Ron Jobmann wrote: > Is anyone successfully debugging code on ixp42x using Openocd? If so, > would you mind sharing config files/scripts that you're using? > > I want to be able to debug the linux kernel. So far, I've got Eclipse > set up and can cross compile fine. The next step I guess is to get > Eclipse to use Openocd to talk to the board. This is where I need > some help. > I use openocd to flash and debug u-boot - that part works fine.
Debugging the kernel is another thing: I tried this just today for the first time, without success: With JTAG disconnected, the board loads the kernel fine. With JTAG and openocd active, it hangs after "uncompressing kernel". I am not quite sure how OpenOCD handles debug entry on the IXP42x: AFAIR, you need to load code into the mini-instruction cache at address 0, which is the reset vector - however, that also overrides all the other vectors, regardless of what the kernel sets. The BDI2000 has a configuration option to load user-defined values into the non-reset vectors, which should match what the application uses - I have successfully debugged the Linux kernel on an IXP425 using a BDI2000 some time ago. Looking at the source, it seems OpenOCD lacks such an option, however, I am not sure if this is the only obstacle. cu Michael _______________________________________________ Openocd-development mailing list Openocd-development@lists.berlios.de https://lists.berlios.de/mailman/listinfo/openocd-development
