bcdedit.exe 用于间接修改启动配置文件

1：启动一个管理权限的命令行窗口。
2：执行命名将当前的启动入口复制一份。引号中的字符串为新启动入口的名称。执行成功会返回新启动入口的GUID，用来唯一标识这个启动入口。新启动入口的GUID {xxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}
bcdedit /copy {current} /d "kernel Debug"

3：执行命令对启动入口启用内核调试。
bcdedit /debug {xxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx} on

4：设置目标机与主机之间的通信参数，根据实际情况开选择。如果使用1号串行口，波特率为115200。需要使用其他参数或者通信类型，WinDbg的帮助文件或者《软件调试》第18章。
bcdedit /set {xxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx} debugtype serial
bcdedit /set {xxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx} debugport 1
bcdedit /set {xxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx} baudrate 115200

5：命令行执行bcdedit列出刚刚创建的启动项和参数，确认以上设置都已经被记录下来。

Windows 启动管理器
--------------------
标识符                  {bootmgr}
device                  partition=C:
path                    \EFI\MICROSOFT\BOOT\BOOTMGFW.EFI
description             Windows Boot Manager
locale                  zh-CN
inherit                 {globalsettings}
flightsigning           Yes
default                 {current}
resumeobject            {4ef5cc3d-789c-11e9-a952-2cfda1be5fc6}
displayorder            {current}
                        {860d4d92-789c-11e9-a0e2-2cfda1be5fc6}
toolsdisplayorder       {memdiag}
timeout                 0

Windows 启动加载器
-------------------
标识符                  {current}
device                  partition=C:
path                    \Windows\system32\winload.efi
description             Windows 10 Enterprise LTSC 2019
locale                  zh-CN
inherit                 {bootloadersettings}
recoverysequence        {860d4d90-789c-11e9-a0e2-2cfda1be5fc6}
displaymessageoverride  Recovery
recoveryenabled         Yes
isolatedcontext         Yes
flightsigning           Yes
allowedinmemorysettings 0x15000075
osdevice                partition=C:
systemroot              \Windows
resumeobject            {4ef5cc3d-789c-11e9-a952-2cfda1be5fc6}
nx                      OptIn
bootmenupolicy          Standard
hypervisorlaunchtype    Off

Windows 启动加载器
-------------------
标识符                  {860d4d92-789c-11e9-a0e2-2cfda1be5fc6}
device                  partition=C:
path                    \Windows\system32\winload.efi
description             kernel Debug
locale                  zh-CN
inherit                 {bootloadersettings}
recoverysequence        {860d4d90-789c-11e9-a0e2-2cfda1be5fc6}
debugtype               Serial
debugport               1
baudrate                115200
displaymessageoverride  Recovery
recoveryenabled         Yes
isolatedcontext         Yes
flightsigning           Yes
allowedinmemorysettings 0x15000075
osdevice                partition=C:
systemroot              \Windows
resumeobject            {4ef5cc3d-789c-11e9-a952-2cfda1be5fc6}
nx                      OptIn
bootmenupolicy          Standard
hypervisorlaunchtype    Off
debug                   Yes

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