On Thu, Feb 09, 2017 at 12:13:22PM -0500, Steven Rostedt wrote: > Then came along live kernel patching, which I believe this series is > trying to support. What is needed by pt_regs is a way to "hijack" the > function being called to instead call the patched function. That is, > ftrace is not being used for tracing, but in reality, being used to > modify the running kernel. It is being used to change what function > gets called. ftrace is just a hook for that mechanism.
So, would I be correct to assume that the only parts of pt_regs that would be touched are those which contain arguments to the function, and the register which would contain the return value? -- RMK's Patch system: http://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up according to speedtest.net.
