DATA Segment Pointer Fix

[mwpcheung]

Where can I find the rules for parsing segment section data and fixing pointers?

There are numerous sections within the data segment that require analysis. After many of these sections are loaded into memory, their pointers are fixed. Taking the (DATA, const) section as an example, the exact size of each field is not known in advance, and the sizes of these fields do not follow any specific pattern. Are there any Apple open-source materials that deal with the loading of the entire data segment?

iOS 15.7.2 macho apsd

The following is the apsd file extracted from the iOS 15.7.2 image for the iPhone 6S. IDA has perfectly repaired the (data, const) section, clearly identifying the size of each structure and accurately fixing the pointers within. This seems amazing. Additionally, it marks the bytes that have been patched in the hex view.