334x-example3.py

count = 0
start = None
# Iterate over the basic blocks in the entry function
for block in entry.low_level_il:
    # Iterate over the basic blocks getting il instructions
    for il in block:
        # We only care about calls
        if il.operation != binaryninja.core.LLIL_CALL:
            continue
    
        # The second call is the call to start
        count += 1
        if count == 2:
            start = bv.get_functions_at(il.operands[0].value)[0]
            break

print "start: {0}".format(start)

# Do the same thing with main, it's the first call in start
main = None
for block in start.low_level_il:
    for il in block:
        if il.operation != binaryninja.core.LLIL_CALL:
            continue

        main = bv.get_functions_at(il.operands[0].value)[0]

print "main: {0}".format(main)