From: Petter Fryklund <petter.fryklund@atero.se>
Subject: Re: Unhandled Exception in Tartan generated code for M68040
Date: Sun, 6 Aug 2017 22:48:55 -0700 (PDT)
Date: 2017-08-06T22:48:55-07:00 [thread overview]
Message-ID: <e0ee880a-1b36-4711-98fd-21d739dc2f25@googlegroups.com> (raw)
In-Reply-To: <esnbmiFlhnuU1@mid.individual.net>
Den onsdag 12 juli 2017 kl. 21:30:28 UTC+2 skrev Niklas Holsti:
> On 17-07-07 12:58 , Petter Fryklund wrote:
> > Hi, I'm trying to locate an Unhandled Exception. The printout
> > received is
> >
> > Unhandled Exception vector 37 at 45E6C
> >
> > or
> >
> > Unhandled Exception vector 18 at 10A40E
> >
> > I assume there is a way to use the .map file to find out where these
> > exceptions occur, but endless googling has come up with nil.
>
> And in another message, Petter continued:
>
> > the Unexpected Exception is erronous, the code has exception
> > handler everywhere.
>
> Are you sure, Petter, that "exception" in "Unhandled Exception" means an
> Ada exception? I seem to remember that some processors use the term
> "exception" for what is more commonly called a "trap". Perhaps these are
> HW traps that are _not_ mapped to Ada exceptions?
>
> The Wikipedia page on M68000
> (https://en.wikipedia.org/wiki/Motorola_68000_series) uses the term
> "exception" for HW events,and so does the M68040 User Manual
> (http://cache.freescale.com/files/32bit/doc/ref_manual/MC68040UM.pdf).
>
> Table 8-1 in the User Manual lists these HW exceptions, by number. It
> seems that numbers 32..47 are of SW origin, triggered by the TRAP
> instruction, while number 18 is described as "Unassigned, Reserved".
> Numbers 25..31 are "Interrupt Autovectors". This suggests that these HW
> exceptions should be treated as interrupts in the Ada program, that is,
> processed by interrupt handlers, not by exception handlers. On the other
> hand, the Tartan run-time system may map some of these HW exceptions to
> Ada exceptions, for example number 5, which is "Integer Divide by Zero".
>
> (Disclaimer: I know nothing about the Tartan compiler.)
>
> --
> Niklas Holsti
> Tidorum Ltd
> niklas holsti tidorum fi
> . @ .
Thanks for responding, Niklas.
Your suggestion makes sense since one would expect the program to stop on an Unhandled Exception, but it continues. But I cannot figure out what the 6 digit hex number is in that case.
Regards,
Petter
next prev parent reply other threads:[~2017-08-07 5:48 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-07 9:58 Unhandled Exception in Tartan generated code for M68040 Petter Fryklund
2017-07-07 16:05 ` Anh Vo
2017-07-07 16:09 ` Simon Wright
2017-07-12 15:20 ` Petter Fryklund
2017-07-12 19:30 ` Niklas Holsti
2017-08-07 5:48 ` Petter Fryklund [this message]
2017-08-07 6:21 ` Niklas Holsti
2017-08-08 5:33 ` Petter Fryklund
2017-08-16 11:04 ` Petter Fryklund
2017-09-04 8:46 ` Petter Fryklund
replies disabled
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox