Re: 6.99.32: panic when starting X

[David Laight <david%l8s.co.uk@localhost>]

On Sun, Feb 23, 2014 at 09:56:55PM +0100, Thomas Klausner wrote:
> On Sun, Feb 23, 2014 at 10:34:32AM +0000, Nick Hudson wrote:
> > On 02/23/14 09:41, Thomas Klausner wrote:
> 
> > Also, x/i in ddb/crash that address and "show registers"
> 
> (gdb) x/i  usb_allocmem_flags+0x6c
>    0xffffffff808dbe2c <usb_allocmem_flags+108>: cmp    %rbx,(%rcx)
> 
> > I assume usb_allocmem_flags+0x6c is 0xffffffff808dbe2c
> 
> Correct!
> 
> Does this help?
> 
> I have the kernel (without symbols) and the crash dump if you want to
> know more or look at it.

The kernels I've build don't have a 'cmp' instruction any where near
that offset in usb_allocmem_flags.
The function isn't that big, so if you run 'objdump -d /netbsd >netbsd.dis'
and search for the function body you'll only have about 120 lines.
I can usually work out the source lines from that.
(gdb's 'disas usb_allocmem_flags' probably gives the same lines.)

        David

-- 
David Laight: david%l8s.co.uk@localhost