伊韵吧

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http://51test2003.blogbus.com/logs/32869062.html

.data # beginning of our data section 

msg : .ascii      "This function is in AT&T asm file!\n" # string with a carriage- return 

len = . - msg # string length in bytes 

.text # start of the code indicator 

.globl         _print_info_s

_syscall: # declaring a kernel call function 

int             $0x80 # make the system call 

ret # return to the caller 

_print_info_s: # entry point for linker 

# write our string to standard output 

pushl    $len # message length

pushl    $msg # message to write

pushl    $0x1 # file descriptor value 

movl $0x4, %eax # system call number (sys_write) 

call _syscall # call the kernel 

addl $12, %esp # clean the stack 

ret

section     .text ; start of the code indicator 

global _print_info_nasm ; make the main function externally visible 

section .data ; beginning of our data section 

msg db "This function is in Intel nasm file!",0xa ; string with a carriage- return 

len     equ $ - msg ; string length in bytes 

_syscall: ; declaring a kernel call function 

int 0x80 ; make the system call 

ret ; return to the caller 

_print_info_nasm: ; entry point for linker 

; write our string to standard output 

push dword    len ; message length 

push   dword    msg ; message to write 

push   dword    1 ; file descriptor value 

mov    eax,     0x4 ; system call number (sys_write) 

call   _syscall ; call the kernel 

add    esp,     12 ; clean the stack 

ret

 *  asm.h

 *  testss

 *

 *  Created by shijing on 08-12-22.

 *  Copyright 2008 石静. All rights reserved.

 *

 */

int print_info_nasm();

 *  main.c

 *  testss

 *

 *  Created by shijing on 08-12-22.

 *  Copyright 2008 石静. All rights reserved.

 *

 */

#include <stdio.h>

#include "asm.h"

int main()

{

print_info_nasm();

print_info_nasm();

print_info_s();

return 0;

}