deep-rootsfirst principles
deep-roots learning program · module 06

Module 06 — iOS internals

5 chapters · ~15k words · a memory-distrust machine

Every chapter: first principles, What insiders know, a See it yourself lab, connections, and a quiz with worked answers.

01

XNU: the kernel's memory picture

Mach + BSD, tasks and threads, VM maps, 16K pages.

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02

Jetsam & the compressor

No swap: compression or death — the band table and the pressure policy.

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03

Mach ports & XPC

Ports as capabilities, messages with ownership, XPC services.

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04

dyld & the shared cache

Launch closures, chained fixups, the biggest COW artifact you own.

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05

Code signing & PAC

Page-in validation, entitlements, AMFI, authenticated pointers.

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the exam
fin

Module 06 final exam

Every chapter, worked answers behind the fold.

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Part of deep-roots. Prerequisite: Module 01 — memory models. Sources: modules/06-ios-internals.