Re: SIGBUS on octeon for my program

On Wed, Nov 27, 2019 at 03:13:19PM +0100, Janne Johansson wrote:
> There was a fix recently for the stack getting unaligned committed just
> recently, do you have that?
> If not, test on current.

Ok it'll take me a bit to test on current, as I don't have that fix yet.

Thanks a lot! I'll come back in a few days to report how it went.

Best Regards,

-peter


> Den ons 27 nov. 2019 kl 14:48 skrev Peter J. Philipp <pjp@centroid.eu>:
>
> > Hi,
> >
> > My DNS program gets a SIGBUS when I execute it. I have ktraced it, upped
> > limits and searched in the mips64 source for answers, could this be a
> > compiler
> > problem?
> >
> > ktrace----->
> > 41651 dddctl CALL connect(6,0xfffffcacb0,16)
> > 41651 dddctl STRU struct sockaddr { AF_INET, 192.168.177.2:10053 }
> > 41651 dddctl RET connect 0
> > 41651 dddctl CALL kbind(0xfffffc9b48,24,0x801d30cbade359aa)
> > 41651 dddctl RET kbind 0
> > 41651 dddctl PSIG SIGBUS SIG_DFL code BUS_ADRALN<1> addr=0xfffffca17d
> > trapno=0
> > 82637 dddctl RET wait4 41651/0xa2b3
> > <-----------
> >
> > The SIGBUS code ADRALN I have found in /sys/arch/mips64/mips64/trap.c
> > around
> > line 463 on OpenBSD 6.6:
> >
> > ------------>
> > case T_ADDR_ERR_LD+T_USER: /* misaligned or kseg access */
> > case T_ADDR_ERR_ST+T_USER: /* misaligned or kseg access */
> > ucode = 0; /* XXX should be PROT_something */
> > signal = SIGBUS;
> > sicode = BUS_ADRALN;
> > break;
> > <-----------
> >
> > I have also set the stack ulimit to 32K but no relief. I'm stuck,
> > wondering
> > if you guys can help with interpreting this.
> >
> > My program can be downloaded with
> >
> > ftp https://delphinusdns.org/download/snapshot/delphinusdnsd-snapshot.tgz
> >
> > Where it's remade at midnight CET every day.
> >
> > As far as I know it should work on macppc although this particular function
> > wasn't tested on macppc. And it works on amd64 as I run this delphinusdnsd
> > in production on my personal nameservers. Getting this working on octeon
> > would broaden my test network.
> >
> > Best Regards,
> > -peter
> >
> >
>
> --
> May the most significant bit of your life be positive.