如何使用Python 3.1.1獲取dll的目標平臺信息？

Question

我有很多的dll文件，我想將它們選入兩個不同的文件夾（PC和PPC）。 爲此，我需要知道dll文件的目標平臺或任何其他有關其平臺的詳細信息。

我使用Python 3.1.1。我已經嘗試了與此Python版本不兼容的win32api。所以，我嘗試使用ctypes.windll與try-except方法，其中嘗試是真正的加載的DLL是「PC」，如果不是，無法加載「PPC」的DLL。但是，我有這個想法的問題。

有一些dll文件，我知道「PC」DLL但無法加載到內存中。 try-except不適用於他們。所以，我需要從dll文件請求關於它自己的目標平臺的信息。

你對這個問題有什麼想法嗎？

非常感謝。

Answer 1

我找到了一個基於dll文件結構的解決方案。以下是我的代碼部分：

def DLLIdentifier(self): 
    ''' 
    Microsoft Portable Executable and Common Object File Format Specification 
    http://www.microsoft.com/whdc/system/platform/firmware/PECOFF.mspx 

    After the MS DOS stub, at the file offset specified at offset 0x3c, 
    is a 4-byte signature that identifies the file as a PE format image file. 
    This signature is "PE\0\0" (the letters "P" and "E" followed by two null bytes). 
    At the beginning of an object file, or immediately after the signature of an image file, 
    is a standard COFF file header in the following format. 
    Note that the Windows loader limits the number of sections to 96. 
    The Machine field has one of the following values that specifies its CPU type. 
    An image file can be run only on the specified machine or on a system that emulates the specified machine. 
    ''' 
    Platform = 'UNKNOWN' 
    for Row in codecs.open(os.path.join(self.Root, self.File), 'rb'): 
     if b'\x00PE\x00\x00' in Row: 
      # IMAGE_FILE_MACHINE_UNKNOWN  0x0   The contents of this field are assumed to be applicable to any machine type 
      if b'\x00PE\x00\x00\x00\x00' in Row: 
       Platform = 'UNKNOWN' 
       break 
      # IMAGE_FILE_MACHINE_AM33   0x1d3  Matsushita AM33 
      elif b'\x00PE\x00\x00\xD3\x01' in Row: 
       Platform = 'AM33' 
       break 
      # IMAGE_FILE_MACHINE_AMD64  0x8664  x64 
      elif b'\x00PE\x00\x00\x664\x08' in Row: 
       Platform = 'AMD64' 
       break 
      # IMAGE_FILE_MACHINE_ARM   0x1c0  ARM little endian 
      elif b'\x00PE\x00\x00\xC0\x01' in Row: 
       Platform = 'ARM' 
       break 
      # IMAGE_FILE_MACHINE_EBC   0xebc  EFI byte code 
      elif b'\x00PE\x00\x00\xBC\x0E' in Row: 
       Platform = 'EBC' 
       break 
      # IMAGE_FILE_MACHINE_I386   0x14c  Intel 386 or later processors and compatible processors 
      elif b'\x00PE\x00\x00\x4C\x01' in Row: 
       Platform = 'I386' 
       break 
      # IMAGE_FILE_MACHINE_IA64   0x200  Intel Itanium processor family 
      elif b'\x00PE\x00\x00\x00\x02' in Row: 
       Platform = 'IA64' 
       break 
      # IMAGE_FILE_MACHINE_M32R   0x9041  Mitsubishi M32R little endian 
      elif b'\x00PE\x00\x00\x041\x09' in Row: 
       Platform = 'M32R' 
       break 
      # IMAGE_FILE_MACHINE_MIPS16  0x266  MIPS16 
      elif b'\x00PE\x00\x00\x66\x02' in Row: 
       Platform = 'MIPS16' 
       break 
      # IMAGE_FILE_MACHINE_MIPSFPU  0x366  MIPS with FPU 
      elif b'\x00PE\x00\x00\x66\x03' in Row: 
       Platform = 'MIPSFPU' 
       break 
      # IMAGE_FILE_MACHINE_MIPSFPU16 0x466  MIPS16 with FPU 
      elif b'\x00PE\x00\x00\x66\x04' in Row: 
       Platform = 'MIPSFPU16' 
       break 
      # IMAGE_FILE_MACHINE_POWERPC  0x1f0  Power PC little endian 
      elif b'\x00PE\x00\x00\xF0\x01' in Row: 
       Platform = 'POWERPC' 
       break 
      # IMAGE_FILE_MACHINE_POWERPCFP 0x1f1  Power PC with floating point support 
      elif b'\x00PE\x00\x00\xF1\x01' in Row: 
       Platform = 'POWERPCFP' 
       break 
      # IMAGE_FILE_MACHINE_R4000  0x166  MIPS little endian 
      elif b'\x00PE\x00\x00\x66\x01' in Row: 
       Platform = 'R4000' 
       break 
      # IMAGE_FILE_MACHINE_SH3   0x1a2  Hitachi SH3 
      elif b'\x00PE\x00\x00\xA2\x01' in Row: 
       Platform = 'SH3' 
       break 
      # IMAGE_FILE_MACHINE_SH3DSP  0x1a3  Hitachi SH3 DSP 
      elif b'\x00PE\x00\x00\xA3\x01' in Row: 
       Platform = 'SH3DSP' 
       break 
      # IMAGE_FILE_MACHINE_SH4   0x1a6  Hitachi SH4 
      elif b'\x00PE\x00\x00\xA6\x01' in Row: 
       Platform = 'SH4' 
       break 
      # IMAGE_FILE_MACHINE_SH5   0x1a8  Hitachi SH5 
      elif b'\x00PE\x00\x00\xA8\x01' in Row: 
       Platform = 'SH5' 
       break 
      # IMAGE_FILE_MACHINE_THUMB  0x1c2  Thumb 
      elif b'\x00PE\x00\x00\xC2\x01' in Row: 
       Platform = 'THUMB' 
       break 
      # IMAGE_FILE_MACHINE_WCEMIPSV2 0x169  MIPS little - endian WCE v2 
      elif b'\x00PE\x00\x00\x69\x01' in Row: 
       Platform = 'WCEMIPSV2' 
       break 
      else: 
       StartIndex = Row.find(b'\x00PE\x00\x00') 
       EndIndex = StartIndex + 7 
       PlatformCode = Row[StartIndex:EndIndex] 
       self.ErrorState = False 
       self.oLogger.critical('The unknown platform code is "{}".'.format(PlatformCode)) 

    assert Platform != 'UNKNOWN', 'Unknown .dll file "{}" at\n{}'.format(self.File, os.path.join(self.Root, self.File)) 

    if Platform == 'I386': 
     self.PlatformType = 'PC' 
    elif Platform in ('ARM', 'THUMB'): 
     self.PlatformType = 'PPC' 
    else: 
     self.ErrorState = False 
     self.oLogger.critical('The unknown dll file with "{}" platform code.'.format(Platform))