Re: init can't start with -current on old(ish) userland

["Michael L. Hitch" <mhitch%lightning.msu.montana.edu@localhost>]

On Mon, 14 Jun 2010, Simon Burge wrote:

> When I boot a -current sbmips kernel with today's (June 13 2010)
> sources, I get about half a dozen of the following errors:
>
> pid 1(init): ABI set to O32 (e_flags=0x1007)
> trap: pid 1(init): sig 11: cause=0x1c epc=0x7dfa5e10 va=0x7dda094f
> registers:
> [ 0]=00000000 [ 1]=00000000 [ 2]=ffffffff [ 3]=7dda094e
> [ 4]=00401054 [ 5]=7dda094e [ 6]=7dd901f4 [ 7]=00000000
> [ 8]=00000000 [ 9]=00000000 [10]=004460f0 [11]=2f6c6962
> [12]=00000001 [13]=000007de [14]=000007d1 [15]=8fd405e0
> [16]=000006fa [17]=7dd9bfd8 [18]=0000005f [19]=7dda08f8
> [20]=7dd95038 [21]=7dff8600 [22]=00401054 [23]=7fffddec
> [24]=7000000a [25]=7dfab980 [26]=00000000 [27]=00000000
> [28]=7dff6fe0 [29]=7fffdd54 [30]=7fffdf90 [31]=7dfa5f08
>
> and then the board wedges.  The last message was:
>
> Process (pid 1) got sig 11    <- cursor stuck here
>
> This userland works with an August 13 2009 kernel.
>
> Before I start digging, is this still known -current lossage?  There's
> a couple of similar references to init dieing back in March and April
> of this year, but nothing recent.

  I believe it's still known -current lossage dating from the big merge in 
December.  [I can't remember if anyone has actually verified that this 
started with that merge, and I haven't gotten ambitious enough to try it.]

  Martin submitted a PR recently on this (43431), with a discussion on 
port-mips:
(http://mail-index.NetBSD.org/port-mips/2010/06/08/msg000274.html).

  I do not get the init trap on my DECstation 5000/260.  Instead, it 
starts running and appears to be runing ld.elf_so code and gets several 
TLB misses, does a few syscalls, and then hangs hard.  I have to power 
cycle at that point.

  I've looked at that big merge a bit, but haven't spotted anything 
obviously glaring yet.

--
Michael L. Hitch                        mhitch%montana.edu@localhost
Computer Consultant
Information Technology Center
Montana State University        Bozeman, MT     USA