On 07/29/2015 08:45 AM, נעמה ממן wrote: > Hello, > > > > cross compiled raspberry pi kernel using an Ubuntu virtual machine. > > Using this configurations: > > > > CONFIG_DEBUG_INFO=y > > CONFIG_MAGIC_SYSRQ=y > CONFIG_FRAME_POINTER=y > CONFIG_KGDB=y > CONFIG_KGDB_SERIAL_CONSOLE=y > > CONFIG_KGDB_KDB=y > CONFIG_KDB_KEYBOARD=y > > The pc is connected to RPI by UART. > > Want to debug the raspberry pi kernel with kdb&kgdb. > > > > using the minicom (in vm host) to send the break signal (alt+a ,f(send > break) ,g(Go)) kdb&kgdb is working as expected > > when trying to use echo g > /proc/sysrq-trigger get the message : > > Entering kdb (current=0xc054ca80, pid 0) due to Keyboard Entry > > kdb>_ > > kdb stuck and doesn’t response to keyboard, so i cant enter kgdb :/ > > Do you have any suggestion why?
I have seem problems like this in the past and it is usually the case that the UART polling hooks are not written properly, or that the kernel is blocked on a lock, somewhere. Considering that you made it to the KDB prompt with no critical printks, I would suspect the UART driver is probably the issue. Jason. ------------------------------------------------------------------------------ _______________________________________________ Kgdb-bugreport mailing list Kgdb-bugreport@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kgdb-bugreport
