bdash
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bdash
@bdash.net.nz
74 followers 27 following 15 posts
Pinball, pinball, pinball.

And some computer security nonsense too.
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bdash.net.nz
Crazy thought… what if your decompiled Objective-C code looked like Objective-C code?

Today's journey: implementing an Objective-C “pseudo-language” view for Binary Ninja.

#binaryninja #reverseengineering #objectivec
Before: Decompilation of Objective-C code with minimal language-specific analysis After: Decompiled Objective-C code with language-specific analysis and transformations applied, displayed as pseudo-Objective-C
May 7, 2025 at 11:24 PM
bdash.net.nz
I've been experimenting with improving Binary Ninja's analysis of Objective-C. By hiding reference counting calls and applying types based on [super init] and objc_alloc_init calls, the structure of the decompiled code becomes clearer.

github.com/bdash/bn-obj...

#binaryninja #reverseengineering
Before: decompilation of an Objective-C class initializer showing the results given by Binary Ninja out of the box. Retain / release calls clutter the function and the lifted code that initializes instance variables does not make any sense due to missing type information. After: Decompilation of the same function, but with retain / release calls removed and the type of [super init] propagated to the local variable. As a result, access to instance variables are correctly recognized and field names are displayed. Before: decompilation of an Objective-C function showing the results given by Binary Ninja out of the box. Reference counting function calls clutter the code so much that it’s hard to see the actual structure of the code. After: The same Objective-C function but with reference counting function calls hidden. The structure of the function is clear!
May 5, 2025 at 3:21 PM
bdash.net.nz
"That sign can't stop me because I can't read" – my father-in-law
Pinball machine being lifted by a tractor with forks on the front. The backbox has not been folded down. This is not how you should transport a pinball machine. This is my father-in-law doing things his way because that's how he is.
February 7, 2025 at 6:46 AM
bdash.net.nz
Panoramic photograph of the main tournament area at Pincinnati 2024
December 6, 2024 at 5:22 AM