Windbg USB3.0双机调试

配置需求

1. 目标主机有USB3.0 xHCI主机控制器，支持调试

[Port1]

Is Port User Connectable: yes

Is Port Debug Capable: yes

Companion Port Number: 3

Companion Hub Symbolic Link Name: USB#ROOT_HUB30#5&32bab638&0&0#{...}

Protocols Supported:

USB 1.1: no

USB 2.0: no

USB 3.0: yes

2. host主机支持USB3.0 xHCI主机控制器(使用UsbView查看)
3. USB 3.0 调试线(国外购买地址)（可以用普通USB3.0 公对公线改造，剪掉红绿百三根线）

先从淘宝买一根USB 3的A对A连线，有时也称公对公连线，很便宜。这根线需要加工一下才可以支持调试，加工的方法是选取线的某个位置，剥开外皮，然后把其中的红绿白三根线剪断，然后包上就可以了。USB 3电缆的线是有固定颜色的，如图3所示，
其中SDP是Shielded Differential Pair的缩写，即屏蔽起来的差分信号线，是USB 3.0的数据线，UTP是Unshielded Twisted Pair的缩写，即未屏蔽的双绞线，是USB1/2使用的数据线，所谓的D+，D-。要做的加工其实就是把2.0的三根弦剪断。剥开后，很容易找到红绿白三根，胆大心细，下剪子吧:-)。

4. 两台主机系统必须是Win8以上

On the host computer, an xHCI (USB 3.0) host controller
On the target computer, an xHCI (USB 3.0) host controller that supports debugging

步骤

在目标主机配置调试模式。

命令：

bcdedit /debug on
bcdedit /dbgsettings usb targetname:TargetName
//如果目标主机有多个xHCI主机控制器，则需要配置需要使用的，b.d.f在usbview中可以看到
bcdedit /set "{dbgsettings}" busparams b.d.f
//重启主机

使用msconfig配置，引导，高级模式，勾选调试，选择USB模式，USB目标名：usbdbg

host主机配置。

第一次配置，如果host是X64，开启X64 windbg，如果是x86，选择开启x86 windbg，需要管理员权限运行。

Ctrl+K，选择USB，填入目标主机配置的名字（usbdbg），确认，等待。

Microsoft (R) Windows Debugger Version 10.0.14321.1024 AMD64
Copyright (c) Microsoft Corporation. All rights reserved.

Using USB for debugging
Waiting to reconnect...
USB: Write opened

当将USB调试线插入host主机接口时，会自动安装相关驱动（usb2dbg等，管理员，位数等要求的原因）。

然后出现USB: Write opened表示与目标主机连接成功。

按下Ctrl+break，即可开始调试目标主机了

Connected to Windows 10 16299 x64 target at (Tue Dec 12 09:47:18.535 2017 (UTC + 8:00)), ptr64 TRUE
Kernel Debugger connection established.

************* Symbol Path validation summary **************
Response                         Time (ms)     Location
Deferred                                       SRV*e:\symbols* http://msdl.microsoft.com/download/symbols
Deferred                                       SRV*e:\symbols*http://msdl.microsoft.com/download/symbols
Symbol search path is: SRV*e:\symbols* http://msdl.microsoft.com/download/symbols;SRV*e:\symbols*http://msdl.microsoft.com/download/symbols
Executable search path is: 
Windows 10 Kernel Version 16299 MP (4 procs) Free x64
Product: WinNt, suite: TerminalServer SingleUserTS
Built by: 16299.15.amd64fre.rs3_release.170928-1534
Machine Name:
Kernel base = 0xfffff800`9e21d000 PsLoadedModuleList = 0xfffff800`9e57efb0
Debug session time: Tue Dec 12 09:47:12.452 2017 (UTC + 8:00)
System Uptime: 3 days 17:11:46.032
WARNING: Whitespace at end of path element

************* Symbol Path validation summary **************
Response                         Time (ms)     Location
Deferred                                       SRV*e:\symbols* http://msdl.microsoft.com/download/symbols
Deferred                                       SRV*e:\symbols*http://msdl.microsoft.com/download/symbols
Break instruction exception - code 80000003 (first chance)
*******************************************************************************
*                                                                             *
*   You are seeing this message because you pressed either                    *
*       CTRL+C (if you run console kernel debugger) or,                       *
*       CTRL+BREAK (if you run GUI kernel debugger),                          *
*   on your debugger machine's keyboard.                                      *
*                                                                             *
*                   THIS IS NOT A BUG OR A SYSTEM CRASH                       *
*                                                                             *
* If you did not intend to break into the debugger, press the "g" key, then   *
* press the "Enter" key now.  This message might immediately reappear.  If it *
* does, press "g" and "Enter" again.                                          *
*                                                                             *
*******************************************************************************
nt!DbgBreakPointWithStatus:
fffff800`9e386c60 cc              int     3

连接成功，设备管理中出现USB Debug Connection Device。

参考：

1. setting-up-a-usb-3-0-debug-cable-connection
2. USB3 Kernel Debugging with Dell PowerEdge 13G Servers
3. http://blog.techlab-xe.net/archives/1961
4. 使用USB3.0调试Windows 8