Using IDA Python Iterate Through All Functions and Their Instructions

Question

I'm new to IDAPython. Basically I want to iterate through all functions in an IDB file and their instructions using ida python script. The final goal is to export the functions & their instructions from idapro. in certain format.

from idautils import *
from idaapi import *

ea = BeginEA()
for funcea in Functions(SegStart(ea), SegEnd(ea)):
    functionName = GetFunctionName(funcea)
    print functionName

Using above script I'm retrieving function names, now I also want to print the assembly instructions of each function. I know may I have to use GetDisasm(ea), not sure how to use the API.

TIA

Answer 1

Please note that it will print only those functions that were recognized as such by IDA autoanalysis or defined manually, exactly as your code snippet. This snippet is not debugged, use on your own risk.

from idautils import *
from idaapi import *
from idc import *

for segea in Segments():
    for funcea in Functions(segea, SegEnd(segea)):
        functionName = GetFunctionName(funcea)
        for (startea, endea) in Chunks(funcea):
            for head in Heads(startea, endea):
                print functionName, ":", "0x%08x"%(head), ":", GetDisasm(head)

If you want to extract the instructions as binary you can use idc.NextHead function to get instruction boundaries.

The function chunks mentioned in the code are not the same as we see in the the graph view in IDA (the function has more than one chunk if it is discontinuous ): chunks in graph view are called "basic blocks", see more correct definition by the link.