derekselander / dsc_symbols

symbol dumps of iOS shared caches

dsc_symbols

symbol dumps of iOS shared caches

This script will extract the shared cache and make a file tree that matches the images in the dsc.

• Symbols that begin with || mean they are defined (implemented in that module)
• Symbols that begin with __ mean they are undefined and referenced in a different module
• Undefined symbols will include the module its referenced in, defined symbols will include the Mach-o segment/section it's included in

Howto

git clone, then...

List currently available iOS versions to compare

git branch -r

Compare all the new shit in libsystem_c.dylib from iOS 14.0.0 -> 15.7.0

git diff 14.0.0:usr/lib/system/libsystem_c.dylib 15.7.0:usr/lib/system/libsystem_c.dylib

List all modules that were removed between iOS 14.0.0 and iOS 15.7.0

git diff 14.0.0 15.7.0 --diff-filter=D --name-status

List all modules that were created between iOS 14.0.0 and iOS 15.7.0

git diff 14.0.0 15.7.0 --diff-filter=A --name-status

Tip: Get on a branch of interest and use your shell's autocomplete with an existing file in the directory. That way you don't have to type out the fullpath

git switch 14.0.0
git diff  14.0.0 15.7.0  **/libsystem_c.dylib

List all new symbols between iOS 14.0.0 to iOS 15.7.0 in UIKitCore

git diff 14.0.0 15.7.0  **/UIKitCore | grep -E "^\+\|\|"

List all new external references that have been referenced by UIKitCore between iOS 14.0.0 to iOS 15.7.0

git diff 14.0.0 15.7.0  **/UIKitCore | grep -E "^\+__"

List all external references that have been removed UIKitCore between iOS 14.0.0 to iOS 15.7.0

git diff 14.0.0 15.7.0  **/UIKitCore | grep -E "^\+__"

List all new Objective-C classes in UIKitCore between iOS 14.0.0 to iOS 15.7.0

git diff 14.0.0 15.7.0  **/UIKitCore | grep -E "^\+\|\|" | grep OBJC_CLASS_