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sirocco id:sirocco

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æµ®å‹•å°æ•°ç‚¹æ¼”ç®—ã§ã¯ã¾ã£ãŸè©± æµ®å‹•å°æ•°ç‚¹æ¼”ç®—ã®ã‚ã‚ŠãŒã¡ãªå•é¡Œã§ã¯ã¾ã‚Šã¾ã—ãŸã€‚ ã„ã‚ã„ã‚èª¿ã¹ã¦ã„ã‚‹ã†ã¡ã« x86 ç‰¹æœ‰ã®ã¡ã‚‡ã£ã¨ãŠã‚‚ã—ã‚ã„ ç¾è±¡ã«éé‡ã—ãŸã®ã§ç´¹ä»‹ã—ãŸã„ã¨æ€ã„ã¾ã™ã€‚ ãƒ‘ãƒ¼ã‚»ãƒ³ãƒ†ãƒ¼ã‚¸ã®è¨ˆç®— ç°¡å˜ãª C ã®ãƒ—ãƒã‚°ãƒ©ãƒ ã§ãƒ‘ãƒ¼ã‚»ãƒ³ãƒ†ãƒ¼ã‚¸ã‚’è¨ˆç®—ã—ã‚ˆã†ã¨æ€ã„ã€ æ¬¡ã®ã‚ˆã†ãªã‚³ãƒ¼ãƒ‰ã‚’æ›¸ãã¾ã—ãŸã€‚ int x, y; ... int a = (double)x / y * 100; int a = x * 100 / y ã¨ã—ãªã„ã®ã¯ã€ x ãŒå¤§ãã„å ´åˆã« x * 100 ãŒ ã‚ªãƒ¼ãƒãƒ¼ãƒ•ãƒãƒ¼ã‚’èµ·ã“ã™ (INT_MAX ã‚’è¶Šãˆã‚‹) ãŸã‚ã§ã™ã€‚ ã“ã®ã‚³ãƒ¼ãƒ‰ã¯ä¸€è¦‹ã€æœŸå¾…é€šã‚Šã«å‹•ã„ã¦ã„ãŸã®ã§ã™ãŒã€ ã—ã°ã‚‰ãä½¿ã£ã¦ã„ã‚‹ã¨ã€æ‰‹å…ƒã®ç’°å¢ƒã§ã¯ x = 53, y = 100 ã®ã¨ãã« a ã¯ 53 ã§ã¯ãªã 52 ã«ãªã‚‹ã“ã¨ã«æ°—ã¥ãã¾ã—ãŸã€‚ ã“ã‚Œã¯æ¬¡ã®ç†ç”±ã«ã‚ˆã‚Šã¾ã™ã€‚ å¼ã®æœ€åˆã® (double)53 / 10
sirocco 2007/03/02
binary

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Xbyak - x86 JIT assembler -
Xbyak - x86, x64 JIT assem bler - .frame(English) .frame(x86ã®ç©¶æ¥µã®æœ€é©åŒ–æ‰‹æ³•?) Xbyak(ã‚«ã‚¤ãƒ“ãƒ£ãƒƒã‚¯)ã¯x86(IA32), x64(AMD64, x86-64)ã®ãƒžã‚·ãƒ³èªžå‘½ä»¤ã‚’ç”Ÿæˆã™ã‚‹C++ã®ã‚¯ãƒ©ã‚¹ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã§ã™. ãƒ—ãƒã‚°ãƒ©ãƒ å®Ÿè¡Œæ™‚ã«å‹•çš„ã«ã‚¢ã‚»ãƒ³ãƒ–ãƒ«ã™ã‚‹ã“ã¨ãŒå¯èƒ½ãªãŸã‚, æŸ”è»Ÿãªæœ€é©åŒ–(å‹•çš„ã‚³ãƒ¼ãƒ‰ç”Ÿæˆ)ãŒå¯èƒ½ã¨ãªã‚Šã¾ã™(åˆ©ç”¨ã‚·ãƒ¼ãƒ³:é‡ååŒ–ã®é«˜é€ŸåŒ–, å¼ã®è¨ˆç®—). æš—å·ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã«ä½¿ã£ã¦é«˜é€Ÿãªå®Ÿè£…ã‚’ã—ã¦ã¿ãŸ(very fast etaT pairing for Core 2 Duo) ãƒ˜ãƒƒãƒ€ãƒ•ã‚¡ã‚¤ãƒ«ã‚ªãƒ³ãƒªãƒ¼ xbyak.hã‚’ã‚¤ãƒ³ã‚¯ãƒ«ãƒ¼ãƒ‰ã™ã‚‹ã ã‘ã§ã™ãåˆ©ç”¨ã™ã‚‹ã“ã¨ãŒã§ãã¾ã™(32bit, 64bitä¸¡å¯¾å¿œ). Windows Xp(32bit, 64bit), Vista/Linux(32bit, 64bit)/Intel
sirocco 2007/01/24
c++

binary

jit
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WhirlwindTutorialOnCreatingReallyTeensyElfExecutablesForLinux -
WhirlwindTutorialOnCreatingReallyTeensyElfExecutablesForLinux - ç›®æ¬¡ Linux ã§å‹•ãæ¥µå° ELF å®Ÿè¡Œãƒ•ã‚¡ã‚¤ãƒ«ã‚’ã¤ãã‚‹æ€’æ¶›ã®ãƒãƒ¥ãƒ¼ãƒˆãƒªã‚¢ãƒ« (ã‚ã‚‹ã„ã¯ "Size Is Everything") ã‚³ãƒ¡ãƒ³ãƒˆ ä»¥ä¸‹ã®æ–‡ç« ã®æ—¥æœ¬èªžè¨³ã§ã™: http://www.muppetlabs.com/~breadbox/software/tiny/teensy.html gcc ã® info ã®æ—¥æœ¬èªžã¯ä»¥ä¸‹ã®ãƒšãƒ¼ã‚¸ã‹ã‚‰æ‹å€Ÿã—ã¾ã—ãŸ: http://www.asahi-net.or.jp/~wg5k-ickw/html/online/gcc-2.95.2/gcc_2.html#SEC13 Linux ã§å‹•ãæ¥µå° ELF å®Ÿè¡Œãƒ•ã‚¡ã‚¤ãƒ«ã‚’ã¤ãã‚‹æ€’æ¶›ã®ãƒãƒ¥ãƒ¼ãƒˆãƒªã‚¢ãƒ« (ã‚ã‚‹ã„ã¯ "Size Is Everything") She studied
sirocco 2006/12/15
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Binary Hacks - ãƒã‚¤ãƒŠãƒªã‚¢ãƒ³åº¦ãƒã‚§ãƒƒã‚¯
Binary Hacks çš„ãªæŠ€è¡“ã«ç²¾é€šã—ãŸã‚¨ãƒ³ã‚¸ãƒ‹ã‚¢ã®ã“ã¨ã‚’ã€å°‚é–€ç”¨èªžã§ ã€Œãƒã‚¤ãƒŠãƒªã‚¢ãƒ³ã€ã¨å‘¼ã³ã¾ã™ã€‚ ã“ã“ã§ã¯ã€ã¿ãªã•ã‚“ã®ãƒã‚¤ãƒŠãƒªã‚¢ãƒ³åº¦ã‚’è¨ºæ–ã§ãã‚‹ãƒã‚§ãƒƒã‚¯ãƒªã‚¹ãƒˆã‚’ç”¨æ„ã—ã¾ã—ãŸã€‚ ç›®æ¬¡ã‚’è¦‹ã¦ã€ ã€Œã“ã‚“ãªå†…å®¹ã¯ã¬ã‚‹ã„ã€ã¨æ€ã£ãŸæ–¹ã‚‚ã€ ã€Œãƒãƒƒãƒ‰ãƒŽã‚¦ãƒã‚¦ã°ã£ã‹ã‚Šã€ ã¨æ€ã£ãŸæ–¹ã‚‚ã€ãœã²æŒ‘æˆ¦ã—ã¦ã¿ã¦ãã ã•ã„ã€‚ è¨ºæ–ã«ã¯ JavaScript ãŒæœ‰åŠ¹ãªãƒ–ãƒ©ã‚¦ã‚¶ãŒå¿…è¦ã§ã™ã€‚ å•é¡Œã¯15å•ã‚ã‚Šã¾ã™ã€‚ è¨ºæ–ã‚¹ã‚¿ãƒ¼ãƒˆ
sirocco 2006/11/11
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ãƒ¦ãƒ¡ã®ãƒã‚«ãƒ©: Rubyã®ãƒ—ãƒãƒ•ã‚¡ã‚¤ãƒªãƒ³ã‚°
ã‚«ãƒ¼ãƒãƒ«èªæ›¸ä¼šã§mallocã®è©±ã‚’ã—ã¦ã„ãŸã ã„ãŸã®ã ãŒã€ãã®ã¨ãã®è³ªç–‘ã§Rubyã®å®Ÿè£…ã®è©±ãŒã§ãŸã€‚ãã“ã§æ€ã„ç«‹ã¡Rubyã‚’oprofileã§ãƒ—ãƒãƒ•ã‚¡ã‚¤ãƒ«ã—ã¦è¦‹ãŸã€‚ï¼ˆmatzã•ã‚“ã«ãƒˆãƒ©ãƒƒã‚¯ãƒãƒƒã‚¯ã‚’å¼µã£ã¦ãŠãï¼‰ # cd /usr/src/ruby-1.8.4/test # opcontrol --start; ruby runner.rb; opcontrol --stop é©å½“ãªRubyã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã‚’ã—ã‚‰ãªã‹ã£ãŸã®ã§ã€ãƒ†ã‚¹ãƒˆãƒ—ãƒã‚°ãƒ©ãƒ ã‚’å®Ÿè¡Œã—ã¦ãƒ™ãƒ³ãƒãƒžãƒ¼ã‚¯ã¨ã—ãŸã€‚å®Ÿè¡Œã—ãŸãƒžã‚·ãƒ³ã¯1700Mhzã®Pentium Mã€ãƒ¡ãƒ¢ãƒªï¼‘GBã®ãƒŽãƒ¼ãƒˆPCã€‚ # opreport -l CPU: CPU with timer interrupt, speed 0 MHz (estimated) Profiling through timer interrupt samplesÂ %Â Â Â Â Â app
sirocco 2006/11/08
binary

ruby
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O'Reilly Village / ã‚ªãƒ©ã®æ‘: ã€ŽBinary Hacksã€ã‚µãƒ³ãƒ—ãƒ«PDFï¼ˆï¼‹Extra Hacksï¼‰
Posted by Editor : 2006-10-31 17:53 ä¼èª¬ã®ã€ŒBinary 2.0ã‚«ãƒ³ãƒ•ã‚¡ãƒ¬ãƒ³ã‚¹ã€ã‹ã‚‰ç´„1å¹´ã‚’çµŒã¦ã€ŽBinary Hacksã€ã„ã‚ˆã„ã‚ˆç™ºå£²ã§ã™ã€‚ã™ã§ã«ã‚ªãƒ³ãƒ©ã‚¤ãƒ³æ›¸åº—ã§ã¯å¤šãã®æ–¹ã«ã”äºˆç´„ã„ãŸã ã„ã¦ã„ã‚‹ã‚ˆã†ã§ã€æœ¬å½“ã«ã‚ã‚ŠãŒã¨ã†ã”ã–ã„ã¾ã™ã€‚ ã“ã®æœ¬ã®ç‰¹å¾´ã«é–¢ã—ã¦ã¯ã€è‘—è€…ã®ä¸€äººã§ã‚ã‚‹é«˜æž—ã•ã‚“ã®ã‚µã‚¤ãƒˆã§è©³ã—ãç´¹ä»‹ã•ã‚Œã¦ã„ã¾ã™ã®ã§ã€ãœã²ãƒã‚§ãƒƒã‚¯ã—ã¦ãã ã•ã„ã€‚ ã¾ãŸã€ä»Šå›žå…¬é–‹ã™ã‚‹ã‚µãƒ³ãƒ—ãƒ«PDFï¼ˆ33ãƒšãƒ¼ã‚¸ã€556KBï¼‰ã«ã¯ã€æ›¸ç±ã«åŽéŒ²ã§ããªã‹ã£ãŸHackã‚’2æœ¬ã€ŒExtra Hackã€ã¨ã—ã¦åŽéŒ²ã—ã¾ã—ãŸã€‚å·åˆå²éƒŽã•ã‚“ã®ã€Œæœ¬æ›¸ã«å¯„ã›ã¦ã€ã‚„ã€â€œãªãœã€ä»Šã€Binaryãªã®ã‹â€ã«ã¤ã„ã¦æ›¸ã‹ã‚Œã¦ã„ã‚‹ã€Œã¯ã˜ã‚ã«ã€ã‚‚å¿…èªã§ã™ã€‚ãœã²ã”è¦§ãã ã•ã„ã€‚ï¼ˆæ‹…å½“ï¼šTï¼‰ ãƒ»ã‚µãƒ³ãƒ—ãƒ«PDFã®å†…å®¹ -æœ¬æ›¸ã«å¯„ã›ã¦ -ã‚¯ãƒ¬ã‚¸ãƒƒãƒˆ -ã¯ã˜ã‚ã« -[Hack #10]ã€€objdumpã§ã‚ªãƒ–ã‚¸ã‚§ã‚¯
sirocco 2006/11/03
book

binary
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http://0xcc.net/pub/decon2006/
sirocco 2006/09/09
development

binary
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1