[B! kernel] hirata_yasuyukiã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

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OS Development
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hirata_yasuyuki 2007/11/11
operatingsystem

programming

development

kernel
ãƒªãƒ³ã‚¯
x86 Linux ã®ãƒ¡ãƒ¢ãƒªãƒ¢ãƒ‡ãƒ«ã€ãƒ—ãƒã‚»ã‚¹ç©ºé–“åˆ‡ã‚Šæ›¿ãˆã€ã‚«ãƒ¼ãƒãƒ«ã‚¹ã‚¿ãƒƒã‚¯ - naoyaã®ã¯ã¦ãªãƒ€ã‚¤ã‚¢ãƒªãƒ¼
ã²ã¨ã¤å‰ã®ã‚¨ãƒ³ãƒˆãƒª id:naoya:20070924:1190653790 ã§ã¯ Linux ã®ã‚³ãƒ³ãƒ†ã‚ã‚¹ãƒˆã‚¹ã‚¤ãƒƒãƒã«ãŠã‘ã‚‹ã€ä¸»ã«ãƒãƒ¼ãƒ‰ã‚¦ã‚§ã‚¢ã‚³ãƒ³ãƒ†ã‚ã‚¹ãƒˆã®é€€é¿/å¾©å¸°ã®å‡¦ç†ã‚’è¿½ã£ã¦ã¿ã¾ã—ãŸã€‚ãã®ä¸ã§ ã‚«ãƒ¼ãƒãƒ«ã‚¹ã‚¿ãƒƒã‚¯ (switch_to() å†…ã§ pushl %ebp ã¨ã‹ã—ã¦å€¤ãŒç©ã¾ã‚Œã‚‹ã‚¹ã‚¿ãƒƒã‚¯)ã¨ã¯ãã®ã¨ãã®å®Ÿè¡Œã‚³ãƒ³ãƒ†ã‚ã‚¹ãƒˆã«ç´ã¥ãã‚«ãƒ¼ãƒãƒ«ãƒ—ãƒã‚»ã‚¹ã‚¹ã‚¿ãƒƒã‚¯ã¨ã„ã†ç†è§£ã§ã‚ˆã„ã‹ã€‚ ã¨ã„ã†ç–‘å•ãŒã‚‚ã‚„ã‚‚ã‚„æ¹§ã„ã¦å‡ºã¦ãã¾ã—ãŸã€‚ã“ã“æ•°æ—¥ ã¯ã˜ã‚ã¦èªã‚€486â€•32ãƒ“ãƒƒãƒˆã‚³ãƒ³ãƒ”ãƒ¥ãƒ¼ã‚¿ã‚’ã‚„ã•ã—ãèªžã‚‹ ã‚’èªã‚“ã§ã„ãŸã®ã§ã™ãŒã€ãã®ä¸ã«ã“ã®ç–‘å•ã¸ã®ç”ãˆã¸ã®å…¥ã‚Šå£ãŒè¼‰ã£ã¦ã„ã¾ã—ã¦ã€ãã“ã‚’ç³¸å£ã«èª¿ã¹ã¦ã¿ã¾ã—ãŸã€‚ã§ã€çµæžœã¨ã—ã¦ã¯ ç”ãˆ: è‰¯ã„ ã§ã—ãŸã€‚ x86 ã¯ç‰¹æ¨©ãƒ¬ãƒ™ãƒ«ã®ç§»è¡Œã¨é€£å‹•ã—ã¦ã‚¹ã‚¿ãƒƒã‚¯ãƒã‚¤ãƒ³ã‚¿ã‚’åˆ‡ã‚Šæ›¿ãˆã‚‹ä»•çµ„ã¿ã‚’æŒã£ã¦ã„ã¾ã™ã€‚Linux ã®å ´åˆãƒ¢ãƒ¼ãƒ‰ã¯ã‚«ãƒ¼ãƒãƒ«ãƒ¢ãƒ¼ãƒ‰(ç‰¹æ¨©ãƒ¬ãƒ™ãƒ«0) ã¨ãƒ¦ãƒ¼ã‚¶ãƒ¼ãƒ¢ãƒ¼ãƒ‰
hirata_yasuyuki 2007/11/08
linux

kernel
ãƒªãƒ³ã‚¯
Linux ã‚«ãƒ¼ãƒãƒ«ã®ã‚³ãƒ³ãƒ†ã‚ã‚¹ãƒˆã‚¹ã‚¤ãƒƒãƒå‡¦ç†ã‚’èªã¿è§£ã - naoyaã®ã¯ã¦ãªãƒ€ã‚¤ã‚¢ãƒªãƒ¼
Linux ã‚«ãƒ¼ãƒãƒ«ã®ãƒ—ãƒã‚»ã‚¹ã‚¹ã‚±ã‚¸ãƒ¥ãƒ¼ãƒ©ã®æ ¸ã§ã‚ã‚‹ kernel/sched.c ã® schedule() ã‚’èªã¿é€²ã‚ã¦ã„ãã¨ã€ã‚¿ã‚¹ã‚¯åˆ‡ã‚Šæ›¿ãˆ(å®Ÿè¡Œã‚³ãƒ³ãƒ†ã‚ã‚¹ãƒˆåˆ‡ã‚Šæ›¿ãˆ)ã¯ãã®åã‚‚ context_switch() ã¨ã„ã†é–¢æ•°ã«é›†ç´„ã•ã‚Œã¦ã„ã‚‹ã“ã¨ãŒåˆ†ã‹ã‚Šã¾ã™ã€‚2.6.20 ã® kernel/sched.c ã ã¨ä»¥ä¸‹ã®ã‚³ãƒ¼ãƒ‰ã§ã™ã€‚ 1839 static inline struct task_struct * 1840 context_switch(struct rq *rq, struct task_struct *prev, 1841 struct task_struct *next) 1842 { 1843 struct mm_struct *mm = next->mm; 1844 struct mm_struct *oldmm = prev->active_mm; 1845 184
hirata_yasuyuki 2007/11/08
linux

kernel
ãƒªãƒ³ã‚¯
ãƒžãƒ«ãƒã‚¹ãƒ¬ãƒƒãƒ‰ã®ã‚³ãƒ³ãƒ†ã‚ã‚¹ãƒˆåˆ‡ã‚Šæ›¿ãˆã«ä¼´ã†ã‚³ã‚¹ãƒˆ - naoyaã®ã¯ã¦ãªãƒ€ã‚¤ã‚¢ãƒªãƒ¼
ã¾ãŸ Linux ã‚«ãƒ¼ãƒãƒ«ã®è©±ã§ã™ã€‚ Linux ã§ã¯ fork ã«ã‚ˆã‚‹ãƒžãƒ«ãƒãƒ—ãƒã‚»ã‚¹ã¨ã€pthread ã«ã‚ˆã‚‹ãƒžãƒ«ãƒã‚¹ãƒ¬ãƒƒãƒ‰ã§ã®ä¸¦è¡Œå‡¦ç†ã‚’æ¯”è¼ƒã—ãŸå ´åˆã€å¾Œè€…ã®æ–¹ãŒã‚³ã‚¹ãƒˆãŒä½Žãé«˜é€Ÿã¨è¨€ã‚ã‚Œã¾ã™ã€‚ã€Œã‚¹ãƒ¬ãƒƒãƒ‰ã¯ãƒ¡ãƒ¢ãƒªç©ºé–“ã‚’å…±æœ‰ã™ã‚‹ã®ã§ã€ãƒžãƒ«ãƒãƒ—ãƒã‚»ã‚¹ã¨ã¯ç•°ãªã‚Šã‚³ãƒ³ãƒ†ã‚ã‚¹ãƒˆã‚¹ã‚¤ãƒƒãƒæ™‚ã«ãƒ¡ãƒ¢ãƒªç©ºé–“ã®åˆ‡ã‚Šæ›¿ãˆã‚’çœç•¥ã§ãã‚‹ã€‚åˆ‡ã‚Šæ›¿ãˆã«ä¼´ã†ã‚ªãƒ¼ãƒãƒ¼ãƒ˜ãƒƒãƒ‰ãŒå°‘ãªã„ã€‚ã€ã¨ã„ã†ã®ãŒ FAQ ã®ç”ãˆã‹ã¨æ€ã„ã¾ã™ã€‚ ãŒã€Œã‚ªãƒ¼ãƒãƒ¼ãƒ˜ãƒƒãƒ‰ãŒå°‘ãªã„ã€ã¨ä¸€è¨€ã«ã„ã‚ã‚Œã¦ã‚‚å…·ä½“çš„ã«ã©ã†ã„ã†ã“ã¨ãªã®ã‹ãŒã‚¤ãƒ¡ãƒ¼ã‚¸ã§ãã¾ã›ã‚“ã€‚ãã“ã§ Linux ã®ã‚¹ãƒ¬ãƒƒãƒ‰å‘¨ã‚Šã®å®Ÿè£…ã‚’è¦‹ã¦è¦‹ã‚ˆã†ã˜ã‚ƒãªã„ã‹ã€ã¨ã„ã†ã®ãŒä»Šå›žã®ãƒ†ãƒ¼ãƒžã§ã™ã€‚ 3åˆ†ã§ã‚ã‹ã‚‹(?) ãƒžãƒ«ãƒãƒ—ãƒã‚»ã‚¹ã¨ãƒžãƒ«ãƒã‚¹ãƒ¬ãƒƒãƒ‰ ã¾ãšã¯ã†ã‚“ã¡ãã€‚ãƒžãƒ«ãƒãƒ—ãƒã‚»ã‚¹ã¨ãƒžãƒ«ãƒã‚¹ãƒ¬ãƒƒãƒ‰ã®é•ã„ã®å›³ã€‚ä»¥å‰ã«ç¤¾å†…ã§å‹‰å¼·ä¼šã‚’ã—ãŸã¨ãã«ä½œã£ãŸè³‡æ–™ã«ã¡ã‚‡ã†ã©è‰¯ã„ã®ãŒã‚ã£ãŸã®ã§æŽ²è¼‰ã—ã¾ã™ã€‚Pthreadsãƒ—ãƒã‚°ãƒ©ãƒŸ
hirata_yasuyuki 2007/11/08
unix

thread

kernel
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