Gilles Chanteperdrix wrote:
> Eric Cohen wrote:
>> Hello, I am attempting to evaluate Xenomai and am running into an
>> illegal instruction when I try to run trivial-periodic. I am running
>> Xenomai 2.5.5.2 with kernel 2.6.33.5-x3 on a Beagleboard. Kernel and
>> Xenomai were cross compiled with CodeSourcery 4.4.1. Upon boot I can
>> see /proc/xenomai/*. Attempting to run trivial-periodic results in
>> the following output:
>>
>> Xenomai or CONFIG_XENO_OPT_PERVASIVE disabled.
>> (modprobe xeno_nucleus?)
>>
>> Note that CONFIG_XENO_OPT_PERVASIVE is in fact enabled, and nucleus is
>> built into the kernel. Running in GDB, trivial-periodic receives
>> SIGILL (illegal instruction) and exits. I get the following
>> backtrace:
>>
>> #0 0x40022498 in xeno_bind_skin_opt () from /usr/xenomai/lib/libxenomai.so.0
>> #1 0x00000000 in ?? ()
>>
>> And the disassembly around the PC is:
>>
>> 0x4002247c <+124>: movw r0, #555 ; 0x22b
>> 0x40022480 <+128>: mov r6, r5
>> 0x40022484 <+132>: mov r1, r8
>> 0x40022488 <+136>: mov r2, #1610612743 ; 0x60000007
>> 0x4002248c <+140>: mov r3, #3
>> 0x40022490 <+144>: mov r4, r7
>> 0x40022494 <+148>: svc 0x009f0042
>> => 0x40022498 <+152>: ldr r12, [sp, #2140] ; 0x85c
>> 0x4002249c <+156>: cmp r12, #0
>> 0x400224a0 <+160>: beq 0x4002246c <xeno_bind_skin_opt+108>
>> 0x400224a4 <+164>: mov r2, r0
>> 0x400224a8 <+168>: mvn r1, #84 ; 0x54
>> 0x400224ac <+172>: mov r0, r11
>> 0x400224b0 <+176>: bl 0x400220d8
>> 0x400224b4 <+180>: cmn r0, #85 ; 0x55
>>
>> The other example programs result in a SIGILL in exactly the same place.
>>
>> Does anyone have any ideas or suggestions?
>
> I would say you have incompatible ABI settings for kernel-space and
> user-space.
Here we definitely see an OABI syscall. So, your kernel is probably
configured for EABI.
--
Gilles.
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