Questions tagged [decompiler]
Software used to revert the process of compilation. Decompiler takes a binary program file as input and output the same program expressed in a structured higher-level language.
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questions
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1answer
97 views
Stack-pointer analysis failed
I'm testing my toy obfuscating C compiler against IDA's decompiler, but IDA refuses always functions (then the decompilation is not possible). For example, at one of lowest-levels of obfuscating, a ...
0
votes
0answers
46 views
Hex-Ray Decompiler: inline function not recognized
While trying to decompile an application with Hex-Ray 7.0, I stumbled upon the problem that in nearly all cases, what seems to be a certain inline function will not be recognised, which bloats the ...
0
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1answer
27 views
IDA Pro: __GETDS breaks decompiler output
when trying to decompile some interrupt service routines done with Watcom, the __GETDS call at the beginning of the functions will break the decompiler output completely.
Here's the disassembly:
And ...
1
vote
2answers
80 views
Can I decompile a file if I have a compiler? [closed]
Is it possible to reverse the compiled code using a compiler?
I have a compiler in the form of exe and using it I can compile the file. But there is no possible instruction I got to decompile a file.
...
1
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1answer
77 views
Is there a way to show exceptions handlers in Hex-Rays decompiler output?
Is there a way to show these exception handlers in the decompiled code?
I can't tell that a block is in a __try block without looking into the disassembly.
__int64 __fastcall ...
0
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0answers
31 views
Generate pseudo code not available for some binaries in IDA Pro
I'm using IDA Pro to disassemble binaries. For some binaries, the Generate Pseudo Code option is available and works fine. However, on other binaries (using possibly a different compiler toolchain) ...
2
votes
2answers
271 views
Template code with 0xcccccccc in every ghidra decompiled function for some executables
I often have some code like this on the beginning of every function of a decompiled program:
iVar1 = 0x42;
puVar2 = local_10c;
while (iVar1 != 0) {
iVar1 = iVar1 + -1;
*puVar2 = ...
2
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0answers
147 views
IDA Hex-Rays Decompiler Generates ASM Code Issue
For a long time now, I've been struggling with some functions generated with IDA HexRays plugin that seem to be corrupted.
Some of the decompiled generated plain C code, show as ASM code :/
i.e:
...
0
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1answer
107 views
Is it possible to recover the key to a decrypted file?
Is it possible to recover the key to a decrypted file if you have the initialization vector and it uses RijndaelManaged? If so how?
The file I want to recover the key from is a xml that looks like ...
2
votes
1answer
865 views
NSA Ghidra 9 - Is the decompiler open source?
I recently downloaded Ghidra (link) ver 9 on windows.
The decompiler feature is presumable found at
<GHIDRA_HOME>\Ghidra\Features\Decompiler
There is a lib folder containing the Java code. ...
0
votes
1answer
153 views
Is there any decompiler, which can produce a compilable result?
I would like to decompile a 32bit linux executable to C, modify some parts of it, and then compile it back. I do not care if the C code is not pretty and really hard to maintain. The only thing I care ...
2
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2answers
415 views
Is PNF's JEB Reverse Engineering platform written in pure Java?
I have seen the JEB decompiler by PNF Software morph from a specialised decompiler to a full fledged reverse engineering platform like Capstone or IDA Pro.
While examining the earlier versions of JEB,...
6
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2answers
4k views
Decompile Python for ELF Binaries
There are several solutions available to extract Pyc files from Windows binaries and then decompile them using uncompyle2 or uncompyle6.
However, I have a Linux ELF 64-bit binary which was compiled ...
3
votes
2answers
324 views
What's a decompiler that can be extended to new architecture, and how can I do it?
I was reverse engineering a binary file. Details does not matter. The important part is that it is written in an architecture that is very unpopular, and there is no existing disassembler or ...
5
votes
4answers
1k views
Can AI be used to write better decompilers/disassemblers? [closed]
In the past for years I used some disassembler and tried some decompiler, nowadays there's so much talking and stuff about deep learning and AI, I wonder if some can be used with those tasks (given ...
6
votes
2answers
664 views
Split variable in Hexrays decompiler?
With Microsoft Visual C++ executables, I often run into decompilations like this:
void __cdecl Pbdf::ReadString(char *dst, Pbdf *pbdfOrLength)
{
Pbdf *pbdf; // esi
pbdf = pbdfOrLength;
...
1
vote
1answer
250 views
Tools to translate x86-64 ELF to PPC (or i386 decompilation)
I've been working on a project on an IBM POWER8 system. I'd like to translate some very simple binaries from x86-64 to PPC.
Is there a tool that can either:
Translate the binary from x86-64 to PPC (...
1
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2answers
2k views
Decompile lua from Unity Games
I discovered that a Unity games have lua scripts. I tried to decompile lua using some tools but they are not working with lua from Unity Games. The header doesn't look the same so they seems encrypted....
1
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1answer
1k views
IDA hex-rays decompiler not loaded
I have an executable that is c++(x64) compiled code upon which the decompiler is not loaded. In other files, it works fine. But they are mostly written in c.
I am not sure if it is a limitation in ...
1
vote
1answer
33k views
Can we decompile an .exe or .dll as %100? [closed]
Can we decompile a .exe or .dll file as 100%? Also sometimes seems some
mistakes on somewhere (like mainfrm.cs) , how can we fix that?
What is the best .NET decompiler? or What would you prefer?
I ...
0
votes
1answer
5k views
Why is IDA call analysis failing?
I am trying to reverse an ELF (C++) binary using IDA v6.95. Decompiler complains that the call analysis is failing. I am attaching the IDB database. What can I do to fix the IDB?
0
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1answer
179 views
How can i rename Array to API Name in IDAPro?
I am studying to analysis malware..
While to analysis a malware using IDA, I want to rename array to API Name.
To Help your understanding, attached image.
Please help.
Thank you
7
votes
1answer
6k views
What is a good and reliable C decompiler that support ELF and SH4 Architecture?
I have a ELF file, which is a partial firmware of a navigation module(my BMW idrive CCC), I need to decompile the elf file.
I tried Reko Decompiler which said it does not support SH4 and Snowman ...
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1answer
2k views
2
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1answer
2k views
Decompiling 64bit ARMv8 Android .so library
I know IDA Pro can disassemble them to assembly code, but are there tools to decompile 64bit ARMv8 Android .so shared libraries to C?
0
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0answers
389 views
Why is IDAPython decompiler API returning the same effective address for both the current item and its parent?
Following this blog post, I am writing an IDAPython code to traverse the AST generated by the decompiler in order to extract some information. I am providing both my AST, the Python code and the ...
1
vote
2answers
402 views
How to programatically extract function names, function arguments and strings from a .NET binary?
My goal is to
extract function names,
the libraries they come from (if the functions were imported),
function arguments, and
strings
from a .NET binary. How can I do this?
Is this possible using ...
2
votes
2answers
836 views
Are there IDA scripts/plugins to translate/comment instructions to/with pseudocode?
I'm not asking for a decompiler, as I'm aware that it does not produce accurate results all the time. I've tried Googling but all I found were decompilers.
Problem
I found it extremely inefficient ...
1
vote
1answer
236 views
IDA Hex-Rays Generating Redundant Code
Hex-Rays generated C code is adding a lot of redundancy code, and I cannot figure out why and it really frustrates me to remove them manually on my reverse engineering process.
if ( v1 )
{
v15....
4
votes
6answers
8k views
Are there any interactive decompilers besides HexRays?
Are there any decompilers that generate pseudo-code that is interactive? By interactive, I mean you can select a variable and rename it. Or you can select a function call and rename the function. Or ...
4
votes
3answers
11k views
Edit codes in .Net Reflector with Reflexil (Compile Window)
I'm Using .Net Reflector with Reflexil to edit or view .net Assembly codes.
I see this picture in reflexil.net:
It Shows the "Compile" window.
How can I see this window and edit codes?
1
vote
1answer
110 views
Recognize certain components in the compiler produced assembly program
Here is my question:
given a marked C code component, how I can find its corresponding assembly instructions in the compiler produced assembly program?
It should be very easy if the marked component ...
1
vote
1answer
634 views
Pointer arithmetic in C generated by ida / hexrays decompiler
Please help me understand the following function lines. The loop body does some floating point arithmetic, but why does it cast float pointers to char *, and back?
if ( CG.blockLength >= 4 )
{
...
2
votes
3answers
2k views
IDA decompiler macro
What is the purpose of COERCE_FLOAT and COERCE_UNSIGNED_INT macros in the Hex Rays decompiled code below?
double __cdecl sub_401580(float a1)
{
unsigned int v1; // eax@1
double v2; // st7@1
...
-3
votes
1answer
328 views
What are the risks of running a decompiler? [closed]
I have a binary file which is potentially a virus and I wish to look into its internals. I need to be cautious as I don't want it to run on my system. That's why I ruled out gdb.
I've searched and ...
5
votes
3answers
1k views
Hash algorithm written in C decompiled with IDA
I have been working on rewriting a program, although it uses a hash to fingerprint the file, I have used IDA to find the function doing the hash and what it is doing to the file before it sends it to ...
2
votes
1answer
4k views
What does __PAIR__ mean in Hex-Rays decompiler output? [duplicate]
what does this code on IDA? i've found with this a couple of times and i don't have idea what means.
int a5;
int dGainMax;
COERCE_DOUBLE(__PAIR__(a5, dGainMax))
0
votes
1answer
1k views
Is it possible to decompile an executable into Visual Basic source code when you do not know what language the program was written in?
I need to decompile an executable file into its source code and put the source code together again in such a way that it can be recompiled and work as it should. The only issue that I have with this ...
1
vote
0answers
538 views
IDA Pro not showing structures, even when they're defined
I have this kind of code:
I have reversed the struct entirely, and when I try to cast to ClientGame*, instead of:
if(mainStruct->something & 2)
I see:
The offsets 0x364, 0x370, and 0x374 ...
4
votes
1answer
617 views
Can EiNSTeiN “ida-decompiler” be linked into The IDA Free version?
Is it possible to change the configuration of IDA Free so that Python may be
linked into it to allow Python plugins to be used also?
And, does anyone know if the EiNSTeiN ida-decompiler works under ...
8
votes
1answer
3k views
Understanding __PAIR__ macro from IDA PRO Pseudo Decompiler to look better
When I decompile using IDA PRO I get code which could look like both of these
Understanding the __PAIR__ macro.
Macro itself.
// The following definition is not quite correct because it always ...
9
votes
5answers
8k views
Decompilation techniques for DOS .COM files
I've found a binary copy of a DOS freeware game I was fond of back in the day (Firefighter, downloadable as FIRE.COM) but the source code is not available. I'd like to re-implement it in C or Python ...
3
votes
2answers
17k views
64 bit Pseudocode decompiler
I have a 64 bit program im debugging.
I found the function i need to learn more about to potentially "fix" the problem (there is no source code available for the program).
To speed things up, i ...
6
votes
3answers
12k views
Is it possible to convert MIPS ASM to code?
IDA can disassemble to assembly. But, reading large assembly blocks with byte shifts, etc, is tedious work. I rather would read pseudo-code.
Are there any documents, tutorials or tools for this work ...
10
votes
1answer
744 views
Hex-Rays Decompiler: Buffer on the stack
I am currently reversing a windows driver in order to write a Linux compatible driver for a DVB card, but I have come up against a small issue that I can work around, but if it is possible I would ...
7
votes
1answer
1k views
How do you optimise AST's or convert them to a real language
I have been interested in automatic vulnerability assessment and decompilation of code for a while now. And as a result I have been building parsers in Python that reads a bin, disassembles it ...
6
votes
2answers
531 views
Is there a way to recover macros from compiled code?
I've been thinking of reversing some firmware I have laying around. One characteristic of the firmware is that it is compiled using lots of pre-processor macros. Now, as I understand it, these are not ...
5
votes
4answers
16k views
Is there any tool for decompiling raw binary files to C code for the Motorola 68000 processor series?
I have the ROM dump (.bin files) targeted for the MC68008 processor. Need to convert them into a high level source code. I have already found tools for disassmbling them into assembly code. The next ...
3
votes
2answers
12k views
Why my Resource Hacker doesn't work with some .EXE files
I use Resource Hacker Application for Reverse Engineering purposes, I've cracked 3 softwares by using this software, but it doesn't grab all .EXE, .DLL files.
sometimes It says, This is not a valid ...
9
votes
1answer
2k views
Common Lisp bytecode or machine code decompiler
Does anyone know of a decompiler for Common Lisp?
I know most lisp environments include a disassembler. But I don't know of any decompilers.
I would think it should be possible to make a decompiler ...
