alexzielenski / optool Goto Github PK

The precompiled binary for optool does not run on Lion (10.7.5). It just crashes.
Nor am I able to build optool from source on Lion.
(see https://trac.macports.org/ticket/62276)

Is there any easy fix?

Hi alexzielenski,
Thank you. I've used it in many projects. It's very great.
Recently I found a problem, when I uninstall a dylib using optool. and then reinject another dylib using yololib (https://github.com/KJCracks/yololib). but It seems wrong. I am not sure whether it is a defect of optool or a defect of yololib. Can you help me? Please see the attachment.

who can help me!!! thanks

I'm trying to use optool with patchapp.sh to inject my theos tweak into an .ipa file. However, I can't figure out how to build the xcodeproj or find any way to get the optool binary, help would be appreciated.

Hi, I cloned the repo, but it didn't bring with it its submodule.

So, naturally, I tried
git submodule init
git submodule update

and it failed because I didn't have "access rights" to the submodule.

Above this - you set your Xcode project "Base SDK" to 10.9, which no longer exists in recent Xcode releases (Xcode 6.4, Xcode 7.x)

Can you please verify your repository is still usable?

I injected a few more dyibs and entered here. How can I solve this problem? Is there control that can't inject too much dylib?

Hello! I'm trying to uninstall system lib:
optool uninstall -p "/usr/lib/libsqlite3.dylib" -t "$TARGET_APP_PATH/$APP_BINARY"
All looks like fine, see before and after otool -l output
before.txt
after.txt

But I'm getting an error in runtime about another lib:

dyld: Symbol not found: OBJC_CLASS$_NSFileManager
Referenced from: /var/containers/Bundle/Application/7AFFEF62-62B4-4C44-BF78-4E20467B31AF/IPAPatch-DummyApp.app/Wrapping Test
Expected in: /usr/lib/libobjc.A.dylib
in /var/containers/Bundle/Application/7AFFEF62-62B4-4C44-BF78-4E20467B31AF/IPAPatch-DummyApp.app/Wrapping Test

Can I do something with that?

git -c diff.mnemonicprefix=false -c core.quotepath=false -c credential.helper=sourcetree fetch origin
git -c diff.mnemonicprefix=false -c core.quotepath=false -c credential.helper=sourcetree pull origin master
From https://github.com/alexzielenski/optool

• branch master -> FETCH_HEAD
  Already up-to-date.

git -c diff.mnemonicprefix=false -c core.quotepath=false -c credential.helper=sourcetree submodule update --init --recursive
Cloning into 'optool/FSArgumentParser'...
warning: templates not found /usr/local/git/share/git-core/templates
Permission denied (publickey).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
Clone of '[email protected]:NSError/ArgumentParser.git' into submodule path 'optool/FSArgumentParser' failed
Cloning into 'optool/FSArgumentParser'...
warning: templates not found /usr/local/git/share/git-core/templates
Permission denied (publickey).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
Clone of '[email protected]:NSError/ArgumentParser.git' into submodule path 'optool/FSArgumentParser' failed
Cloning into 'optool/FSArgumentParser'...
warning: templates not found /usr/local/git/share/git-core/templates
Permission denied (publickey).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
Clone of '[email protected]:NSError/ArgumentParser.git' into submodule path 'optool/FSArgumentParser' failed
Cloning into 'optool/FSArgumentParser'...
warning: templates not found /usr/local/git/share/git-core/templates
Permission denied (publickey).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
Clone of '[email protected]:NSError/ArgumentParser.git' into submodule path 'optool/FSArgumentParser' failed
Completed with errors, see above

When removing a load command entry, the dylib ordinal should be reduced by one for all bindings with a higher ordinal than the removed LC.

Failing to do this, the application will crash on startup as the opcodes in the dynamic loader bindings point to the incorrect dylib.

BOOL removeLoadEntryFromBinary(NSMutableData *binary, struct thin_header macho, NSString *payload) {
// parse load commands to see if our load command is already there
binary.currentOffset = macho.offset + macho.size;

uint32_t num = 0;
uint32_t cumulativeSize = 0;
uint32_t removedOrdinal = -1;

...........
if ([dylibname isEqualToString:payload] && removedOrdinal != -1) {
// if ([dylibname isEqualToString:payload] && removedOrdinal == -1) { ???
............

removedOrdinal =-1, it will never remove the payload!!!

Great work here!

Hi there

I need to do some slightly grim Mach-O header hacking on some precompiled binaries I've been given in order to make Xcode deal with them properly.

It would be great if optool had support for inserting/removing the LC_VERSION_MIN_MACOSX load command - that would be the simplest path to getting those binaries working with Xcode (although perhaps not the cleanest!).

If you're feeling generous, support for LC_VERSION_MIN_IPHONEOS might be an extra bonus for our iOS developer friends.