[B! Wataru] siroccoã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

sirocco id:sirocco

Wataruã«é–¢ã™ã‚‹siroccoã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (7)

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Wataru's memo(2007-04-11)
â— [Linux][Writing] ä¸–ç•Œä¸€å˜ç´”ãªå®Ÿè¡Œãƒ•ã‚¡ã‚¤ãƒ«ãƒ•ã‚©ãƒ¼ãƒžãƒƒãƒˆ binfmt_flat Computer Architecture Series ç¬¬äºŒä½œã®ãŸã‚ã«ã€æ—¥ã€…ç´ æä½œã‚Šã‚’é€²ã‚ã¦ã„ã‚‹ã®ã§ã™ãŒã€ã“ã®ä½œæ¥ã®é–“ã« "binfmt_flat" ã¨ã„ã†ã‚ªã‚¿ãƒƒã‚ãƒ¼ãªãƒ¢ã‚¸ãƒ¥ãƒ¼ãƒ«ãŒèª•ç”Ÿã—ã¾ã—ãŸã€‚ä»Šæ—¥ã¯ã€ã“ã®ãƒ¢ã‚¸ãƒ¥ãƒ¼ãƒ«ã‚’ä½¿ã£ãŸ "Hello golf" ã‚’ã”ç´¹ä»‹ã—ã¾ã—ã‚‡ã†(æ³¨: æ˜¨å¹´ä¸€ä¸–ã‚’é¢¨é¡ã—ãŸ ELF golf ã§ã¯ã‚ã‚Šã¾ã›ã‚“ã®ã§ã€ã‚ã—ã‹ã‚‰ãš)ã€‚ åˆå¦è€…ã®ç†è§£ã‚’é˜»ã‚€è¤‡é›‘ãª ELF çš†ã•ã‚“ã”å˜ã˜ã®é€šã‚Šã€PC-UNIX ä¸Šã«ãŠã‘ã‚‹æ¨™æº–ã®ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆãƒ•ã‚¡ã‚¤ãƒ«ãƒ•ã‚©ãƒ¼ãƒžãƒƒãƒˆã¯ ELF (Executable and Linking Format) ã§ã™ãŒã€ã“ã®ãƒ•ã‚©ãƒ¼ãƒžãƒƒãƒˆã¯é«˜æ©Ÿèƒ½ã‚’è¿½æ±‚ã—ã¦ã„ã‚‹ãŸã‚ã€å†…éƒ¨ã¯ã‹ãªã‚Šè¤‡é›‘ãªä½œã‚Šã«ãªã£ã¦ã„ã¾ã™ã€‚ å®Ÿã¯ã€å½“åˆ Computer Architecture Se
sirocco 2007/04/17
linux

assembler

Wataru
ãƒªãƒ³ã‚¯
Wataru's memo(2007-02-18) [Books][UNIX] Advanced Programming in the UNIX Environment 2nd Edition
â— [Books][UNIX] Advanced Programming in the UNIX Environment 2nd Edition 2002å¹´ã®åˆé ã€æ—§ã‚µã‚¤ãƒˆã®ãŠå‹§ã‚ã®æ›¸ã¨ã„ã†ãƒšãƒ¼ã‚¸ä¸Šã«ãŠã„ã¦ã€ï¼’å†Šã®UNIX ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°è§£èª¬æ›¸ã‚’ç´¹ä»‹ã—ã¾ã—ãŸã€‚æ—©ã„ã‚‚ã®ã§æ™‚ã‚’çµŒã‚‹ã“ã¨ã€ï¼•å¹´ã€‚ã“ã®é–“ã€ç§ã‚‚è‰²ã€…å‹‰å¼·ã—ã¾ã—ãŸã—ã€ãƒ†ã‚ã‚¹ãƒˆã«å¯¾ã™ã‚‹è¦‹æ–¹ã‚‚å¤‰ã‚ã‚Šã¾ã—ãŸã€‚ãã“ã§ã€ï¼•å‘¨å¹´(?)ã‚’è¨˜å¿µã—ã¦ã€2007å¹´ç‰ˆ UNIX ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ãŠå‹§ã‚ã®æ›¸ã€ï¼•å†Šã‚’ã‚·ãƒªãƒ¼ã‚ºã§ã”ç´¹ä»‹ã—ã¾ã—ã‚‡ã†ã€‚ ãƒˆãƒƒãƒ—ãƒãƒƒã‚¿ãƒ¼ã¯ã€Advanced Programming in the UNIX Environment ã®ç¬¬äºŒç‰ˆ ã€‚é€šç§°ã€APUEã€‚UNIX ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã«é–¢ã™ã‚‹ã€ä¸–ç•Œçš„ãƒªãƒ•ã‚¡ãƒ¬ãƒ³ã‚¹æ›¸ã¨ã—ã¦æœ‰åã§ã™ã€‚æ®‹å¿µãªãŒã‚‰ã€è‘—è€…ã§ã‚ã‚‹ Stevens æ°ã¯1999å¹´48æ³ã®è‹¥ã•ã§äº¡ããªã‚Šã¾ã—ãŸã€‚ APUE ã®åˆç‰ˆåŸ·ç†ã¯1992å¹´
sirocco 2007/02/19
book

Wataru
ãƒªãƒ³ã‚¯
Wataru's memo(2007-02-10)
æœ€åˆã®ï¼“ã¤ã¯ FDC (Floppy Disk Controller)å†…éƒ¨ã®ã‚¹ãƒ†ãƒ¼ã‚¿ã‚¹ãƒ¬ã‚¸ã‚¹ã‚¿ãƒ¼ã®å†…å®¹ã§ã‚ã‚Šã€èª¬æ˜Žã¯å‰²æ„›ã—ã¾ã™ã€‚é‡è¦ãªãƒ‡ãƒ¼ã‚¿ã¯ç¶šãï¼”ãƒã‚¤ãƒˆã§ã™ã€‚å…ˆé ã¯ãƒˆãƒ©ãƒƒã‚¯ç•ªå·(å®Ÿéš›ã¯ã‚·ãƒªãƒ³ãƒ€ãƒ¼ç•ªå·ã§ã™ãŒã€ä¸¡è€…ã®é•ã„ã‚’èª¬æ˜Žã™ã‚‹éš›ã«å›³ãŒå¿…è¦ã®ãŸã‚ã€ä¾¿å®œä¸Šãƒˆãƒ©ãƒƒã‚¯ã¨ã—ã¾ã™)ã€ï¼’ç•ªç›®ã¯ãƒ˜ãƒƒãƒ‰ç•ªå·ã€ï¼“ç•ªç›®ã¯ã‚»ã‚¯ã‚¿ãƒ¼ç•ªå·ã€ï¼”ç•ªç›®ã¯ã‚»ã‚¯ã‚¿ãƒ¼é•·ã€‚ã“ã®ã€Œï¼”ã¤çµ„ã¿ã€ã¯ã€ãã‚Œãžã‚Œã®é æ–‡å—ã‚’å–ã‚Š "CHRN" ã¨å‘¼ã°ã‚Œã€FDC åˆ¶å¾¡ã®å‹˜æ‰€ã¨ãªã£ã¦ã„ã¾ã™ã€‚ å„ãƒ‡ãƒ¼ã‚¿ã¯ï¼‘ãƒã‚¤ãƒˆé•·ã®ãŸã‚ã€æœ€å¾Œã®ã‚»ã‚¯ã‚¿ãƒ¼é•·ã¯èª¬æ˜Žã«ã‚ã‚‹ã‚ˆã†ãªãƒ‘ãƒ©ãƒ¡ãƒ¼ã‚¿ã¨ãªã£ã¦ã„ã¾ã™ã€‚å…·ä½“çš„ã«ã¯ã€N=1ã®æ™‚ï¼’ï¼•ï¼–ãƒã‚¤ãƒˆã€N=2ã®æ™‚ï¼•ï¼‘ï¼’ãƒã‚¤ãƒˆã€N=7ã®æ™‚ï¼‘ï¼–ï¼“ï¼˜ï¼”ãƒã‚¤ãƒˆã«ãªã‚Šã¾ã™ã€‚ä¸Šè¨˜ä¾‹ã® N ã¯ï¼’ã«ãªã£ã¦ã„ã¾ã™ã‹ã‚‰ã€FORMAT.COM ã§åˆæœŸåŒ–ã•ã‚ŒãŸãƒˆãƒ©ãƒƒã‚¯ã®ã‚»ã‚¯ã‚¿ãƒ¼é•·ã¯ï¼•ï¼‘ï¼’ãƒã‚¤ãƒˆã§ã‚ã‚‹ã“ã¨ãŒåˆ†ã‹ã‚Šã¾ã™ã€‚ ã•ã¦ã€ãƒˆãƒ©ãƒƒã‚¯ã¯å††ã§ã™ã‹ã‚‰ã€readid
sirocco 2007/02/12
Wataru
ãƒªãƒ³ã‚¯
Wataru's memo(2007-02-03)ï¼šMagic number 1440 (ï¼“ã¤ã®ãƒ•ã‚©ãƒ¼ãƒžãƒƒãƒˆç·¨)
â— [Thoughts][Publish] Magic number 1440 (ï¼“ã¤ã®ãƒ•ã‚©ãƒ¼ãƒžãƒƒãƒˆç·¨) USB ãƒ¡ãƒ¢ãƒªã®æ™®åŠã«ã‚ˆã‚Šã€ãƒ•ãƒãƒƒãƒ”ã‚£ãƒ‡ã‚£ã‚¹ã‚¯ã¯çµ¶æ»…å¯¸å‰ã®çŠ¶æ³ã«ã‚ã‚Šã¾ã™ãŒã€ã“ã®ãƒ¬ã‚¬ã‚·ã‚£ãƒ‡ãƒã‚¤ã‚¹ã«ã¯ Sense of wonder ã¨ã€æ•™ç§‘æ›¸ã«ã¯æ›¸ã‹ã‚Œã¦ã„ãªã„å¤šãã®å®ãŒçœ ã£ã¦ã„ã¾ã™ã€‚Linux ä¸Šã«ç”¨æ„ã•ã‚Œã¦ã„ã‚‹å°æ´’è½ãŸãƒ„ãƒ¼ãƒ«ã‚’æ´»ç”¨ã—ã¦ã€èª°ã‚‚è¦‹å‘ãã“ã¨ã®ãªããªã£ã¦ã—ã¾ã£ãŸãƒ•ãƒãƒƒãƒ”ã‚£ãƒ‡ã‚£ã‚¹ã‚¯ã«ã€ãµãŸãŸã³ã‚¹ãƒãƒƒãƒˆãƒ©ã‚¤ãƒˆã‚’ã‚ã¦ã¦ã¿ã¾ã—ã‚‡ã†ã€‚ superformat ã«ã‚ˆã‚‹åˆæœŸåŒ– ã“ã‚Œã‹ã‚‰ã®å®Ÿé¨“ã¯ã€æ˜¯éžã¨ã‚‚æ‰‹å…ƒã« Linux ç’°å¢ƒã‚’ç”¨æ„ã—ã€å®Ÿéš›ã«è‡ªåˆ†ã®æ‰‹ã§å®Ÿè¡Œã—ã¦ã¿ã‚‹ã“ã¨ã‚’ãŠå‹§ã‚ã—ã¾ã™ã€‚Linux ã§ã‚ã‚Œã°ã€ãƒ‡ã‚£ã‚¹ãƒˆãƒªãƒ“ãƒ¥ãƒ¼ã‚·ãƒ§ãƒ³ã¯å•ã„ã¾ã›ã‚“ãŒã€æœ€è¿‘æµè¡Œã‚Šã®ä»®æƒ³ç’°å¢ƒã¯ãƒãƒ„ã§ã™ã€‚ã€Œãƒãƒ¼ãƒ‰ã‚¦ã‚§ã‚¢ã‚’æ·±ãå‘³ã‚ã†ã€å ´åˆã€ä»®æƒ³ç’°å¢ƒã§ã¯å½¹ã«ç«‹ã¡ã¾ã›ã‚“ã€‚ ãªãŠã€ä»Šå¾Œä½¿ç”¨ã™ã‚‹å„ç¨®ã®ãƒ„ãƒ¼ãƒ«ã¯ Linux ä¸Šã§
sirocco 2007/02/07
linux

driver

Wataru
ãƒªãƒ³ã‚¯
Wataru's memo(2007-01-27)ï¼šMagic number 1440 (FAT8 ç·¨)
â— [Thoughts][Publish] Magic number 1440 (FAT8 ç·¨) é “æŒ«ã—ã¦ã„ãŸ "Magic number 1440 ã‚·ãƒªãƒ¼ã‚º" ã‚’å†é–‹ã™ã‚‹å‰ã«ã€ä¸€è¨€çš†æ§˜ã«ãŠè©«ã³ã—ã¦ãŠã‹ãªã‘ã‚Œã°ãªã‚‰ãªã„ã“ã¨ãŒã‚ã‚Šã¾ã™ã€‚2006/11/3 ã®ãƒ¡ãƒ¢ ã«ãŠã„ã¦ã€ç§ã¯å¤å·äº«æ°ã®è¨˜äº‹ã‚’å¼•ç”¨ã—ã€ã€ŒMicrosoft ãŒ NEC N88-DISK BAISC ã§æŽ¡ç”¨ã•ã‚Œã¦ã„ãŸ FAT ã‚’çœŸä¼¼ãŸã€ã¨ã®è¡¨è¨˜ã‚’è¡Œã£ã¦ãŠã‚Šã¾ã—ãŸãŒã€ãã®å¾Œèª¿ã¹ç›´ã—ãŸã¨ã“ã‚ã€ã“ã®è¨˜è¿°ã¯å…¨ãã®èª¤ã‚Šã§ã‚ã‚‹ã“ã¨ãŒåˆ¤æ˜Žã—ã¾ã—ãŸã€‚ ã¡ãªã¿ã«ã€å¤å·æ°ã®è¡¨ç¾ã¯ã€ŒNEC N88-DISC BASIC ç”¨ã®ãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ ã¨ã—ã¦é–‹ç™ºã•ã‚ŒãŸFATã‚’MS-DOSã«ã‚‚ä½¿ã†ã€ã§ã‚ã‚Šã€ç§ãŒã“ã®æ–‡ç« ã‚’èª¤ã£ã¦è§£é‡ˆã—ãŸã“ã¨ãŒåŽŸå› ã®ã‚ˆã†ã§ã™ã€‚ ã©ã“ãŒèª¤ã‚Šã§ã‚ã£ãŸã®ã‹ã€ã„ãã¤ã‹ã®è³‡æ–™ã‹ã‚‰ã”èª¬æ˜Žã—ãŸã„ã¨æ€ã„ã¾ã™ã€‚ NEC PC-8000 ã‚·ãƒªãƒ¼ã‚º æ®‹å¿µãª
sirocco 2007/01/30
Wataru
ãƒªãƒ³ã‚¯
Wataru's memo(2006-11-03) - Magic number 1440 (Floppy disk format æ´å²ç·¨)
â— [Thoughts][Publish] Magic number 1440 (Floppy disk format æ´å²ç·¨) ã€2006/11/7 è£œè¶³ã€‘ 1.44 MiB ã¨ã„ã†è¡¨è¨˜ã¯é–“é•ã„ã§ã—ãŸã®ã§ã€ä»¥ä¸‹è¨‚æ£ãŠã‚ˆã³è£œè¶³ã‚’è¡Œã„ã¾ã—ãŸã€‚ Magic number 1440 ãŒç§ã«å›ãã‹ã‘ã‚‹ã‚‚ã†ã²ã¨ã¤ã®æ„å‘³ã¯ã€ãƒ•ãƒãƒƒãƒ”ã‚£ãƒ‡ã‚£ã‚¹ã‚¯ãƒ»ãƒ•ã‚©ãƒ¼ãƒžãƒƒãƒˆã«é–¢ä¿‚ã—ã¦ã„ã¾ã™ã€‚çš†ã•ã‚“ã”å˜ã˜ã®é€šã‚Šã€ç¾åœ¨ä¸»æµã¨ãªã£ã¦ã„ã‚‹3.5ã‚¤ãƒ³ãƒFDã®ãƒ•ã‚©ãƒ¼ãƒžãƒƒãƒˆå¾Œå®¹é‡ã¯ "1440KB" ã§ã™(IECè¡¨è¨˜ã§ã¯ã€1440KiB, Ki = kilobinary = 2^10)ã€‚ ãƒ–ãƒãƒƒã‚¯ãƒ‡ãƒã‚¤ã‚¹ã‚’ãƒ•ã‚¡ã‚¤ãƒ«ã¨ã—ã¦å–ã‚Šæ‰±ã†ã“ã¨ã®ã§ãã‚‹ UNIX ã§ã¯ã€ãƒ‡ã‚£ã‚¹ã‚¯ã®ä¸èº«ã‚’æ„è˜ã™ã‚‹å¿…è¦ã¯ãªã„ã®ã§ã™ãŒã€ä¸ã«ã¯ "ãªãœ1440ãªã®ï¼Ÿ" ã¨ç–‘å•ã‚’æ„Ÿã˜ã¦ãŠã‚‰ã‚Œã‚‹æ–¹ã‚‚ã„ã‚‰ã£ã—ã‚ƒã‚‹ã“ã¨ã§ã—ã‚‡ã†ã€‚ ãƒ•ãƒãƒƒãƒ”ã‚£ãƒ‡ã‚£ã‚¹ã‚¯ãŒæŒã¤ magic numbe
sirocco 2006/11/05
Wataru
ãƒªãƒ³ã‚¯
Wataru's memo(2006-10-15)
â— [Thoughts] ã‚³ãƒ³ãƒ”ãƒ¥ãƒ¼ã‚¿å¦ç¿’ã«ãŠã‘ã‚‹Tåž‹ãƒ•ã‚©ãƒ¼ãƒ‰ GNUé–‹ç™ºãƒ„ãƒ¼ãƒ«å‡ºç‰ˆå¾Œã®ã‚ã‚‹æ—¥ã€ä»Šå¹´7æœˆæ—¥çµŒ Enterprise Platoform 2006 ã«æŽ²è¼‰ã•ã‚ŒãŸ Alan Kay æ°ã¸ã®ã‚¹ãƒšã‚·ãƒ£ãƒ«ã‚¤ãƒ³ã‚¿ãƒ“ãƒ¥ãƒ¼ãŒç›®ã«ã¨ã¾ã‚Šã¾ã—ãŸã€‚ã“ã‚Œã¯ã€æµ…è¦‹ç›´æ¨¹æ°ã«ã‚ˆã‚‹ "ã‚¢ãƒ©ãƒ³ãƒ»ã‚±ã‚¤ãŒæããƒ‘ã‚½ã‚³ãƒ³ã®æœªæ¥åƒ" ã¨é¡Œã™ã‚‹ã‚¤ãƒ³ã‚¿ãƒ“ãƒ¥ãƒ¼è¨˜äº‹ã§ã€å‰ãƒ»ä¸ãƒ»å¾Œç·¨ã®ä¸‰éƒ¨ä½œã«ãªã£ã¦ã„ã¾ã™ã€‚ æœ€è¿‘æµè¡Œã‚Šã®Webåª’ä½“ã¯ã€åºƒå‘Šã®æ´ªæ°´ã®ä¸ã§ç›®çš„ã®è¨˜äº‹ãŒã‹ã‚ã†ã˜ã¦é¡”ã‚’è¦—ã‹ã›ã¦ã„ã‚‹ã‚‚ã®ãŒå¤§å‹¢ã‚’å ã‚ã¦ã„ã¾ã™ã€‚å†…å®¹ã¸ã®èˆˆå‘³ã‚ˆã‚Šã‚‚ä¸å¿«æ„ŸãŒå…ˆã«ç«‹ã¤ãŸã‚ã€ç§ã¯ã“ã®æ‰‹ã®åª’ä½“ã¯æ»…å¤šã«èªã¾ãªã„ã®ã§ã™ãŒã€æœ¬è¨˜äº‹ã¯é•ã„ã¾ã—ãŸã€‚åºƒå‘Šã¯æœ€å°é™ã«æŠ‘ãˆã‚‰ã‚Œã€ä¸Šè³ªãªé›‘èªŒè¨˜äº‹ã‚’èªã‚“ã§ã„ã‚‹ã‹ã®ã‚ˆã†ã§ã™ã€‚ åˆ†è§£ã—ã‚„ã™ã„ã‚ˆã†ã«ã¯è¨è¨ˆã•ã‚Œã¦ã„ãªã„ å¾Œç·¨ã®ä¸ç¨‹ã§ã€æ¬¡ã®ã‚ˆã†ãªæ®µè½ã«å‡ºä¼šã„ã¾ã—ãŸã€‚ ç¾åœ¨ã¨60å¹´å‰ã§ã¯æœ¬è³ªçš„ãªé•ã„ãŒã‚ã‚‹ã€‚ä¾‹ãˆã°ã€ã‚‚ã—ã‚ãªãŸãŒåä¾›ã«ã€ä½•
sirocco 2006/10/16
Wataru
ãƒªãƒ³ã‚¯
1