{"id":1268,"date":"2012-02-16T04:08:58","date_gmt":"2012-02-15T10:08:58","guid":{"rendered":"http:\/\/peta.okechan.net\/blog\/?p=1268"},"modified":"2012-03-14T11:22:07","modified_gmt":"2012-03-14T02:22:07","slug":"xv6%e3%82%bd%e3%83%bc%e3%82%b9%e3%82%b3%e3%83%bc%e3%83%89%e3%83%aa%e3%83%bc%e3%83%87%e3%82%a3%e3%83%b3%e3%82%b0-%e3%81%9d%e3%81%ae11","status":"publish","type":"post","link":"https:\/\/peta.okechan.net\/blog\/archives\/1268","title":{"rendered":"[xv6 #11] Chapter 1 – The first process – Address space details"},"content":{"rendered":"

\u30c6\u30ad\u30b9\u30c8\u306e20\u301c21\u30da\u30fc\u30b8<\/p>\n

\u672c\u6587<\/h3>\n

entry\u30eb\u30fc\u30c1\u30f3\u306b\u3088\u3063\u3066\u4f5c\u3089\u308c\u305f\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306f\u3001\u30ab\u30fc\u30cd\u30eb\u306eC\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3057\u306f\u3058\u3081\u308b\u306e\u306b\u5341\u5206\u3067\u3042\u308b\u3002
\n\u3057\u304b\u3057\u306a\u304c\u3089\u3001main\u95a2\u6570\u306f\u305f\u3060\u3061\u306bkvmalloc\uff08vm.c\uff09\u3092\u547c\u3093\u3067\u65b0\u3057\u3044\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u3078\u3068\u5909\u66f4\u3059\u308b\u3002
\n\u306a\u305c\u306a\u3089\u30ab\u30fc\u30cd\u30eb\u306f\u3001\u30d7\u30ed\u30bb\u30b9\u306e\u30a2\u30c9\u30ec\u30b9\u7a7a\u9593\u3092\u8868\u73fe\u3059\u308b\u305f\u3081\u3001\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306b\u3064\u3044\u3066\u3082\u3063\u3068\u8907\u96d1\u306a\u30d7\u30e9\u30f3\u3092\u6301\u3063\u3066\u308b\u304b\u3089\u3067\u3042\u308b\u3002
\n\uff08\u3053\u308c\u3060\u3051\u898b\u3066\u3082\u8a73\u7d30\u306f\u5206\u304b\u308a\u307e\u305b\u3093\u304c\u4e00\u5fdcvm.c\u306ekvmalloc\u95a2\u6570\u306e\u90e8\u5206\u3060\u3051\u8f09\u305b\u3068\u304d\u307e\u3059\u3002\uff09<\/p>\n

\/\/ Allocate one page table for the machine for the kernel address\n\/\/ space for scheduler processes.\nvoid\nkvmalloc(void)\n{\n  kpgdir = setupkvm();\n  switchkvm();\n}<\/pre>\n
\u3069\u306e\u30d7\u30ed\u30bb\u30b9\u3082\u5206\u96e2\u3055\u308c\u305f\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u3092\u6301\u3064\u3002
\nxv6\u304c\u5b9f\u884c\u4e2d\u306e\u30d7\u30ed\u30bb\u30b9\u3092\u5207\u308a\u66ff\u3048\u305f\u3068\u304d\u306b\u3001\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u3082\u5207\u308a\u66ff\u3048\u308b\u3088\u3046xv6\u304b\u3089\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306b\u4f1d\u3048\u3089\u308c\u308b\u3002
\n\u56f31-2\u3067\u793a\u3055\u308c\u308b\u3088\u3046\u306b\u3001\u30d7\u30ed\u30bb\u30b9\u306e\u30e6\u30fc\u30b6\u30e1\u30e2\u30ea\u306f\u4eee\u60f3\u30a2\u30c9\u30ec\u30b90\u304b\u3089\u59cb\u307e\u308a\u3001KERNBASE\u307e\u3067\u62e1\u5f35\u3067\u304d\u308b\u3002
\n\u3064\u307e\u308a\u3072\u3068\u3064\u306e\u30d7\u30ed\u30bb\u30b9\u3067\u6700\u59272GB\u307e\u3067\u306e\u30e1\u30e2\u30ea\u3092\u53c2\u7167\u3067\u304d\u308b\u3002
\n\u30d7\u30ed\u30bb\u30b9\u304b\u3089xv6\u3078\u30e1\u30e2\u30ea\u8ffd\u52a0\u306e\u8981\u6c42\u304c\u3042\u3063\u305f\u3068\u304d\u3001xv6\u306f\u307e\u305a\u3001\u7a7a\u3044\u3066\u3044\u308b\u7269\u7406\u30da\u30fc\u30b8\u3092\u63a2\u3057\u3001\u305d\u306e\u7a7a\u3044\u3066\u3044\u308b\u65b0\u3057\u3044\u7269\u7406\u30da\u30fc\u30b8\u3092\u6307\u3057\u793a\u3059PTE\u7fa4\u3092\u305d\u306e\u30d7\u30ed\u30bb\u30b9\u306e\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306b\u8ffd\u52a0\u3059\u308b\u3002
\n\uff08\u8981\u6c42\u3055\u308c\u305f\u30e1\u30e2\u30ea\u306e\u30b5\u30a4\u30ba\u306b\u3088\u3063\u3066\u3001PTE\u304c\u4e00\u3064\u3067\u6e08\u3080\u3068\u306f\u9650\u3089\u306a\u3044\uff09
\nxv6\u306f\u3001\u305d\u306ePTE\u7fa4\u306bPTE_U\u3001PTE_W\u3001PTE_P\uff08\u30e6\u30fc\u30b6\u7528\u3001\u66f8\u304d\u8fbc\u307f\u53ef\u80fd\u3001\u6709\u52b9\uff09\u30d5\u30e9\u30b0\u3092\u30bb\u30c3\u30c8\u3059\u308b\u3002
\n\u307b\u3068\u3093\u3069\u306e\u30d7\u30ed\u30bb\u30b9\u306f\u3001\u30e6\u30fc\u30b6\u30a2\u30c9\u30ec\u30b9\u7a7a\u9593\u5168\u4f53\u306f\u4f7f\u308f\u306a\u3044\u3002
\nxv6\u306f\u3001\u4f7f\u3063\u3066\u306a\u3044PTE\u7fa4\u306b\u5bfe\u3057\u3066\u306fPTE_P\u30d5\u30e9\u30b0\u3092\u30af\u30ea\u30a2\u3057\u305f\u307e\u307e\u306b\u3059\u308b\u3002
\n\u4ed6\u306e\u30d7\u30ed\u30bb\u30b9\u306e\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306f\u3001\u307b\u304b\u306e\u30e6\u30fc\u30b6\u30a2\u30c9\u30ec\u30b9\u3092\u7269\u7406\u30e1\u30e2\u30ea\u4e0a\u306e\u4ed6\u306e\u30da\u30fc\u30b8\u306b\u5909\u63db\u3059\u308b\u3002
\n\u305d\u308c\u306f\u3001\u5168\u3066\u306e\u30d7\u30ed\u30bb\u30b9\u304c\u500b\u5225\u306e\u30e6\u30fc\u30b6\u30e1\u30e2\u30ea\u3092\u6301\u3066\u308b\u3088\u3046\u306b\u3059\u308b\u305f\u3081\u3067\u3042\u308b\u3002<\/p>\n
\u56f31-2 \u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u7a7a\u9593\u3068\u7269\u7406\u30a2\u30c9\u30ec\u30b9\u7a7a\u9593\u306e\u30ec\u30a4\u30a2\u30a6\u30c8
\n\"\"<\/a><\/p>\n
xv6\u306f\u3001\u3069\u306e\u30d7\u30ed\u30bb\u30b9\u306e\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u3067\u3082\u30ab\u30fc\u30cd\u30eb\u304c\u52d5\u4f5c\u3059\u308b\u305f\u3081\u306b\u5fc5\u8981\u3068\u3055\u308c\u308b\u5168\u3066\u306e\u5bfe\u5fdc\u4ed8\u3051\u3092\u542b\u3080\u3002
\n\u305d\u306e\u3088\u3046\u306a\u5bfe\u5fdc\u4ed8\u3051\u306f\u5168\u3066\u3001KERNBASE\u3088\u308a\u4e0a\u306b\u73fe\u308c\u308b\u3002
\n\u305d\u308c\u306f\u3001\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9KERNBASE:KERNBASE+PHYSTOP\u3092\u7269\u7406\u30a2\u30c9\u30ec\u30b90:PHYSTOP\u306b\u5bfe\u5fdc\u4ed8\u3051\u308b\u3002
\n\u3053\u3046\u306a\u3063\u3066\u308b\u7406\u7531\u306e\u4e00\u3064\u306f\u3001\u30ab\u30fc\u30cd\u30eb\u304c\u305d\u308c\u81ea\u8eab\u306e\u547d\u4ee4\u3068\u30c7\u30fc\u30bf\u3092\u4f7f\u3048\u308b\u3088\u3046\u306b\u3059\u308b\u305f\u3081\u3067\u3042\u308b\u3002
\n\u4ed6\u306e\u7406\u7531\u306f\u3001\u3057\u3070\u3057\u3070\uff08\u4f8b\u3048\u3070\u3001\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u7528\u306e\u30da\u30fc\u30b8\u3092\u4f5c\u6210\u3059\u308b\u3068\u304d\u306b\uff09\u3001\u30ab\u30fc\u30cd\u30eb\u306f\u4e0e\u3048\u3089\u308c\u305f\u7269\u7406\u30e1\u30e2\u30ea\u4e0a\u306e\u30da\u30fc\u30b8\u306b\u5bfe\u3057\u3066\u66f8\u304d\u8fbc\u3081\u308b\u5fc5\u8981\u304c\u3042\u308b\u304b\u3089\u3067\u3042\u308b\u3002
\n\u5168\u3066\u306e\u30d7\u30ed\u30bb\u30b9\u304c\u3001\u3053\u3046\u3044\u3046\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u306b\u73fe\u308c\u308b\u4e88\u6e2c\u53ef\u80fd\u306a\u7269\u7406\u30da\u30fc\u30b8\u3092\u6301\u3064\u3053\u3068\u306f\u3001\u3053\u306e\u3088\u3046\u306a\u4fbf\u5229\u3055\u3092\u5275\u308a\u3060\u3059\u3002
\n\u3053\u306e\u6c7a\u307e\u308a\u3054\u3068\u306e\u6b20\u70b9\u306f\u3001xv6\u304c2GB\u4ee5\u4e0a\u306e\u7269\u7406\u30e1\u30e2\u30ea\u3092\u30d7\u30ed\u30bb\u30b9\u306b\u5bfe\u3057\u3066\u4f7f\u3048\u308b\u3088\u3046\u306b\u3067\u304d\u306a\u3044\u70b9\u3067\u3042\u308b\u3002
\n\u30e1\u30e2\u30ea\u30de\u30c3\u30d7\u30c9I\/O\u3092\u4f7f\u3046\u3044\u304f\u3064\u304b\u306e\u6a5f\u5668\u306f\u30010xFE000000\u304b\u3089\u59cb\u307e\u308b\u7269\u7406\u30a2\u30c9\u30ec\u30b9\u3092\u4f7f\u3046\u3002
\n\u306a\u306e\u3067xv6\u306e\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306f\u305d\u3046\u3044\u3046\u6a5f\u5668\u306e\u305f\u3081\u306e\u76f4\u63a5\u306e\u5bfe\u5fdc\u4ed8\u3051\uff08direct mapping\uff09\u3092\u6301\u3064\u3002
\nxv6\u306fPTE_U\u30d5\u30e9\u30b0\u3092KERNBASE\u3088\u308a\u4e0a\u3092\u6307\u3059PTE\u7fa4\u306b\u306f\u30bb\u30c3\u30c8\u3057\u306a\u3044\u3002
\n\u305d\u308c\u306f\u3001\u305d\u306e\u9818\u57df\u3092\u30ab\u30fc\u30cd\u30eb\u304b\u3089\u306e\u307f\u4f7f\u3048\u308b\u3088\u3046\u306b\u3059\u308b\u305f\u3081\u3067\u3042\u308b\u3002<\/p>\n
\u30d7\u30ed\u30bb\u30b9\u3054\u3068\u306b\u3001\u30e6\u30fc\u30b6\u30e1\u30e2\u30ea\u3068\u30ab\u30fc\u30cd\u30eb\u5168\u4f53\u306e\u4e21\u65b9\u3092\u5bfe\u5fdc\u4ed8\u3051\u308b\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u3092\u6301\u3064\u4e8b\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u30b3\u30fc\u30eb\u3084\u5272\u308a\u8fbc\u307f\u4e2d\u306b\u30e6\u30fc\u30b6\u30b3\u30fc\u30c9\u304b\u3089\u30ab\u30fc\u30cd\u30eb\u30b3\u30fc\u30c9\u3078\u5207\u308a\u66ff\u3048\u308b\u3068\u304d\u306b\u4fbf\u5229\u3067\u3042\u308b\u3002
\n\u305d\u306e\u3088\u3046\u306a\u5207\u66ff\u306f\u3001\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306e\u5207\u66ff\u306f\u5fc5\u8981\u3068\u3057\u306a\u3044\u3002
\n\u5927\u90e8\u5206\u306f\u30ab\u30fc\u30cd\u30eb\u306f\u81ea\u8eab\u306e\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u3092\u6301\u305f\u306a\u3044\u3002
\n\u305d\u308c\u306f\u5927\u62b5\u3001\u3069\u3053\u304b\u306e\u30d7\u30ed\u30bb\u30b9\u306e\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u3092\u501f\u308a\u3066\u3044\u308b\u3002<\/p>\n
\u304a\u3055\u3089\u3044\u3002
\nxv6\u306f\u3001\u3069\u306e\u30d7\u30ed\u30bb\u30b9\u3082\u81ea\u5206\u81ea\u8eab\u306e\u30e1\u30e2\u30ea\u3060\u3051\u3092\u4f7f\u3048\u308b\u3088\u3046\u306b\u3059\u308b\u4e8b\u3068\u3001\u30d7\u30ed\u30bb\u30b9\u306b\u81ea\u8eab\u306e\u30e1\u30e2\u30ea\u3092\u9023\u7d9a\u3057\u305f\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u3068\u3057\u3066\u898b\u305b\u308b\u3088\u3046\u306b\u3059\u308b\u4e8b\u3092\u78ba\u5b9f\u306b\u3059\u308b\u3002
\n\u307e\u305a\u3001\u30d7\u30ed\u30bb\u30b9\u81ea\u8eab\u306e\u30e1\u30e2\u30ea\u3092\u53c2\u7167\u3059\u308b\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u306ePTE\u7fa4\u306b\u5bfe\u3057\u3066\u306e\u307fPTE_U\u30d5\u30e9\u30b0\u3092\u8a2d\u5b9a\u3059\u308b\u4e8b\u306b\u3088\u3063\u3066\u3001xv6\u306f\u305d\u308c\u3092\u5b9f\u88c5\u3057\u3066\u3044\u308b\u3002
\n\u6b21\u306b\u3001\u9023\u7d9a\u3057\u305f\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u3092\u30d7\u30ed\u30bb\u30b9\u306b\u5272\u308a\u5f53\u3066\u3089\u308c\u305f\u3069\u3093\u306a\u7269\u7406\u30da\u30fc\u30b8\u306b\u3067\u3082\u5909\u63db\u3059\u308b\u305f\u3081\u306b\u3001\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306e\u80fd\u529b\u3092\u4f7f\u3046\u4e8b\u306b\u3088\u3063\u3066\u3001\u305d\u308c\u3092\u5b9f\u88c5\u3057\u3066\u3044\u308b\u3002<\/p>\n
\u611f\u60f3<\/h3>\n
\u30a2\u30c9\u30ec\u30b9\u7a7a\u9593\u306b\u3064\u3044\u3066\u3067\u3059\u3002
\n\u56f31-2\u304c\u5168\u3066\u306a\u3093\u3067\u3059\u304c\u3001\u4f55\u6545\u305d\u3046\u306a\u306e\u304b\u306a\u3069\u304c\u8272\u3005\u8aac\u660e\u3055\u308c\u3066\u307e\u3059\u3002<\/p>\n
\u30ab\u30fc\u30cd\u30eb\u306f\u3001\u901a\u5e38\u306e\u30d7\u30ed\u30bb\u30b9\u3068\u540c\u3058\u3088\u3046\u306b\u8003\u3048\u305f\u5834\u5408\u306b\u5fc5\u8981\u3068\u306a\u308b\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306e\u5927\u90e8\u5206\u3092\u6301\u305f\u306a\u3044\u3089\u3057\u3044\u3067\u3059\u304c\u3001\u5168\u3066\u306e\u30d7\u30ed\u30bb\u30b9\u306eKERNBASE\u4ee5\u964d\u306b\u56fa\u5b9a\u7684\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u3001\u81ea\u8eab\u306e\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u3092\u6301\u305f\u306a\u3044\u307e\u307e\u52d5\u4f5c\u3059\u308b\u3053\u3068\u304c\u51fa\u6765\u308b\u3068\u3002<\/p>\n
2GB\u3063\u3066\u3068\u3053\u308d\u306f\u591a\u5206KERNBASE\u304c0x80000000\u3060\u304b\u3089\u3067\u3059\u306d\u3002<\/p>\n
\u7ffb\u8a33\u3063\u3066\u96e3\u3057\u3044\u3002
\n\u3044\u3084\u305d\u3082\u305d\u3082\u7ffb\u8a33\u3068\u3044\u3046\u3088\u308a\u306f\u3001\u81ea\u5206\u3067\u8aad\u3093\u3067\u308b\u3068\u304d\u306e\u30e1\u30e2\u3092\u305d\u306e\u307e\u307e\u516c\u958b\u3057\u3066\u308b\u611f\u3058\u306b\u8fd1\u3044\u3093\u3067\u3059\u304c\u3001\u5185\u5bb9\u306f\u5206\u304b\u3063\u3066\u3082\u65e5\u672c\u8a9e\u3067\u3069\u3046\u73fe\u3057\u3066\u3044\u3044\u306e\u304b\u3057\u3063\u304f\u308a\u6765\u306a\u3044\u4e8b\u304c\u591a\u3044\u3067\u3059\u3002
\n\u601d\u3044\u3063\u304d\u308a\u8a00\u3044\u63db\u3048\u308c\u3070\u81ea\u7136\u306a\u65e5\u672c\u8a9e\u306b\u51fa\u6765\u308b\u3093\u3067\u3057\u3087\u3046\u3051\u3069\u3001\u7406\u89e3\u3082\u4e2d\u9014\u534a\u7aef\u306a\u306e\u3067\u4e0b\u624b\u306b\u8a00\u3044\u63db\u3048\u308b\u3088\u308a\u306f\u539f\u6587\u306e\u96f0\u56f2\u6c17\u3092\u6b8b\u3059\u3088\u3046\u306b\u76f4\u8a33\u98a8\u5473\u306b\u3057\u305f\u307b\u3046\u304c\u3044\u3044\u306e\u304b\u306a\u306a\u3093\u3066\u601d\u3044\u306a\u304c\u3089\u3084\u3063\u3066\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u30c6\u30ad\u30b9\u30c8\u306e20\u301c21\u30da\u30fc\u30b8<\/p>\n
\u672c\u6587<\/h3>\n
entry\u30eb\u30fc\u30c1\u30f3\u306b\u3088\u3063\u3066\u4f5c\u3089\u308c\u305f\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306f\u3001\u30ab\u30fc\u30cd\u30eb\u306eC\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3057\u306f\u3058\u3081\u308b\u306e\u306b\u5341\u5206\u3067\u3042\u308b\u3002
\n\u3057\u304b\u3057\u306a\u304c\u3089\u3001main\u95a2\u6570\u306f\u305f\u3060\u3061\u306bkvmalloc\uff08vm.c\uff09\u3092\u547c\u3093\u3067\u65b0\u3057\u3044\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u3078\u3068\u5909\u66f4\u3059\u308b\u3002
\n\u306a\u305c\u306a\u3089\u30ab\u30fc\u30cd\u30eb\u306f\u3001\u30d7\u30ed\u30bb\u30b9\u306e\u30a2\u30c9\u30ec\u30b9\u7a7a\u9593\u3092\u8868\u73fe\u3059\u308b\u305f\u3081\u3001\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306b\u3064\u3044\u3066\u3082\u3063\u3068\u8907\u96d1\u306a\u30d7\u30e9\u30f3\u3092\u6301\u3063\u3066\u308b\u304b\u3089\u3067\u3042\u308b\u3002
\n\uff08\u3053\u308c\u3060\u3051\u898b\u3066\u3082\u8a73\u7d30\u306f\u5206\u304b\u308a\u307e\u305b\u3093\u304c\u4e00\u5fdcvm.c\u306ekvmalloc\u95a2\u6570\u306e\u90e8\u5206\u3060\u3051\u8f09\u305b\u3068\u304d\u307e\u3059\u3002\uff09<\/p>\n
\/\/ Allocate one page table for the machine for the kernel address\n\/\/ space for scheduler processes.\nvoid\nkvmalloc(void)\n{\n  kpgdir = setupkvm();\n  switchkvm();\n}<\/pre>\n
\u3069\u306e\u30d7\u30ed\u30bb\u30b9\u3082\u5206\u96e2\u3055\u308c\u305f\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u3092\u6301\u3064\u3002
\nxv6\u304c\u5b9f\u884c\u4e2d\u306e\u30d7\u30ed\u30bb\u30b9\u3092\u5207\u308a\u66ff\u3048\u305f\u3068\u304d\u306b\u3001\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u3082\u5207\u308a\u66ff\u3048\u308b\u3088\u3046xv6\u304b\u3089\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306b\u4f1d\u3048\u3089\u308c\u308b\u3002
\n\u56f31-2\u3067\u793a\u3055\u308c\u308b\u3088\u3046\u306b\u3001\u30d7\u30ed\u30bb\u30b9\u306e\u30e6\u30fc\u30b6\u30e1\u30e2\u30ea\u306f\u4eee\u60f3\u30a2\u30c9\u30ec\u30b90\u304b\u3089\u59cb\u307e\u308a\u3001KERNBASE\u307e\u3067\u62e1\u5f35\u3067\u304d\u308b\u3002
\n\u3064\u307e\u308a\u3072\u3068\u3064\u306e\u30d7\u30ed\u30bb\u30b9\u3067\u6700\u59272GB\u307e\u3067\u306e\u30e1\u30e2\u30ea\u3092\u53c2\u7167\u3067\u304d\u308b\u3002
\n\u30d7\u30ed\u30bb\u30b9\u304b\u3089xv6\u3078\u30e1\u30e2\u30ea\u8ffd\u52a0\u306e\u8981\u6c42\u304c\u3042\u3063\u305f\u3068\u304d\u3001xv6\u306f\u307e\u305a\u3001\u7a7a\u3044\u3066\u3044\u308b\u7269\u7406\u30da\u30fc\u30b8\u3092\u63a2\u3057\u3001\u305d\u306e\u7a7a\u3044\u3066\u3044\u308b\u65b0\u3057\u3044\u7269\u7406\u30da\u30fc\u30b8\u3092\u6307\u3057\u793a\u3059PTE\u7fa4\u3092\u305d\u306e\u30d7\u30ed\u30bb\u30b9\u306e\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306b\u8ffd\u52a0\u3059\u308b\u3002
\n\uff08\u8981\u6c42\u3055\u308c\u305f\u30e1\u30e2\u30ea\u306e\u30b5\u30a4\u30ba\u306b\u3088\u3063\u3066\u3001PTE\u304c\u4e00\u3064\u3067\u6e08\u3080\u3068\u306f\u9650\u3089\u306a\u3044\uff09
\nxv6\u306f\u3001\u305d\u306ePTE\u7fa4\u306bPTE_U\u3001PTE_W\u3001PTE_P\uff08\u30e6\u30fc\u30b6\u7528\u3001\u66f8\u304d\u8fbc\u307f\u53ef\u80fd\u3001\u6709\u52b9\uff09\u30d5\u30e9\u30b0\u3092\u30bb\u30c3\u30c8\u3059\u308b\u3002
\n\u307b\u3068\u3093\u3069\u306e\u30d7\u30ed\u30bb\u30b9\u306f\u3001\u30e6\u30fc\u30b6\u30a2\u30c9\u30ec\u30b9\u7a7a\u9593\u5168\u4f53\u306f\u4f7f\u308f\u306a\u3044\u3002
\nxv6\u306f\u3001\u4f7f\u3063\u3066\u306a\u3044PTE\u7fa4\u306b\u5bfe\u3057\u3066\u306fPTE_P\u30d5\u30e9\u30b0\u3092\u30af\u30ea\u30a2\u3057\u305f\u307e\u307e\u306b\u3059\u308b\u3002
\n\u4ed6\u306e\u30d7\u30ed\u30bb\u30b9\u306e\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306f\u3001\u307b\u304b\u306e\u30e6\u30fc\u30b6\u30a2\u30c9\u30ec\u30b9\u3092\u7269\u7406\u30e1\u30e2\u30ea\u4e0a\u306e\u4ed6\u306e\u30da\u30fc\u30b8\u306b\u5909\u63db\u3059\u308b\u3002
\n\u305d\u308c\u306f\u3001\u5168\u3066\u306e\u30d7\u30ed\u30bb\u30b9\u304c\u500b\u5225\u306e\u30e6\u30fc\u30b6\u30e1\u30e2\u30ea\u3092\u6301\u3066\u308b\u3088\u3046\u306b\u3059\u308b\u305f\u3081\u3067\u3042\u308b\u3002<\/p>\n
\u56f31-2 \u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u7a7a\u9593\u3068\u7269\u7406\u30a2\u30c9\u30ec\u30b9\u7a7a\u9593\u306e\u30ec\u30a4\u30a2\u30a6\u30c8
\n\"\"<\/a><\/p>\n
xv6\u306f\u3001\u3069\u306e\u30d7\u30ed\u30bb\u30b9\u306e\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u3067\u3082\u30ab\u30fc\u30cd\u30eb\u304c\u52d5\u4f5c\u3059\u308b\u305f\u3081\u306b\u5fc5\u8981\u3068\u3055\u308c\u308b\u5168\u3066\u306e\u5bfe\u5fdc\u4ed8\u3051\u3092\u542b\u3080\u3002
\n\u305d\u306e\u3088\u3046\u306a\u5bfe\u5fdc\u4ed8\u3051\u306f\u5168\u3066\u3001KERNBASE\u3088\u308a\u4e0a\u306b\u73fe\u308c\u308b\u3002
\n\u305d\u308c\u306f\u3001\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9KERNBASE:KERNBASE+PHYSTOP\u3092\u7269\u7406\u30a2\u30c9\u30ec\u30b90:PHYSTOP\u306b\u5bfe\u5fdc\u4ed8\u3051\u308b\u3002
\n\u3053\u3046\u306a\u3063\u3066\u308b\u7406\u7531\u306e\u4e00\u3064\u306f\u3001\u30ab\u30fc\u30cd\u30eb\u304c\u305d\u308c\u81ea\u8eab\u306e\u547d\u4ee4\u3068\u30c7\u30fc\u30bf\u3092\u4f7f\u3048\u308b\u3088\u3046\u306b\u3059\u308b\u305f\u3081\u3067\u3042\u308b\u3002
\n\u4ed6\u306e\u7406\u7531\u306f\u3001\u3057\u3070\u3057\u3070\uff08\u4f8b\u3048\u3070\u3001\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u7528\u306e\u30da\u30fc\u30b8\u3092\u4f5c\u6210\u3059\u308b\u3068\u304d\u306b\uff09\u3001\u30ab\u30fc\u30cd\u30eb\u306f\u4e0e\u3048\u3089\u308c\u305f\u7269\u7406\u30e1\u30e2\u30ea\u4e0a\u306e\u30da\u30fc\u30b8\u306b\u5bfe\u3057\u3066\u66f8\u304d\u8fbc\u3081\u308b\u5fc5\u8981\u304c\u3042\u308b\u304b\u3089\u3067\u3042\u308b\u3002
\n\u5168\u3066\u306e\u30d7\u30ed\u30bb\u30b9\u304c\u3001\u3053\u3046\u3044\u3046\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u306b\u73fe\u308c\u308b\u4e88\u6e2c\u53ef\u80fd\u306a\u7269\u7406\u30da\u30fc\u30b8\u3092\u6301\u3064\u3053\u3068\u306f\u3001\u3053\u306e\u3088\u3046\u306a\u4fbf\u5229\u3055\u3092\u5275\u308a\u3060\u3059\u3002
\n\u3053\u306e\u6c7a\u307e\u308a\u3054\u3068\u306e\u6b20\u70b9\u306f\u3001xv6\u304c2GB\u4ee5\u4e0a\u306e\u7269\u7406\u30e1\u30e2\u30ea\u3092\u30d7\u30ed\u30bb\u30b9\u306b\u5bfe\u3057\u3066\u4f7f\u3048\u308b\u3088\u3046\u306b\u3067\u304d\u306a\u3044\u70b9\u3067\u3042\u308b\u3002
\n\u30e1\u30e2\u30ea\u30de\u30c3\u30d7\u30c9I\/O\u3092\u4f7f\u3046\u3044\u304f\u3064\u304b\u306e\u6a5f\u5668\u306f\u30010xFE000000\u304b\u3089\u59cb\u307e\u308b\u7269\u7406\u30a2\u30c9\u30ec\u30b9\u3092\u4f7f\u3046\u3002
\n\u306a\u306e\u3067xv6\u306e\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306f\u305d\u3046\u3044\u3046\u6a5f\u5668\u306e\u305f\u3081\u306e\u76f4\u63a5\u306e\u5bfe\u5fdc\u4ed8\u3051\uff08direct mapping\uff09\u3092\u6301\u3064\u3002
\nxv6\u306fPTE_U\u30d5\u30e9\u30b0\u3092KERNBASE\u3088\u308a\u4e0a\u3092\u6307\u3059PTE\u7fa4\u306b\u306f\u30bb\u30c3\u30c8\u3057\u306a\u3044\u3002
\n\u305d\u308c\u306f\u3001\u305d\u306e\u9818\u57df\u3092\u30ab\u30fc\u30cd\u30eb\u304b\u3089\u306e\u307f\u4f7f\u3048\u308b\u3088\u3046\u306b\u3059\u308b\u305f\u3081\u3067\u3042\u308b\u3002<\/p>\n
\u30d7\u30ed\u30bb\u30b9\u3054\u3068\u306b\u3001\u30e6\u30fc\u30b6\u30e1\u30e2\u30ea\u3068\u30ab\u30fc\u30cd\u30eb\u5168\u4f53\u306e\u4e21\u65b9\u3092\u5bfe\u5fdc\u4ed8\u3051\u308b\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u3092\u6301\u3064\u4e8b\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u30b3\u30fc\u30eb\u3084\u5272\u308a\u8fbc\u307f\u4e2d\u306b\u30e6\u30fc\u30b6\u30b3\u30fc\u30c9\u304b\u3089\u30ab\u30fc\u30cd\u30eb\u30b3\u30fc\u30c9\u3078\u5207\u308a\u66ff\u3048\u308b\u3068\u304d\u306b\u4fbf\u5229\u3067\u3042\u308b\u3002
\n\u305d\u306e\u3088\u3046\u306a\u5207\u66ff\u306f\u3001\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306e\u5207\u66ff\u306f\u5fc5\u8981\u3068\u3057\u306a\u3044\u3002
\n\u5927\u90e8\u5206\u306f\u30ab\u30fc\u30cd\u30eb\u306f\u81ea\u8eab\u306e\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u3092\u6301\u305f\u306a\u3044\u3002
\n\u305d\u308c\u306f\u5927\u62b5\u3001\u3069\u3053\u304b\u306e\u30d7\u30ed\u30bb\u30b9\u306e\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u3092\u501f\u308a\u3066\u3044\u308b\u3002<\/p>\n
\u304a\u3055\u3089\u3044\u3002
\nxv6\u306f\u3001\u3069\u306e\u30d7\u30ed\u30bb\u30b9\u3082\u81ea\u5206\u81ea\u8eab\u306e\u30e1\u30e2\u30ea\u3060\u3051\u3092\u4f7f\u3048\u308b\u3088\u3046\u306b\u3059\u308b\u4e8b\u3068\u3001\u30d7\u30ed\u30bb\u30b9\u306b\u81ea\u8eab\u306e\u30e1\u30e2\u30ea\u3092\u9023\u7d9a\u3057\u305f\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u3068\u3057\u3066\u898b\u305b\u308b\u3088\u3046\u306b\u3059\u308b\u4e8b\u3092\u78ba\u5b9f\u306b\u3059\u308b\u3002
\n\u307e\u305a\u3001\u30d7\u30ed\u30bb\u30b9\u81ea\u8eab\u306e\u30e1\u30e2\u30ea\u3092\u53c2\u7167\u3059\u308b\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u306ePTE\u7fa4\u306b\u5bfe\u3057\u3066\u306e\u307fPTE_U\u30d5\u30e9\u30b0\u3092\u8a2d\u5b9a\u3059\u308b\u4e8b\u306b\u3088\u3063\u3066\u3001xv6\u306f\u305d\u308c\u3092\u5b9f\u88c5\u3057\u3066\u3044\u308b\u3002
\n\u6b21\u306b\u3001\u9023\u7d9a\u3057\u305f\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u3092\u30d7\u30ed\u30bb\u30b9\u306b\u5272\u308a\u5f53\u3066\u3089\u308c\u305f\u3069\u3093\u306a\u7269\u7406\u30da\u30fc\u30b8\u306b\u3067\u3082\u5909\u63db\u3059\u308b\u305f\u3081\u306b\u3001\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306e\u80fd\u529b\u3092\u4f7f\u3046\u4e8b\u306b\u3088\u3063\u3066\u3001\u305d\u308c\u3092\u5b9f\u88c5\u3057\u3066\u3044\u308b\u3002<\/p>\n
\u611f\u60f3<\/h3>\n
\u30a2\u30c9\u30ec\u30b9\u7a7a\u9593\u306b\u3064\u3044\u3066\u3067\u3059\u3002
\n\u56f31-2\u304c\u5168\u3066\u306a\u3093\u3067\u3059\u304c\u3001\u4f55\u6545\u305d\u3046\u306a\u306e\u304b\u306a\u3069\u304c\u8272\u3005\u8aac\u660e\u3055\u308c\u3066\u307e\u3059\u3002<\/p>\n
\u30ab\u30fc\u30cd\u30eb\u306f\u3001\u901a\u5e38\u306e\u30d7\u30ed\u30bb\u30b9\u3068\u540c\u3058\u3088\u3046\u306b\u8003\u3048\u305f\u5834\u5408\u306b\u5fc5\u8981\u3068\u306a\u308b\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306e\u5927\u90e8\u5206\u3092\u6301\u305f\u306a\u3044\u3089\u3057\u3044\u3067\u3059\u304c\u3001\u5168\u3066\u306e\u30d7\u30ed\u30bb\u30b9\u306eKERNBASE\u4ee5\u964d\u306b\u56fa\u5b9a\u7684\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u3001\u81ea\u8eab\u306e\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u3092\u6301\u305f\u306a\u3044\u307e\u307e\u52d5\u4f5c\u3059\u308b\u3053\u3068\u304c\u51fa\u6765\u308b\u3068\u3002<\/p>\n
2GB\u3063\u3066\u3068\u3053\u308d\u306f\u591a\u5206KERNBASE\u304c0x80000000\u3060\u304b\u3089\u3067\u3059\u306d\u3002<\/p>\n
\u7ffb\u8a33\u3063\u3066\u96e3\u3057\u3044\u3002
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