넷와이드 어셈블러

section .textorg 0x100movah, 0x9movdx, helloint0x21movax, 0x4c00int0x21section .datahello:db 'Hello, world!', 13, 10, '$'

global _mainextern _MessageBoxA@16extern _ExitProcess@4section code use32 class=code_main:pushdword 0 ; UINT uType = MB_OKpushdword title ; LPCSTR lpCaptionpushdword banner ; LPCSTR lpTextpushdword 0 ; HWND hWnd = NULLcall_MessageBoxA@16pushdword 0 ; UINT uExitCodecall_ExitProcess@4section data use32 class=databanner:db 'Hello, world!', 0title:db 'Hello', 0

global _startsection .text_start:moveax, 4 ; writemovebx, 1 ; stdoutmovecx, msgmovedx, msg.lenint0x80 ; write(stdout, msg, strlen(msg));moveax, 1 ; exitmovebx, 0int0x80 ; exit(0)section .datamsg:db"Hello, world!", 10.len:equ$ - msg

global _startsection .dataquery_string:db"Enter a character: "query_string_len:equ$ - query_stringout_string:db"You have input: "out_string_len:equ$ - out_stringsection .bssin_char:resw 4section .text_start:movrax, 0x2000004 ; put the write-system-call-code into register raxmovrdi, 1; tell kernel to use stdoutmovrsi, query_string; rsi is where the kernel expects to find the address of the messagemovrdx, query_string_len; and rdx is where the kernel expects to find the length of the messagesyscall; read in the charactermovrax, 0x2000003; read system callmovrdi, 0; stdinmovrsi, in_char; address for storage, declared in section .bssmovrdx, 2; get 2 bytes from the kernel's buffer (one for the carriage return)syscall; show user the outputmovrax, 0x2000004; write system callmovrdi, 1; stdoutmovrsi, out_stringmovrdx, out_string_lensyscallmovrax, 0x2000004; write system callmovrdi, 1; stdoutmovrsi, in_charmovrdx, 2; the second byte is to apply the carriage return expected in the stringsyscall; exit system callmovrax, 0x2000001; exit system call        xor     rdi, rdisyscall