ByteDance Terminal Technology
May 11, 2022 · Fundamentals
Common Misconceptions in iOS15 Dynamic Linking and Mach‑O Fixup Chains
This article clarifies three frequent misunderstandings about iOS15+ dynamic linking—namely the encoding of b/bl instructions, the need for rebase/bind in __TEXT segments, and the mismatch between Mach‑O segment VM size and file size—by explaining the underlying ARM64 architecture, PIC concepts, and providing concrete dyld tool examples.
Binary AnalysisDynamic LinkingMach-O
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