On Thu, 28 Nov 2013 23:01:20 +0100
Philippe Gerum <[email protected]> wrote:
> On 11/28/2013 02:31 PM, Bukuli Norbert wrote:
> > Hello!
> >
> > I am having a little problem with some programs from the Xenomai
> > test suite. The clocktest, cyclictest and switchtest crashes with
> > "Illegal instruction":
> >
> > ~ # /usr/xenomai/bin/clocktest
> > == Tested clock: 0 (CLOCK_REALTIME)
> > CPU ToD offset [us] ToD drift [us/s] warps max delta [us]
> > --- -------------------- ---------------- ---------- --------------
> > 0 0.0 0.000 0 0.0
> > Illegal instruction
> >
> >
>
> Please make sure you are using a compiler for the 6xx processor
> family, for building the user-space programs for an
> icecube/lite52xx/tqm5200 board.
I use eldk-switch in this way:
$ eldk-switch -r 5.4 gccb
[ gccb is using MPC5200 ]
Setup for powerpc (using ELDK 5.4)
with the following modification on the eldk-map.dat:
gccb MPC5200
(GCCB is our custom MPC5200 based board)
$ echo $CC
powerpc-linux-gcc -m32 -mhard-float
--sysroot=/opt/eldk-5.4/powerpc/sysroots/powerpc-linux
$ echo $CFLAGS
-O2 -pipe -g -feliminate-unused-debug-types
$ powerpc-linux-gcc -dumpspecs | grep 603
... %{mcpu=603: -mppc} %{mcpu=603e: -mppc} ...
I set the -mcpu=603e compilation flag on the trivial posix test, but this did
not help.
>
> If the issue is still there, you should run the failing test over
> gdb, then paste the backtrace output ("bt" command) obtained after
> the fault to this list.
Because there is limited amount of memory in our embedded system (32 MiB), I
did the following:
On the target system:
~ # gdbserver 172.31.2.11:2001 /usr/xenomai/bin/clocktest
On the host system:
$ eldk-switch -r 5.4 gccb
[ gccb is using MPC5200 ]
Setup for powerpc (using ELDK 5.4)
$ powerpc-linux-gdb usr/xenomai/bin/clocktest
(gdb) set sysroot /opt/eldk-5.4/powerpc/sysroots/powerpc-linux
(gdb) target remote 172.31.2.11:2001
Remote debugging using 172.31.2.11:2001
Reading symbols from
/opt/eldk-5.4/powerpc/sysroots/powerpc-linux/lib/ld.so.1...Reading symbols from
/opt/eldk-5.4/powerpc/sysroots/powerpc-linux/lib/.debug/ld-2.17.so...done.
done.
Loaded symbols for /opt/eldk-5.4/powerpc/sysroots/powerpc-linux/lib/ld.so.1
_start () at ../sysdeps/powerpc/powerpc32/dl-start.S:32
32 ../sysdeps/powerpc/powerpc32/dl-start.S: No such file or directory.
(gdb) cont
Continuing.
warning: Could not load shared library symbols for linux-vdso32.so.1.
Do you need "set solib-search-path" or "set sysroot"?
warning: .dynamic section for
"/opt/eldk-5.4/powerpc/sysroots/powerpc-linux/usr/xenomai/lib/libpthread_rt.so.1"
is not at the expected address (wrong library or version mismatch?)
warning: .dynamic section for
"/opt/eldk-5.4/powerpc/sysroots/powerpc-linux/usr/xenomai/lib/libxenomai.so.0"
is not at the expected address (wrong library or version mismatch?)
[New Thread 280]
Program received signal SIGILL, Illegal instruction.
[Switching to Thread 280]
0x0fdf4e74 in ?? () from
/opt/eldk-5.4/powerpc/sysroots/powerpc-linux/lib/libc.so.6
(gdb) bt
#0 0x0fdf4e74 in ?? () from
/opt/eldk-5.4/powerpc/sysroots/powerpc-linux/lib/libc.so.6
#1 0x0ffd8af8 in sched_setconfig_np ()
from
/opt/eldk-5.4/powerpc/sysroots/powerpc-linux/usr/xenomai/lib/libpthread_rt.so.1
#2 0x0ff7ba68 in start_thread (arg=0xbffffdd0) at pthread_create.c:313
#3 0x4802ff18 in _rtld_global_ro () from
/opt/eldk-5.4/powerpc/sysroots/powerpc-linux/lib/ld.so.1
Backtrace stopped: frame did not save the PC
As you can see, I have some problems with the GDB search paths, but the
significant information is conspicuous.
>
> > When I turn the debug.exception-trace kernel option on,
> > and run the clocktest, I have got the following kernel message:
> >
> > clocktest[243]: unhandled signal 4 at 0fdf4e74 nip 0fdf4e74 lr
> > 0ffd8af8 code 30001
> >
>
> gdb will give you the faulty location in symbolic form.
If you can suggest, please, how I can override loaded libraries in gdb, then I
will repeat the tests.
>
> > I have read in a previous messages on this list, that the
> > CONFIG_XENO_HW_UNLOCKED_SWITCH option should be turned off, but
> > unfortunately this did not help.
> >
>
> Unlocked switching is no more an issue with 3.8.13 and beyond.
Then I will turn it on again.
>
--
Norbert Bukuli
software engineer
embedded development
Mediso Ltd.
Tel.: +36 1 3993 030 Fax.: +36 1 3993 040
Mailing address: Hungary, H-1047 Budapest, Baross utca 91-95.
Billing address: Hungary, H-1022 Budapest, Alsotorokvesz 14.
[email protected]
www.mediso.com
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