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#! /bin/env python
""" Dump data about a Metrowerks object file.
Based on reverse-engineering the library file format, since the docs are
wrong.
Copyright (C) 1997 Chris Herborth (chrish@qnx.com)
"""
# ----------------------------------------------------------------------
# Standard modules
import sys, getopt, string, time
# ----------------------------------------------------------------------
# Extra goodies
from dumpar import mk_long, str2hex, print_offset, get_string
# ----------------------------------------------------------------------
def mk_short( str ):
""" convert a 2-byte string into a number
Assumes big-endian!
"""
if len( str ) < 2:
raise ValueError, "str must be 2 bytes long"
num = ord( str[1] )
num = num + ord( str[0] ) * 0x100
return num
# ----------------------------------------------------------------------
def usage():
""" Display a usage message and exit.
"""
print "dumpo [-v] object1 [object2 ... objectn]"
print
print "Attempt to display some useful information about the contents"
print "of the given Metrowerks object file(s)."
print
print "-v Be verbose (displays offsets along with the data)"
raise SystemExit
# ----------------------------------------------------------------------
def dump_o( file, verbose ):
""" dump information about a Metrowerks object file
Note that there is more info there, 6 more quads before the file name.
"""
offset = 0
print "Dumping object:", file
# Attempt to read the data.
try:
data = open( file ).read()
except IOError, retval:
print "*** Unable to open file %s: %s" % ( file, retval[1] )
return
# Check the magic number.
if verbose:
print_offset( offset )
print "Magic:",
magic = data[offset:offset + 8]
print "'%s'" % ( magic )
if magic != "MWOBPPC ":
print "*** Invalid magic number!"
return
offset = offset + 8
# version
if verbose:
print_offset( offset )
print "version:", mk_long( data[offset:offset + 4] )
offset = offset + 4
# flags
if verbose:
print_offset( offset )
print "flags:", str2hex( data[offset:offset + 4] )
offset = offset + 4
# code size
if verbose:
print_offset( offset )
print "code size:", mk_long( data[offset:offset + 4] )
offset = offset + 4
# data size
if verbose:
print_offset( offset )
print "data size:", mk_long( data[offset:offset + 4] )
offset = offset + 4
# ----------------------------------------------------------------------
def main():
""" mainline
"""
# Set up some defaults
be_verbose = 0
# First, check the command-line arguments
try:
opt, args = getopt.getopt( sys.argv[1:], "vh?" )
except getopt.error:
print "*** Error parsing command-line options!"
usage()
for o in opt:
if o[0] == "-h" or o[0] == "-?":
usage()
elif o[0] == "-v":
be_verbose = 1
else:
print "*** Unknown command-line option!"
usage()
# Now we can attempt to dump info about the arguments.
for obj in args:
dump_o( obj, be_verbose )
if __name__ == "__main__":
main()
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