Intel DQ77KB SW SMI dumper

gistfile1.py

'''

Extract SW SMI handlers information from
Intel DQ77KB board SMRAM dump.

Example:

$ python smi_handlers.py TSEG.bin
0xcc: 0xd70259d8
0xb8: 0xd706673c
0xba: 0xd706e970
0x05: 0xd706b474
0x04: 0xd706b45c
0x03: 0xd706b2e0
0x01: 0xd706b2dc
0xa1: 0xd70664c4
0xa0: 0xd706636c
0x40: 0xd70254f8

'''
import sys, os, struct

def main():

    path = sys.argv[1]
    data = open(path, 'rb').read()    

    for i in range(len(data)):

        # get range from string
        data_at = lambda offs, size: data[i + offs : i + offs + size]

        #
        # 00: "SMIH"
        # 04: handler address (qword)
        # 0c: SW SMI value (byte)
        #
        if data_at(0, 4) == 'SMIH':

            addr, val = struct.unpack('QB', data_at(4, 8 + 1))

            if val != 0 and addr < 0xffffffff:

                print '0x%.2x: 0x%.8x' % (val, addr)


if __name__ == '__main__':
    
    sys.exit(main())

#
# EoF
#