KGDB kernel debugging

This is work in progress and does not work yet.

enabling KGDB in the kernel

The work is based on the work for the N1 described here ​Enabling KGDB for Android

The kernel that i use is a fork of pershoots vision-2635 kernel (which is based on the HTC 2.6.35 sources for the ACE). My fork that already contains the patches and the .config file can be found here ​vision-2635.

Development history

27.06.2011

Reduced USB-functions of device to acm only (see ​https://github.com/guhl/vision-2635/commit/351044f73b77f257d566ffbb0c09ea443b715ffc) to avoid conflicts between usb_fs, adb and acm on the usb-device. The outcome is that the device is now detected by cdc_acm as an acm device and the device is named /dev/ttyACMx instead of /dev/ttyUSBx. But connection to the kernel still does not work. Will test this again also on a different computer because it might be that modem-manager on my notebook interferes with the acm device.

Till 25.06.2011

Ported all the patches from the original site to the vision 2.6.35 sources.

Initial commit to github see ​initial commit

building the boot.img

The boot-ps_d.img thatI use for testing is built using the following command:

./mkbootimg --cmdline 'no_console_suspend=1 console=null kgdboc=ttyGS0 kgdbretry=10' --base 0x04000000 --kernel vision-2635/arch/arm/boot/zImage --ramdisk boot.img-ramdisk.gz -o boot-ps_d.img

The necessary ramdisk boot.img-ramdisk.gz was extracted from the original Cynogenmod 7.0.3 firmware using the command:

./split_bootimg.pl boot.img

The necessary tools can be found in the attachments.