color:blue'>current</span></u>->library = inode;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>61</span></u>
|
||
return 0;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>62</span></u> }</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> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>65</span></u> <b><i> *
|
||
create_tables() parses the env- and arg-strings in new user</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>66</span></u> <b><i> *
|
||
memory and creates the pointer tables from them, and puts their</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>67</span></u> <b><i> *
|
||
addresses on the "stack", returning the new stack pointer value.</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> * create_tables()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>н<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɴ<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>ǵĵ<EFBFBD>ַ<EFBFBD>ŵ<EFBFBD><span
|
||
lang=EN-US>"</span>ջ<span lang=EN-US>"</span><EFBFBD>ϣ<EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ջ<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><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ջ<EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<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><span lang=EN-US>p
|
||
-</span><EFBFBD><EFBFBD><EFBFBD>ݶ<EFBFBD><EFBFBD>в<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣƫ<EFBFBD><EFBFBD>ָ<EFBFBD>룻<span lang=EN-US>argc - </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>envc
|
||
- </span><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>أ<EFBFBD>ջָ<EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>69</span></u>
|
||
static unsigned long * <u><span style='color:blue'>create_tables</span></u>(char
|
||
* p,int argc,int envc)</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 *<u><span style='color:blue'>argv</span></u>,*<u><span
|
||
style='color:blue'>envp</span></u>;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>72</span></u>
|
||
unsigned long * sp;</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>ջָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>4</span><EFBFBD>ֽڣ<EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD>ڣ<EFBFBD>Ϊ<EFBFBD>߽<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѱַ<EFBFBD>ģ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US> sp</span>Ϊ<span
|
||
lang=EN-US>4</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<span lang=EN-US>sp</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>λ<EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĩ<EFBFBD>ˡ<EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȱ<EFBFBD><span
|
||
lang=EN-US>sp </span><EFBFBD><EFBFBD><EFBFBD>£<EFBFBD><EFBFBD>͵<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƶ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ջ<EFBFBD>пճ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ָ<EFBFBD><EFBFBD>ռ<EFBFBD>õĿռ䣬<EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>envp </span>ָ<EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ճ<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>NULL</span>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD><span lang=EN-US>sp</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֽ<EFBFBD>ֵ<EFBFBD><EFBFBD><span lang=EN-US>4</span><EFBFBD>ֽڣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٰ<EFBFBD><span
|
||
lang=EN-US>sp</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƶ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ճ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>в<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>ռ<EFBFBD>õĿռ䣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>argv </span>ָ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>մ<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>һ<EFBFBD><EFBFBD><span lang=EN-US>NULL</span>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<span
|
||
lang=EN-US>sp</span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><span lang=EN-US>envp</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>в<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>Լ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>в<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD>ֱ<EFBFBD>ѹ<EFBFBD><EFBFBD>ջ<EFBFBD>С<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>74</span></u>
|
||
sp = (unsigned long *) (0xfffffffc & (unsigned long) p);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>75</span></u>
|
||
sp -= envc+1;
|
||
//
|
||
</span><EFBFBD><EFBFBD><span lang=EN-US>sp = sp - (envc+1);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>76</span></u>
|
||
<u><span style='color:blue'>envp</span></u> = sp;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>77</span></u>
|
||
sp -= argc+1;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>78</span></u>
|
||
<u><span style='color:blue'>argv</span></u> = sp;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>79</span></u>
|
||
<u><span style='color:blue'>put_fs_long</span></u>((unsigned long)<u><span
|
||
style='color:blue'>envp</span></u>,--sp);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>80</span></u>
|
||
<u><span style='color:blue'>put_fs_long</span></u>((unsigned long)<u><span
|
||
style='color:blue'>argv</span></u>,--sp);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>81</span></u>
|
||
<u><span style='color:blue'>put_fs_long</span></u>((unsigned long)argc,--sp);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ٽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>и<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>ֱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD>ճ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD>ط<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>NULL</span>ָ<EFBFBD>롣</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>82</span></u>
|
||
while (argc-->0) {</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>83</span></u>
|
||
<u><span style='color:blue'>put_fs_long</span></u>((unsigned long) p,<u><span
|
||
style='color:blue'>argv</span></u>++);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>84</span></u>
|
||
while (<u><span style='color:blue'>get_fs_byte</span></u>(p++)) <b><i>/*
|
||
nothing */</i></b> ; // p</span>ָ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>85</span></u>
|
||
}</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>86</span></u>
|
||
<u><span style='color:blue'>put_fs_long</span></u>(0,<u><span style='color:
|
||
blue'>argv</span></u>);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>87</span></u>
|
||
while (envc-->0) {</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>88</span></u>
|
||
<u><span style='color:blue'>put_fs_long</span></u>((unsigned long) p,<u><span
|
||
style='color:blue'>envp</span></u>++);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>89</span></u>
|
||
while (<u><span style='color:blue'>get_fs_byte</span></u>(p++)) <b><i>/*
|
||
nothing */</i></b> ; // p</span>ָ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>90</span></u>
|
||
}</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>91</span></u>
|
||
<u><span style='color:blue'>put_fs_long</span></u>(0,<u><span style='color:
|
||
blue'>envp</span></u>);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>92</span></u>
|
||
return sp;
|
||
// </span><EFBFBD><EFBFBD><EFBFBD>ع<EFBFBD><EFBFBD><EFBFBD>ĵ<EFBFBD>ǰ<EFBFBD><EFBFBD>ջָ<EFBFBD>롣</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> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>95</span></u> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>96</span></u> <b><i> *
|
||
count() counts the number of arguments/envelopes</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>97</span></u> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * count()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>в<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>/</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĸ<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></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>argv
|
||
- </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>飬<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>NULL</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ͳ<EFBFBD>Ʋ<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>ĸ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD>μ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // kernel/sched.c</span><EFBFBD>е<EFBFBD><span
|
||
lang=EN-US>171</span><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD>ע<EFBFBD>͡<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>98</span></u>
|
||
static int <u><span style='color:blue'>count</span></u>(char ** <u><span
|
||
style='color:blue'>argv</span></u>)</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> int i=0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>101</span></u><span
|
||
lang=EN-US> char ** tmp;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>102</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>103</span></u><span
|
||
lang=EN-US> if (tmp = <u><span
|
||
style='color:blue'>argv</span></u>)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>104</span></u><span
|
||
lang=EN-US>
|
||
while (<u><span style='color:blue'>get_fs_long</span></u>((unsigned long *)
|
||
(tmp++)))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>105</span></u><span
|
||
lang=EN-US>
|
||
i++;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>106</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>107</span></u><span
|
||
lang=EN-US> return i;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>108</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>109</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>110</span></u><span
|
||
lang=EN-US> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>111</span></u><span
|
||
lang=EN-US> <b><i> * 'copy_string()' copies argument/envelope strings from
|
||
user</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>112</span></u><span
|
||
lang=EN-US> <b><i> * memory to free pages in kernel mem. These are in a
|
||
format ready</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>113</span></u><span
|
||
lang=EN-US> <b><i> * to be put directly into the top of new user memory.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>114</span></u><span
|
||
lang=EN-US> <b><i> *</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>115</span></u><span
|
||
lang=EN-US> <b><i> * Modified by TYT, 11/24/91 to add the from_kmem argument, which specifies</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>116</span></u><span
|
||
lang=EN-US> <b><i> * whether the string and the string array are from user
|
||
or kernel segments:</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><u><span lang=EN-US style='color:blue'>118</span></u><span
|
||
lang=EN-US> <b><i> * from_kmem argv
|
||
* argv **</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>119</span></u><span
|
||
lang=EN-US> <b><i> *
|
||
0 user
|
||
space user space</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>120</span></u><span
|
||
lang=EN-US> <b><i> *
|
||
1 kernel space user
|
||
space</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>121</span></u><span
|
||
lang=EN-US> <b><i> *
|
||
2 kernel space
|
||
kernel space</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>122</span></u><span
|
||
lang=EN-US> <b><i> * </i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>123</span></u><span
|
||
lang=EN-US> <b><i> * We do this by playing games with the fs segment
|
||
register. Since it</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>124</span></u><span
|
||
lang=EN-US> <b><i> * it is expensive to load a segment register, we try to
|
||
avoid calling</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>125</span></u><span
|
||
lang=EN-US> <b><i> * set_fs() unless we absolutely have to.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>126</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> * 'copy_string()'</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>ڴ<EFBFBD>ռ俽<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>/</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں˿<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>С<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD>Щ<EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD>ӷŵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>еĸ<EFBFBD>ʽ<EFBFBD><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>TYT(Tytso)</span><EFBFBD><EFBFBD><span lang=EN-US>1991.11.24</span><EFBFBD><EFBFBD><EFBFBD>ģ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>from_kmem</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ò<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><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں˶Ρ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> *</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * from_kmem </span>ָ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>argv * </span><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US> argv **</span></p>
|
||
|
||
<p class=a><span lang=EN-US> *
|
||
0 </span><EFBFBD>û<EFBFBD><EFBFBD>ռ<EFBFBD><span lang=EN-US>
|
||
</span><EFBFBD>û<EFBFBD><EFBFBD>ռ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> *
|
||
1 </span><EFBFBD>ں˿ռ<EFBFBD><span lang=EN-US>
|
||
</span><EFBFBD>û<EFBFBD><EFBFBD>ռ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> *
|
||
2 </span><EFBFBD>ں˿ռ<EFBFBD><span lang=EN-US>
|
||
</span><EFBFBD>ں˿ռ<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>fs</span><EFBFBD>μĴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ġ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڼ<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>μĴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̫<EFBFBD>ߣ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>set_fs()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD>ڱ<EFBFBD>Ҫ<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>IJ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD><EFBFBD>С<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>argc
|
||
- </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӵIJ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>argv - </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>飻<span lang=EN-US>page -
|
||
</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD>ҳ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>顣<span lang=EN-US>p
|
||
-</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD><EFBFBD><EFBFBD>ƫ<EFBFBD><EFBFBD>ָ<EFBFBD>룬ʼ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>Ѹ<EFBFBD><EFBFBD>ƴ<EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>from_kmem -</span><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Դ<EFBFBD><EFBFBD>־<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD> <span lang=EN-US>do_execve()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><span
|
||
lang=EN-US>p</span><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>Ϊָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>(128kB)</span><EFBFBD>ռ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<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>Զ<EFBFBD>ջ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>и<EFBFBD><EFBFBD>ƴ<EFBFBD>ŵġ<EFBFBD><EFBFBD><EFBFBD><EFBFBD> <span
|
||
lang=EN-US>p</span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ÿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӷ<EFBFBD><EFBFBD><EFBFBD>С<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Դ<EFBFBD><EFBFBD>־<span
|
||
lang=EN-US>from_kmem</span>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>TYT</span>Ϊ<EFBFBD>˸<EFBFBD><span lang=EN-US>execve()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ִ<EFBFBD>нű<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>Ĺ<EFBFBD><EFBFBD>ܶ<EFBFBD><EFBFBD>¼ӵIJ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>нű<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>Ĺ<EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>в<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>ݿռ<EFBFBD><EFBFBD>С<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ䵱ǰͷ<EFBFBD><EFBFBD>ָ<EFBFBD>롣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>127</span></u><span
|
||
lang=EN-US> static unsigned long <u><span style='color:blue'>copy_strings</span></u>(int
|
||
argc,char ** <u><span style='color:blue'>argv</span></u>,unsigned long *page,</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>128</span></u><span
|
||
lang=EN-US>
|
||
unsigned long p, int from_kmem)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>129</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>130</span></u><span
|
||
lang=EN-US> char *tmp, *pag;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>131</span></u><span
|
||
lang=EN-US> int len, offset =
|
||
0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>132</span></u><span
|
||
lang=EN-US> unsigned long
|
||
old_fs, new_fs;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>133</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD>ǰ<EFBFBD>μĴ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>ds</span><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>ں<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݶΣ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>fs</span>ֵ<EFBFBD><EFBFBD><EFBFBD>ֱ𱣴浽<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>new_fs</span><EFBFBD><EFBFBD><span lang=EN-US>old_fs</span><EFBFBD>С<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>飨ָ<EFBFBD>룩<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں˿ռ䣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>fs</span><EFBFBD>μĴ<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>ں<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݶΡ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>134</span></u><span
|
||
lang=EN-US> if (!p)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>135</span></u><span
|
||
lang=EN-US>
|
||
return 0; <b><i>/* bullet-proofing */</i></b>
|
||
/* </span>ƫ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>֤<span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>136</span></u><span
|
||
lang=EN-US> new_fs = <u><span
|
||
style='color:blue'>get_ds</span></u>();</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>137</span></u><span
|
||
lang=EN-US> old_fs = <u><span
|
||
style='color:blue'>get_fs</span></u>();</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>138</span></u><span
|
||
lang=EN-US> if (from_kmem==2)
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں˿ռ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>fs</span>ָ<EFBFBD><EFBFBD><EFBFBD>ں˿ռ䡣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>139</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>set_fs</span></u>(new_fs);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD>ѭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD>ƣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD>ָ<EFBFBD><EFBFBD>ƫ<EFBFBD>Ƶ<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѭ<EFBFBD><EFBFBD><EFBFBD>У<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD>Ƶĵ<EFBFBD>ǰ<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>롣<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>ռ<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>飨<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>룩<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ں˿ռ䣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>fs</span><EFBFBD>μĴ<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>ں<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݶΣ<EFBFBD><span lang=EN-US>ds</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿռ<EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // tmp</span>֮<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ̻<EFBFBD><span
|
||
lang=EN-US>fs</span><EFBFBD>μĴ<EFBFBD><EFBFBD><EFBFBD>ԭֵ<EFBFBD><EFBFBD><span lang=EN-US>fs</span><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>ռ䣩<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>fs</span>ֵ<EFBFBD><EFBFBD>ֱ<EFBFBD>Ӵ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>û<EFBFBD><EFBFBD>ռ<EFBFBD>ȡ<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>뵽<span
|
||
lang=EN-US>tmp</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>140</span></u><span
|
||
lang=EN-US> while (argc-- >
|
||
0) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>141</span></u><span
|
||
lang=EN-US>
|
||
if (from_kmem == 1) // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں˿ռ䣬<EFBFBD><EFBFBD><span
|
||
lang=EN-US>fs</span>ָ<EFBFBD><EFBFBD><EFBFBD>ں˿ռ䡣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>142</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>set_fs</span></u>(new_fs);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>143</span></u><span
|
||
lang=EN-US>
|
||
if (!(tmp = (char *)<u><span style='color:blue'>get_fs_long</span></u>(((unsigned
|
||
long *)<u><span style='color:blue'>argv</span></u>)+argc)))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>144</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>panic</span></u>(<i>"argc is wrong"</i>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>145</span></u><span
|
||
lang=EN-US>
|
||
if (from_kmem == 1) // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں˿ռ䣬<EFBFBD><EFBFBD><span
|
||
lang=EN-US>fs</span>ָ<EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>ռ䡣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>146</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>set_fs</span></u>(old_fs);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>ռ<EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ò<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>len</span><EFBFBD><EFBFBD> <20>˺<EFBFBD><span lang=EN-US>tmp</span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD>ĩ<EFBFBD>ˡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD><EFBFBD>л<EFBFBD>ʣ<EFBFBD><EFBFBD>Ŀ<EFBFBD><EFBFBD>г<EFBFBD><EFBFBD>ȣ<EFBFBD><EFBFBD><EFBFBD>ռ䲻<EFBFBD><EFBFBD><EFBFBD>ˡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǻָ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // fs</span><EFBFBD>μĴ<EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>128KB</span><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><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>147</span></u><span
|
||
lang=EN-US>
|
||
len=0; <b><i>/*
|
||
remember zero-padding */</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>148</span></u><span
|
||
lang=EN-US>
|
||
do { /*
|
||
</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֪<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>NULL</span><EFBFBD>ֽڽ<EFBFBD>β<EFBFBD><EFBFBD><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>149</span></u><span
|
||
lang=EN-US>
|
||
len++;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>150</span></u><span
|
||
lang=EN-US> }
|
||
while (<u><span style='color:blue'>get_fs_byte</span></u>(tmp++));</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>151</span></u><span
|
||
lang=EN-US>
|
||
if (p-len < 0) { <b><i>/*
|
||
this shouldn't happen - 128kB */</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>152</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>set_fs</span></u>(old_fs);
|
||
/* </span><EFBFBD><EFBFBD><EFBFBD>ᷢ<EFBFBD><EFBFBD><span lang=EN-US>-</span><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><span lang=EN-US>128kB</span><EFBFBD>Ŀռ<EFBFBD><span
|
||
lang=EN-US> */</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>153</span></u><span
|
||
lang=EN-US>
|
||
return 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>154</span></u><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><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD>ذ<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD>ĩ<EFBFBD>˴<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѭ<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><EFBFBD><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD>жϲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧλ<EFBFBD>ô<EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD>档<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD>о<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>1</span>ҳ<EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD>档ƫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>offset</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>еĵ<EFBFBD>ǰָ<EFBFBD><EFBFBD>ƫ<EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD> <20><>Ϊ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>տ<EFBFBD>ʼִ<EFBFBD>б<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>ƫ<EFBFBD>Ʊ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>offset</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>Ϊ<span lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>(offset-1
|
||
< 0)</span><EFBFBD>϶<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // offset</span><EFBFBD><EFBFBD><EFBFBD>±<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>ǰ<span
|
||
lang=EN-US>p</span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>淶Χ<EFBFBD>ڵ<EFBFBD>ƫ<EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>155</span></u><span
|
||
lang=EN-US>
|
||
while (len) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>156</span></u><span
|
||
lang=EN-US>
|
||
--p; --tmp; --len;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>157</span></u><span
|
||
lang=EN-US>
|
||
if (--offset < 0) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>158</span></u><span
|
||
lang=EN-US>
|
||
offset = p % <u><span style='color:blue'>PAGE_SIZE</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>159</span></u><span
|
||
lang=EN-US>
|
||
if (from_kmem==2) // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں˿ռ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>fs</span>ָ<EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>ռ䡣 </p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>160</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>set_fs</span></u>(old_fs);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰƫ<EFBFBD><EFBFBD>ֵ<span
|
||
lang=EN-US>p</span><EFBFBD><EFBFBD><EFBFBD>ڵĴ<EFBFBD><EFBFBD>ռ<EFBFBD>ҳ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <span lang=EN-US>page[p/PAGE_SIZE] ==0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD>ʱ<span
|
||
lang=EN-US>p</span>ָ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀռ<EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD>滹<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>飬ͬ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ʱҲʹҳ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>pag</span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>档<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>벻<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>161</span></u><span
|
||
lang=EN-US>
|
||
if (!(pag = (char *) page[p/<u><span style='color:blue'>PAGE_SIZE</span></u>])
|
||
&&</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>162</span></u><span
|
||
lang=EN-US>
|
||
!(pag = (char *) page[p/<u><span style='color:blue'>PAGE_SIZE</span></u>] =</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>163</span></u><span
|
||
lang=EN-US>
|
||
(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'>164</span></u><span
|
||
lang=EN-US>
|
||
return 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>165</span></u><span
|
||
lang=EN-US>
|
||
if (from_kmem==2) // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں˿ռ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>fs</span>ָ<EFBFBD><EFBFBD><EFBFBD>ں˿ռ䡣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>166</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>set_fs</span></u>(new_fs);</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>
|
||
}</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>fs</span><EFBFBD><EFBFBD><EFBFBD>и<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD>ֽڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD><span lang=EN-US>pag</span><EFBFBD><EFBFBD><span lang=EN-US>offset</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>169</span></u><span
|
||
lang=EN-US>
|
||
*(pag + offset) = <u><span style='color:blue'>get_fs_byte</span></u>(tmp);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>170</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>171</span></u><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><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں˿ռ䣬<EFBFBD><EFBFBD>ָ<EFBFBD><span
|
||
lang=EN-US>fs</span><EFBFBD>μĴ<EFBFBD><EFBFBD><EFBFBD>ԭֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ز<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѹ<EFBFBD><EFBFBD>Ʋ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD>ƫ<EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>172</span></u><span
|
||
lang=EN-US> if (from_kmem==2)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>173</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>set_fs</span></u>(old_fs);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>174</span></u><span
|
||
lang=EN-US> return p;</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> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ľֲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ľֲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>LDT</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ķλ<EFBFBD>ַ<EFBFBD>Ͷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݶ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ĩ<EFBFBD>ˡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>text_size
|
||
- </span>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>ͷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>a_text</span><EFBFBD>ֶθ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD>γ<EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // page - </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD>ҳ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>顣</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݶ<EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>64MB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>177</span></u><span
|
||
lang=EN-US> static unsigned long <u><span style='color:blue'>change_ldt</span></u>(unsigned
|
||
long text_size,unsigned long * page)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>178</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>179</span></u><span
|
||
lang=EN-US> unsigned long
|
||
code_limit,data_limit,code_base,data_base;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>180</span></u><span
|
||
lang=EN-US> int i;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>181</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ȰѴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݶγ<EFBFBD><EFBFBD>Ⱦ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>64MB</span><EFBFBD><EFBFBD> Ȼ<><C8BB>ȡ<EFBFBD><C8A1>ǰ<EFBFBD><C7B0><EFBFBD>ֲ̾<CCBE><D6B2><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>λ<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݶλ<EFBFBD>ַ<EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Щ<EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>þֲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD>κ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>еĻ<EFBFBD>ַ<EFBFBD>Ͷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ע<EFBFBD>⣬<EFBFBD><EFBFBD><EFBFBD>ڱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ص<EFBFBD><EFBFBD>³<EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݶλ<EFBFBD>ַ<EFBFBD><EFBFBD>ԭ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD>б<EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD>ظ<EFBFBD>ȥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>186</span><EFBFBD><EFBFBD><span lang=EN-US>188</span><EFBFBD><EFBFBD><EFBFBD>ϵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>öλ<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>࣬<EFBFBD><EFBFBD>ʡ<EFBFBD>ԡ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>182</span></u><span
|
||
lang=EN-US> code_limit = <u><span
|
||
style='color:blue'>TASK_SIZE</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>183</span></u><span
|
||
lang=EN-US> data_limit = <u><span
|
||
style='color:blue'>TASK_SIZE</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>184</span></u><span
|
||
lang=EN-US> code_base = <u><span
|
||
style='color:blue'>get_base</span></u>(<u><span style='color:blue'>current</span></u>->ldt[1]);
|
||
// include/linux/sched.h</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>226</span><EFBFBD>С<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>185</span></u><span
|
||
lang=EN-US> data_base =
|
||
code_base;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>186</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>set_base</span></u>(<u><span style='color:blue'>current</span></u>->ldt[1],code_base);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>187</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>set_limit</span></u>(<u><span style='color:blue'>current</span></u>->ldt[1],code_limit);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>188</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>set_base</span></u>(<u><span style='color:blue'>current</span></u>->ldt[2],data_base);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>189</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>set_limit</span></u>(<u><span style='color:blue'>current</span></u>->ldt[2],data_limit);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>190</span></u><span
|
||
lang=EN-US> <b><i>/* make sure fs points to the NEW data segment */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /* </span>Ҫȷ<EFBFBD><EFBFBD><span lang=EN-US>fs</span><EFBFBD>μĴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>µ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݶ<EFBFBD><span
|
||
lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // fs</span><EFBFBD>μĴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>з<EFBFBD><EFBFBD><EFBFBD>ֲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݶ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѡ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>(0x17)</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>fs</span><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݶΡ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>191</span></u><span
|
||
lang=EN-US> __asm__(<i>"pushl
|
||
$0x17\n\tpop %%fs"</i>::);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD><EFBFBD>Ѵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݵ<EFBFBD>ҳ<EFBFBD>棨<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>MAX_ARG_PAGES</span>ҳ<EFBFBD><EFBFBD><span lang=EN-US>128kB</span><EFBFBD><EFBFBD><EFBFBD>ŵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݶ<EFBFBD>ĩ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ˡ<EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD>Ǵӽ<C7B4><D3BD>̿ռ<CCBF><D5BC><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD>ÿ<EFBFBD>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һҳһҳ<D2BB>طš<D8B7><C5A1><EFBFBD><EFBFBD>ļ<EFBFBD><C4BC><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD>ý<EFBFBD><C3BD>̿ռ<CCBF><D5BC><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // 4MB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>put_dirty_page()</span><EFBFBD><EFBFBD><EFBFBD>ڰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ӳ<EFBFBD>䵽<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD><EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>mm/memory.c</span><EFBFBD>С<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>192</span></u><span
|
||
lang=EN-US> data_base +=
|
||
data_limit - <u><span style='color:blue'>LIBRARY_SIZE</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>193</span></u><span
|
||
lang=EN-US> for (i=<u><span
|
||
style='color:blue'>MAX_ARG_PAGES</span></u>-1 ; i>=0 ; i--) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>194</span></u><span
|
||
lang=EN-US>
|
||
data_base -= <u><span style='color:blue'>PAGE_SIZE</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>195</span></u><span
|
||
lang=EN-US>
|
||
if (page[i])
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڣ<EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD>ø<EFBFBD>ҳ<EFBFBD>档</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>196</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>put_dirty_page</span></u>(page[i],data_base);</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> return data_limit;
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݶ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>64MB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>199</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>200</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>201</span></u><span
|
||
lang=EN-US> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>202</span></u><span
|
||
lang=EN-US> <b><i> * 'do_execve()' executes a new program.</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><u><span lang=EN-US style='color:blue'>204</span></u><span
|
||
lang=EN-US> <b><i> * NOTE! We leave 4MB free at the top of the data-area
|
||
for a loadable</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>205</span></u><span
|
||
lang=EN-US> <b><i> * library.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>206</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> * 'do_execve()'</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>³<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// execve()</span>ϵͳ<EFBFBD>жϵ<EFBFBD><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ز<EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ӽ<EFBFBD><EFBFBD>̣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϵͳ<EFBFBD>жϵ<EFBFBD><EFBFBD>ã<EFBFBD><span
|
||
lang=EN-US>int 0x80</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܺ<EFBFBD><span lang=EN-US>__NR_execve</span><EFBFBD><EFBFBD><EFBFBD>õĺ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>IJ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǽ<EFBFBD><EFBFBD><EFBFBD>ϵͳ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̺<EFBFBD>ֱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ñ<EFBFBD>ϵͳ<EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̣<EFBFBD><span
|
||
lang=EN-US>system_call.s</span><EFBFBD><EFBFBD><span lang=EN-US>200</span><EFBFBD>У<EFBFBD><EFBFBD>͵<EFBFBD><EFBFBD>ñ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֮ǰ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>system_call.s</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>203</span><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD>ѹ<EFBFBD><EFBFBD>ջ<EFBFBD>е<EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Щֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD> <20><><span lang=EN-US>86--88</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѵ<EFBFBD><span
|
||
lang=EN-US>edx</span><EFBFBD><EFBFBD><span lang=EN-US>ecx</span><EFBFBD><EFBFBD><span lang=EN-US>ebx</span><EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD><EFBFBD>Ӧ<span
|
||
lang=EN-US>**envp</span><EFBFBD><EFBFBD><span lang=EN-US>**argv</span><EFBFBD><EFBFBD><span lang=EN-US>*filename</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD> <20><><span lang=EN-US>94</span><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>sys_call_table</span><EFBFBD><EFBFBD><span lang=EN-US>sys_execve</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>룩ʱѹ<EFBFBD><EFBFBD>ջ<EFBFBD>ĺ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ص<EFBFBD>ַ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>tmp</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD> <20><><span lang=EN-US>202</span><EFBFBD><EFBFBD><EFBFBD>ڵ<EFBFBD><EFBFBD>ñ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>do_execve</span>ǰ<EFBFBD><EFBFBD>ջ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>ջ<EFBFBD>е<EFBFBD><EFBFBD><EFBFBD>ϵͳ<EFBFBD>жϵij<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><span lang=EN-US>eip</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // eip - </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϵͳ<EFBFBD>жϵij<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>룬<EFBFBD>μ<EFBFBD><span
|
||
lang=EN-US>kernel/system_call.s</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // tmp - </span>ϵͳ<EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>_sys_execve</span>ʱ<EFBFBD>ķ<EFBFBD><EFBFBD>ص<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ã<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // filename - </span><EFBFBD><EFBFBD>ִ<EFBFBD>г<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>룻</p>
|
||
|
||
<p class=a><span lang=EN-US> // argv - </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>в<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>룻</p>
|
||
|
||
<p class=a><span lang=EN-US> // envp - </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>롣</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>óɹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ó<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ţ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>-1</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>207</span></u><span
|
||
lang=EN-US> int <u><span style='color:blue'>do_execve</span></u>(unsigned long
|
||
* eip,long tmp,char * filename,</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>208</span></u><span
|
||
lang=EN-US> char ** <u><span
|
||
style='color:blue'>argv</span></u>, char ** <u><span style='color:blue'>envp</span></u>)</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> struct <u><span
|
||
style='color:blue'>m_inode</span></u> * inode;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>211</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>buffer_head</span></u> * bh;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>212</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>exec</span></u> ex;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>213</span></u><span
|
||
lang=EN-US> unsigned long page[<u><span
|
||
style='color:blue'>MAX_ARG_PAGES</span></u>];
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD>ҳ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>顣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>214</span></u><span
|
||
lang=EN-US> int i,argc,envc;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>215</span></u><span
|
||
lang=EN-US> int e_uid, e_gid;
|
||
// </span><EFBFBD><EFBFBD>Ч<EFBFBD>û<EFBFBD><span lang=EN-US>ID</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD><span lang=EN-US>ID</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>216</span></u><span
|
||
lang=EN-US> int retval;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>217</span></u><span
|
||
lang=EN-US> int sh_bang = 0;
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD>Ҫִ<EFBFBD>нű<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>218</span></u><span
|
||
lang=EN-US> unsigned long p=<u><span
|
||
style='color:blue'>PAGE_SIZE</span></u>*<u><span style='color:blue'>MAX_ARG_PAGES</span></u>-4;
|
||
// p</span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>219</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>л<EFBFBD><EFBFBD><EFBFBD>֮ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȸ<EFBFBD>Щ<EFBFBD><EFBFBD><EFBFBD>¡<EFBFBD><EFBFBD>ں<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>128KB</span><EFBFBD><EFBFBD><span lang=EN-US>32</span><EFBFBD><EFBFBD>ҳ<EFBFBD>棩</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ռ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ż<EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>в<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>а<EFBFBD><span
|
||
lang=EN-US>p</span><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD>ó<EFBFBD>λ<EFBFBD><EFBFBD><span lang=EN-US>128KB</span><EFBFBD>ռ<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>ִ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڳ<EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD>IJ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><span
|
||
lang=EN-US>p</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>128KB</span><EFBFBD>ռ<EFBFBD><EFBFBD>еĵ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ǰλ<EFBFBD>á<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>⣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>eip[1]</span><EFBFBD>ǵ<EFBFBD><EFBFBD>ñ<EFBFBD><EFBFBD><EFBFBD>ϵͳ<EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD>ԭ<EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>μĴ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>CS</span>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>еĶ<EFBFBD>ѡ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǵ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0x000f</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǹ<EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<span
|
||
lang=EN-US> CS</span>ֻ<EFBFBD>ܻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں˴<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ε<EFBFBD>ѡ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>
|
||
0x0008</span><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD>Ǿ<EFBFBD><C7BE>Բ<EFBFBD><D4B2><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģ<EFBFBD><C4A3><EFBFBD>Ϊ<EFBFBD>ں˴<DABA><CBB4><EFBFBD><EFBFBD>dz<EFBFBD>פ<EFBFBD>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD><EFBFBD>ܱ<EFBFBD><DCB1>滻<EFBFBD><E6BBBB><EFBFBD>ġ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>eip[1] </span><EFBFBD><EFBFBD>ֵȷ<EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD>ٳ<EFBFBD>ʼ<EFBFBD><EFBFBD><span lang=EN-US>128KB</span><EFBFBD>IJ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>䣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>㣬<EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㡣<EFBFBD>ٸ<EFBFBD><EFBFBD>ݺ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>в<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĸ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>argc</span><EFBFBD><EFBFBD><span lang=EN-US>envc</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>⣬ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>dz<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>220</span></u><span
|
||
lang=EN-US> if ((0xffff &
|
||
eip[1]) != 0x000f)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>221</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>panic</span></u>(<i>"execve called from
|
||
supervisor mode"</i>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>222</span></u><span
|
||
lang=EN-US> for (i=0 ; i<<u><span
|
||
style='color:blue'>MAX_ARG_PAGES</span></u> ;
|
||
i++) <b><i>/* clear page-table */</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>223</span></u><span
|
||
lang=EN-US>
|
||
page[i]=0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>224</span></u><span
|
||
lang=EN-US> if (!(inode=<u><span
|
||
style='color:blue'>namei</span></u>(filename)))
|
||
<b><i>/* get executables inode */</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>225</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>ENOENT</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>226</span></u><span
|
||
lang=EN-US> argc = <u><span
|
||
style='color:blue'>count</span></u>(<u><span style='color:blue'>argv</span></u>);
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>в<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>227</span></u><span
|
||
lang=EN-US> envc = <u><span
|
||
style='color:blue'>count</span></u>(<u><span style='color:blue'>envp</span></u>);
|
||
// </span><EFBFBD><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'>228</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>229</span></u><span
|
||
lang=EN-US> restart_interp:</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>230</span></u><span
|
||
lang=EN-US> if (!<u><span
|
||
style='color:blue'>S_ISREG</span></u>(inode->i_mode)) { <b><i>/*
|
||
must be regular file */</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>231</span></u><span
|
||
lang=EN-US>
|
||
retval = -<u><span style='color:blue'>EACCES</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>232</span></u><span
|
||
lang=EN-US>
|
||
goto exec_error2; //</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>dz<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ó<EFBFBD><EFBFBD><EFBFBD><EFBFBD>룬<EFBFBD><EFBFBD>ת<EFBFBD><EFBFBD><span
|
||
lang=EN-US>376</span><EFBFBD>С<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>233</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>鵱ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD>Ȩ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD>Ȩִ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڰ<EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֶ<EFBFBD>ֵȡ<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>к<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȳ鿴<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ˡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>-</span><EFBFBD>û<EFBFBD><span lang=EN-US>-ID</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>set-user_id</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>־
|
||
<EFBFBD>͡<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>-</span><EFBFBD><EFBFBD><span lang=EN-US>-ID</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>set-group-id</span><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>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>ܹ<EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȩ<EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD>糬<EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><span
|
||
lang=EN-US>root</span><EFBFBD><EFBFBD><EFBFBD>ij<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ij<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>passwd</span><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>set-user-id</span><EFBFBD><EFBFBD>־<EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD>н<EFBFBD><EFBFBD>̵<EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD>û<EFBFBD><span lang=EN-US>ID</span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>euid</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ó<EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><span
|
||
lang=EN-US>ID</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>óɵ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD>̵<EFBFBD><span lang=EN-US>euid</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><span
|
||
lang=EN-US>set-group-id</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>λ<EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD>н<EFBFBD><EFBFBD>̵<EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD><span
|
||
lang=EN-US>ID</span><EFBFBD><EFBFBD><span lang=EN-US>egid</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>ID</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>óɵ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>egid</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>жϳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڱ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>e_uid</span><EFBFBD><EFBFBD><span lang=EN-US>e_gid</span><EFBFBD>С<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>234</span></u><span
|
||
lang=EN-US> i =
|
||
inode->i_mode;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>235</span></u><span
|
||
lang=EN-US> e_uid = (i & <u><span
|
||
style='color:blue'>S_ISUID</span></u>) ? inode->i_uid : <u><span
|
||
style='color:blue'>current</span></u>->euid;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>236</span></u><span
|
||
lang=EN-US> e_gid = (i & <u><span
|
||
style='color:blue'>S_ISGID</span></u>) ? inode->i_gid : <u><span
|
||
style='color:blue'>current</span></u>->egid;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ڸ<EFBFBD><EFBFBD>ݽ<EFBFBD><EFBFBD>̵<EFBFBD><span
|
||
lang=EN-US>euid</span><EFBFBD><EFBFBD><span lang=EN-US>egid</span><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>ķ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Խ<EFBFBD><EFBFBD>бȽϡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>н<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<span
|
||
lang=EN-US>i</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>6</span>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>3</span>λ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ķ<EFBFBD><EFBFBD><EFBFBD>Ȩ<EFBFBD>ޱ<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>ļ<EFBFBD><EFBFBD>뵱ǰ<EFBFBD><EFBFBD><EFBFBD>̵<EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD>飬<EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>3</span>λ<EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>ķ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȩ<EFBFBD>ޱ<EFBFBD>־<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>3</span>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʸ<EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>Ȩ<EFBFBD>ޡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>3</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD>жϵ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD>Ȩ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ѡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD>û<EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>и<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>Ȩ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD>Ȩ<EFBFBD>ޣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD>Ҳû<EFBFBD><EFBFBD><EFBFBD>κ<EFBFBD>Ȩ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ߵ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD>dz<EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>Ȩ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ò<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ִ<EFBFBD>г<EFBFBD><EFBFBD><EFBFBD><EFBFBD>룬<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ת<EFBFBD><EFBFBD><span
|
||
lang=EN-US>exec_error2</span><EFBFBD><EFBFBD>ȥ<EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>237</span></u><span
|
||
lang=EN-US> if (<u><span
|
||
style='color:blue'>current</span></u>->euid == inode->i_uid)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>238</span></u><span
|
||
lang=EN-US>
|
||
i >>= 6;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>239</span></u><span
|
||
lang=EN-US> else if (<u><span
|
||
style='color:blue'>in_group_p</span></u>(inode->i_gid))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>240</span></u><span
|
||
lang=EN-US>
|
||
i >>= 3;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>241</span></u><span
|
||
lang=EN-US> if (!(i & 1)
|
||
&&</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>242</span></u><span
|
||
lang=EN-US>
|
||
!((inode->i_mode & 0111) && <u><span style='color:blue'>suser</span></u>()))
|
||
{</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>243</span></u><span
|
||
lang=EN-US>
|
||
retval = -<u><span style='color:blue'>ENOEXEC</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>244</span></u><span
|
||
lang=EN-US> goto
|
||
exec_error2;</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><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>Ȩ<EFBFBD>ޡ<EFBFBD><EFBFBD><EFBFBD>˴<EFBFBD><EFBFBD><EFBFBD><EFBFBD>￪ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫȡ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>ͷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>л<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>shell</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>нű<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȶ<EFBFBD>ȡִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD>ƻ<EFBFBD><C6BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݵ<EFBFBD><span lang=EN-US>ex</span><EFBFBD>С<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><span
|
||
lang=EN-US>'#!'</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>ű<EFBFBD><EFBFBD>ı<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>нű<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǿ<EFBFBD><EFBFBD><EFBFBD>Ҫִ<EFBFBD>нű<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>Ľ<EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>shell</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͨ<EFBFBD><EFBFBD><EFBFBD>ű<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>ĵ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>һ<EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>Ϊ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>#</span><EFBFBD><EFBFBD><span lang=EN-US>/bin/bash</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>нű<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD>Ľ<EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>з<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǵӽű<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>1</span><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><span
|
||
lang=EN-US>'#!'</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>еĽ<EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>IJ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>еĻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Щ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͽű<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ž<EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD>ǽ<EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>в<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD><EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֮ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD>Ҫ<EFBFBD>ȰѺ<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>в<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ŵ<EFBFBD><span
|
||
lang=EN-US>128KB</span><EFBFBD>ռ<EFBFBD><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ｨ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>в<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ŵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD>λ<EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں<EFBFBD>ִ<EFBFBD>нű<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>Ľ<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>úý<EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD>Ľű<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㲢<EFBFBD><EFBFBD>ת<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // 229</span><EFBFBD><EFBFBD>ȥִ<EFBFBD>н<EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD>ת<EFBFBD><EFBFBD>ִ<EFBFBD>й<EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>229</span><EFBFBD><EFBFBD>ȥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȷ<EFBFBD>ϲ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>˽ű<EFBFBD><EFBFBD>ļ<EFBFBD>֮<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֹ<EFBFBD>ٴ<EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ľű<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>־<span
|
||
lang=EN-US>sh_bang </span><EFBFBD><EFBFBD><EFBFBD>ں<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>иñ<EFBFBD>־Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ú<EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>в<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD>ظ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>á<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>246</span></u><span
|
||
lang=EN-US> if (!(bh = <u><span
|
||
style='color:blue'>bread</span></u>(inode->i_dev,inode->i_zone[0]))) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>247</span></u><span
|
||
lang=EN-US>
|
||
retval = -<u><span style='color:blue'>EACCES</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>248</span></u><span
|
||
lang=EN-US>
|
||
goto exec_error2;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>249</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>250</span></u><span
|
||
lang=EN-US> ex = *((struct <u><span
|
||
style='color:blue'>exec</span></u> *) bh->b_data); <b><i>/*
|
||
read exec-header */</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>251</span></u><span
|
||
lang=EN-US> if
|
||
((bh->b_data[0] == <i>'#'</i>) && (bh->b_data[1] == <i>'!'</i>)
|
||
&& (!sh_bang)) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>252</span></u><span
|
||
lang=EN-US>
|
||
<b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>253</span></u><span
|
||
lang=EN-US> <b><i> *
|
||
This section does the #! interpretation.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>254</span></u><span
|
||
lang=EN-US> <b><i> *
|
||
Sorta complicated, but hopefully it will work. -TYT</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>255</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>ⲿ<EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>'#!'</span><EFBFBD>Ľ<EFBFBD><EFBFBD>ͣ<EFBFBD><EFBFBD><EFBFBD>Щ<EFBFBD><EFBFBD><EFBFBD>ӣ<EFBFBD><EFBFBD><EFBFBD>ϣ<EFBFBD><EFBFBD><EFBFBD>ܹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>-TYT</span></p>
|
||
|
||
<p class=a><span lang=EN-US>
|
||
*/</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>256</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>257</span></u><span
|
||
lang=EN-US>
|
||
char <u><span style='color:blue'>buf</span></u>[128], *cp, *interp, *i_name,
|
||
*i_arg;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>258</span></u><span
|
||
lang=EN-US>
|
||
unsigned long old_fs;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>259</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>￪ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǵӽű<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѽ<EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD>IJ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ͽű<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϸ<EFBFBD><EFBFBD>뻷<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȸ<EFBFBD><EFBFBD>ƽű<EFBFBD><EFBFBD>ļ<EFBFBD>ͷ<span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><span lang=EN-US>'#!'</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>buf</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD>к<EFBFBD><EFBFBD>нű<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>/bin/sh</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD>ܻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // buf</span><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݽ<EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD>Ŀո<EFBFBD><EFBFBD>Ʊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>260</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>strncpy</span></u>(<u><span style='color:blue'>buf</span></u>,
|
||
bh->b_data+2, 127);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>261</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>262</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(inode);
|
||
// </span><EFBFBD>ͷŻ<EFBFBD><EFBFBD><EFBFBD>鲢<EFBFBD>Żؽű<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'>263</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>buf</span></u>[127] = <i>'\0'</i>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>264</span></u><span
|
||
lang=EN-US>
|
||
if (cp = <u><span style='color:blue'>strchr</span></u>(<u><span
|
||
style='color:blue'>buf</span></u>, <i>'\n'</i>)) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>265</span></u><span
|
||
lang=EN-US>
|
||
*cp = <i>'\0'</i>; // </span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>з<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>NULL</span><EFBFBD><EFBFBD>ȥ<EFBFBD><EFBFBD><EFBFBD>ո<EFBFBD><EFBFBD>Ʊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>266</span></u><span
|
||
lang=EN-US>
|
||
for (cp = <u><span style='color:blue'>buf</span></u>; (*cp == <i>' '</i>) ||
|
||
(*cp == <i>'\t'</i>); cp++);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>267</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>268</span></u><span
|
||
lang=EN-US>
|
||
if (!cp || *cp == <i>'\0'</i>) { // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>269</span></u><span
|
||
lang=EN-US>
|
||
retval = -<u><span style='color:blue'>ENOEXEC</span></u>; <b><i>/*
|
||
No interpreter name found */</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>270</span></u><span
|
||
lang=EN-US>
|
||
goto exec_error1; /* </span>û<EFBFBD><EFBFBD><EFBFBD>ҵ<EFBFBD><EFBFBD>ű<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US> */</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><span lang=EN-US> // </span><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD>ǵõ<EFBFBD><EFBFBD>˿<EFBFBD>ͷ<EFBFBD>ǽű<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݣ<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD>ǽ<EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<span
|
||
lang=EN-US>i_name</span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ơ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ǽ<EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD>IJ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i_arg</span>ָ<EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>272</span></u><span
|
||
lang=EN-US>
|
||
interp = i_name = cp;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>273</span></u><span
|
||
lang=EN-US>
|
||
i_arg = 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>274</span></u><span
|
||
lang=EN-US>
|
||
for ( ; *cp && (*cp != <i>' '</i>) && (*cp != <i>'\t'</i>);
|
||
cp++) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>275</span></u><span
|
||
lang=EN-US>
|
||
if (*cp == <i>'/'</i>)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>276</span></u><span
|
||
lang=EN-US>
|
||
i_name = cp+1;</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><u><span lang=EN-US style='color:blue'>278</span></u><span
|
||
lang=EN-US>
|
||
if (*cp) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>279</span></u><span
|
||
lang=EN-US>
|
||
*cp++ = <i>'\0'</i>;
|
||
// </span><EFBFBD><EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>β<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>NULL</span><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>280</span></u><span
|
||
lang=EN-US>
|
||
i_arg = cp;
|
||
// i_arg</span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>281</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>282</span></u><span
|
||
lang=EN-US>
|
||
<b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>283</span></u><span
|
||
lang=EN-US> <b><i> *
|
||
OK, we've parsed out the interpreter name and</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>284</span></u><span
|
||
lang=EN-US> <b><i> *
|
||
(optional) argument.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>285</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>
|
||
* OK</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Լ<EFBFBD><span lang=EN-US>(</span><EFBFBD><EFBFBD>ѡ<EFBFBD><EFBFBD><span lang=EN-US>)</span><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><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ľ<EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i_name </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i_arg </span><EFBFBD>ͽű<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD>ͳ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>IJ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ž<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD>Ѻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ṩ<EFBFBD><EFBFBD>ԭ<EFBFBD><EFBFBD>һЩ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ȷŽ<EFBFBD>ȥ<EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD>ٷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ġ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>в<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD><EFBFBD><EFBFBD>IJ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>"-arg1</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // -arg2"</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>"bash"</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>"-iarg1
|
||
-iarg2"</span><EFBFBD><EFBFBD><EFBFBD>ű<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭ<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><span lang=EN-US>"example.sh"</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD>ڷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>IJ<EFBFBD><EFBFBD><EFBFBD>֮<EFBFBD><EFBFBD><EFBFBD>µ<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><span lang=EN-US>bash
|
||
-iarg1 -iarg2 example.sh -arg1 -arg2<span
|
||
lang=EN-US><span lang=EN-US><EFBFBD><EFBFBD></span></span></span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><span lang=EN-US>sh_bang</span><EFBFBD><EFBFBD>־<EFBFBD><EFBFBD><EFBFBD>ϣ<EFBFBD>Ȼ<EFBFBD><EFBFBD>Ѻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ṩ<EFBFBD><EFBFBD>ԭ<EFBFBD>в<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>뵽<EFBFBD>ռ<EFBFBD><EFBFBD>С<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>envc </span><EFBFBD><EFBFBD><span lang=EN-US>argc-1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٸ<EFBFBD><EFBFBD>Ƶ<EFBFBD>һ<EFBFBD><EFBFBD>ԭ<EFBFBD>в<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭ<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><EFBFBD><EFBFBD><EFBFBD>Ľű<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>[[?? </span><EFBFBD><EFBFBD><EFBFBD>Կ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Dz<EFBFBD><EFBFBD><EFBFBD>Ҫȥ<EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ű<EFBFBD><EFBFBD>ļ<EFBFBD><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>Ը<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>argc</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڵĽű<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD>ͬ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>һ<EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>
|
||
]]</span><EFBFBD><EFBFBD>ע<EFBFBD>⣡<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><span lang=EN-US>p</span><EFBFBD><EFBFBD><EFBFBD>Ÿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD>Ӷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƶ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ƴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD>λ<EFBFBD>ڳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>в<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϸ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
||
<span lang=EN-US>p</span>ָ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĵ<EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>copy_strings()</span><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>ռ䡣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>286</span></u><span
|
||
lang=EN-US>
|
||
if (sh_bang++ == 0) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>287</span></u><span
|
||
lang=EN-US>
|
||
p = <u><span style='color:blue'>copy_strings</span></u>(envc, <u><span
|
||
style='color:blue'>envp</span></u>, page, p, 0);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>288</span></u><span
|
||
lang=EN-US>
|
||
p = <u><span style='color:blue'>copy_strings</span></u>(--argc, <u><span
|
||
style='color:blue'>argv</span></u>+1, page, p, 0);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>289</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>290</span></u><span
|
||
lang=EN-US>
|
||
<b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>291</span></u><span
|
||
lang=EN-US> <b><i> *
|
||
Splice in (1) the interpreter's name for argv[0]</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>292</span></u><span
|
||
lang=EN-US> <b><i> *
|
||
(2) (optional) argument to interpreter</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>293</span></u><span
|
||
lang=EN-US> <b><i> *
|
||
(3) filename of shell script</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>294</span></u><span
|
||
lang=EN-US> <b><i> *</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>295</span></u><span
|
||
lang=EN-US> <b><i> *
|
||
This is done in reverse order, because of how the</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>296</span></u><span
|
||
lang=EN-US> <b><i> *
|
||
user environment and arguments are stored.</i></b></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><span lang=EN-US>
|
||
/*</span></p>
|
||
|
||
<p class=a><span lang=EN-US>
|
||
* </span>ƴ<EFBFBD><EFBFBD><span lang=EN-US> (1) argv[0]</span><EFBFBD>зŽ<EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US>
|
||
* (2) (</span><EFBFBD><EFBFBD>ѡ<EFBFBD><EFBFBD><span lang=EN-US>)</span><EFBFBD><EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD>IJ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US>
|
||
* (3) </span><EFBFBD>ű<EFBFBD><EFBFBD><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><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD>ŷ<EFBFBD>ʽ<EFBFBD><EFBFBD>ɵġ<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>ƽű<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD>IJ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͽ<EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD><EFBFBD>С<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ó<EFBFBD><EFBFBD><EFBFBD><EFBFBD>룬<EFBFBD><EFBFBD>ת<EFBFBD><EFBFBD><span
|
||
lang=EN-US>exec_error1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>⣬<EFBFBD><EFBFBD><EFBFBD>ڱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ṩ<EFBFBD>Ľű<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // filename</span><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>ռ䣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>︳<EFBFBD><EFBFBD><span
|
||
lang=EN-US>copy_strings()</span><EFBFBD>Ľű<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں˿ռ䣬<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><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Դ<EFBFBD><EFBFBD>־<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ó<EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ں˿ռ䣬<EFBFBD><EFBFBD><span
|
||
lang=EN-US>copy_strings()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD>ó<EFBFBD><span lang=EN-US>2</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĵ<EFBFBD><span
|
||
lang=EN-US>301</span><EFBFBD><EFBFBD><span lang=EN-US>304</span><EFBFBD>С<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>298</span></u><span
|
||
lang=EN-US>
|
||
p = <u><span style='color:blue'>copy_strings</span></u>(1, &filename, page,
|
||
p, 1);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>299</span></u><span
|
||
lang=EN-US> argc++;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>300</span></u><span
|
||
lang=EN-US>
|
||
if (i_arg) {
|
||
// </span><EFBFBD><EFBFBD><EFBFBD>ƽ<EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD>Ķ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>301</span></u><span
|
||
lang=EN-US>
|
||
p = <u><span style='color:blue'>copy_strings</span></u>(1, &i_arg, page, p,
|
||
2);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>302</span></u><span
|
||
lang=EN-US>
|
||
argc++;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>303</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>304</span></u><span
|
||
lang=EN-US>
|
||
p = <u><span style='color:blue'>copy_strings</span></u>(1, &i_name, page,
|
||
p, 2);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>305</span></u><span
|
||
lang=EN-US>
|
||
argc++;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>306</span></u><span
|
||
lang=EN-US>
|
||
if (!p) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>307</span></u><span
|
||
lang=EN-US>
|
||
retval = -<u><span style='color:blue'>ENOMEM</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>308</span></u><span
|
||
lang=EN-US>
|
||
goto exec_error1;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>309</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>310</span></u><span
|
||
lang=EN-US>
|
||
<b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>311</span></u><span
|
||
lang=EN-US> <b><i> *
|
||
OK, now restart the process with the interpreter's inode.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>312</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>
|
||
* OK</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>ý<EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><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><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD>ý<EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ָ<EFBFBD>룬Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ת<EFBFBD><EFBFBD><span lang=EN-US>204</span><EFBFBD><EFBFBD>ȥִ<EFBFBD>н<EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD>˻<EFBFBD>ý<EFBFBD><EFBFBD>ͳ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫʹ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>namei()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǹú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>õIJ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǵ<EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ݿռ<EFBFBD>õ<EFBFBD><EFBFBD>ģ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӶμĴ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>fs</span><EFBFBD><EFBFBD>ָ<EFBFBD>ռ<EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD>á<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>namei()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֮ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><span lang=EN-US>fs</span>ָ<EFBFBD><EFBFBD><EFBFBD>ں<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿռ䣬<EFBFBD><EFBFBD><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܴ<EFBFBD><EFBFBD>ں˿ռ<EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>namei()</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>غ<EFBFBD>ָ<EFBFBD><span lang=EN-US>fs</span><EFBFBD><EFBFBD>Ĭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>á<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭ<span
|
||
lang=EN-US>fs</span><EFBFBD>μĴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭָ<EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݶΣ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ó<EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>ں<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݶΣ<EFBFBD>Ȼ<EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㡣֮<EFBFBD><EFBFBD><EFBFBD>ٻָ<EFBFBD><span lang=EN-US>fs</span><EFBFBD><EFBFBD>ԭֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ת<EFBFBD><EFBFBD><span lang=EN-US>restart_interp</span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>204</span><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>´<EFBFBD><EFBFBD><EFBFBD><EFBFBD>µ<EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><span lang=EN-US> -- </span><EFBFBD>ű<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>Ľ<EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>313</span></u><span
|
||
lang=EN-US>
|
||
old_fs = <u><span style='color:blue'>get_fs</span></u>();</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>314</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>set_fs</span></u>(<u><span style='color:blue'>get_ds</span></u>());</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>315</span></u><span
|
||
lang=EN-US>
|
||
if (!(inode=<u><span style='color:blue'>namei</span></u>(interp))) {
|
||
<b><i>/* get executables inode */</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>316</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>set_fs</span></u>(old_fs);
|
||
/* </span>ȡ<EFBFBD>ý<EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<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>
|
||
retval = -<u><span style='color:blue'>ENOENT</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>318</span></u><span
|
||
lang=EN-US>
|
||
goto exec_error1;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>319</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>320</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>set_fs</span></u>(old_fs);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>321</span></u><span
|
||
lang=EN-US>
|
||
goto restart_interp;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>322</span></u><span
|
||
lang=EN-US> }</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><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>ͷ<EFBFBD>ṹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>ex </span><EFBFBD>С<EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷŸû<C5B8><C3BB><EFBFBD>飬<EFBFBD><E9A3AC><EFBFBD><EFBFBD>ʼ<EFBFBD><CABC></p>
|
||
|
||
<p class=a><span lang=EN-US> // ex</span><EFBFBD>е<EFBFBD>ִ<EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>жϴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>Linux 0.12</span><EFBFBD>ں<EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֧<EFBFBD><EFBFBD><span lang=EN-US>ZMAGIC</span>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ʽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>붼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<span
|
||
lang=EN-US>0 </span><EFBFBD><EFBFBD>ʼִ<EFBFBD>У<EFBFBD><EFBFBD><EFBFBD>˲<EFBFBD>֧<EFBFBD>ֺ<EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ض<EFBFBD>λ<EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>ʵ<EFBFBD><EFBFBD>̫<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>ȱ<EFBFBD><EFBFBD>ȫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<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><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD>г<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>ZMAGIC</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ߴ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ض<EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD>ֳ<EFBFBD><EFBFBD>Ȳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>(</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>+</span><EFBFBD><EFBFBD><EFBFBD>ݶ<EFBFBD><span
|
||
lang=EN-US>+</span><EFBFBD><EFBFBD><span lang=EN-US>) </span><EFBFBD><EFBFBD><EFBFBD>ȳ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>50MB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD><EFBFBD><span lang=EN-US>
|
||
(</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>+</span><EFBFBD><EFBFBD><EFBFBD>ݶ<EFBFBD><span lang=EN-US>+</span><EFBFBD><EFBFBD><EFBFBD>ű<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>+</span>ִ<EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>) </span><EFBFBD><EFBFBD><EFBFBD>ȵ<EFBFBD><EFBFBD>ܺ͡<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>323</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>324</span></u><span
|
||
lang=EN-US> if (<u><span
|
||
style='color:blue'>N_MAGIC</span></u>(ex) != <u><span style='color:blue'>ZMAGIC</span></u>
|
||
|| ex.a_trsize || ex.a_drsize ||</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>325</span></u><span
|
||
lang=EN-US>
|
||
ex.a_text+ex.a_data+ex.a_bss>0x3000000 ||</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>326</span></u><span
|
||
lang=EN-US> inode->i_size
|
||
< ex.a_text+ex.a_data+ex.a_syms+<u><span style='color:blue'>N_TXTOFF</span></u>(ex))
|
||
{</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>327</span></u><span
|
||
lang=EN-US>
|
||
retval = -<u><span style='color:blue'>ENOEXEC</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>328</span></u><span
|
||
lang=EN-US>
|
||
goto exec_error2;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>329</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>⣬<EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>д<EFBFBD><EFBFBD>뿪ʼ<EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD>ҳ<EFBFBD>棨<span lang=EN-US>1024</span><EFBFBD>ֽڣ<EFBFBD><EFBFBD>߽紦<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD>С<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>Demand paging</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ļ<EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݶ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>߽紦<EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>330</span></u><span
|
||
lang=EN-US> if (<u><span
|
||
style='color:blue'>N_TXTOFF</span></u>(ex) != <u><span style='color:blue'>BLOCK_SIZE</span></u>)
|
||
{</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>331</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>printk</span></u>(<i>"%s: N_TXTOFF !=
|
||
BLOCK_SIZE. See a.out.h."</i>, filename);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>332</span></u><span
|
||
lang=EN-US>
|
||
retval = -<u><span style='color:blue'>ENOEXEC</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>333</span></u><span
|
||
lang=EN-US>
|
||
goto exec_error2;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>334</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>sh_bang</span><EFBFBD><EFBFBD>־û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>в<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>sh_bang</span><EFBFBD><EFBFBD>־<EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>нű<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƣ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٸ<EFBFBD><EFBFBD>ơ<EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>sh_bang</span>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD>ƵĻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD>ʱָ<EFBFBD><EFBFBD><span lang=EN-US>p</span><EFBFBD><EFBFBD><EFBFBD>Ÿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>Ӷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƶ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD>λ<EFBFBD>ڳ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϸ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>p</span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĵ<EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD>ϣ<EFBFBD><span lang=EN-US>p</span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>128KB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD>ƫ<EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>p=0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ˡ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>335</span></u><span
|
||
lang=EN-US> if (!sh_bang) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>336</span></u><span
|
||
lang=EN-US>
|
||
p = <u><span style='color:blue'>copy_strings</span></u>(envc,<u><span
|
||
style='color:blue'>envp</span></u>,page,p,0);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>337</span></u><span
|
||
lang=EN-US>
|
||
p = <u><span style='color:blue'>copy_strings</span></u>(argc,<u><span
|
||
style='color:blue'>argv</span></u>,page,p,0);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>338</span></u><span
|
||
lang=EN-US>
|
||
if (!p) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>339</span></u><span
|
||
lang=EN-US>
|
||
retval = -<u><span
|
||
style='color:blue'>ENOMEM</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>340</span></u><span
|
||
lang=EN-US>
|
||
goto exec_error2;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>341</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>342</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>343</span></u><span
|
||
lang=EN-US> <b><i>/* OK, This is the point of no return */</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>344</span></u><span
|
||
lang=EN-US> <b><i>/* note that current->library stays unchanged by an exec
|
||
*/</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /* OK</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>濪ʼ<EFBFBD><EFBFBD>û<EFBFBD>з<EFBFBD><EFBFBD>صĵط<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ժ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ṩ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>в<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ã<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>Ϊִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʲôʵ<EFBFBD><EFBFBD><EFBFBD>ԵĹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ṹ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ȹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Щ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>ֱ<EFBFBD><EFBFBD>ʹ<EFBFBD>õ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD>̵ġ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ǡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD>̽<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>Ľ<EFBFBD><EFBFBD>̣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷŵ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD>õ<EFBFBD>ijЩ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ϵͳ<EFBFBD><EFBFBD>Դ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ر<EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѵ<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD>õ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD>ȡ<EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>ͷ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD>ĵ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>õľֲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>LDT</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD>κ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݶ<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>ǰ<EFBFBD>洦<EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>e_uid</span><EFBFBD><EFBFBD><span lang=EN-US>e_gid</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ý<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ṹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ص<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>Ρ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD>б<EFBFBD><EFBFBD><EFBFBD>ϵͳ<EFBFBD><EFBFBD><EFBFBD>ó<EFBFBD><EFBFBD><EFBFBD>ķ<EFBFBD><EFBFBD>ص<EFBFBD>ַ <span
|
||
lang=EN-US>eip[]</span>ָ<EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼλ<EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϵͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD>غ<EFBFBD>ͻ<EFBFBD>ȥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ˡ<EFBFBD>ע<EFBFBD>⣬<EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݻ<EFBFBD>û<EFBFBD>д<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>м<EFBFBD><EFBFBD>ص<EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>copy_strings() </span><EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // get_free_page()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>change_ldt()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD><span lang=EN-US>put_page()</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>˽<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD><EFBFBD>ĩ<EFBFBD>˴<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>⣬<EFBFBD><EFBFBD><span
|
||
lang=EN-US>create_tables()</span><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD>ջ<EFBFBD>ϴ<EFBFBD>Ų<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȱҳ<EFBFBD>쳣<EFBFBD><EFBFBD><EFBFBD>Ӷ<EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD>ʹ<EFBFBD>Ϊ<EFBFBD>û<EFBFBD>ջ<EFBFBD>ռ<EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<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>ȷŻؽ<EFBFBD><EFBFBD><EFBFBD>ԭִ<EFBFBD>г<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ý<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>executable </span><EFBFBD>ֶ<EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㡣Ȼ<EFBFBD><EFBFBD>λԭ<EFBFBD><EFBFBD><EFBFBD>̵<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>źŴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>SIG_IGN</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>븴λ<EFBFBD><EFBFBD><EFBFBD>ٸ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD>ʱ<EFBFBD>ر<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>close_on_exec</span><EFBFBD><EFBFBD>λͼ<EFBFBD><EFBFBD>־<EFBFBD><EFBFBD><EFBFBD>ر<EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD>ñ<EFBFBD>־<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>345</span></u><span
|
||
lang=EN-US> if (<u><span
|
||
style='color:blue'>current</span></u>->executable)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>346</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(<u><span style='color:blue'>current</span></u>->executable);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>347</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>current</span></u>->executable = inode;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>348</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>current</span></u>->signal = 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>349</span></u><span
|
||
lang=EN-US> for (i=0 ; i<32
|
||
; i++) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>350</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>current</span></u>-><u><span style='color:blue'>sigaction</span></u>[i].sa_mask
|
||
= 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>351</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>current</span></u>-><u><span style='color:blue'>sigaction</span></u>[i].sa_flags
|
||
= 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>352</span></u><span
|
||
lang=EN-US>
|
||
if (<u><span style='color:blue'>current</span></u>-><u><span
|
||
style='color:blue'>sigaction</span></u>[i].sa_handler != <u><span
|
||
style='color:blue'>SIG_IGN</span></u>)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>353</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>current</span></u>-><u><span style='color:blue'>sigaction</span></u>[i].sa_handler
|
||
= <u><span style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>354</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>355</span></u><span
|
||
lang=EN-US> for (i=0 ; i<<u><span
|
||
style='color:blue'>NR_OPEN</span></u> ; i++)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>356</span></u><span
|
||
lang=EN-US>
|
||
if ((<u><span style='color:blue'>current</span></u>->close_on_exec>>i)&1)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>357</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>sys_close</span></u>(i);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>358</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>current</span></u>->close_on_exec = 0;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݵ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD>ԭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD>κ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݶ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD>漰ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>ռ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>κ<EFBFBD>ҳ<EFBFBD>棬<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<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><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȱҳ<EFBFBD>쳣<EFBFBD>жϣ<EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD>ȱҳ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ұ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>С<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Э<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǵ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD>̣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ÿգ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λʹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Э<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>359</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>free_page_tables</span></u>(<u><span style='color:blue'>get_base</span></u>(<u><span
|
||
style='color:blue'>current</span></u>->ldt[1]),<u><span style='color:blue'>get_limit</span></u>(0x0f));</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>360</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>free_page_tables</span></u>(<u><span style='color:blue'>get_base</span></u>(<u><span
|
||
style='color:blue'>current</span></u>->ldt[2]),<u><span style='color:blue'>get_limit</span></u>(0x17));</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>361</span></u><span
|
||
lang=EN-US> if (<u><span
|
||
style='color:blue'>last_task_used_math</span></u> == <u><span style='color:
|
||
blue'>current</span></u>)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>362</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>last_task_used_math</span></u> = <u><span
|
||
style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>363</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>current</span></u>->used_math = 0;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>ͷ<EFBFBD>ṹ<EFBFBD>еĴ<EFBFBD><EFBFBD>볤<EFBFBD><EFBFBD><EFBFBD>ֶ<EFBFBD><span
|
||
lang=EN-US> a_text </span><EFBFBD><EFBFBD>ֵ<EFBFBD>ľֲ<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><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>128KB </span><EFBFBD>IJ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݶ<EFBFBD>ĩ<EFBFBD>ˡ<EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֮<EFBFBD><EFBFBD><span lang=EN-US>p</span><EFBFBD><EFBFBD>ʱ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ij<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݶ<EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>Ϊԭ<EFBFBD><EFBFBD><EFBFBD>ƫ<EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ<EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ת<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ϊջָ<EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>create_tables() </span><EFBFBD><EFBFBD>ջ<EFBFBD>ռ<EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ͳ<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><span lang=EN-US>main()</span><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ظ<EFBFBD>ջָ<EFBFBD>롣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>364</span></u><span
|
||
lang=EN-US> p += <u><span
|
||
style='color:blue'>change_ldt</span></u>(ex.a_text,page);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>365</span></u><span
|
||
lang=EN-US> p -= <u><span
|
||
style='color:blue'>LIBRARY_SIZE</span></u> + <u><span style='color:blue'>MAX_ARG_PAGES</span></u>*<u><span
|
||
style='color:blue'>PAGE_SIZE</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>366</span></u><span
|
||
lang=EN-US> p = (unsigned long)
|
||
<u><span style='color:blue'>create_tables</span></u>((char *)p,argc,envc);</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>Ľ<EFBFBD><EFBFBD≯<EFBFBD><EFBFBD>ֶ<EFBFBD>ֵΪ<EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ṹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>β<EFBFBD>ֶ<EFBFBD><span
|
||
lang=EN-US>end_code</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD>γ<EFBFBD><EFBFBD><EFBFBD> <span
|
||
lang=EN-US>a_text</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>β<EFBFBD>ֶ<EFBFBD> <span lang=EN-US>end_data </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD>γ<EFBFBD><EFBFBD>ȼ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ݶγ<EFBFBD><EFBFBD>ȣ<EFBFBD><span lang=EN-US>a_data
|
||
+ a_text</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̶ѽ<EFBFBD>β<EFBFBD>ֶ<EFBFBD><span lang=EN-US>brk = a_text + a_data + a_bss</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // brk</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̵<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD>ݶΣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>δ<EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݲ<EFBFBD><EFBFBD>֣<EFBFBD>ĩ<EFBFBD><EFBFBD>λ<EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں<EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD>̷<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ʱָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>俪ʼλ<EFBFBD>á<EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ý<EFBFBD><EFBFBD><EFBFBD>ջ<EFBFBD><EFBFBD>ʼ<EFBFBD>ֶ<EFBFBD>Ϊջָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>棬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ý<EFBFBD><EFBFBD>̵<EFBFBD><EFBFBD><EFBFBD>Ч</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>û<EFBFBD><span lang=EN-US>id</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD><span
|
||
lang=EN-US>id</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>367</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>current</span></u>-><u><span style='color:blue'>brk</span></u>
|
||
= ex.a_bss +</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>368</span></u><span
|
||
lang=EN-US>
|
||
(<u><span style='color:blue'>current</span></u>->end_data = ex.a_data +</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>369</span></u><span
|
||
lang=EN-US>
|
||
(<u><span style='color:blue'>current</span></u>->end_code =
|
||
ex.a_text));</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>370</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>current</span></u>->start_stack = p & 0xfffff000;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>371</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>current</span></u>->suid = <u><span style='color:blue'>current</span></u>->euid
|
||
= e_uid;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>372</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>current</span></u>->sgid = <u><span style='color:blue'>current</span></u>->egid
|
||
= e_gid;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϵͳ<EFBFBD>жϵij<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڶ<EFBFBD>ջ<EFBFBD>ϵĴ<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>滻Ϊָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD>г<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ջ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ָ<EFBFBD><EFBFBD><EFBFBD>滻Ϊ<EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>ջָ<EFBFBD>롣<EFBFBD>˺<EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Щջ<EFBFBD><EFBFBD><EFBFBD>ݲ<EFBFBD>ʹ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>CPU</span>ȥִ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˲<EFBFBD><EFBFBD>᷵<EFBFBD>ص<EFBFBD>ԭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϵͳ<EFBFBD>жϵij<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȥ<EFBFBD>ˡ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>373</span></u><span
|
||
lang=EN-US> eip[0] =
|
||
ex.a_entry; <b><i>/* eip, magic happens :-) */</i></b>
|
||
/* eip</span><EFBFBD><EFBFBD>ħ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>*/</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>374</span></u><span
|
||
lang=EN-US> eip[3] =
|
||
p; <b><i>/*
|
||
stack pointer */</i></b> /*
|
||
esp</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ջָ<EFBFBD><EFBFBD><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>375</span></u><span
|
||
lang=EN-US> return 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>376</span></u><span
|
||
lang=EN-US> exec_error2:</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>377</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>iput</span></u>(inode);
|
||
// </span><EFBFBD>Ż<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㡣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>378</span></u><span
|
||
lang=EN-US> exec_error1:</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>379</span></u><span
|
||
lang=EN-US> for (i=0 ; i<<u><span
|
||
style='color:blue'>MAX_ARG_PAGES</span></u> ; i++)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>380</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>free_page</span></u>(page[i]);
|
||
// </span><EFBFBD>ͷŴ<EFBFBD>Ų<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<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'>381</span></u><span
|
||
lang=EN-US> return(retval);
|
||
// </span><EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>롣</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> </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>
|