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#!/usr/bin/env python
# Script to check a bios image and report info on it.
#
# Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
#
# This file may be distributed under the terms of the GNU GPLv3 license.
import sys
import layoutrom
def main():
# Get args
objinfo, rawfile, outfile = sys.argv[1:]
# Read in symbols
objinfofile = open(objinfo, 'rb')
symbols = layoutrom.parseObjDump(objinfofile)[1]
syms = {}
for name, (addr, section) in symbols.items():
syms[name] = addr
# Read in raw file
f = open(rawfile, 'rb')
rawdata = f.read()
f.close()
datasize = len(rawdata)
finalsize = 64*1024
if datasize > 64*1024:
finalsize = 128*1024
# Sanity checks
c16e = syms['code16_end'] + 0xf0000
f16e = syms['final_code16_end']
if c16e != f16e:
print "Error! 16bit code moved during linking (0x%x vs 0x%x)" % (
c16e, f16e)
sys.exit(1)
if datasize > finalsize:
print "Error! Code is too big (0x%x vs 0x%x)" % (
datasize, finalsize)
sys.exit(1)
# Print statistics
sizefree = syms['freespace_end'] - syms['freespace_start']
size16 = syms['code16_end'] - syms['code16_start']
size32 = syms['code32_end'] - syms['code32_start']
totalc = size16+size32
print "16bit size: %d" % size16
print "32bit size: %d" % size32
print "Total size: %d Free space: %d Percent used: %.1f%% (%dKiB rom)" % (
totalc, sizefree + finalsize - datasize
, (totalc / float(finalsize)) * 100.0
, finalsize / 1024)
# Write final file
f = open(outfile, 'wb')
f.write(("\0" * (finalsize - datasize)) + rawdata)
f.close()
if __name__ == '__main__':
main()
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