topic Intel SGX, sgx_create_enclave() never returns if called from dllmain() in Intel® Software Guard Extensions (Intel® SGX)

Intel SGX, sgx_create_enclave() never returns if called from dllmain()

mingbo_z_1 — Sat, 12 Mar 2016 04:32:53 GMT

Hello,

SGX API works fine if it's called from a process. I can create an enclave successfully.

But when sgx_create_enclave() is called from dllmain(), it never returns. It eventually calls WaitForSingleObject() and wait there.

No matter the dll is injected into a process or load by a process.

Thanks :)
uty

I installed the latest

Mingbo_Z_ — Wed, 23 Mar 2016 20:25:13 GMT

I installed the latest version of SDK, still got the same problem.

I believe this is due to a

Francisco_C_Intel — Mon, 28 Mar 2016 18:35:18 GMT

I believe this is due to:

Dynamic-Link Library Best Practices https://msdn.microsoft.com/en-us/library/windows/desktop/dn633971(v=vs.85).aspx

"You should never perform the following tasks from within DllMain:
* Call LoadLibrary or LoadLibraryEx (either directly or indirectly). This can cause a deadlock or a crash."

(edited to fix link)

Quote:FRANCISCO C. (Intel)

Mingbo_Z_ — Tue, 29 Mar 2016 20:11:51 GMT

FRANCISCO C. (Intel) wrote:

I believe this is due to:

Dynamic-Link Library Best Practices https://msdn.microsoft.com/en-us/library/windows/desktop/dn633971(v=vs.85).aspx

"You should never perform the following tasks from within DllMain:
* Call LoadLibrary or LoadLibraryEx (either directly or indirectly). This can cause a deadlock or a crash."

(edited to fix link)

Thanks for the reply and link :)

I know sgx_create_enclave() will load xxx.signed.dll at some point. I want use sgx in some processes which I don't have source code. I guess I have to use sgx_create_enclave() lazily (The first time I need to use enclave).

Thanks :)