Fiasco.OC: question regarding l4_ipc_wait() and l4_ipc_reply_and_ipc_wait().

[Сергей Грехов]

Hello, L4Hackers!
I have several questions about two IPC: l4_ipc_wait() and l4_ipc_reply_and_ipc_wait().

1) Is there any way to know on the receive side who had sent the IPC we have catched with l4_ipc_wait()? One of the ways if to enable IPC logging in JDB. But the problem is that trace usually consist of several thousands of IPCs and I need only one. Filtering helps a bit, but still it takes much more time to find needed info.

2) According to the description of l4_ipc_reply_and_ipc_wait() in header file: "A message is sent to the previous caller using the implicit reply capability. Afterwards the invoking thread waits for a message from any source." The question is what events/things/whatever updates this implicit reply capability and what will happen if this capability is invalid?

And one more general question. Is there any documentation on JDB?

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Best regards,
Sergey S. Grekhov