Difference between revisions of "Help File:Big endian 2 byte"
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This script will add the 2 byte Big Endian type support to cheat engine. | This script will add the 2 byte Big Endian type support to cheat engine. | ||
Latest revision as of 12:01, 19 March 2017
This script will add the 2 byte Big Endian type support to cheat engine.
alloc(TypeName,256) alloc(ByteSize,4) alloc(ConvertRoutine,1024) alloc(ConvertBackRoutine,1024) TypeName: db '2 Byte Big Endian',0 ByteSize: dd 2 //The convert routine should hold a routine that converts the data to an integer (in eax) //function declared as: stdcall int ConvertRoutine(unsigned char *input); //Note: Keep in mind that this routine can be called by multiple threads at the same time. ConvertRoutine: //jmp dllname.functionname [64-bit] //or manual: //parameters: (64-bit) //rcx=address of input xor eax,eax mov ax,[rcx] //eax now contains the bytes 'input' pointed to xchg ah,al //convert to big endian ret [/64-bit] [32-bit] //jmp dllname.functionname //or manual: //parameters: (32-bit) push ebp mov ebp,esp //[ebp+8]=input //example: mov eax,[ebp+8] //place the address that contains the bytes into eax mov ax,[eax] //place the bytes into eax so it's handled as a normal 4 byte value and eax,ffff //cleanup xchg ah,al //convert to big endian pop ebp ret 4 [/32-bit] //The convert back routine should hold a routine that converts the given integer back to a row of bytes (e.g when the user wats to write a new value) //function declared as: stdcall void ConvertBackRoutine(int i, unsigned char *output); ConvertBackRoutine: //jmp dllname.functionname //or manual: [64-bit] //parameters: (64-bit) //ecx=input //rdx=address of output //example: xchg ch,cl //convert the little endian input into a big endian input mov [rdx],cx //place the integer the 4 bytes pointed to by rdx ret [/64-bit] [32-bit] //parameters: (32-bit) push ebp mov ebp,esp //[ebp+8]=input //[ebp+c]=address of output //example: push eax push ebx mov eax,[ebp+8] //load the value into eax mov ebx,[ebp+c] //load the address into ebx //convert the value to big endian xchg ah,al mov [ebx],ax //write the value into the address pop ebx pop eax pop ebp ret 8 [/32-bit]