释放动态内存

:00657B8D 90                      nop
:00657B8E 90                      nop
:00657B8F 90                      nop
:00657B90 83EC0C                  sub esp, 0000000C // 分配12字节局部变量
:00657B93 56                      push esi
:00657B94 68D0CB9100              push 0091CBD0 // 临界区对象* Reference To: KERNEL32.EnterCriticalSection, Ord:008Bh
                                  |
:00657B99 FF1504228500            Call dword ptr [00852204] // 进入临界区
:00657B9F 8B742414                mov esi, dword ptr [esp+14] 
:00657BA3 8B06                    mov eax, dword ptr [esi]
:00657BA5 83C604                  add esi, 00000004
:00657BA8 85C0                    test eax, eax 
:00657BAA 0F8EA2000000            jle 00657C52 
:00657BB0 53                      push ebx
:00657BB1 55                      push ebp
:00657BB2 57                      push edi
:00657BB3 89442420                mov dword ptr [esp+20], eax * Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:00657C49(C)
|
:00657BB7 8B2E                    mov ebp, dword ptr [esi] 
:00657BB9 8B5E04                  mov ebx, dword ptr [esi+04] // 本次动态代码长度
:00657BBC 83C604                  add esi, 00000004
:00657BBF C1E505                  shl ebp, 05 
:00657BC2 81C5E8CB9100            add ebp, 0091CBE8 
:00657BC8 83C604                  add esi, 00000004
:00657BCB 89742410                mov dword ptr [esp+10], esi 
:00657BCF 03F3                    add esi, ebx
:00657BD1 8B4500                  mov eax, dword ptr [ebp+00] // 得到上一次动态检测代码的地址
:00657BD4 89742414                mov dword ptr [esp+14], esi
:00657BD8 50                      push eax* Reference To: MSVCRT.free, Ord:025Eh
                                  |
:00657BD9 FF15FC238500            Call dword ptr [008523FC] // 释放上一次的动态代码内存空间
:00657BDF 83C404                  add esp, 00000004
:00657BE2 B908000000              mov ecx, 00000008
:00657BE7 33C0                    xor eax, eax
:00657BE9 8BFD                    mov edi, ebp
:00657BEB 85DB                    test ebx, ebx
:00657BED F3                      repz    
:00657BEE AB                      stosd
:00657BEF 7E4F                    jle 00657C40
:00657BF1 53                      push ebx // 动态代码长度* Reference To: MSVCRT.malloc, Ord:0291h
                                  |
:00657BF2 FF1540248500            Call dword ptr [00852440]  
:00657BF8 83C404                  add esp, 00000004
:00657BFB 894500                  mov dword ptr [ebp+00], eax 
:00657BFE 85C0                    test eax, eax 
:00657C00 743E                    je 00657C40
:00657C02 8B742410                mov esi, dword ptr [esp+10]  
:00657C06 8BCB                    mov ecx, ebx
:00657C08 8BD1                    mov edx, ecx
:00657C0A 8BF8                    mov edi, eax
:00657C0C C1E902                  shr ecx, 02 
:00657C0F F3                      repz  
:00657C10 A5                      movsd
:00657C11 8BCA                    mov ecx, edx
:00657C13 8D442418                lea eax, dword ptr [esp+18]
:00657C17 83E103                  and ecx, 00000003
:00657C1A 50                      push eax
:00657C1B F3                      repz 
:00657C1C A4                      movsb
:00657C1D 8B4D00                  mov ecx, dword ptr [ebp+00]
:00657C20 6A40                    push 00000040
:00657C22 53                      push ebx
:00657C23 51                      push ecx* Reference To: KERNEL32.VirtualProtect, Ord:035Bh
                                  |
:00657C24 FF15A0218500            Call dword ptr [008521A0] // 把动态代码的内存页属性设置为PAGE_EXECUTE_READWRITE
:00657C2A 8B5500                  mov edx, dword ptr [ebp+00]
:00657C2D 53                      push ebx
:00657C2E 52                      push edx* Reference To: KERNEL32.GetCurrentProcess, Ord:012Fh
                                  |
:00657C2F FF15FC218500            Call dword ptr [008521FC]
:00657C35 50                      push eax* Reference To: KERNEL32.FlushInstructionCache, Ord:00DCh
                                  |
:00657C36 FF1540218500            Call dword ptr [00852140] // 刷新CPU指令缓存
:00657C3C 8B742414                mov esi, dword ptr [esp+14]* Referenced by a (U)nconditional or (C)onditional Jump at Addresses:
|:00657BEF(C), :00657C00(C)
|
:00657C40 8B442420                mov eax, dword ptr [esp+20]
:00657C44 48                      dec eax
:00657C45 89442420                mov dword ptr [esp+20], eax
:00657C49 0F8568FFFFFF            jne 00657BB7
:00657C4F 5F                      pop edi
:00657C50 5D                      pop ebp
:00657C51 5B                      pop ebx* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:00657BAA(C)
|
:00657C52 68D0CB9100              push 0091CBD0* Reference To: KERNEL32.LeaveCriticalSection, Ord:022Dh
                                  |
:00657C57 FF15F8218500            Call dword ptr [008521F8]
:00657C5D 5E                      pop esi
:00657C5E 83C40C                  add esp, 0000000C
:00657C61 C20400                  ret 0004
这段代码会不定期执行，希望如果要执行的时候就直接释放掉，不让它执行，不知道有没有办法做到？
PS..那个分给少了