环境：
1、Mac OS X 10.9.2
2、xcode 5.1.1
3、gcc 4.8
4、redsn0w 0.9.15b3
前提：
1、获取 iOS 4.3.3 的kernelcache，并解密
操作步骤：
1、修改 datautils0/sandbox.S 的19行，将“movs r2, #19”改为“movs r2, #1”
2、编译 datautils0，也可以从此处下载
3、制作内核Patch：./make_kernel_patchfile ./kernel-iPod4,1-v4.3.3.decrypted ./kernel-iPod4,1-v4.3.3.patch
4、应用内核Patch：./apply_patchfile ./kernel-iPod4,1-v4.3.3.decrypted ./kernel-iPod4,1-v4.3.3.patch ./kernel-iPod4,1-v4.3.3.patched
5、使用redsn0w引导Patch后的内核：/Applications/redsn0w.app/Contents/MacOS/redsn0w -i iPod4,1_4.3.3_8J2_Restore.ipsw -k kernel-iPod4,1-v4.3.3.patched
6、写demo测试，读取MobileSafari的Info.plist
1 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 2 { 3 NSString *safariInfoFilePath = @"/Applications/MobileSafari.app/Info.plist"; 4 NSDictionary *infoContent = [NSDictionary dictionaryWithContentsOfFile:safariInfoFilePath]; 5 NSLog(@"-------->%@", infoContent); 6 7 self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease]; 8 // Override point for customization after application launch. 9 self.window.backgroundColor = [UIColor whiteColor]; 10 [self.window makeKeyAndVisible]; 11 return YES; 12 }
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接下来找时间详细得读读 datatuils0 的代码。
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