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annotate slides/2018/04/06/memo.txt @ 25:387ca051646f

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auto-Update generated slides by script
author Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
date Fri, 06 Apr 2018 19:35:48 +0900
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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1 物理アドレスと仮装アドレスが同じ
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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 - vector 割り込みvectorの処理
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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4 - lassbery-->固定のmemory map ==> 取ってくるAPIがある?
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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5
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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6 device driver --> device driverを見つけるAPIを探す
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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7
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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8 vmm -> virtual memory manager
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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9
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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10 kmain{
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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11 binit --> buffer cache
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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12 fileinit --> filetable
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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13
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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14 sti() --> set intrast
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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15 }
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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16
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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17 ?? -> user空間なのでkernelからはわからない(memory空間が異なる)
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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18
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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19 trapframe -> forkを読んだ際にregisterに入れる情報
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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20
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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21 fork {
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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22
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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23 np = allocproc() <- proc を 作成
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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24 processのメモリ空間の共有 -> copyuvmでpagetableをコピーして
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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25
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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26 user space側のstackを置き去りにして,今のr
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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 process ごとにtrap frameを用意している
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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29 filedup(proc->ofile[i]) <<- リファレンスカウント方式で処理をしている
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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30
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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31 java -- リファレンスカウントではない, objective-cはautomatic refalence count
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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32
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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33 idup(proc->cwd); <- pwdをコピーする
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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34 sagestrcpy() <- 何故かコピーをしている
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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35
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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36 pidを返して終わり
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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37 }
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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38
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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39
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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40 errorした場合は別のcontinuationに行くtaskを書くことが出来る
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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41
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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42 CodeSegmentの中ではfor文を使っても良い、単純な処理ならinterfaceに置き換えられる
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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43
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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44 switchuvm{
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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45
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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46 OSの割り込み処理を許可する--> interactive mode
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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47
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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48 multiprocessor => どのCPUを割り込ませるのかはスケジューリングの問題 ( Programable Intractice Contorler )
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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49 割り込まれるCPUはわからない ( software interact を除く)
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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50
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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51 OSのメモリモデルがやっかい
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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52
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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53 interruptsはmultiprocessorで分散される
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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54 そのCPUでは割り込みが起こらないものをcliで制御している。
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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55 -> 1
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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56
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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57 push
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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58 誰かが禁止しているときにpopすると割り込み禁止が解除される為、禁止をする
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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59
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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60 割り込みが入る-> kernel から kernelに移行するのでuserには影響しないのでは…?
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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61 割り込みルーチンがuser pageに触らないはず…?
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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62
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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63 割り込み?例えばキー入力
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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64 uartの入力を待っているuser processがいたら?
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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65 そのprocessのstatusを切り替える必要がある?
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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66
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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67 割り込まれても割り込みルーチンがuser spaceに干渉しなければ良さそう
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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68 }
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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69
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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70 exec {
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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71 kernel移動
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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72 trapret --> assemblerで書かれている。ここでuse spaceに移動している?
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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73
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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74 ls --> ssemblerで書かれていている
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Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
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75 }