https://github.com/jakeajames/dylibify

Transform any ARM macho executable to a dynamic library
https://github.com/jakeajames/dylibify

Last synced: 15 days ago
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Transform any ARM macho executable to a dynamic library

• Host: GitHub
• URL: https://github.com/jakeajames/dylibify
• Owner: jakeajames
• License: mit
• Created: 2018-07-16T12:51:59.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2022-08-24T11:02:21.000Z (about 2 years ago)
• Last Synced: 2024-07-03T06:32:21.466Z (4 months ago)
• Language: Objective-C
• Size: 20.5 KB
• Stars: 73
• Watchers: 4
• Forks: 21
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.md

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README

        
# dylibify

Transform any ARM macho executable to a dynamic library

# How this works?

It's my really first time playing with Mach-O's like this so don't expect top quality code/explanation, but in a nutshell here's what it does:

- Patch mach header so it is identified as a dylib instead of an executable and add MH_NO_REEXPORTED_DYLIBS flag

- Get rid of PAGEZERO since with it we can't load the dylib

- Add a LC_ID_DYLIB command where PAGEZERO previously was to identify the dylib

- Patch opcodes: Since we got rid of PAGEZERO we have one less segment thus we need to patch whatever is referencing to SEGMENT X to SEGMENT X-1.

- Look into the code comments for more details