Theos on Mavericks: symbols not found

StackOverflow https://stackoverflow.com/questions/22537625

Question

Please scroll down, update below

I used this tutorial to get my hands dirty on Theos and jailbreak tweak development: http://iphonedevwiki.net/index.php/Theos/Getting_Started

The question has been posted before ( Theos for armv7 and arm64 ), but it hasn't been answered.

To start, I just want to make a console message appear whenever I unlock the device. I followed the tutorial, but had to install dpkg via MacPorts to get ldid up and running.

Here's my code:

Tweak.xm:

%hook SBAwayLockBar

- (void)unlock {
    %orig;
    NSLog( @"SBAwayLockBar.unlock()" );
}

%end

makefile:

include theos/makefiles/common.mk

TWEAK_NAME = TweakTest01
TweakTest01_FILES = Tweak.xm
TweakTest01_FRAMEWORKS = UIKit

include $(THEOS_MAKE_PATH)/tweak.mk

after-install::
    install.exec "killall -9 SpringBoard"

This happens when I try to either make or make package install:

/tmp/theos/makefiles/targets/Darwin/iphone.mk:41: Deploying to iOS 3.0 while building for 6.0 will generate armv7-only binaries.
Making all for tweak TweakTest01...
 Linking tweak TweakTest01...
ld: warning: ignoring file /tmp/theos/lib/libsubstrate.dylib, missing required architecture armv7 in file /tmp/theos/lib/libsubstrate.dylib (2 slices)
Undefined symbols for architecture armv7:
  "_MSHookMessageEx", referenced from:
      _logosLocalInit() in Tweak.xm.6991e5bc.o
ld: symbol(s) not found for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [obj/TweakTest01.dylib.ba964c90.unsigned] Error 1
make[1]: *** [internal-library-all_] Error 2
make: *** [TweakTest01.all.tweak.variables] Error 2

I tried a /usr/bin/xcode-select --install (as suggested by Failed to build Saurik's ldid utility), but that didn't help at all - mainly because I had all Xcode tools already installed.

Any hints?

UPDATE 2014-03-25

So... it seems like the problem was a space in the path names that I worked in. After renaming the folder from "jailbreak stuff" to "jailbreakstuff", make ran fine. But since the tweak I wrote didn't really do anything, I started from scratch.

Here's what I did:

  1. Get a theos installer script from https://gist.github.com/tom-go/3342263
  2. Edit install_theos.sh line 40 to msdeb="mobilesubstrate_0.9.5001_iphoneos-arm.deb" (newest version when browsing http://apt.saurik.com/debs/ )

  3. I noticed getting ldid from the given Dropbox URL resulted in an error because the file that had been downloaded only included some HTML ("You will be redirected..."); so I referred back to http://iphonedevwiki.net/index.php/Theos/Getting_Started#For_Mac_OS_X and executed step #4

    git clone git://git.saurik.com/ldid.git
cd ldid
git submodule update --init
./make.sh
cp -f ./ldid $THEOS/bin/ldid

Here are my sources:

Tweak.mm/Tweak.mm (symlink)

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
#import <SpringBoard/SpringBoard.h>

%hook SBAwayLockBar

- (void)unlock {
     %orig;
     %log;

    // Call flash on SBScreenFlash => will flash Screen
    [[%c(SBScreenFlash) sharedInstance] flash];
}

%end

makefile

export ARCHS = armv7 armv7s arm64
export TARGET = iphone:clang:7.1:7.1

include theos/makefiles/common.mk

TWEAK_NAME = TweakTest01
TweakTest01_FILES = Tweak.xm
TweakTest01_FRAMEWORKS = UIKit Foundation

include $(THEOS_MAKE_PATH)/tweak.mk

after-install::
    install.exec "killall -9 SpringBoard"

Here's some console output of make package (I replaced "mycompanyname" before posting here):

Making all for tweak TweakTest01...
 Preprocessing Tweak.xm...
 Compiling Tweak.xm...
 Linking tweak TweakTest01...
 Stripping TweakTest01...
 Signing TweakTest01...
Making stage for tweak TweakTest01...
dpkg-deb: Baue Paket »com.mycompanyname.tweaktest01« in »./com.mycompanyname.tweaktest01_0.0.1-9_iphoneos-arm.deb«.

Now I transfer the file with iFunBox and install the package by selecting it in iFile. Installation works fine. I respring my device, unlock it... and no flash, no log output. The only thing the (Xcode - Organizer) log shows is

SpringBoard[4602] <Notice>: MS:Notice: Loading: /Library/MobileSubstrate/DynamicLibraries/TweakTest01.dylib
SpringBoard[4602] <Warning>: MS:Warning: nil class argument for selector unlock

I tried two different libsubstrate.dylib versions

but the behaviour is the same. What's next? :)

Was it helpful?

Solution 2

Whooohooo, I got it! Thanks to #theos on irc.saurik.com, I found out that I tried to hook a deprecated header method. Now my Tweak.xm looks like this:

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
#import <SpringBoard/SpringBoard.h>

%hook SBLockScreenViewController

- (void) finishUIUnlockFromSource:(int)arg1 {
    %orig;
    %log;

    NSLog( @"arg1: %d", arg1 );
    [[%c(SBScreenFlash) sharedInstance] flash];

}

%end

Just for reference:

http://developer.limneos.net/?framework=SpringBoard&header=SBLockScreenViewControllerBase.h https://github.com/thomasfinch/iOS-7-SpringBoard-Headers

OTHER TIPS

This is a problem with your libsubstrate.dylib (in theos/lib/), which doesn't seem to contain an armv7 slice. Try downloading a new one and replace yours (maybe this one would work)

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