Function _CreateFileMapping

qiling/os/windows/dlls/kernel32/fileapi.py:693–727

(ql: Qiling, address: int, params)

def _CreateFileMapping(ql: Qiling, address: int, params):
    hFile = params['hFile']
    dwMaximumSizeHigh = params['dwMaximumSizeHigh']
    dwMaximumSizeLow = params['dwMaximumSizeLow']
    lpName = params['lpName']

    hFile = ql.os.utils.as_signed(hFile, ql.arch.bits)
    req_size = (dwMaximumSizeHigh << 32) | dwMaximumSizeLow

    if hFile == INVALID_HANDLE_VALUE:
        fmobj = FileMappingMem()

    else:
        # look for an existing mapping handle with the same name
        if lpName:
            existing_handle = ql.os.handle_manager.search(lpName)

            # if found, return it
            if existing_handle is not None:
                return existing_handle

        fhandle = ql.os.handle_manager.get(hFile)

        # wrap the opened file with an accessor class
        fmobj = FileMappingFile(fhandle.obj)
        fsize = fmobj.get_file_size()

        # if requeted mapping is size is larger than the file size, enlarge it
        if req_size > fsize:
            fmobj.inc_file_size(req_size - fsize)

    fm_handle = Handle(obj=fmobj, name=lpName or None)
    ql.os.handle_manager.append(fm_handle)

    return fm_handle.id

# HANDLE CreateFileMappingA(
#   HANDLE                hFile,