Disassmbling with IDA python for extract instruction

Question

I am using IDA Python for extract the instructions of a binary. But unfortunately it does not print some instructions completely. For example, BCC, BCS, BEQ are printed as B. Is there any way to correct this problem? Here is my code!!!

for function_ea in idautils.Functions():
    for ins in idautils.FuncItems(function_ea):
        if idaapi.isCode(idaapi.getFlags(ins)):
            print idc.GetMnem(ins)

score 4 · Answer 1 · answered Oct 05 '17 at 12:02

4

BCC, BCS and BEQ are conditional branch instructions and therefore have same opcode. Everything after the B is the condition code, where:

EQ is equal
CC is carry clear
CS is carry set

See 1 and 2 for more information.

answered Oct 05 '17 at 12:02

crhodes

1,178
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20

re_things · Accepted Answer · 2017-10-06T08:34:49.363

Try something like that (I checked this on my databases for ARM):

import idautils

for function_ea in idautils.Functions():
    for ins in idautils.FuncItems(function_ea):
        if idaapi.isCode(idaapi.getFlags(ins)):
            cmd = idc.GetDisasm(ins)
            mnem = cmd.split(' ')[0]
            print mnem

From IDA manual:

Get instruction mnemonics

ea - linear address of instruction

returns: 0 - no instruction at the specified location

note: this function may not return exactly the same mnemonics as you see on the screen.

So, if you want to see full mnemonic name you should use external dissasembler/plugin or parse disassembly line.

Disassmbling with IDA python for extract instruction

2 Answers2