LunaHook-mirror/LunaHook/engine32/Ciel.cpp

#include"Ciel.h"
 
bool CielFilter(LPVOID data, size_t *size, HookParam *)
{
  auto text = reinterpret_cast<LPSTR>(data);
  auto len = reinterpret_cast<size_t *>(size);

  if (*len == 1) return false;

  //StringCharReplacer(text, len, "^n", 2, ' ');

  return true;
}

bool InsertCielHook() 
{
  
    /*
    * Sample games:
    * https://vndb.org/r26480
    * https://vndb.org/v1648
    * https://vndb.org/v10392
    */
  const BYTE bytes[] = {
    0x50,                         // push eax               << hook here
    0xE8, XX4,                    // call FaultA.exe+81032
    0x83, 0xC4, 0x04,             // add esp,04
    0x85, 0xC0,                   // test eax,eax
    0x74, 0x32,                   // je FaultA.exe+41FA6
    0x81, 0x7C, 0x24, 0x10, XX4   // cmp [esp+10],000003FE
  };

  ULONG range = min(processStopAddress - processStartAddress, MAX_REL_ADDR);
  ULONG addr = MemDbg::findBytes(bytes, sizeof(bytes), processStartAddress, processStartAddress + range);
  if (!addr)   return false; 

  HookParam hp;
  hp.address = addr;
  hp.offset=get_reg(regs::edi);
  hp.index = 0;
  hp.type = DATA_INDIRECT;
  hp.filter_fun = CielFilter; 
  
  return NewHook(hp, "Ciel");
}
bool Ciel::attach_function() {
    
    return InsertCielHook();
}