WebNov 18, 2024 · It runs on various operating systems including DOS, Linux, Unix, and Windows. It supports the x86 and x86-64 instruction sets including SIMD extensions MMX, SSE - SSE4, and AVX. Contents 1 Hexadecimal Numbers 2 Labels 2.1 Anonymous Labels 2.2 Local Labels 3 Operators 3.1 The $ Operator 3.2 The # Operator 3.3 The ` Operator 4 Built … Webinc, dec Increment, decrement The inc instruction increments the contents of its operand by one The dec instruction decrements the contents of its operand by one Examples dec eax ; subtract one from the contents ; of EAX. inc DWORD PTR [var] ; add one to the 32-; bit integer stored at ; location var
Overview of common x86 instructions Infosec Resources
WebMar 4, 2016 · In x86, after you set ecx to zero and then do inc ecx, the register ecx will hold the value 1. The inc mnemonic increments by a step of 1, regardless of register passed as … WebEAX AX AH 32 16 8 High-speed memory that reduces the frequency of access by the CPU to conventional memory is called cache memory Adding 0FFh and 05h in an 8-bit register sets the Overflow flag. False Which Operation Mode provides compatibility for legacy 8086 programs? Real-Address mode Match the datatype to its use/description. BYTE WORD … immediately stop
Assembly - Arithmetic Instructions - TutorialsPoint
WebNov 18, 2011 · И так в начало процедуры регистрации по адресу 540628 делаем «классический» патч xor eax,eax // обнуляем EAX inc eax // EAX = EAX +1 Retn // return Сохраняем изменения. ПКМ-> Copy to executable -> All modifications -> Save file. http://sparksandflames.com/files/x86InstructionChart.html WebSep 10, 2016 · mov eax , dword [esi+0xC] ; eax = VirtualAddress add eax , dword [esi+8] ; eax += VirtualSize mov edx , dword [ecx+28h] ;save OEP add edx , dword [ecx+34h] ;Add Image base to OEP sub eax , virSize ; eax -= virSize (start of virus code) mov dword [ecx+28h] , eax ;set new entry point mov esi , virStart ; esi = base of code add esi , dword [esp] ; … immediately surrounding area