C++反汇编四(SWITCH语句)

004015D0   push        ebp004015D1   mov         ebp,esp004015D3   sub         esp,48h004015D6   push        ebx004015D7   push        esi004015D8   push        edi004015D9   lea         edi,[ebp-48h]004015DC   mov         ecx,12h004015E1   mov         eax,0CCCCCCCCh004015E6   rep stos    dword ptr [edi]// 初始化堆栈49:       int x=5;004015E8   mov         dword ptr [ebp-4],5// 局部变量ebp-4赋值550:       switch (x)51:       {004015EF   mov         eax,dword ptr [ebp-4]004015F2   mov         dword ptr [ebp-8],eax// 拷贝局部变量004015F5   cmp         dword ptr [ebp-8],0// 局部变量和0比较004015F9   je          Grammer_switch+39h (00401609)// 相等则跳向case 0,否则继续和case 1 比较004015FB   cmp         dword ptr [ebp-8],1// 和1比较004015FF   je          Grammer_switch+59h (00401629)// 相等则跳向case 1,否则继续和case 2 比较00401601   cmp         dword ptr [ebp-8],2// 和2比较00401605   je          Grammer_switch+79h (00401649)// 相等则跳向case 2,否则继续和case 3 比较00401607   jmp         Grammer_switch+99h (00401669)// 以上条件都不满足,则跳向default处52:       case 0:53:           {54:               cout<<"x=0"<<endl;00401609   push        offset @ILT+45(std::endl) (00401032)0040160E   push        offset string "x=0" (0043204c)00401613   push        offset std::cout (00439528)00401618   call        @ILT+175(std::operator<<) (004010b4)0040161D   add         esp,800401620   mov         ecx,eax00401622   call        @ILT+125(std::basic_ostream<char,std::char_traits<char> >::operator<<) (00401082)55:           }56:           break;00401627   jmp         Grammer_switch+0B7h (00401687)//跳出switch语句57:       case 1:58:           {59:               cout<<"x=1"<<endl;00401629   push        offset @ILT+45(std::endl) (00401032)0040162E   push        offset string "x=1" (00432048)00401633   push        offset std::cout (00439528)00401638   call        @ILT+175(std::operator<<) (004010b4)0040163D   add         esp,800401640   mov         ecx,eax00401642   call        @ILT+125(std::basic_ostream<char,std::char_traits<char> >::operator<<) (00401082)60:           }61:           break;00401647   jmp         Grammer_switch+0B7h (00401687)//跳出switch语句62:       case 2:63:           {64:               cout<<"x=2"<<endl;00401649   push        offset @ILT+45(std::endl) (00401032)0040164E   push        offset string "x=2" (00432044)00401653   push        offset std::cout (00439528)00401658   call        @ILT+175(std::operator<<) (004010b4)0040165D   add         esp,800401660   mov         ecx,eax00401662   call        @ILT+125(std::basic_ostream<char,std::char_traits<char> >::operator<<) (00401082)65:           }66:           break;00401667   jmp         Grammer_switch+0B7h (00401687)//跳出switch语句67:       default:68:           {69:               cout<<"x未知"<<endl;00401669   push        offset @ILT+45(std::endl) (00401032)0040166E   push        offset string "x\xce\xb4\xd6\xaa" (0043203c)00401673   push        offset std::cout (00439528)00401678   call        @ILT+175(std::operator<<) (004010b4)0040167D   add         esp,800401680   mov         ecx,eax00401682   call        @ILT+125(std::basic_ostream<char,std::char_traits<char> >::operator<<) (00401082)70:           }71:           break;72:       }73:74:   }00401687   pop         edi00401688   pop         esi00401689   pop         ebx0040168A   add         esp,48h0040168D   cmp         ebp,esp0040168F   call        __chkesp (004092e0)00401694   mov         esp,ebp00401696   pop         ebp00401697   ret