does usbkd windbg debug extension work on Windows 7?

Question

I am trying the Windbg USB 2.0 Extensions (usbkd), but I got this,

kd> !usb2tree
*************************************************************************
***                                                                   ***
***                                                                   ***
***    Either you specified an unqualified symbol, or your debugger   ***
***    doesn't have full symbol information.  Unqualified symbol      ***
***    resolution is turned off by default. Please either specify a   ***
***    fully qualified symbol module!symbolname, or enable resolution ***
***    of unqualified symbols by typing ".symopt- 100". Note that   ***
***    enabling unqualified symbol resolution with network symbol     ***
***    server shares in the symbol path may cause the debugger to     ***
***    appear to hang for long periods of time when an incorrect      ***
***    symbol name is typed or the network symbol server is down.     ***
***                                                                   ***
***    For some commands to work properly, your symbol path           ***
***    must point to .pdb files that have full type information.      ***
***                                                                   ***
***    Certain .pdb files (such as the public OS symbols) do not      ***
***    contain the required information.  Contact the group that      ***
***    provided you with these symbols if you need this command to    ***
***    work.                                                          ***
***                                                                   ***
***    Type referenced: usbport!_USBPORT_MINIPORT_DRIVER                ***
***                                                                   ***
*************************************************************************

the symbol file usbport.pdb is loaded.

kd> lm m usbport start             end                 module name
fffff880`03da2000 fffff880`03df8000   USBPORT    (pdb symbols)        
c:\symbols\microsoft\usbport.pdb\71BCD350024D47208D5EA216690A7BFF1\usbport.pdb

so this is "the public OS symbols" that does not contain the required data type "usbport!_USBPORT_MINIPORT_DRIVER".

does it work on Windows 8? I am currently live debugging a Windows 7 VM. experiment shows that yes, it works for windows 8.

kd> vertarget
Windows 8 Kernel Version 9600 MP (1 procs) Free x64
Product: WinNt, suite: TerminalServer SingleUserTS
Built by: 9600.16404.amd64fre.winblue_gdr.130913-2141
Machine Name:
Kernel base = 0xfffff801`f5e0f000 PsLoadedModuleList = 0xfffff801`f60d3990
Debug session time: Thu Mar 27 22:03:13.966 2014 (UTC - 7:00)
System Uptime: 0 days 0:05:59.427
kd> !usb2tree

UHCI MINIPORT(s) dt usbport!_USBPORT_MINIPORT_DRIVER ffffe0000142d010

1)!uhci_info ffffe00001af61a0 !devobj ffffe00001af6050 PCI: VendorId 15ad DeviceId 0774 RevisionId 0000 
    RootHub !hub2_info ffffe000016601a0 !devstack ffffe00001660050
        Port 1: !port2_info ffffe00001626000 
        Port 2: !port2_info ffffe00001626b40 

EHCI MINIPORT(s) dt usbport!_USBPORT_MINIPORT_DRIVER ffffe00001431490

1)!ehci_info ffffe00001af31a0 !devobj ffffe00001af3050 PCI: VendorId 15ad DeviceId 0770 RevisionId 0000 
    RootHub !hub2_info ffffe000016881a0 !devstack ffffe00001688050
        Port 1: !port2_info ffffe00001741000 
        Port 2: !port2_info ffffe00001741b40 
        Port 3: !port2_info ffffe00001742680 
        Port 4: !port2_info ffffe000017431c0 
        Port 5: !port2_info ffffe00001743d00 
        Port 6: !port2_info ffffe00001744840 


Enumerated HUB List
-------------------
Root Hubs:
1) FDO ffffe00001660050 PDO ffffe0000161c050 Depth 0
    !hub2_info ffffe000016601a0
    Parent HC: !uhci_info ffffe00001af61a0
    FDO Power State: FdoS0_D0                                

2) FDO ffffe00001688050 PDO ffffe00001624050 Depth 0
    !hub2_info ffffe000016881a0
    Parent HC: !ehci_info ffffe00001af31a0
    FDO Power State: FdoS0_D0                                



Downstream Hubs:


Enumerated Device List
----------------------

• is the symbol for windows 7 public available at all?

Answer 1

Yup, windows 7 public symbols wouldn't have those structures. It'd work with Windows 8 and above.