Delete old x86 validator.

src/trusted/validator_x86/discmp.py

-#!/usr/bin/python
-# Copyright 2008, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#
-"""discmp.py - compare disassembler output
-
-This script compares output from the Native Client decoder to output
-from GNU objdump to make sure they agree on instruction lengths. It
-returns a zero status on success and non-zero on failure.
-
-
-Usage:
-  discmp.py <ncdis-exe> <test-binary>*
-"""
-
-import logging
-import os
-import re
-import sys
-
-
-def Usage():
-  print("USAGE:  discmp.py <ncdis-exe>  <test-binary>*\n")
-  sys.exit(-1)
-
-class DisFile(object):
-  """Processes variants of disassembler output from various sources,
-   providing a list of instruction lengths, based on addresses."""
-
-  def __init__(self, stream):
-    self.fd = stream
-    self.lastline = None
-    self.lastaddr = None
-    self.thisaddr = None
-    self.thisline = None
-    # note we ignore lines that have only continuation bytes;
-    # no opcode
-    self.dislinefmt = re.compile("\s*([0-9a-f]+):\t(.*\t+.*)")
-    self.data16fmt = re.compile("\s*([0-9a-f]+):\s+66\s+data16")
-    self.waitfmt = re.compile("\s*([0-9a-f]+):\s+9b\s+[f]?wait")
-
-  def NextDisInst(self):
-    while (True):
-      line = self.fd.readline()
-      if line == "": return 0, None
-      match = self.data16fmt.match(line)
-      if (match):
-        addr = match.group(1)
-        line = self.fd.readline()
-        match = self.dislinefmt.match(line)
-        return (int(addr, 16),
-                " " + addr + ":\t60 " + match.group(2) + "\n")
-      match = self.waitfmt.match(line)
-      if (match):
-        addr = match.group(1)
-        line = self.fd.readline()
-        match = self.dislinefmt.match(line)
-        return (int(addr, 16),
-                " " + addr + ":\t9b " + match.group(2) + "\n")
-      match = self.dislinefmt.match(line)
-      if (match):
-        return int(match.group(1), 16), line
-
-  def NextInst(self):
-    if self.lastaddr is None:
-      self.lastaddr, self.lastline = self.NextDisInst()
-    else:
-      self.lastaddr = self.thisaddr
-      self.lastline = self.thisline
-    self.thisaddr, self.thisline = self.NextDisInst()
-    if self.thisline is None:
-      # don't know how long the last line was, so just return 1
-      return (1, self.lastline)
-    if self.lastline is None:
-      return 0, None
-    else:
-      return (self.thisaddr - self.lastaddr, self.lastline)
-
-
-def IsElfBinary(fname):
-  fd = open(fname)
-  iselfbinary = fd.readline().startswith("\x7fELF")
-  fd.close()
-  return iselfbinary
-
-
-def CheckOneFile(fname, ncdis, objdump):
-  logging.info("processing %s", fname)
-  if not IsElfBinary(fname):
-    print("Error:", fname, "is not an ELF binary\nContinuing...")
-    return
-  df1 = DisFile(os.popen(objdump + " -dz " + fname))
-  df2 = DisFile(os.popen(ncdis + " " + fname))
-  instcount = 0
-  while (1):
-    instcount += 1
-    len1, line1 = df1.NextInst()
-    len2, line2 = df2.NextInst()
-    if line1 is None: break
-    if line2 is None: break
-    if (len1 != len2):
-      logging.error("inst length mistmatch %d != %d\n", len1, len2)
-      logging.error(line1)
-      logging.error(line2)
-      sys.exit(-1)
-  if line1 or line2:
-    logging.error("disasm output is different lengths\n")
-    sys.exit(-1)
-  logging.info("%s: %d instructions; 0 errors!\n", fname, instcount)
-
-
-def main(argv):
-  logging.basicConfig(level=logging.DEBUG,
-                      stream=sys.stdout)
-  ncdis = argv[1]
-  logging.info("using ncdis at: %s", ncdis)
-  objdump="objdump"
-  logging.info("using objdump at: %s", objdump)
-  for filename in argv[2:]:
-    if os.path.isdir(filename):
-      logging.info("traversing dir: %s", filename)
-      for dirpath, dirlist, filelist in os.walk(filename):
-        for fname in filelist:
-          CheckOneFile(os.path.join(dirpath, fname), ncdis, objdump)
-    else:
-      CheckOneFile(filename, ncdis, objdump)
-  return 0
-
-if '__main__' == __name__:
-  sys.exit(main(sys.argv))