An iOS App In Assembly
It's just what it sounds like. Hand written, delicately debugged, well-commented, ARMv7 assembly. Work on this started before ARM64 devices were a thing, so support for them may come in the future.
Rather simple, make an app that compiles, runs, and draws something on the screen, using only hand written assembly. The only times I used the assembly output of clang was to determine the proper
.sections for things, to let lldb be able to debug my functions.
The basic structure of this app is based on my iOS App In Pure C, with a 'main' file which contains all the set-up code, and two supporting files, for each of the classes (AppDelegate, and View).
The drawing code is all done using CoreGraphics, and displays the string 'Hello, Assembly!' in red on the screen. Here's a screenshot of the app running on my iPhone 5S:
If running the app with any accessibility features enabled (switch control, guided access, etc.) the app crashes when the runtime tries to see if my App Delegate responds to the selector
accessibilityInitialize, and I'm not entirely sure why. This may be fixed in the future.
And, as always, the mighty power of Google.
Copyright 2014 Richard J. Ross III.
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