ASM doubt

Hey, I've been playing arround in assembly, and, doing some
experiments, I've come across an issue. How do I pass
and integer to an pointer in ASM?

I've tried:

Code:

MOV [pPlayerClient + 4 * i], -56
MOV DWORD PTR [pPlayerClient + 4 * i], -56
MOV DWORD PTR SS:[pPlayerClient + 4 * i], -56
and so on...

Thanks for any help.

dude what damn english is it ?, i did not understand what do you mean.
integer to pointer ?.

Code:

int addr = 0xABCDEF; mov eax, [ addr ] mov ecx, [ eax ] ; mov [ ecx ], some_shit

Code:

#define MAX_INDEX 25 xor esi, esi _label: mov [ pPlayerClient + esi * 4 ], FFFFFFAAh inc esi cmp esi, MAX_INDEX jnz _label

???

Originally Posted by luizimloko

I was trying to make the walk through walls function in ASM.
What I wanted to do is:

Code:

*(int*)(pPlayerClient + 4 * i) = -56;

MOV doesn't work to do this.

I saw your SuperKill source and tried like that too, but didn't work either.

Indirect access to memory require usage of registers.
try the following:

Code:

MOV EAX, pPlayerClient
MOV ESI, i
MOV DWORD PTR [EAX+ESI*4], -56

Originally Posted by giniyat101

Indirect access to memory require usage of registers.
try the following:

Code:

MOV EAX, pPlayerClient
MOV ESI, i
MOV DWORD PTR [EAX+ESI*4], -56

That's what I was reading about, but modifying the register (ESI, it has values pre-defined)
won't cause any errors? Should I make a backup?

Originally Posted by vaisefud3

That's what I was reading about, but modifying the register (ESI, it has values pre-defined)
won't cause any errors? Should I make a backup?

If you really care about these registers' old values, you can always push them on the stack and restore them later

Code:

PUSH EAX
PUSH ESI
; stuff
POP ESI
POP EAX

Originally Posted by giniyat101

Indirect access to memory require usage of registers.
try the following:

Code:

MOV EAX, pPlayerClient
MOV ESI, i
MOV DWORD PTR [EAX+ESI*4], -56

Reduced FPS to 1 and had no effect at all.

@vaisefud3

now i understood what do you want, this way is more clean.
PS: if you want turn off this feature, you need save the org value (56) into the stack and restore posteriorly, or restore manually.

Code:

#define ADDR_LTCLIENTSHELL 0x0115B4D4 __declspec( noinline ) void WTWAssembly( void ) { char *strCShell = ( char * ) "CShell.dll"; float fWTWValue = -56.0f; __asm { push strCShell call [ GetModuleHandleA ] mov eax, [ eax + ADDR_LTCLIENTSHELL ] mov ecx, [ eax + 70h ] test ecx, ecx jz _return fld [ fWTWValue ] fstp [ ecx + 580h ] fld [ fWTWValue ] fstp [ ecx + 584h ] fld [ fWTWValue ] fstp [ ecx + 588h ] _return: xor eax, eax } }

Originally Posted by luizimloko

Thank you! Just one more question, why the "h" after the offsets?

Originally Posted by vaisefud3

Thank you! Just one more question, why the "h" after the offsets?

Use 'h' to hex value.
'd' to dec value...

@Eoch question answered, please close. Thank You All!
@luizimloko, your source crashes the game.

Originally Posted by vaisefud3

@Eoch question answered, please close. Thank You All!
@luizimloko, your source crashes the game.

if you want use exactly like the SKill source, you should modify the original code for this:

Code:

#define ADDR_LTCLIENTSHELL 0x0115B4D4 __declspec( naked ) DWORD WINAPI WTWAssembly( void * ) { static char *strCShell = ( char * ) "CShell.dll"; static float fWTWValue = -56.0f; __asm { _loop: push strCShell call [ GetModuleHandleA ] test eax, eax jz _return mov eax, [ eax + ADDR_LTCLIENTSHELL ] test eax, eax jz _return mov ecx, [ eax + 70h ] test ecx, ecx jz _return fld [ fWTWValue ] fstp [ ecx + 580h ] fld [ fWTWValue ] fstp [ ecx + 584h ] fld [ fWTWValue ] fstp [ ecx + 588h ] _return: push 6Ah call [ Sleep ] jmp _loop } } BOOL WINAPI DllMain( HMODULE hModule, DWORD dwReason, LPVOID lpReserved ) { if( dwReason == DLL_PROCESS_ATTACH ) CreateThread( 0, 0, &WTWAssembly, 0, 0, 0 ); return 1; }

/closed .

ASM doubt

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