汇编语言内存段

<pre><code class=”lang-bash”>segment .text ;code segment
global_start ;must be declared for linker

_start: ;tell linker entry point
mov edx,len ;message length
mov ecx,msg ;message to write
mov ebx,1 ;file descriptor (stdout)
mov eax,4 ;system call number (sys_write)
int 0x80 ;call kernel

mov eax,1 ;system call number (sys_exit)
int 0x80 ;call kernel

segment .data ;data segment
msg db 'Hello, world!',0xa ;our dear string
len equ $ – msg ;length of our dear string
</code></pre>