This page is under construction
This wiki page will only cover useful tips and information regarding debugging Windows drivers on Qualcomm Snapdragon arm64 platforms.
For details on WinDbg usage, please refer to Microsoft documents.
# Prevent going to recovery when boot fails
bcdedit /store BCD /set "{default}" bootstatuspolicy IgnoreAllFailures
bcdedit /store BCD /set "{default}" recoveryenabled no
# Enable KDNET debugging
bcdedit /store BCD /set "{default}" debug on
bcdedit /store BCD /dbgsettings net HOSTIP:169.254.255.255 PORT:50000 KEY:1.2.3.4 NODHCP
You can get WinDbg Preview from Microsoft Store
After installing, open WinDbg Preview and navigate to Start Debugging, choose Attach to kernel, Port Number: 50000, Key: 1.2.3.4, then click OK. You can now connect your device to PC and boot it.
You must either get TMF (trace message format) files or PDB files to do tracing. Currently we only provide TMF files on GitHub.
Check Break on connection in the Start debugging page. After connecting to target, do an initial break:
bp ACPI!DriverEntry;g;g
After it breaks, set up wmitrace sessions:
!wmitrace.start whatever -kd
!wmitrace.searchpath C:\path\to\tmf\files
!wmitrace.enable whatever EF49A24A-40CD-46D0-8A8A-3623B7A18969 -level 0xFF
!wmitrace.enable whatever CE0458F5-EE40-403A-AF35-A3E7FACC2BD0 -level 0xFF
# one wmitrace instance can have multiple sessions
Then go:
g
The above GUIDs could be found in Driver Tracing GUIDs
to be filled