Debugging Android kernel: Passing arguments to android kernel while booting

Question

I am trying to get kgdb working with Android kernel using http://bootloader.wikidot.com/android:kgdb. I got stucked at following step:

    Configure kernel          


        

Answer 1

An old post, but I've been looking at KGDB recently so thought I'd share:

For Android, I've been passing boot params in via the bootimg.cfg file which can be specified when you create (or update) your boot image. For example, I am updating an existing boot image with a new config file and new kernel using the following:

abootimg -u boot.img -f bootimg.cfg -u zImage-dtb

One of the params within this config file is "cmdline" where you can append your options.

Alternatively, for a quick and dirty modification you can pass the '-c "param=value"' option to abootimg which will allow you to specify new options on the fly.

Answer 2

http://www.stlinux.com/u-boot/kernel-booting

You can Change kernel command line like this:

setenv bootargs mem=128M kgdboc=ttyGS0 kgdbretry=4

saveenv

you may need to delete console=ttyAS0,115200 for kgdb to work properly.