i386ex: hangups during initialization

[Joel Sherrill]

Angelo Fraietta wrote:
> 
> I had a similar bug a while ago. I set
> #define CONFIGURE_MICROSECONDS_PER_TICK 1000 /* 1 ms */
> to 5000 when I ran it on the 386 machine. After the soft float problem was
> fixed, I set it back to 1000, however, I was only running three tasks.

I could be wrong but I have to wonder what instruction is at the
address reported in the exception and what exception 13 is.  Is
this happening on an FP instruction?

--joel
 
> Jürgen Zeller wrote:
> 
> > hello everybody,
> >
> > I'm doing my first steps with RTEMS 4.5 and I have big
> > problems building RTEMS for i386ex.
> > During the initialization my system hangs up, so I tried to
> > find out, what the reason is. I've inserted many 'printk's'
> > in the rtems_executive_early function to see, how much code
> > gets processed.
> > But after a while I found out that the error is not constant at the
> > same time or function, it depends for example how much printk's I issue!
> > But in following illogical manner:
> >  so more printk's I use so more code I get processed!
> >
> > I've checked my register settings, my linkcmds and my start.S often
> > but I can't find the error.
> >
> > Has anybody an idea what could go wrong in my application?
> > Could it be a Hardware problem?
> > I use a bootloader for downloading, could this be the reason? And why?
> >
> > I have no experience with RTEMS and I would be obliged for every tip I
> > get.
> >
> > RAM     0x00000000 .. 0x0003ffff
> > Flash   0x00080000 .. 0x000fffff
> >
> > here my printk - results
> >
> >  rtems_initialize_executive_early: 001
> >  rtems_initialize_executive_early: 002
> >  rtems_initialize_executive_early: 003
> >  rtems_initialize_executive_early: 003
> >  rtems_initialize_executive_early: 003
> >  rtems_initialize_executive_early: 003
> >  rtems_initialize_executive_early: 003
> >  rtems_initialize_executive_early: 003
> >  rtems_initialize_executive_early: 003
> >  rtems_initialize_executive_early: 003
> >  rtems_initialize_executive_early: 003
> >  rtems_initialize_executive_early: 003
> >  rtems_initialize_executive_early: 004
> >  rtems_initialize_executive_early: 005
> >  rtems_initialize_executive_early: 006
> >  rtems_initialize_executive_early: 007
> >  rtems_initialize_executive_early: 008
> >  rtems_initialize_executive_early: 009
> >  rtems_initialize_executive_early: 010
> >  rtems_initialize_executive_early: 011
> >  rtems_initialize_executive_early: 012
> >  rtems_initialize_executive_early: 013
> >  rtems_initialize_executive_early: 014
> > ----------------------------------------------------------
> > Exception 13 caught at PC 87F66 by thread -1912602608
> > ----------------------------------------------------------
> > Processor execution context at time of the fault was  :
> > ----------------------------------------------------------
> >  EAX = B624     EBX = 46        ECX = B620      EDX = FFFFFFFF
> >  ESI = 0        EDI = 200144    EBP = B5CC      ESP = B5B0
> > ----------------------------------------------------------
> > Error code pushed by processor itself (if not 0) = 0
> > ----------------------------------------------------------
> >  ************ FAULTY THREAD WILL BE DELETED **************
> > ----------------------------------------------------------
> > Exception 13 caught at PC 87F66 by thread -1912602608
> > ----------------------------------------------------------
> > Processor execution context at time of the fault was  :
> > ----------------------------------------------------------
> >  EAX = B624     EBX = 46        ECX = B620      EDX = FFFFFFFF
> >  ESI = 0        EDI = 200144    EBP = B5CC      ESP = B5B0
> > ----------------------------------------------------------
> > Error code pushed by processor itself (if not 0) = 0
> > ----------------------------------------------------------
> >  ************ FAULTY THREAD WILL BE DELETED **************
> > ----------------------------------------------------------
> > Exception 13 caught at PC 87F66 by thread -1912602608
> > ----------------------------------------------------------
> > Processor execution context at time of the fault was  :
> > ----------------------------------------------------------
> >  EAX = B624     EBX = 46        ECX = B620      EDX = FFFFFFFF
> >  ESI = 0        EDI = 200144    EBP = B5CC      ESP = B5B0
> > ----------------------------------------------------------
> > Error code pushed by processor itself (if not 0) = 0
> > ----------------------------------------------------------
> >  ************ FAULTY THREAD WILL BE DELETED **************
> > ----------------------------------------------------------
> > Exception 13 caught at PC 87F66 by thread -1912602608
> > ----------------------------------------------------------
> > Processor execution context at time of the fault was  :
> > ----------------------------------------------------------
> >  EAX = B624     EBX = 46        ECX = B620      EDX = FFFFFFFF
> >  ESI = 0        EDI = 200144    EBP = B5CC      ESP = B5B0
> > ----------------------------------------------------------
> > Error code pushed by processor itself (if not 0) = 0
> > ----------------------------------------------------------
> >  ************ FAULTY THREAD WILL BE DELETED **************
> > ----------------------------------------------------------
> > Exception 13 caught at PC 87F66 by thread -1912602608
> > ----------------------------------------------------------
> > Processor execution context at time of the fault was  :
> > ----------------------------------------------------------
> >  EAX = B624     EBX = 46        ECX = B620      EDX = FFFFFFFF
> >  ESI = 0        EDI = 200144    EBP = B5CC      ESP = B5B0
> > ----------------------------------------------------------
> > Error code pushed by processor itself (if not 0) = 0
> > ----------------------------------------------------------
> >  ************ FAULTY THREAD WILL BE DELETED **************
> > ----------------------------------------------------------
> >
> > thanks a lot for your help!
> >
> > --
> >  Jürgen Zeller
> >  Entwicklung Software
> >  TVI Lederer GmbH & Co KG
> >  Industriestr. 4, 93161 Sinzing
> >  Tel. 0941-3073761 - Fax 0941-3073737
> 
> --
> Angelo Fraietta
> 
> PO Box 859
> Hamilton NSW 2303
> 
> Home Page
> 
> http://users.hunterlink.net.au/~maaaf/
> 
> There are those who seek knowledge for the sake of knowledge - that is
> CURIOSITY
> There are those who seek knowledge to be known by others - that is VANITY
> There are those who seek knowledge in order to serve - that is LOVE
>     Bernard of Clairvaux (1090 - 1153)

-- 
Joel Sherrill, Ph.D.             Director of Research & Development
joel at OARcorp.com                 On-Line Applications Research
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