search for: fileabstraction

...the pointer [5]. As far as I can see, this will invoke UB for an unaligned int64, unless ld64 is built against a different version of OSReadLittleEndian, or unless I’m missing something. [1] https://github.com/apple-opensource/ld64/blob/fd3feabb0a1eb18ab5d7910f3c3a5eed99cef6ab/src/abstraction/MachOFileAbstraction.hpp#L1283-L1304 [2] https://github.com/apple-opensource/ld64/blob/fd3feabb0a1eb18ab5d7910f3c3a5eed99cef6ab/src/abstraction/FileAbstraction.hpp#L137 [3] https://github.com/apple-opensource/ld64/blob/fd3feabb0a1eb18ab5d7910f3c3a5eed99cef6ab/src/abstraction/FileAbstraction.hpp#L96 [4] https://github.c...

As part of our work on LLD for Mach-O, we’ve observed that the object files produced by LLVM don’t always have aligned nlist_64 entries. For context, nlist_64 is the 64-bit symbol table entry structure for Mach-O, and the symbol table is an array of nlist_64 entries. nlist_64 has an 8 byte member, so it should be 8-byte aligned, but we’ve seen object files where the symbol table only has a 4-byte