main函数
;15 : {
0x40137a push %ebp
0x40137b mov %esp,%ebp
0x40137d and $0xfffffff0,%esp
0x401380 sub $0x60,%esp
0x401383 call 0x427130 <__main>
;16 : A a;
;17 : a.a = 1;
0x401388 movl $0x1,0x38(%esp)
;18 : a.b = 2;
0x401390 movl $0x2,0x3c(%esp)
;19 : strcpy(a.c, "this is question");
0x401398 lea 0x38(%esp),%eax
0x40139c add $0x8,%eax
0x40139f movl $0x73696874,(%eax)
0x4013a5 movl $0x20736920,0x4(%eax)
0x4013ac movl $0x73657571,0x8(%eax)
0x4013b3 movl $0x6e6f6974,0xc(%eax)
0x4013ba movb $0x0,0x10(%eax)
;20 : printAll(a);
0x4013be mov 0x38(%esp),%eax //下面0x8字节为参数a和参数b
0x4013c2 mov %eax,(%esp)
0x4013c5 mov 0x3c(%esp),%eax
0x4013c9 mov %eax,0x4(%esp)
0x4013cd mov 0x40(%esp),%eax //下面0x20字节为字符数组c有的+没的
0x4013d1 mov %eax,0x8(%esp)
0x4013d5 mov 0x44(%esp),%eax
0x4013d9 mov %eax,0xc(%esp)
0x4013dd mov 0x48(%esp),%eax
0x4013e1 mov %eax,0x10(%esp)
0x4013e5 mov 0x4c(%esp),%eax
0x4013e9 mov %eax,0x14(%esp)
0x4013ed mov 0x50(%esp),%eax
0x4013f1 mov %eax,0x18(%esp)
0x4013f5 mov 0x54(%esp),%eax
0x4013f9 mov %eax,0x1c(%esp)
0x4013fd mov 0x58(%esp),%eax
0x401401 mov %eax,0x20(%esp)
0x401405 mov 0x5c(%esp),%eax
0x401409 mov %eax,0x24(%esp)
0x40140d call 0x401350 <printAll(A)>
;21 : return 0;
0x401412 mov $0x0,%eax
;22 : }
0x401417 leave
0x401418 ret
printAll函数
;11 : void printAll(A a) {
0x401350 push %ebp
0x401351 mov %esp,%ebp
0x401353 sub $0x18,%esp //变量总数据长度为0x18字节
;12 : printf("%d,%d %s\n", a.a, a.b, a.c);
0x401356 mov 0xc(%ebp),%edx //此处edx = 2
0x401359 mov 0x8(%ebp),%eax //此处eax = 1
0x40135c lea 0x10(%ebp),%ecx //此处ecx为字符数组首地址
0x40135f mov %ecx,0xc(%esp)
0x401363 mov %edx,0x8(%esp)
0x401367 mov %eax,0x4(%esp)
0x40136b movl $0x4b9025,(%esp)
0x401372 call 0x4b5890 <printf(char const*, ...)>
;13 : }
0x401377 nop
0x401378 leave
0x401379 ret
原文地址：https://www.cnblogs.com/reverse201/p/10325886.html
时间： 2024-10-16 01:02:56