On Tuesday 01 October 2002 05:55, Bharata B Rao wrote: > On Mon, Sep 30, 2002 at 09:59:11AM +0200, Duncan Sands wrote: > > Hi all, I would like to monitor exactly when the kernel is writing > > to a certain I/O port. The device is a PCI device with some I/O > > mapped registers. They are written to/read from using outw, inw. > > Is there some debugging tool I can use to see all reads and writes? > > You could try putting io watchpoint on the port using dprobes. > > http://www.ibm.com/linux/ltc/projects/dprobes/ Thanks Bharata - I did that and it works fine. Some things that would be nice: (1) break only on io write / break only on io read (2) get the value written / read. It is possible to get on without these of course, but it would be convenient if they existed. Thanks again for your help, Duncan. -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
