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64ãƒ“ãƒƒãƒˆCPU(AMD64+EM64T)ã§ã‚¢ã‚»ãƒ³ãƒ–ãƒ©
ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ãƒ¡ãƒ¢ ä»¥ä¸‹ã®è¨˜è¿°ã¯ã™ã¹ã¦ã€å½“æ–¹ãŒå¦ç¿’ã™ã‚‹éš›ã®å‚™å¿˜éŒ²ã¨ã—ã¦æ›¸ã„ã¦ã„ã‚‹ã‚‚ã®ã§ã™ã€‚ è¨˜è¿°ã«ã¯é–“é•ã„ãŒã‚ã‚‹ã‚‚ã®ã¨ãŠè€ƒãˆãã ã•ã„ã€‚ å†…å®¹ã«å¯¾ã™ã‚‹ä¿è¨¼ã¯è¡Œã„ã¾ã›ã‚“ã—ã€å†…å®¹ã«ã¤ã„ã¦ã„ã‹ãªã‚‹è²¬ä»»ã‚‚è² ã„ã¾ã›ã‚“ã®ã§ã€ ãã®æ—¨ã‚’ã”äº†æ‰¿ã„ãŸã ã„ãŸä¸Šã§ã€ãŠèªã¿ãã ã•ã„ã€‚ IEã§è¡¨ç¤ºã•ã›ãŸæ™‚ã«ç”»é¢ãƒ¬ã‚¤ã‚¢ã‚¦ãƒˆãŒå´©ã‚Œã€æ¨ªæ–¹å‘ã®ã‚¹ã‚¯ãƒãƒ¼ãƒ«ãƒãƒ¼ãŒå‡ºã‚‹å ´åˆãŒã‚ã‚Šã¾ã™ã€‚ ã“ã†ãªã£ãŸæ™‚ã¯ãƒªãƒãƒ¼ãƒ‰(æ›´æ–°)ã—ã¦ãã ã•ã„ã€‚
trashsuite 2011/01/12
asm
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off-by-one error ã§return addressãŒä¸Šæ›¸ãã•ã‚Œã‚‹ã¾ã§ - memologue
Phrack Magazine (http://phrack.org/phrack/55/P55-08) ã® off-by-one exploit ã‚’èªã¿ã¾ã—ãŸã€‚è¦ç´„ã—ã¦ãŠãã¾ã™ã€‚ void func(const char* sm) { char buffer[256]; for(int i=0; i<=256; ++i) { // 255ãŒæ£è§£ buffer[i] = sm[i]; } } int main(int argc, char** argv) { func(argv[1]); return 0; } ã“ã®ã‚ˆã†ãªã€1ãƒã‚¤ãƒˆã ã‘ã‚ªãƒ¼ãƒãƒ¼ãƒ•ãƒãƒ¼ã™ã‚‹bugã®ã‚ã‚‹ã‚³ãƒ¼ãƒ‰ã‚’æ›¸ã„ã¦ã—ã¾ã„ã€æ›´ã«å¼•æ•° sm ã«è‡ªç”±ãªãƒã‚¤ãƒˆåˆ—ã‚’è¨å®šã§ãã‚‹å ´åˆã€ãã‚ŒãŒã©ã®ã‚ˆã†ã«ã—ã¦ arbitrary code execution ã«ç¹‹ãŒã‚‹ã‹ãŒæ›¸ã„ã¦ã‚ã‚Šã¾ã™ã€‚ ä»¥ä¸‹ã€ç°¡å˜ãªè§£èª¬ã§ã™ã€‚ buffer[256] ã«ã¯
trashsuite 2010/04/13
ã€Žgccã¯ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆã§ã€ã‚¹ã‚¿ãƒƒã‚¯ã®æœ«å°¾ã‚’16ãƒã‚¤ãƒˆå¢ƒç•Œã«ã‚¢ãƒ©ã‚¤ãƒ³ã•ã›ã‚‹ã€

gcc

asm

c
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x86ã‚«ãƒ«ãƒˆã‚¯ã‚¤ã‚º (mitsunari@cybozu labs)
x86ã®è§£èª¬ã‚’ã„ã–å§‹ã‚ã¦ã¿ã‚‹ã¨ï¼Œã©ã†ã‚‚blogã¨ã„ã†åª’ä½“ã¯ã‚„ã‚Šã«ãã„ã®ã§åˆ¥ãƒšãƒ¼ã‚¸ã§é€²ã‚ã‚‹ã“ã¨ã«ã—ã¾ã—ãŸï¼Žã™ã„ã¾ã›ã‚“ï¼Žã¾ã¨ã‚ç›´ã™ã¾ã§ã—ã°ã‚‰ããŠå¾…ã¡ãã ã•ã„ï¼Žã‚ã¨åŸºæœ¬çš„ãªã“ã¨ã°ã‹ã‚Šç¶šã„ãŸã®ã§ï¼Œã¡ã‚‡ã£ã¨ãƒžãƒ‹ã‚¢ãƒƒã‚¯ãƒã‚¿ã«èµ°ã£ã¦ã¿ã¾ã™ï¼Ž ã¨ã„ã†ã‚ã‘ã§çªç„¶ã§ã™ãŒã‚¯ã‚¤ã‚ºã§ã™ï¼Žãã“ãã“é«˜ã„é›£æ˜“åº¦ã«è¨å®šã—ãŸã¤ã‚‚ã‚Šã§ã™ãŒï¼Œã„ã‹ãŒã§ã—ã‚‡ã†ï¼Žåˆå¿ƒè€…ã®æ–¹ã¯å…¨ç„¶åˆ†ã‹ã‚‰ãªãã¦ã‚‚å¤§ä¸ˆå¤«ã§ã™ï¼Žã‚ãˆã¦æ›–æ˜§ãªè¨˜è¿°ã‚’ã—ã¦ã„ã‚‹éƒ¨åˆ†ã‚‚ã‚ã‚Šã¾ã™ï¼Žå¾ŒåŠã®ç”ãˆã¯å‡„ã„ã‚‚ã®ãŒã‚ã‚‹ã¨ã„ã„ãªã‚ï¼Žã‚ã¨ï¼Œé›£å•å¥‡å•å‹Ÿé›†ä¸ï¼Ž ä»¥ä¸‹ã¯æ–ã‚ŠãŒãªã„é™ã‚Šï¼Œ ç’°å¢ƒã¯32bit OSä¸Šã®Pentium4ä»¥é™ã®x86 CPU é–¢æ•°ã®å‘¼ã³å‡ºã—è¦ç´„ã¯__cdecl é…åˆ—ã¯16byte alignmentã•ã‚Œã¦ã„ã¦è¤‡æ•°ã®é…åˆ—ã¯ã‚ªãƒ¼ãƒãƒ¼ãƒ©ãƒƒãƒ—ã—ã¦ã„ãªã„ ãƒ«ãƒ¼ãƒ—ã¯4ã®å€æ•°ã¨ä»®å®šã—ã¦ã‚ˆã„ ã‚‚ã®ã¨ã—ã¾ã™ï¼ŽCPUã«ä¾å˜ã™ã‚‹å ´åˆã¯æ˜Žè¨˜ã—ã¦ãã ã•ã„ï¼Ž Q1(5ç‚¹) ç¬¦å·ãªã—eaxã®å€¤ã‚’4
trashsuite 2009/08/18
asm

cpu
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AT&T Assembly Syntax | Sig9
This article is a â€˜quick-n-dirtyâ€™ introduction to the AT&T assem bly language syntax, as implemented in the GNU Assem blerÂ as(1). For the first timer the AT&T syntax may seem a bit confusing, but if you have any kind of assem bly language programming background, itâ€™s easy to catch up once you have a few rules in mind. I assume you have some familiarity to what is commonly referred to as the INTEL-syn
trashsuite 2009/08/10
asm

gas
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Using as
trashsuite 2009/08/10
asm

gas

reference
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http://docs.sun.com/app/docs/doc/817-5477?l=Ja
trashsuite 2009/08/09
AT&T å½¢å¼ã‚¢ã‚»ãƒ³ãƒ–ãƒªã®è§£èª¬ãƒ‰ã‚ãƒ¥ãƒ¡ãƒ³ãƒˆ / x86 ç³»

asm

sun
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CandASM
C ã¨ã‚¢ã‚»ãƒ³ãƒ–ãƒ© Cã‚’çŸ¥ã‚‹ãŸã‚ã«ã¯ã‚¢ã‚»ãƒ³ãƒ–ãƒ©ï¼ˆæ©Ÿæ¢°èªžï¼‰ã®çŸ¥è˜ãŒã‚ã‚‹ã“ã¨ãŒæœ›ã¾ã—ã„ã¨è¨€ã‚ã‚Œã¦ã„ã‚‹ã€‚ã—ã‹ã—ç¾åœ¨ã§ã¯ã‚¢ã‚»ãƒ³ãƒ–ãƒ©ã®è§£èª¬æ›¸ã¯ã»ã¨ã‚“ã©è¦‹ã‹ã‘ãªã„ã€‚ã‚‚ã£ã¨ã‚‚ã‚¢ã‚»ãƒ³ãƒ–ãƒ©ã‚’ï¼‘ã‹ã‚‰å¦ã¶ã®ã¯ã‚ˆã»ã©ã®å‹•æ©Ÿä»˜ã‘ãŒãªã„ã¨é›£ã—ã„ã§ã‚ã‚ã†ã€‚æ˜”ã¯ãƒ¡ãƒ¢ãƒªãŒå°‘ãªãCPUã‚‚é…ã‹ã£ãŸã®ã§æ©Ÿæ¢°èªžã¯å¿…é ˆã§ã‚ã£ãŸã€‚ ã“ã®è¬›åº§ã§ã¯C ã‚³ãƒ³ãƒ‘ã‚¤ãƒ©ãŒå‡ºã™ã‚³ãƒ¼ãƒ‰ã‚’è¦‹ã¦ã‚¢ã‚»ãƒ³ãƒ–ãƒ©ã®å‹‰å¼·ã‚’ã™ã‚‹ã“ã¨ã«ã™ã‚‹ã€‚ ãŸã ã—ã“ã“ã§æ‰±ã† CPU ã¯ Intel ã®ã„ã‚ã‚†ã‚‹ x86 ç³»ã®ã‚‚ã®ã§ã‚ã‚‹ã€‚ ã„ãã¤ã‹ã®ã‚¢ã‚»ãƒ³ãƒ–ãƒ©å‡ºåŠ›ã‚’ã¿ã‚‹ã¨æœ€é©åŒ–ãªã—ã®ã‚‚ã®ã¯ã¨ã‚“ã§ã‚‚ãªã„ã‚³ãƒ¼ãƒ‰ãŒå¤šãã¦å‹‰å¼·ã«ã¯æœ‰å®³ã¨æ€ãˆã‚‹ã»ã©ã§ã‚ã‚‹ã€‚æœ€é©åŒ–ã—ãŸæ–¹ã‚’ä¸»ã«è¦‹ã¦ã»ã—ã„ã€‚ ã‚¢ã‚»ãƒ³ãƒ–ãƒ©å…¥é–€ï¼ˆæœªå®Œæˆï¼‰ æ–‡å—åˆ—è¡¨ç¤ºã€€ C ã®ã‚½ãƒ¼ã‚¹ã€€ ã‚¢ã‚»ãƒ³ãƒ–ãƒ©ã®ã‚½ãƒ¼ã‚¹ã€€ è§£èª¬ è¶³ã—ç®—ã€€ Cã®ã‚½ãƒ¼ã‚¹ ã€€ã‚¢ã‚»ãƒ³ãƒ–ãƒ©ã®ã‚½ãƒ¼ã‚¹ã€€ è§£èª¬ã€€ æœ€é©åŒ–(-O2) å•é¡Œï¼‘ æ¡ä»¶æ–‡ã€€C ã®ã‚½ãƒ¼ã‚¹ã€€ ã‚¢ã‚»ãƒ³ãƒ–ãƒ©ã®ã‚½ãƒ¼ã‚¹ã€€ è§£èª¬
trashsuite 2009/08/09
gcc ã®åãã‚¢ã‚»ãƒ³ãƒ–ãƒªã‚³ãƒ¼ãƒ‰ã‚’èªã‚€

asm

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Gnu Assembler
é€šå¸¸Intelç³»ã®ã‚¢ã‚»ãƒ³ãƒ–ãƒ©ã¯ã€Intel Syntaxã¨å‘¼ã°ã‚Œã‚‹æ–‡æ³•ã‚’ä½¿ç”¨ã—ã¦ã„ã¾ã™ãŒã€GNU Assem blerã¯AT&T Syntaxã‚’ä½¿ç”¨ã—ã¦ã„ã¾ã™ã€‚ãã—ã¦ã€AT&T System V/386ã‚¢ã‚»ãƒ³ãƒ–ãƒ©ã®æ–‡æ³•ã¯ã€ã‚¤ãƒ³ãƒ†ãƒ« ã‚¢ã‚»ãƒ³ãƒ–ãƒ©ã®æ–‡æ³•ã¨éžå¸¸ã«ç•°ãªã£ã¦ã„ã¾ã™ã€‚BSD kernelã®ã‚¢ã‚»ãƒ³ãƒ–ãƒ©éƒ¨åˆ†ã¯AT&T SyntaxãŒä½¿ã‚ã‚Œã¦ã„ã‚‹ã®ã§ã€ã“ã‚Œã‚‰ã®é•ã„ã«ã¤ã„ã¦èª¬æ˜Žã—ã¦ãŠãã¾ã™ã€‚ ãªãŠç¾åœ¨ã®ã€GNU Assem blerã¯Intel Syntaxã‚‚ã‚µãƒãƒ¼ãƒˆã—ã¦ãŠã‚Šã€Intel Modeã¨AT&T ModeåŒæ–¹ã®å¤‰æ›´ãŒå¯èƒ½ã¨ãªã‚Šã¾ã™ã€‚ '.intel_syntax'ãƒ‡ã‚£ãƒ¬ã‚¯ãƒ†ã‚£ãƒ–ã‚’æŒ‡å®šã™ã‚‹äº‹ã«ã‚ˆã‚ŠIntel Mode '.att_syntax'ãƒ‡ã‚£ãƒ¬ã‚¯ãƒ†ã‚£ãƒ–ã‚’æŒ‡å®šã™ã‚‹äº‹ã«ã‚ˆã‚ŠAT&T Mode
trashsuite 2009/08/09
asm

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x86 Assembly/GNU assembly syntax - Wikibooks, open books for an open world
General Information[edit | edit source] Examples in this article are created using the AT&T assem bly syntax used in GNU AS. The main advantage of using this syntax is its compatibility with the GCC inline assem bly syntax. However, this is not the only syntax that is used to represent x86 operations. For example, NASM uses a different syntax to represent assem bly mnemonics, operands and addressing
trashsuite 2009/08/09
asm

gas
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ä½œè€…ãƒ›ãƒ¼ãƒ ãƒšãƒ¼ã‚¸ã‚µãƒ¼ãƒ“ã‚¹ï¼ˆhp.vectorï¼‰ã¯çµ‚äº†ã„ãŸã—ã¾ã—ãŸã€‚ é•·ã‚‰ãã®ã”åˆ©ç”¨ã€ã‚ã‚ŠãŒã¨ã†ã”ã–ã„ã¾ã™ã€‚ ã”ä¸æ˜Žãªç‚¹ãŒã‚ã‚Œã°ã€ãŠå•ã„åˆã‚ã›ãƒšãƒ¼ã‚¸ã‚’ã”è¦§ã®ä¸Šã€ãŠå•ã„åˆã‚ã›ãã ã•ã„ã€‚ â€»15ç§’å¾Œã«ãƒˆãƒƒãƒ—ãƒšãƒ¼ã‚¸ã«æˆ»ã‚Šã¾ã™ã€‚ (c) Vector HOLDINGS Inc.All Rights Reserved.
trashsuite 2009/08/09
asm

cpu

gas
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Assembly Programming Linux
ã¯ã˜ã‚ã«ï¼Ž ã‚¢ã‚»ãƒ³ãƒ–ãƒ©ã‚’ä½¿ã£ã¦ Linux ã®ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã§éŠã‚“ã§ã¿ã¾ã™ï¼Žã‚¢ã‚»ãƒ³ãƒ–ãƒ©ã«ã¯ NASM ã‚’ä½¿ç”¨ã—ã¦ï¼Œã‚«ãƒ¼ãƒãƒ«ã‚’ç›´æŽ¥åˆ©ç”¨ã™ã‚‹ã“ã¨ã«ã—ã¾ã™ï¼Ž ã„ã¾ã•ã‚‰ã‚¢ã‚»ãƒ³ãƒ–ãƒ©ã§ãƒ—ãƒã‚°ãƒ©ãƒ ã‚’ä½œæˆã™ã‚‹ã“ã¨ã¯ï¼Œæ™‚ä»£éŒ¯èª¤ã¨æ„Ÿã˜ã‚‹äººã‚‚ å¤šã„ã‹ã‚‚ã—ã‚Œã¾ã›ã‚“ï¼Žã€Œã‚¢ã‚»ãƒ³ãƒ–ãƒ©ã§ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ãªã‚“ã¦è·äººèŠ¸ã§ã—ã‚‡ã†ã€ ã¨æ€ã†ã‹ã‚‚ã—ã‚Œã¾ã›ã‚“ï¼Ž 20å¹´å‰ã§ã¯è¶£å‘³ã®ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã¯ BASIC ã‹ ã‚¢ã‚»ãƒ³ãƒ–ãƒ©ã—ã‹é¸æŠžè‚¢ãŒã‚ã‚Šã¾ã›ã‚“ ã§ã—ãŸãŒï¼Œä»Šã§ã¯Perl, Ruby ã‹ã‚‰ã‚¢ã‚»ãƒ³ãƒ–ãƒ©ã¾ã§ã®é–“ã«éžå¸¸ã«å¤šãã®è¨€èªžãŒã‚ã£ã¦ï¼Œ ã‚¢ã‚»ãƒ³ãƒ–ãƒ©ã¯æ™®é€šã§ã¯ä¸è¦ãªæœ€ä¸‹å±¤ã®çŸ¥è˜ã¨ãªã£ã¦ã„ã‚‹ã¨æ€ã„ã¾ã™ï¼Ž 10BaseT ã®ãƒ„ã‚¤ã‚¹ãƒˆãƒšã‚¢ã‚±ãƒ¼ãƒ–ãƒ«ã®ã‚¤ãƒ³ãƒ”ãƒ¼ãƒ€ãƒ³ã‚¹ã‚’æ°—ã«ã™ã‚‹äººã¯ã»ã¨ã‚“ã©ã„ãªã„ ã‚ˆã†ãªã‚‚ã®ã§ã—ã‚‡ã†ã‹? ã‚¢ã‚»ãƒ³ãƒ–ãƒªè¨€èªžã®å¦ç¿’ã§æœ€ã‚‚å›°é›£ãªã®ã¯ï¼Œæœ€è¿‘ã§ã¯æ›¸ç±ãŒè¦‹ã¤ã‹ã‚‰ãªã„ã“ã¨ ã‹ã‚‚ã—ã‚Œã¾ã›ã‚“ï¼Ž â€¦ã¨æ›¸ã„ã¦ã„ã¾ã—ãŸãŒã€ã¾ãŸå¢—ãˆã¦ãã¦ã„ã‚‹ã‚ˆã†ã§
trashsuite 2009/07/27
Linux + nasm

asm

linux
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IBM Developer
IBM Developer is your one-stop location for getting hands-on training and learning in-demand skills on relevant techno logies such as generative AI, data science, AI, and open source.
trashsuite 2009/07/27
asm

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ç›®æŒ‡ã›ãƒ—ãƒã‚°ãƒ©ãƒžãƒ¼ï¼
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trashsuite 2007/11/04
asm
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ã‚¢ãƒ«ã‚´ãƒªã‚ºãƒ å…¥é–€
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trashsuite 2007/11/04
algorithm

C

asm
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