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radare
Radare is a portable reversing framework that can… Disassemble (and assemble for) many different architectures Debug with local native and remote debuggers (gdb, rap, webui, r2pipe, winedbg, windbg) Run on Linux, *BSD, Windows, OSX, Android, iOS, Solaris and Haiku Perform forensics on filesystems and data carving Be scripted in Python, Javascript, Go and more Support collaborative analysis using t
GitHub - mystor/micro-coreutils: An implementation of the unix commands yes, cat, and echo in as few bytes of executable as possible
These are minimal implementations of the unix utilities `yes`, `cat`, `echo`, `true` and `false`, written in x86-64 assembly for linux. The goal was to create an implementation which would consume the smallest number of bytes possible as a complete ELF executable. The micro program is a sloppily created program which will remove the section headers from the program in order to save on the space wh
Kernelï¼VM Advent Calendar Day 31. - φ(・・*)ã‚ž ｳｰï¾ã€€ã‚«ãƒ¼ãƒãƒ«ã¨ã‹å¼„ã£ãŸã‚Šã®ãƒ¡ãƒ¢
[OS]This article is for Kernelï¼VM Advent Calendar Day 31. Yeah, I know, 2010s Christmas was already finished, but never mind :) Last year I wrote a simple operating system kernel. actually, It doesn't have any useful features. though, it implements a hardware/software interrupt handler, a paging, a device driver, file system(very limited), and execute an ELF program(also very limited). I wish I di
Assembler/ãªãœx86ã§ã¯MBRãŒ"0x7C00"ã«ãƒãƒ¼ãƒ‰ã•ã‚Œã‚‹ã®ã‹ï¼Ÿ(完全版) - Glamenv-Septzen.net
ã©ã®ä¸–代ã§ã‚‚ã€å½“時ã®ãƒžã‚·ãƒ³ã«æ載ã•ã‚Œã¦ã„ãŸæ¨™æº–çš„ãªç‰©ç†ãƒ¡ãƒ¢ãƒªã‚’越ãˆãŸå ´æ‰€ã‚’指ã—ã¦ã„る。 ã“ã‚Œã¯å‰²ã‚Šè¾¼ã¿ãƒ™ã‚¯ã‚¿ã®å½±éŸ¿ã§ã‚¢ãƒ‰ãƒ¬ã‚¹0を使ãˆãªã„為ã¨ã€æœ€åˆã®å‘½ä»¤ãƒ•ã‚§ãƒƒãƒã‹ã‚‰å§‹ã¾ã‚‹åˆæœŸåŒ–プãƒã‚°ãƒ©ãƒ ã‚’ãªã‚‹ã¹ãアドレスã®é«˜ä½ã«é…ç½®ã™ã‚‹ã“ã¨ã§ã€ä¸€èˆ¬çš„ãªãƒ—ãƒã‚°ãƒ©ãƒ ã®ä½¿ãˆã‚‹ã‚¢ãƒ‰ãƒ¬ã‚¹ç©ºé–“を邪é”ã—ãªã„よã†ã«ã¨ã®æ„図らã—ã„。 BIOSãŒæ ¼ç´ã•ã‚ŒãŸROMã¯ã€é›»å回路ã®ãƒ¬ãƒ™ãƒ«ã§ã“れら高ä½ã‚¢ãƒ‰ãƒ¬ã‚¹ã«ãƒžãƒƒãƒ”ングã•ã‚Œã‚‹ã‚ˆã†èª¿æ•´ã•ã‚Œã¦ã„る。 IBM PC 5150 ã§ã¯ROM BIOSãŒFE000以é™ã«ãƒãƒ¼ãƒ‰ã•ã‚Œã‚‹ã‚ˆã†ã«ãªã£ã¦ãŠã‚Šã€ä¸åº¦ FFFF0H ã«ã€BIOSコードã®å…ˆé ã¸JMPã™ã‚‹æ©Ÿæ¢°èªžã‚³ãƒ¼ãƒ‰ãŒé…ç½®ã•ã‚Œã¦ã„る。（後述） ※1 : 80286ã¯24bitã®ã‚¢ãƒ‰ãƒ¬ã‚¹ãƒã‚¹ã‚’æŒã¤ãŒã€ãƒªã‚¢ãƒ«ãƒ¢ãƒ¼ãƒ‰ã§ã¯20bitã—ã‹ä½¿ã‚ã‚Œãªã„。A20-A23ã¯ãƒªã‚»ãƒƒãƒˆå¾Œã¯1ã«ãªã£ã¦ã„る。ãã®ãŸã‚ã€CSã“ã"F000H"ã«ãªã£ã¦ã„ã‚‹ãŒã€ã‚‚ã†4bit分
仙石浩明ã®æ—¥è¨˜: x86_64 Linux ãªã©ã® 64bit 環境㧠MD5 を使ã†ã¨ãã®æ³¨æ„点
MD5 (Message Digest Algorithm 5) ã¯ã€ RFC 1321 ã§ã‚¢ãƒ«ã‚´ãƒªã‚ºãƒ ãŒç´¹ä»‹ã•ã‚Œã¦ã„ã¦ã€ Appendix (付録) ã¨ã—㦠C ã«ã‚ˆã‚‹ãƒªãƒ•ã‚¡ãƒ¬ãƒ³ã‚¹å®Ÿè£…ãŒä»˜å±žã—ã¦ã„ã‚‹ãŒã€ ãã® global.h ã« /* UINT4 defines a four byte word */ typedef unsigned long int UINT4; ã¨æ›¸ã„ã¦ã‚る。 ã™ãªã‚ã¡ 32bit æ•´æ•°ã¨ã—㦠UINT4 型を定義ã—ã¦ã„る。 x86_64 Linux を始ã‚多ãã® 64bit Unix 㯠LP64 ã™ãªã‚ã¡ long int (ã¨ãƒã‚¤ãƒ³ã‚¿) ㌠64bit ãªæ•´æ•°ãƒ‡ãƒ¼ã‚¿ãƒ¢ãƒ‡ãƒ«ã‚’採用ã—ã¦ã„る。 ã—ãŸãŒã£ã¦ UINT4 åž‹ã®å®šç¾©ãŒ 「unsigned long int〠ã®ã¾ã¾ã§ã€ ã“ã® MD5 リファレンス実装を使ã£ã¦ã—ã¾ã†ã¨ã€ 32bit ã§ã‚ã‚‹ã¹ã UINT4
GCC Inline Assembler
"asm"ã¨"__asm__"ã¯ã€åŸºæœ¬çš„ã«ã¯åŒã˜ã§ã‚ã‚‹ãŒã€"__asm__"ã¯ä½¿ç”¨ã—ã¦ã„る言語ã®äºˆç´„語/関数ç‰ã¨ã¶ã¤ã‹ã‚‹å ´åˆä½¿ç”¨ã—ã¾ã™ã€‚ã¾ãŸã¯ANSI C互æ›ã®ã‚³ãƒ¼ãƒ‰ã‚’ã¤ãã£ã¦ã„ã‚‹å ´åˆã€"asm"ã‚ーワードãŒä½¿ç”¨ã§ããªããªã‚‹ã®ã§"__asm__"を使ã„ã¾ã™ã€‚ /* keyword asm ã¨åŒã˜é–¢æ•°*/ function asm(void){ } /* asmãŒä½¿ç”¨ã§ããªã„ã®ã§__asm__を使用 */ function inline(){ __asm__("asm code"); }
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GitHub - asamy/ksm: A fast, hackable and simple x64 VT-x hypervisor for Windows and Linux. Builtin userspace sandbox and introspection engine.
x86勉強会 - Google Groups
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