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 

[code="java"]
# gcc -S hello.c
# ls
hello.c hello.s
# 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
#
#
#
# cat hello.c
#include <stdio.h>
#include <stdlib.h>
int main(){
printf("haha");
return 0;
}
# [/code]