1. 安裝
sudo apt-get install nasm
這樣nasm就安裝好了,終端輸入命令:
nasm -version
輸出版本信息就說明安裝成功
2. 使用
創建"hello.asm"文件:
touch hello.asm
gedit hello.asm
在文件中輸入下面的匯編代碼
section .data
hello: db 'Hello world!',10 ; 'Hello world!' plus a linefeed character
helloLen: equ $-hello ; Length of the 'Hello world!' string
; (I'll explain soon)
section .text
global _start
_start:
mov eax,4 ; The system call for write (sys_write)
mov ebx,1 ; File descriptor 1 - standard output
mov ecx,hello ; Put the offset of hello in ecx
mov edx,helloLen ; helloLen is a constant, so we don't need to say
; mov edx,[helloLen] to get it's actual value
int 80h ; Call the kernel
mov eax,1 ; The system call for exit (sys_exit)
mov ebx,0 ; Exit with return code of 0 (no error)
int 80h
保存后退出。
編譯
nasm -f elf64 hello.asm
如果是32位系統就把elf64
改為elf32
鏈接
ld -s -o hello hello.o
運行
./hello
終端輸出“Hello,world!”就沒問題了