334x-example6.py

# get_parameter_at takes the architecture, the caller site, a calling 
#  convention (None = cdecl), and a parameter number
canary_frame = main.get_parameter_at(bv.arch, memcmp.address, None, 0)
canary_address = main.get_parameter_at(bv.arch, memcmp.address, None, 1)
canary_width = main.get_parameter_at(bv.arch, memcmp.address, None, 2)
canary = bv.read(canary_address.value, canary_width.value)
print "Canary: {0}".format(canary)