Hello Johannes,
The message "libc suspend() called from non-user context" indicates that you are using POSIX I/O from the initial Libc::Component 'kernel' context, and not the 'user' context. To switch to a user context, supply user level code as a lambda to the 'Libc::with_libc(...)' function. Looking at your code I see that this would likly just be a lamba to wrap the construction of Sntp::Main and a lambda of the body of the Rtc::current_time() RPC method. One example of with_libc in user can be found in genode/repos/gems/src/server/tcp_terminal/main.cc.
Cheers, Emery
On Tue, 6 Feb 2018 23:19:16 +0100 Johannes Kliemann <kliemann@...543...> wrote:
Hi all,
when I use the lwip networking I sometimes get the following error:
Error: libc suspend() called from non-user context (0x117549a) - aborting
I have tracked it down to a call of getaddrinfo yet I could not find out when exactly and why this happens. It occurs at ca. 50% of the tries. Does anyone have an idea how to fix that?
Also is there a way to check if an IP is available? Sleeping a few seconds and hoping that DHCP assigned an address does not seem a reliable solution to me.
The full code is available at [1], [2] and [3] while the error happens in [3] at line 24. To test it yourself, check out [4] and run `make run/sntp`.
Regards, Johannes
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