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annotate slides/2018/04/16/memo.txt @ 29:fc1dbdad3f63

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author Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
date Wed, 25 Apr 2018 16:19:47 +0900
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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1 # x86
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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2
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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3 OSの起動時
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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4 + BOOTi
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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5 - Kernel Load by ARM
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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6 - CnPUがMemoryにアクセスする時はpagingのアルゴリズムを使うのでpagingをする必要がある
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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7 - PageingTable
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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8 - initialize ( memory,Process,IO,file...)
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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9 - init process(rc.d/~)
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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10 CPU , Memory, Device(UARTなど...結局はVM上に構築される)
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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11
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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12 ls
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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13 - fork
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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14 - exec ls <- open
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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15 load
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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16 memory空間の初期化==page tableのリセット
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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17 goto user mode
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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18 user.mode
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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19 opendir
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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20 memory allocation ( systemcall )
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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21 historycal : brk();
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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22 - 複数のprocess がactive -> task scheduler
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23
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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24 - armのregisterはarm0~arm12
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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25 - 一番最初のentryはmainを誰かがよばないと行けない->assemblerレベルCRT(C runtime rootine)
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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26 - arm registerにいれられる値は大きさにより、サイズがでかいのはある場所に置いといてPCで計算して持っていく
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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27
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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28 define si
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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29 stepi
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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30 x/1i $pc
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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31 end
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32
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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33 - initialize stack pointerがされるまでサブルーチンコールは許可されない。
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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34
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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35 実際にはkernel pagetableとuser pgage tableの2種類がある