x86 and x64 meaning
Difference between x64 and x86. It usually refers to x86 for 32 bit OS and x64 for system with 64 bit. Technically x86 simply refers to a family of processors and the instruction set they all use. ... The 64 bit computers can run both 32bit programs and 64 bit programs
x64 assembly windows
includelib kernel32.lib ; Windows kernel interface GetStdHandle proto ; Function to retrieve I/O handle WriteConsoleA proto ; Function writes to command window Console equ -11 ; Device code for console text output ExitProcess proto .code main proc sub RSP, 40 ; Reserve "shadow space" on stack ; Obtain "handle" for console display monitor I/O Streams mov RCX, Console ; Console standard output handle call GetStdHandle ; Returns handle in register RAX mov stdout, RAX ; Save handle for text display ; Display the "Hello, World!" Message mov RCX, stdout ; Handle to standard output device lea RDX, msg ; Pointer to message (byte array) mov R8, lengthof msg ; Number of characters to display lea R9, nbwr ; Number of btes actually written call WriteConsoleA ; Write text to command window add RSP, 40 ; Replace "shadow space" on stack mov RCX, 0 ; Set exit status code to zero call ExitProcess ; Return control to Windows main endp .data msg byte "Hello, World!" stdout qword ? ; Handle to standard output device nbwr qword ? ; Number of bytes actually written end
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