MacroQuest64

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//
// detour 4F77B2 to mymemcheck2
//

int *extern_array = 0x5C26D0;
int __cdecl mymemcheck2(unsigned char *buffer, int count, struct mckey key);

#define first 0x4F7820
#define second 0x4F7858

//        TITLE orig.asm
//        .386P
//
//EXTRN _extern_array:DWORD
//
//_TEXT SEGMENT
//
//getret  PROC NEAR
//        mov         eax,dword ptr [esp]
//        ret
//getret  ENDP
//
//PUBLIC _memcheck2
int __cdecl mymemcheck2(unsigned char *buffer, int count, struct mckey key)
{
    unsigned int x, i, j;
    unsigned int ecx, ebx, edx, eax;

    if (!extern_array) {
    }
//_memcheck2 PROC NEAR
//        push        ebp
//        mov         ebp,esp
//        mov         al,byte ptr [ebp+10h]
//        push        ebx
//        not         al
//        movzx       eax,al
    eax = ~key.a[0] & 0xff;

//        movzx       edx,byte ptr [ebp+11h]
    edx = key.a[1] & 0xff;

//        mov         eax,dword ptr [eax*4+_extern_array]
    eax = extern_array[eax];

//        push        esi
//        mov         esi,0FFFFFFh
//        push        edi
//        xor         eax,esi
    eax ^= 0xffffff;

//        mov         edi,0FFh
//        mov         ecx,eax
//        and         ecx,edi
    ecx = eax & 0xff;

//        xor         ecx,edx
    ecx ^= edx;

//        movzx       edx,byte ptr [ebp+12h]
    edx = key.a[2] & 0xff;
    
//        mov         ecx,dword ptr [ecx*4+_extern_array]
    ecx = extern_array[ecx];

//        sar         eax,8
//        and         eax,esi
    eax = ((int)eax>>8) & 0xffffff;

//        xor         ecx,eax
    ecx ^= eax;

//        mov         eax,ecx
//        and         eax,edi
//        xor         eax,edx
    eax = (ecx & 0xff) ^ edx;

//        movzx       edx,byte ptr [ebp+13h]
    edx = key.a[3] & 0xff;

//        mov         eax,dword ptr [eax*4+_extern_array]
    eax = extern_array[eax];

//        sar         ecx,8
//        and         ecx,esi
    ecx = ((int)ecx>>8) & 0xffffff;

//        xor         eax,ecx
    eax ^= ecx;

//        mov         ecx,eax
//        and         ecx,edi
//        xor         ecx,edx
    ecx = (eax & 0xff) ^ edx;

//        sar         eax,8
    eax = ((int)eax>>8) & 0xffffff;
//        mov         ebx,dword ptr [ecx*4+_extern_array]
//        and         eax,esi
    ebx = extern_array[ecx];

//        xor         ebx,eax
    ebx ^= eax;
    ebx ^= first;
//        call        getret
//        mov         ecx,dword ptr [ebp+0Ch]
//        xor         ebx,eax
//        mov         eax,dword ptr [ebp+8]
//        add         ecx,eax
//        mov         dword ptr [ebp+10h],eax
//        cmp         eax,ecx
    if (count == 0) goto done;
//        jae         done
//myloop:
//        mov         edx,dword ptr [ebp+10h]
//        mov         eax,ebx
//        and         eax,edi
//        movzx       edx,byte ptr [edx]
//        xor         eax,edx
//        sar         ebx,8
//        mov         eax,dword ptr [eax*4+_extern_array]
//        
//        and         ebx,esi
//        xor         ebx,eax
//        inc         dword ptr [ebp+10h]
//        cmp         dword ptr [ebp+10h],ecx
//        jb          myloop
for (i=0;i<(unsigned int)count;i++) {
    unsigned char tmp = buffer[i];
    eax = (int) tmp ^ (ebx & 0xff);
    ebx = ((int)ebx >> 8) & 0xffffff; 
    eax = extern_array[eax];
    ebx ^= eax;
}
//done:
done:
//        call        getret
    eax = second;
    eax ^= ~ebx;
    return eax;
//        not         ebx
//        pop         edi
//        xor         eax,ebx
//        pop         esi
//        pop         ebx
//        pop         ebp
//        ret
//_memcheck2  ENDP 
//_TEXT   ENDS
//END
}

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   //DWORD AARank;             // 108 ~ 10C
   //BYTE Unknown014[36];      // 10C ~ 130
   CHAR Lastname[22];        // 108 ~ 130
} SPAWNINFO, *PSPAWNINFO;

Code: Select all

   BYTE Unknown014[36];      // 108 ~ 10c
   CHAR Lastname[22];        // 10C ~ 130
   DWORD AARank;             // 130 ~ 146
} SPAWNINFO, *PSPAWNINFO;

Code: Select all

   //BYTE Unknown014[36];      // 10C ~ 130 
   CHAR Lastname[22];        // 108 ~ 130 
   DWORD AARank;
} SPAWNINFO, *PSPAWNINFO;