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LLVM - Wikipedia
LLVMï¼ˆã‚¨ãƒ«ã‚¨ãƒ«ãƒ´ã‚£ãƒ¼ã‚¨ãƒ ã€ ã¾ãŸã¯ã‚¨ãƒ«ã‚¨ãƒ«ãƒ–ã‚¤ã‚¨ãƒ ï¼‰ã¨ã¯ã€ã‚³ãƒ³ãƒ‘ã‚¤ãƒ«æ™‚ã€ãƒªãƒ³ã‚¯æ™‚ã€å®Ÿè¡Œæ™‚ãªã©ã‚ã‚‰ã‚†ã‚‹æ™‚ç‚¹ã§ãƒ—ãƒã‚°ãƒ©ãƒ ã‚’æœ€é©åŒ–ã™ã‚‹ã‚ˆã†è¨è¨ˆã•ã‚ŒãŸã€ä»»æ„ã®ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°è¨€èªžã«å¯¾å¿œå¯èƒ½ãªã‚³ãƒ³ãƒ‘ã‚¤ãƒ©åŸºç›¤ã§ã‚ã‚‹ã€‚å½“åˆã¯ã€LLVMã®åç§°ã®ç”±æ¥ã¯ã€Low Level Virtual Machine (ä½Žæ°´æº–ä»®æƒ³æ©Ÿæ¢°) ã®ç•¥ã§ã‚ã‚‹ã¨ã—ã¦ã„ãŸãŒ[3]ã€ç¾åœ¨ã¯ã€ä½•ã®é æ–‡å—ã§ã‚‚ãªã„ã¨ã—ã¦ã„ã‚‹[4]ã€‚ LLVMã¯ã€ãƒ—ãƒ©ãƒƒãƒˆãƒ•ã‚©ãƒ¼ãƒ ã«ä¾å˜ã—ãªã„ä¸é–“è¡¨ç¾ã§ã‚ã‚‹LLVM-IRã‚’ç”Ÿæˆã—ã€LLVM-IRã‚’ç‰¹å®šã®ãƒžã‚·ãƒ³ã®æ©Ÿæ¢°èªžãªã©ã«å¤‰æ›ã™ã‚‹ã€‚LLVM-IRã®æ®µéšŽã§ã€è¨€èªžã‚„ãƒ—ãƒ©ãƒƒãƒˆãƒ•ã‚©ãƒ¼ãƒ ã¨ã¯ç‹¬ç«‹ã—ãŸæœ€é©åŒ–ã‚’è¡Œã†ã€‚ã“ã®æ–¹æ³•ã«ã‚ˆã£ã¦LLVMã¯è¨€èªžã‹ã‚‰ã‚‚ã‚¢ãƒ¼ã‚ãƒ†ã‚¯ãƒãƒ£ã‹ã‚‰ã‚‚ç‹¬ç«‹ã—ã¦ãŠã‚Šã€ãã‚Œãžã‚Œã«ç‰¹åŒ–ã—ãŸã€ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°è¨€èªžå›ºæœ‰ã®ãƒ¢ã‚¸ãƒ¥ãƒ¼ãƒ«ã¨ã€ãƒžã‚·ãƒ³å‘ã‘ã‚³ãƒ¼ãƒ‰ç”Ÿæˆéƒ¨ã‚’ç”¨æ„ã™ã‚‹ã“ã¨ã«ã‚ˆã‚Šæ§˜ã€…ãªè¨€èªžã‚¢ãƒ¼ã‚ãƒ†ã‚¯ãƒãƒ£ãƒ¼ã«å¯¾å¿œã™ã‚‹ã€‚LL
trashsuite 2010/04/14
LLVM

gcc

programming
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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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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 2009/08/11
gcc
ãƒªãƒ³ã‚¯
UNIX USER æŽ²è¼‰è¨˜äº‹ä¸€è¦§
ç¬¬ä¸‰éƒ¨é–‹å§‹ã«å‘ã‘ã¦ ç§é”ã¯ï¼‘ï¼˜å›žã«ãŠã‚ˆã¶é€£è¼‰ã‚’é€šã˜ã¦ã€ã©ã®ã‚ˆã†ãªç’°å¢ƒã«ç½®ã‹ã‚Œã¦ã‚‚ã€è‡ªåŠ›ã§é“ã‚’åˆ‡ã‚Šé–‹ã‘ã‚‹ã ã‘ã®åŸºç¤Žä½“åŠ›ã‚’èº«ã«ã¤ã‘ã¾ã—ãŸã€‚ãã“ã§ã€ã„ã‚ˆã„ã‚ˆGCCãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°å·¥æˆ¿ç¬¬ä¸‰éƒ¨ã®å¹•é–‹ã‘ã§ã™ã€‚ã“ã‚Œã‹ã‚‰ã—ã°ã‚‰ãã€PC/AT ãƒãƒ¼ãƒ‰ã‚¦ã‚§ã‚¢ã®æœ€æ·±éƒ¨ã‚’æŽ¢è¨ªã™ã‚‹æ—…ãŒç¶šãã¾ã™ã€‚ UNIX USERã®èªè€…ã®æ–¹ã€…ã§ã‚ã‚Œã°ã€ã‚«ãƒ¼ãƒãƒ«ã«èˆˆå‘³ã‚’æŒã¡ã€ãã®ã‚½ãƒ¼ã‚¹ãƒ„ãƒªãƒ¼è§£èªã«æŒ‘æˆ¦ã—ãŸçµŒé¨“ã‚’ãŠæŒã¡ã®æ–¹ã¯å¤šã„ã“ã¨ã¨æ€ã„ã¾ã™ã€‚ã—ã‹ã—ã€ãã®æŒ‘æˆ¦ã®ã»ã¨ã‚“ã©ã¯ã€æœ€åˆã®ãƒ–ãƒ¼ãƒˆãƒ—ãƒã‚»ã‚¹ã§é “æŒ«ã—ã¦ã—ã¾ã£ãŸã®ã§ã¯ãªã„ã§ã—ã‚‡ã†ã‹ï¼Ÿã‚«ãƒ¼ãƒãƒ«ã®èµ·å‹•ã‚’å®Œå…¨ã«ç†è§£ã™ã‚‹ãŸã‚ã«ã¯ã€å‘¨è¾ºãƒ‡ãƒã‚¤ã‚¹ã«é–¢ã™ã‚‹ãƒãƒ¼ãƒ‰ã‚¦ã‚§ã‚¢ãƒ¬ãƒ™ãƒ«ã®çŸ¥è˜ãŒå¿…è¦ã¨ã•ã‚Œã‚‹ãŸã‚ã€ã“ã‚Œã¯ä»•æ–¹ãŒã‚ã‚Šã¾ã›ã‚“ã€‚ ã¨ã“ã‚ãŒã€æ›¸åº—ã«è¶³ã‚’é‹ã‚“ã§ã¿ã‚Œã°åˆ†ã‹ã‚Šã¾ã™ãŒã€ã‚ãƒ¼ãƒœãƒ¼ãƒ‰ã‚„VGAãƒ‡ã‚£ã‚¹ãƒ—ãƒ¬ã‚¤ã€ãƒ•ãƒãƒƒãƒ”ãƒ¼ãƒ‡ã‚£ã‚¹ã‚¯ã‚„RS-232Cãªã©ã®åŸºæœ¬I/Oè£…ç½®ã‚’ã€æ©Ÿæ¢°èªžãƒ¬ãƒ™ãƒ«ã§ç›´æŽ¥åˆ¶å¾¡ã™ã‚‹æ–¹æ³•ã«è§¦ã‚ŒãŸæ›¸ç±ã¯
trashsuite 2009/07/07
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gcc

linux

Unix
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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 2008/12/20
linux

C

gcc

kernel
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1