gistfile1.c

http://en.wikibooks.org/wiki/X86_Assembly/GAS_Syntax

mark@linux-qmbm ~$ cat hello.c
#include <stdio.h>

int main(void) {
  printf("Hello, world!\n");
  return 0;
}

mark@linux-qmbm ~$ gcc -o hello hello.c
mark@linux-qmbm ~$ ./hello
Hello, world!
mark@linux-qmbm ~$ gcc -S -m32 hello.c
mark@linux-qmbm ~$ wc -l hello.s
22 hello.s
mark@linux-qmbm ~$ cat hello.s
        .file   "hello.c"
        .section        .rodata
.LC0:
        .string "Hello, world!"
        .text
.globl main
        .type   main, @function
main:
        pushl   %ebp
        movl    %esp, %ebp
        andl    $-16, %esp
        subl    $16, %esp
        movl    $.LC0, (%esp)
        call    puts
        movl    $0, %eax
        leave
        ret
        .size   main, .-main
        .ident  "GCC: (SUSE Linux) 4.5.0 20100604 [gcc-4_5-branch revision 160292]"
        .section        .comment.SUSE.OPTs,"MS",@progbits,1
        .string "ospwg"
        .section        .note.GNU-stack,"",@progbits