Thanks, John. I've tried printk and other logging, but it's virtually impossible to trace something like audio, which spans many modules.
I'll look into Lauterbach. > On Apr 6, 2016, at 15:31 , John Syne <john3...@gmail.com> wrote: > > You can do this with CCSV6 with a USB200 JTAG adapter, but CCSV6 is no longer > kernel aware. CCSV4 was kernel aware, but won’t work with the current > kernels. You can still debug with single stepping, software and hardware > breakpoints, read/write memory, etc. Trying to debug a kernel module without > a kernel aware debugger is very difficult. Since you don’t know the load > address of the KM, it is difficult to set a breakpoint on INIT or probe. Best > to make the driver a kernel builtin so that you can break on the start of the > driver. > > For the most part, most kernel developers use printk to display status at > strategic locations in their driver. Also, ftrace and dynamic trace tools are > very useful. Read Documentation/trace on how to use these tools. They are > very powerful. I have never use KDBG, but that is another solution that might > work. > > I use Lauterbach, which is like the gold standard for Kernel debugging and it > is kernel aware and has a trace buffer. > > Regards, > John > > > > >> On Apr 6, 2016, at 2:56 PM, Rick Mann <rm...@latencyzero.com> wrote: >> >> What would I need to get/do to enable me to single-step through kernel code >> on BBB/G? JTAG header, some kind of interface, and a bunch of software >> installed on Ubuntu? Can anyone make specific recommendations? Is it even >> possible? >> >> Thanks, >> >> -- >> Rick Mann >> rm...@latencyzero.com >> >> >> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to the Google Groups >> "BeagleBoard" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to beagleboard+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/d/optout. > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to beagleboard+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. -- Rick Mann rm...@latencyzero.com -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
