+++ /dev/null
-#!/usr/bin/python3
-##
-## This file is part of the sigrok-util project.
-##
-## Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
-##
-## This program is free software; you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation; either version 3 of the License, or
-## (at your option) any later version.
-##
-## This program is distributed in the hope that it will be useful,
-## but WITHOUT ANY WARRANTY; without even the implied warranty of
-## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-## GNU General Public License for more details.
-##
-## You should have received a copy of the GNU General Public License
-## along with this program; if not, see <http://www.gnu.org/licenses/>.
-##
-
-import sys
-import os
-from getopt import getopt
-import struct
-
-
-def parse(filename):
- f = open(filename, 'rb')
- if f.read(2) != b'MZ':
- raise Exception("MZ signature not found.")
-
- sections = []
- # long e_lfanew
- f.seek(0x3c)
- pe_ptr = struct.unpack("<L", f.read(4))[0]
- f.seek(pe_ptr)
- if f.read(4) != b'\x50\x45\x00\x00':
- raise Exception("PE signature not found.")
- # skip Machine
- f.seek(f.tell() + 2)
- sections.append(['header', 324, 0])
- num_sections = struct.unpack("<H", f.read(2))[0]
- # skip TimeDateStamp
- f.seek(f.tell() + 4)
- symboltable_address = struct.unpack("<L", f.read(4))[0]
- num_symbols = struct.unpack("<L", f.read(4))[0]
- optheader_size = struct.unpack("<H", f.read(2))[0]
- # skip past PE header and PE optional header
- f.seek(f.tell() + 2 + optheader_size)
-
- for i in range(num_sections):
- name = f.read(8).decode('ascii', errors='ignore').strip('\x00')
- # skip past Misc and VirtualAddress
- f.seek(f.tell() + 8)
- # SizeOfRawData
- size = struct.unpack("<L", f.read(4))[0]
- # PointerToRawData
- ptr = struct.unpack("<L", f.read(4))[0]
- # skip to next section header
- f.seek(f.tell() + 16)
- sections.append([name, size, ptr])
-
- symbols = []
- addr = symboltable_address
- stringtable_address = symboltable_address + num_symbols * 18
- for i in range(num_symbols):
- f.seek(addr)
- tmp = f.read(8)
- symaddr = struct.unpack("<L", f.read(4))[0]
- # skip SectionNumber and Type
- symtype = struct.unpack("B", f.read(1))[0]
- f.seek(f.tell() + 4)
- if tmp[:4] == b'\x00\x00\x00\x00':
- # symbol name is in the string table
- straddr = stringtable_address + struct.unpack("<l", tmp[4:])[0]
- f.seek(straddr)
- tmpname = f.read(64)
- name = tmpname[:tmpname.find(b'\x00')]
- else:
- name = tmp
- name = name.decode('ascii', errors='ignore').strip('\x00')
- # need IMAGE_SYM_CLASS_EXTERNAL
- if symtype == 0x02:
- size = 0
- else:
- size = None
- if i != 0 and symbols[-1][2] is not None and symaddr > symbols[-1][1]:
- symbols[-1][2] = symaddr - symbols[-1][1]
- symbols.append([name, symaddr, size])
- addr += 18
-
- f.close()
-
- return sections, symbols
-
-
-def list_all(filename):
- sections, symbols = parse(filename)
- if sections:
- print("Sections:\n Name Size\t Position")
- cnt = 0
- for name, size, address in sections:
- print("%-3d %-8s %5d\t 0x%.8x" % (cnt, name, size, address))
- cnt += 1
- if symbols:
- print("\nSymbol table:\n Address Size Symbol")
- for symbol, address, size in symbols:
- if size is not None:
- sizestr = "%5d" % size
- else:
- sizestr = " "
- print("0x%.8x %s %-8s" % (address, sizestr, symbol))
- print()
-
-
-def extract_symbol(filename, symbol):
- sections, symbols = parse(filename)
- if not symbols:
- return None
- data = None
- for symbolname, address, size in symbols:
- if symbolname == symbol:
- if size is None:
- raise Exception("symbol %s found, but has unknown size")
- f = open(filename, 'rb')
- f.seek(address)
- data = f.read(size)
- f.close()
- if len(data) != size:
- raise Exception("short file")
- break
-
- if data is None:
- raise Exception("symbol %s not found" % symbol)
-
- return data
-
-
-
-def usage():
- print("usage: parsepe.py [-s <symbol>] <-l|-x> <filename>")
- print(" -l list all sections and symbols in file")
- print(" -x extract symbol from file (specify symbol name with -s)")
- sys.exit()
-
-
-#
-# main
-#
-
-if __name__ == '__main__':
- filename = symbol = mode = None
- opts, args = getopt(sys.argv[1:], 's:lx')
- for opt, arg in opts:
- if opt == '-s':
- symbol = arg
- elif opt == '-l':
- mode = 'list'
- elif opt == '-x':
- mode = 'extract'
-
- if len(args) != 1:
- usage()
- if mode is None and symbol is None:
- usage()
-
- try:
- filename = args[0]
- if mode == 'list':
- list_all(filename)
- elif mode == 'extract':
- if symbol is None:
- raise Exception("specify a symbol to extract")
- data = extract_symbol(filename, symbol)
- outfile = os.path.splitext(filename)[0] + symbol
- open(outfile, 'wb').write(data)
- print("saved %d bytes to %s" % (len(data), outfile))
- else:
- raise Exception("specify -l or -x")
- except Exception as e:
- print("Error: %s" % str(e))
-
-
projects / sigrok-util.git / blobdiff