old_contents: 
  #
  # offsets in struct _IO_FILE
  #
  _IO_FILE = {
      'X86': {
          'size': 148,
          'fd': 0x38,
      },
      'AMD64': {
          'size': 216,
          'fd': 0x70,
      },
  }
new_contents: 
  #
  # offsets in struct _IO_FILE
  #
  _IO_FILE = {
      'MIPS32': {
          'size': 148,
          'fd': 0x38,
      },
      'X86': {
          'size': 148,
          'fd': 0x38,
      },
      'AMD64': {
          'size': 216,
          'fd': 0x70,
      },
  }
  
subject: add mips offset