Fwd: RTEMS error codes

[Sebastian Huber]

On 06/11/2018 16:17, Catalin Demergian wrote:
>
>
> ---------- Forwarded message ---------
> From: *Catalin Demergian* <demergian at gmail.com 
> <mailto:demergian at gmail.com>>
> Date: Tue, Nov 6, 2018 at 5:14 PM
> Subject: RTEMS error codes
> To: Sebastian Huber <sebastian.huber at embedded-brains.de 
> <mailto:sebastian.huber at embedded-brains.de>>
>
>
> Hello,
> I'm trying to integrate a USB device stack in 4.11.3 for STM32H7 and
> after I called my USB initialization function just before initializing 
> the shell RTEMS
> task I get an exception and _Terminate is called.
>
> void _Terminate(
>
> Internal_errors_Source  the_source,
>
> bool is_internal,
>
> Internal_errors_t       the_error
>
> )
>
> {
>
> ISR_Level level;
>
> _ISR_Disable_without_giant( level );
>
> (void) level;
>
> _SMP_Request_shutdown();
>
> _User_extensions_Fatal( the_source, is_internal, the_error );
>
> _Internal_errors_What_happened.the_source  = the_source;
>
> _Internal_errors_What_happened.is_internal = is_internal;
>
> _Internal_errors_What_happened.the_error = the_error;
>
> _System_state_Set( SYSTEM_STATE_TERMINATED );
>
> _CPU_Fatal_halt( the_source, the_error );
>
>   /* will not return from this routine */
>
> while (true);
>
> }
>
>
> by printing _Internal_errors_What_happened in debugger I get this
> p /x _Internal_errors_What_happened
>
> $2 = {the_source = 0x9, is_internal = 0x0, the_error = 0x20001100}
>
>
> how should I interpret the value 0x20001100 ?
>
> I would like to understand what is the nature of the error I'm having.
>
> How is this value composed ? maybe 0x1100 is added over 0x20000000 ?
>
> I couldn't find in the code so far .. a pointer to the piece of code 
> where this is done
>
> would be helpful.
>

See the documentation, fatal source 9 is RTEMS_FATAL_SOURCE_EXCEPTION 
and the 0x20001100 is a pointer value to the exception frame.

https://docs.rtems.org/branches/master/c-user/fatal_error.html#fatal-sources

-- 
Sebastian Huber, embedded brains GmbH

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