On Thu, 31 Jan 2013 18:24:01 +0100, Matthias Brugger said: > 2013/1/30 Rahul Gandhi <rahul.rahulg...@gmail.com>: > > I am trying to compile Kernel for my Android device. I am using the NDK > > Toolchain (arm-linux-androideabi-4.4.3). When I use the defconfig, the > > kernel compiles without any errors but when I flash it onto my device, it > > either gets stuck on the HTC logo or continuously reboots. > > If I pull the config.gz from my device, it gives errors at the tome of > > compilation. > > > > What could have possibly gone wrong? > > first of all, check the kernel logs. that will give you a clue where > to start digging.
If it hangs on the HTC logo or reboots, his kernel isn't living long enough for userspace to retrieve the dmesg buffer. First thing I'd try is a combo of the 3 kernel parameters 'earlyprintk', 'ignore_loglevel', 'initcall_debug' and either serial console or netconsole. Though it's quite possible that he's dying before even that infrastructure can give a hint, in which case it gets a lot trickier (and will probably require some help from the hardware platform in the form of either a JTAG interface or enough infrastructure to use kgdb or similar tool...)
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