An Exynos port of Plan 9 on a ChromeBook... that would be seriously cool!
On Thu, Dec 19, 2013 at 4:12 PM, Steven Stallion <sstall...@gmail.com>wrote: > Evening 9fans, > > While working on the Chromebook (nee exynos) port I ended up in a > situation where I needed to use a more sophisticated JTAG debugger to > find an issue. I ended up grabbing a RealView ICE since they are > relatively cheap on eBay (around 500.00USD) compared to other models > capable of debugging Cortex-A15 cores. Older firmware revisions of the > RVI support the remote GDB protocol (in addition to the closed RDDI > protocol). I've written a simple 9P file server that translates > memory/register accesses to remote GDB targets. I haven't tried it > yet, but this should also work with OpenOCD as well. > > At the moment this is little more than a toy, but it has been stable > enough for me to debug issues on the board reliably. I've added > support for ARM and i386 for now - adding additional register maps for > the other mach types is straightforward. If there is enough demand, > I'll write up a man page and submit a patch. The setup for this isn't > particularly obvious since it requires some messing about with RVI > firmware updates and downloading the right version of RVDS to setup > the board, so a wiki page is deserved as well. > > For now, you can find the source in my contrib directory on sources: > /n/sources/contrib/stallion/src/gdbfs/ > > (Obligatory screenshot attached) > > Cheers, > > Steve >
