linux高级程序设计 读书笔记 gcc

在编译源文件时指定"-S"，输出汇编代码到.s文件

gcc -S hello.c 

使用GNU汇编器as来编译源代码hello.s

as -o hello.o hello.s 

[root@localhost kernel]# gcc -S hello.c 
[root@localhost kernel]# ls
hello.c  hello.s
[root@localhost kernel]# cat hello.s 
        .file   "hello.c"
        .section        .rodata
.LC0:
        .string "haha"
        .text
        .globl  main
        .type   main, @function
main:
.LFB0:
        .cfi_startproc
        pushl   %ebp
        .cfi_def_cfa_offset 8
        .cfi_offset 5, -8
        movl    %esp, %ebp
        .cfi_def_cfa_register 5
        andl    $-16, %esp
        subl    $16, %esp
        movl    $.LC0, %eax
        movl    %eax, (%esp)
        call    printf
        movl    $0, %eax
        leave
        .cfi_restore 5
        .cfi_def_cfa 4, 4
        ret
        .cfi_endproc
.LFE0:
        .size   main, .-main
        .ident  "GCC: (GNU) 4.6.3 20120306 (Red Hat 4.6.3-2)"
        .section        .note.GNU-stack,"",@progbits
[root@localhost kernel]# 
[root@localhost kernel]# 
[root@localhost kernel]# 
[root@localhost kernel]# cat hello.c 
#include <stdio.h>
#include <stdlib.h>
int main(){
        printf("haha");
        return 0;
}
[root@localhost kernel]#