; Executable name : EATSYSCALL
; Version : 1.0
; Created date : 1/7/2009
; Last update : 1/7/2009
; Author : Jeff Duntemann
; Description : A simple assembly app for Linux, using NASM 2.05,
; demonstrating the use of Linux INT 80H syscalls
; to display text.
;
; Build using these commands:
; nasm -f elf -g -F stabs eatsyscall.asm
; ld -o eatsyscall eatsyscall.o
;
SECTION .data ; Section containing initialized data
EatMsg: db “Eat at Joe’s!“,10 ;报错说这一行有问题
EatLen: equ $-EatMsg
SECTION .bss ; Section containing uninitialized data
SECTION .text ; Section containing code
global _start ; Linker needs this to find the entry point!
_start:
nop ; This no-op keeps gdb happy (see text)
mov eax,4 ; Specify sys_write syscall
mov ebx,1 ; Specify File Descriptor 1: Standard Output
mov ecx,EatMsg ; Pass offset of the message
mov edx,EatLen ; Pass the length of the message
int 80H ; Make syscall to output the text to stdout
mov eax,1 ; Specify Exit syscall
mov ebx,0 ; Return a code of zero
int 80H ; Make syscall to terminate the program
编译结果：
listing5_1.asm:15: error: expression syntax error
谢谢！
