Fixup chains not properly handled in Mach-O view

[e2r3p13]

Version and Platform:

• Version: Binary Ninja 5.3.8844-dev
• Edition: Commercial
• OS: macOS
• OS Version: Tahoe 26.1 (25B78)
• CPU Architecture: M2 Pro

Bug Description:

For some iOS binaries, dyld_chained_ptr_64_bind pointers (format DYLD_CHAINED_PTR_64) are not properly handled in fixup chains. These are heavily used in the __got section:

Steps To Reproduce:

1. Download this example IPA (should work with other ones).
2. Load the Delta binary it contains with Binary Ninja

Expected Behavior:

Every bind pointer should be bound to its corresponding symbol, by navigating structures of the LC_DYLD_CHAINED_FIXUPS load command.

I suspect symbols are resolved correctly at some point as the following log message appear for every unbound pointer:

[BinaryView.MachoView] Failed to find external symbol "<symbol-name>", couldn't bind symbol at <address>