Igor’s tip of the week #43: Annotating the decompiler output

Last week we started improving decompilation of a simple function. While you can go quite far with renaming and retyping, some things need more explanation than a simple renamng could provide. Comments When you can’t come up with a good name for a variable or a function, you can add a comment with an explanation or […]

Igor’s tip of the week #40: Decompiler basics

The Hex-Rays decompiler is one of the most powerful add-ons available for IDA. While it’s quite intuitive once you get used to it, it may be non-obvious how to start using it. Basic information As of the time of writing (May 2021), the decompiler is not included with the standard IDA Pro license; some editions of IDA […]

Igor’s tip of the week #18: Decompiler and global cross-references

Previously we’ve covered cross-references in the disassembly view but in fact you can also consult them in the decompiler (pseudocode) view. Local cross-references The most common shortcut (X) works similarly to disassembly: you can use it on labels, variables (local and global), function names, but there are some differences and additions: for local variables, the list of […]

Igor’s tip of the week #08: Batch mode under the hood

We’ve briefly covered batch mode last time but the basic functionality is not always enough so let’s discuss how to customize it. Basic usage To recap, the batch mode can be invoked with this command line: ida -B -Lida.log <other switches> <filename> IDA will load the file, wait for the end of analysis, and write the full disassembly to <filename>.asm How it […]

Tiny microcode optimizer

It is not a surprise to hear the IDA and Decompiler cannot handle all possible cases and eventually fail to recognize a construct, optimize an expression and represent it in its simplest form. It is perfectly understandable — nobody has resources to handle everything. This is why we publish a rich API that can be […]

Hack of the day #1: Decompiling selected functions

Intended audience IDA 7.2 users, who have experience with IDAPython and/or the decompiler. The problem As you may already know, the decompilers allow not only decompiling the current function (shortcut F5) but also all the functions in the database (shortcut Ctrl+F5).A somewhat less-well known feature of the “multiple” decompilation, is that if a range is selected (for example […]

IDA 7.2 – The Mac Rundown

We posted an addendum to the release notes for IDA 7.2: The Mac Rundown. It dives much deeper into the Mac-specific features introduced in 7.2, and should be great reference material for users interested in reversing the latest Apple binaries. It’s packed full of hints, tricks, and workarounds. We hope you will find it quite useful! […]

Decompiling floating point

It is a nice feeling, when, after long debugging nights, your software finally runs and produces meaningful results. Another hallmark is when other users start to use it and obtain useful results. Usually this period is very busy: lots of new bugs are discovered and fixed, unforeseen corner cases are handled. Then another period starts: when users come back for […]