>>>>> "David" == David Scheidt <[EMAIL PROTECTED]> writes:
[...]
David> Have you looked a t Greg Lehey's how to debug vinum pages at
David> http://www.lemis.com/vinum/how-to-debug.html ?
Very much so. The issue is that the whole stack trace (which I have
posted in stable before) looks like this:
#0 boot (howto=256) at ../../kern/kern_shutdown.c:285
#1 0xc0152f68 in at_shutdown (
function=0xc0237fc6 <__set_sysinit_set_sym_memdev_sys_init+1050>, arg=0x0,
queue=12) at ../../kern/kern_shutdown.c:446
#2 0xc0209c15 in trap_fatal (frame=0xc0241260, eva=0)
at ../../i386/i386/trap.c:942
#3 0xc02098f3 in trap_pfault (frame=0xc0241260, usermode=0, eva=0)
at ../../i386/i386/trap.c:835
#4 0xc0209596 in trap (frame={tf_es = 1835991056, tf_ds = 1701904400,
tf_edi = -1073215488, tf_esi = -1058170880, tf_ebp = -1071377704,
tf_isp = -1071377784, tf_ebx = -1057735652, tf_edx = 0,
tf_ecx = -1057735652, tf_eax = -1073215488, tf_trapno = 12, tf_err = 0,
tf_eip = 0, tf_cs = 8, tf_eflags = 66054, tf_esp = -1072233935,
tf_ss = -1057735652}) at ../../i386/i386/trap.c:437
#5 0x0 in ?? ()
Now... some very helpful people have pointed out that the value of
tf_esp (the stack pointer) does not make sense --- it is not byte
aligned. The best guess at analysis currently is that stack
corruption is occuring and some function is returning to a NULL value
on the stack.
Now... this is very hard to debug. I need to find the stack or find
information about the stack. It would be really cool to know what
function is causing corruption on the stack.
But nosing around a large corefile looking for the kernel stack is a
long process that tends to make me sleepy.
Does the kernel stack start at the same place each boot?
Is there a way of finding the stack that caused this call to trap()
Help? I'm willing to do quite a lot of grunt work here (it's worth
about $4000 to me to solve this problem), but I need some help.
Dave.
--
============================================================================
|David Gilbert, Velocet Communications. | Two things can only be |
|Mail: [EMAIL PROTECTED] | equal if and only if they |
|http://www.velocet.net/~dgilbert | are precisely opposite. |
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