Hi,
well it helps ( the patch directly didn't work but I
had the idea)
but i got stuck on open socket:
#RTnet, simpleserver for LXRT
#Error opening socket: -12
Eventhough I am able to rtping an other computer...
I am searching but an idea is welcome.
Thanks.
PS: be careful of having two network cards with the
same bios irq!
--- Jan Kiszka <[EMAIL PROTECTED]> a écrit :
> Cédrick ROCHET wrote:
> > hi,
> >
> > I have the latest rtai-rtnet versions and a
> 2.6.14.3
> > kernel version
> >
> > when I launch the rtai-rtnet example I have a
> > segmentation fault.
> > Also rtnet doesn't want to unload => reboot
> machine to
> > get it off.
> >
> > here is my manual launching script
> >
> > ifconfig eth1 down
> > rmmod e100
> > mknod /dev/rtnet c 10 240
> > insmod /usr/realtime/modules/rtai_hal.ko
> > insmod /usr/realtime/modules/rtai_lxrt.ko
> > insmod /usr/realtime/modules/rtai_sem.ko
> > insmod /usr/realtime/modules/rtai_rtdm.ko
> > insmod /usr/local/rtnet/modules/rtnet.ko
> > insmod /usr/local/rtnet/modules/rt_eepro100.ko
> > insmod /usr/local/rtnet/modules/rtipv4
> > /usr/local/rtnet/sbin/rtifconfig rteth0 up
> 10.0.0.1
> > netmask 255.255.255.0
> > /usr/local/rtnet/sbin/rtroute solicit 10.0.0.2 dev
> > rteth0
> >
> > and here is the stack of dmesg for simpleserver (
> the
> > 2 others have the same problem):
> >
> >
> > <1>Unable to handle kernel NULL pointer
> dereference
> > at virtual address 000003f0 printing eip:
> > f8ca0b7b
> > *pde = 24fc1001
> > Oops: 0000 [#2]
> > SMP
> > Modules linked in: rtipv4 rt_eepro100 rtnet
> rtai_rtdm
> > rtai_sem rtai_lxrt rtai_hal lp ipv6 autofs4 rfcomm
> > l2cap bluetooth sunrpc dm_mod video button battery
> ac
> > uhci_hcd parport_pc parport i2c_viapro i2c_core
> > snd_via82xx gameport snd_ac97_codec snd_ac97_bus
> > snd_seq_dummy snd_seq_oss snd_seq_midi_event
> snd_seq
> > snd_pcm_oss snd_mixer_oss snd_pcm snd_timer
> > snd_page_alloc snd_mpu401_uart snd_rawmidi
> > snd_seq_device snd soundcore 8139too mii floppy
> > CPU: 0
> > EIP: 0060:[<f8ca0b7b>] Not tainted VLI
> > EFLAGS: 00010202 (2.6.14.3)
> > EIP is at rtai_lxrt_invoke+0x9b/0x1210 [rtai_lxrt]
> > eax: 0000000f ebx: f8c33a10 ecx: 00000002
> edx:
> > 00000000
> > esi: 00000001 edi: 0f00280c ebp: bffa2650
> esp:
> > e4546f1c
> > ds: 007b es: 007b ss: 0068
> > Process simpleserver (pid: 3623,
> threadinfo=e4546000
> > task=e7058aa0)
> > Stack: bffa5000 00000000 00000001 00000000
> 00000000
> > 00000000 ec76817c ffffffea
> > f549cf20 00000000 bff8f000 bffa5000
> bff8f000
> > bffa5000 00102173 eddc5a40
> > 00000000 000bff8f 00000000 00000001
> e4546f90
> > e4546000 00000003 c0166ea3
> > Call Trace:
> > [<c0166ea3>] do_mlockall+0x83/0xa0
> > [<f8c1af54>] rtai_syscall_dispatcher+0xc4/0x138
> > [rtai_hal]
> > [<f8c1afe2>] rtai_uvec_handler+0x1a/0x38
> [rtai_hal]
> > Code: 05 00 00 89 f8 c1 e8 18 83 e0 0f 8b 14 85 20
> 26
> > cb f8 85 d2 0f 84 ca 0a 00 00 8d 1c ca 8b 33 85 f6
> 0f
> > 84 01 0b 00 00 8b 54 24 6c <8b> 82 f0 03 00 00 85
> c0
> > 0f 88 66 0b 00 00 81 e7 ff 07 00 00 f7
> >
> >
> > When I lunch a lxrt program under rtai without
> rtnet
> > no problem to report.
> > So any idea: wrong compilation, wrong files, .....
> >
>
> I don't have any RTAI system to test my theory
> around anymore, but I
> think I know some possible reason. Please try the
> attached patch.
>
> What I guess is that RTAI does not gracefully catch
> the case the someone
> like our evil examples issue the first LXRT syscall
> before creating any
> RTAI task context.
>
> Please report back if it helps.
>
> Jan
> > Index: examples/rtai/simpleserver.c
>
===================================================================
> --- examples/rtai/simpleserver.c (Revision 940)
> +++ examples/rtai/simpleserver.c (Arbeitskopie)
> @@ -64,22 +64,21 @@
> /* Lock allocated memory into RAM. */
> mlockall(MCL_CURRENT|MCL_FUTURE);
>
> - /* Create new socket. */
> - sockfd = rt_dev_socket(AF_INET, SOCK_DGRAM, 0);
> - if (sockfd < 0) {
> -
> - printf("Error opening socket: %d\n",
> sockfd);
> - exit(1);
> - }
> -
> /* Initialize a real time buddy. */
> lxrtnettsk = rt_task_init(4900, 1, 0, 0);
> if (NULL == lxrtnettsk) {
> - rt_dev_close(sockfd);
> printf("CANNOT INIT MASTER TASK\n");
> exit(1);
> }
>
> + /* Create new socket. */
> + sockfd = rt_dev_socket(AF_INET, SOCK_DGRAM, 0);
> + if (sockfd < 0) {
> + rt_task_delete(lxrtnettsk);
> + printf("Error opening socket: %d\n",
> sockfd);
> + exit(1);
> + }
> +
> /* Switch over to hard realtime mode. */
> rt_make_hard_real_time();
>
>
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