Method PatchLoadedKexts

rEFIt_UEFI/Platform/kext_patcher.cpp:1589–1644

Iterates over kexts loaded by booter and calls PatchKext() for each.

// and calls PatchKext() for each.
//
VOID LOADER_ENTRY::PatchLoadedKexts()
{
  DTEntry             MMEntry;
  _BooterKextFileInfo *KextFileInfo;
  CHAR8               *PropName;
  _DeviceTreeBuffer   *PropEntry;
  CHAR8               SavedValue;
  CHAR8               *InfoPlist;
  OpaqueDTPropertyIterator OPropIter;
  DTPropertyIterator	PropIter = &OPropIter;
  //UINTN               DbgCount = 0;
  
  
  DBG("\nPatchLoadedKexts ... dtRoot = %llx\n", (UINTN)dtRoot);
  
  if (!dtRoot || !dtLength) {
    return;
  }
  
  DTInit(dtRoot, dtLength);
  
  if (!EFI_ERROR(DTLookupEntry(NULL,"/chosen/memory-map", &MMEntry))) {
    if (!EFI_ERROR(DTCreatePropertyIterator(MMEntry, PropIter))) {
      while (!EFI_ERROR(DTIterateProperties(PropIter, &PropName))) {
        //DBG(L"Prop: %s\n", PropName);
        if (AsciiStrStr(PropName,"Driver-")) {
          // PropEntry _DeviceTreeBuffer is the value of Driver-XXXXXX property
          PropEntry = (_DeviceTreeBuffer*)(((UINT8*)PropIter->CurrentProperty) + sizeof(DeviceTreeNodeProperty));
          //if (DbgCount < 3) DBG(L"%s: paddr = %hhX, length = %hhX\n", PropName, PropEntry->paddr, PropEntry->length);
          
          // PropEntry->paddr points to _BooterKextFileInfo
          KextFileInfo = (_BooterKextFileInfo *)(UINTN)PropEntry->paddr;
          
          // Info.plist should be terminated with 0, but will also do it just in case
          InfoPlist = (CHAR8*)(UINTN)KextFileInfo->infoDictPhysAddr;
          SavedValue = InfoPlist[KextFileInfo->infoDictLength];
          InfoPlist[KextFileInfo->infoDictLength] = '\0';
          
          PatchKext(
                    (UINT8*)(UINTN)KextFileInfo->executablePhysAddr,
                    KextFileInfo->executableLength,
                    InfoPlist,
                    KextFileInfo->infoDictLength
                    );

          InfoPlist[KextFileInfo->infoDictLength] = SavedValue;
        }
        //if(AsciiStrStr(PropName,"DriversPackage-")!=0)
        //{
        //    DBG(L"Found %s\n", PropName);
        //    break;
        //}
      }
    }
  }
}

//