逆向学习笔记

#include <windows.h>
#include <cstdio>

int main()
{
    int a = 1;
    int b = 2;

    wchar_t buf[32];
    wsprintfW(buf, L"%d", a + b);

    MessageBoxW(NULL, buf, L"提示1", 0);
    MessageBoxW(NULL, L"这是第二个消息框", L"提示2", 0);

    return 0;
}

default rel

extern MessageBoxW
extern ExitProcess
extern wsprintfW
global main

section .data

    title1 dw 0x63D0,0x793A,0x0031,0

    text1  dw 0x8FD9,0x662F,0x7B2C,0x4E00,0x4E2A,0x6D88,0x606F,0x6846,0


    title2 dw 0x63D0,0x793A,0x0032,0

    text2  dw 0x8FD9,0x662F,0x7B2C,0x4E8C,0x4E2A,0x6D88,0x606F,0x6846,0

    label1 dd 5
    label2 dd 2

    xixi dd 1

    fmt     dw '%','d',0          
    buf     times 32 dw 0         

section .text
main:
    sub rsp, 40

    xor rcx, rcx
    mov eax ,[label1]
    add eax ,[label2]
    mov [label1],eax
     ; wsprintfW(buf, L"%d", label1)
    lea rcx, [buf]       
    lea rdx, [fmt]        
    mov r8d, eax        
    call wsprintfW

    ; MessageBoxW(NULL, buf, title1, 0)
    xor rcx, rcx
    lea rdx, [buf]
    lea r8,  [title1]
    mov r9d, [xixi] 
    call MessageBoxW

    xor rcx, rcx
    lea rdx, [text2]
    lea r8,  [title2]
    xor r9d, r9d
    call MessageBoxW

    add rsp, 40
    xor ecx, ecx
    call ExitProcess