On Sun, 2011-03-27 at 20:00 +0200, Philipp Ittershagen wrote: > On 03/25/2011 09:50 AM, Guillaume Dargaud wrote: > > Hello all, > > what can you do when the kernel you try to run stops before printing > > anything on the console ? > > http://elinux.org/Kernel_Debugging_Tips#Debugging_early_boot_problems > > Basically it means connecting a debugger to the running kernel (using > XMD, for example) and then reading the printk log buffer, which contains > the last lines printed.
It actually mostly depends on the platform. There's various powerpc specific early debug mechanisms that are more/less robust/functional depending on the CPU type, the platform, etc... Look in udbg.c, there's a list of early debug hacks in there controlled by various config options. Cheers, Ben. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev