Re: [Xenomai-help] invalid use of FPU in Xenomai context

[Jeff Webb <jeff.webb@domain.hid>]

Jan Kiszka wrote:
> Jeff Webb wrote:
>> If I run the attached program, I get the following result:
>>
>>  [root]# ./mqtest2
>>  CPU time limit exceeded
>>
>> The kernel log contains:
>>
>>  Oct 25 14:13:03 kernel: invalid use of FPU in Xenomai context at 0x80492f6
> 
> Can you do a backtrace in gdb?
> 

# gdb ./mqtest2
GNU gdb Red Hat Linux (6.3.0.0-1.122rh)
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This GDB was configured as "i386-redhat-linux-gnu"...Using host libthread_db library "/lib/libthread_db.so.1".

(gdb) r
Starting program: mqtest2
Reading symbols from shared object read from target memory...done.
Loaded system supplied DSO at 0xffffe000
[Thread debugging using libthread_db enabled]
[New Thread -1208785216 (LWP 3484)]
[New Thread -1208788064 (LWP 3487)]
received message: count: 1 0.000000

Program received signal SIGXCPU, CPU time limit exceeded.
[Switching to Thread -1208788064 (LWP 3487)]
rt_loop (arg=0x0) at mqtest2.c:74
74              f = f + 0.1*count;
(gdb) bt
#0  rt_loop (arg=0x0) at mqtest2.c:74
#1  0xb7f53545 in __pthread_trampoline ()
   from /usr/xenomai/lib/libpthread_rt.so.0
#2  0x0092940b in start_thread () from /lib/libpthread.so.0
#3  0x00757b7e in clone () from /lib/libc.so.6
(gdb)