Hang at probing on VMware installation

Jun Kuriyama kuriyama at imgsrc.co.jp
Sat Aug 28 22:59:37 PDT 2004

At Sat, 28 Aug 2004 10:20:09 +0000 (UTC),
Poul-Henning Kamp wrote:
> >VMware said "unrecoverable error" and "Exception 0xc0000005 {access
> >violation} has occured" and virtual machine has stopped.
> Is there any way to get mode detailed diagnostics ?  Like the
> program counter or anything ?

In fdc_initial_reset() shows here:

fdc0: <Enhanced floppy controller> at port 0x3f7,0x3f0-0x3f5 irq 6 drq 2 on isa2


Actual hang up is in loop in device_probe_and_attach().

With BUS_DEBUG, final output is here:

device_probe_child:1556: Start find loop
device_probe_child:1561: Trying bt
devclass_find_internal:752: looking for bt
devclass_add_device:1225: (null) in devclass bt
devclass_alloc_unit:1158: unit -1 in devclass bt
devclass_alloc_unit:1198: now: unit 1 in devclass bt
devclass_delete_device:1264: bt in devclass bt
device_probe_child:1561: Trying cbb
devclass_find_internal:752: looking for cbb
devclass_add_device:1225: (null) in devclass cbb
devclass_alloc_unit:1158: unit -1 in devclass cbb
devclass_alllass cbb
device_probe_child:1561: Trying sn
devclass_t:1158: unit -1 in devclass sn
devclass_alloc_unit:1198: now: unit 1 in devclass sn
devclass_delete_device:1264: sn in devclass sn
device_probe_child:1561: Trying stg
devclass_find_internal:752: looking for stg
devclass_add_device:1225: (null) in devclass stg
devclass_alloc_unit:1158: unit -1 in devclass stg
devclass_alloc_unit:1198: now: unit 0 in devclass stg

This is called from isa_probe_children(), isa_assign_resources(i=40)
returns true, device_probe_and_attach().

Where should I check next?  Inside of device_probe_child() or resouce
allocation area more ealier stage?

Jun Kuriyama <kuriyama at imgsrc.co.jp> // IMG SRC, Inc.
             <kuriyama at FreeBSD.org> // FreeBSD Project

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