GDB script to show bits from address

bits.gdbinit

python

def _bits_extend(value, max, min):
    vs = []
    vs.append("")
    for i in range(min, max + 1)[::-1]:
        if (value & (1 << i)) > 0:
            vs.append(" 1")
        else:
            vs.append(" 0")
    vs.append("")
    return "|".join(vs)

def bits(arg0):
    addr, tvalue = gdb.execute('x {}'.format(arg0), to_string=True).rstrip().split("\t")
    value = int(tvalue, 16)
    s = []
    s.append("{}\t{}".format(addr, tvalue))
    s.append("|31|30|29|28|27|26|25|24|23|22|21|20|19|18|17|16|")
    s.append(_bits_extend(value, 31, 16))
    #s.append("")
    s.append("|15|14|13|12|11|10| 9| 8| 7| 6| 5| 4| 3| 2| 1| 0|")
    s.append(_bits_extend(value, 15, 0))
    print("\n".join(s))

end

define xbits
    python bits($arg0)
end

# Shows bits of value as table from specified address
# xt ADDRESS
# ex: xt 0x10000
alias -a xt = xbits