Date: Fri, 15 Jun 2012 08:21:37 -0400 From: John Baldwin <jhb@freebsd.org> To: freebsd-drivers@freebsd.org Cc: nagarjuna vempati <nagpersonal@gmail.com> Subject: Re: Issue with KGDB setup. System freezes when it enters ddb Message-ID: <201206150821.37736.jhb@freebsd.org> In-Reply-To: <CAKx_80-rdYS8Cb=znMn2m0JDjTe=NxPn3rGbEWBamBUtuLsgnQ@mail.gmail.com> References: <CAKx_80-rdYS8Cb=znMn2m0JDjTe=NxPn3rGbEWBamBUtuLsgnQ@mail.gmail.com>
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On Monday, June 11, 2012 12:49:46 pm nagarjuna vempati wrote: > Hello, > > Can someone plese help me understand what is the problem? > > After fresh disk installation of freeBSD9.0 AMD64 from disk, I copied > /usr/src/sys/am64/conf/GENERIC to KGDBKERNEL and added following lines to > the file > > options GDB > options DDB > options KDB_UNATTENDED > options BREAK_TO_DEBUGGER > options ALT_BREAK_TO_DEBUGGER > > After this I rebuilt the Kernel and installed as below. > > make buildworld > make buildkernel kernconf=KGDBKERNEL > make installkernel kernconf=KGDBKERNEL > Reboot into single user mode. > mergemaster -p > make installworld > mergemaster > Reboot. > > After this to setup KGDB I am using following document as my reference. > http://chetanbl.blogspot.com/ > > > To break into ddb I am trying issue sysctl debug.kdb.enter=1. Then the > system becomes unresponsive. Also, I tried to enter ddb at booting stage by > issuing boot -d command. Even then system becomes unresponsive. > > I need to solve this problem ASAP. Can someone helpme? The first thing I would try is to see if you can just get into DDB. Note that DDB is going to use your primary console, so if you haven't setup a serial console for your machine, then the DDB prompt will be on the VGA console. -- John Baldwin
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