Linux 编译汇编

将下面的代码保存为asm.s文件：

 .section .data
data_items:             #These are the data items
 .long 3,67,34,222,45,75,54,34,44,33,22,11,66,0
 .section .text
 .globl _start
_start:
 movl $0, %edi          # move 0 into the index register
 movl data_items(,%edi,4), %eax # load the first byte of data
 movl %eax, %ebx        # since this is the first item, %eax is
                        # the biggest
start_loop:             # start loop
 cmpl $0, %eax          # check to see if we've hit the end
 je loop_exit
 incl %edi              # load next value
 movl data_items(,%edi,4), %eax
 cmpl %ebx, %eax        # compare values
 jle start_loop         # jump to loop beginning if the new
                        # one isn't bigger
 movl %eax, %ebx        # move the value as the largest
 jmp start_loop         # jump to loop beginning
loop_exit:
 # %ebx is the status code for the _exit system call
 # and it already has the maximum number
 movl $1, %eax          #1 is the _exit() syscall
 int $0x80

在Linux终端中编译这段代码：

　　$as asm.s -o asm.o   //编译这段汇编代码

　　$ld asm.o -o asm     //链接编译代码为可执行程序

　　$ ./asm                   //执行程序

如何在Linux查看自己写的程序的汇编代码？

有两种方法：

1、gcc -S temp.c 这样会生成temp.s的汇编文件

2、$ gcc temp.c -g

　  $ objdump -dS a.out