C常用语句汇编对照表

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函数栈初始化

00B92340  push        ebp  
00B92341  mov         ebp,esp  
00B92343  sub         esp,0E4h  
00B92349  push        ebx  
00B9234A  push        esi  
00B9234B  push        edi  
00B9234C  lea         edi,[ebp-0E4h]  
00B92352  mov         ecx,39h  
00B92357  mov         eax,0CCCCCCCCh  
00B9235C  rep stos    dword ptr es:[edi]
                  rep:执行后边的语句ecx遍
                  stosw:将eax值写入edi指向地址，           
                            edi地址加4

If汇编对照

if (i > 0 && i < 1)
008749B5  cmp      dword ptr [i],0  
008749B9  jle         disifelse+3Ch (08749CCh)  
008749BB  cmp      dword ptr [i],1  
008749BF  jge        disifelse+3Ch (08749CCh)  
{
008749CA  jmp      disifelse+56h (08749E6h)  
}
else if (i > 10)
008749CC  cmp      dword ptr [i],0Ah  
008749D0  jle         disifelse+4Dh (08749DDh)  
{
008749D8  mov       dword ptr [i],eax  
}
else
008749DB  jmp         disifelse+56h (08749E6h)  
{
008749DD  nop        
}
..........................................
CMP 条件
jle <下一个分支>
else if 和 else 开始处都有一个无条件跳转指令，阻止前面的分支结束后直接直接进入此分支

Switch汇编对照

switch (c)
00343D35  mov      eax,dword ptr [c]  
00343D38  mov      dword ptr [ebp-0D0h],eax  
00343D3E  cmp      dword ptr [ebp-0D0h],0  
00343D45  je          diswitch+42h (0343D52h)  
00343D47  cmp      dword ptr [ebp-0D0h],1  
00343D4E  je          diswitch+4Dh (0343D5Dh)  
00343D50  jmp       diswitch+56h (0343D66h)  
{
case 0:
00343D52  nop  
break;
00343D5B  jmp         diswitch+56h (0343D66h)  
case 1:
00343D5D  nop  
break;
default:
break;
}
.....................................................
switch 不用于判断大小，所有都是je，分别跳转到每个case处，最后一个无条件跳转到default处

While循环汇编对照表

while (_sum > 0)
013A3D05  cmp      dword ptr [_sum],0  
013A3D09  jle         diswhile+36h (013A3D16h)  
{
_sum--;
013A3D0B  mov     eax,dword ptr [_sum]  
013A3D0E  sub       eax,1  
013A3D11  mov     dword ptr [_sum],eax  
}
013A3D14  jmp      diswhile+25h (013A3D05h)
.................................
A:CMP <循环变量>,<限制变量>
   JLE <循环外>
   (循环体)

Do-While循环汇编对照

do {
_sum++;
00971AB5  mov        eax,dword ptr [_sum]  
00971AB8  add         eax,1  
00971ABB  mov        dword ptr [_sum],eax  
} while (_sum < 100);
00971ABE  cmp        dword ptr [_sum],64h  
00971AC2  jl             disdo+25h (0971AB5h) 
......................................
(循环体)
CMP <循环变量>,<限制变量>
JL <循环起点>

For循环汇编对照

for (int i = 0; i < 50; i++)
00B91AB5  mov       dword ptr [ebp-14h],0  
00B91ABC  jmp       disfor+37h (0B91AC7h)  
00B91ABE  mov       eax,dword ptr [ebp-14h]  
00B91AC1  add        eax,1  
00B91AC4  mov       dword ptr [ebp-14h],eax  
00B91AC7  cmp       dword ptr [ebp-14h],32h  
00B91ACB  jge         disfor+48h (0B91AD8h)  
{
_sum += i;
00B91ACD  mov        eax,dword ptr [_sum]  
00B91AD0  add         eax,dword ptr [ebp-14h]  
00B91AD3  mov        dword ptr [_sum],eax  
}
00B91AD6  jmp         disfor+2Eh (0B91ABEh)
............................
MOV <循环变量>,<初始值>
JMP B
A:(   修改循环变量)
       ...
B:  CMP <循环变量>,<限制变量>
      jge (跳出循环)
     循环体
     JMP A

C常用语句 汇编对照表

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