Cheat Engine :: View topic - Change code of Internalfor External Pascal ( delphi )

Cheat Engine
The Official Site of Cheat Engine

FAQ

Memberlist

Usergroups

Profile

Change code of Internalfor External Pascal ( delphi )

Cheat Engine Forum Index -> General programming

View previous topic :: View next topic

Author

Message

eloiton
How do I cheat?

Reputation: 0

Joined: 06 May 2021
Posts: 3
Location: Brasil

Posted: Thu Sep 08, 2022 2:03 pm Post subject: Change code of Internalfor External Pascal ( delphi )

Does anyone know how to make this change from DLL to Exe?

This DLL

Code:

procedure HookFunc(NewFunc:Pointer; LocalAddr:DWORD);
var
Old : DWORD;
begin
VirtualProtect(Pointer(LocalAddr), 5, PAGE_EXECUTE_READWRITE, Old);
PBYTE(LocalAddr)^:= $E9;
PDWORD(LocalAddr+1)^:= DWORD(NewFunc) - DWORD(LocalAddr) - 5;
VirtualProtect(Pointer(LocalAddr), 5, Old, Old);
end;

Dark Byte
Site Admin

Reputation: 458

Joined: 09 May 2003
Posts: 25288
Location: The netherlands

Posted: Thu Sep 08, 2022 2:09 pm Post subject:

Code:

procedure HookFunc(processHandle: THandle; NewFunc:Pointer; LocalAddr:DWORD);
var
Old : DWORD;
bytes: array [0..4] of byte;
bw: ptruint;
begin
VirtualProtectEx(processHandle, Pointer(LocalAddr), 5, PAGE_EXECUTE_READWRITE, Old);
bytes[0]:=$e9;
pdword(@bytes[1]]^:=DWORD(NewFunc)-DWORD(LocalAddr)-5;
WriteProcessMemory(processHandle, pointer(LocalAddr), @bytes[0], 5, bw);
VirtualProtectEx(processHandle, Pointer(LocalAddr), 5, Old, Old);
end;

just make sure that newfunc is an address inside the target process, and not inside your EXE.............
_________________

Do not ask me about online cheats. I don't know any and wont help finding them.

Like my help? Join me on Patreon so i can keep helping

eloiton
How do I cheat?

Reputation: 0

Joined: 06 May 2021
Posts: 3
Location: Brasil

Posted: Thu Sep 08, 2022 3:07 pm Post subject:

Dark Byte wrote:

Code:

just make sure that newfunc is an address inside the target process, and not inside your EXE.............

Thank you so much for answering me!
I made some changes the code does the JUMP but does not write after the Jump could you help me?

Code:

procedure code; assembler;
asm
add eax,100 // i want add eax
mov [edi+$000000D8],eax //original code
end;
procedure HookFunc(NewFunc:Pointer; LocalAddr:DWORD);
var
Old : DWORD;
bytes: array [0..4] of byte;
//bw: ptruint;
begin
PID:= GetPidByName('game.exe');
hProc:= OpenProcess(PROCESS_ALL_ACCESS,false,PID);

VirtualProtectEx(hProc, Pointer(LocalAddr), 5, PAGE_EXECUTE_READWRITE, Old);
bytes[0]:=$e9;
pdword(@bytes[1])^:=DWORD(NewFunc)-DWORD(LocalAddr)-5;
WriteProcessMemory(hProc, pointer(LocalAddr), @bytes[0], 5, Written);
VirtualProtectEx(hProc, Pointer(LocalAddr), 5, Old, Old);

end;

eloiton
How do I cheat?

Reputation: 0

Joined: 06 May 2021
Posts: 3
Location: Brasil

Posted: Mon Aug 28, 2023 10:11 am Post subject: Re: Change code of Internalfor External Pascal ( delphi )

eloiton wrote:

Does anyone know how to make this change from DLL to Exe?

This DLL

Code:

after a long time I resolved and understood about this function. I'll leave a part of the solution for anyone who has this same problem.
this code of mine is far from perfect but it will serve as a basis.
and I will post the same code in C# as it is the language I am currently using.

Code:

procedure JMP(quem:dword;aonde:dword);
var
difference, difference2: Integer;
i: Integer;
lpBaseAddress: dword;
dwAddress, dwArgument: DWORD;
instruction: array[0..0] of Byte;
argumentBytes: array[0..3] of Byte;
instructionBytes: array of Byte;
begin

difference := Integer(quem) - Integer(Baseaddress); // Baseaddress is the = module of process
difference2 := Integer(aonde) - Integer(Baseaddress); // Baseaddress is the = module of process
lpBaseAddress := difference;

dwAddress := Cardinal(difference2);
dwArgument := dwAddress - (Cardinal(lpBaseAddress) + 5);

instruction[0] := $E9;
Move(dwArgument, argumentBytes, SizeOf(dwArgument));
setlength(instructionBytes,5);
for i := Low(instruction) to High(instruction) do
instructionBytes[i] := instruction[i];
for i := Low(argumentBytes) to High(argumentBytes) do
instructionBytes[Length(instruction) + i] := argumentBytes[i];
WriteMByteOffse(difference,instructionBytes);

end;

this is the C#

Code:

private static void JMP(IntPtr quem, IntPtr aonde)
{
unchecked
{
int Argument = (int)IntPtr.Subtract(aonde, (int)modBaseP) - ((int)IntPtr.Subtract(quem, (int)modBaseP) + 5);
byte[] instruction = { 0xE9 };
byte[] argumentBytes = BitConverter.GetBytes(Argument);
byte[] instructionBytes = instruction.Concat(argumentBytes).ToArray();
WriteMByte(quem, instructionBytes);
}
}

Display posts from previous:

	Cheat Engine Forum Index -> General programming	All times are GMT - 6 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum