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kosaki id:kosaki

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GNU GCC æœ€é©åŒ–ã‚ªãƒ—ã‚·ãƒ§ãƒ³ã¨stripå‰å¾Œã®ãƒ•ã‚¡ã‚¤ãƒ«ã‚µã‚¤ã‚ºã®æ¯”è¼ƒ lsã‚³ãƒžãƒ³ãƒ‰ç·¨
GNUã®GCCã‚³ãƒ³ãƒ‘ã‚¤ãƒ©ã§ã¯ã€æœ€é©åŒ–ãƒ¬ãƒ™ãƒ« -O0 - -O3ã¨ã‚µã‚¤ã‚ºé‡è¦–ã®-Osã€ã•ã‚‰ã«ãƒã‚¤ãƒŠãƒªã®ã‚¹ãƒˆãƒªãƒƒãƒ—æ©Ÿèƒ½ãŒã‚ã‚Šã¾ã™ã€‚ æœ€é©åŒ–ãƒ¬ãƒ™ãƒ«ã«ã‚ˆã£ã¦ã€ç”Ÿæˆã•ã‚Œã‚‹ãƒã‚¤ãƒŠãƒªã®ã‚µã‚¤ã‚ºãŒå¤‰ã‚ã£ã¦ãã¾ã™ã€‚ ã‚¹ãƒˆãƒªãƒƒãƒ—(strip)ã«ã‚ˆã£ã¦ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆãƒ•ã‚¡ã‚¤ãƒ«ã®ã‚·ãƒ³ãƒœãƒ«ã‚’å‰Šé™¤ã™ã‚‹ã“ã¨ã«ã‚ˆã£ã¦ã‚‚ãƒ•ã‚¡ã‚¤ãƒ«ã‚µã‚¤ã‚ºã¯å¤‰ã‚ã£ã¦ãã¾ã™ã€‚ gcc version 3.4.6 [FreeBSD] 20060305ã«ã¯æœ€é©åŒ–ãƒ¬ãƒ™ãƒ«ã«ã¯ -O0 -O1 -O2 -O3 -Os ãŒã‚ã‚Šã¾ã™ã€‚ gccã«-Wl,-sã‚’ã¤ã‘ã‚‹ã“ã¨ã§ldã‚³ãƒžãƒ³ãƒ‰ã«stripã®æŒ‡ç¤ºã‚’å‡ºã™ã“ã¨ãŒã§ãã¾ã™ã€‚ ä»Šå›žã¯ã€lsã‚³ãƒžãƒ³ãƒ‰ã®ã‚³ãƒ³ãƒ‘ã‚¤ãƒ«ã‚ªãƒ—ã‚·ãƒ§ãƒ³ã§æœ€é©åŒ–ãƒ¬ãƒ™ãƒ«ã®è¨å®šã‚’å¤‰æ›´ã—ãŸã‚Šã€stripã®æœ‰ã‚Šç„¡ã—ã§ã€ã§ãã‚ãŒã‚‹ãƒã‚¤ãƒŠãƒªã‚µã‚¤ã‚ºã‚’æ¯”è¼ƒã—ã¦ã¿ã¾ã—ãŸã€‚ ã‚³ãƒ³ãƒ‘ã‚¤ãƒ«ã‚³ãƒžãƒ³ãƒ‰ã¯ä¸‹è¨˜ã®é€šã‚Šã§ã™ã€‚ cc -lutil cmp.c ls.c print.c uti
kosaki 2010/02/11
gcc
ãƒªãƒ³ã‚¯
Linux ã®å…±æœ‰ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã®æŒ™å‹•ã«ã¤ã„ã¦ - daily dayflower
å‰ãƒ•ãƒªãŒé•·ããªã£ãŸã®ã§åŸºç¤Žçš„ãªéƒ¨åˆ†ã¯ç‹¬ç«‹ã—ãŸ article ã«ã—ã¾ã—ãŸã€‚ã§ã‚‚åŸºç¤Žçš„ãªå†…å®¹ã ã‘ã«é–“é•ã„ãŒå¤šãã†ã§ã™ã€‚ã”æŒ‡æ‘˜ãŠé¡˜ã„ã—ã¾ã™ã€‚ ä¸‹è¨˜ã«ã€ŒHack#??ã€ã¨æ›¸ã„ã¦ã‚ã‚‹ã‚‚ã®ã¯ã™ã¹ã¦ Binary Hacks ã® Hack ã§ã™ã€‚æ›¸ç±ã‚’ãŠæŒã¡ã®æ–¹ã¯ãã¡ã‚‰ã‚’ã”å‚ç…§ãã ã•ã„ã€‚ åŸºç¤Ž ã¾ãšç”¨èªžå®šç¾©ã‚’å¼•ç”¨ã—ã¦ãŠãã¾ã™ã€‚ ã‚·ãƒ³ãƒœãƒ«ï¼ˆsymbolï¼‰ ä¸€èˆ¬çš„ã«ã¯è¨˜å·ã‚’æ„å‘³ã™ã‚‹ãŒï¼ŒBinary Hacks ã®æ–‡è„ˆã§ã¯ï¼Œãƒªãƒ³ã‚«ãŒé–¢æ•°ã‚„å¤‰æ•°ã‚’è˜åˆ¥ã™ã‚‹ã¨ãã«ç”¨ã„ã‚‹åå‰ã®ã“ã¨ã‚’æŒ‡ã™ã€‚ Binary Hacks - Hack#6 ï¼ˆå¼·èª¿éƒ¨ã¯ dayflower ã«ã‚ˆã‚‹ï¼‰ ã•ã¦ï¼Œå…±æœ‰ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã‚’åˆ©ç”¨ã™ã‚‹éš›ã®æŒ™å‹•ã«ã¤ã„ã¦ã€ŒHack#6 é™çš„ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã¨å…±æœ‰ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã€ã‹ã‚‰æŠœç²‹ã—ã¾ã™ã€‚ ã“ã“ã§ã®ãƒã‚¤ãƒ³ãƒˆã¯ï¼Œå…±æœ‰ãƒ©ã‚¤ãƒ–ãƒ©ãƒªå˜ä½ã§å‡¦ç†ãŒè¡Œã‚ã‚Œã‚‹ã¨ã„ã†ã“ã¨ã¨ï¼Œãƒªãƒ³ã‚¯ã™ã‚‹æ™‚ã«ã¯å¿…è¦ã¨ã—ã¦ã„ã‚‹å…±æœ‰ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã® SONAME ã
kosaki 2009/12/28
linux

gcc
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ld 2.18 ã® -Bsymbolic ã‚ªãƒ—ã‚·ãƒ§ãƒ³ã‚’ä½¿ã†ã¨å…±æœ‰ãƒ©ã‚¤ãƒ–ãƒ©ãƒªå†…ã§ã‚·ãƒ³ãƒœãƒ«ã‚’ãƒãƒ¼ã‚«ãƒ«ãƒã‚¤ãƒ³ãƒ‰ã§ãã‚‹ - daily dayflower
Linux ã®å…±æœ‰ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã®æŒ™å‹•ã«ã¤ã„ã¦ - daily dayflower ã®ç¶šãã§ã™ã€‚ ä¸‹è¨˜ã¯ Ubuntu Hardy (8.04) i386 ã§å‹•ä½œç¢ºèªã—ã¾ã—ãŸã€‚ ld 2.18 ã® -Bsymbolic ã‚ªãƒ—ã‚·ãƒ§ãƒ³ æ˜¨æ—¥æ›¸ã„ãŸé€šã‚Šï¼ŒLinux ã§å…±æœ‰ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã‚’åˆ©ç”¨ã—ãŸãƒ—ãƒã‚°ãƒ©ãƒ ã‚’ä½œã‚‹å ´åˆï¼Œå…±æœ‰ãƒ©ã‚¤ãƒ–ãƒ©ãƒªå†…éƒ¨ã®é–¢æ•°å‘¼ã³å‡ºã—ï¼ˆã‚„å¤‰æ•°ã‚¢ã‚¯ã‚»ã‚¹ï¼‰ã¯ ld.so ã‚’çµŒç”±ã—ã¦è¡Œã‚ã‚Œã¾ã™ã€‚ ã“ã®ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹ã‚²ã‚¤ãƒ³ã‚„ã‚·ãƒ³ãƒœãƒ«è§£æ±ºã®å±é™ºæ€§ã‚’è§£æ±ºã™ã‚‹ãŸã‚ã« ld 2.18 ã‹ã‚‰ -Bsymbolic ã‚ªãƒ—ã‚·ãƒ§ãƒ³ãŒæ–°è¨ã•ã‚Œã¾ã—ãŸã€‚ãƒžãƒ‹ãƒ¥ã‚¢ãƒ«ã‹ã‚‰å¼•ç”¨ã—ã¾ã™ã€‚ -Bsymbolic When creating a shared library, bind references to global symbols to the definition within the shared library,
kosaki 2009/12/28
linux

gcc
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GCC some extensions
gcc(Gnu C Compiler)ã®æ‹¡å¼µæ–‡æ³• [è¦å‘Š!] C/C++è¨€èªžåˆå¿ƒè€…ã¯ã“ã®ãƒšãƒ¼ã‚¸ã‚’èªã¾ãªã„ã§ãã ã•ã„ã€‚ ã“ã®ãƒšãƒ¼ã‚¸ã§ã¯gccç‹¬è‡ªã®C/C++æ‹¡å¼µæ–‡æ³•ã«ã¤ã„ã¦è§£èª¬ã—ã¾ã™ã€‚ ã“ã‚Œã‚‰ã®æ‹¡å¼µæ–‡æ³•ãŒå¯èƒ½ã«ã™ã‚‹æ©Ÿæ§‹ã¯ç¢ºã‹ã«ä¾¿åˆ©ãªã®ã§ã™ãŒã€ ã‚‚ã¡ã‚ã‚“ANSIè¦æ ¼ã«å¾“ã£ã¦ã„ãªã„ã®ã§ã€ä¸€èˆ¬çš„ã«ã¯ä½¿ã†ã¹ãã§ã¯ã‚ã‚Šã¾ã›ã‚“ã€‚ C/C++è¨€èªžæ–‡æ³•ã‚’å¦ã³å§‹ã‚ã¦ã„ã‚‹åˆå¿ƒè€…ã¯ã“ã‚Œã‚‰gccæ‹¡å¼µæ–‡æ³•ã‚’ çŸ¥ã‚‹ã¹ãã§ã¯ã‚ã‚Šã¾ã›ã‚“ã€‚C/C++è¨€èªžã‚’æ£ã—ãç†è§£ã™ã‚‹ä¸Šã§å¤§ããª æ”¯éšœã¨ãªã‚Šã¾ã™ã€‚ C/C++è¨€èªžã‚’ååˆ†ã«ç†ŸçŸ¥ã—ãŸè€…ã¯ã€gccãŒã“ã®ã‚ˆã†ãªã“ã¨ã‚‚ã™ã‚‹ã“ã¨ã‚’ ã€Œé›‘è«‡ã€ã¨ã—ã¦çŸ¥ã£ã¦ãŠãã¨æ¥½ã—ã„ã‹ã‚‚ã—ã‚Œã¾ã›ã‚“ã€‚ã‚‚ã¡ã‚ã‚“ å®Ÿæˆ¦ã«ä½¿ã†ã¹ãã§ã¯ã‚ã‚Šã¾ã›ã‚“ãŒã€‚ã—ã‹ã—åˆå¿ƒè€…ãŒå¶ç„¶ã«ã€ã“ã‚Œã‚‰ã® æ©Ÿèƒ½ã‚’ä½¿ã£ã¦ã†ã¾ãã„ãå ´åˆãŒã‚ã‚Šã¾ã™ã®ã§ã€ãã®ã‚ˆã†ãªåˆå¿ƒè€…ã‚’ è¦‹ã¤ã‘ãŸã‚‰ã€ãã‚ŒãŒæ¨™æº–è¦æ ¼ã§ã¯ãªã„ã“ã¨ã‚’æ³¨æ„ã—ã¦ãã ã•ã„ã€‚ é…åˆ—å¤‰æ•°ã‚’ã‚³ãƒ”ãƒ¼
kosaki 2008/12/29
gcc
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kosaki 2008/12/29
gcc
ãƒªãƒ³ã‚¯
memcpy æœ€é©åŒ– - kazuhoã®ãƒ¡ãƒ¢ç½®ãå ´
ãƒã‚¤ãƒˆå˜ä½ã§ã‚³ãƒ”ãƒ¼ã™ã‚‹ã‚¢ãƒ›ãªã‚³ãƒ¼ãƒ‰ã®æ–¹ãŒã€å‹æ‰‹ã«ãƒ™ã‚¯ãƒˆãƒ«åŒ–ã•ã‚Œã‚‹åˆ†ã€gcc å†…è”µã®ãƒ¤ãƒ„ã‚ˆã‚Šæœ€å¤§ï¼“å€é«˜é€Ÿãªã‚“ã ã£ã¦www memcpy() compiled with vectorizing compilers All current compilers for linux should support SSE2 auto-vectorization with #include <string.h> void *(memcpy)(void *restrict b, const void *restrict a, size_t n){ char *s1 = b; const char *s2 = a; for(; 0<n; --n)*s1++ = *s2++; return b; }(ä¸ç•¥) x86-64 gcc memcpy() (ä¸ç•¥) Linking in a user-compiled
kosaki 2008/06/16
ãƒã‚¤ãƒˆå˜ä½ã§ã‚³ãƒ”ãƒ¼ã™ã‚‹ã‚¢ãƒ›ãªã‚³ãƒ¼ãƒ‰ã®æ–¹ãŒã€å‹æ‰‹ã«ãƒ™ã‚¯ãƒˆãƒ«åŒ–ã•ã‚Œã‚‹åˆ†ã€gcc å†…è”µã®ãƒ¤ãƒ„ã‚ˆã‚Šæœ€å¤§ï¼“å€é«˜é€Ÿ

gcc
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GCC Inline Assembler
"asm"ã¨"__asm__"ã¯ã€åŸºæœ¬çš„ã«ã¯åŒã˜ã§ã‚ã‚‹ãŒã€"__asm__"ã¯ä½¿ç”¨ã—ã¦ã„ã‚‹è¨€èªžã®äºˆç´„èªž/é–¢æ•°ç‰ã¨ã¶ã¤ã‹ã‚‹å ´åˆä½¿ç”¨ã—ã¾ã™ã€‚ã¾ãŸã¯ANSI Cäº’æ›ã®ã‚³ãƒ¼ãƒ‰ã‚’ã¤ãã£ã¦ã„ã‚‹å ´åˆã€"asm"ã‚ãƒ¼ãƒ¯ãƒ¼ãƒ‰ãŒä½¿ç”¨ã§ããªããªã‚‹ã®ã§"__asm__"ã‚’ä½¿ã„ã¾ã™ã€‚ /* keyword asm ã¨åŒã˜é–¢æ•°*/ function asm(void){ } /* asmãŒä½¿ç”¨ã§ããªã„ã®ã§__asm__ã‚’ä½¿ç”¨ */ function inline(){ __asm__("asm code"); }
kosaki 2008/03/31
gcc

asm
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gccã®fastcallé–¢æ•°å‘¼ã³å‡ºã—ã«ã¤ã„ã¦ : no hacking, no life
èƒŒæ™¯ æœ€è¿‘ã€å‰è·ã®å‹é”ã‚„å¾Œè¼©ã€ã¾ãŸãã®å¾Œè¼©ã®ä¼šç¤¾ã®æ–¹ã€…ãªã©ã§ã€ŒLinuxã‚«ãƒ¼ãƒãƒ«å‹‰å¼·ä¼šã€ãªã‚‹ã‚‚ã®ã‚’ã¯ã˜ã‚ã¾ã—ãŸã€‚å‹‰å¼·ä¼šã¨ã„ã£ã¦ã‚‚èªæ›¸ä¼šã«è¿‘ãã€ã€ŒLinuxã‚«ãƒ¼ãƒãƒ«è§£èªå®¤ã€ã¨ã„ã†æœ¬ã‚’ä½¿ã£ã¦ã®å‹‰å¼·ä¼šã§ã€ã“ã®å‰æ—©é€Ÿç¬¬ï¼‘å›žãŒã‚ã‚Šã€ç¬¬ï¼‘ç« ã®ã€Œãƒ—ãƒã‚»ã‚¹ã‚¹ã‚±ã‚¸ãƒ¥ãƒ¼ãƒªãƒ³ã‚°ã€ã«ã¤ã„ã¦è¡Œã„ã¾ã—ãŸã€‚ ã¿ã‚“ãªã§è°è«–ãªã©ã‚’ã—ã¦ã€æ›¸ã‹ã‚Œã¦ã‚‹ã“ã¨ã¯å¤§ä½“ç†è§£ã§ãã¾ã—ãŸãŒã€ã‚„ã¯ã‚Šå‰æçŸ¥è˜ãŒãŸãã•ã‚“å¿…è¦ãªã©ã®ç†ç”±ã‹ã‚‰ä¸æ˜Žãªæ‰€ãŒä½•ç‚¹ã‹ã‚ã£ãŸã®ã§ã€ãã®ä¸€ã¤ã«ã¤ã„ã¦èª¿ã¹ã¦ã¿ã¾ã—ãŸã€‚ (ä»¥é™ã®èª¬æ˜Žã¯linux kernel 2.6.15ï¼ˆx86ï¼‰ã‚’å…ƒã«ã—ã¦ã„ã¾ã™ã€‚) ã‚ã‹ã‚‰ãªã‹ã£ãŸäº‹ ãã®ã‚ã‹ã‚‰ãªã‹ã£ãŸäº‹ã«ã¤ã„ã¦èª¬æ˜Žã—ã¾ã™ã€‚ ä»¥ä¸‹ã¯ã€Linuxã‚«ãƒ¼ãƒãƒ«ãŒè¡Œã†ã‚³ãƒ³ãƒ†ã‚ã‚¹ã‚¹ã‚¤ãƒƒãƒã®éƒ¨åˆ†ã®æ ¸ã¨ãªã‚‹switch_to ã¨ã„ã†ãƒžã‚¯ãƒã§ã™ã€‚ include/asm-i386/system.h #define switch_to(prev,n
kosaki 2007/09/26
gcc

kernel

linux
ãƒªãƒ³ã‚¯
Binary2.0 Conference 2006 ç™ºè¡¨è³‡æ–™ - memologue
b2con 2006ã®ç™ºè¡¨è³‡æ–™ã‚’ç½®ãã¾ã—ãŸã€‚ "Hello, binary world!" (PDF, ã‚¢ãƒ‹ãƒ¡ãªã—) ã”æ¥å ´é ‚ã„ãŸçš†æ§˜ã€ä¸»å‚¬è€…ã®çš†æ§˜ã€ã©ã†ã‚‚ã‚ã‚ŠãŒã¨ã†ã”ã–ã„ã¾ã—ãŸã€‚ã‚ãŸã—è‡ªèº«ã‚‚ã¨ã¦ã‚‚æ¥½ã—ã‚ã¾ã—ãŸã€‚IRCã®æ§˜åãŒä¼šå ´ã§ã‚‚è¦‹ã‚‰ã‚ŒãŸã®ã¯ã‚ˆã‹ã£ãŸã¨æ€ã„ã¾ã™*1ã€‚ä»–ã®ã‚¹ãƒ”ãƒ¼ã‚«ãƒ¼ã®çš†ã•ã‚“ã®ç™ºè¡¨è³‡æ–™ã¯ã“ã¡ã‚‰ã€‚ (è¿½è¨˜) ä¼šå ´ã§Dan Kogaiã•ã‚“ã«è³ªå•ã„ãŸã ã„ãŸã€__attribute__ã®æ‹¬å¼§ãŒäºŒé‡ãªã®ã¯ä½•æ•…ï¼Ÿã¨ã„ã†ä»¶ãªã‚“ã§ã™ãŒã€y-hamigakiã•ã‚“ãŒè§£èª¬ã‚’æ›¸ã„ã¦ãã ã•ã£ã¦ã„ã¾ã™ã€‚ã‚ã‚ŠãŒã¨ã†ã”ã–ã„ã¾ã™ã€‚ãªã‚‹ã»ã©ã€‚ *1:ä¼šå ´è¨å–¶æ™‚ã«ã€shudoã•ã‚“ãŒæ©Ÿè»¢ã‚’ãã‹ã›ã¦ã‚¹ã‚¯ãƒªãƒ¼ãƒ³ã‚’è¨ç½®ã—ã¦ãã ã•ã£ãŸã‚ˆã†ã§ã™
kosaki 2006/12/18
ä½è—¤ã•ã‚“ã®è³‡æ–™

gcc

linux

binary2.0
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kosaki 2006/03/07
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kosaki 2006/03/07
gcc

gas

asm

programming
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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.
kosaki 2006/03/07
linux

gcc

gas

asm

x86
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