Re: kern/44402: page fault in supervisor mode in netbsd:filt_piperead

[David Holland <dholland-bugs%netbsd.org@localhost>]

The following reply was made to PR kern/44402; it has been noted by GNATS.

From: David Holland <dholland-bugs%netbsd.org@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: kern/44402: page fault in supervisor mode in netbsd:filt_piperead
Date: Mon, 17 Jan 2011 05:56:33 +0000

 On Sun, Jan 16, 2011 at 06:30:01PM +0000, kristerw%netbsd.org@localhost wrote:
  > Running the current ghc testsuite crash my kernel with
  > 
  > uvm_fault(0xce3c6774, 0, 1) -> 0xe
  > fatal page fault in supervisor mode
  > trap type 6 code 0 eip c0638803 cs 8 eflags 10296 cr2 0 ilevel 0
  > kernel: supervisor trap page fault, code=0
  > Stopped in pid 924.2 (ghc-stage2) at   netbsd:filt_piperead+0xf3: movl 0 
(%ebx),%eax
 
 Can you use gdb or objdump or whatever to figure out which line of
 filt_piperead this is?
 
 also, try setting ddb.commandonenter to "trace".
 
 -- 
 David A. Holland
 dholland%netbsd.org@localhost