Re: Any insight on what targets _endless_loop__ in libcrt0

__endless_loop__ is placed in section .fini0 (the last of the nine reserved
finalization sections).  One way it can be reached in a normal application
is falling off the end of main().  It is what follows any other
finalization routines, including __stop_progExec__, which is normally empty
and appears in section .fini9.  __stop_progExec__ is jumped to by exit(3c)
if the macro definition of exit() from stdlib.h in msp430-libc is invoked.

So: Returning from main(), invoking exit(3c), or other magic that causes
code to jump into the finalization sections.

Peter


On Fri, Dec 20, 2013 at 6:31 PM, Andrew McLaren <[email protected]>wrote:

> Hi all,
>
> I've got a situation where some logic (running on a 439 MSP430) ends up in
> _endless_loop__ which is part of libcrt0. This can happen after the logic
> has been happily running some intensive test logic for hours, and I'm
> trying
> to ascertain how it could end up there. The debugger is not giving me a lot
> of help (specifically no traceback of how it got here).
>
> There is always a possibility that some memory corruption of mine has let
> the logic go awol, and by its nature if it hits this logic it will be
> trapped here. What I suspect is more likely is that _endless_loop__ is the
> deliberate target of an unrecoverable error in one of the C functions
> (which
> itself is no doubt triggered by something I have done!).
>
> Can someone who understands the msp C runtime support give me any insights
> into the intent behind _endless_loop__, and in what situations it could be
> invoked. If I understand this better it may give me some clues where to
> look.
>
> Thanks, regards, and a great Christmas to all.
>
> Andrew
>
>
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