Re: link state missing error on 10.6
Re: link state missing error on 10.6
- Subject: Re: link state missing error on 10.6
- From: Andrew Myrick <email@hidden>
- Date: Wed, 27 Jan 2010 11:40:44 -0800
Please file a bug report with a sample kext project that demonstrates the problem.
https://bugreport.apple.com/
-Andrew
On Jan 27, 2010, at 10:23 AM, Michael Eddington wrote:
> Lets forget for a second that I mentioned nsysent. We have what looks
> like broken functionality between 10.5 and 10.6. A kext that uses
> com.apple.kernel as it's dependencies will pass the initial checks for
> kext loading, try to be loaded and then the loader will bail out when
> it finds a null pointer.
>
> Here is the code I found for OSKext.cpp that issues the error message.
>
>> From OSKext::loadExecutable():
>
> if (isKernelComponent()) {
> OSData * kernelLinkState = OSKext::getKernelLinkState();
> kxlddeps[0] = (u_char *)kernelLinkState->getBytesNoCopy();
> } else for (i = 0; i < num_kxlddeps; i++) {
> OSKext * dependency = OSDynamicCast(OSKext, dependencies->getObject(i));
> if (!dependency->linkState) {
> // xxx - maybe we should panic here
> OSKextLog(this,
> kOSKextLogErrorLevel |
> kOSKextLogLoadFlag | kOSKextLogLinkFlag,
> "Can't load kext %s - link state missing.",
> getIdentifierCString());
> goto finish;
> }
> kxlddeps[i] = (u_char *)dependency->linkState->getBytesNoCopy();
> assert(kxlddeps[i]);
> }
>
> -mike
>
> On Tue, Jan 26, 2010 at 9:35 PM, Michael Smith <email@hidden> wrote:
>>
>> On Jan 26, 2010, at 2:55 PM, Michael Eddington wrote:
>>
>> This only appears to happen when my OSBundleLibraries has
>> "com.apple.kernel" "10.2.0" as the dependencies. If I just use,
>> com.apple.kernel.bsd or something it will load fine. Sadly I need to
>> depend on the full com.apple.kernel to resolve nsysent it looks like.
>>
>> nsysent is only interesting if you are trying to patch the syscall table,
>> which is not supported (or generally a good idea).
>> = Mike
>> --
>> Ars longa, vita brevis, occasio praeceps, experimentum periculosum, iudicium
>> difficile -- Hippocrates
>>
>>
>>
>>
>>
>>
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