Igor’s Tip of the Week #163: Names list

The Functions list is probably the most known and used part of IDA’s default desktop layout. It includes all detected functions in the current database and offers a quick way to find and navigate to any of them. However, the database consists not only of functions but also data items or instructions which are […]

Igor’s Tip of the Week #161: Extracting substructures

As covered before, the action “Create struct from selection” can be used to quickly create structures from existing data items.  However, Disassembly view not the only place where it can be used. For example, let’s imagine you’ve created a structure to represent some context used by the binary being analyzed: 00000000 Context […]

Igor’s Tip of the Week #160: Hiding casts in the decompiler

In order to faithfully represent the behavior of the code and to conform to the rules of the C language, the decompiler may need to add casts in the pseudocode. A few examples: a variable has been detected to be unsigned but participates in a signed comparison: An argument being passed to a function does not match […]

Igor’s Tip of the Week #159: Where’s my code? The case of not-so-constant data

In order to show the user only the most relevant code and hide the unnecessary clutter, the decompiler performs various optimizations before displaying the pseudocode. Some of these optimizations rely on various assumptions which are usually correct in well-behaved programs. However, in some situations they may be incorrect which may lead to wrong output, so […]

Igor’s Tip of the Week #158: Refreshing pseudocode

When working with the decompiler, you probably spend most of the time in the pseudocode view, since most interactive operations (e.g. renaming, retyping and commenting) can be done right there. IDA is usually smart enough to detect important changes during such actions and update the pseudocode as necessary. However, occasionally you may perform actions […]

Igor’s Tip of the Week #157: Removing function arguments in decompiler

When you need to change the prototype of a function in the decompiler, the standard way is to use the “Set item type…” action (shortcut Y). One case where you may need to do it is to add or remove arguments. Especially in embedded code or when decompiling variadic functions, the decompiler may deduce the argument […]

Igor’s Tip of the Week #154: Synchronized views

When working with a binary in IDA, most of the time you probably use one of the main views: disassembly (IDA View) or decompilation (Pseudocode). If you need to switch between the two, you can use the Tab key – usually it jumps to the the same location in the other view. If you […]